[vtkusers] Unwrap a cylinder of data using vtkCylindricalTransform and vtkImageReslice

David Gobbi david.gobbi at gmail.com
Thu Dec 18 10:40:44 EST 2014

On Thu, Dec 18, 2014 at 8:17 AM, Vincent32160 <vsh at magellium.fr> wrote:
> As I need to modify the angle from which the unrolling is starting I would
> use the sophisticated solution you advise.
> If I understand correctly the starting reslice axes are a 4x4 matrix
> (-1,0,0,center[0],0,-1,0,center[1],0,0,1,center[2],0,0,0,0).
> If I need to apply an angle, I could use only the 3x3 matrix
> (-1,0,0,0,-1,0,0,0,1).
> Can you tell me if I am right?
> Thanks

Yes, the 3x3 matrix controls the orientation of the cylinder, and
the final column is where you want the center to be.

However: the bottom row should always be (0,0,0,1).  And I'm
not sure why you put in the "-1"s.  Is there a reason why you want
to rotate by 180 degrees?

 - David
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