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How to know if 2 faces are parallel ?

HASANI Kreshnik's picture


I want to know if 2 faces are parallel or nor ?

I tryed this on 2 faces which are parallel (BSplineSurfaces), but it desn't work :

BRepExtrema_ExtFF brepextff(myFace1,myFace2);

if ((brepextff.IsParallel()) && (brepextff.IsDone())) {...}

Do someone has an idea ?

Thanks in advance.