[vtkusers] Normal of a point

[tony hakki]

Hi;
I want to get normal vector of point around a cell/polygon in my  vtk class, and I will have some points on that normal vector, and also I will get those points density values. How can I obtain these with VTK (c++), Does anybody have a such kind of example? It is very important for me. I hope somebody will help me. 
Thank a lot.

Tony


 
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