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This patch adds evaluation for NURBS, Bezier, and Catmull Rom curves for the new `Curves` data-block. The main difference from the code in `BKE_spline.hh` is that the functionality is not encapsulated in classes. Instead, each function has arguments for all of the information it needs. This makes the code more reusable and removes a bunch of unnecessary complications for keeping track of state. NURBS and Bezier evaluation works the same way as existing code. The Catmull Rom implementation is new, with the basis function based on Cycles code. All three types have some basic tests. For NURBS and Catmull Rom curves, evaluating positions is the same as any generic attribute, so it's implemented by the generic interpolation to evaluated points. Bezier curves are a bit special, because the "handle" control points are stored in a separate attribute. This patch doesn't include generic interpolation to evaluated points for Bezier curves. Ref T95942 Differential Revision: https://developer.blender.org/D14284
.. 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.