Alexander Gavrilov
6a59e12364
The bug is caused by problems in the dependency graph. Unfortunately, fixing is not just a matter of fixing the graph, because correct dependencies would cause a cycle here and in other reasonable use cases. The real fix thus requires refactoring Spline IK to require curve data only in the actual evaluation phase, and not in POSE_INIT_IK. In addition, this separates the normal bone evaluation loop from Spline IK computations for two reasons: - That still needs to be done even if spline IK can't evaluate due to missing curve data. - It should reduce issues with induced shearing, as Spline IK now controls how parent-child relations are handled in the chain, and can take care to only carry over rotation and location.