Normal at given point on surface of solid

[EmJay276]

Hi,

I have several given points on the surface of an arbitrary solid.

Is there an easier way to get the surface normals at these points than

• Looping over every face of the solid
• Using GeomAPI_ProjectPointOnSurf() to project the point (that is already on one of the surfaces) onto the current surface
• To check if the projected point GeomAPI_ProjectPointOnSurf.Point() is the original point == its the surface he is lies on
• To get the (u, v) coords of the point via GeomAPI_ProjectPointOnSurf.LowerDistanceParameters()
• To then use BRepGProp_Face()
• To get the normal via BRepGProp_Face.Normal(u, v)

This seams a bit overkill to me...