Antoine Vienne | Wiki - User contributions [en]

Houdini learning

2025-08-06T14:14:27Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum,1);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum,1);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

=== Gets the digits from node name===
<pre>
// Add `padzero(3,opdigits("."))`
// Add `padzero(3,opdigits(".."))` for previous node padding
// padzero(3,opdigits(".")) without hscript
</pre>

=== Self-shadows in Mantra===
<pre>
// Add by example * ^RENDER_ground in Shadow Mask of every of your lights to exclude self-shadows
</pre>

=== Search and replace in VEX ===
<pre>
// To remove ShapeDeformed from Maya Alembics by example, in an Attribute Wrangle in Primitives

string path = @path;
s@path = re_replace(r"Deformed", "", path);
</pre>

=== Get only shape name from Maya alembic path ===
<pre>
// Attribwrangle on Primitives

s@last_split = split(s@path, "/")[-1];
s@last_split = split(s@last_split, ":")[-1];
</pre>

=== Ray dir (this one works) ===
<pre>
// Attribwrangle on Points, camera on second input

vector pt0 = point(1,'P',0);
v@raydir = normalize(pt0 - @P );
</pre>

=== Substract density on volume VDB near some points ===
<pre>
// Thanks to Quentin Rossetto
// Volumewrangle under volume/Vdb, points on second input - Set the Max distance

vector vpos = @P;

int npt = nearpoint(1, vpos);
vector nptp = point(1,"P",npt);

float distance = distance(vpos, nptp);
distance = fit(distance, chf("minDistance"), chf("maxDistance"),0,1);

@density *= chramp("fade",distance);
</pre>

Houdini learning

2025-05-30T19:00:53Z

Walter:

Houdini learning

2025-04-17T10:04:15Z

Walter:

Windows directories

2025-01-20T23:34:41Z

Walter: Created page with "=Windows= === Create directories=== <pre> set projectName=Toto set disk=D:\ set list=shot_001 shot_002 shot_003 // NO CHANGES BELOW set projectFolder=%disk%%projectName..."

=Windows=
=== Create directories===
<pre>
set projectName=Toto

set disk=D:\

set list=shot_001 shot_002 shot_003

// NO CHANGES BELOW

set projectFolder=%disk%%projectName%

mkdir %projectFolder%

(for %%a in (%list%) do (
mkdir %projectFolder%\%%a
mkdir %projectFolder%\%%a\compo
mkdir %projectFolder%\%%a\compo\in
mkdir %projectFolder%\%%a\compo\work
mkdir %projectFolder%\%%a\compo\out
mkdir %projectFolder%\%%a\3d
mkdir %projectFolder%\%%a\3d\in
mkdir %projectFolder%\%%a\3d\work
mkdir %projectFolder%\%%a\3d\out
mkdir %projectFolder%\%%a\labo
mkdir %projectFolder%\%%a\track
))

</pre>

Main Page

2025-01-20T23:34:01Z

Walter:

Main Page

2025-01-20T23:33:51Z

Walter:

Main Page

2025-01-20T23:33:10Z

Walter:

Maya Mel

2024-10-17T13:08:32Z

Walter:

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
DeleteHistory;
}
</pre>

=== ONE-CLICK Unfold UVs ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;

string $selectedObject [] = `ls -selection -objectsOnly`;

select -r ($selectedObject[0]+".e[*]");
hilite ($selectedObject[0]+".e[*]") ;
polyMapCut -ch 1 ($selectedObject[0]+".e[*]");
polyForceUV -unitize $selectedObject[0];

select $selectedObject[0];
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($selectedObject[0]+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($selectedObject[0]+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $selectedObject[0];
select $selectedObject[0];
</pre>

=== Create Texture Reference on all shapes from a group ===
<pre>
// Select top group first

string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;

for ($i = 0; $i < size($polyGons); $i ++)
{
select -r $polyGons[$i] ;
CreateTextureReferenceObject;
}

select -r $selection;
</pre>

=== Search and select by name ===
<pre>
// If you want to select every object containing "tree"
// From NaughtyNathan on CGTalk

select -r "*tree*";

// And if you want to select only transforms containing "tree"

select `ls -type "transform" "*tree*"`;

// And if you are using namespace, you need:

select -r `ls -r 1 "*tree*"`;
</pre>

=== Search and select UI ===
<pre>
window -t "Search and Select";
columnLayout;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestTransform";

proc searchSelectTransform() {
string $what = ("*" + `textField -q -text "requestTransform"` + "*");
select -r `ls -type "transform" -r 1 $what`;
}

button -label "Search and select Transforms" -command "searchSelectTransform";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestShape";

proc searchSelectShape() {
string $what = ("*" + `textField -q -text "requestShape"` + "*");
select -r `ls -type "shape" -r 1 $what`;
}

button -label "Search and select Shapes" -command "searchSelectShape";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestAny";

proc searchSelectAny() {
string $what = ("*" + `textField -q -text "requestAny"` + "*");
select -r `ls -r 1 $what`;
}

button -label "Search and select any type" -command "searchSelectAny";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestCtrls";

proc searchSelectCtrls() {
string $what = ("*" + `textField -q -text "requestCtrls"` + "*");
select -r `ls -type "nurbsCurve" -r 1 $what`;
}

button -label "Search and select Ctrls" -command "searchSelectCtrls";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestJoints";

proc searchSelectJoints() {
string $what = ("*" + `textField -q -text "requestJoints"` + "*");
select -r `ls -type "joint" -r 1 $what`;
}

button -label "Search and select Joints" -command "searchSelectJoints";
setParent..;

showWindow;
</pre>

=== Constrain Parent and Scale on a selection of objects ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r pCube1 ;
select -add $object ;
doCreateParentConstraintArgList 1 { "1","0","0","0","0","0","0","0","1","","1" };
parentConstraint -mo -weight 1;
doCreateScaleConstraintArgList 1 { "0","1","1","1","0","0","0","1","","1" };
scaleConstraint -offset 1 1 1 -weight 1;
}
</pre>

=== All ASS Arnold proxies in bounding box ===
<pre>
select `ls -type "aiStandIn"`;

for ( $object in `ls -sl -l` ) {
setAttr ($object + ".mode") (0);
}
</pre>

=== Replace Gpu Cache by Alembic Geometry ===
<pre>
for ( $gpuNode in `ls -sl -l` ) {
string $path = getAttr ($gpuNode+".cacheFileName");
AbcImport -reparent $gpuNode -mode import $path;
}
</pre>

Maya Mel

2024-09-25T18:51:21Z

Walter:

Nuke Python

2024-08-02T18:29:11Z

Walter:

=Nuke Python Scripts=

=== Getting advanced settings/Knobs informations ===
<pre>
#For a specific knob, here for "mov32_settings" in a Write node
i = nuke.selectedNode()
print i.knob('mov32_settings').value()

#Or for the whole node - https://berniebernie.fr/wiki/
print(nuke.selectedNode())

</pre>

=== Create multiple Writes nodes for multiples Reads - With RGBA channels activated ===
<pre>
//Select Read nodes first

root_frame_path = "/YOUR_PATH"

nodes = nuke.selectedNodes()

for n in nodes:

roto_name = n.name()

n.setSelected(True)

w = nuke.createNode( "Write" )

write_name = roto_name.replace("Roto", "Write_")

w.knob("name").setValue(write_name)

image_path = "{root_frame_path}/{write_name}.png".format(root_frame_path=root_frame_path, write_name=write_name)

w.knob("file").setValue(image_path)

for a in nuke.allNodes('Write'):

a['channels'].setValue('rgba')

</pre>

=== Change specific attribute on all nodes ===
<pre>
//Works also with "selectedNodes"
//"render_mode" and "textured+wireframe" are examples of attributes to be changed.

sn = nuke.allNodes()

for n in sn:

n.knob('render_mode').setValue("textured+wireframe")

//Alternative script for selectedNodes:

for a in nuke.selectedNodes('Write'):

a['channels'].setValue('rgba')

//Alternative script for allNodes:

for a in nuke.allNodes('Write'):

a['channels'].setValue('rgba')

</pre>

=== Set localizationPolicy off on all Read nodes ===
<pre>
sn = nuke.allNodes()

for n in sn:

n.knob('localizationPolicy').setValue("off")

</pre>

=== Set value of BBox parameter in Merge nodes to B ===
<pre>
for n in nuke.allNodes('Merge2'):

n['bbox'].setValue("B")

</pre>

=== Count selected nodes ===
<pre>
len(nuke.selectedNodes())

</pre>

=== Export multiple files in DXV ===
<pre>
#This script comes from the great Benjamin Vedrenne. DXV is the codec made by and for Resolume.
#Select all Read nodes or sources first.
#This script create a write node under each selected read nodes. Easy for fast and massive file conversion TO VIDEO.

for oReadNode in nuke.selectedNodes():

oPath = oReadNode['file'].value()
first = oReadNode['first'].value()
last = oReadNode['last'].value()
newPath = oPath.split('/')[-2]
oReadNode['selected'].setValue(True)
Write = nuke.createNode ("Write")

#Specify file path here
osdir = 'C:/DXV/tmp'

