Child Prim Rotation Calculation

[Leroy Voorhees]

I'm not sure if this is the right forum but I am putting together an eternal program to export prims to 3dsMax and as part of that I need to get the rotation of the prims so that the objects can be imported in to 3dsMax. When I get the rotation of a child prim it is in relation to the rotation of the root prim. I need to convert this rotation to world coordinates and this is giving me a little bit of trouble. I have tried calculating this by multiplying the child prim rotation by the root prim rotation but the resulting rotation is not correct. What am I overlooking here?

[Dora Gustafson]

You may overlook that the order of the arguments are important.
RotationA*RotationB is not the same as RotationB*RotationA

And of course the rotations are represented as quarternions:smileywink:

[Leroy Voorhees]

Thank you. I didn't think about order of operation. When I reversed it I am getting the expected results.