Commit: 7d0fcaa69a64eed8a37598213b120582f12fb437
Author: Bastien Montagne
Date: Thu Feb 28 18:03:48 2019 +0100
Branches: master
https://developer.blender.org/rB7d0fcaa69a64eed8a37598213b120582f12fb437
'Fix' T61942: Triangulate modifier breaks custom normals.
Not a bug, but supporting preservation of custom normals in that
specific modifier makes sense, in game pipeline contexts.
Could also ease work of IO add-ons that want to export
triangulated geometry...
===================================================================
M release/scripts/startup/bl_ui/properties_data_modifier.py
M source/blender/makesdna/DNA_modifier_types.h
M source/blender/makesrna/intern/rna_modifier.c
M source/blender/modifiers/intern/MOD_triangulate.c
===================================================================
diff --git a/release/scripts/startup/bl_ui/properties_data_modifier.py
b/release/scripts/startup/bl_ui/properties_data_modifier.py
index 36deb55978f..d08cb0ac41f 100644
--- a/release/scripts/startup/bl_ui/properties_data_modifier.py
+++ b/release/scripts/startup/bl_ui/properties_data_modifier.py
@@ -1366,6 +1366,7 @@ class DATA_PT_modifiers(ModifierButtonsPanel, Panel):
col = row.column()
col.label(text="Quad Method:")
col.prop(md, "quad_method", text="")
+ col.prop(md, "keep_custom_normals")
col = row.column()
col.label(text="Ngon Method:")
col.prop(md, "ngon_method", text="")
diff --git a/source/blender/makesdna/DNA_modifier_types.h
b/source/blender/makesdna/DNA_modifier_types.h
index 4139b5eb91c..5aec9b95797 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -1552,11 +1552,13 @@ typedef struct TriangulateModifierData {
char _pad[4];
} TriangulateModifierData;
-#ifdef DNA_DEPRECATED
+/* TriangulateModifierData.flag */
enum {
- MOD_TRIANGULATE_BEAUTY = (1 << 0), /* deprecated */
-};
+#ifdef DNA_DEPRECATED
+ MOD_TRIANGULATE_BEAUTY = (1 << 0), /* deprecated */
#endif
+ MOD_TRIANGULATE_KEEP_CUSTOMLOOP_NORMALS = 1 << 1,
+};
/* Triangulate methods - NGons */
enum {
diff --git a/source/blender/makesrna/intern/rna_modifier.c
b/source/blender/makesrna/intern/rna_modifier.c
index ae22fbd5e54..31c78533151 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -4353,6 +4353,13 @@ static void rna_def_modifier_triangulate(BlenderRNA
*brna)
RNA_def_property_enum_items(prop,
rna_enum_modifier_triangulate_ngon_method_items);
RNA_def_property_ui_text(prop, "Polygon Method", "Method for splitting
the polygons into triangles");
RNA_def_property_update(prop, 0, "rna_Modifier_update");
+
+ prop = RNA_def_property(srna, "keep_custom_normals", PROP_BOOLEAN,
PROP_NONE);
+ RNA_def_property_boolean_sdna(prop, NULL, "flag",
MOD_TRIANGULATE_KEEP_CUSTOMLOOP_NORMALS);
+ RNA_def_property_ui_text(prop, "Keep Normals",
+ "Try to preserve custom normals (WARNING:
depending on chosen triangulation method, "
+ "shading may not be fully preserved, 'Fixed'
method usually gives the best result here)");
+ RNA_def_property_update(prop, 0, "rna_Modifier_update");
}
static void rna_def_modifier_meshcache(BlenderRNA *brna)
diff --git a/source/blender/modifiers/intern/MOD_triangulate.c