Write.knob("beforeRender").setValue("import os\nif not os.path.isdir(os.path.dirname(nuke.thisNode()['file'].evaluate())):\n os.makedirs(os.path.dirname(nuke.thisNode()['file'].evaluate()))")
Write.knob('channels').setValue('rgba')
Write.knob('file').setValue(osdir+'/'+newPath+".mov")
Write.knob('file_type').setValue('mov')
Write.knob('meta_codec').setValue('DXD3')
Write.knob('mov32_fps').setValue(24)
Write.knob('use_limit').setValue(True)
Write.knob('first').setValue(first)
Write.knob('last').setValue(last)
Write.knob('mov32_settings').setValue('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')

</pre>

=== Reformat selected Read nodes and Write it ===
<pre>
#Select Read nodes and put the right path below

for oReadNode in nuke.selectedNodes():

oPath = oReadNode['file'].value()
first = oReadNode['first'].value()
last = oReadNode['last'].value()
newPath = oPath.split('/')[-1]
oReadNode['selected'].setValue(True)
Reformat = nuke.createNode ("Reformat")
Reformat.knob('format').setValue('square_1K')
Write = nuke.createNode ("Write")

#Specify file path here
osdir = 'C:/YOUR_PATH'

Write.knob("beforeRender").setValue("import os\nif not os.path.isdir(os.path.dirname(nuke.thisNode()['file'].evaluate())):\n os.makedirs(os.path.dirname(nuke.thisNode()['file'].evaluate()))")
Write.knob('channels').setValue('rgb')
Write.knob('file').setValue(osdir+'/'+newPath)
Write.knob('file_type').setValue('jpeg')
Write.knob('_jpeg_quality').setValue(1)
Write.knob('use_limit').setValue(True)
Write.knob('first').setValue(first)
Write.knob('last').setValue(last)

</pre>

=== Start selected Read nodes at frame 1 ===
<pre>
for n in nuke.selectedNodes('Read'):

n['frame_mode'].setValue("1")
n['frame'].setValue("1")

</pre>

=== DPX Writes in sRGB (D60 sim.) from Read nodes ===
<pre>
for oReadNode in nuke.selectedNodes():

oPath = oReadNode['file'].value()
first = oReadNode['first'].value()
last = oReadNode['last'].value()
newPath = oPath.split('/')[-1]
oReadNode['selected'].setValue(True)

Write = nuke.createNode ("Write")

#Specify file path here
osdir ='C:/YOUR_PATH'

Write.knob('channels').setValue('rgb')
Write.knob('colorspace').setValue('83)')
Write.knob('file').setValue(osdir+'/'+newPath)
Write.knob('file_type').setValue('dpx')
Write.knob('use_limit').setValue(True)
Write.knob('first').setValue(first)
Write.knob('last').setValue(last)

</pre>

=== Set Create directories ON on all Write nodes ===
<pre>
for n in nuke.allNodes('Write'):

n['create_directories'].setValue(True)

</pre>

=== DPX Writes from Read nodes - Starting at frame 1 ===
<pre>
for oReadNode in nuke.selectedNodes():

oPath = oReadNode['file'].value()
first = oReadNode['first'].value()
last = oReadNode['last'].value()
newPath = oPath.split('/')[-1]
oReadNode['selected'].setValue(True)

Write = nuke.createNode ("Write")

#Specify file path here
osdir ='C:/YOUR_PATH'

Write.knob('channels').setValue('rgb')
Write.knob('colorspace').setValue('0)')
Write.knob('file').setValue(osdir+'/'+newPath)
Write.knob('file_type').setValue('dpx')
Write.knob('use_limit').setValue(True)
Write.knob('first').setValue(1)
Write.knob('last').setValue(last-first+1)
Write.knob('create_directories').setValue(True)

</pre>

=== JPG Writes from Read nodes - With LUT transform ===
<pre>
for oReadNode in nuke.selectedNodes():

oPath = oReadNode['file'].value()
first = oReadNode['first'].value()
last = oReadNode['last'].value()
newPath = oPath.split('/')[-2]
oReadNode['selected'].setValue(True)
OCIOFileTransform = nuke.createNode ("OCIOFileTransform")
OCIOFileTransform.knob('working_space').setValue('sRGB')

#Specify lut path here
lutpath = 'C:/YOUR_PATH/YOUR_LUT.3dl'

OCIOFileTransform.knob('file').setValue(lutpath)
Write = nuke.createNode ("Write")

#Specify file path here
osdir = 'C:/YOUR_PATH'

Write.knob("beforeRender").setValue("import os\nif not os.path.isdir(os.path.dirname(nuke.thisNode()['file'].evaluate())):\n os.makedirs(os.path.dirname(nuke.thisNode()['file'].evaluate()))")
Write.knob('channels').setValue('rgb')
Write.knob('file').setValue(osdir+'/'+newPath+'/'+newPath+".####.jpg")
Write.knob('file_type').setValue('jpeg')
Write.knob('_jpeg_quality').setValue(1)
Write.knob('use_limit').setValue(True)
Write.knob('first').setValue(first)
Write.knob('last').setValue(last)

</pre>

=== EXR Writes from Read nodes - Out Rec 709 to AcesCG ===
<pre>
for oReadNode in nuke.selectedNodes():

oReadNode['colorspace'].setValue('out_rec709')
oPath = oReadNode['file'].value()
first = oReadNode['first'].value()
last = oReadNode['last'].value()
newPath = oPath.split('/')[-2]
oReadNode['selected'].setValue(True)

Write = nuke.createNode ("Write")
Write.knob("beforeRender").setValue("import os\nif not os.path.isdir(os.path.dirname(nuke.thisNode()['file'].evaluate())):\n os.makedirs(os.path.dirname(nuke.thisNode()['file'].evaluate()))")
Write.knob('channels').setValue('rgb')
oPath = oPath.replace('.%04d.png', '_ACEScg.%04d.exr')
oPath = oPath.replace('.1001.png', '_ACEScg.1001.exr')
Write.knob('file').setValue(oPath)
Write.knob('colorspace').setValue('ACES - ACEScg')
Write.knob('file_type').setValue('exr')
Write.knob('use_limit').setValue(True)
Write.knob('first').setValue(first)
Write.knob('last').setValue(last)

</pre>

=== All Read nodes set on nearest frame ===
<pre>
for n in nuke.allNodes('Read'):

n['on_error'].setValue(3)
</pre>

=== Same frame on all FrameHolds ===
<pre>
for n in nuke.allNodes('FrameHold'):

n['first_frame'].setValue(993)
</pre>

=== All Reformats on Cubic ===
<pre>
for n in nuke.allNodes('Reformat'):

n['filter'].setValue(1)
</pre>

=== Enable all Read nodes ===
<pre>
for node in nuke.allNodes('Read'):
nuke.toNode(node.name()).knob('disable').setValue(False)
</pre>

=== Executing button on selected nodes ===
<pre>
sn = nuke.selectedNodes()
for n in sn:
n.knob('myKnob').execute()
</pre>

Houdini learning

2024-05-07T09:57:09Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

=== Gets the digits from node name===
<pre>
// Add `padzero(3,opdigits("."))`
// Add `padzero(3,opdigits(".."))` for previous node padding
// padzero(3,opdigits(".")) without hscript
</pre>

=== Self-shadows in Mantra===
<pre>
// Add by example * ^RENDER_ground in Shadow Mask of every of your lights to exclude self-shadows
</pre>

=== Search and replace in VEX ===
<pre>
// To remove ShapeDeformed from Maya Alembics by example, in an Attribute Wrangle in Primitives

string path = @path;
s@path = re_replace(r"Deformed", "", path);
</pre>

=== Get only shape name from Maya alembic path ===
<pre>
// Attribwrangle on Primitives

s@last_split = split(s@path, "/")[-1];
s@last_split = split(s@last_split, ":")[-1];
</pre>

Maya Mel

2024-03-07T13:55:47Z

Walter: /* Constrain Parent and scale selection of objects */

Maya Mel

2024-03-07T13:55:33Z

Walter:

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
DeleteHistory;
}
</pre>

=== ONE-CLICK Unfold UVs ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;

string $selectedObject [] = `ls -selection -objectsOnly`;

select -r ($selectedObject[0]+".e[*]");
hilite ($selectedObject[0]+".e[*]") ;
polyMapCut -ch 1 ($selectedObject[0]+".e[*]");
polyForceUV -unitize $selectedObject[0];

select $selectedObject[0];
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($selectedObject[0]+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($selectedObject[0]+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $selectedObject[0];
select $selectedObject[0];
</pre>

=== Create Texture Reference on all shapes from a group ===
<pre>
// Select top group first

string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;

for ($i = 0; $i < size($polyGons); $i ++)
{
select -r $polyGons[$i] ;
CreateTextureReferenceObject;
}

select -r $selection;
</pre>

=== Search and select by name ===
<pre>
// If you want to select every object containing "tree"
// From NaughtyNathan on CGTalk

select -r "*tree*";

// And if you want to select only transforms containing "tree"

select `ls -type "transform" "*tree*"`;

