[vtkusers] Determining if a point is inside or outside a closed surface

[Dominik Szczerba]

I am not aware of a ready to use vtk method. the fastest way is to build 
a list of surface element bounding boxes and - if your surface is closed 
- shoot just one ray, locate intersection candidates, and count real 
intersections (even/odd = outside/inside). If you implement it be sure 
to post it :)
DS

Doug McCorkle wrote:
> Hello,
>      What is the fastest method to determine if a point is inside or 
> outside a closed surface? I have tried the celllocator and the obbtree 
> but both seem to take a little while. Is there a better method to 
> determine the inside/outside calculation? Are the previous two methods 
> highly dependent on the configuration parameters? If so is the automatic 
> setting pretty good at determining good parameters for a broad range of 
> datasets? Thanks for the help.
> 
> Doug
> 
> Doug McCorkle - Research Assistant
> Iowa State University
> Virtual Engineering Research Group
> 
> 
> 
> 
> 
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-- 
Dominik Szczerba, Ph.D.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi