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None Mapping points on a surface to indices 

Forum: Geometry
Date: 26 May, 2008
From: Giuseppe Vacanti <Giuseppe Vacanti>

Hello, I am writing an X-ray tracer in GEANT4. I am at the point where I would like to map points on the surface of a solid to two indices so that local surface properties can be looked up on a point-by-point basis.

This smells like NURBS ((u,v)<->(x,y,z) mapping), but I understand that NURBS are not really implemented (by the way, can the base class G4NURBS be used?).

I have looked into BREPS, which seem to offer a more complete set of solids (at least those I need), but I do not see a way to do what I want (probably there isn't one).

Does anyone have any suggestions/pointers or working on an application with similar needs?

Thanks, Giuseppe

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1 None: Re: Mapping points on a surface to indices   (John Apostolakis - 27 May, 2008)
(_ None: Re: Mapping points on a surface to indices   (Giuseppe Vacanti - 27 May, 2008)
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