// And if you are using namespace, you need:

select -r `ls -r 1 "*tree*"`;
</pre>

=== Search and select UI ===
<pre>
window -t "Search and Select";
columnLayout;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestTransform";

proc searchSelectTransform() {
string $what = ("*" + `textField -q -text "requestTransform"` + "*");
select -r `ls -type "transform" -r 1 $what`;
}

button -label "Search and select Transforms" -command "searchSelectTransform";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestShape";

proc searchSelectShape() {
string $what = ("*" + `textField -q -text "requestShape"` + "*");
select -r `ls -type "shape" -r 1 $what`;
}

button -label "Search and select Shapes" -command "searchSelectShape";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestAny";

proc searchSelectAny() {
string $what = ("*" + `textField -q -text "requestAny"` + "*");
select -r `ls -r 1 $what`;
}

button -label "Search and select any type" -command "searchSelectAny";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestCtrls";

proc searchSelectCtrls() {
string $what = ("*" + `textField -q -text "requestCtrls"` + "*");
select -r `ls -type "nurbsCurve" -r 1 $what`;
}

button -label "Search and select Ctrls" -command "searchSelectCtrls";
setParent..;

frameLayout -mh 10 -mw 10 -l "" ;

textField -text TOTO -w 200 "requestJoints";

proc searchSelectJoints() {
string $what = ("*" + `textField -q -text "requestJoints"` + "*");
select -r `ls -type "joint" -r 1 $what`;
}

button -label "Search and select Joints" -command "searchSelectJoints";
setParent..;

showWindow;
</pre>

=== Constrain Parent and scale selection of objects ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r pCube1 ;
select -add $object ;
doCreateParentConstraintArgList 1 { "1","0","0","0","0","0","0","0","1","","1" };
parentConstraint -mo -weight 1;
doCreateScaleConstraintArgList 1 { "0","1","1","1","0","0","0","1","","1" };
scaleConstraint -offset 1 1 1 -weight 1;
}
</pre>

Houdini learning

2024-02-14T10:34:18Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

=== Gets the digits from node name===
<pre>
// Add `padzero(3,opdigits("."))`
// Add `padzero(3,opdigits(".."))` for previous node padding
// padzero(3,opdigits(".")) without hscript
</pre>

=== Self-shadows in Mantra===
<pre>
// Add by example * ^RENDER_ground in Shadow Mask of every of your lights to exclude self-shadows
</pre>

=== Search and replace in VEX ===
<pre>
// To remove ShapeDeformed from Maya Alembics by example, in an Attribute Wrangle in Primitives

string path = @path;
s@path = re_replace(r"Deformed", "", path);
</pre>

Houdini learning

2024-02-08T19:48:53Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

=== Gets the digits from node name===
<pre>
// Add `padzero(3,opdigits("."))`
// Add `padzero(3,opdigits(".."))` for previous node padding
// padzero(3,opdigits(".")) without hscript
</pre>

=== Self-shadows in Mantra===
<pre>
// Add by example * ^RENDER_ground in Shadow Mask of every of your lights to exclude self-shadows
</pre>

Houdini learning

2023-10-27T11:09:07Z

Walter: /* Gets the digits from node name */

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

=== Gets the digits from node name===
<pre>
// Add `padzero(3,opdigits("."))`
// Add `padzero(3,opdigits(".."))` for previous node padding
// padzero(3,opdigits(".")) without hscript
</pre>

Maya Mel

2023-10-04T15:36:51Z

Walter:

Maya Mel

2023-10-04T14:38:48Z

Walter: /* Search and select by name */

Maya Mel

2023-10-04T14:32:24Z

Walter: /* Search and select by name */

Maya Mel

2023-10-03T18:59:50Z

Walter:

Maya Mel

2023-10-02T08:09:18Z

Walter: /* Unfold UVs */

Maya tmp

2023-09-29T13:09:05Z

Walter:

=Maya tmp Scripts=
=== Maya Python - Create object & Randomize Translate ===
<pre>
from maya import cmds
import random

numObjects = 4

for n in range(numObjects):
obj = cmds.polyCube()
cmds.setAttr(obj[0]+'.translateX', random.randint(0, 5))
cmds.setAttr(obj[0]+'.translateY', random.randint(0, 5))
cmds.setAttr(obj[0]+'.translateZ', random.randint(0, 5))

</pre>

=== Maya Python - Randomize translate of selection #1===
<pre>
from maya import cmds
import random

objList = cmds.ls(selection=True)

print objList

for obj in objList:
cmds.setAttr(obj+'.translateX', random.randint(0, 5))
cmds.setAttr(obj+'.translateY', random.randint(0, 5))
cmds.setAttr(obj+'.translateZ', random.randint(0, 5))

</pre>

=== Maya Python - Randomize translate of selection #2===
<pre>
#La meme chose en utilisant une fonction
from maya import cmds
import random

objList = cmds.ls(selection=True)

print objList

#On definit la fonction
def randomize(minValue=0, maxValue=5):
for obj in objList:
cmds.setAttr(obj+'.translateX', random.randint(minValue, maxValue))
cmds.setAttr(obj+'.translateY', random.randint(minValue, maxValue))
cmds.setAttr(obj+'.translateZ', random.randint(minValue, maxValue))

#On change si besoin les valeurs par defaut avant d'executer la fonction
randomize(minValue=4, maxValue=20)

</pre>

=== Maya Mel - Replace path - getAttr/setAttr===
<pre>
for ( $object in `ls -sl -l` ) {
$path = getAttr ($object+".filePrefix");
setAttr -type "string" ($object+".filePrefix") ($path+"yo");
}

for ( $object in `ls -sl -l` ) {
setAttr -type "string" ($object+".filePrefix") ("//blabla/bla.abc");
}

</pre>

=== Maya Mel - Auto Uvs and Layout===
<pre>
polyMultiLayoutUV -scale 1 -rotateForBestFit 0 -layout 2;

</pre>

=== Instance and Snap ===
<pre>

//DE-PARENT meshs
string $VRMeshs = "*VR";
select -r $VRMeshs;
parent -w;
select -cl;

////Basket Grass
//replace_locator_by_object
string $objectCible = "Basket_Grass_VR";
string $locatorPlacement = "Basket_Grass_AR*";

select -cl;
select -r $locatorPlacement;
//pickWalk -d up;
string $selLocatorPlacement[] = `ls -sl`;
int $nbreLocatorPlacement = size ($selLocatorPlacement);

select -r $objectCible;
for ($i=1; $i<$nbreLocatorPlacement; ++$i)
{
instance -st;
}
select -cl;

////////////////
string $objectCibleI = "Basket_Grass_VR*";
select -r $objectCibleI;
pickWalk -d up;
string $selObjectCible[] = `ls -sl`;
int $nbreObjectCible = size ($selObjectCible);

select -cl;

for ($i=0; $i<$nbreObjectCible; ++$i)
{
select -r $selLocatorPlacement[$i];
select -add $selObjectCible[$i];
pointConstraint -offset 0 0 0 -weight 1;
orientConstraint -offset 0 0 0 -weight 1;
scaleConstraint -offset 1 1 1 -weight 1;
select -r "*Constraint*";
doDelete;
}

select -cl;

select -r $locatorPlacement;
doDelete;
select -cl;
////////////////

</pre>

=== Maya Mel - Primary visibility off===
<pre>
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Create and connect VRayMtls, files and place2dTextures for a set of objects ===
<pre>
// Replace assetBaked_Set by the name of your set

select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select $polyGons;
for($object in `ls -sl`){

string $shaderName = ($object + "_BAKE_" + `toupper $lightRigName` + "_SHD");
string $shadingGroupName = ($object + "_BAKE_" + `toupper $lightRigName` + "_SG");
shadingNode -asShader VRayMtl -n $shaderName;
sets -renderable true -noSurfaceShader true -empty -name $shadingGroupName;

string $shaderNameC = substituteAllString($shaderName, "|", "");
string $shadingGroupNameC = substituteAllString($shadingGroupName, "|", "");
connectAttr -f ($shaderNameC + ".outColor") ($shadingGroupNameC + ".surfaceShader");

setAttr ($shaderNameC + ".color") -type double3 0 0 0 ;

string $fileName = ("file_" + $object);
string $place2dTextureName = ("place2dTexture_" + $object);
shadingNode -asTexture -isColorManaged file -n $fileName;
shadingNode -asUtility place2dTexture -n $place2dTextureName;

string $objectC = substituteAllString($object, "|", "");
string $fileNameC = ("file_" + $objectC);
string $place2dTextureNameC = ("place2dTexture_" + $objectC);

setAttr ($fileNameC + ".filterType") 0;
setAttr ($fileNameC + ".uvTilingMode") 3;
setAttr ($fileNameC + ".cs") -type "string" "ACES - ACEScg";

