I want to surface along the lines.

I have 2 vertexlist data.
First, It is vertices of the surface.
Second, It is vertices of the line.

fitst yellow line is surface.
second yellow line is the line the surface follows.

I want to
like blue shape mesh.

What shoud I do?

This is the start of an amazing tutorial series on mesh generation.

If you’ve already got the vert data this should be everything you need