Modify CCGSubsurf to subdivide an arbitrary number of (float) layers.

The layout of vert data in CCGSubSurf is almost the same; previously
it was three floats (for xyz coordinate) optionally followed by three
floats for the normal. The only change is that the first three floats
can now be any number of floats.

* _getSubSurf takes a numLayers parameter to set the number of layers,
  stored in CCGMeshIFC.numLayers.

* All calls to _getSubSurf currently have numLayers set to 3, except
  for UV subsurf, where it is reduced to 2 (with a corresponding
  change when reading the results out to use float (*)[2] rather than
  float (*)[3].)

* The various VertData* macros in CCGSubSurf.c are now functions that
  take a CCGSubSurf pointer, which provides access to CCGMeshIFC,
  which has numLayers.

* Add ccgSubSurf_setNumLayers() to the API. Only changes the number of
  layers that get subdivided, doesn't change the amount of memory
  allocated. So if space for N layers is allocated, it's safe to set
  the number of layers to less than N, but not more.

* The rest of the changes are just adding the 'ss' parameter.

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/CCGSubSurf.h b/source/blender/blenkernel/intern/CCGSubSurf.h
index e73ef6b543e..76e1911b0a5 100644
--- a/source/blender/blenkernel/intern/CCGSubSurf.h
+++ b/source/blender/blenkernel/intern/CCGSubSurf.h
@@ -15,7 +15,7 @@ typedef struct CCGFace CCGFace;
 
 typedef struct CCGMeshIFC {
 	int			vertUserSize, edgeUserSize, faceUserSize;
-
+	int			numLayers;
 	int			vertDataSize;
 } CCGMeshIFC;
 
@@ -77,6 +77,8 @@ CCGError	ccgSubSurf_setUseAgeCounts			(CCGSubSurf *ss, int useAgeCounts, int ver
 
 CCGError	ccgSubSurf_setCalcVertexNormals		(CCGSubSurf *ss, int useVertNormals, int normalDataOffset);
 
+void		ccgSubSurf_setNumLayers				(CCGSubSurf *ss, int numLayers);
+
 /***/
 
 int			ccgSubSurf_getNumVerts				(const CCGSubSurf *ss);