connectAttr -f ($place2dTextureNameC + ".coverage") ($fileNameC + ".coverage");
connectAttr -f ($place2dTextureNameC + ".translateFrame") ($fileNameC + ".translateFrame");
connectAttr -f ($place2dTextureNameC + ".rotateFrame") ($fileNameC + ".rotateFrame");
connectAttr -f ($place2dTextureNameC + ".mirrorU") ($fileNameC + ".mirrorU");
connectAttr -f ($place2dTextureNameC + ".mirrorV") ($fileNameC + ".mirrorV");
connectAttr -f ($place2dTextureNameC + ".stagger") ($fileNameC + ".stagger");
connectAttr -f ($place2dTextureNameC + ".wrapU") ($fileNameC + ".wrapU");
connectAttr -f ($place2dTextureNameC + ".wrapV") ($fileNameC + ".wrapV");
connectAttr -f ($place2dTextureNameC + ".repeatUV") ($fileNameC + ".repeatUV");
connectAttr -f ($place2dTextureNameC + ".offset") ($fileNameC + ".offset");
connectAttr -f ($place2dTextureNameC + ".rotateUV") ($fileNameC + ".rotateUV");
connectAttr -f ($place2dTextureNameC + ".noiseUV") ($fileNameC + ".noiseUV");
connectAttr -f ($place2dTextureNameC + ".vertexUvOne") ($fileNameC + ".vertexUvOne");
connectAttr -f ($place2dTextureNameC + ".vertexUvTwo") ($fileNameC + ".vertexUvTwo");
connectAttr -f ($place2dTextureNameC + ".vertexUvThree") ($fileNameC + ".vertexUvThree");
connectAttr -f ($place2dTextureNameC + ".vertexCameraOne") ($fileNameC + ".vertexCameraOne");
connectAttr ($place2dTextureNameC + ".outUV") ($fileNameC + ".uv");
connectAttr ($place2dTextureNameC + ".outUvFilterSize") ($fileNameC + ".uvFilterSize");

connectAttr -f ($fileNameC + ".outColor") ($shaderNameC + ".illumColor");

sets -e -forceElement $shadingGroupNameC $object;
}
select -cl ;

</pre>

=== Maya Mel - Shift Translate for each objects of a group ===
<pre>
// Select top group first

string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;

for ($i = 0; $i < size($polyGons); $i ++)
{
setAttr ($polyGons[$i] + ".translateX") ($i*2);
}

select -r $selection;
</pre>

Maya Mel

2023-09-29T13:04:30Z

Walter:

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
DeleteHistory;
}
</pre>

=== Unfold UVs ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($object+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($object+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $object;
select -cl;
</pre>

=== Create Texture Reference on all shapes from a group ===
<pre>
// Select top group first

string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;

for ($i = 0; $i < size($polyGons); $i ++)
{
select -r $polyGons[$i] ;
CreateTextureReferenceObject;
}

select -r $selection;
</pre>

Nuke Python

2023-09-28T15:15:06Z

Walter:

Maya Mel

2023-09-27T12:34:04Z

Walter: /* Unfold UVs (one square UV by face) */

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
DeleteHistory;
}
</pre>

=== Unfold UVs ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($object+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($object+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $object;
select -cl;
</pre>

Maya Mel

2023-09-27T12:33:53Z

Walter: /* Unfold UVs (one square UV by face) */

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
DeleteHistory;
}
</pre>

=== Unfold UVs (one square UV by face) ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($object+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($object+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $object;
select -cl;
</pre>

Maya Mel

2023-09-27T12:33:43Z

Walter: /* Unitize UVs (one square UV by face) */

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
DeleteHistory;
}
</pre>

=== Unfold UVs (one square UV by face) ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($object+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($object+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $object;
</pre>

Maya Mel

2023-09-27T12:28:49Z

Walter:

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Combine objects ===
<pre>
// Select objects

polyPerformAction polyUnite o 0;
DeleteHistory;
FreezeTransformations;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
CenterPivot;
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
}
</pre>

=== Unfold UVs (one square UV by face) ===
<pre>
// Select seams edges first

invertSelection;
string $selectedEdges [] = `ls -sl`;
polyMapSewMove -nf 10 -lps 0 -ch 1 $selectedEdges;
select -r ($object+".map[*]");
u3dUnfold -ite 1 -p 0 -bi 1 -tf 1 -ms 1024 -rs 0 ($object+".map[*]");
u3dLayout -res 256 -scl 1 -spc 0.001 -mar 0.01 -box 0 1 0 1 $object;
</pre>

Maya Mel

2023-09-27T12:10:53Z

Walter:

Maya Mel

2023-09-27T12:09:40Z

Walter: /* Unitize UVs (one square UV by face) */

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects

for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
}
</pre>

Maya Mel

2023-09-27T12:09:21Z

Walter: /* Unitize UVs (one square UV by face) */

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
select $object;
}
</pre>

Maya Mel

2023-09-27T12:08:03Z

Walter:

=Maya Mels Scripts=
=== Octane Render Baking group id - Assign id to multiple objects shapes ===
<pre>
// 0 is for Red, 2 for Green, 4 for Blue
// 3, 5 and 6 for Cyan, Magenta and Yellow
// Replace the number "0" by the number of your choice
// Baking group id is also avalaible in Attribute Spreadsheet Editor

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".octBakGrId") (0);
}

</pre>

=== Maxwell Render - Particles sequence - Force .abc file ===
<pre>
//This expression force Maya to reload an Alembic particles file at each frame - there is no other way in Maxwell Render to read a particles sequence in .abc

global int $current_frame;
$current_frame = `currentTime -query`;
print $current_frame;
{
setAttr -type "string" maxwellRFRKParticles1.file ("/YOUR_PATH/YOUR_FILE" + $current_frame + ".abc");
}

</pre>

=== Maxwell Render - Specify object ID color ===
<pre>
// Specify object ID color

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".mxSpecifyObjIdColor") (1);
setAttr ($object + ".mxObjIdColor") -type "double3" 1 0 0;
}

</pre>

=== Redshift - Add blend attribute and set random value for objects selection ===
<pre>
// Useful for blending between colors with RedshiftUserDataScalar

for ( $object in `ls -sl -l` ) {
print($object);
addAttr -ln "blend" -at double -min 0 -max 1 -dv 0 $object;
setAttr ($object + ".blend") (rand(1));
}

</pre>

=== Redshift - Set Primary visibility off for selection (layer override) ===
<pre>
// Go in right render layer and select objects

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsEnableVisibilityOverrides") (1);
editRenderLayerAdjustment ($object + ".rsPrimaryRayVisible");
setAttr ($object + ".rsPrimaryRayVisible") (0);
}

</pre>

=== Convert Motion trail to curve ===
<pre>
// Select the motion trail first

{
$selected=`ls -dag -et snapshotShape`;
for ($obj in $selected){
$pts=(getAttr($obj+".pts"));
$size=size($pts);
$curve=`curve -d 1 -p $pts[0] $pts[1] $pts[2] -p $pts[4] $pts[5] $pts[6] -k 0 -k 1`;
for($i=8;$i<$size;$i+=4)
curve -os -a -p $pts[$i] $pts[$i+1] $pts[$i+2] $curve ;
}
}

</pre>

=== Quantize keyframes for selection ===
<pre>
// Snap keys on frames for objects selection

for ( $object in `ls -sl -l` ) {
print($object+"\n");
snapKey $object;
}

</pre>

=== Loop image sequence for texture ===
<pre>
// On File texture, check Image sequence, and edit expression

file1.frameExtension=((frame%8)+1);

</pre>

=== Symmetrize - Duplicate & merge object ===
<pre>
// Select half object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
select -add $object ;
polyPerformAction polyUnite o 0;
polyMergeVertex -d 0.0001 -am 1 -ch 1;
DeleteHistory;
rename ($object);
}

</pre>

=== Mirror object ===
<pre>
// Select object first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
DeleteHistory;
makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1;
xform -piv 0 0 0 $object;
duplicate -rr;
setAttr ($object + ".scaleX") (-1);
DeleteHistory;
}

</pre>

=== Group each object and rename ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
string $name = ($object);
select $object ;
doGroup 0 1 1;
rename ($name + "_GRP");
}

</pre>

=== Change path in an Attribute ===
<pre>
// Here the Attribute is ".filePrefix" - Select objects first

for ( $object in `ls -sl -l` ) {
string $path = getAttr ($object+".filePrefix");
$path = `substitute "//OLD/PATH/" $path "//NEW/PATH/"`;
setAttr -type "string" ($object+".filePrefix") ($path);
}

</pre>

=== Change opacity mode on V-Ray shaders ===
<pre>
// Select shaders first

for ( $object in `ls -sl -l` ) {
if (attributeExists("omode",$object)) { //check if attribute exists
CBunlockAttr ($object+".omode"); //unlock opacity mode
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 1; //set opacity mode in Clip - 0 pour Normal
}
}

// Alternative
for ( $object in `ls -sl -l` ) {
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") -l false; //unlock attribute if locked
}
if (attributeExists("opacityMode",$object)) {
setAttr ($object+".opacityMode") 2; //set opacity mode in Clip - 0 pour Normal
}
}

</pre>

=== Change color space on selected fileTextures ===
<pre>
// Useful to automatically convert Quixel Megascans by example from sRGB/Raw to ACES color spaces

string $object_selection[] = (`ls -sl`);
for ($object in $object_selection) {
if(`getAttr ($object+".cs")` == "sRGB"){
setAttr ($object + ".cs") -type "string" "Utility - sRGB - Texture";
}
if(`getAttr ($object+".cs")` == "Raw"){
setAttr ($object + ".cs") -type "string" "Utility - Raw";
}
}

