[vtkusers] about transform vtkTransform to itkTransform

[yxliu at fudan.edu.cn]

Hi,

I have a 4x4 vtkMatrix, which represents a 3D affine transform. Now I 
need to transform it into itkCenterAffineTransform. I did it as below.

Set the 3x3 matrix of vtkMatrix to the 9 parameters of  
itkCenterAffineTransform
Set the translation of vtkMatrix to 10th, 11th and 12th parameters
Set the center of itkCenterAffineTransform to (0,0,0)

Is correct?

Regards,

Yixun Liu