4561 lines
122 KiB
C
4561 lines
122 KiB
C
/* particle.c
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*
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*
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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) 2007 by Janne Karhu.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/particle.c
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* \ingroup bke
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*/
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#include <stdlib.h>
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#include <math.h>
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#include <string.h>
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#include "MEM_guardedalloc.h"
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#include "DNA_curve_types.h"
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#include "DNA_group_types.h"
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#include "DNA_key_types.h"
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#include "DNA_material_types.h"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_particle_types.h"
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#include "DNA_smoke_types.h"
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#include "DNA_scene_types.h"
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#include "DNA_dynamicpaint_types.h"
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#include "BLI_blenlib.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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#include "BLI_kdtree.h"
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#include "BLI_rand.h"
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#include "BLI_threads.h"
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#include "BKE_anim.h"
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#include "BKE_animsys.h"
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#include "BKE_boids.h"
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#include "BKE_cloth.h"
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#include "BKE_effect.h"
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#include "BKE_global.h"
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#include "BKE_group.h"
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#include "BKE_main.h"
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#include "BKE_lattice.h"
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#include "BKE_displist.h"
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#include "BKE_particle.h"
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#include "BKE_object.h"
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#include "BKE_material.h"
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#include "BKE_key.h"
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#include "BKE_library.h"
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#include "BKE_depsgraph.h"
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#include "BKE_modifier.h"
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#include "BKE_mesh.h"
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#include "BKE_cdderivedmesh.h"
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#include "BKE_pointcache.h"
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#include "RE_render_ext.h"
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static void get_child_modifier_parameters(ParticleSettings *part, ParticleThreadContext *ctx,
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ChildParticle *cpa, short cpa_from, int cpa_num, float *cpa_fuv, float *orco, ParticleTexture *ptex);
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static void do_child_modifiers(ParticleSimulationData *sim,
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ParticleTexture *ptex, ParticleKey *par, float *par_rot, ChildParticle *cpa,
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float *orco, float mat[4][4], ParticleKey *state, float t);
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/* few helpers for countall etc. */
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int count_particles(ParticleSystem *psys){
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ParticleSettings *part=psys->part;
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PARTICLE_P;
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int tot=0;
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LOOP_SHOWN_PARTICLES {
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if(pa->alive == PARS_UNBORN && (part->flag & PART_UNBORN)==0);
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else if(pa->alive == PARS_DEAD && (part->flag & PART_DIED)==0);
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else tot++;
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}
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return tot;
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}
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int count_particles_mod(ParticleSystem *psys, int totgr, int cur){
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ParticleSettings *part=psys->part;
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PARTICLE_P;
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int tot=0;
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LOOP_SHOWN_PARTICLES {
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if(pa->alive == PARS_UNBORN && (part->flag & PART_UNBORN)==0);
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else if(pa->alive == PARS_DEAD && (part->flag & PART_DIED)==0);
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else if(p%totgr==cur) tot++;
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}
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return tot;
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}
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/* we allocate path cache memory in chunks instead of a big continguous
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* chunk, windows' memory allocater fails to find big blocks of memory often */
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#define PATH_CACHE_BUF_SIZE 1024
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static ParticleCacheKey **psys_alloc_path_cache_buffers(ListBase *bufs, int tot, int steps)
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{
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LinkData *buf;
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ParticleCacheKey **cache;
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int i, totkey, totbufkey;
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tot= MAX2(tot, 1);
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totkey = 0;
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cache = MEM_callocN(tot*sizeof(void*), "PathCacheArray");
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while(totkey < tot) {
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totbufkey= MIN2(tot-totkey, PATH_CACHE_BUF_SIZE);
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buf= MEM_callocN(sizeof(LinkData), "PathCacheLinkData");
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buf->data= MEM_callocN(sizeof(ParticleCacheKey)*totbufkey*steps, "ParticleCacheKey");
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for(i=0; i<totbufkey; i++)
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cache[totkey+i] = ((ParticleCacheKey*)buf->data) + i*steps;
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totkey += totbufkey;
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BLI_addtail(bufs, buf);
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}
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return cache;
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}
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static void psys_free_path_cache_buffers(ParticleCacheKey **cache, ListBase *bufs)
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{
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LinkData *buf;
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if(cache)
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MEM_freeN(cache);
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for(buf= bufs->first; buf; buf=buf->next)
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MEM_freeN(buf->data);
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BLI_freelistN(bufs);
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}
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/************************************************/
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/* Getting stuff */
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/************************************************/
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/* get object's active particle system safely */
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ParticleSystem *psys_get_current(Object *ob)
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{
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ParticleSystem *psys;
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if(ob==NULL) return NULL;
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for(psys=ob->particlesystem.first; psys; psys=psys->next){
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if(psys->flag & PSYS_CURRENT)
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return psys;
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}
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return NULL;
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}
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short psys_get_current_num(Object *ob)
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{
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ParticleSystem *psys;
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short i;
