Commit: 487d2cb4f321d9847fb18bd57fbe7ccc3528461f
Author: Bastien Montagne
Date: Wed Aug 12 18:21:41 2015 +0200
Branches: master
https://developer.blender.org/rB487d2cb4f321d9847fb18bd57fbe7ccc3528461f
Displace Modifier: add an option to displace along (averaged) custom normals,
instead of vertex normals.
User suggestion/request from 'boby'.
===================================================================
M source/blender/blenkernel/BKE_mesh.h
M source/blender/blenkernel/intern/mesh_evaluate.c
M source/blender/makesdna/DNA_modifier_types.h
M source/blender/makesrna/intern/rna_modifier.c
M source/blender/modifiers/intern/MOD_displace.c
===================================================================
diff --git a/source/blender/blenkernel/BKE_mesh.h
b/source/blender/blenkernel/BKE_mesh.h
index 1233069..4124198 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -243,6 +243,10 @@ void BKE_mesh_normals_loop_custom_from_vertices_set(
struct MPoly *mpolys, const float (*polynors)[3], const int numPolys,
short (*r_clnors_data)[2]);
+void BKE_mesh_normals_loop_to_vertex(
+ const int numVerts, const struct MLoop *mloops, const int numLoops,
+ const float (*clnors)[3], float (*r_vert_clnors)[3]);
+
void BKE_mesh_calc_poly_normal(
const struct MPoly *mpoly, const struct MLoop *loopstart,
const struct MVert *mvarray, float r_no[3]);
diff --git a/source/blender/blenkernel/intern/mesh_evaluate.c
b/source/blender/blenkernel/intern/mesh_evaluate.c
index 3bc0492..d4787bd 100644
--- a/source/blender/blenkernel/intern/mesh_evaluate.c
+++ b/source/blender/blenkernel/intern/mesh_evaluate.c
@@ -1527,6 +1527,38 @@ void BKE_mesh_normals_loop_custom_from_vertices_set(
mpolys, polynors, numPolys, r_clnors_data,
true);
}
+/**
+ * Computes average per-vertex normals from given custom loop normals.
+ *
+ * @param clnors The computed custom loop normals.
+ * @param r_vert_clnors The (already allocated) array wher to store averaged
per-vertex normals.
+ */
+void BKE_mesh_normals_loop_to_vertex(
+ const int numVerts, const MLoop *mloops, const int numLoops,
+ const float (*clnors)[3], float (*r_vert_clnors)[3])
+{
+ const MLoop *ml;
+ int i;
+
+ int *vert_loops_nbr = MEM_callocN(sizeof(*vert_loops_nbr) *
(size_t)numVerts, __func__);
+
+ copy_vn_fl((float *)r_vert_clnors, 3 * numVerts, 0.0f);
+
+ for (i = 0, ml = mloops; i < numLoops; i++, ml++) {
+ const unsigned int v = ml->v;
+
+ add_v3_v3(r_vert_clnors[v], clnors[i]);
+ vert_loops_nbr[v]++;
+ }
+
+ for (i = 0; i < numVerts; i++) {
+ mul_v3_fl(r_vert_clnors[i], 1.0f / (float)vert_loops_nbr[i]);
+ }
+
+ MEM_freeN(vert_loops_nbr);
+}
+
+
#undef LNOR_SPACE_TRIGO_THRESHOLD
/** \} */
diff --git a/source/blender/makesdna/DNA_modifier_types.h
b/source/blender/makesdna/DNA_modifier_types.h
index 77b9e29..67ec9fe 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -392,6 +392,7 @@ enum {
MOD_DISP_DIR_Z = 2,
MOD_DISP_DIR_NOR = 3,
MOD_DISP_DIR_RGB_XYZ = 4,
+ MOD_DISP_DIR_CLNOR = 5,
};
/* DisplaceModifierData->texmapping */
diff --git a/source/blender/makesrna/intern/rna_modifier.c
b/source/blender/makesrna/intern/rna_modifier.c
index 17b0374..c6f1eca 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -1989,9 +1989,11 @@ static void rna_def_modifier_displace(BlenderRNA *brna)
{MOD_DISP_DIR_Y, "Y", 0, "Y", "Use the texture's intensity
value to displace in the Y direction"},
{MOD_DISP_DIR_Z, "Z", 0, "Z", "Use the texture's intensity
value to displace in the Z direction"},
{MOD_DISP_DIR_NOR, "NORMAL", 0, "Normal",
- "Use the texture's intensity value to
displace in the normal direction"},
