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Surface parameters

Other usage issuesMon, 09/15/2008 - 15:463 replies

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QuestionAuthorMon, 09/15/2008 - 15:46

Hi,
Is it possible to get parameters from position? (reverse of Value(u,v))

Thanks
Author

Discussion

3 archived replies

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01Commenter-1Mon, 09/15/2008 - 15:55

Hi Author,

I use the followin code:

...
double pU, pV;
Handle(Geom_Surface) surface = BRep_Tool::Surface(face);
...
GeomAPI_ProjectPointOnSurf projection( gp_Pnt(x, y, z), surface);

if(projection.NbPoints() > 0)
{
if(projection.LowerDistance() < Precision::Confusion() )
{
projection.LowerDistanceParameters(pU, pV);

}
else
;//your message here
}

Commenter-1

02Commenter-2Mon, 09/15/2008 - 16:00

Two ways:
1. The class GeomAPI_ProjectPointOnSurf.
2. The class ShapeAnalysis_Surface, method ValueOfUV, it tries to do its best to get the result when the previous way fails.

03AuthorMon, 09/15/2008 - 16:37

Thanks, that was great help