</pre>

=== Redshift - custom Tesselation on selected objects ===
<pre>
// Select objects first

for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rsMinTessellationLength") (0.1);
setAttr ($object + ".rsMaxTessellationSubdivs") (2);
setAttr ($object + ".rsOutOfFrustumTessellationFactor") (4);
}

</pre>

=== Change color on selected shaders ===
<pre>
// Select shaders first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".color") -l false;
setAttr ($object + ".color") -type "double3" (0.18) (0.18) (0.18);
}

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Clean Render Layers ===
<pre>
// In MEL
fixRenderLayerOutAdjustmentErrors;

</pre>

=== Change Filter Type on selected Files Textures ===
<pre>
// Select files textures first - 0 means Off
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".filterType") 0;
}

</pre>

=== Select by name ===
<pre>
// Select objects with "toto"
select -r "toto*";

</pre>

=== Display color on shapes ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".displayColors") 1;
setDisplayColorChannelAttribute ($object + ".displayColorChannel");
polyColorPerVertex -r 1 -g 0 -b 0 -a 1 -cdo;
}

</pre>

=== Geometry Constraint on multiple selection ===
<pre>
// Select objects to constrain
string $objectBase = "surfaceName";

for ( $object in `ls -sl -l` ) {
select -cl;
select $objectBase;
select -add $object;
geometryConstraint -weight 1;
select -r "*Constraint*";
doDelete;
}

=== Speed up smokes rendering with V-Ray ===
<pre>
// Select smokes first
for ( $object in `ls -sl -l` ) {
print($object+"\n");
setAttr ($object + ".rendStep") 160;
setAttr ($object + ".shadowStep") 400;
}

</pre>

=== Set bump multiplier on multiple V-Ray shaders ===
<pre>
// Select shaders
for ( $object in `ls -sl -l` ) {
if (attributeExists("bumpMult",$object)) {
setAttr ($object + ".bumpMult") -1; //set bump multiplier at -1
}
}

</pre>

=== STOP/START viewport ===
<pre>
// As seen on https://www.toadstorm.com/. - Put it in your shelf
paneLayout -e -manage false $gMainPane

paneLayout -e -manage true $gMainPane

</pre>

=== Select curves by name ===
<pre>
// Select objects first - Replace "toto" by what you are looking for

select `ls -type "nurbsCurve" "*toto*"`;

</pre>

=== Noise expression ===
<pre>
// Replace "pCube1"

pCube1.translateX=sin(time*20)*0.01*noise(time*10);
pCube1.translateY=sin(time*4)*0.01*noise(time*10);
pCube1.translateZ=sin(time*12)*0.01*noise(time*10);

</pre>

=== V-ray - Make curves renderables ===
<pre>
// Replace VRayLightMtl1 at the end by your material

$selected=`ls -dag -et curveShape`;
for ($object in $selected){
// Add V-ray Extra attributes
vray addAttributesFromGroup $object vray_nurbscurve_renderable 1;
vrayAddAttr $object vraySeparator_vray_nurbscurve_renderable;
vrayAddAttr $object vrayNurbsCurveRenderable;
vrayAddAttr $object vrayNurbsCurveMaterial;
vrayAddAttr $object vrayNurbsCurveTesselation;
vrayAddAttr $object vrayNurbsCurveStartWidth;
vrayAddAttr $object vrayNurbsCurveLockEndWidth;
vrayAddAttr $object vrayNurbsCurveEndWidth;
setUITemplate -pst attributeEditorTemplate;
// Activate renderable
setAttr ($object + ".vrayNurbsCurveRenderable") 1;
// Replace VRayLightMtl1 by your material
connectAttr -force VRayLightMtl1.outColor ($object + ".vrayNurbsCurveMaterial");
}

</pre>

=== Get object type ===
<pre>
// Replace toto with the object whose type you want to know

objectType toto;

</pre>

=== Render layer override on specific object type ===
<pre>
// Replace "Node" by the object type on which you want to act

$selected=`ls -type "Node"`;
for ($object in $selected){
// Create layer override on Primary Visibility attribute on current renderLayer
editRenderLayerAdjustment ($object + ".primaryVisibility");
// Set Primary Visibility - 0 or 1
setAttr ($object + ".primaryVisibility") 0;
}

</pre>

=== V-ray - Make lights invisible ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightSphereShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

$selected=`ls -type "VRayLightDomeShape"`;
for ($object in $selected){
setAttr ($object + ".invisible") 1;
}

</pre>

=== V-ray - Select Rect Light ===
<pre>
select `ls -type "VRayLightRectShape"`;

</pre>

=== V-ray - Rect Lights - Directional Preview - Always for all ===
<pre>
$selected=`ls -type "VRayLightRectShape"`;
for ($object in $selected){
setAttr ($object + ".directionalPreview") 1;
}

</pre>

=== Randomize rotation on selected objects ===
<pre>
// As posted on CGTalk by NaughtyNathan
// "just set the vector values to the maximum random x,y,z rotations you want to apply to the selected transforms."

vector $rndRot = << 0,0,90 >>; // x,y,z rotations
for ($object in `ls -sl -tr`){
rotate `rand ($rndRot.x)` `rand ($rndRot.y)` `rand ($rndRot.z)` $object;
}
</pre>

=== Quit Maya ===
<pre>
// Brute force method

$i = `getpid`; //application ID
system("taskkill /PID " + $i +" /f");

// In a gentle way

evalDeferred("quit -f");
</pre>

=== V-ray - Import list of Alembics through Proxys Import ===
<pre>
// List of Alembics files - Replace by the name of your Alembics
string $alembicsParts[] = {"part1","part2","part3"};

// Replace the PATH of your files - Scale by 100 for Houdini Alembics - <frame04> for sequences
for ($alembicsPart in $alembicsParts){
vrayCreateProxy -node $alembicsPart -existing -dir ("C:/YOURPATH/"+$alembicsPart+".<frame04>.abc") -createProxyNode;
setAttr ($alembicsPart+"_vraymesh.animType") 1;
setAttr ($alembicsPart+".scaleZ") 100;
setAttr ($alembicsPart+".scaleX") 100;
setAttr ($alembicsPart+".scaleY") 100;
}
</pre>

=== V-ray - Change path to VRayMesh for selected proxies ===
<pre>
// Change path with your own .vrmesh
$selected=`ls -type "VRayMesh"`;
for ($object in $selected){
setAttr -type "string" ($object + ".fileName2") "//DISK/PATH/YOUR_VRMESH.vrmesh";
}

// If you want to change Geometry type - 4 for GPU mesh - add following in the loop
// setAttr ($object + ".geomType") 4;
</pre>

=== Delete image planes ===
<pre>
// Delete image plane if exists.
$selected=`ls -type "imagePlane"`;
select $selected;
for ($object in $selected){
doDelete;
}
</pre>

=== Merge alembic from set ===
<pre>
// Select objects in a set called EXPORT_SET
select -r EXPORT_SET ;
timeControl -edit -forceRedraw $gPlayBackSlider;

// Create list of objects from EXPORT_SET
string $assetParts[] = `ls -sl`;
$assetPartsList = stringArrayToString($assetParts," ");

// Merge alembic with these objects
AbcImport -mode import -connect $assetPartsList "//DISK/PATH/alembic.abc";
</pre>

=== Create Texture reference ===
<pre>
// CREATE TEXTURE REFERENCE ON EXPORT SET

select -r YOUR_GROUP ;
CreateTextureReferenceObject;
select -cl ;

// REMOVE REFERENCE OBJECTS FROM EXPORT SET
select -r YOUR_GROUP_reference ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
sets -rm EXPORT_SET $object;
}
select -cl ;
</pre>

=== Replace animated objects with V-Ray proxies ===
<pre>
// First select animated objects to replace
// For each object create a proxy then constrain then bake simulation then delete constraint

for ( $object in `ls -sl -l` ) {
vrayCreateProxy -node assetName -existing -dir ("//DISK/PATH/your_asset.vrmesh") -createProxyNode;
select -r $object ;
select -add assetName ;
doCreateParentConstraintArgList 1 { "0","0","0","0","0","0","0","0","1","","1" };
parentConstraint -weight 1;
bakeResults -simulation true -t "1000:1100" -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {"assetName"};
select `ls -type "constraint"`;
select -add $object ;
doDelete;
select -cl ;
rename "assetName" $object;
}
</pre>

=== Select all meshes in a group ===
<pre>
// From cmadsenAniden on forums.autodesk.com
// Replace group1 by the name of your own group

select -r group1 ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
</pre>

=== Select shot camera ===
<pre>
// CREATE VARIABLE FOR SHOT CAMERA AND SELECT IT

select `ls -type "camera"`;
select -d sideShape frontShape topShape perspShape;
$camerashot = `ls -sl`;
string $shotcamera = $camerashot[0];
print $shotcamera;
select $shotcamera;
</pre>

=== Get list of frames with keys on all transform objects ===
<pre>
$selected=`ls -dag -et transform`;

float $arrathy[] = `keyframe -query $selected`;

float $sorted[] = python("import pymel.core as pm; list(set((pm.getMelGlobal(\"float[]\", \"$arrathy\"))))");
print $sorted;
</pre>

=== MULTI SNAP ===
<pre>
// Replace a list of objects by another with bake of animation. Replace FSTART and FEND with your own padding.