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if(ob==NULL) return 0;
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for(psys=ob->particlesystem.first, i=0; psys; psys=psys->next, i++)
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if(psys->flag & PSYS_CURRENT)
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return i;
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return i;
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}
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void psys_set_current_num(Object *ob, int index)
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{
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ParticleSystem *psys;
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short i;
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if(ob==NULL) return;
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for(psys=ob->particlesystem.first, i=0; psys; psys=psys->next, i++) {
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if(i == index)
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psys->flag |= PSYS_CURRENT;
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else
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psys->flag &= ~PSYS_CURRENT;
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}
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}
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Object *psys_find_object(Scene *scene, ParticleSystem *psys)
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{
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Base *base;
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ParticleSystem *tpsys;
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for(base = scene->base.first; base; base = base->next) {
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for(tpsys = base->object->particlesystem.first; psys; psys=psys->next) {
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if(tpsys == psys)
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return base->object;
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}
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}
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return NULL;
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}
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Object *psys_get_lattice(ParticleSimulationData *sim)
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{
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Object *lattice=NULL;
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if(psys_in_edit_mode(sim->scene, sim->psys)==0){
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ModifierData *md = (ModifierData*)psys_get_modifier(sim->ob, sim->psys);
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for(; md; md=md->next){
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if(md->type==eModifierType_Lattice){
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LatticeModifierData *lmd = (LatticeModifierData *)md;
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lattice=lmd->object;
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break;
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}
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}
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if(lattice)
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init_latt_deform(lattice, NULL);
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}
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return lattice;
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}
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void psys_disable_all(Object *ob)
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{
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ParticleSystem *psys=ob->particlesystem.first;
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for(; psys; psys=psys->next)
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psys->flag |= PSYS_DISABLED;
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}
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void psys_enable_all(Object *ob)
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{
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ParticleSystem *psys=ob->particlesystem.first;
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for(; psys; psys=psys->next)
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psys->flag &= ~PSYS_DISABLED;
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}
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int psys_in_edit_mode(Scene *scene, ParticleSystem *psys)
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{
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return (scene->basact && (scene->basact->object->mode & OB_MODE_PARTICLE_EDIT) && psys==psys_get_current((scene->basact)->object) && (psys->edit || psys->pointcache->edit) && !psys->renderdata);
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}
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static void psys_create_frand(ParticleSystem *psys)
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{
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int i;
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float *rand = psys->frand = MEM_callocN(PSYS_FRAND_COUNT * sizeof(float), "particle randoms");
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BLI_srandom(psys->seed);
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for(i=0; i<1024; i++, rand++)
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*rand = BLI_frand();
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}
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int psys_check_enabled(Object *ob, ParticleSystem *psys)
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{
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ParticleSystemModifierData *psmd;
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if(psys->flag & PSYS_DISABLED || psys->flag & PSYS_DELETE || !psys->part)
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return 0;
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psmd= psys_get_modifier(ob, psys);
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if(psys->renderdata || G.rendering) {
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if(!(psmd->modifier.mode & eModifierMode_Render))
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return 0;
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}
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else if(!(psmd->modifier.mode & eModifierMode_Realtime))
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return 0;
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/* perhaps not the perfect place, but we have to be sure the rands are there before usage */
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if(!psys->frand)
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psys_create_frand(psys);
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else if(psys->recalc & PSYS_RECALC_RESET) {
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MEM_freeN(psys->frand);
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psys_create_frand(psys);
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}
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return 1;
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}
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int psys_check_edited(ParticleSystem *psys)
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{
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if(psys->part && psys->part->type==PART_HAIR)
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return (psys->flag & PSYS_EDITED || (psys->edit && psys->edit->edited));
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else
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return (psys->pointcache->edit && psys->pointcache->edit->edited);
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}
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void psys_check_group_weights(ParticleSettings *part)
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{
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ParticleDupliWeight *dw, *tdw;
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GroupObject *go;
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int current = 0;
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if(part->ren_as == PART_DRAW_GR && part->dup_group && part->dup_group->gobject.first) {
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/* first remove all weights that don't have an object in the group */
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dw = part->dupliweights.first;
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while(dw) {
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if(!object_in_group(dw->ob, part->dup_group)) {
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tdw = dw->next;
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BLI_freelinkN(&part->dupliweights, dw);
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dw = tdw;
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}
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else
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dw = dw->next;
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}
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/* then add objects in the group to new list */
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go = part->dup_group->gobject.first;
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while(go) {
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dw = part->dupliweights.first;
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while(dw && dw->ob != go->ob)
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dw = dw->next;
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if(!dw) {
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dw = MEM_callocN(sizeof(ParticleDupliWeight), "ParticleDupliWeight");
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dw->ob = go->ob;
