void MayaTransformWriter::pushTransformStack(const MFnTransform & iTrans,
bool iForceStatic)
{
// inspect the translate
addTranslate(iTrans, "translate", "translateX", "translateY", "translateZ",
Alembic::AbcGeom::kTranslateHint, false, iForceStatic, false, mSample,
mAnimChanList);
// inspect the rotate pivot translate
addTranslate(iTrans, "rotatePivotTranslate", "rotatePivotTranslateX",
"rotatePivotTranslateY", "rotatePivotTranslateZ",
Alembic::AbcGeom::kRotatePivotTranslationHint, false,
iForceStatic, false, mSample, mAnimChanList);
// inspect the rotate pivot
addTranslate(iTrans, "rotatePivot", "rotatePivotX", "rotatePivotY",
"rotatePivotZ", Alembic::AbcGeom::kRotatePivotPointHint,
false, iForceStatic, false, mSample, mAnimChanList);
// inspect rotate names
MString rotateNames[3];
rotateNames[0] = "rotateX";
rotateNames[1] = "rotateY";
rotateNames[2] = "rotateZ";
unsigned int rotOrder[3];
// if this returns false then the rotation order was kInvalid or kLast
MTransformationMatrix::RotationOrder eRotOrder(iTrans.rotationOrder());
if (util::getRotOrder(eRotOrder, rotOrder[0], rotOrder[1],
rotOrder[2]))
{
addRotate(iTrans, "rotate", rotateNames, rotOrder,
Alembic::AbcGeom::kRotateHint, iForceStatic, false,
mSample, mAnimChanList, mRotateOpIndex);
}
// now look at the rotation orientation, aka rotate axis
rotateNames[0] = "rotateAxisX";
rotateNames[1] = "rotateAxisY";
rotateNames[2] = "rotateAxisZ";
rotOrder[0] = 0;
rotOrder[1] = 1;
rotOrder[2] = 2;
addRotate(iTrans, "rotateAxis", rotateNames, rotOrder,
Alembic::AbcGeom::kRotateOrientationHint, iForceStatic, false,
mSample, mAnimChanList, mRotateAxisOpIndex);
// invert the rotate pivot if necessary
addTranslate(iTrans, "rotatePivot", "rotatePivotX", "rotatePivotY",
"rotatePivotZ", Alembic::AbcGeom::kRotatePivotPointHint,
true, iForceStatic, false, mSample, mAnimChanList);
// inspect the scale pivot translation
addTranslate(iTrans, "scalePivotTranslate", "scalePivotTranslateX",
"scalePivotTranslateY", "scalePivotTranslateZ",
Alembic::AbcGeom::kScalePivotTranslationHint, false, iForceStatic,
false, mSample, mAnimChanList);
// inspect the scale pivot point
addTranslate(iTrans, "scalePivot", "scalePivotX", "scalePivotY",
"scalePivotZ", Alembic::AbcGeom::kScalePivotPointHint, false,
iForceStatic, false, mSample, mAnimChanList);
// inspect the shear
addShear(iTrans, iForceStatic, mSample, mAnimChanList);
// add the scale
addScale(iTrans, "scale", "scaleX", "scaleY", "scaleZ", false,
iForceStatic, false, mSample, mAnimChanList);
// inverse the scale pivot point if necessary
addTranslate(iTrans, "scalePivot", "scalePivotX", "scalePivotY",
"scalePivotZ", Alembic::AbcGeom::kScalePivotPointHint, true,
iForceStatic, false, mSample, mAnimChanList);
// remember current rotation
if (mFilterEulerRotations)
{
double xx(0), yy(0), zz(0);
// there are 2 rotation order enum definitions:
// MEulerRotation::RotationOrder = MTransformationMatrix::RotationOrder-1
if (getSampledRotation( mSample, mRotateOpIndex, xx, yy, zz ))
{
mPrevRotateSolution.setValue(xx, yy, zz, (MEulerRotation::RotationOrder)(eRotOrder-1));
}
if (getSampledRotation( mSample, mRotateAxisOpIndex, xx, yy, zz ))
{
mPrevRotateAxisSolution.setValue(xx, yy, zz, MEulerRotation::kXYZ);
}
}
}
// Creates an AnimChannel from a Maya compound attribute if there is meaningful
// data. This means we found data that is non-identity.
