[vtkusers] vtk 4x4 matrix and quaternions

[Emmanouil Moschidis]

Hello 

I am getting from a tracking system coordinates from a pointer in x,y,z format and 
orientation in space in quaternions. Now I want to import this information to vtk. I have seen that vtkMath class supports the conversion from quaternions to 3x3 rotation matrices, but my question is the following:
 the 4x4 transformation matrices in VTK present the information about rotation in angles? (then of course the transformation from quaternions to angles is necessary) 

Thanks

       
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