Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/documentation/glevallimit.rst

@@ -0,0 +1,66 @@
+..
+     Copyright 2013 Pixar
+
+     Licensed under the terms set forth in the LICENSE.txt file available at
+     https://opensubdiv.org/license.
+
+
+glEvalLimit
+-----------
+
+.. contents::
+   :local:
+   :backlinks: none
+
+SYNOPSIS
+========
+
+.. parsed-literal::
+   :class: codefhead
+
+   **glEvalLimit** [**-f**] [**-yup**] [**-u**] [**-a**] [**-l** *refinement level*]
+       *objfile(s)* [**-catmark**] [**-loop**] [**-bilinear**]
+
+DESCRIPTION
+===========
+
+``glEvalLimit`` is a stand-alone application that showcases the limit surface
+Eval module. On the given shape, random samples are generated in local s,t space.
+Vertex, varying and face-varying data is then computed on the surface limit and
+displayed as colors.
+
+In order to emphasize the dynamic nature of the EvalLimit API, where the
+locations can be arbitrarily updated before each evaluation, the glEvalLimit
+example treats each sample as a 'ST particle'.
+
+ST Particles are a simplified parametric-space particle dynamics simulation: each
+particle is assigned a location on the subdivision surface limit that is
+composed of a unique ptex face index, with a local (s,t) parametric pair.
+
+The system also generates an array of parametric velocities (ds, dt) for each
+particle. An Update() function then applies the velocities to the locations and
+moves the points along the parametric space.
+
+Face boundaries are managed using a ptex adjacency table obtained from the
+Far::TopologyRefiner. Every time a particle moves outside of the [0.0f, 1.0f]
+parametric range, a 'warp' function moves it to the neighboring face, or
+bounces it, if the edge happens to be a boundary.
+
+Note: currently the adjacency code does not handle 'diagonal' crossings, nor
+crossings between quad and non-quad faces.
+
+Multiple controls are available to experiment with the algorithms.
+
+.. image:: images/glevallimit.jpg
+   :width: 400px
+   :align: center
+   :target: images/glevallimit.jpg
+
+OPTIONS
+=======
+
+See the description of the
+`common comand line options <code_examples.html#common-command-line-options>`__
+for the subset of common options supported here.
+
+.. include:: examples_see_also.rst