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mr_pivot_bakeAveragePivot.mel
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mr_pivot_bakeAveragePivot.mel
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// ------------------------------------------------------------------------------------------------------------------------------------------------
// SCRIPT: bakeAveragePivot
// VERSION: 0008
//
// CREATORS: Maria Robertson
// CREDIT: Daniel Fotheringham
// -------------------------------------------------------------------
//
// DESCRIPTION:
// Based on Daniel Fotheringham's demo: https://youtu.be/MjYXR0Ts1sE?t=3087 at 51:27 - 54:00
//
// Bake objects in the parent space of a worldspace pivot.
// Makes it easier to clean curves when travelling in different directions.
//
// e.g. if a character travels diagonally in a straight line, the movement is represented in trans x and z axis.
// But if baked inside a pivot pointing in the same direction, it will be represented by just trans z.
//
// -------------------------------------------------------------------
//
// RUN COMMAND:
// BakeAverageLocator() ;
//
// INSTRUCTIONS:
// This scripts works differently depending when it is run and what is selected at the time. It has 3 phases.
//
// PHASE 1 - CREATE THE PIVOT:
// If it doesn't already exist, create a locator to be the pivot.
// - If nothing is selected, the pivot will be created at origin.
// - If one or more objects are selected, the pivot will be created at the average position and orientation that
// the object/s are travelling in, between the current and next frame.
//
// PHASE 2 - SELECT OBJECTS TO BE PIVOTED:
// If TEMP_PIVOT_loc exists with no children, create baked offset locators inside the pivot
// for each selected object.
//
// Position TEMP_PIVOT_loc as wanted.
//
// PHASE 3 - BAKE EVERYTHING CONNECTED TO THE PIVOT:
// If TEMP_PIVOT_loc contains children, bake the originally selected objects to offset, and delete the pivot.
//
// -------------------------------------------------------------------
//
// RESEARCH THAT HELPED:
// Why current time didn't work - https://forums.cgsociety.org/t/using-getattr-t-to-do-time-delay/805166/2
//
// WISH LIST:
// - Save control keys + tangents, and apply it to the bake
// - Delete redundant keys
//
// ------------------------------------------------------------------------------------------------------------------------------------------------
//////////////////////////////////////////////////////////////////////////
// -------------------------------------------------------------------- //
// //
// CREATE A WORLDSPACE PIVOT //
// //
// -------------------------------------------------------------------- //
//////////////////////////////////////////////////////////////////////////
// ------------------------------------------------------------------------------------------------------------------------------------------------
global proc BakeAverageLocator() {
// -------------------------------------------------------------------
// 01. INITIALIZE VARIABLES
// -------------------------------------------------------------------
// initialize strings
string $sel[] = `ls -sl` ;
string $pivotLocators[] ;
string $averagePivot = "averagePivot_loc" ;
string $averagePivotOffset = "averagePivot_loc_offset" ;
// declare time range
float $startTime = `playbackOptions -q -min`;
float $endTime = `playbackOptions -q -max`;
// -------------------------------------------------------------------
// 01. IF averagePivot_loc ALREADY EXISTS
// -------------------------------------------------------------------
if (`objExists $averagePivot`) {
string $pivotChildren[] = `listRelatives -c $averagePivot` ;
// -------------------------------------------------------------------
// 02. IF TEMP PIVOT HAS CHILDREN, BAKE THE ORIGINAL TARGETS AND DELETE PIVOT
// -------------------------------------------------------------------
if (size ($pivotChildren) > 1) {
select $pivotChildren ;
FindConstraintTargets ;
// bake and delete connections
refresh -suspend 1 ;
bakeResults -simulation true -t ($startTime+":"+$endTime) -sampleBy 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false ;
delete -sc ;
filterCurve ;
delete -cn ;
refresh -suspend 0 ;
delete $averagePivot ;
}
else {
// -------------------------------------------------------------------
// 03. GIVE ERROR IF NOTHING SELECTED
// -------------------------------------------------------------------
// give error if nothing is selected
if (size($sel) == 0){
// reminds you to select something //
// make sure -title is unique, otherwise dialog won't trigger
confirmDialog -title "Error A" -message "Select object/s to pivot. \n" ;
}
// -------------------------------------------------------------------
// 03. RUN SCRIPT ON EACH SELECTED OBJECT
// -------------------------------------------------------------------
// for each control selected
for ($item in $sel) {
// -------------------------------------------------------------------
// 04. GIVE ERROR IF TEMP PIVOT IS SELECTED
