TopoShapeWire is the OpenCasCade topological wire wrapper Offset the shape by a given ammount Add an edge to the wire Make this and the given wire homogenous to have the same number of edges Make a pipe by sweeping along a wire. Make a loft defined by profiles along a wire. Approximate B-Spline-curve from this wire Returns the center of mass of the current system. If the gravitational field is uniform, it is the center of gravity. The coordinates returned for the center of mass are expressed in the absolute Cartesian coordinate system.