b/source/blender/modifiers/intern/MOD_triangulate.c
index 2baaff9a676..4f6276492ea 100644
--- a/source/blender/modifiers/intern/MOD_triangulate.c
+++ b/source/blender/modifiers/intern/MOD_triangulate.c
@@ -18,6 +18,8 @@
* \ingroup modifiers
*/
+#include "MEM_guardedalloc.h"
+
#include "BLI_utildefines.h"
#include "DNA_mesh_types.h"
@@ -32,26 +34,68 @@
#include "MOD_modifiertypes.h"
-static Mesh *triangulate_mesh(Mesh *mesh, const int quad_method, const int
ngon_method)
+static Mesh *triangulate_mesh(Mesh *mesh, const int quad_method, const int
ngon_method, const int flag)
{
Mesh *result;
BMesh *bm;
int total_edges, i;
MEdge *me;
+ CustomDataMask cddata_masks = CD_MASK_ORIGINDEX;
+
+ bool keep_clnors = (flag & MOD_TRIANGULATE_KEEP_CUSTOMLOOP_NORMALS) !=
0;
+
+ if (keep_clnors) {
+ BKE_mesh_calc_normals_split(mesh);
+ /* We need that one to 'survive' to/from BMesh conversions. */
+ CustomData_clear_layer_flag(&mesh->ldata, CD_NORMAL,
CD_FLAG_TEMPORARY);
+ cddata_masks |= CD_MASK_NORMAL; /* TODO: once D4421 is in,
only request CD_NORMAL on loop data... */
+ }
bm = BKE_mesh_to_bmesh_ex(
mesh,
&((struct BMeshCreateParams){0}),
&((struct BMeshFromMeshParams){
.calc_face_normal = true,
- .cd_mask_extra = CD_MASK_ORIGINDEX,
+ .cd_mask_extra = cddata_masks,
}));
BM_mesh_triangulate(bm, quad_method, ngon_method, false, NULL, NULL,
NULL);
- result = BKE_mesh_from_bmesh_for_eval_nomain(bm, 0);
+ result = BKE_mesh_from_bmesh_for_eval_nomain(bm, cddata_masks);
BM_mesh_free(bm);
+
+ if (keep_clnors) {
+ bool free_pnors = false;
+ float (*pnors)[3] = CustomData_get_layer(&result->pdata,
CD_NORMAL);
+ if (pnors == NULL) {
+ pnors = MEM_mallocN(sizeof(*pnors) * result->totpoly,
__func__);
+ BKE_mesh_calc_normals_poly(
+ result->mvert, NULL, result->totvert,
+ result->mloop, result->mpoly,
result->totloop, result->totpoly, pnors, false);
+ free_pnors = true;
+ }
+
+ float (*lnors)[3] = CustomData_get_layer(&result->ldata,
CD_NORMAL);
+ short (*clnors)[2] = CustomData_get_layer(&result->ldata,
CD_CUSTOMLOOPNORMAL);
+ if (clnors == NULL) {
+ clnors = CustomData_add_layer(&result->ldata,
CD_CUSTOMLOOPNORMAL, CD_CALLOC, NULL, result->totloop);
+ }
+
+ BKE_mesh_normals_loop_custom_set(
+ result->mvert, result->totvert,
+ result->medge, result->totedge,
+ result->mloop, lnors, result->totloop,
+ result->mpoly, pnors, result->totpoly, clnors);
+
+ /* Do some cleanup, we do not want those temp data to stay
around. */
+ CustomData_set_layer_flag(&mesh->ldata, CD_NORMAL,
CD_FLAG_TEMPORARY);
+ CustomData_set_layer_flag(&result->ldata, CD_NORMAL,
CD_FLAG_TEMPORARY);
+ if (free_pnors) {
+ MEM_freeN(pnors);
+ }
+ }
+
total_edges = result->totedge;
me = result->medge;
@@ -82,7 +126,7 @@ static Mesh *applyModifier(
{
TriangulateModifierData *tmd = (TriangulateModifierData *)md;
Mesh *result;
- if (!(result = triangulate_mesh(mesh, tmd->quad_method,
tmd->ngon_method))) {
+ if (!(result = triangulate_mesh(mesh, tmd->quad_method,
tmd->ngon_method, tmd->flag))) {
return mesh;
}
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