Curves: Rename "Hair" types, variables, and functions to "Curves"

Based on discussions from T95355 and T94193, the plan is to use
the name "Curves" to describe the data-block container for multiple
curves. Eventually this will replace the existing "Curve" data-block.
However, it will be a while before the curve data-block can be replaced
so in order to distinguish the two curve types in the UI, "Hair Curves"
will be used, but eventually changed back to "Curves".

This patch renames "hair-related" files, functions, types, and variable
names to this convention. A deep rename is preferred to keep code
consistent and to avoid any "hair" terminology from leaking, since the
new data-block is meant for all curve types, not just hair use cases.

The downside of this naming is that the difference between "Curve"
and "Curves" has become important. That was considered during
design discussons and deemed acceptable, especially given the
non-permanent nature of the somewhat common conflict.

Some points of interest:
- All DNA compatibility is lost, just like rBf59767ff9729.
- I renamed `ID_HA` to `ID_CV` so there is no complete mismatch.
- `hair_curves` is used where necessary to distinguish from the
  existing "curves" plural.
- I didn't rename any of the cycles/rendering code function names,
  since that is also used by the old hair particle system.

Differential Revision: https://developer.blender.org/D14007

1 files changed, 5 insertions, 5 deletions

diff --git a/source/blender/draw/intern/draw_cache_impl.h b/source/blender/draw/intern/draw_cache_impl.h
index 6a2f4b91ad1..9c6814d910e 100644
--- a/source/blender/draw/intern/draw_cache_impl.h
+++ b/source/blender/draw/intern/draw_cache_impl.h
@@ -33,7 +33,7 @@ struct ParticleSystem;
 struct TaskGraph;
 
 struct Curve;
-struct Hair;
+struct Curves;
 struct Lattice;
 struct Mesh;
 struct MetaBall;
@@ -73,9 +73,9 @@ void DRW_particle_batch_cache_free(struct ParticleSystem *psys);
 void DRW_gpencil_batch_cache_dirty_tag(struct bGPdata *gpd);
 void DRW_gpencil_batch_cache_free(struct bGPdata *gpd);
 
-void DRW_hair_batch_cache_dirty_tag(struct Hair *hair, int mode);
-void DRW_hair_batch_cache_validate(struct Hair *hair);
-void DRW_hair_batch_cache_free(struct Hair *hair);
+void DRW_curves_batch_cache_dirty_tag(struct Curves *curves, int mode);
+void DRW_curves_batch_cache_validate(struct Curves *curves);
+void DRW_curves_batch_cache_free(struct Curves *curves);
 
 void DRW_pointcloud_batch_cache_dirty_tag(struct PointCloud *pointcloud, int mode);
 void DRW_pointcloud_batch_cache_validate(struct PointCloud *pointcloud);
@@ -188,7 +188,7 @@ struct GPUBatch *DRW_lattice_batch_cache_get_edit_verts(struct Lattice *lt);
 /** \name Hair
  * \{ */
 
-int DRW_hair_material_count_get(struct Hair *hair);
+int DRW_curves_material_count_get(struct Curves *curves);
 
 /** \} */