+ "Use the texture's intensity value to displace along the
vertex normal"},
+ {MOD_DISP_DIR_CLNOR, "CUSTOM_NORMAL", 0, "Custom Normal",
+ "Use the texture's intensity value to displace along the
(averaged) custom normal (falls back to vertex)"},
{MOD_DISP_DIR_RGB_XYZ, "RGB_TO_XYZ", 0, "RGB to XYZ",
- "Use the texture's RGB values to
displace the mesh in the XYZ direction"},
+ "Use the texture's RGB values to displace the mesh in the XYZ
direction"},
{0, NULL, 0, NULL, NULL}
};
diff --git a/source/blender/modifiers/intern/MOD_displace.c
b/source/blender/modifiers/intern/MOD_displace.c
index 2921472..7523c7c 100644
--- a/source/blender/modifiers/intern/MOD_displace.c
+++ b/source/blender/modifiers/intern/MOD_displace.c
@@ -37,10 +37,11 @@
#include "DNA_object_types.h"
#include "BLI_utildefines.h"
-
+#include "BLI_math.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_library.h"
+#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_texture.h"
#include "BKE_deform.h"
@@ -98,6 +99,10 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob),
ModifierData *md)
/* ask for UV coordinates if we need them */
if (dmd->texmapping == MOD_DISP_MAP_UV) dataMask |= CD_MASK_MTFACE;
+ if (dmd->direction == MOD_DISP_DIR_CLNOR) {
+ dataMask |= CD_MASK_CUSTOMLOOPNORMAL;
+ }
+
return dataMask;
}
@@ -116,7 +121,7 @@ static bool dependsOnTime(ModifierData *md)
static bool dependsOnNormals(ModifierData *md)
{
DisplaceModifierData *dmd = (DisplaceModifierData *)md;
- return (dmd->direction == MOD_DISP_DIR_NOR);
+ return ELEM(dmd->direction, MOD_DISP_DIR_NOR, MOD_DISP_DIR_CLNOR);
}
static void foreachObjectLink(ModifierData *md, Object *ob,
@@ -194,10 +199,12 @@ static void displaceModifier_do(
int i;
MVert *mvert;
MDeformVert *dvert;
+ int direction = dmd->direction;
int defgrp_index;
float (*tex_co)[3];
float weight = 1.0f; /* init value unused but some compilers may
complain */
const float delta_fixed = 1.0f - dmd->midlevel; /* when no texture is
used, we fallback to white */
+ float (*vert_clnors)[3] = NULL;
if (!dmd->texture && dmd->direction == MOD_DISP_DIR_RGB_XYZ) return;
if (dmd->strength == 0.0f) return;
@@ -216,6 +223,25 @@ static void displaceModifier_do(
tex_co = NULL;
}
+ if (direction == MOD_DISP_DIR_CLNOR) {
+ CustomData *ldata = dm->getLoopDataLayout(dm);
+
+ if (CustomData_has_layer(ldata, CD_CUSTOMLOOPNORMAL)) {
+ float (*clnors)[3] = NULL;
+
+ if ((dm->dirty & DM_DIRTY_NORMALS) ||
!CustomData_has_layer(ldata, CD_NORMAL)) {
+ dm->calcLoopNormals(dm, true, (float)M_PI);
+ }
+
+ clnors = CustomData_get_layer(ldata, CD_NORMAL);
+ vert_clnors = MEM_mallocN(sizeof(*vert_clnors) *
(size_t)numVerts, __func__);
+ BKE_mesh_normals_loop_to_vertex(numVerts,
dm->getLoopArray(dm), dm->getNumLoops(dm), clnors, vert_clnors);
+ }
+ else {
+ direction = MOD_DISP_DIR_NOR;
+ }
+ }
+
for (i = 0; i < numVerts; i++) {
TexResult texres;
float strength = dmd->strength;
@@ -240,7 +266,7 @@ static void displaceModifier_do(
delta *= strength;
CLAMP(delta, -10000, 10000);
- switch (dmd->direction) {
+ switch (direction) {
case MOD_DISP_DIR_X:
vertexCos[i][0] += delta;
break;
@@ -260,12 +286,19 @@ static void displaceModifier_do(
vertexCos[i][1] += delta * (mvert[i].no[1] /
32767.0f);
vertexCos[i][2] += delta * (mvert[i].no[2] /
32767.0f);
break;
+ case MOD_DISP_DIR_CLNOR:
+ madd_v3_v3fl(vertexCos[i], vert_clnors[i],
delta);
+ break;
}
}
if (tex_co) {
MEM_freeN(tex_co);
}
+
+ if (vert_clnors) {
+ MEM_freeN(vert_clnors);
+ }
}
static void deformVerts(ModifierData *md, Object *ob,
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