Edge split/swap
Edge split –
- Same procedure as collapse, using the submesh to be star({i,j}; K). Initial value of vh be ½(vi+vj).
Edge swap-
- For a swap that replace an edge {i,j} with {k,l}, choose the best of the two optimizations, one with submesh star({k};K’) varying vertex vk, another with submesh star({l};K’) varying vertex vl.