///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/*
Type the command MS() in MEL form to open UI.
*/
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
source "generateChannelMenu.mel";

global proc MS ()
{
global string $sourceObjects;
global string $destinationObjects;

// If the window exists already, delete it.
if (`window -exists multiSnapWindow`)
{
deleteUI multiSnapWindow;
}

// Build the window.
global string $man_window;
string $man_window = `window -title " MULTI SNAP" -sizeable 0 -w 300 multiSnapWindow`;
frameLayout -label "Snap source objects on destination objects.";
rowLayout -width 540 -nc 2 -cw4 10 20 20 100;
// Source objects section
frameLayout -label "Source objects";
$sourceObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addObjects ();" -width 120;
button -label "Remove selected" -command "MS_removeObjects ();" -width 120;
setParent ..;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Remove All" -command "MS_clearObjects ();" -width 240;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "Create" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;
// Destination objects section
frameLayout -label "Destination objects";
$destinationObjects = `textScrollList -width 600 -height 300`;
rowLayout -width 240 -nc 2 -cw2 120 120;
button -label "Add selected" -command "MS_addMM ();" -width 120;
button -label "Remove selected" -command "MS_removeMM ();" -width 120;
setParent ..;
setParent ..;
rowLayout -nc 3;
button -label "SNAP IT" -command "VRAYCONNECDO() " -width 140 -align center;
button -label "Close" -command "DAC_CloseUI() " -width 140 -align center;
setParent ..;
setParent ..;

// Show the window.
showWindow multiSnapWindow;
}

global proc string[] getShaders(string $from)
{
// get the shapes from the input
string $shapes[] = ls("-o", "-dag", "-s", $from);
// give me the connected "shadingEngines"
string $shadingEngines[] = listConnections("-type","shadingEngine", $shapes);
// list the connected materials (shaders) from that
string $materials[] = ls("-mat", listConnections($shadingEngines));
// remove duplicate occurrences.
return (stringArrayRemoveDuplicates($materials));
}

//Add selected objects to list.
global proc MS_addObjects ()
{
global string $sourceObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $sourceObjects;
}
}
}

//Add selected objects to list.
global proc MS_addMM ()
{
global string $destinationObjects;
string $selectedshapes[] = `ls -sl -l`;
//print $selectedshapes;
int $count = 0;

if ($selectedshapes[0] != "")
{
for ($i in $selectedshapes)
{
$count ++;
textScrollList -edit -append $i $destinationObjects;
}
}
}

// Clear objects from list.
global proc MS_clearObjects ()
{
global string $sourceObjects;
textScrollList -e -ra $sourceObjects;
}

// Remove selected object from list.
global proc MS_removeObjects ()
{
global string $sourceObjects;

int $index [] = `textScrollList -query -selectIndexedItem $sourceObjects`;
if ($index [0] != 0)
{
textScrollList -edit -removeIndexedItem $index [0] $sourceObjects;
}
global string $sourceObjects;
}

global proc VRAYCONNECDO()
{
// UI Elements
global string $sourceObjects;
global string $destinationObjects;
// Define user selected objects
string $selected_objects[] = `textScrollList -query -allItems $sourceObjects`;
string $meshMaterial[] = `textScrollList -query -allItems $destinationObjects`;
int $i = 0;

// SET PADDING
string $FSTART = "1";
string $FEND = "100";

print $FSTART;
print $FEND;

string $PADDING = $FSTART + ":" + $FEND;

//Progress bar
global string $gMainProgressBar;

// Start the progress bar and adjust its max value for this operation.
int $steps = size($selected_objects);
progressBar -edit -beginProgress -isInterruptable true -status "Connecting shaders to mesh material ..." -maxValue $steps $gMainProgressBar;

for ($i = 0; $i < size($selected_objects); $i ++)
{
parentConstraint -n parentConstraintMS $selected_objects[$i] $meshMaterial[$i];
select -r $meshMaterial[$i] ;
bakeResults -simulation true -t $PADDING -sampleBy 1 -oversamplingRate 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false -shape true {$meshMaterial[$i]};
select -cl ;
select -r "*parentConstraintMS*";
doDelete;
// Update the progress bar.
progressBar -edit -step 1 $gMainProgressBar;
}
// End the progress.
progressBar -edit -endProgress $gMainProgressBar;
}
</pre>

=== Delete hidden objects ===
<pre>
// Select objects

for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}

</pre>

=== V-Ray - BAKE MATERIALS ===
<pre>
// Made to work also with mayabatch.exe

////////////////////////////////////////////
// BAKE VRAY CUSTOM VARIABLES
////////////////////////////////////////////

// ASSET PATH
string $assetFileType = "mayaBinary";
string $assetPath = "C:/YOUR_PATH/YOUR_SURFACING_ASSET.mb";
string $assetName = "ASSET_NAME";

// LIGHT RIG PATH
string $lightRigFileType = "mayaAscii";
string $lightRigPath = "C:/YOUR_PATH/YOUR_LIGHT_RIG.mb";
string $lightRigName = "DAY_LIGHTING";

// BAKED TEXTURES PATH
string $bakedTexturesPath = ("C:/YOUR_PATH/BAKED_TEXTURES/" + $assetName + "_" + $lightRigName + "_Bake");
print $bakedTexturesPath;

// SET RESOLUTION FOR BAKED MAPS
$resWidth = 4096;
$resHeight = $resWidth;

// COLOR SPACE FOR FILE TEXTURES
string $fileColorSpace = "ACES - ACEScg";

////////////////////////////////////////////
// END OF CUSTOM VARIABLES
////////////////////////////////////////////

////////////////////////////////////////////
// RENDER SETTINGS

// Set File Name Prefix
setAttr -type "string" vraySettings.fileNamePrefix "<Scene>/<Layer>/<Camera>_<Layer>_<Scene>";

// Set resolution
$resWidthHalf = $resWidth/2;
$resHeightHalf = $resHeight/2;
setAttr "vraySettings.width" $resWidthHalf;
setAttr "vraySettings.height" $resHeightHalf;

// Set Persp camera renderable
setAttr "perspShape.renderable" 1;

// Set Image format
setAttr -type "string" "vraySettings.imageFormatStr" "exr (multichannel)";

// Set Animation type on Standard
setAttr "vraySettings.animType" 0;
setAttr "vraySettings.animBatchOnly" 1;

// Sampler type Bucket
setAttr "vraySettings.samplerType" 4;

// Min Shading Rate
//setAttr "vraySettings.minShadeRate" 4;
setAttr "vraySettings.minShadeRate" 7;

// Buckets subdivs
//setAttr "vraySettings.dmcMinSubdivs" 1;
//setAttr "vraySettings.dmcMaxSubdivs" 8;
//setAttr "vraySettings.dmcThreshold" 0.1;
setAttr "vraySettings.dmcMinSubdivs" 1;
setAttr "vraySettings.dmcMaxSubdivs" 15;
setAttr "vraySettings.dmcThreshold" 0.01;

// Color mapping Linear
setAttr "vraySettings.cmap_type" 0;

// GI on
setAttr "vraySettings.giOn" 1;
//setAttr "vraySettings.subdivs" 400;
setAttr "vraySettings.subdivs" 1000;

// Max subdivs
setAttr "vraySettings.ddisplac_maxSubdivs" 16;

// Cache geometry and bitmaps
setAttr "vraySettings.globopt_cache_geom_plugins" 1;
setAttr "vraySettings.globopt_cache_bitmaps" 1;

// Dynamic memory limit
setAttr "vraySettings.sys_rayc_dynMemLimit" 0;

////////////////////////////////////////////
// IMPORT

// IMPORT LIGHT RIG
file -import -type $lightRigFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $lightRigPath;

// IMPORT ASSET
file -import -type $assetFileType -ignoreVersion -mergeNamespacesOnClash false -rpr ":" -options "v=0;" $assetPath;

// CREATE SETS
select `ls -type "mesh"`;
sets -name "assetOriginal_Set" ;
duplicate -rr;
group -w -n ("GRP_" + $assetName + "_BAKE_" + `toupper $lightRigName`);
sets -name "assetBaked_Set" ;

// REMOVE BAKED PARTS FROM ORIGINAL PARTS SET
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
for ( $object in `ls -sl -l` ) {
sets -rm assetOriginal_Set $object;
}
select -cl ;

// DELETE HIDDEN OBJECTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
$vis = getAttr ($object+".visibility");
if ($vis == 0){
select -r $object ;
doDelete ;
}
}
select -cl ;

// fixShapeName - Thanks to Pinkwerks
global proc
fixShapeName()
{
string $me = "fixShapeName";
string $shape;
string $newShapeName;
string $parent;
string $tmpA[];
string $selectedShapes[] = `ls -sl -l`;
int $sizeOfShapes = `size $selectedShapes`;

if ( $sizeOfShapes == 0 )
error($me + " : Nothing shapes to process!");

for ( $shape in $selectedShapes )
{
$tmpA = `listRelatives -p $shape`;
$parent = $tmpA[0];
$newShapeName = ($parent + "Shape");
rename $shape $newShapeName;
}
}

