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The issue was that the deps graph relation builder assumed that all bones that had a IK constraint on them would be evaluated. However for targetless IK bones, only the active bone would receive updates and the others would be skipped (as those would be treated as if the IK constraint was disabled). I didn't see an easy way to solve this from the depsgraph side of things. Instead I came up with a solution that I feel is quite strait forward and reflects what is actually supposed to happen under the hood. Now all targetless IK constraints are treated as disabled and will not be added to any relations in the depsgraph. Instead, a temporary IK constraint will be created when the bone in question is transformed. This is basically activating "Auto IK" for the bone while transforming. Reviewed By: Sergey, Brecht Differential Revision: http://developer.blender.org/D7378
.. Keep this document short & concise, linking to external resources instead of including content in-line. See 'release/text/readme.html' for the end user read-me. Blender ======= Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing. .. figure:: https://code.blender.org/wp-content/uploads/2018/12/springrg.jpg :scale: 50 % :align: center Project Pages ------------- - `Main Website <http://www.blender.org>`__ - `Reference Manual <https://docs.blender.org/manual/en/latest/index.html>`__ - `User Community <https://www.blender.org/community/>`__ Development ----------- - `Build Instructions <https://wiki.blender.org/wiki/Building_Blender>`__ - `Code Review & Bug Tracker <https://developer.blender.org>`__ - `Developer Forum <https://devtalk.blender.org>`__ - `Developer Documentation <https://wiki.blender.org>`__ License ------- Blender as a whole is licensed under the GNU Public License, Version 3. Individual files may have a different, but compatible license. See `blender.org/about/license <https://www.blender.org/about/license>`__ for details.