[vtkusers] Polygon Intersection with vtkPolyData

[ѧ־ Ñî]

Hi everyone, I am quite new to VTK. I am trying to do polygon intersection 
detection and extract the area which overlaps and reconstruct the 
overlapping part into a new polygon. The information of polygons is stored 
in vtkPolyData, I have written an algorithm to detect intersection and 
reconstruct new polygon. However, it doesn't work. Since I am quite new to 
vtk, I might make some mistakes. The question is as polygon infomation is 
stored in vtkPolyData, do I need to use vtkCutter to cut through with a 
vtkPlane to get 2D data? I didn't do this and straightaway extract the 
point(vtkPoints) in vtkPolyData and compare them. If I did this, can I still 
store the data in vtkPolyData just as the point z value is zero? I dun know 
whether I confuse you guys, if I didn't make myself clear, please let me 
know. Please do help me and I really appreciate. The main problem I have 
really is lack of information of VTK. The documentation is a bit hard for me 
to understand sometimes and not sufficient information : (... Thanks for 
everyone

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