bd801e7a68
This commit makes the motion path calculations use the new Depsgraph Filtering API to obtain a more streamlined copy of the full scene dependency graph, allowing for faster calculations (as less data needs to be evaluated for each frame being baked). For example, in 01_020_A.anim.blend from the Spring production files, the time needed to calculate paths on several bones on Autumn went from 39.84 seconds (!) down to 9.90 seconds! Currently, this works by just replacing the depsgraph instance passed to the motion path calculation function. This filtered instance contains just the ID's needed to evaluate the graph to evaluate a specified target (i.e. the Object owning the pose). Notes: * By default, the filtering is not performed unless debug mode 555 is activated. Having a debug switch here allows comparing performance and disabling it should thing it start crashing. * It is necessary to pass in the original Scene instance (not the COW one owned by the filtered depsgraph), otherwise changing the current frame had no effect, due to the COW flushing from original Scene to the new Scene overwriting the CFRA changes we make. * The code here still needs cleaning up to debugging instrumentation, etc. and also to optimise further (e.g. caching the filtered depsgraph for faster updates when animating on existing paths, or fine-tuning the exact set of nodes needed). I'm just committing this first, since this was the quickly hacked-together test code I've been using to check that this is all working. * Further improvements could also be made to the time needed to build the full graph instance (about 3.3 sec), by allowing partial builds (e.g. by making a filtering proxy/wrapper around existing builders)