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/*
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2011 by Bastien Montagne.
* All rights reserved.
*
* Contributor(s): None yet.
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/*
* XXX I'd like to make modified weights visible in WeightPaint mode,
* but couldn't figure a way to do this…
* Maybe this will need changes in mesh_calc_modifiers (DerivedMesh.c)?
* Or the WeightPaint mode code itself?
*/
#include "BLI_utildefines.h"
#include "BLI_math.h"
#include "BLI_string.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_deform.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_texture.h" /* Texture masking. */
#include "depsgraph_private.h"
#include "MEM_guardedalloc.h"
#include "MOD_util.h"
#include "MOD_weightvg_util.h"
/**
* This mixes the old weight with the new weight factor.
*/
static float mix_weight(float weight, float weight2, char mix_mode)
{
#if 0
/*
* XXX Don't know why, but the switch version takes many CPU time,
* and produces lag in realtime playback…
*/
switch (mix_mode)
{
case MOD_WVG_MIX_ADD:
return (weight + weight2);
case MOD_WVG_MIX_SUB:
return (weight - weight2);
case MOD_WVG_MIX_MUL:
return (weight * weight2);
case MOD_WVG_MIX_DIV:
/* Avoid dividing by zero (or really small values). */
if (0.0 <= weight2 < MOD_WVG_ZEROFLOOR)
weight2 = MOD_WVG_ZEROFLOOR;
else if (-MOD_WVG_ZEROFLOOR < weight2)
weight2 = -MOD_WVG_ZEROFLOOR;
return (weight / weight2);
case MOD_WVG_MIX_DIF:
return (weight < weight2 ? weight2 - weight : weight - weight2);
case MOD_WVG_MIX_AVG:
return (weight + weight2) / 2.0;
case MOD_WVG_MIX_SET:
default:
return weight2;
}
#endif
if (mix_mode == MOD_WVG_MIX_SET)
return weight2;
else if (mix_mode == MOD_WVG_MIX_ADD)
return (weight + weight2);
else if (mix_mode == MOD_WVG_MIX_SUB)
return (weight - weight2);
else if (mix_mode == MOD_WVG_MIX_MUL)
return (weight * weight2);
else if (mix_mode == MOD_WVG_MIX_DIV) {
/* Avoid dividing by zero (or really small values). */
if (weight2 < 0.0f && weight2 > -MOD_WVG_ZEROFLOOR)
weight2 = -MOD_WVG_ZEROFLOOR;
else if (weight2 >= 0.0f && weight2 < MOD_WVG_ZEROFLOOR)
weight2 = MOD_WVG_ZEROFLOOR;
return (weight / weight2);
}
else if (mix_mode == MOD_WVG_MIX_DIF)
return (weight < weight2 ? weight2 - weight : weight - weight2);
else if (mix_mode == MOD_WVG_MIX_AVG)
return (weight + weight2) * 0.5f;
else return weight2;
}
/**************************************
* Modifiers functions. *
**************************************/
static void initData(ModifierData *md)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
wmd->default_weight_a = 0.0f;
wmd->default_weight_b = 0.0f;
wmd->mix_mode = MOD_WVG_MIX_SET;
wmd->mix_set = MOD_WVG_SET_AND;
wmd->mask_constant = 1.0f;
wmd->mask_tex_use_channel = MOD_WVG_MASK_TEX_USE_INT; /* Use intensity by default. */
wmd->mask_tex_mapping = MOD_DISP_MAP_LOCAL;
}
static void copyData(ModifierData *md, ModifierData *target)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
WeightVGMixModifierData *twmd = (WeightVGMixModifierData*) target;
BLI_strncpy(twmd->defgrp_name_a, wmd->defgrp_name_a, sizeof(twmd->defgrp_name_a));
BLI_strncpy(twmd->defgrp_name_b, wmd->defgrp_name_b, sizeof(twmd->defgrp_name_b));
twmd->default_weight_a = wmd->default_weight_a;
twmd->default_weight_b = wmd->default_weight_b;
twmd->mix_mode = wmd->mix_mode;
twmd->mix_set = wmd->mix_set;
twmd->mask_constant = wmd->mask_constant;
BLI_strncpy(twmd->mask_defgrp_name, wmd->mask_defgrp_name, sizeof(twmd->mask_defgrp_name));
twmd->mask_texture = wmd->mask_texture;
twmd->mask_tex_use_channel = wmd->mask_tex_use_channel;
twmd->mask_tex_mapping = wmd->mask_tex_mapping;
twmd->mask_tex_map_obj = wmd->mask_tex_map_obj;
