Introduction - If you have any usage issues, please Google them yourself
This is the script for the rhino, first select a surface, then select a set of curves, then this set of curves selected from the world' s surface by the uv coordinates projected onto the surface, while preserving the original World Z coordinates. (Usually selected surface are parallel to the xy plane, which would allow a set of curves in the xy direction, the shape of the uv by surface modification)