Reading IGES files
I'm a new user of Opencascade, and i need some help...
I have an IGES file using NURBS representing a surface and i need to calculate the normal vectors to the surface on different points.
I thought to find in OpenCascade source code how the file is read, and modify it using the points coordinates to compute normal vectors.
My problem is I didn't understood how OpenCascade read coordinates of the points and draw polygons.
Someone can help me?
Or if anybody knows an other solution for this problem, i'm opened to any suggestion.
Thanks for reading, and sorry for my english, I don't speak very well.