Curves: Remove redundant custom data pointers

These mutable pointers present problems with ownership in relation to
proper copy-on-write for attributes. The simplest solution is to just
remove them and retrieve the layers from  `CustomData` when they are
needed. This also removes the complexity and redundancy of having to
update the pointers as the curves change. A similar change will apply
to meshes and point clouds.

One downside of this change is that it makes random access with RNA
slower. However, it's simple to just use the RNA attribute API instead,
which is unaffected. In this patch I updated Cycles to do that. With
the future attribute CoW changes, this generic approach makes sense
because Cycles can just request ownership of the existing arrays.

Differential Revision: https://developer.blender.org/D15486

1 files changed, 0 insertions, 2 deletions

diff --git a/source/blender/blenkernel/BKE_curves.hh b/source/blender/blenkernel/BKE_curves.hh
index 25a912b8825..68c90a45031 100644
--- a/source/blender/blenkernel/BKE_curves.hh
+++ b/source/blender/blenkernel/BKE_curves.hh
@@ -385,8 +385,6 @@ class CurvesGeometry : public ::CurvesGeometry {
 
   void calculate_bezier_auto_handles();
 
-  void update_customdata_pointers();
-
   void remove_points(IndexMask points_to_delete);
   void remove_curves(IndexMask curves_to_delete);