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dw->count = 1;
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BLI_addtail(&part->dupliweights, dw);
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}
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go = go->next;
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}
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dw = part->dupliweights.first;
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for(; dw; dw=dw->next) {
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if(dw->flag & PART_DUPLIW_CURRENT) {
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current = 1;
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break;
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}
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}
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if(!current) {
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dw = part->dupliweights.first;
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if(dw)
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dw->flag |= PART_DUPLIW_CURRENT;
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}
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}
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else {
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BLI_freelistN(&part->dupliweights);
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}
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}
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int psys_uses_gravity(ParticleSimulationData *sim)
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{
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return sim->scene->physics_settings.flag & PHYS_GLOBAL_GRAVITY && sim->psys->part && sim->psys->part->effector_weights->global_gravity != 0.0f;
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}
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/************************************************/
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/* Freeing stuff */
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/************************************************/
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static void fluid_free_settings(SPHFluidSettings *fluid)
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{
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if(fluid)
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MEM_freeN(fluid);
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}
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void psys_free_settings(ParticleSettings *part)
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{
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MTex *mtex;
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int a;
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BKE_free_animdata(&part->id);
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free_partdeflect(part->pd);
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free_partdeflect(part->pd2);
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if(part->effector_weights)
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MEM_freeN(part->effector_weights);
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BLI_freelistN(&part->dupliweights);
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boid_free_settings(part->boids);
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fluid_free_settings(part->fluid);
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for(a=0; a<MAX_MTEX; a++) {
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mtex= part->mtex[a];
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if(mtex && mtex->tex) mtex->tex->id.us--;
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if(mtex) MEM_freeN(mtex);
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}
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}
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void free_hair(Object *UNUSED(ob), ParticleSystem *psys, int dynamics)
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{
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PARTICLE_P;
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LOOP_PARTICLES {
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if(pa->hair)
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MEM_freeN(pa->hair);
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pa->hair = NULL;
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pa->totkey = 0;
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}
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psys->flag &= ~PSYS_HAIR_DONE;
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if(psys->clmd) {
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if(dynamics) {
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BKE_ptcache_free_list(&psys->ptcaches);
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psys->clmd->point_cache = psys->pointcache = NULL;
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psys->clmd->ptcaches.first = psys->clmd->ptcaches.last = NULL;
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modifier_free((ModifierData*)psys->clmd);
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psys->clmd = NULL;
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psys->pointcache = BKE_ptcache_add(&psys->ptcaches);
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}
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else {
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cloth_free_modifier(psys->clmd);
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}
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}
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if(psys->hair_in_dm)
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psys->hair_in_dm->release(psys->hair_in_dm);
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psys->hair_in_dm = NULL;
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if(psys->hair_out_dm)
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psys->hair_out_dm->release(psys->hair_out_dm);
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psys->hair_out_dm = NULL;
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}
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void free_keyed_keys(ParticleSystem *psys)
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{
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PARTICLE_P;
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if(psys->part->type == PART_HAIR)
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return;
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if(psys->particles && psys->particles->keys) {
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MEM_freeN(psys->particles->keys);
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LOOP_PARTICLES {
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if(pa->keys) {
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pa->keys= NULL;
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pa->totkey= 0;
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}
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}
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}
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}
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static void free_child_path_cache(ParticleSystem *psys)
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{
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psys_free_path_cache_buffers(psys->childcache, &psys->childcachebufs);
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psys->childcache = NULL;
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psys->totchildcache = 0;
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}
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void psys_free_path_cache(ParticleSystem *psys, PTCacheEdit *edit)
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{
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if(edit) {
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psys_free_path_cache_buffers(edit->pathcache, &edit->pathcachebufs);
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edit->pathcache= NULL;
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edit->totcached= 0;
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}
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if(psys) {
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psys_free_path_cache_buffers(psys->pathcache, &psys->pathcachebufs);
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psys->pathcache= NULL;
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psys->totcached= 0;
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free_child_path_cache(psys);
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}
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}
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void psys_free_children(ParticleSystem *psys)
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{
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if(psys->child) {
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MEM_freeN(psys->child);
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psys->child= NULL;
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psys->totchild=0;
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}
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free_child_path_cache(psys);
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}
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void psys_free_particles(ParticleSystem *psys)
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{
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PARTICLE_P;
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if(psys->particles) {
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if(psys->part->type==PART_HAIR) {
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LOOP_PARTICLES {
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if(pa->hair)
