Hair Info Length Attribute

Goal is to add the length attribute to the Hair Info node, for better control over color gradients or similar along the hair.

Reviewed By: #eevee_viewport, brecht

Differential Revision: https://developer.blender.org/D10481

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/draw/intern/draw_hair_private.h b/source/blender/draw/intern/draw_hair_private.h
index 1f58d8d0ead..289a1690fc6 100644
--- a/source/blender/draw/intern/draw_hair_private.h
+++ b/source/blender/draw/intern/draw_hair_private.h
@@ -66,6 +66,10 @@ typedef struct ParticleHairCache {
   GPUVertBuf *proc_strand_buf;
   GPUTexture *strand_tex;
 
+  /* Hair Length */
+  GPUVertBuf *proc_length_buf;
+  GPUTexture *length_tex;
+
   GPUVertBuf *proc_strand_seg_buf;
   GPUTexture *strand_seg_tex;
 
@@ -93,11 +97,13 @@ bool particles_ensure_procedural_data(struct Object *object,
                                       struct ParticleSystem *psys,
                                       struct ModifierData *md,
                                       struct ParticleHairCache **r_hair_cache,
+                                      struct GPUMaterial *gpu_material,
                                       int subdiv,
                                       int thickness_res);
 
 bool hair_ensure_procedural_data(struct Object *object,
                                  struct ParticleHairCache **r_hair_cache,
+                                 struct GPUMaterial *gpu_material,
                                  int subdiv,
                                  int thickness_res);