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Avoid the evaluation of constraints when computing the parent-inverse matrix. Constraints are meant to be evaluated last; object transforms are computed this order: 1. `parent->obmat` (the parent object's world matrix) 2. `ob->parentinv` (the object's parent-inverse matrix) 3. Object's loc/rot/scale 4. Object's constraint evaluation When the constraints are used to compute the parent-inverse matrix, their effect is moved from step 4 to step 2 in this list, potentially rotating or scaling the object's local transform. This causes unwanted movement as reported in T82156. Reviewed By: looch Differential Revision: https://developer.blender.org/D9413
.. 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.