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MEM_freeN(pa->hair);
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}
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}
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if(psys->particles->keys)
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MEM_freeN(psys->particles->keys);
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if(psys->particles->boid)
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MEM_freeN(psys->particles->boid);
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MEM_freeN(psys->particles);
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psys->particles= NULL;
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psys->totpart= 0;
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}
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}
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void psys_free_pdd(ParticleSystem *psys)
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{
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if(psys->pdd) {
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if(psys->pdd->cdata)
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MEM_freeN(psys->pdd->cdata);
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psys->pdd->cdata = NULL;
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if(psys->pdd->vdata)
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MEM_freeN(psys->pdd->vdata);
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psys->pdd->vdata = NULL;
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if(psys->pdd->ndata)
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MEM_freeN(psys->pdd->ndata);
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psys->pdd->ndata = NULL;
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if(psys->pdd->vedata)
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MEM_freeN(psys->pdd->vedata);
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psys->pdd->vedata = NULL;
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psys->pdd->totpoint = 0;
|
|
psys->pdd->tot_vec_size = 0;
|
|
}
|
|
}
|
|
/* free everything */
|
|
void psys_free(Object *ob, ParticleSystem * psys)
|
|
{
|
|
if(psys){
|
|
int nr = 0;
|
|
ParticleSystem * tpsys;
|
|
|
|
psys_free_path_cache(psys, NULL);
|
|
|
|
free_hair(ob, psys, 1);
|
|
|
|
psys_free_particles(psys);
|
|
|
|
if(psys->edit && psys->free_edit)
|
|
psys->free_edit(psys->edit);
|
|
|
|
if(psys->child){
|
|
MEM_freeN(psys->child);
|
|
psys->child = NULL;
|
|
psys->totchild = 0;
|
|
}
|
|
|
|
// check if we are last non-visible particle system
|
|
for(tpsys=ob->particlesystem.first; tpsys; tpsys=tpsys->next){
|
|
if(tpsys->part)
|
|
{
|
|
if(ELEM(tpsys->part->ren_as,PART_DRAW_OB,PART_DRAW_GR))
|
|
{
|
|
nr++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// clear do-not-draw-flag
|
|
if(!nr)
|
|
ob->transflag &= ~OB_DUPLIPARTS;
|
|
|
|
if(psys->part){
|
|
psys->part->id.us--;
|
|
psys->part=NULL;
|
|
}
|
|
|
|
BKE_ptcache_free_list(&psys->ptcaches);
|
|
psys->pointcache = NULL;
|
|
|
|
BLI_freelistN(&psys->targets);
|
|
|
|
BLI_bvhtree_free(psys->bvhtree);
|
|
BLI_kdtree_free(psys->tree);
|
|
|
|
if(psys->fluid_springs)
|
|
MEM_freeN(psys->fluid_springs);
|
|
|
|
pdEndEffectors(&psys->effectors);
|
|
|
|
if(psys->frand)
|
|
MEM_freeN(psys->frand);
|
|
|
|
if(psys->pdd) {
|
|
psys_free_pdd(psys);
|
|
MEM_freeN(psys->pdd);
|
|
}
|
|
|
|
MEM_freeN(psys);
|
|
}
|
|
}
|
|
|
|
/************************************************/
|
|
/* Rendering */
|
|
/************************************************/
|
|
/* these functions move away particle data and bring it back after
|
|
* rendering, to make different render settings possible without
|
|
* removing the previous data. this should be solved properly once */
|
|
|
|
typedef struct ParticleRenderElem {
|
|
int curchild, totchild, reduce;
|
|
float lambda, t, scalemin, scalemax;
|
|
} ParticleRenderElem;
|
|
|
|
typedef struct ParticleRenderData {
|
|
ChildParticle *child;
|
|
ParticleCacheKey **pathcache;
|
|
ParticleCacheKey **childcache;
|
|
ListBase pathcachebufs, childcachebufs;
|
|
int totchild, totcached, totchildcache;
|
|
DerivedMesh *dm;
|
|
int totdmvert, totdmedge, totdmface;
|
|
|
|
float mat[4][4];
|
|
float viewmat[4][4], winmat[4][4];
|
|
int winx, winy;
|
|
|
|
int dosimplify;
|
|
int timeoffset;
|
|
ParticleRenderElem *elems;
|
|
int *origindex;
|
|
} ParticleRenderData;
|
|
|
|
static float psys_render_viewport_falloff(double rate, float dist, float width)
|
|
{
|
|
return pow(rate, dist/width);
|
|
}
|
|
|
|
static float psys_render_projected_area(ParticleSystem *psys, float *center, float area, double vprate, float *viewport)
|
|
{
|
|
ParticleRenderData *data= psys->renderdata;
|
|
float co[4], view[3], ortho1[3], ortho2[3], w, dx, dy, radius;
|
|
|
|
/* transform to view space */
|
|
VECCOPY(co, center);
|
|
co[3]= 1.0f;
|
|
mul_m4_v4(data->viewmat, co);
|
|
|
|
/* compute two vectors orthogonal to view vector */
|
|
normalize_v3_v3(view, co);
|
|
ortho_basis_v3v3_v3( ortho1, ortho2,view);
|
|
|
|
/* compute on screen minification */
|
|
w= co[2]*data->winmat[2][3] + data->winmat[3][3];
|
|
dx= data->winx*ortho2[0]*data->winmat[0][0];
|
|
dy= data->winy*ortho2[1]*data->winmat[1][1];
|
|
w= sqrt(dx*dx + dy*dy)/w;
|
|
|
|
/* w squared because we are working with area */
|
|
area= area*w*w;
|
|
|
|
/* viewport of the screen test */
|
|
|
|
/* project point on screen */
|
|
mul_m4_v4(data->winmat, co);
|
|
if(co[3] != 0.0f) {
|
|
co[0]= 0.5f*data->winx*(1.0f + co[0]/co[3]);
|
|
co[1]= 0.5f*data->winy*(1.0f + co[1]/co[3]);
|
|
}
|
|
|
|
/* screen space radius */
|
|
radius= sqrt(area/(float)M_PI);
|
|
|
|
/* make smaller using fallof once over screen edge */
|
|
*viewport= 1.0f;
|
|
|
|
if(co[0]+radius < 0.0f)
|
|
*viewport *= psys_render_viewport_falloff(vprate, -(co[0]+radius), data->winx);
|
|
else if(co[0]-radius > data->winx)
|
|
*viewport *= psys_render_viewport_falloff(vprate, (co[0]-radius) - data->winx, data->winx);
|
|
|
|
if(co[1]+radius < 0.0f)
|
|
*viewport *= psys_render_viewport_falloff(vprate, -(co[1]+radius), data->winy);
|
|
else if(co[1]-radius > data->winy)
|
|
*viewport *= psys_render_viewport_falloff(vprate, (co[1]-radius) - data->winy, data->winy);
|
|
|
|
return area;
|
|
}
|
|
|
|
void psys_render_set(Object *ob, ParticleSystem *psys, float viewmat[][4], float winmat[][4], int winx, int winy, int timeoffset)
|
|
{
|
|
ParticleRenderData*data;
|
|
ParticleSystemModifierData *psmd= psys_get_modifier(ob, psys);
|
|
|
|
if(!G.rendering)
|
|
return;
|
|
if(psys->renderdata)
|
|
return;
|
|
|
|
data= MEM_callocN(sizeof(ParticleRenderData), "ParticleRenderData");
|
|
|
|
data->child= psys->child;
|
|
data->totchild= psys->totchild;
|
|
data->pathcache= psys->pathcache;
|
|
data->pathcachebufs.first = psys->pathcachebufs.first;
|
|
data->pathcachebufs.last = psys->pathcachebufs.last;
|
|
data->totcached= psys->totcached;
|
|
data->childcache= psys->childcache;
|
|
data->childcachebufs.first = psys->childcachebufs.first;
|
|
data->childcachebufs.last = psys->childcachebufs.last;
|
|
data->totchildcache= psys->totchildcache;
|
|
|
|
if(psmd->dm)
|
|
data->dm= CDDM_copy(psmd->dm);
|
|
data->totdmvert= psmd->totdmvert;
|
|
data->totdmedge= psmd->totdmedge;
|
|
data->totdmface= psmd->totdmface;
|
|
|
|
psys->child= NULL;
|
|
psys->pathcache= NULL;
|
|
psys->childcache= NULL;
|
|
psys->totchild= psys->totcached= psys->totchildcache= 0;
|
|
psys->pathcachebufs.first = psys->pathcachebufs.last = NULL;
|
|
psys->childcachebufs.first = psys->childcachebufs.last = NULL;
|
|
|
|
copy_m4_m4(data->winmat, winmat);
|
|
mul_m4_m4m4(data->viewmat, ob->obmat, viewmat);
|
|
mul_m4_m4m4(data->mat, data->viewmat, winmat);
|
|
data->winx= winx;
|
|
data->winy= winy;
|
|
|
|
data->timeoffset= timeoffset;
|
|
|
|
psys->renderdata= data;
|
|
|
|
/* Hair can and has to be recalculated if everything isn't displayed. */
|
|
if(psys->part->disp != 100 && psys->part->type == PART_HAIR)
|
|
psys->recalc |= PSYS_RECALC_RESET;
|
|
}
|
|
|
|
void psys_render_restore(Object *ob, ParticleSystem *psys)
|
|
{
|
|
ParticleRenderData*data;
|
|
ParticleSystemModifierData *psmd= psys_get_modifier(ob, psys);
|
|
|
|
data= psys->renderdata;
|
|
if(!data)
|
|
return;
|
|
|
|
if(data->elems)
|
|
MEM_freeN(data->elems);
|
|
|
|
if(psmd->dm) {
|
|
psmd->dm->needsFree= 1;
|
|
psmd->dm->release(psmd->dm);
|
|
}
|
|
|
|
psys_free_path_cache(psys, NULL);
|
|
|
|
if(psys->child){
|
|
MEM_freeN(psys->child);
|
|
psys->child= 0;
|
|
psys->totchild= 0;
|
|
}
|
|
|
|
psys->child= data->child;
|
|
psys->totchild= data->totchild;
|
|
psys->pathcache= data->pathcache;
|
|
psys->pathcachebufs.first = data->pathcachebufs.first;
|
|
psys->pathcachebufs.last = data->pathcachebufs.last;
|
|
psys->totcached= data->totcached;
|
|
psys->childcache= data->childcache;
|
|
psys->childcachebufs.first = data->childcachebufs.first;
|
|
psys->childcachebufs.last = data->childcachebufs.last;
|
|
psys->totchildcache= data->totchildcache;
|
|
|
|
psmd->dm= data->dm;
|
|
psmd->totdmvert= data->totdmvert;
|
|
psmd->totdmedge= data->totdmedge;
|
|
psmd->totdmface= data->totdmface;
|
|
psmd->flag &= ~eParticleSystemFlag_psys_updated;
|
|
|
|
if(psmd->dm)
|
|
psys_calc_dmcache(ob, psmd->dm, psys);
|
|
|
|
MEM_freeN(data);
|
|
psys->renderdata= NULL;
|
|
}
|
|
|
|
int psys_render_simplify_distribution(ParticleThreadContext *ctx, int tot)
|
|
{
|
|
DerivedMesh *dm= ctx->dm;
|
|
Mesh *me= (Mesh*)(ctx->sim.ob->data);
|
|
MFace *mf, *mface;
|
|
MVert *mvert;
|
|
ParticleRenderData *data;
|
|
ParticleRenderElem *elems, *elem;
|
|
ParticleSettings *part= ctx->sim.psys->part;
|
|
float *facearea, (*facecenter)[3], size[3], fac, powrate, scaleclamp;
|
|
float co1[3], co2[3], co3[3], co4[3], lambda, arearatio, t, area, viewport;
|
|
double vprate;
|
|
int *origindex, *facetotvert;
|
|
int a, b, totorigface, totface, newtot, skipped;
|
|
|
|
if(part->ren_as!=PART_DRAW_PATH || !(part->draw & PART_DRAW_REN_STRAND))
