RotateManipulator.setInitialRotation not working with rotateOrder

[jmreinhart]

I have a custom transform node that has an offset rotation attribute (similar to the joint orient attribute). I'm working on a custom rotationManipulator to work with it. I'm using the standard rotateManip but using callback methods to connect the plug and manipulator so that I can take into account the offset). This is working perfectly in XYZ rotation order, but when I switch to another one, the setInitialRotation method gives unexpected results.

It seems as though it expects the input rotation to be XYZ. If that's the case then I just need to convert my rotation from whatever order it has to XYZ but keep the same end orientation. How can I do that?

[jmreinhart]

MMatrix resultMatrix = (rotateQuat).asMatrix();
MTransformationMatrix mt(resultMatrix);
double resRot[3];
MTransformationMatrix::RotationOrder mtRotateOrder;
mtRotateOrder = MTransformationMatrix::kXYZ;
mt.getRotation(resRot, mtRotateOrder);
MGlobal::displayInfo(MString("initX:") + resRot[0]);
MGlobal::displayInfo(MString("initY:") + resRot[1]);
MGlobal::displayInfo(MString("initZ:") + resRot[2]);
mtRotateOrder = MTransformationMatrix::kYZX;
mt.getRotation(resRot, mtRotateOrder);
MGlobal::displayInfo(MString("initX:") + resRot[0]);
MGlobal::displayInfo(MString("initY:") + resRot[1]);
MGlobal::displayInfo(MString("initZ:") + resRot[2]);

So I thought that this method would work but no matter what value I assign to "mtRotateOrder" it always gets an XYZ rotation. 

[jmreinhart]

mtRotateOrder = MTransformationMatrix::kZYX;
mt.reorderRotation(mtRotateOrder);
mt.getRotation(resRot, mtRotateOrder);

MGlobal::displayInfo(MString("initX:") + resRot[0]);
MGlobal::displayInfo(MString("initY:") + resRot[1]);
MGlobal::displayInfo(MString("initZ:") + resRot[2]);

I also tried this method but no matter what rotateOrder I chose to convert to it always worked when the object was in XYZ mode but not in any other mode.

[jmreinhart · Accepted solution]

So it turns out that when you are in object mode rotation you should setInitialRotation using an EulerRotation with the same rotateOrder as your object. Seems obvious, I was getting weird results in my tests because I didn't realize the plugToManipCallback was being called.