DirectX question. How to draw isolines of a three-dimensional model?

Question

Programming

There is a three-dimensional model, for example:

Model example

It is necessary to make cuts and draw isolines along them, for example:

Contour example

What is the best way to do this?

The model is built "by triangles" - D3DPT_TRIANGLELIST
DirectX version - 9

Answer 1

Maybe this will help a little habrahabr.ru/post/141881/