|
|
return tot;
|
|
if(!ctx->sim.psys->renderdata)
|
|
return tot;
|
|
|
|
data= ctx->sim.psys->renderdata;
|
|
if(data->timeoffset)
|
|
return 0;
|
|
if(!(part->simplify_flag & PART_SIMPLIFY_ENABLE))
|
|
return tot;
|
|
|
|
mvert= dm->getVertArray(dm);
|
|
mface= dm->getFaceArray(dm);
|
|
origindex= dm->getFaceDataArray(dm, CD_ORIGINDEX);
|
|
totface= dm->getNumFaces(dm);
|
|
totorigface= me->totface;
|
|
|
|
if(totface == 0 || totorigface == 0)
|
|
return tot;
|
|
|
|
facearea= MEM_callocN(sizeof(float)*totorigface, "SimplifyFaceArea");
|
|
facecenter= MEM_callocN(sizeof(float[3])*totorigface, "SimplifyFaceCenter");
|
|
facetotvert= MEM_callocN(sizeof(int)*totorigface, "SimplifyFaceArea");
|
|
elems= MEM_callocN(sizeof(ParticleRenderElem)*totorigface, "SimplifyFaceElem");
|
|
|
|
if(data->elems)
|
|
MEM_freeN(data->elems);
|
|
|
|
data->dosimplify= 1;
|
|
data->elems= elems;
|
|
data->origindex= origindex;
|
|
|
|
/* compute number of children per original face */
|
|
for(a=0; a<tot; a++) {
|
|
b= (origindex)? origindex[ctx->index[a]]: ctx->index[a];
|
|
if(b != -1)
|
|
elems[b].totchild++;
|
|
}
|
|
|
|
/* compute areas and centers of original faces */
|
|
for(mf=mface, a=0; a<totface; a++, mf++) {
|
|
b= (origindex)? origindex[a]: a;
|
|
|
|
if(b != -1) {
|
|
VECCOPY(co1, mvert[mf->v1].co);
|
|
VECCOPY(co2, mvert[mf->v2].co);
|
|
VECCOPY(co3, mvert[mf->v3].co);
|
|
|
|
VECADD(facecenter[b], facecenter[b], co1);
|
|
VECADD(facecenter[b], facecenter[b], co2);
|
|
VECADD(facecenter[b], facecenter[b], co3);
|
|
|
|
if(mf->v4) {
|
|
VECCOPY(co4, mvert[mf->v4].co);
|
|
VECADD(facecenter[b], facecenter[b], co4);
|
|
facearea[b] += area_quad_v3(co1, co2, co3, co4);
|
|
facetotvert[b] += 4;
|
|
}
|
|
else {
|
|
facearea[b] += area_tri_v3(co1, co2, co3);
|
|
facetotvert[b] += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(a=0; a<totorigface; a++)
|
|
if(facetotvert[a] > 0)
|
|
mul_v3_fl(facecenter[a], 1.0f/facetotvert[a]);
|
|
|
|
/* for conversion from BU area / pixel area to reference screen size */
|
|
mesh_get_texspace(me, 0, 0, size);
|
|
fac= ((size[0] + size[1] + size[2])/3.0f)/part->simplify_refsize;
|
|
fac= fac*fac;
|
|
|
|
powrate= log(0.5f)/log(part->simplify_rate*0.5f);
|
|
if(part->simplify_flag & PART_SIMPLIFY_VIEWPORT)
|
|
vprate= pow(1.0f - part->simplify_viewport, 5.0);
|
|
else
|
|
vprate= 1.0;
|
|
|
|
/* set simplification parameters per original face */
|
|
for(a=0, elem=elems; a<totorigface; a++, elem++) {
|
|
area = psys_render_projected_area(ctx->sim.psys, facecenter[a], facearea[a], vprate, &viewport);
|
|
arearatio= fac*area/facearea[a];
|
|
|
|
if((arearatio < 1.0f || viewport < 1.0f) && elem->totchild) {
|
|
/* lambda is percentage of elements to keep */
|
|
lambda= (arearatio < 1.0f)? powf(arearatio, powrate): 1.0f;
|
|
lambda *= viewport;
|
|
|
|
lambda= MAX2(lambda, 1.0f/elem->totchild);
|
|
|
|
/* compute transition region */
|
|
t= part->simplify_transition;
|
|
elem->t= (lambda-t < 0.0f)? lambda: (lambda+t > 1.0f)? 1.0f-lambda: t;
|
|
elem->reduce= 1;
|
|
|
|
/* scale at end and beginning of the transition region */
|
|
elem->scalemax= (lambda+t < 1.0f)? 1.0f/lambda: 1.0f/(1.0f - elem->t*elem->t/t);
|
|
elem->scalemin= (lambda+t < 1.0f)? 0.0f: elem->scalemax*(1.0f-elem->t/t);
|
|
|
|
elem->scalemin= sqrt(elem->scalemin);
|
|
elem->scalemax= sqrt(elem->scalemax);
|
|
|
|
/* clamp scaling */
|
|
scaleclamp= MIN2(elem->totchild, 10.0f);
|
|
elem->scalemin= MIN2(scaleclamp, elem->scalemin);
|
|
elem->scalemax= MIN2(scaleclamp, elem->scalemax);
|
|
|
|
/* extend lambda to include transition */
|
|
lambda= lambda + elem->t;
|
|
if(lambda > 1.0f)
|
|
lambda= 1.0f;
|
|
}
|
|
else {
|
|
lambda= arearatio;
|
|
|
|
elem->scalemax= 1.0f; //sqrt(lambda);
|
|
elem->scalemin= 1.0f; //sqrt(lambda);
|
|
elem->reduce= 0;
|
|
}
|
|
|
|
elem->lambda= lambda;
|
|
elem->scalemin= sqrt(elem->scalemin);
|
|
elem->scalemax= sqrt(elem->scalemax);
|
|
elem->curchild= 0;
|
|
}
|
|
|
|
MEM_freeN(facearea);
|
|
MEM_freeN(facecenter);
|
|
MEM_freeN(facetotvert);
|
|
|
|
/* move indices and set random number skipping */
|
|
ctx->skip= MEM_callocN(sizeof(int)*tot, "SimplificationSkip");
|
|
|
|
skipped= 0;
|
|
for(a=0, newtot=0; a<tot; a++) {
|
|
b= (origindex)? origindex[ctx->index[a]]: ctx->index[a];
|
|
if(b != -1) {
|
|
if(elems[b].curchild++ < ceil(elems[b].lambda*elems[b].totchild)) {
|
|
ctx->index[newtot]= ctx->index[a];
|
|
ctx->skip[newtot]= skipped;
|
|
skipped= 0;
|
|
newtot++;
|
|
}
|
|
else skipped++;
|
|
}
|
|
else skipped++;
|
|
}
|
|
|
|
for(a=0, elem=elems; a<totorigface; a++, elem++)
|
|
elem->curchild= 0;
|
|
|
|
return newtot;
|
|
}
|
|
|
|
int psys_render_simplify_params(ParticleSystem *psys, ChildParticle *cpa, float *params)
|
|
{
|
|
ParticleRenderData *data;
|
|
ParticleRenderElem *elem;
|
|
float x, w, scale, alpha, lambda, t, scalemin, scalemax;
|
|
int b;
|
|
|
|
if(!(psys->renderdata && (psys->part->simplify_flag & PART_SIMPLIFY_ENABLE)))
|
|
return 0;
|
|
|
|
data= psys->renderdata;
|
|
if(!data->dosimplify)
|
|
return 0;
|
|
|
|
b= (data->origindex)? data->origindex[cpa->num]: cpa->num;
|
|
if(b == -1)
|
|
return 0;
|
|
|
|
elem= &data->elems[b];
|
|
|
|
lambda= elem->lambda;
|
|
t= elem->t;
|
|
scalemin= elem->scalemin;
|
|
scalemax= elem->scalemax;
|
|
|
|
if(!elem->reduce) {
|
|
scale= scalemin;
|
|
alpha= 1.0f;
|
|
}
|
|
else {
|
|
x= (elem->curchild+0.5f)/elem->totchild;
|
|
if(x < lambda-t) {
|
|
scale= scalemax;
|
|
alpha= 1.0f;
|
|
}
|
|
else if(x >= lambda+t) {
|
|
scale= scalemin;
|
|
alpha= 0.0f;
|
|
}
|
|
else {
|
|
w= (lambda+t - x)/(2.0f*t);
|
|
scale= scalemin + (scalemax - scalemin)*w;
|
|
alpha= w;
|
|
}
|
|
}
|
|
|
|
params[0]= scale;
|
|
params[1]= alpha;
|
|
|
|
elem->curchild++;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/************************************************/
|
|
/* Interpolation */
|
|
/************************************************/
|
|
static float interpolate_particle_value(float v1, float v2, float v3, float v4, float *w, int four)
|
|
{
|
|
float value;
|
|
|
|
value= w[0]*v1 + w[1]*v2 + w[2]*v3;
|
|
if(four)
|
|
value += w[3]*v4;
|
|
|
|
CLAMP(value, 0.f, 1.f);
|
|
|
|
return value;
|
|
}
|
|
|
|
void psys_interpolate_particle(short type, ParticleKey keys[4], float dt, ParticleKey *result, int velocity)
|
|
{
|
|
float t[4];
|
|
|
|
if(type<0) {
|
|
interp_cubic_v3( result->co, result->vel,keys[1].co, keys[1].vel, keys[2].co, keys[2].vel, dt);
|
|
}
|
|
else {
|
|
key_curve_position_weights(dt, t, type);
|
|
|
|
interp_v3_v3v3v3v3(result->co, keys[0].co, keys[1].co, keys[2].co, keys[3].co, t);
|
|
|
|
if(velocity){
|
|
float temp[3];
|
|
|
|
if(dt>0.999f){
|
|
key_curve_position_weights(dt-0.001f, t, type);
|
|
interp_v3_v3v3v3v3(temp, keys[0].co, keys[1].co, keys[2].co, keys[3].co, t);
|
|
VECSUB(result->vel, result->co, temp);
|
|
}
|
|
else{
|
|
key_curve_position_weights(dt+0.001f, t, type);
|
|
interp_v3_v3v3v3v3(temp, keys[0].co, keys[1].co, keys[2].co, keys[3].co, t);
|
|
VECSUB(result->vel, temp, result->co);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
typedef struct ParticleInterpolationData {
|
|
HairKey *hkey[2];
|
|
|
|
DerivedMesh *dm;
|
|
MVert *mvert[2];
|
|
|
|
int keyed;
|
|
ParticleKey *kkey[2];
|
|
|
|
PointCache *cache;
|
|
PTCacheMem *pm;
|
|
|
|
PTCacheEditPoint *epoint;
|
|
PTCacheEditKey *ekey[2];
|
|
|
|
float birthtime, dietime;
|
|
int bspline;
|
|
} ParticleInterpolationData;
|
|
/* Assumes pointcache->mem_cache exists, so for disk cached particles call psys_make_temp_pointcache() before use */
|
|
/* It uses ParticleInterpolationData->pm to store the current memory cache frame so it's thread safe. */
|
|
static void get_pointcache_keys_for_time(Object *UNUSED(ob), PointCache *cache, PTCacheMem **cur, int index, float t, ParticleKey *key1, ParticleKey *key2)
|
|
{
|
|
static PTCacheMem *pm = NULL;
|
|
int index1, index2;
|
|
|
|
if(index < 0) { /* initialize */
|
|
*cur = cache->mem_cache.first;
|
|
|
|
if(*cur)
|
|
*cur = (*cur)->next;
|
|
}
|
|
else {
|
|
if(*cur) {
|
|
while(*cur && (*cur)->next && (float)(*cur)->frame < t)
|
|
*cur = (*cur)->next;
|
|
|
|
pm = *cur;
|
|
|
|
index2 = BKE_ptcache_mem_index_find(pm, index);
|
|
index1 = BKE_ptcache_mem_index_find(pm->prev, index);
|
|
|
|
BKE_ptcache_make_particle_key(key2, index2, pm->data, (float)pm->frame);
|
|
if(index1 < 0)
|
|
copy_particle_key(key1, key2, 1);
|
|
else
|
|
BKE_ptcache_make_particle_key(key1, index1, pm->prev->data, (float)pm->prev->frame);
|
|
}
|
|
else if(cache->mem_cache.first) {
|
|
pm = cache->mem_cache.first;
|
|
index2 = BKE_ptcache_mem_index_find(pm, index);
|
|
BKE_ptcache_make_particle_key(key2, index2, pm->data, (float)pm->frame);
|
|
copy_particle_key(key1, key2, 1);
|
|
}
|
|
}
|
|
}
|
|
static int get_pointcache_times_for_particle(PointCache *cache, int index, float *start, float *end)
|
|
{
|
|
PTCacheMem *pm;
|
|
int ret = 0;
|
|
|
|
for(pm=cache->mem_cache.first; pm; pm=pm->next) {
|
|
if(BKE_ptcache_mem_index_find(pm, index) >= 0) {
|
|
*start = pm->frame;
|
|
ret++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for(pm=cache->mem_cache.last; pm; pm=pm->prev) {
|
|
if(BKE_ptcache_mem_index_find(pm, index) >= 0) {
|
|
*end = pm->frame;
|
|
ret++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret == 2;
|
|
}
|
|
|
|
float psys_get_dietime_from_cache(PointCache *cache, int index) {
|
|
PTCacheMem *pm;
|
|
int dietime = 10000000; /* some max value so that we can default to pa->time+lifetime */
|
|
|
|
for(pm=cache->mem_cache.last; pm; pm=pm->prev) {
|
|
if(BKE_ptcache_mem_index_find(pm, index) >= 0)
|
|
return (float)pm->frame;
|
|
}
|
|
|
|
return (float)dietime;
|
|
}
|
|
|
|
static void init_particle_interpolation(Object *ob, ParticleSystem *psys, ParticleData *pa, ParticleInterpolationData *pind)
|
|
{
|
|
|
|
if(pind->epoint) {
|
|
PTCacheEditPoint *point = pind->epoint;
|
|
|
|
pind->ekey[0] = point->keys;
|
|
pind->ekey[1] = point->totkey > 1 ? point->keys + 1 : NULL;
|
|
|
|
pind->birthtime = *(point->keys->time);
|
|
