Fix #35209: cycles generated texture coordinates did not stick to deforming meshes.

5 files changed, 35 insertions, 7 deletions

diff --git a/source/blender/makesrna/intern/rna_internal.h b/source/blender/makesrna/intern/rna_internal.h
index 0a2c876ec50..b78972ea64c 100644
--- a/source/blender/makesrna/intern/rna_internal.h
+++ b/source/blender/makesrna/intern/rna_internal.h
@@ -405,7 +405,7 @@ int rna_parameter_size_alloc(struct PropertyRNA *parm);
 
 struct Mesh *rna_Main_meshes_new_from_object(
         struct Main *bmain, struct ReportList *reports, struct Scene *sce,
-        struct Object *ob, int apply_modifiers, int settings, int calc_tessface);
+        struct Object *ob, int apply_modifiers, int settings, int calc_tessface, int calc_undeformed);
 
 /* XXX, these should not need to be defined here~! */
 struct MTex *rna_mtex_texture_slots_add(struct ID *self, struct bContext *C, struct ReportList *reports);
diff --git a/source/blender/makesrna/intern/rna_main_api.c b/source/blender/makesrna/intern/rna_main_api.c
index 5d554f4393c..1e77a799cd4 100644
--- a/source/blender/makesrna/intern/rna_main_api.c
+++ b/source/blender/makesrna/intern/rna_main_api.c
@@ -276,7 +276,7 @@ static Mesh *rna_Main_meshes_new(Main *bmain, const char *name)
 /* settings: 1 - preview, 2 - render */
 Mesh *rna_Main_meshes_new_from_object(
         Main *bmain, ReportList *reports, Scene *sce,
-        Object *ob, int apply_modifiers, int settings, int calc_tessface)
+        Object *ob, int apply_modifiers, int settings, int calc_tessface, int calc_undeformed)
 {
 	Mesh *tmpmesh;
 	Curve *tmpcu = NULL, *copycu;
@@ -379,6 +379,9 @@ Mesh *rna_Main_meshes_new_from_object(
 				CustomDataMask mask = CD_MASK_MESH; /* this seems more suitable, exporter,
 			                                         * for example, needs CD_MASK_MDEFORMVERT */
 
+				if (calc_undeformed)
+					mask |= CD_MASK_ORCO;
+
 				/* Write the display mesh into the dummy mesh */
 				if (render)
 					dm = mesh_create_derived_render(sce, ob, mask);
@@ -386,7 +389,7 @@ Mesh *rna_Main_meshes_new_from_object(
 					dm = mesh_create_derived_view(sce, ob, mask);
 
 				tmpmesh = BKE_mesh_add(bmain, "Mesh");
-				DM_to_mesh(dm, tmpmesh, ob);
+				DM_to_mesh(dm, tmpmesh, ob, mask);
 				dm->release(dm);
 			}
 
@@ -1172,6 +1175,7 @@ void RNA_def_main_meshes(BlenderRNA *brna, PropertyRNA *cprop)
 	parm = RNA_def_enum(func, "settings", mesh_type_items, 0, "", "Modifier settings to apply");
 	RNA_def_property_flag(parm, PROP_REQUIRED);
 	RNA_def_boolean(func, "calc_tessface", true, "Calculate Tessellation", "Calculate tessellation faces");
+	RNA_def_boolean(func, "calc_undeformed", false, "Calculate Undeformed", "Calculate undeformed vertex coordinates");
 	parm = RNA_def_pointer(func, "mesh", "Mesh", "",
 	                       "Mesh created from object, remove it if it is only used for export");
 	RNA_def_function_return(func, parm);
diff --git a/source/blender/makesrna/intern/rna_mesh.c b/source/blender/makesrna/intern/rna_mesh.c
index ecdd0c949bd..86b2aa4fb2b 100644
--- a/source/blender/makesrna/intern/rna_mesh.c
+++ b/source/blender/makesrna/intern/rna_mesh.c
@@ -591,6 +591,23 @@ static void rna_MeshVertex_groups_begin(CollectionPropertyIterator *iter, Pointe
 		rna_iterator_array_begin(iter, NULL, 0, 0, 0, NULL);
 }
 
