forked from bartvdbraak/blender
eb016eb3ae
The issue was caused by the render engine loading edit mesh, which re-allocates mesh array which might be referenced by other object's derived meshed. Worst thing about this is that updating render engine happens from the end of scene update function, after all the objects are updated and so. This is needed so render engine gets the update objects which is correct. The only proper way to solve the issue is to make it so viewport engine does not leave objects in inconsistent state, meaning nobody will reference to freed data. In order to reach this we do edit mesh loading before running objects update so all the objects which uses that mesh will have proper references in the derived mesh. This also solves old creepyness which happened before when having single object in edit mode. tweaking it will calculate derived mesh as a part of scene update, then this derived mesh will be freed by edit mesh loading and viewport will be creating derived mesh again. Now render engine is expected to do nothing with meshes which are in edit mode, but they still need to load edit data for non0meshes. It's not really easy to do from the BKE level because needed functions are implemented in the editor. Thanks Campbell for the review! Differential Revision: https://developer.blender.org/D697 |
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