pind->dietime = *((point->keys + point->totkey - 1)->time);
|
|
}
|
|
else if(pind->keyed) {
|
|
ParticleKey *key = pa->keys;
|
|
pind->kkey[0] = key;
|
|
pind->kkey[1] = pa->totkey > 1 ? key + 1 : NULL;
|
|
|
|
pind->birthtime = key->time;
|
|
pind->dietime = (key + pa->totkey - 1)->time;
|
|
}
|
|
else if(pind->cache) {
|
|
float start=0.0f, end=0.0f;
|
|
get_pointcache_keys_for_time(ob, pind->cache, &pind->pm, -1, 0.0f, NULL, NULL);
|
|
pind->birthtime = pa ? pa->time : pind->cache->startframe;
|
|
pind->dietime = pa ? pa->dietime : pind->cache->endframe;
|
|
|
|
if(get_pointcache_times_for_particle(pind->cache, pa - psys->particles, &start, &end)) {
|
|
pind->birthtime = MAX2(pind->birthtime, start);
|
|
pind->dietime = MIN2(pind->dietime, end);
|
|
}
|
|
}
|
|
else {
|
|
HairKey *key = pa->hair;
|
|
pind->hkey[0] = key;
|
|
pind->hkey[1] = key + 1;
|
|
|
|
pind->birthtime = key->time;
|
|
pind->dietime = (key + pa->totkey - 1)->time;
|
|
|
|
if(pind->dm) {
|
|
pind->mvert[0] = CDDM_get_vert(pind->dm, pa->hair_index);
|
|
pind->mvert[1] = pind->mvert[0] + 1;
|
|
}
|
|
}
|
|
}
|
|
static void edit_to_particle(ParticleKey *key, PTCacheEditKey *ekey)
|
|
{
|
|
VECCOPY(key->co, ekey->co);
|
|
if(ekey->vel) {
|
|
VECCOPY(key->vel, ekey->vel);
|
|
}
|
|
key->time = *(ekey->time);
|
|
}
|
|
static void hair_to_particle(ParticleKey *key, HairKey *hkey)
|
|
{
|
|
VECCOPY(key->co, hkey->co);
|
|
key->time = hkey->time;
|
|
}
|
|
|
|
static void mvert_to_particle(ParticleKey *key, MVert *mvert, HairKey *hkey)
|
|
{
|
|
VECCOPY(key->co, mvert->co);
|
|
key->time = hkey->time;
|
|
}
|
|
|
|
static void do_particle_interpolation(ParticleSystem *psys, int p, ParticleData *pa, float t, ParticleInterpolationData *pind, ParticleKey *result)
|
|
{
|
|
PTCacheEditPoint *point = pind->epoint;
|
|
ParticleKey keys[4];
|
|
int point_vel = (point && point->keys->vel);
|
|
float real_t, dfra, keytime, invdt = 1.f;
|
|
|
|
/* billboards wont fill in all of these, so start cleared */
|
|
memset(keys, 0, sizeof(keys));
|
|
|
|
/* interpret timing and find keys */
|
|
if(point) {
|
|
if(result->time < 0.0f)
|
|
real_t = -result->time;
|
|
else
|
|
real_t = *(pind->ekey[0]->time) + t * (*(pind->ekey[0][point->totkey-1].time) - *(pind->ekey[0]->time));
|
|
|
|
while(*(pind->ekey[1]->time) < real_t)
|
|
pind->ekey[1]++;
|
|
|
|
pind->ekey[0] = pind->ekey[1] - 1;
|
|
}
|
|
else if(pind->keyed) {
|
|
/* we have only one key, so let's use that */
|
|
if(pind->kkey[1]==NULL) {
|
|
copy_particle_key(result, pind->kkey[0], 1);
|
|
return;
|
|
}
|
|
|
|
if(result->time < 0.0f)
|
|
real_t = -result->time;
|
|
else
|
|
real_t = pind->kkey[0]->time + t * (pind->kkey[0][pa->totkey-1].time - pind->kkey[0]->time);
|
|
|
|
if(psys->part->phystype==PART_PHYS_KEYED && psys->flag & PSYS_KEYED_TIMING) {
|
|
ParticleTarget *pt = psys->targets.first;
|
|
|
|
pt=pt->next;
|
|
|
|
while(pt && pa->time + pt->time < real_t)
|
|
pt= pt->next;
|
|
|
|
if(pt) {
|
|
pt=pt->prev;
|
|
|
|
if(pa->time + pt->time + pt->duration > real_t)
|
|
real_t = pa->time + pt->time;
|
|
}
|
|
else
|
|
real_t = pa->time + ((ParticleTarget*)psys->targets.last)->time;
|
|
}
|
|
|
|
CLAMP(real_t, pa->time, pa->dietime);
|
|
|
|
while(pind->kkey[1]->time < real_t)
|
|
pind->kkey[1]++;
|
|
|
|
pind->kkey[0] = pind->kkey[1] - 1;
|
|
}
|
|
else if(pind->cache) {
|
|
if(result->time < 0.0f) /* flag for time in frames */
|
|
real_t = -result->time;
|
|
else
|
|
real_t = pa->time + t * (pa->dietime - pa->time);
|
|
}
|
|
else {
|
|
if(result->time < 0.0f)
|
|
real_t = -result->time;
|
|
else
|
|
real_t = pind->hkey[0]->time + t * (pind->hkey[0][pa->totkey-1].time - pind->hkey[0]->time);
|
|
|
|
while(pind->hkey[1]->time < real_t) {
|
|
pind->hkey[1]++;
|
|
pind->mvert[1]++;
|
|
}
|
|
|
|
pind->hkey[0] = pind->hkey[1] - 1;
|
|
}
|
|
|
|
/* set actual interpolation keys */
|
|
if(point) {
|
|
edit_to_particle(keys + 1, pind->ekey[0]);
|
|
edit_to_particle(keys + 2, pind->ekey[1]);
|
|
}
|
|
else if(pind->dm) {
|
|
pind->mvert[0] = pind->mvert[1] - 1;
|
|
mvert_to_particle(keys + 1, pind->mvert[0], pind->hkey[0]);
|
|
mvert_to_particle(keys + 2, pind->mvert[1], pind->hkey[1]);
|
|
}
|
|
else if(pind->keyed) {
|
|
memcpy(keys + 1, pind->kkey[0], sizeof(ParticleKey));
|
|
memcpy(keys + 2, pind->kkey[1], sizeof(ParticleKey));
|
|
}
|
|
else if(pind->cache) {
|
|
get_pointcache_keys_for_time(NULL, pind->cache, &pind->pm, p, real_t, keys+1, keys+2);
|
|
}
|
|
else {
|
|
hair_to_particle(keys + 1, pind->hkey[0]);
|
|
hair_to_particle(keys + 2, pind->hkey[1]);
|
|
}
|
|
|
|
/* set secondary interpolation keys for hair */
|
|
if(!pind->keyed && !pind->cache && !point_vel) {
|
|
if(point) {
|
|
if(pind->ekey[0] != point->keys)
|
|
edit_to_particle(keys, pind->ekey[0] - 1);
|
|
else
|
|
edit_to_particle(keys, pind->ekey[0]);
|
|
}
|
|
else if(pind->dm) {
|
|
if(pind->hkey[0] != pa->hair)
|
|
mvert_to_particle(keys, pind->mvert[0] - 1, pind->hkey[0] - 1);
|
|
else
|
|
mvert_to_particle(keys, pind->mvert[0], pind->hkey[0]);
|
|
}
|
|
else {
|
|
if(pind->hkey[0] != pa->hair)
|
|
hair_to_particle(keys, pind->hkey[0] - 1);
|
|
else
|
|
hair_to_particle(keys, pind->hkey[0]);
|
|
}
|
|
|
|
if(point) {
|
|
if(pind->ekey[1] != point->keys + point->totkey - 1)
|
|
edit_to_particle(keys + 3, pind->ekey[1] + 1);
|
|
else
|
|
edit_to_particle(keys + 3, pind->ekey[1]);
|
|
}
|
|
else if(pind->dm) {
|
|
if(pind->hkey[1] != pa->hair + pa->totkey - 1)
|
|
mvert_to_particle(keys + 3, pind->mvert[1] + 1, pind->hkey[1] + 1);
|
|
else
|
|
mvert_to_particle(keys + 3, pind->mvert[1], pind->hkey[1]);
|
|
}
|
|
else {
|
|
if(pind->hkey[1] != pa->hair + pa->totkey - 1)
|
|
hair_to_particle(keys + 3, pind->hkey[1] + 1);
|
|
else
|
|
hair_to_particle(keys + 3, pind->hkey[1]);
|
|
}
|
|
}
|
|
|
|
dfra = keys[2].time - keys[1].time;
|
|
keytime = (real_t - keys[1].time) / dfra;
|
|
|
|
/* convert velocity to timestep size */
|
|
if(pind->keyed || pind->cache || point_vel){
|
|
invdt = dfra * 0.04f * (psys ? psys->part->timetweak : 1.f);
|
|
mul_v3_fl(keys[1].vel, invdt);
|
|
mul_v3_fl(keys[2].vel, invdt);
|
|
interp_qt_qtqt(result->rot,keys[1].rot,keys[2].rot,keytime);
|
|
}
|
|
|
|
/* now we should have in chronologiacl order k1<=k2<=t<=k3<=k4 with keytime between [0,1]->[k2,k3] (k1 & k4 used for cardinal & bspline interpolation)*/
|
|
psys_interpolate_particle((pind->keyed || pind->cache || point_vel) ? -1 /* signal for cubic interpolation */
|
|
: (pind->bspline ? KEY_BSPLINE : KEY_CARDINAL)
|
|
,keys, keytime, result, 1);
|
|
|
|
/* the velocity needs to be converted back from cubic interpolation */
|
|
if(pind->keyed || pind->cache || point_vel)
|
|
mul_v3_fl(result->vel, 1.f/invdt);
|
|
}
|
|
/************************************************/
|
|
/* Particles on a dm */
|
|
/************************************************/
|
|
/* interpolate a location on a face based on face coordinates */
|
|
void psys_interpolate_face(MVert *mvert, MFace *mface, MTFace *tface, float (*orcodata)[3], float *w, float *vec, float *nor, float *utan, float *vtan, float *orco,float *ornor){
|
|
float *v1=0, *v2=0, *v3=0, *v4=0;
|
|
float e1[3],e2[3],s1,s2,t1,t2;
|
|
float *uv1, *uv2, *uv3, *uv4;
|
|
float n1[3], n2[3], n3[3], n4[3];
|
|
float tuv[4][2];
|
|
float *o1, *o2, *o3, *o4;
|
|
|
|
v1= mvert[mface->v1].co;
|
|
v2= mvert[mface->v2].co;
|
|
v3= mvert[mface->v3].co;
|
|
|
|
normal_short_to_float_v3(n1, mvert[mface->v1].no);
|
|
normal_short_to_float_v3(n2, mvert[mface->v2].no);
|
|
normal_short_to_float_v3(n3, mvert[mface->v3].no);
|
|
|
|
if(mface->v4) {
|
|
v4= mvert[mface->v4].co;
|
|
normal_short_to_float_v3(n4, mvert[mface->v4].no);
|
|
|
|
interp_v3_v3v3v3v3(vec, v1, v2, v3, v4, w);
|
|
|
|
if(nor){
|
|
if(mface->flag & ME_SMOOTH)
|
|
interp_v3_v3v3v3v3(nor, n1, n2, n3, n4, w);
|
|
else
|
|
normal_quad_v3(nor,v1,v2,v3,v4);
|
|
}
|
|
}
|
|
else {
|
|
interp_v3_v3v3v3(vec, v1, v2, v3, w);
|
|
|
|
if(nor){
|
|
if(mface->flag & ME_SMOOTH)
|
|
interp_v3_v3v3v3(nor, n1, n2, n3, w);
|
|
else
|
|
normal_tri_v3(nor,v1,v2,v3);
|
|
}
|
|
}
|
|
|
|
/* calculate tangent vectors */
|
|
if(utan && vtan){
|
|
if(tface){
|
|
uv1= tface->uv[0];
|
|
uv2= tface->uv[1];
|
|
uv3= tface->uv[2];
|
|
uv4= tface->uv[3];
|
|
}
|
|
else{
|
|
uv1= tuv[0]; uv2= tuv[1]; uv3= tuv[2]; uv4= tuv[3];
|
|
map_to_sphere( uv1, uv1+1,v1[0], v1[1], v1[2]);
|
|
map_to_sphere( uv2, uv2+1,v2[0], v2[1], v2[2]);
|
|
map_to_sphere( uv3, uv3+1,v3[0], v3[1], v3[2]);
|
|
if(v4)
|
|
map_to_sphere( uv4, uv4+1,v4[0], v4[1], v4[2]);
|
|
}
|
|
|
|
if(v4){
|
|
s1= uv3[0] - uv1[0];
|
|
s2= uv4[0] - uv1[0];
|
|
|
|
t1= uv3[1] - uv1[1];
|
|
t2= uv4[1] - uv1[1];
|
|
|
|
sub_v3_v3v3(e1, v3, v1);
|
|
sub_v3_v3v3(e2, v4, v1);
|
|
}
|
|
else{
|
|
s1= uv2[0] - uv1[0];
|
|
s2= uv3[0] - uv1[0];
|
|
|
|
t1= uv2[1] - uv1[1];
|
|
t2= uv3[1] - uv1[1];
|
|
|
|
sub_v3_v3v3(e1, v2, v1);
|
|
sub_v3_v3v3(e2, v3, v1);
|
|
}
|
|
|
|
vtan[0] = (s1*e2[0] - s2*e1[0]);
|
|
vtan[1] = (s1*e2[1] - s2*e1[1]);
|
|
vtan[2] = (s1*e2[2] - s2*e1[2]);
|
|
|
|
utan[0] = (t1*e2[0] - t2*e1[0]);
|
|
utan[1] = (t1*e2[1] - t2*e1[1]);
|
|
utan[2] = (t1*e2[2] - t2*e1[2]);
|
|
}
|
|
|
|
if(orco) {
|
|
if(orcodata) {
|
|
o1= orcodata[mface->v1];
|
|
o2= orcodata[mface->v2];
|
|
o3= orcodata[mface->v3];
|
|
|
|
if(mface->v4) {
|
|
o4= orcodata[mface->v4];
|
|
|
|
interp_v3_v3v3v3v3(orco, o1, o2, o3, o4, w);
|
|
|
|
if(ornor)
|
|
normal_quad_v3( ornor,o1, o2, o3, o4);
|
|
}
|
|
else {
|
|
interp_v3_v3v3v3(orco, o1, o2, o3, w);
|
|
|
|
if(ornor)
|
|
normal_tri_v3( ornor,o1, o2, o3);
|
|
}
|
|
}
|
|
else {
|
|
VECCOPY(orco, vec);
|
|
if(ornor && nor)
|
|
VECCOPY(ornor, nor);
|
|
}
|
|
}
|
|
}
|
|
void psys_interpolate_uvs(MTFace *tface, int quad, float *w, float *uvco)
|
|
{
|
|
float v10= tface->uv[0][0];
|
|
float v11= tface->uv[0][1];
|
|
float v20= tface->uv[1][0];
|
|
float v21= tface->uv[1][1];
|
|
float v30= tface->uv[2][0];
|
|
float v31= tface->uv[2][1];
|
|
float v40,v41;
|
|
|
|
if(quad) {
|
|
v40= tface->uv[3][0];
|
|
v41= tface->uv[3][1];
|
|
|
|
