Kévin Dietrich
9d9f2f1a03
This uses the recently introduced evaluator's vertex data to smoothly interpolate original coordinates instead of using linear interpolation. The orcos are interpolated at the same time as positions and as such, the specific subdivision routine for the orco extractor has been removed. The patch evaluation shader uses a definition to enable code specific to orco evaluation. Since the orco layer may not have been requested on first render, and since orco data is now stored in the OpenSubDiv evaluator, the evaluator needs to be recreated if an orco layer is suddenly available. For this, a callback to check if the evaluator has the data was added. This is added to the evaluator as the `Subdiv` cache stored in the modifier is invalidated less often than the Mesh batch cache and so leads to fewer evaluator recreations. Differential Revision: https://developer.blender.org/D14999