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Fix several correctness issues where the new OBJ/MTL importer was not producing the same results as the old one, mostly because the code for some reason had slightly different logic. Fixes T97757: - When .obj file tries to use a material that does not exist, the code was continuing to use the previous material, instead of creating new default one, as the previous importer did. - Previous importer was always searching/parsing "foo.mtl" for a "foo.obj" file, even if the file itself does not contain "mtllib foo.mtl" statement. One file from T97757 repros happens to depend on that, so resurrect that behavior. - When IOR (Ni) or Alpha (d) are not specified in .mtl file, do not wrongly set -1 values to the blender material. - When base (Kd) or emissive (Ke) colors are not specified in the .mtl file, do not set them on the blender material. - Roughness and metallic values used by viewport shading were not set onto blender material. - The logic for when metallic was set to zero was incorrect; it should be set to zero when "not using reflection", not when "mtl file does not contain metallic". - Do not produce a warning when illum value is not spelled out in .mtl file, treat as default (1). - Parse illum as a float just like python importer does, as to not reintroduce part of T60135. Reviewed By: Howard Trickey Differential Revision: https://developer.blender.org/D14822
.. 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 General 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.