I think it would be more accurate to use one of the methods that pulls the
Euler rotation from a matrix like Ryan and Judd suggested.
import math
import maya.OpenMaya as mApi
def getOrient(normal, tangent, ro=0):
kRotateOrders = [mApi.MEulerRotation.kXYZ, mApi.MEulerRotation.kYZX,
mApi.MEulerRotation.kZXY, mApi.MEulerRotation.kXZY,
mApi.MEulerRotation.kYXZ, mApi.MEulerRotation.kZYX,]
cross = [normal[1]*tangent[2] - normal[2]*tangent[1],
normal[2]*tangent[0] - normal[0]*tangent[2],
normal[0]*tangent[1] - normal[1]*tangent[0]]
tMatrix = normal+[0]+tangent+[0]+cross+[0,0,0,0,1]
mMatrix = mApi.MMatrix()
mApi.MScriptUtil.createMatrixFromList(tMatrix, mMatrix)
tmMatrix = mApi.MTransformationMatrix(mMatrix)
rotate = tmMatrix.eulerRotation().reorder(kRotateOrders[ro])
RAD_to_DEG = (180/math.pi)
return [rotate[0]*RAD_to_DEG, rotate[1]*RAD_to_DEG,
rotate[2]*RAD_to_DEG]
getOrient([1,0,0], [0,1,0], ro=0)
On Wed, Feb 25, 2009 at 5:55 AM, ugly bob <[email protected]> wrote:
>
>
> interesting. in the interest of ease of use i m gonna stick with the
> quaternion work around. interesting bug. i m trying to get the euler
> rotations, from a translate vector i think? that is to transform a
> torus to the rotation of a face, via queried facenormal values. its
> all good now though. spent ages wrapping that mel script but the API
> goodness comes through again! hurrah !
> >
>
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http://groups.google.com/group/python_inside_maya
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