[vtkusers] Hidden Surface Removal And return vtkPolyData struct

[Quang Tran]

Hi David, 

I think your example only used to extract the outer surface by using
vtkPolyDataConnectivityFilter with a seed  point when there are many
surfaces combined into a vtkPolyData. 

My problem is have to remove hidden surface and return the result as a
vtkPolyData. I think in this case I should use a perspective transform or
use BSP tree. But now I don't know exactly how to implement this (don't use
z-buffer here). 

I need a vtk Filter with input is a vtkPolyData and a view point; output is
also a vtkPolyData with hidden surface removed. 

Thank you very much and hope have more solutions. 

/Quang. 


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