OpenSubdiv: Re-work C-API integration

Main goal is to make API simpler to follow (at least ion terms what
is defined/declared where, as opposite of handful big headers which
includes all the declarations), and also avoid a big set of long and
obscure functions.

Now C-API files are split into smaller ones, following OpenSubdiv
behavior more closely, and also function pointers in structures
used a lot more, which shortens functions names,

UV integration part in GL Mesh is mainly stripped away, it needs
to be done differently. On a related topic, UV coordinates API in
converter needs to be removed as well, we do not need coordinates,
only island connectivity information there.

Additional changes:

- Varying interpolation in evaluator API are temporarily disabled,
  need to extend API somewhere (probably, evaluator's API) to inform
  layout information of vertex data (whether it contains varying
  data, width, stride and such).

- Evaluator now can interpolate face-varying data.
  Only works for adaptive refiner, since some issues in OpenSubdiv
  itself.

Planned changes:

- Remove uv coordinates from TopologyConverter.
- Support evaluation of patches (as opposite to individual coordinates
  as it happens currently).
- Support more flexible layout of varying and face-varying data.
  It is stupid to assume varying is 3 floats and face-varying 2 floats.
- Support of second order derivatives.
- Everything else what i'm missing in this list.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/CCGSubSurf_intern.h b/source/blender/blenkernel/intern/CCGSubSurf_intern.h
index 9df1c9021ef..29e327d8973 100644
--- a/source/blender/blenkernel/intern/CCGSubSurf_intern.h
+++ b/source/blender/blenkernel/intern/CCGSubSurf_intern.h
@@ -236,7 +236,7 @@ struct CCGSubSurf {
 	 * Refiner is created from the modifier stack and used later from the main
 	 * thread to construct GL mesh to avoid threaded access to GL.
 	 */
-	struct OpenSubdiv_TopologyRefinerDescr *osd_topology_refiner;  /* Only used at synchronization stage. */
+	struct OpenSubdiv_TopologyRefiner *osd_topology_refiner;  /* Only used at synchronization stage. */
 	/* Denotes whether osd_mesh is invalid now due to topology changes and needs
 	 * to be reconstructed.
 	 *
@@ -249,7 +249,7 @@ struct CCGSubSurf {
 	/* ** CPU backend. ** */
 
 	/* Limit evaluator, used to evaluate CCG. */
-	struct OpenSubdiv_EvaluatorDescr *osd_evaluator;
+	struct OpenSubdiv_Evaluator *osd_evaluator;
 	/* Next PTex face index, used while CCG synchronization
 	 * to fill in PTex index of CCGFace.
 	 */