f1 = faces[2]
f2 = faces[0]
# face opposite to f2
-f2opp = faces[1]
+f2opp = geompy.GetOppositeFace( box, f2 )
# Get vertices used to specify how to associate sides of faces at projection
[v1F1, v2F1] = geompy.SubShapeAll(f1, geompy.ShapeType["VERTEX"])[:2]
src_mesh.Segment().NumberOfSegments(9,10)
src_mesh.Quadrangle()
src_mesh.Hexahedron()
-src_mesh.Triangle(f1) # triangular sumbesh
+src_mesh.Triangle(f1) # triangular sub-mesh
src_mesh.Compute()