Extract the boundary loops of an indexed triangle mesh as ordered arrays of
vertex indices. A boundary edge is one used by a single triangle, so the
loops include both the outer outline and any internal hole rings. Useful for
outlining a mesh or relaxing/snapping only its rim vertices.
Extract the boundary loops of an indexed triangle mesh as ordered arrays of vertex indices. A boundary edge is one used by a single triangle, so the loops include both the outer outline and any internal hole rings. Useful for outlining a mesh or relaxing/snapping only its rim vertices.