uvco[0]= w[0]*v10 + w[1]*v20 + w[2]*v30 + w[3]*v40;
|
|
uvco[1]= w[0]*v11 + w[1]*v21 + w[2]*v31 + w[3]*v41;
|
|
}
|
|
else {
|
|
uvco[0]= w[0]*v10 + w[1]*v20 + w[2]*v30;
|
|
uvco[1]= w[0]*v11 + w[1]*v21 + w[2]*v31;
|
|
}
|
|
}
|
|
|
|
void psys_interpolate_mcol(MCol *mcol, int quad, float *w, MCol *mc)
|
|
{
|
|
char *cp, *cp1, *cp2, *cp3, *cp4;
|
|
|
|
cp= (char *)mc;
|
|
cp1= (char *)&mcol[0];
|
|
cp2= (char *)&mcol[1];
|
|
cp3= (char *)&mcol[2];
|
|
|
|
if(quad) {
|
|
cp4= (char *)&mcol[3];
|
|
|
|
cp[0]= (int)(w[0]*cp1[0] + w[1]*cp2[0] + w[2]*cp3[0] + w[3]*cp4[0]);
|
|
cp[1]= (int)(w[0]*cp1[1] + w[1]*cp2[1] + w[2]*cp3[1] + w[3]*cp4[1]);
|
|
cp[2]= (int)(w[0]*cp1[2] + w[1]*cp2[2] + w[2]*cp3[2] + w[3]*cp4[2]);
|
|
cp[3]= (int)(w[0]*cp1[3] + w[1]*cp2[3] + w[2]*cp3[3] + w[3]*cp4[3]);
|
|
}
|
|
else {
|
|
cp[0]= (int)(w[0]*cp1[0] + w[1]*cp2[0] + w[2]*cp3[0]);
|
|
cp[1]= (int)(w[0]*cp1[1] + w[1]*cp2[1] + w[2]*cp3[1]);
|
|
cp[2]= (int)(w[0]*cp1[2] + w[1]*cp2[2] + w[2]*cp3[2]);
|
|
cp[3]= (int)(w[0]*cp1[3] + w[1]*cp2[3] + w[2]*cp3[3]);
|
|
}
|
|
}
|
|
|
|
static float psys_interpolate_value_from_verts(DerivedMesh *dm, short from, int index, float *fw, float *values)
|
|
{
|
|
if(values==0 || index==-1)
|
|
return 0.0;
|
|
|
|
switch(from){
|
|
case PART_FROM_VERT:
|
|
return values[index];
|
|
case PART_FROM_FACE:
|
|
case PART_FROM_VOLUME:
|
|
{
|
|
MFace *mf=dm->getFaceData(dm,index,CD_MFACE);
|
|
return interpolate_particle_value(values[mf->v1],values[mf->v2],values[mf->v3],values[mf->v4],fw,mf->v4);
|
|
}
|
|
|
|
}
|
|
return 0.0;
|
|
}
|
|
|
|
/* conversion of pa->fw to origspace layer coordinates */
|
|
static void psys_w_to_origspace(float *w, float *uv)
|
|
{
|
|
uv[0]= w[1] + w[2];
|
|
uv[1]= w[2] + w[3];
|
|
}
|
|
|
|
/* conversion of pa->fw to weights in face from origspace */
|
|
static void psys_origspace_to_w(OrigSpaceFace *osface, int quad, float *w, float *neww)
|
|
{
|
|
float v[4][3], co[3];
|
|
|
|
v[0][0]= osface->uv[0][0]; v[0][1]= osface->uv[0][1]; v[0][2]= 0.0f;
|
|
v[1][0]= osface->uv[1][0]; v[1][1]= osface->uv[1][1]; v[1][2]= 0.0f;
|
|
v[2][0]= osface->uv[2][0]; v[2][1]= osface->uv[2][1]; v[2][2]= 0.0f;
|
|
|
|
psys_w_to_origspace(w, co);
|
|
co[2]= 0.0f;
|
|
|
|
if(quad) {
|
|
v[3][0]= osface->uv[3][0]; v[3][1]= osface->uv[3][1]; v[3][2]= 0.0f;
|
|
interp_weights_poly_v3( neww,v, 4, co);
|
|
}
|
|
else {
|
|
interp_weights_poly_v3( neww,v, 3, co);
|
|
neww[3]= 0.0f;
|
|
}
|
|
}
|
|
|
|
/* find the derived mesh face for a particle, set the mf passed. this is slow
|
|
* and can be optimized but only for many lookups. returns the face index. */
|
|
int psys_particle_dm_face_lookup(Object *ob, DerivedMesh *dm, int index, float *fw, struct LinkNode *node)
|
|
{
|
|
Mesh *me= (Mesh*)ob->data;
|
|
MFace *mface;
|
|
OrigSpaceFace *osface;
|
|
int *origindex;
|
|
int quad, findex, totface;
|
|
float uv[2], (*faceuv)[2];
|
|
|
|
mface = dm->getFaceDataArray(dm, CD_MFACE);
|
|
origindex = dm->getFaceDataArray(dm, CD_ORIGINDEX);
|
|
osface = dm->getFaceDataArray(dm, CD_ORIGSPACE);
|
|
|
|
totface = dm->getNumFaces(dm);
|
|
|
|
if(osface==NULL || origindex==NULL) {
|
|
/* Assume we dont need osface data */
|
|
if (index <totface) {
|
|
//printf("\tNO CD_ORIGSPACE, assuming not needed\n");
|
|
return index;
|
|
} else {
|
|
printf("\tNO CD_ORIGSPACE, error out of range\n");
|
|
return DMCACHE_NOTFOUND;
|
|
}
|
|
}
|
|
else if(index >= me->totface)
|
|
return DMCACHE_NOTFOUND; /* index not in the original mesh */
|
|
|
|
psys_w_to_origspace(fw, uv);
|
|
|
|
if(node) { /* we have a linked list of faces that we use, faster! */
|
|
for(;node; node=node->next) {
|
|
findex= GET_INT_FROM_POINTER(node->link);
|
|
faceuv= osface[findex].uv;
|
|
quad= mface[findex].v4;
|
|
|
|
/* check that this intersects - Its possible this misses :/ -
|
|
* could also check its not between */
|
|
if(quad) {
|
|
if(isect_point_quad_v2(uv, faceuv[0], faceuv[1], faceuv[2], faceuv[3]))
|
|
return findex;
|
|
}
|
|
else if(isect_point_tri_v2(uv, faceuv[0], faceuv[1], faceuv[2]))
|
|
return findex;
|
|
}
|
|
}
|
|
else { /* if we have no node, try every face */
|
|
for(findex=0; findex<totface; findex++) {
|
|
if(origindex[findex] == index) {
|
|
faceuv= osface[findex].uv;
|
|
quad= mface[findex].v4;
|
|
|
|
/* check that this intersects - Its possible this misses :/ -
|
|
* could also check its not between */
|
|
if(quad) {
|
|
if(isect_point_quad_v2(uv, faceuv[0], faceuv[1], faceuv[2], faceuv[3]))
|
|
return findex;
|
|
}
|
|
else if(isect_point_tri_v2(uv, faceuv[0], faceuv[1], faceuv[2]))
|
|
return findex;
|
|
}
|
|
}
|
|
}
|
|
|
|
return DMCACHE_NOTFOUND;
|
|
}
|
|
|
|
static int psys_map_index_on_dm(DerivedMesh *dm, int from, int index, int index_dmcache, float *fw, float UNUSED(foffset), int *mapindex, float *mapfw)
|
|
{
|
|
if(index < 0)
|
|
return 0;
|
|
|
|
if (dm->deformedOnly || index_dmcache == DMCACHE_ISCHILD) {
|
|
/* for meshes that are either only defined or for child particles, the
|
|
* index and fw do not require any mapping, so we can directly use it */
|
|
if(from == PART_FROM_VERT) {
|
|
if(index >= dm->getNumVerts(dm))
|
|
return 0;
|
|
|
|
*mapindex = index;
|
|
}
|
|
else { /* FROM_FACE/FROM_VOLUME */
|
|
if(index >= dm->getNumFaces(dm))
|
|
return 0;
|
|
|
|
*mapindex = index;
|
|
QUATCOPY(mapfw, fw);
|
|
}
|
|
} else {
|
|
/* for other meshes that have been modified, we try to map the particle
|
|
* to their new location, which means a different index, and for faces
|
|
* also a new face interpolation weights */
|
|
if(from == PART_FROM_VERT) {
|
|
if (index_dmcache == DMCACHE_NOTFOUND || index_dmcache > dm->getNumVerts(dm))
|
|
return 0;
|
|
|
|
*mapindex = index_dmcache;
|
|
}
|
|
else { /* FROM_FACE/FROM_VOLUME */
|
|
/* find a face on the derived mesh that uses this face */
|
|
MFace *mface;
|
|
OrigSpaceFace *osface;
|
|
int i;
|
|
|
|
i = index_dmcache;
|
|
|
|
if(i== DMCACHE_NOTFOUND || i >= dm->getNumFaces(dm))
|
|
return 0;
|
|
|
|
*mapindex = i;
|
|
|
|
/* modify the original weights to become
|
|
* weights for the derived mesh face */
|
|
osface= dm->getFaceDataArray(dm, CD_ORIGSPACE);
|
|
mface= dm->getFaceData(dm, i, CD_MFACE);
|
|
|
|
if(osface == NULL)
|
|
mapfw[0]= mapfw[1]= mapfw[2]= mapfw[3]= 0.0f;
|
|
else
|
|
psys_origspace_to_w(&osface[i], mface->v4, fw, mapfw);
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* interprets particle data to get a point on a mesh in object space */
|
|
void psys_particle_on_dm(DerivedMesh *dm, int from, int index, int index_dmcache, float *fw, float foffset, float *vec, float *nor, float *utan, float *vtan, float *orco, float *ornor)
|
|
{
|
|
float tmpnor[3], mapfw[4];
|
|
float (*orcodata)[3];
|
|
int mapindex;
|
|
|
|
if(!psys_map_index_on_dm(dm, from, index, index_dmcache, fw, foffset, &mapindex, mapfw)) {
|
|
if(vec) { vec[0]=vec[1]=vec[2]=0.0; }
|
|
if(nor) { nor[0]=nor[1]=0.0; nor[2]=1.0; }
|
|
if(orco) { orco[0]=orco[1]=orco[2]=0.0; }
|
|
if(ornor) { ornor[0]=ornor[1]=0.0; ornor[2]=1.0; }
|
|
if(utan) { utan[0]=utan[1]=utan[2]=0.0; }
|
|
if(vtan) { vtan[0]=vtan[1]=vtan[2]=0.0; }
|
|
|
|
return;
|
|
}
|
|
|
|
orcodata= dm->getVertDataArray(dm, CD_ORCO);
|
|
|
|
if(from == PART_FROM_VERT) {
|
|
dm->getVertCo(dm,mapindex,vec);
|
|
|
|
if(nor) {
|
|
dm->getVertNo(dm,mapindex,nor);
|
|
normalize_v3(nor);
|
|
}
|
|
|
|
if(orco)
|
|
VECCOPY(orco, orcodata[mapindex])
|
|
|
|
if(ornor) {
|
|
dm->getVertNo(dm,mapindex,nor);
|
|
normalize_v3(nor);
|
|
}
|
|
|
|
if(utan && vtan) {
|
|
utan[0]= utan[1]= utan[2]= 0.0f;
|
|
vtan[0]= vtan[1]= vtan[2]= 0.0f;
|
|
}
|
|
}
|
|
else { /* PART_FROM_FACE / PART_FROM_VOLUME */
|
|
MFace *mface;
|
|
MTFace *mtface;
|
|
MVert *mvert;
|
|
|
|
mface=dm->getFaceData(dm,mapindex,CD_MFACE);
|
|
mvert=dm->getVertDataArray(dm,CD_MVERT);
|
|
mtface=CustomData_get_layer(&dm->faceData,CD_MTFACE);
|
|
|
|
if(mtface)
|
|
mtface += mapindex;
|
|
|
|
if(from==PART_FROM_VOLUME) {
|
|
psys_interpolate_face(mvert,mface,mtface,orcodata,mapfw,vec,tmpnor,utan,vtan,orco,ornor);
|
|
if(nor)
|
|
VECCOPY(nor,tmpnor);
|
|
|
|
normalize_v3(tmpnor);
|
|
mul_v3_fl(tmpnor,-foffset);
|
|
VECADD(vec,vec,tmpnor);
|
|
}
|
|
else
|
|
psys_interpolate_face(mvert,mface,mtface,orcodata,mapfw,vec,nor,utan,vtan,orco,ornor);
|
|
}
|
|
}
|
|
|
|
float psys_particle_value_from_verts(DerivedMesh *dm, short from, ParticleData *pa, float *values)
|
|
{
|
|
float mapfw[4];
|
|
int mapindex;
|
|
|
|
if(!psys_map_index_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, &mapindex, mapfw))
|
|
return 0.0f;
|
|
|
|
return psys_interpolate_value_from_verts(dm, from, mapindex, mapfw, values);
|
|
}
|
|
|
|
ParticleSystemModifierData *psys_get_modifier(Object *ob, ParticleSystem *psys)
|
|
{
|
|
ModifierData *md;
|
|
ParticleSystemModifierData *psmd;
|
|
|
|
for(md=ob->modifiers.first; md; md=md->next){
|
|
if(md->type==eModifierType_ParticleSystem){
|
|
psmd= (ParticleSystemModifierData*) md;
|
|
if(psmd->psys==psys){
|
|
return psmd;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
/************************************************/
|
|
/* Particles on a shape */
|
|
/************************************************/
|
|
/* ready for future use */
|
|
static void psys_particle_on_shape(int UNUSED(distr), int UNUSED(index), float *UNUSED(fuv), float *vec, float *nor, float *utan, float *vtan, float *orco, float *ornor)
|
|
{
|
|
/* TODO */
|
|
float zerovec[3]={0.0f,0.0f,0.0f};
|
|
if(vec){
|
|
VECCOPY(vec,zerovec);
|
|
}
|
|
if(nor){
|
|
VECCOPY(nor,zerovec);
|
|
}
|
|
if(utan){
|
|
VECCOPY(utan,zerovec);
|
|
}
|
|
if(vtan){
|
|
VECCOPY(vtan,zerovec);
|
|
}
|
|
if(orco){
|
|
VECCOPY(orco,zerovec);
|
|
}
|
|
if(ornor){
|
|
VECCOPY(ornor,zerovec);
|
|
}
|
|
}
|
|
/************************************************/
|
|
/* Particles on emitter */
|
|
/************************************************/
|
|
void psys_particle_on_emitter(ParticleSystemModifierData *psmd, int from, int index, int index_dmcache, float *fuv, float foffset, float *vec, float *nor, float *utan, float *vtan, float *orco, float *ornor){
|
|
if(psmd){
|
|