BLI_strncpy(twmd->mask_tex_uvlayer_name, wmd->mask_tex_uvlayer_name, sizeof(twmd->mask_tex_uvlayer_name));
}
static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
CustomDataMask dataMask = 0;
/* We need vertex groups! */
dataMask |= CD_MASK_MDEFORMVERT;
/* Ask for UV coordinates if we need them. */
if(wmd->mask_tex_mapping == MOD_DISP_MAP_UV)
dataMask |= CD_MASK_MTFACE;
return dataMask;
}
static int dependsOnTime(ModifierData *md)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
if(wmd->mask_texture)
return BKE_texture_dependsOnTime(wmd->mask_texture);
return 0;
}
static void foreachObjectLink(ModifierData *md, Object *ob,
void (*walk)(void *userData, Object *ob, Object **obpoin),
void *userData)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
walk(userData, ob, &wmd->mask_tex_map_obj);
}
static void foreachIDLink(ModifierData *md, Object *ob, IDWalkFunc walk, void *userData)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
walk(userData, ob, (ID **)&wmd->mask_texture);
foreachObjectLink(md, ob, (ObjectWalkFunc)walk, userData);
}
static void foreachTexLink(ModifierData *md, Object *ob, TexWalkFunc walk, void *userData)
{
walk(userData, ob, md, "mask_texture");
}
static void updateDepgraph(ModifierData *md, DagForest *forest, struct Scene *UNUSED(scene),
Object *UNUSED(ob), DagNode *obNode)
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
DagNode *curNode;
if(wmd->mask_tex_map_obj && wmd->mask_tex_mapping == MOD_DISP_MAP_OBJECT) {
curNode = dag_get_node(forest, wmd->mask_tex_map_obj);
dag_add_relation(forest, curNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA,
"WeightVGMix Modifier");
}
if(wmd->mask_tex_mapping == MOD_DISP_MAP_GLOBAL)
dag_add_relation(forest, obNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA,
"WeightVGMix Modifier");
}
static int isDisabled(ModifierData *md, int UNUSED(useRenderParams))
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
/* If no vertex group, bypass. */
return (wmd->defgrp_name_a[0] == '\0');
}
static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *derivedData,
int UNUSED(useRenderParams), int UNUSED(isFinalCalc))
{
WeightVGMixModifierData *wmd = (WeightVGMixModifierData*) md;
DerivedMesh *dm = derivedData, *ret = NULL;
#if 0
Mesh *ob_m = NULL;
#endif
MDeformVert *dvert = NULL;
int numVerts;
int defgrp_idx, defgrp_idx2 = -1;
float *org_w;
float *new_w;
int *tidx, *indices = NULL;
int numIdx = 0;
int i, j;
char rel_ret = 0; /* Boolean, whether we have to release ret dm or not, when not using it! */
/* Get number of verts. */
numVerts = dm->getNumVerts(dm);
/* Check if we can just return the original mesh.
* Must have verts and therefore verts assigned to vgroups to do anything useful!
*/
if ((numVerts == 0) || (ob->defbase.first == NULL))
return dm;
/* Get vgroup idx from its name. */
defgrp_idx = defgroup_name_index(ob, wmd->defgrp_name_a);
if (defgrp_idx < 0)
return dm;
/* Get seconf vgroup idx from its name, if given. */
if (wmd->defgrp_name_b[0] != (char)0) {
defgrp_idx2 = defgroup_name_index(ob, wmd->defgrp_name_b);
if (defgrp_idx2 < 0)
return dm;
}
/* XXX All this to avoid copying dm when not needed… However, it nearly doubles compute
* time! See scene 5 of the WeighVG test file…
*/
#if 0
/* Get actual dverts (ie vertex group data). */
dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);
/* If no dverts, return unmodified data… */
if (dvert == NULL)
return dm;
/* Get org mesh, only to test whether affected cdata layer has already been copied
* somewhere up in the modifiers stack.
*/
ob_m = get_mesh(ob);
if (ob_m == NULL)
return dm;
/* Create a copy of our dmesh, only if our affected cdata layer is the same as org mesh. */
if (dvert == CustomData_get_layer(&ob_m->vdata, CD_MDEFORMVERT)) {
/* XXX Seems to create problems with weightpaint mode???
