246 lines
6.4 KiB
C
246 lines
6.4 KiB
C
/*
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* $Id$
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2005 by the Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Daniel Dunbar
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* Ton Roosendaal,
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* Ben Batt,
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* Brecht Van Lommel,
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* Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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/** \file blender/modifiers/intern/MOD_particlesystem.c
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* \ingroup modifiers
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*/
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#include "stddef.h"
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#include "DNA_material_types.h"
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#include "BLI_utildefines.h"
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#include "BKE_cdderivedmesh.h"
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#include "BKE_material.h"
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#include "BKE_modifier.h"
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#include "BKE_particle.h"
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#include "MOD_util.h"
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static void initData(ModifierData *md)
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{
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ParticleSystemModifierData *psmd= (ParticleSystemModifierData*) md;
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psmd->psys= 0;
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psmd->dm=0;
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psmd->totdmvert= psmd->totdmedge= psmd->totdmface= 0;
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}
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static void freeData(ModifierData *md)
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{
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ParticleSystemModifierData *psmd= (ParticleSystemModifierData*) md;
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if(psmd->dm){
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psmd->dm->needsFree = 1;
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psmd->dm->release(psmd->dm);
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psmd->dm=0;
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}
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/* ED_object_modifier_remove may have freed this first before calling
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* modifier_free (which calls this function) */
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if(psmd->psys)
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psmd->psys->flag |= PSYS_DELETE;
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}
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static void copyData(ModifierData *md, ModifierData *target)
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{
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ParticleSystemModifierData *psmd= (ParticleSystemModifierData*) md;
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ParticleSystemModifierData *tpsmd= (ParticleSystemModifierData*) target;
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tpsmd->dm = 0;
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tpsmd->totdmvert = tpsmd->totdmedge = tpsmd->totdmface = 0;
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//tpsmd->facepa = 0;
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tpsmd->flag = psmd->flag;
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/* need to keep this to recognise a bit later in copy_object */
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tpsmd->psys = psmd->psys;
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}
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static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
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{
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ParticleSystemModifierData *psmd= (ParticleSystemModifierData*) md;
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CustomDataMask dataMask = 0;
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MTex *mtex;
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int i;
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if(!psmd->psys->part)
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return 0;
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for(i=0; i<MAX_MTEX; i++) {
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mtex = psmd->psys->part->mtex[i];
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if(mtex && mtex->mapto && (mtex->texco & TEXCO_UV))
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dataMask |= CD_MASK_MTFACE;
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}
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if(psmd->psys->part->tanfac!=0.0)
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dataMask |= CD_MASK_MTFACE;
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/* ask for vertexgroups if we need them */
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for(i=0; i<PSYS_TOT_VG; i++){
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if(psmd->psys->vgroup[i]){
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dataMask |= CD_MASK_MDEFORMVERT;
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break;
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}
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}
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/* particles only need this if they are after a non deform modifier, and
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* the modifier stack will only create them in that case. */
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dataMask |= CD_MASK_ORIGSPACE|CD_MASK_ORIGINDEX;
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dataMask |= CD_MASK_ORCO;
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return dataMask;
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}
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/* saves the current emitter state for a particle system and calculates particles */
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static void deformVerts(ModifierData *md, Object *ob,
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DerivedMesh *derivedData,
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float (*vertexCos)[3],
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int UNUSED(numVerts),
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int UNUSED(useRenderParams),
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int UNUSED(isFinalCalc))
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{
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DerivedMesh *dm = derivedData;
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ParticleSystemModifierData *psmd= (ParticleSystemModifierData*) md;
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ParticleSystem * psys=0;
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int needsFree=0;
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if(ob->particlesystem.first)
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psys=psmd->psys;
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else
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return;
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if(!psys_check_enabled(ob, psys))
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return;
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if(dm==0) {
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dm= get_dm(ob, NULL, NULL, vertexCos, 1);
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if(!dm)
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return;
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needsFree= 1;
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}
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/* clear old dm */
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if(psmd->dm){
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psmd->dm->needsFree = 1;
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psmd->dm->release(psmd->dm);
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}
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else if(psmd->flag & eParticleSystemFlag_file_loaded) {
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/* in file read dm just wasn't saved in file so no need to reset everything */
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psmd->flag &= ~eParticleSystemFlag_file_loaded;
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}
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else {
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/* no dm before, so recalc particles fully */
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psys->recalc |= PSYS_RECALC_RESET;
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}
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/* make new dm */
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psmd->dm=CDDM_copy(dm);
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CDDM_apply_vert_coords(psmd->dm, vertexCos);
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CDDM_calc_normals(psmd->dm);
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if(needsFree){
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dm->needsFree = 1;
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dm->release(dm);
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}
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/* protect dm */
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psmd->dm->needsFree = 0;
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/* report change in mesh structure */
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if(psmd->dm->getNumVerts(psmd->dm)!=psmd->totdmvert ||
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psmd->dm->getNumEdges(psmd->dm)!=psmd->totdmedge ||
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psmd->dm->getNumFaces(psmd->dm)!=psmd->totdmface){
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psys->recalc |= PSYS_RECALC_RESET;
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psmd->totdmvert= psmd->dm->getNumVerts(psmd->dm);
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psmd->totdmedge= psmd->dm->getNumEdges(psmd->dm);
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psmd->totdmface= psmd->dm->getNumFaces(psmd->dm);
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}
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if(psys) {
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psmd->flag &= ~eParticleSystemFlag_psys_updated;
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particle_system_update(md->scene, ob, psys);
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psmd->flag |= eParticleSystemFlag_psys_updated;
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}
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}
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/* disabled particles in editmode for now, until support for proper derivedmesh
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* updates is coded */
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#if 0
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static void deformVertsEM(
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ModifierData *md, Object *ob, EditMesh *editData,
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DerivedMesh *derivedData, float (*vertexCos)[3], int numVerts)
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{
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DerivedMesh *dm = derivedData;
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if(!derivedData) dm = CDDM_from_editmesh(editData, ob->data);
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deformVerts(md, ob, dm, vertexCos, numVerts);
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if(!derivedData) dm->release(dm);
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}
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#endif
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ModifierTypeInfo modifierType_ParticleSystem = {
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/* name */ "ParticleSystem",
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/* structName */ "ParticleSystemModifierData",
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/* structSize */ sizeof(ParticleSystemModifierData),
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/* type */ eModifierTypeType_OnlyDeform,
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/* flags */ eModifierTypeFlag_AcceptsMesh
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| eModifierTypeFlag_SupportsMapping
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| eModifierTypeFlag_UsesPointCache /*
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| eModifierTypeFlag_SupportsEditmode
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| eModifierTypeFlag_EnableInEditmode */,
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/* copyData */ copyData,
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/* deformVerts */ deformVerts,
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/* deformVertsEM */ 0 /* deformVertsEM */ ,
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/* deformMatrices */ 0,
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/* deformMatricesEM */ 0,
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/* applyModifier */ 0,
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/* applyModifierEM */ 0,
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/* initData */ initData,
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/* requiredDataMask */ requiredDataMask,
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/* freeData */ freeData,
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/* isDisabled */ 0,
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/* updateDepgraph */ 0,
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/* dependsOnTime */ 0,
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/* dependsOnNormals */ 0,
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/* foreachObjectLink */ 0,
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/* foreachIDLink */ 0,
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};
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