<string><html><head/><body><p>Midpoint subdivision algorithm</p><p>With every step, the set of vertices is replaced with by the midpoints of all current edges. Then, two sets of faces are created to set up the new connectivity: From all midpoints of edges surrounding an original face, a new face is created. Also, for all midpoints of edges surrounding an original vertex, a new face is created<br/></p><p><span style=" font-weight:600;">Note: This algorithm is best suited for closed meshes since boundaries tend to fragment into isolated faces after a few iterations!</span></p></body></html></string>