* I'm missing something here, I guess…
*/
// DM_set_only_copy(dm, CD_MASK_MDEFORMVERT); /* Only copy defgroup layer. */
ret = CDDM_copy(dm);
dvert = ret->getVertDataArray(ret, CD_MDEFORMVERT);
if (dvert == NULL) {
ret->release(ret);
return dm;
}
rel_ret = 1;
}
else
ret = dm;
#else
ret = CDDM_copy(dm, 0);
rel_ret = 1;
dvert = ret->getVertDataArray(ret, CD_MDEFORMVERT);
if (dvert == NULL) {
if (rel_ret)
ret->release(ret);
return dm;
}
#endif
/* Find out which vertices to work on. */
tidx = MEM_mallocN(sizeof(int) * numVerts, "WeightVGMix Modifier, tidx");
switch (wmd->mix_set) {
case MOD_WVG_SET_A:
/* All vertices in first vgroup. */
for (i = 0; i < numVerts; i++) {
for (j = 0; j < dvert[i].totweight; j++) {
if(dvert[i].dw[j].def_nr == defgrp_idx) {
tidx[numIdx++] = i;
break;
}
}
}
break;
case MOD_WVG_SET_B:
/* All vertices in second vgroup. */
for (i = 0; i < numVerts; i++) {
for (j = 0; j < dvert[i].totweight; j++) {
if(dvert[i].dw[j].def_nr == defgrp_idx2) {
tidx[numIdx++] = i;
break;
}
}
}
break;
case MOD_WVG_SET_OR:
/* All vertices in one vgroup or the other. */
for (i = 0; i < numVerts; i++) {
for (j = 0; j < dvert[i].totweight; j++) {
if(dvert[i].dw[j].def_nr == defgrp_idx || dvert[i].dw[j].def_nr == defgrp_idx2) {
tidx[numIdx++] = i;
break;
}
}
}
break;
case MOD_WVG_SET_AND:
/* All vertices in both vgroups. */
for (i = 0; i < numVerts; i++) {
int idx1 = FALSE;
int idx2 = FALSE;
for (j = 0; j < dvert[i].totweight; j++) {
if(dvert[i].dw[j].def_nr == defgrp_idx) {
if (idx2 == TRUE) {
tidx[numIdx++] = i;
break;
}
else {
idx1 = TRUE;
}
}
else if(dvert[i].dw[j].def_nr == defgrp_idx2) {
if (idx1 == TRUE) {
tidx[numIdx++] = i;
break;
}
else {
idx2 = TRUE;
}
}
}
}
break;
case MOD_WVG_SET_ALL:
default:
/* Use all vertices, no need to do anything here. */
break;
}
if (numIdx) {
indices = MEM_mallocN(sizeof(int) * numIdx, "WeightVGMix Modifier, indices");
memcpy(indices, tidx, sizeof(int) * numIdx);
}
else
numIdx = numVerts;
MEM_freeN(tidx);
org_w = MEM_mallocN(sizeof(float) * numIdx, "WeightVGMix Modifier, org_w");
new_w = MEM_mallocN(sizeof(float) * numIdx, "WeightVGMix Modifier, new_w");
/* Mix weights. */
for (i = 0; i < numIdx; i++) {
float weight2 = 0.0;
int w1 = FALSE;
int w2 = FALSE;
int idx = indices ? indices[i] : i;
for (j = 0; j < dvert[idx].totweight; j++) {
if(dvert[idx].dw[j].def_nr == defgrp_idx) {
org_w[i] = dvert[idx].dw[j].weight;
w1 = TRUE;
if (w2 == TRUE)
break;
}
else if(dvert[idx].dw[j].def_nr == defgrp_idx2) {
weight2 = dvert[idx].dw[j].weight;
w2 = TRUE;
if (w1 == TRUE)
break;
}
}
if (w1 == FALSE)
org_w[i] = wmd->default_weight_a;
if (w2 == FALSE)
weight2 = wmd->default_weight_b;
new_w[i] = mix_weight(org_w[i], weight2, wmd->mix_mode);
}
/* Do masking. */
weightvg_do_mask(numIdx, indices, org_w, new_w, ob, ret, wmd->mask_constant,
wmd->mask_defgrp_name, wmd->mask_texture, wmd->mask_tex_use_channel,
wmd->mask_tex_mapping, wmd->mask_tex_map_obj, wmd->mask_tex_uvlayer_name);
/* Update (add to) vgroup.
* XXX Depending on the MOD_WVG_SET_xxx option chosen, we might have to add vertices to vgroup.
*/
weightvg_update_vg(dvert, defgrp_idx, numIdx, indices, org_w, TRUE, -FLT_MAX, 0, 0.0f);
/* Freeing stuff. */
MEM_freeN(org_w);
MEM_freeN(new_w);
if (indices)
MEM_freeN(indices);
/* Return the vgroup-modified mesh. */
return ret;
}
static DerivedMesh *applyModifierEM(ModifierData *md, Object *ob,
struct BMEditMesh *UNUSED(editData),
DerivedMesh *derivedData)
{
return applyModifier(md, ob, derivedData, 0, 1);
}
ModifierTypeInfo modifierType_WeightVGMix = {
/* name */ "VertexWeightMix",
/* structName */ "WeightVGMixModifierData",
/* structSize */ sizeof(WeightVGMixModifierData),
/* type */ eModifierTypeType_Nonconstructive,
/* flags */ eModifierTypeFlag_AcceptsMesh
/* |eModifierTypeFlag_SupportsMapping*/
|eModifierTypeFlag_SupportsEditmode,
/* copyData */ copyData,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* applyModifierEM */ applyModifierEM,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ NULL,
/* isDisabled */ isDisabled,
/* updateDepgraph */ updateDepgraph,
/* dependsOnTime */ dependsOnTime,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ foreachObjectLink,
/* foreachIDLink */ foreachIDLink,
/* foreachTexLink */ foreachTexLink,
};
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