//
// returns true if we extracted an AnimChannel and false otherwise (e.g., the
// data was identity).
static bool
_GatherAnimChannel(
XFormOpType opType,
const MFnTransform& iTrans,
MString parentName,
MString xName, MString yName, MString zName,
std::vector<AnimChannel>* oAnimChanList,
bool isWritingAnimation,
bool setOpName)
{
AnimChannel chan;
chan.opType = opType;
chan.isInverse = false;
if (setOpName) {
chan.opName = parentName.asChar();
}
// We default to single precision (later we set the main translate op and
// shear to double)
chan.precision = UsdGeomXformOp::PrecisionFloat;
unsigned int validComponents = 0;
// this is to handle the case where there is a connection to the parent
// plug but not to the child plugs, if the connection is there and you are
// not forcing static, then all of the children are considered animated
int parentSample = PxrUsdMayaUtil::getSampledType(iTrans.findPlug(parentName),false);
// Determine what plug are needed based on default value & being
// connected/animated
MStringArray channels;
channels.append(parentName+xName);
channels.append(parentName+yName);
channels.append(parentName+zName);
GfVec3d nullValue(opType == SCALE ? 1.0 : 0.0);
for (unsigned int i = 0; i<3; i++) {
// Find the plug and retrieve the data as the channel default value. It
// won't be updated if the channel is NOT ANIMATED
chan.plug[i] = iTrans.findPlug(channels[i]);
double plugValue = chan.plug[i].asDouble();
chan.defValue[i] = opType == ROTATE ? GfRadiansToDegrees(plugValue) : plugValue;
chan.sampleType[i] = NO_XFORM;
// If we allow animation and either the parentsample or local sample is
// not 0 then we havea ANIMATED sample else we have a scale and the
// value is NOT 1 or if the value is NOT 0 then we have a static xform
if ((parentSample != 0 || PxrUsdMayaUtil::getSampledType(chan.plug[i], true) != 0) &&
isWritingAnimation) {
chan.sampleType[i] = ANIMATED;
validComponents++;
}
else if (!GfIsClose(chan.defValue[i], nullValue[i], 1e-7)) {
chan.sampleType[i] = STATIC;
validComponents++;
}
}
// If there are valid component, then we will add the animation channel.
// Rotates with 1 component will be optimized to single axis rotation
if (validComponents>0) {
if (opType == SCALE) {
chan.usdOpType = UsdGeomXformOp::TypeScale;
} else if (opType == TRANSLATE) {
chan.usdOpType = UsdGeomXformOp::TypeTranslate;
// The main translate is set to double precision
if (parentName == "translate") {
chan.precision = UsdGeomXformOp::PrecisionDouble;
}
} else if (opType == ROTATE) {
chan.usdOpType = UsdGeomXformOp::TypeRotateXYZ;
if (validComponents == 1) {
if (chan.sampleType[0] != NO_XFORM) chan.usdOpType = UsdGeomXformOp::TypeRotateX;
if (chan.sampleType[1] != NO_XFORM) chan.usdOpType = UsdGeomXformOp::TypeRotateY;
if (chan.sampleType[2] != NO_XFORM) chan.usdOpType = UsdGeomXformOp::TypeRotateZ;
}
else {
// Rotation Order ONLY applies to the "rotate" attribute
if (parentName == "rotate") {
switch (iTrans.rotationOrder()) {
case MTransformationMatrix::kYZX:
chan.usdOpType = UsdGeomXformOp::TypeRotateYZX;
break;
case MTransformationMatrix::kZXY:
chan.usdOpType = UsdGeomXformOp::TypeRotateZXY;
