rotate object in relation of sth. else

[farshizzo]

You can use the matrix.preEuler methods to rotate objects relative to arbitrary coordinate frames. Here is how you would roll object1 relative to object2's coordinate frame:

m = object2.getMatrix()
m.preEuler(0,0,1)
object1.setQuat(m.getQuat())

You would use similar code to perform the rotation relative to the viewpoint by retrieving the matrix from the viz.MainView object.

Let me know if I misunderstood your question or you need more specific examples.