+static void rna_MeshVertex_undeformed_co_get(PointerRNA *ptr, float values[3])
+{
+	Mesh *me = rna_mesh(ptr);
+	MVert *mvert = (MVert *)ptr->data;
+	float (*orco)[3] =  CustomData_get_layer(&me->vdata, CD_ORCO);
+
+	if (orco) {
+		/* orco is normalized to 0..1, we do inverse to match mvert->co */
+		float loc[3], size[3];
+
+		BKE_mesh_texspace_get(me->texcomesh ? me->texcomesh : me, loc, NULL, size);
+		madd_v3_v3v3v3(values, loc, orco[(mvert - me->mvert)], size);
+	}
+	else
+		copy_v3_v3(values, mvert->co);
+}
+
 static int rna_CustomDataLayer_active_get(PointerRNA *ptr, CustomData *data, int type, int render)
 {
 	int n = ((CustomDataLayer *)ptr->data) - data->layers;
@@ -1638,6 +1655,12 @@ static void rna_def_mvert(BlenderRNA *brna)
 	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_int_funcs(prop, "rna_MeshVertex_index_get", NULL, NULL);
 	RNA_def_property_ui_text(prop, "Index", "Index number of the vertex");
+
+	prop = RNA_def_property(srna, "undeformed_co", PROP_FLOAT, PROP_TRANSLATION);
+	RNA_def_property_array(prop, 3);
+	RNA_def_property_ui_text(prop, "Undeformed Location", "For meshes with modifiers applied, the coordinate of the vertex with no deforming modifiers applied, as used for generated texture coordinates. ");
+	RNA_def_property_float_funcs(prop, "rna_MeshVertex_undeformed_co_get", NULL, NULL);
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 }
 
 static void rna_def_medge(BlenderRNA *brna)
diff --git a/source/blender/makesrna/intern/rna_object_api.c b/source/blender/makesrna/intern/rna_object_api.c
index 7715dfa64de..a4e532660f1 100644
--- a/source/blender/makesrna/intern/rna_object_api.c
+++ b/source/blender/makesrna/intern/rna_object_api.c
@@ -115,9 +115,9 @@ static void rna_Scene_mat_convert_space(Object *ob, ReportList *reports, bPoseCh
 /* settings: 0 - preview, 1 - render */
 static Mesh *rna_Object_to_mesh(
         Object *ob, ReportList *reports, Scene *sce,
-        int apply_modifiers, int settings, int calc_tessface)
+        int apply_modifiers, int settings, int calc_tessface, int calc_undeformed)
 {
-	return rna_Main_meshes_new_from_object(G.main, reports, sce, ob, apply_modifiers, settings, calc_tessface);
+	return rna_Main_meshes_new_from_object(G.main, reports, sce, ob, apply_modifiers, settings, calc_tessface, calc_undeformed);
 }
 
 /* mostly a copy from convertblender.c */
@@ -456,6 +456,7 @@ void RNA_api_object(StructRNA *srna)
 	parm = RNA_def_enum(func, "settings", mesh_type_items, 0, "", "Modifier settings to apply");
 	RNA_def_property_flag(parm, PROP_REQUIRED);
 	RNA_def_boolean(func, "calc_tessface", true, "Calculate Tessellation", "Calculate tessellation faces");
+	RNA_def_boolean(func, "calc_undeformed", false, "Calculate Undeformed", "Calculate undeformed vertex coordinates");
 	parm = RNA_def_pointer(func, "mesh", "Mesh", "",
 	                       "Mesh created from object, remove it if it is only used for export");
 	RNA_def_function_return(func, parm);
diff --git a/source/blender/makesrna/intern/rna_texture.c b/source/blender/makesrna/intern/rna_texture.c
index d01eab053bd..be6defa11d7 100644
--- a/source/blender/makesrna/intern/rna_texture.c
+++ b/source/blender/makesrna/intern/rna_texture.c
@@ -1625,7 +1625,7 @@ static void rna_def_texture_pointdensity(BlenderRNA *brna)
 		{0, NULL, 0, NULL, NULL}
 	};
 		
-	static EnumPropertyItem vertice_cache_items[] = {
+	static EnumPropertyItem vertex_cache_items[] = {
 		{TEX_PD_OBJECTLOC, "OBJECT_LOCATION", 0, "Object Location", ""},
 		{TEX_PD_OBJECTSPACE, "OBJECT_SPACE", 0, "Object Space", ""},
 		{TEX_PD_WORLDSPACE, "WORLD_SPACE", 0, "Global Space", ""},
@@ -1695,7 +1695,7 @@ static void rna_def_texture_pointdensity(BlenderRNA *brna)
 	
 	prop = RNA_def_property(srna, "vertex_cache_space", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "ob_cache_space");
-	RNA_def_property_enum_items(prop, vertice_cache_items);
+	RNA_def_property_enum_items(prop, vertex_cache_items);
 	RNA_def_property_ui_text(prop, "Vertices Cache", "Coordinate system to cache vertices in");
 	RNA_def_property_update(prop, 0, "rna_Texture_update");