[vtkusers] Orthographic projection onto arbitrary plane

[smurphy]

Hello, 

I am (desperately) trying to make an orthographic projection in a plane of a
geometry (see picture attached). 
The only help I can find online is this thread so I am replying to this old
post. 
I tried to do the following code but without success. It simply place the
camera in the correct position but does not actually make the
transformation. Am I missing a line, should I pass the transform to the
camera in a certain way? 
Thanks a lot, 
Sebastien 

#center of the geometry volume is 0,0, -500 
FocalPoint=[0,0,-500] 
Position=[0,0,-500] 
ViewUp=[0,0,-500] 
Transform=vtk.vtkPerspectiveTransform() 
Transform.SetupCamera(Position, FocalPoint, ViewUp) 
Transform.Ortho(-1000,1000,-1500,1500,-500,500) 
<http://vtk.1045678.n5.nabble.com/file/t342442/Screen_Shot_2018-05-31_at_16.png> 



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