723e129252
* Adds two new python handlers: scene_update_pre() and scene_update_post() These run before and after Blender does a scene update on making modifications to the scene. * Datablocks now have an is_updated property. This will be set to true in the above callbacks if the datablock was tagged to be updated. This works for the most common datablocks used for rendering: object, material, world, lamsp, texture, mesh, curve. * Datablock collections also have an is_updated property. If this is set, it means one datablock of this type was added, removed or modified. It's also useful as a quick check to avoid looping over all datablocks. * RenderEngine.view_update() can also check these properties, for interactive viewport rendering. http://wiki.blender.org/index.php/Dev:2.6/Source/Render/UpdateAPI