// APPLY FIXSHAPENAME TO BAKED ASSET PARTS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
pickWalk -d down;
fixShapeName();
select -cl ;

// DELETE OBJECTS WITHOUT UVS
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl` ) {
int $vertexCount[] = `polyEvaluate -uv $object`;
print $vertexCount;
string $uvCount = $vertexCount[0];
if ($uvCount == 0){
select -r $object ;
doDelete ;
}
}

// CREATE VRAY BAKE OPTIONS
createNode "VRayBakeOptions" -n "vrayBakeOptions";
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
$selected=`ls -sl`;
for ($object in $selected){
sets -edit -forceElement vrayBakeOptions $object ;
}

// HIDE ORIGINAL ASSET
select -r assetOriginal_Set ;
pickWalk -d up;
hide `ls -sl`;

// BAKE VRAY OPTIONS
setAttr "vrayBakeOptions.udimBaking" 1;
setAttr "vrayBakeOptions.resolutionX" $resWidth;

optionVar -intValue "vrayBakeType" 2;
optionVar -intValue "vraySkipNodesWithoutBakeOptions" 1;
optionVar -intValue "vrayAssignBakedTextures" 1;
optionVar -stringValue "vrayBakeOutputPath" $bakedTexturesPath;
optionVar -intValue "vrayBakeProjectionBaking" 0;

// GO BAKE GO
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
select -r $polyGons;
for ( $object in `ls -sl -l` ) {
vrayStartBake;
}
select -cl ;

// UV TILING UDIM AND ACES CG FOR FILES
for ( $object in `ls -type "file"` ) {
setAttr ($object + ".filterType") 0;
setAttr ($object + ".uvTilingMode") 3;
setAttr ($object + ".cs") -type "string" $fileColorSpace;
}

// CONNECT SHADERS
select -cl ;
select -r assetBaked_Set ;
string $selection[] = `ls -sl`;
string $polyGons[] = `filterExpand -sm 12 $selection`;
for ( $object in $polyGons ) {
string $shadingGroupName = ($object + "Shape_bakedmtlSG");
sets -e -forceElement $shadingGroupName $object;
}
select -cl ;

///////////////////////////////////
// SAVE
file -rename ("C:/YOUR_PATH/BAKED_ASSETS/" + $assetName + "_" + $lightRigName + "_BAKE_DEBUG.mb");
file -f -save;

</pre>

=== Arnold - Set all Standins display on Bouding box ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 0;
}
</pre>

=== Arnold - Set all Standins display on Point cloud ===
<pre>
$selected=`ls -type "aiStandIn"`;
for ($object in $selected){
setAttr ($object + ".mode") 4;
}
</pre>

=== Alembic - Loop animation on all nodes ===
<pre>
$selected=`ls -type "AlembicNode"`;
for ($object in $selected){
setAttr ($object + ".cycleType") 1;
}
</pre>

=== Mental Ray nodes error - Delete Mayatomr plugin ===
<pre>
unknownPlugin -remove "Mayatomr";
</pre>

=== Delete Unknown nodes ===
<pre>
select -r `ls -type unknown`;
delete;
</pre>

=== Write text ===
<pre>
string $exampleFileName = ( "D:/yolo.bat" );
string $linesToWrite[] = {
"youpi",
"youhou"
};
int $result = fwriteAllLines($exampleFileName,$linesToWrite);
</pre>

=== Point Lock No Attach on selected follicles ===
<pre>
for ( $object in `ls -sl -l` ) {
setAttr ($object + ".pointLock") 0;
}
</pre>

=== Convert .ma cameras from Reality Capture into .abc files ===
<pre>
// List of assets
string $fileParts[] = {"asset_001", "asset_002"};

// Replace the PATH of your files
for ($filePart in $fileParts){
string $fileName = $filePart + "_cam";
string $filePath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.ma";
file -import -type "mayaAscii" -ignoreVersion -ra true -mergeNamespacesOnClash false -rpr $fileName -options "v=0;p=17;f=0" -pr -importFrameRate true -importTimeRange "override" $filePath;
select -cl;
select `ls -type "imagePlane"`;
pickWalk -d up;
doDelete;
select `ls -type "camera"`;
pickWalk -d up;
string $abcPath = "//DISK/PATH/" + $filePart + "/" + $filePart +"_cam.abc";
string $abcExp = "-frameRange 1 1 -uvWrite -worldSpace -dataFormat ogawa -root |* -file " + $abcPath;
AbcExport -j $abcExp;
select -all;
doDelete;
}
</pre>

=== Unitize UVs (one square UV by face) ===
<pre>
// Select objects
for ( $object in `ls -sl -l` ) {
select -r ($object+".e[*]");
hilite ($object+".e[*]") ;
polyMapCut -ch 1 ($object+".e[*]");
polyForceUV -unitize $object;
}
</pre>

Houdini learning

2023-09-25T17:23:21Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

=== Gets the digits from node name===
<pre>
// Add `padzero(3,opdigits("."))`
// Add `padzero(3,opdigits(".."))` for previous node padding
</pre>

Maya Mel

2023-09-25T15:29:46Z

Walter:

Houdini learning

2023-09-19T15:05:18Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Labs Maps Baker - Bake with UDIMs ===
<pre>
// Add %(UDIM)d in the file path - don't need to check Output UDIMs
</pre>

Reality Capture

2023-09-12T15:21:13Z

Walter:

=Reality Capture=
=== Process multiple scans===
<pre>
// Create a first .bat with the list of the assets you want to process - One folder by asset, all in the same directory

set list=asset_001 asset_002 asset_003 asset_004 asset_005 asset_006 asset_007

(for %%a in (%list%) do (
set assetName=%%a
set Images=\\DISK\PATH\%%a
call \\DISK\PATH\exec_RC.bat
))

// Create a second .bat to run Reality Capture - take a look on Reality Capture documentation

set RealityCaptureExe="C:\Program Files\Capturing Reality\RealityCapture\RealityCapture.exe"
set ScriptFolder=%~dp0
set SimplifySettings=%ScriptFolder%SimplifySettings25.xml
set ModelSettings=%ScriptFolder%ModelSettings.xml
set PtcSettings=%ScriptFolder%PtcSettings.xml
set RegSettings=%ScriptFolder%RegistrationSettings.xml
set projectRoot=%Images%\..\
set outputDir=%projectRoot%\OUT\%assetName%
mkdir %outputDir%
set undistoDir=%outputDir%\undistos
mkdir %undistoDir%
set Model=%outputDir%\%assetName%.obj
set Project=%outputDir%\%assetname%.rcproj
set PTC=%outputDir%\%assetname%.xyzrgb

%RealityCaptureExe% -addFolder %Images% ^
-selectAllImages ^
-setPriorLensGroup 2 ^
-align ^
-selectMaximalComponent ^
-setReconstructionRegionAuto ^
-calculateNormalModel ^
-simplify %SimplifyTo% %SimplifySettings% ^
-selectMarginalTriangles ^
-removeSelectedTriangles ^
-selectLargeTrianglesRel 12 ^
-removeSelectedTriangles ^
-renameSelectedModel %assetName% ^
-calculateTexture ^
-save %Project% ^
-exportModel %assetName% %Model% %ModelSettings% ^
-exportRegistration %mayaScene% %newRegSettings%^
-exportSparsePointCloud %PTC% %PtcSettings% ^
-clearCache ^
-quit

</pre>

=== Texture reprojection - Open project/Import new model/Texture/Export for a list===
<pre>
// Create a first .bat with the list of the assets you want to process

set list=asset_001 asset_002 asset_003 asset_004 asset_005 asset_006 asset_007

(for %%a in (%list%) do (
set assetName=%%a
set originalProject=\\DISK\PATH\%%a.rcproj
set meshPath=\\DISK\PATH\%%a.obj
))

// Create a second .bat to run Reality Capture - take a look on Reality Capture documentation

</pre>

Reality Capture

2023-09-12T15:16:59Z

Walter: /* Process multiple scans */

=Reality Capture=
=== Process multiple scans===
<pre>
// Create a first .bat with the list of the assets you want to process - One folder by asset, all in the same directory

set list=asset_001 asset_002 asset_003 asset_004 asset_005 asset_006 asset_007

(for %%a in (%list%) do (
set assetName=%%a
set Images=\\DISK\PATH\%%a
call \\DISK\PATH\exec_RC.bat
))

// Create a second .bat to run Reality Capture - take a look on their documentation

set RealityCaptureExe="C:\Program Files\Capturing Reality\RealityCapture\RealityCapture.exe"
set ScriptFolder=%~dp0
set SimplifySettings=%ScriptFolder%SimplifySettings25.xml
set ModelSettings=%ScriptFolder%ModelSettings.xml
set PtcSettings=%ScriptFolder%PtcSettings.xml
set RegSettings=%ScriptFolder%RegistrationSettings.xml
set projectRoot=%Images%\..\
set outputDir=%projectRoot%\OUT\%assetName%
mkdir %outputDir%
set undistoDir=%outputDir%\undistos
mkdir %undistoDir%
set Model=%outputDir%\%assetName%.obj
set Project=%outputDir%\%assetname%.rcproj
set PTC=%outputDir%\%assetname%.xyzrgb

%RealityCaptureExe% -addFolder %Images% ^
-selectAllImages ^
-setPriorLensGroup 2 ^
-align ^
-selectMaximalComponent ^
-setReconstructionRegionAuto ^
-calculateNormalModel ^
-simplify %SimplifyTo% %SimplifySettings% ^
-selectMarginalTriangles ^
-removeSelectedTriangles ^
-selectLargeTrianglesRel 12 ^
-removeSelectedTriangles ^
-renameSelectedModel %assetName% ^
-calculateTexture ^
-save %Project% ^
-exportModel %assetName% %Model% %ModelSettings% ^
-exportRegistration %mayaScene% %newRegSettings%^
-exportSparsePointCloud %PTC% %PtcSettings% ^
-clearCache ^
-quit

</pre>

Reality Capture

2023-09-12T15:14:23Z

Walter:

Reality Capture

2023-09-12T15:12:20Z

Walter:

Reality Capture

2023-09-12T15:11:08Z

Walter: Created page with "=Reality Capture= === Process multiple scans=== <pre> // Create a first .bat with the list of the assets you want to process - One folder by asset, all in the same directory..."

