Adjacency to index buffer from trimesh

Using Cinder
2

Hi,

a TriMesh, by default, is not really suitable for that kind of thing. It only supports GL_TRIANGLES, meaning that for each triangle there are 3 indices in the index buffer. There is no adjacency information available, because this is not stored in an OBJ file, anyway.

The way I see it you have 2 options:

  1. Create your own mesh from scratch.
  2. Parse the TriMesh one triangle at a time and try to reconstruct adjacency info from it. If two triangles share two vertices, you know they are adjacent to each other. Then build a new index buffer and set the primitive type to GL_TRIANGLES_ADJACENCY.

-Paul