[vtkusers] PolyData actor is invisible after applying scale(1, 1, -1)

[zlf]

Hi all,

I place a cube polydata actor in renderer and reset camera. It is visible.
But after applying scale (1,1,-1) to actor and reset camera, the actor is
invisible.

            vtkTransform transform = new vtkTransform();
            transform.SetMatrix(viewMatrix);
            transform.Scale(1, 1, -1);
            cubeActor2.SetUserTransform(transform);

How to make it visible?

Regards,

zlf



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