// -------------------------------------------------------------------
// if selected item is temp pivot
if ($item == $averagePivot) {
confirmDialog -title "Error B" -message ("Select object/s to pivot. \n") ;
// end For Loop
break ;
}
// -------------------------------------------------------------------
// 04. SET-UP OFFSET LOCATORS
// -------------------------------------------------------------------
else {
// create a locator
spaceLocator -p 0 0 0 -n ($item + "_pivot_loc") ;
// add locator to $pivotLocators array
$pivotLocators[size($pivotLocators)] = ($item + "_pivot_loc") ;
// match position and orientation of new locator to temp pivot
pointConstraint $averagePivot ($item + "_pivot_loc") ;
orientConstraint $averagePivot ($item + "_pivot_loc") ;
// delete any connections / delete constraints
delete -cn;
// make locator bigger
setAttr ($item + "_pivot_loc.localScaleX") 18 ;
setAttr ($item + "_pivot_loc.localScaleY") 18 ;
setAttr ($item + "_pivot_loc.localScaleZ") 18 ;
// constrain controls to the offset locators
pointConstraint $item ($item + "_pivot_loc") ;
orientConstraint -mo $item ($item + "_pivot_loc") ;
// place offset locator inside temp pivot
parent ($item + "_pivot_loc") $averagePivot ;
}
// -------------------------------------------------------------------
// 04. BAKE OFFSET LOCATORS
// -------------------------------------------------------------------
// bake pivot locators
select $pivotLocators;
// bake and delete connections
refresh -suspend 1 ;
bakeResults -simulation true -t ($startTime+":"+$endTime) -sampleBy 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false ;
delete -sc ;
filterCurve ;
delete -cn ;
refresh -suspend 0 ;
// give $i value of 0. If size of $pivotLocators is greater than 0, increase $i value by 1
// and run script
for ($i=0; $i < `size $pivotLocators`; $i++) {
pointConstraint $pivotLocators[$i] $sel[$i] ;
orientConstraint -mo $pivotLocators[$i] $sel[$i] ;
}
select $averagePivot ;
}
}
}
// -------------------------------------------------------------------
// 01. IF $averagePivot DOES NOT EXIST
// -------------------------------------------------------------------
// if $averagePivot doesn't exist
else {
// -------------------------------------------------------------------
// 02. IF ONE OR MORE OBJECTS ARE SELECTED
// -------------------------------------------------------------------
// if something is selected
if (size ($sel) != 0) {
// create string from the last item selected
select $sel ;
string $lastInSelected[0] = `ls -sl -tail 1` ;
// create locator
spaceLocator -p 0 0 0 -n $averagePivot ;
// create null parent for $averagePivot
group -n $averagePivotOffset ;
// set locator scale
setAttr ($averagePivot + ".localScaleZ") 100 ;
setAttr ($averagePivot + ".localScaleX") 100 ;
setAttr ($averagePivot + ".localScaleY") 100 ;
// average position and rotation of averagePivotOffset between selected
for ($item in $sel) {
pointConstraint $item $averagePivotOffset ;
orientConstraint $item $averagePivotOffset ;
}
// bake and delete connections
refresh -suspend 1 ;
bakeResults -simulation true -t ($startTime+":"+$endTime) -sampleBy 1 -disableImplicitControl true -preserveOutsideKeys true -sparseAnimCurveBake false -removeBakedAttributeFromLayer false -removeBakedAnimFromLayer false -bakeOnOverrideLayer false -minimizeRotation true -controlPoints false ;
delete -sc ;
filterCurve ;
delete -cn ;
refresh -suspend 0 ;
// select $averagePivot
select $averagePivot
print "Run mr_BakeWorldspacePivot again when ready, to baked selected objects under the pivot.\n" ;
}
// -------------------------------------------------------------------
// 02. IF NOTHING IS SELECTED
// -------------------------------------------------------------------
// if nothing is selected
else {
// create $averagePivot locator
warning("No temp pivot locator exists. Creating one now.") ;
// create locator
spaceLocator -p 0 0 0 -n $averagePivot ;
// set locator scale
setAttr ($averagePivot + ".localScaleZ") 100 ;
setAttr ($averagePivot + ".localScaleX") 100 ;
setAttr ($averagePivot + ".localScaleY") 100 ;
select $averagePivot ;
}
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
// -------------------------------------------------------------------- //
// //
// SUPPORTING PROCEDURES //
// //
// -------------------------------------------------------------------- //
//////////////////////////////////////////////////////////////////////////
// ------------------------------------------------------------------------------------------------------------------------------------------------
proc FindConstraintTargets() {
string $queryTargets[] = `ls -sl`;
// declare all constraint connections on selected
string $connections[] = `listConnections -type "constraint" $queryTargets` ;
// remove duplicate listings
$connections = stringArrayRemoveDuplicates($connections) ;
// find the parent of each connection
string $targets[] = `listRelatives -p $connections` ;
// remove duplicate listings
$targets = stringArrayRemoveDuplicates($targets) ;
if (size($targets) == 0 ) {
print "No targets found. \n" ;
}
else {
select $targets ;
}
}