Sergey Sharybin
b0c6c65e7b
This commit makes it so OpenSubdiv's topology refiner is kept in memory and reused for until topology changes. There are the following modifications which causes topology refiner to become invalid: - Change in a mesh topology (for example, vertices, edges, and faces connectivity). - Change in UV islands (adding new islands, merging them and so on), - Change in UV smoothing options. - Change in creases. - Change in Catmull-Clark / Simple subdivisions. The following limitations are known: - CPU evaluator is not yet cached. - UV islands topology is not checked. The UV limitation is currently a stopper for making this cache enabled by default.