[vtkusers] vtkTransform question

[Kiran, P (CORP, GEITC)]

Hi all:

I tried to test "GetOrientation()" method of vtkTranform as following:

1) set the vtkMatrix4x4 
2) set the matrix in step as input to vtkTransform's SetMatrix method
3) get the orientation matrix using Getorientation() method.
                                    
These are results:              
I set the input 4x4 matrix for vtkTransform as: (  using SetMatrix() method)
   0.999245	 -0.0173388   0.0347622   0 ;
   0.0124273       0.990517     0.136826     0;
   0.036805        0.136291     -0.989985    0;
   0                        0                0                1; 
and I got the orientation as:  {7.83328, -177.871, -1.00284}

I just want to know the reverse process is correct or not, so  I tried the
following:
1)  Set this orienataion matrix as input to vtkTransform ( using
RotateX(),RotateY(),RotateZ() methods )
2) Get the 4x4 Matrix, which is a result of this orienatation.

The resulting 4x4 matrix is:
      -0.999157     -0.01749   -0.0371516    0 ;
      -0.0224014    0.990428  0.136197      0 ;
      0.0344139     0.136914   -0.989985    0 ;
      0                     0               0                1 ;

There are some small discrepancies in the signs of the input and output
matrices.
Can someone, through some light on this.
I am including the test file as an attachment.

Thanks 
Kiran
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 <<test_vtkTransform.cxx>> 



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