VTK : Find The Boundary Of Projected Points

I want to find the boundary of all projected points which are computed from the points on the 3D model. The red arrow in the following image represents the projected vector. I will project the original points on the 3D model to a plane.

VTK : Cut Volume By Plane

cut a volume by a plane and display the cut section. The left renderer contains the original volume object, and the right renderer shows the cross section in the window.

VTK – Set Clipping Range For Camera

I create two renderers that show the same 3D model. Make the camera in the right renderer linkage with the left one's, that means we can get the same view in the right renderer when we modify the status of the camera of the left renderer. Here is all information of implementations.

A prohibited operation