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/*
* ***** 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) 2005 by the Blender Foundation.
* All rights reserved.
*
* Contributor(s): Daniel Dunbar
* Ton Roosendaal,
* Ben Batt,
* Brecht Van Lommel,
* Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/modifiers/intern/MOD_decimate.c
* \ingroup modifiers
*/
#include "DNA_object_types.h"
#include "BLI_math.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "BLF_translation.h"
#include "MEM_guardedalloc.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_deform.h"
#include "BKE_particle.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_tessmesh.h"
#include "bmesh.h"
// #define USE_TIMEIT
#ifdef USE_TIMEIT
# include "PIL_time.h"
#endif
#include "MOD_util.h"
static void initData(ModifierData *md)
{
DecimateModifierData *dmd = (DecimateModifierData *) md;
dmd->percent = 1.0;
dmd->angle = DEG2RADF(15.0f);
}
static void copyData(ModifierData *md, ModifierData *target)
{
DecimateModifierData *dmd = (DecimateModifierData *) md;
DecimateModifierData *tdmd = (DecimateModifierData *) target;
tdmd->percent = dmd->percent;
tdmd->iter = dmd->iter;
tdmd->angle = dmd->angle;
BLI_strncpy(tdmd->defgrp_name, dmd->defgrp_name, sizeof(tdmd->defgrp_name));
tdmd->flag = dmd->flag;
tdmd->mode = dmd->mode;
}
static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
DecimateModifierData *dmd = (DecimateModifierData *) md;
CustomDataMask dataMask = 0;
/* ask for vertexgroups if we need them */
if (dmd->defgrp_name[0]) dataMask |= CD_MASK_MDEFORMVERT;
return dataMask;
}
static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
DerivedMesh *derivedData,
ModifierApplyFlag UNUSED(flag))
{
DecimateModifierData *dmd = (DecimateModifierData *) md;
DerivedMesh *dm = derivedData, *result = NULL;
BMEditMesh *em;
BMesh *bm;
const int do_triangulate = (dmd->flag & MOD_DECIM_FLAG_TRIANGULATE) != 0;
float *vweights = NULL;
#ifdef USE_TIMEIT
TIMEIT_START(decim);
#endif
if (dmd->percent == 1.0f) {
return dm;
}
else if (dm->getNumPolys(dm) <= 3) {
modifier_setError(md, "%s", TIP_("Modifier requires more than 3 input faces"));
return dm;
}
if (dmd->mode == MOD_DECIM_MODE_COLLAPSE) {
if (dmd->defgrp_name[0]) {
MDeformVert *dvert;
int defgrp_index;
modifier_get_vgroup(ob, dm, dmd->defgrp_name, &dvert, &defgrp_index);
if (dvert) {
const unsigned int vert_tot = dm->getNumVerts(dm);
unsigned int i;
vweights = MEM_mallocN(vert_tot * sizeof(float), __func__);
if (dmd->flag & MOD_DECIM_FLAG_INVERT_VGROUP) {
for (i = 0; i < vert_tot; i++) {
vweights[i] = 1.0f - defvert_find_weight(&dvert[i], defgrp_index);
}
}
else {
for (i = 0; i < vert_tot; i++) {
vweights[i] = defvert_find_weight(&dvert[i], defgrp_index);
}
}
}
}
}
em = DM_to_editbmesh(dm, NULL, FALSE);
bm = em->bm;
switch (dmd->mode) {
case MOD_DECIM_MODE_COLLAPSE:
BM_mesh_decimate_collapse(bm, dmd->percent, vweights, do_triangulate);
break;
case MOD_DECIM_MODE_UNSUBDIV:
BM_mesh_decimate_unsubdivide(bm, dmd->iter);
break;
case MOD_DECIM_MODE_DISSOLVE:
BM_mesh_decimate_dissolve(bm, dmd->angle);
break;
}
if (vweights) {
MEM_freeN(vweights);
}
/* update for display only */
dmd->face_count = bm->totface;
BLI_assert(em->looptris == NULL);
result = CDDM_from_BMEditMesh(em, NULL, TRUE, FALSE);
BMEdit_Free(em);
MEM_freeN(em);
#ifdef USE_TIMEIT
TIMEIT_END(decim);
#endif
return result;
}
ModifierTypeInfo modifierType_Decimate = {
/* name */ "Decimate",
/* structName */ "DecimateModifierData",
/* structSize */ sizeof(DecimateModifierData),
/* type */ eModifierTypeType_Nonconstructive,
/* flags */ eModifierTypeFlag_AcceptsMesh,
/* copyData */ copyData,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* applyModifierEM */ NULL,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ NULL,
/* isDisabled */ NULL,
/* updateDepgraph */ NULL,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ NULL,
/* foreachIDLink */ NULL,
/* foreachTexLink */ NULL,
};
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