|Message: Mapping points on a surface to indices||Not Logged In (login)|
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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?
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