As we know, according to the parameter vector(u, v), it is easy to get the coordinate of point in the surface(Geom_Surface::Value()). Inversely, if we have known the coordinate(x, y, z) of point in the surface, how to get the parameter vector (u, v)? Is there any API for that? Thanks.
By the way, I want to calculate the differential geometric property, such as normal vector, curvature and so on. So I think I should get the parameter vector(u, v) firstly, and then can use GeomLProp_SLProps to calculate them.