Mod_util: Add back vcos parameter to get_texture_coords_mesh().

Now we use vcos when provided, and fall back to mesh vertices' co
otherwise.

Deform modifiers usually do not have up-to-date coordinates in Mesh
itself, only in given vcos array!

3 files changed, 10 insertions, 4 deletions

diff --git a/source/blender/modifiers/intern/MOD_util.c b/source/blender/modifiers/intern/MOD_util.c
index fd3f9e91b9e..195043c8ff8 100644
--- a/source/blender/modifiers/intern/MOD_util.c
+++ b/source/blender/modifiers/intern/MOD_util.c
@@ -72,10 +72,12 @@ void modifier_init_texture(const Scene *scene, Tex *tex)
 }
 
 /* TODO to be renamed to get_texture_coords once we are done with moving modifiers to Mesh. */
+/** \param cos may be NULL, in which case we use directly mesh vertices' coordinates. */
 void get_texture_coords_mesh(
         MappingInfoModifierData *dmd,
         Object *ob,
         Mesh *mesh,
+        float (*cos)[3],
         float (*r_texco)[3])
 {
 	const int numVerts = mesh->totvert;
@@ -135,16 +137,19 @@ void get_texture_coords_mesh(
 	for (i = 0; i < numVerts; ++i, ++mv, ++r_texco) {
 		switch (texmapping) {
 			case MOD_DISP_MAP_LOCAL:
-				copy_v3_v3(*r_texco, mv->co);
+				copy_v3_v3(*r_texco, cos != NULL ? *cos : mv->co);
 				break;
 			case MOD_DISP_MAP_GLOBAL:
-				mul_v3_m4v3(*r_texco, ob->obmat, mv->co);
+				mul_v3_m4v3(*r_texco, ob->obmat, cos != NULL ? *cos : mv->co);
 				break;
 			case MOD_DISP_MAP_OBJECT:
-				mul_v3_m4v3(*r_texco, ob->obmat, mv->co);
+				mul_v3_m4v3(*r_texco, ob->obmat, cos != NULL ? *cos : mv->co);
 				mul_m4_v3(mapob_imat, *r_texco);
 				break;
 		}
+		if (cos != NULL) {
+			cos++;
+		}
 	}
 }
 
diff --git a/source/blender/modifiers/intern/MOD_util.h b/source/blender/modifiers/intern/MOD_util.h
index c3858084354..eba32c3cfde 100644
--- a/source/blender/modifiers/intern/MOD_util.h
+++ b/source/blender/modifiers/intern/MOD_util.h
@@ -48,6 +48,7 @@ void get_texture_coords_mesh(
         struct MappingInfoModifierData *dmd,
         struct Object *ob,
         struct Mesh *mesh,
+        float (*cos)[3],
         float (*r_texco)[3]);
 void modifier_vgroup_cache(struct ModifierData *md, float (*vertexCos)[3]);
 struct DerivedMesh *get_cddm(struct Object *ob, struct BMEditMesh *em, struct DerivedMesh *dm,
diff --git a/source/blender/modifiers/intern/MOD_weightvg_util.c b/source/blender/modifiers/intern/MOD_weightvg_util.c
index bb8ccb8899e..c309bb8dbce 100644
--- a/source/blender/modifiers/intern/MOD_weightvg_util.c
+++ b/source/blender/modifiers/intern/MOD_weightvg_util.c
@@ -145,7 +145,7 @@ void weightvg_do_mask(const int num, const int *indices, float *org_w, const flo
 		t_map.texmapping = tex_mapping;
 
 		tex_co = MEM_calloc_arrayN(numVerts, sizeof(*tex_co), "WeightVG Modifier, TEX mode, tex_co");
-		get_texture_coords_mesh(&t_map, ob, mesh, tex_co);
+		get_texture_coords_mesh(&t_map, ob, mesh, NULL, tex_co);
 
 		modifier_init_texture(scene, texture);