Subdiv: Extend some comments

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_subdiv_eval.h b/source/blender/blenkernel/BKE_subdiv_eval.h
index 095d3c17d63..3f682716928 100644
--- a/source/blender/blenkernel/BKE_subdiv_eval.h
+++ b/source/blender/blenkernel/BKE_subdiv_eval.h
@@ -50,6 +50,8 @@ void BKE_subdiv_eval_init_displacement(struct Subdiv *subdiv);
 
 /* Single point queries. */
 
+/* Evaluate point at a limit surface, with optional derivatives and normal. */
+
 void BKE_subdiv_eval_limit_point(
     struct Subdiv *subdiv, const int ptex_face_index, const float u, const float v, float r_P[3]);
 void BKE_subdiv_eval_limit_point_and_derivatives(struct Subdiv *subdiv,
@@ -72,6 +74,7 @@ void BKE_subdiv_eval_limit_point_and_short_normal(struct Subdiv *subdiv,
                                                   float r_P[3],
                                                   short r_N[3]);
 
+/* Evaluate face-varying layer (such as UV). */
 void BKE_subdiv_eval_face_varying(struct Subdiv *subdiv,
                                   const int face_varying_channel,
                                   const int ptex_face_index,
@@ -93,6 +96,7 @@ void BKE_subdiv_eval_displacement(struct Subdiv *subdiv,
                                   const float dPdv[3],
                                   float r_D[3]);
 
+/* Evaluate point on a limit surface with displacement applied to it. */
 void BKE_subdiv_eval_final_point(
     struct Subdiv *subdiv, const int ptex_face_index, const float u, const float v, float r_P[3]);