[vtkusers] 3D surface to 2D silhouette

[Lars Friedrich Lars]

Hello,

I would like to project the silhouette of a 3D surface (e.g. a sphere) onto an arbitrary 2D plane in space following a specified projection geometry (e.g. the geometry of the active camera).
I thought that the class vtkPolyDataSilhouette does exactly this. After some experiments with this class I recognized that the silhouette generated by this class lies not on a plane, it is still 3D.
Is there a way of implementing this behavior?

regards,
lars
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