Optimize BKE_mesh_calc_normals(), gives approx 25% speedup.

- no need to allocate polygon normal array.
- no need to use BLI_array_ functions (realloc's).
- reduce some of the looping.

2 files changed, 4 insertions, 4 deletions

diff --git a/source/blender/blenlib/BLI_math_geom.h b/source/blender/blenlib/BLI_math_geom.h
index ad846823669..4ebb1a1a1d9 100644
--- a/source/blender/blenlib/BLI_math_geom.h
+++ b/source/blender/blenlib/BLI_math_geom.h
@@ -237,8 +237,8 @@ void accumulate_vertex_normals(float n1[3], float n2[3], float n3[3],
                                float n4[3], const float f_no[3], const float co1[3], const float co2[3],
                                const float co3[3], const float co4[3]);
 
-void accumulate_vertex_normals_poly(float **vertnos, float polyno[3],
-                                    float **vertcos, float vdiffs[][3], int nverts);
+void accumulate_vertex_normals_poly(float **vertnos, const float polyno[3],
+                                    const float **vertcos, float vdiffs[][3], const int nverts);
 
 /********************************* Tangents **********************************/
 
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c
index c8de9108fc3..5811bb51012 100644
--- a/source/blender/blenlib/intern/math_geom.c
+++ b/source/blender/blenlib/intern/math_geom.c
@@ -3107,8 +3107,8 @@ void accumulate_vertex_normals(float n1[3], float n2[3], float n3[3],
 
 /* Add weighted face normal component into normals of the face vertices.
  * Caller must pass pre-allocated vdiffs of nverts length. */
-void accumulate_vertex_normals_poly(float **vertnos, float polyno[3],
-                                    float **vertcos, float vdiffs[][3], int nverts)
+void accumulate_vertex_normals_poly(float **vertnos, const float polyno[3],
+                                    const float **vertcos, float vdiffs[][3], int nverts)
 {
 	int i;