break;
case MTransformationMatrix::kXZY:
chan.usdOpType = UsdGeomXformOp::TypeRotateXZY;
break;
case MTransformationMatrix::kYXZ:
chan.usdOpType = UsdGeomXformOp::TypeRotateYXZ;
break;
case MTransformationMatrix::kZYX:
chan.usdOpType = UsdGeomXformOp::TypeRotateZYX;
break;
default: break;
}
}
}
}
else if (opType == SHEAR) {
chan.usdOpType = UsdGeomXformOp::TypeTransform;
chan.precision = UsdGeomXformOp::PrecisionDouble;
}
else {
return false;
}
oAnimChanList->push_back(chan);
return true;
}
return false;
}
void MayaTransformWriter::pushTransformStack(double iFrame,
const MFnTransform & iTrans)
{
bool forceStatic = (iFrame == DBL_MAX);
// inspect the translate
addTranslate(iTrans, "translate", "translateX", "translateY", "translateZ",
Alembic::AbcGeom::kTranslateHint, false, forceStatic, mSample,
mAnimChanList);
// inspect the rotate pivot translate
addTranslate(iTrans, "rotatePivotTranslate", "rotatePivotTranslateX",
"rotatePivotTranslateY", "rotatePivotTranslateZ",
Alembic::AbcGeom::kRotatePivotTranslationHint, false,
forceStatic, mSample, mAnimChanList);
// inspect the rotate pivot
addTranslate(iTrans, "rotatePivot", "rotatePivotX", "rotatePivotY",
"rotatePivotZ", Alembic::AbcGeom::kRotatePivotPointHint,
false, forceStatic, mSample, mAnimChanList);
// inspect rotate names
MString rotateNames[3];
rotateNames[0] = "rotateX";
rotateNames[1] = "rotateY";
rotateNames[2] = "rotateZ";
unsigned int rotOrder[3];
// if this returns false then the rotation order was kInvalid or kLast
if (util::getRotOrder(iTrans.rotationOrder(), rotOrder[0], rotOrder[1],
rotOrder[2]))
{
addRotate(iTrans, "rotate", rotateNames, rotOrder,
Alembic::AbcGeom::kRotateHint, forceStatic, false,
mSample, mAnimChanList);
}
// now look at the rotation orientation, aka rotate axis
rotateNames[0] = "rotateAxisX";
rotateNames[1] = "rotateAxisY";
rotateNames[2] = "rotateAxisZ";
rotOrder[0] = 0;
rotOrder[1] = 1;
rotOrder[2] = 2;
addRotate(iTrans, "rotateAxis", rotateNames, rotOrder,
Alembic::AbcGeom::kRotateOrientationHint, forceStatic, false,
mSample, mAnimChanList);
// invert the rotate pivot if necessary
addTranslate(iTrans, "rotatePivot", "rotatePivotX", "rotatePivotY",
"rotatePivotZ", Alembic::AbcGeom::kRotatePivotPointHint,
true, forceStatic, mSample, mAnimChanList);
// inspect the scale pivot translation
addTranslate(iTrans, "scalePivotTranslate", "scalePivotTranslateX",
"scalePivotTranslateY", "scalePivotTranslateZ",
Alembic::AbcGeom::kScalePivotTranslationHint, false, forceStatic,
mSample, mAnimChanList);
// inspect the scale pivot point
addTranslate(iTrans, "scalePivot", "scalePivotX", "scalePivotY",
"scalePivotZ", Alembic::AbcGeom::kScalePivotPointHint, false,
forceStatic, mSample, mAnimChanList);
// inspect the shear
addShear(iTrans, forceStatic, mSample, mAnimChanList);
// add the scale
addScale(iTrans, "scale", "scaleX", "scaleY", "scaleZ", forceStatic,
mSample, mAnimChanList);
// inverse the scale pivot point if necessary
addTranslate(iTrans, "scalePivot", "scalePivotX", "scalePivotY",
"scalePivotZ", Alembic::AbcGeom::kScalePivotPointHint, true,
forceStatic, mSample, mAnimChanList);
}