Main Page

2023-09-12T15:08:40Z

Walter:

Nuke Misc

2023-07-12T09:53:25Z

Walter:

=Compositing Misc=
=== CMY IDs selection ===
<pre>
// Use with Expression node

cyan
g*b-r

magenta
r*b-g

yellow
r*g-b

blue
b-(g+r)

green
g-(b+r)

red
r-(g+b)

</pre>

=== Fix Exposure variations ===
<pre>
// First calculate Avg Intensities of the zone which needs to be fixed with a CurveTool, then use the value in gain of a ColorCorrect

(1/(parent.CurveTool1.intensitydata))*CUSTOM_VALUE

Adjust Custom value in order to reach 1

</pre>

=== Time in seconds ===
<pre>
// Thx Reddit

[expr floor([frame]/[value root.fps])]

</pre>

Houdini learning

2023-06-29T12:47:35Z

Walter:

=Houdini learning=
=== Center Pivot ===
<pre>
// In Pivot Translate in a Transform node

centroid(0,0)
centroid(0,1)
centroid(0,2)

</pre>

=== Delete by Connectivity attribute ===
<pre>
// In a Delete node, in Group (by example)

@class=7777

</pre>

=== Increase Volume Density ===
<pre>
// In a volumewrangle

@density *= 10;

</pre>

=== Substract any VDB by another VDB ===
<pre>
// In a volumewrangle

if (volumesample(1,"surface",@P)<0)@density=0;

//inverse:

if (volumesample(1,"surface",@P)>0)@density=0;

</pre>

=== Get bound & centroid ===
<pre>
// In a null object

bbox(opinputpath('.',0),D_XSIZE)
bbox(opinputpath('.',0),D_YSIZE)
bbox(opinputpath('.',0),D_ZSIZE)

centroid(opinputpath('.',0),D_X)
centroid(opinputpath('.',0),D_Y)
centroid(opinputpath('.',0),D_Z)

</pre>

=== UVs ===
<pre>
// In this order : uvautoseam - uvflatten - uvlayout
In uvflatten : Seams = seams
</pre>

=== Kill emission on a smoke source after frame 300 ===
<pre>
if (@Frame>300) @density = 0;
</pre>

=== Attribfrommap - Use UDIMs images ===
<pre>
// Replace 1001 by <UDIM> and check UDIM Filename Expansion
</pre>

=== Attribwrangle - Udim number on primitives attributes ===
<pre>
// In a wrangle set on Primitives
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
</pre>

=== Place at World center, scale et re-transform for export ===
<pre>
// In a transform translates
-centroid(0,0) -centroid(0,1) -centroid(0,2)
// In a transform Uniform scale
(bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE))

// At end, in a transform Uniform scale
1/((bbox("/obj/neigeSol/timeshift1/", D_ZSIZE))/(bbox("/obj/neigeSol/transform_centerWorld/", D_ZSIZE)))
</pre>

=== Misc Attr Wrangle expressions ===
<pre>
// Delete by color
if (@Cd.x<chf("seuilColor"))removepoint(0,@ptnum);

// Set random pscale
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Udim attr for each Udim
vector uv = primuv(0, "uv", @primnum, set(0.5, 0.5, 0));
i@udim = 1001 + int(uv.x) + int(uv.y)*10;
// Next, with a Delete SOP: Group: @udim=$F - Pattern mode !*

// Set pscale Min/Max
@pscale = fit01(pow(rand(@ptnum), ch("power")), ch("pscale_min"), ch("pscale_max"));

// Remove small parts - In a Foreach connected piece loop
@size = (getbbox_size(0).x+getbbox_size(0).y+getbbox_size(0).z);

if(@size < chf("taille"))
removepoint(geoself(), @ptnum);

// Set @variant integer for Copytopoints (change objects number)
i@variant =floor(rand(@id)*3);

//// Get position difference between two objects, and match animation
// On Rest pose object:
v@fixe = 0;
@fixe.x = getbbox_center(0).x;
@fixe.y = getbbox_center(0).y;
@fixe.z = getbbox_center(0).z;
// On animated object:
v@anim = 0;
@anim.x = getbbox_center(0).x;
@anim.y = getbbox_center(0).y;
@anim.z = getbbox_center(0).z;
// After two previous AttrWrangles:
v@anim_offset = point(0, 'fixe', 1) - point(1, 'anim', 1);
// To match animation:
@P = point(0, "P", @ptnum) + point(1, 'anim_offset', 1);

//// Blend shape through a mask attribute - Posted by Cudarsjanis on Odforce
// Geo with mask attribute in first input, blend shape in second
v@P=lerp(v@P, point(1,'P',@ptnum), f@mask*ch('blend'));

//// Set a fixed normal attribute
v@z = set(0,1,0);

//// Place at world center
v@P -= getbbox_center(0);
</pre>

=== Delete small pieces ===
<pre>
// As seen on Sidefx forum, posted by paulboiii
// First create a measure SOP, set to per piece

// Then, in an attribwrangle set on primitives
float threshold = chf("Size_Threshold");
if ( f@area < threshold ) removeprim(0,@primnum,1);
</pre>

=== Attribute Wrangle - Copy attribute from second input ===
<pre>
// With same number of points on both inputs - From Bonsak on Sidefx.com

// Copy P from second input
@P = v@opinput1_P;
</pre>

=== Bounding-box - Position Reference color ===
<pre>
// As seen on https://houdinihelp.ru/ref/expression_cookbook.html

// In an attribwrangle set on primitives
@Cd.r = relbbox(0,@P).x;
@Cd.g = relbbox(0,@P).y;
@Cd.b = relbbox(0,@P).z;
</pre>

=== Group by uv.y ===
<pre>
// Thanks to https://vfxbrain.wordpress.com/2019/06/14/vex-snippets-2/

// In an attribwrangle set on points
if(@uv.y<chf("seuil")) @group_base = 1;

// ALTERNATIVE
@uv.x<0.2
</pre>

=== Specify attribute value for one point ===
<pre>
if (@ptnum == 322) f@mask=1;
</pre>

=== Pscale by Bbox Y ===
<pre>
//set pscale first

f@bboxY = relbbox(0,@P).y;
@pscale *= chramp("rampBbox",@bboxY)*4 ;
</pre>

=== Delete primitives by height ===
<pre>
if ( @P.y<chf("seuil") ) removeprim(0,@primnum,1);
</pre>

=== Falloff geometry ===
<pre>
// Get camOrigin

vector pt0 = point(1,'P',0);
v@raydir = normalize( pt0 - @P )*-1;

@falloff = dot(v@raydir, @N);

// Promote raydir in Primitives

if ( f@falloff>chf("seuil") ) removeprim(0,@primnum,1);
</pre>

Houdini learning

2023-04-11T13:36:00Z

Walter:

Houdini learning

2023-03-27T14:31:31Z

Walter:

Houdini learning

2023-03-16T09:39:16Z

Walter: /* Houdini learning */

Houdini learning

2023-02-03T11:26:51Z

Walter: /* Attribwrangle - if... */

Houdini learning

2023-02-03T10:09:29Z

Walter:

Windows

2022-12-06T17:35:37Z

Walter:

=Windows=
=== Convert with Ffmpeg - .wav folder to .mp3===
<pre>
// Lots of tricks here: https://berniebernie.fr/wiki/Windows_batch

cd C:\folder
for %f in (*.wav) do ( ffmpeg -i "%f" -q:a 2 "%~nf.mp3" )

</pre>

Windows

2022-12-06T17:35:31Z

Walter: /* Convert with Ffmpeg */

=Windows=
=== Convert with Ffmpeg - .wav folder to .mp3===
<pre>
// Lots of tricks here: https://berniebernie.fr/wiki/Windows_batch
cd C:\folder
for %f in (*.wav) do ( ffmpeg -i "%f" -q:a 2 "%~nf.mp3" )

</pre>