Common between 2 faces


I need to check if two faces have a common area. Currently, I explore the faces of my solid commoning each in turn with the test face and use

TopoDS_Shape s = c.Shape();
GProp_GProps System;
GProp_GProps* gprops = new GProp_GProps();
BRepGProp::SurfaceProperties(s, *gprops);

to test if mass > 0. However, the result is frequently zero when the two faces overlap. My question is do I have to set a Cascade precision variable in order to do a common between two faces?

Many thanks,


chenzaigao's picture

have you solved the problem??can you give me a simple example ??

Evgeny Lodyzhehsky's picture

About how to use GProp_GProps etc., please, see Draw command "sprops" for details.