if(psmd->psys->part->distr==PART_DISTR_GRID && psmd->psys->part->from != PART_FROM_VERT){
|
|
if(vec)
|
|
copy_v3_v3(vec,fuv);
|
|
|
|
if(orco)
|
|
copy_v3_v3(orco, fuv);
|
|
return;
|
|
}
|
|
/* we cant use the num_dmcache */
|
|
psys_particle_on_dm(psmd->dm,from,index,index_dmcache,fuv,foffset,vec,nor,utan,vtan,orco,ornor);
|
|
}
|
|
else
|
|
psys_particle_on_shape(from,index,fuv,vec,nor,utan,vtan,orco,ornor);
|
|
|
|
}
|
|
/************************************************/
|
|
/* Path Cache */
|
|
/************************************************/
|
|
static float vert_weight(MDeformVert *dvert, int group)
|
|
{
|
|
MDeformWeight *dw;
|
|
int i;
|
|
|
|
if(dvert) {
|
|
dw= dvert->dw;
|
|
for(i= dvert->totweight; i>0; i--, dw++) {
|
|
if(dw->def_nr == group) return dw->weight;
|
|
if(i==1) break; /*otherwise dw will point to somewhere it shouldn't*/
|
|
}
|
|
}
|
|
return 0.0;
|
|
}
|
|
|
|
static void do_kink(ParticleKey *state, ParticleKey *par, float *par_rot, float time, float freq, float shape, float amplitude, float flat, short type, short axis, float obmat[][4], int smooth_start)
|
|
{
|
|
float kink[3]={1.f,0.f,0.f}, par_vec[3], q1[4]={1.f,0.f,0.f,0.f};
|
|
float t, dt=1.f, result[3];
|
|
|
|
if(par == NULL || type == PART_KINK_NO)
|
|
return;
|
|
|
|
CLAMP(time, 0.f, 1.f);
|
|
|
|
if(shape!=0.0f && type!=PART_KINK_BRAID) {
|
|
if(shape<0.0f)
|
|
time= (float)pow(time, 1.f+shape);
|
|
else
|
|
time= (float)pow(time, 1.f/(1.f-shape));
|
|
}
|
|
|
|
t = time * freq *(float)M_PI;
|
|
|
|
if(smooth_start) {
|
|
dt = fabs(t);
|
|
/* smooth the beginning of kink */
|
|
CLAMP(dt, 0.f, (float)M_PI);
|
|
dt = sin(dt/2.f);
|
|
}
|
|
|
|
if(type != PART_KINK_RADIAL) {
|
|
float temp[3];
|
|
|
|
kink[axis]=1.f;
|
|
|
|
if(obmat)
|
|
mul_mat3_m4_v3(obmat, kink);
|
|
|
|
if(par_rot)
|
|
mul_qt_v3(par_rot, kink);
|
|
|
|
/* make sure kink is normal to strand */
|
|
project_v3_v3v3(temp, kink, par->vel);
|
|
sub_v3_v3(kink, temp);
|
|
normalize_v3(kink);
|
|
}
|
|
|
|
copy_v3_v3(result, state->co);
|
|
sub_v3_v3v3(par_vec, par->co, state->co);
|
|
|
|
switch(type) {
|
|
case PART_KINK_CURL:
|
|
{
|
|
mul_v3_fl(par_vec, -1.f);
|
|
|
|
if(flat > 0.f) {
|
|
float proj[3];
|
|
project_v3_v3v3(proj, par_vec, par->vel);
|
|
madd_v3_v3fl(par_vec, proj, -flat);
|
|
|
|
project_v3_v3v3(proj, par_vec, kink);
|
|
madd_v3_v3fl(par_vec, proj, -flat);
|
|
}
|
|
|
|
axis_angle_to_quat(q1, kink, (float)M_PI/2.f);
|
|
|
|
mul_qt_v3(q1, par_vec);
|
|
|
|
madd_v3_v3fl(par_vec, kink, amplitude);
|
|
|
|
/* rotate kink vector around strand tangent */
|
|
if(t!=0.f) {
|
|
axis_angle_to_quat(q1, par->vel, t);
|
|
mul_qt_v3(q1, par_vec);
|
|
}
|
|
|
|
add_v3_v3v3(result, par->co, par_vec);
|
|
break;
|
|
}
|
|
case PART_KINK_RADIAL:
|
|
{
|
|
if(flat > 0.f) {
|
|
float proj[3];
|
|
/* flatten along strand */
|
|
project_v3_v3v3(proj, par_vec, par->vel);
|
|
madd_v3_v3fl(result, proj, flat);
|
|
}
|
|
|
|
madd_v3_v3fl(result, par_vec, -amplitude*(float)sin(t));
|
|
break;
|
|
}
|
|
case PART_KINK_WAVE:
|
|
{
|
|
madd_v3_v3fl(result, kink, amplitude*(float)sin(t));
|
|
|
|
if(flat > 0.f) {
|
|
float proj[3];
|
|
/* flatten along wave */
|
|
project_v3_v3v3(proj, par_vec, kink);
|
|
madd_v3_v3fl(result, proj, flat);
|
|
|
|
/* flatten along strand */
|
|
project_v3_v3v3(proj, par_vec, par->vel);
|
|
madd_v3_v3fl(result, proj, flat);
|
|
}
|
|
break;
|
|
}
|
|
case PART_KINK_BRAID:
|
|
{
|
|
float y_vec[3]={0.f,1.f,0.f};
|
|
float z_vec[3]={0.f,0.f,1.f};
|
|
float vec_one[3], state_co[3];
|
|
float inp_y, inp_z, length;
|
|
|
|
if(par_rot) {
|
|
mul_qt_v3(par_rot, y_vec);
|
|
mul_qt_v3(par_rot, z_vec);
|
|
}
|
|
|
|
mul_v3_fl(par_vec, -1.f);
|
|
normalize_v3_v3(vec_one, par_vec);
|
|
|
|
inp_y=dot_v3v3(y_vec, vec_one);
|
|
inp_z=dot_v3v3(z_vec, vec_one);
|
|
|
|
if(inp_y > 0.5f){
|
|
copy_v3_v3(state_co, y_vec);
|
|
|
|
mul_v3_fl(y_vec, amplitude*(float)cos(t));
|
|
mul_v3_fl(z_vec, amplitude/2.f*(float)sin(2.f*t));
|
|
}
|
|
else if(inp_z > 0.0f){
|
|
mul_v3_v3fl(state_co, z_vec, (float)sin((float)M_PI/3.f));
|
|
VECADDFAC(state_co,state_co,y_vec,-0.5f);
|
|
|
|
mul_v3_fl(y_vec, -amplitude * (float)cos(t + (float)M_PI/3.f));
|
|
mul_v3_fl(z_vec, amplitude/2.f * (float)cos(2.f*t + (float)M_PI/6.f));
|
|
}
|
|
else{
|
|
mul_v3_v3fl(state_co, z_vec, -(float)sin((float)M_PI/3.f));
|
|
madd_v3_v3fl(state_co, y_vec, -0.5f);
|
|
|
|
mul_v3_fl(y_vec, amplitude * (float)-sin(t + (float)M_PI/6.f));
|
|
mul_v3_fl(z_vec, amplitude/2.f * (float)-sin(2.f*t + (float)M_PI/3.f));
|
|
}
|
|
|
|
mul_v3_fl(state_co, amplitude);
|
|
add_v3_v3(state_co, par->co);
|
|
sub_v3_v3v3(par_vec, state->co, state_co);
|
|
|
|
length = normalize_v3(par_vec);
|
|
mul_v3_fl(par_vec, MIN2(length, amplitude/2.f));
|
|
|
|
add_v3_v3v3(state_co, par->co, y_vec);
|
|
add_v3_v3(state_co, z_vec);
|
|
add_v3_v3(state_co, par_vec);
|
|
|
|
shape = 2.f*(float)M_PI * (1.f+shape);
|
|
|
|
if(t<shape){
|
|
shape = t/shape;
|
|
shape = (float)sqrt((double)shape);
|
|
interp_v3_v3v3(result, result, state_co, shape);
|
|
}
|
|
else{
|
|
copy_v3_v3(result, state_co);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* blend the start of the kink */
|
|
if(dt < 1.f)
|
|
interp_v3_v3v3(state->co, state->co, result, dt);
|
|
else
|
|
copy_v3_v3(state->co, result);
|
|
}
|
|
|
|
static float do_clump(ParticleKey *state, ParticleKey *par, float time, float clumpfac, float clumppow, float pa_clump)
|
|
{
|
|
float clump = 0.f;
|
|
|
|
if(par && clumpfac!=0.0f){
|
|
float cpow;
|
|
|
|
if(clumppow < 0.0f)
|
|
cpow=1.0f+clumppow;
|
|
else
|
|
cpow=1.0f+9.0f*clumppow;
|
|
|
|
if(clumpfac < 0.0f) /* clump roots instead of tips */
|
|
clump = -clumpfac*pa_clump*(float)pow(1.0-(double)time,(double)cpow);
|
|
else
|
|
clump = clumpfac*pa_clump*(float)pow((double)time,(double)cpow);
|
|
|
|
interp_v3_v3v3(state->co,state->co,par->co,clump);
|
|
}
|
|
|
|
return clump;
|
|
}
|
|
void precalc_guides(ParticleSimulationData *sim, ListBase *effectors)
|
|
{
|
|
EffectedPoint point;
|
|
ParticleKey state;
|
|
EffectorData efd;
|
|
EffectorCache *eff;
|
|
ParticleSystem *psys = sim->psys;
|
|
EffectorWeights *weights = sim->psys->part->effector_weights;
|
|
GuideEffectorData *data;
|
|
PARTICLE_P;
|
|
|
|
if(!effectors)
|
|
return;
|
|
|
|
LOOP_PARTICLES {
|
|
psys_particle_on_emitter(sim->psmd,sim->psys->part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,state.co,0,0,0,0,0);
|
|
|
|
mul_m4_v3(sim->ob->obmat, state.co);
|
|
mul_mat3_m4_v3(sim->ob->obmat, state.vel);
|
|
|
|
pd_point_from_particle(sim, pa, &state, &point);
|
|
|
|
for(eff = effectors->first; eff; eff=eff->next) {
|
|
if(eff->pd->forcefield != PFIELD_GUIDE)
|
|
continue;
|
|
|
|
if(!eff->guide_data)
|
|
eff->guide_data = MEM_callocN(sizeof(GuideEffectorData)*psys->totpart, "GuideEffectorData");
|
|
|
|
data = eff->guide_data + p;
|
|
|
|
VECSUB(efd.vec_to_point, state.co, eff->guide_loc);
|
|
VECCOPY(efd.nor, eff->guide_dir);
|
|
efd.distance = len_v3(efd.vec_to_point);
|
|
|
|
VECCOPY(data->vec_to_point, efd.vec_to_point);
|
|
data->strength = effector_falloff(eff, &efd, &point, weights);
|
|
}
|
|
}
|
|
}
|
|
int do_guides(ListBase *effectors, ParticleKey *state, int index, float time)
|
|
{
|
|
EffectorCache *eff;
|
|
PartDeflect *pd;
|
|
Curve *cu;
|
|
ParticleKey key, par;
|
|
GuideEffectorData *data;
|
|
|
|
float effect[3] = {0.0f, 0.0f, 0.0f}, veffect[3] = {0.0f, 0.0f, 0.0f};
|
|
float guidevec[4], guidedir[3], rot2[4], temp[3];
|
|
float guidetime, radius, weight, angle, totstrength = 0.0f;
|
|
float vec_to_point[3];
|
|
|
|
if(effectors) for(eff = effectors->first; eff; eff=eff->next) {
|
|
pd = eff->pd;
|
|
|
|
if(pd->forcefield != PFIELD_GUIDE)
|
|
continue;
|
|
|
|
data = eff->guide_data + index;
|
|
|
|
if(data->strength <= 0.0f)
|
|
continue;
|
|
|
|
guidetime = time / (1.0f - pd->free_end);
|
|
|
|
if(guidetime>1.0f)
|
|
continue;
|
|
|
|
cu = (Curve*)eff->ob->data;
|
|
|
|
if(pd->flag & PFIELD_GUIDE_PATH_ADD) {
|
|
if(where_on_path(eff->ob, data->strength * guidetime, guidevec, guidedir, NULL, &radius, &weight)==0)
|
|
return 0;
|
|
}
|
|
else {
|
|
if(where_on_path(eff->ob, guidetime, guidevec, guidedir, NULL, &radius, &weight)==0)
|
|
return 0;
|
|
}
|
|
|
|
mul_m4_v3(eff->ob->obmat, guidevec);
|
|
mul_mat3_m4_v3(eff->ob->obmat, guidedir);
|
|
|
|
normalize_v3(guidedir);
|
|
|
|
VECCOPY(vec_to_point, data->vec_to_point);
|
|
|
|
if(guidetime != 0.0f) {
|
|
/* curve direction */
|
|
cross_v3_v3v3(temp, eff->guide_dir, guidedir);
|
|
angle = dot_v3v3(eff->guide_dir, guidedir)/(len_v3(eff->guide_dir));
|
|
angle = saacos(angle);
|
|
axis_angle_to_quat( rot2,temp, angle);
|
|
mul_qt_v3(rot2, vec_to_point);
|
|
|
|
/* curve tilt */
|
|
axis_angle_to_quat( rot2,guidedir, guidevec[3] - eff->guide_loc[3]);
|
|
mul_qt_v3(rot2, vec_to_point);
|
|
}
|
|
|
|
/* curve taper */
|
|
if(cu->taperobj)
|
|
mul_v3_fl(vec_to_point, calc_taper(eff->scene, cu->taperobj, (int)(data->strength*guidetime*100.0f), 100));
|
|
|
|
else{ /* curve size*/
|
|
if(cu->flag & CU_PATH_RADIUS) {
|
|
mul_v3_fl(vec_to_point, radius);
|
|
}
|
|
}
|
|
par.co[0] = par.co[1] = par.co[2] = 0.0f;
|
|
VECCOPY(key.co, vec_to_point);
|
|
do_kink(&key, &par, 0, guidetime, pd->kink_freq, pd->kink_shape, pd->kink_amp, 0.f, pd->kink, pd->kink_axis, 0, 0);
|
|
do_clump(&key, &par, guidetime, pd->clump_fac, pd->clump_pow, 1.0f);
|
|
VECCOPY(vec_to_point, key.co);
|
|
|
|
VECADD(vec_to_point, vec_to_point, guidevec);
|
|
|
|
//VECSUB(pa_loc,pa_loc,pa_zero);
|
|
VECADDFAC(effect, effect, vec_to_point, data->strength);
|
|
VECADDFAC(veffect, veffect, guidedir, data->strength);
|
|
totstrength += data->strength;
|
|
|
|
if(pd->flag & PFIELD_GUIDE_PATH_WEIGHT)
|
|
totstrength *= weight;
|
|
}
|
|
|
|
if(totstrength != 0.0f){
|
|
if(totstrength > 1.0f)
|
|
mul_v3_fl(effect, 1.0f / totstrength);
|
|
CLAMP(totstrength, 0.0f, 1.0f);
|
|
//VECADD(effect,effect,pa_zero);
|
|
interp_v3_v3v3(state->co, state->co, effect, totstrength);
|
|
|
|
normalize_v3(veffect);
|
|
mul_v3_fl(veffect, len_v3(state->vel));
|
|
VECCOPY(state->vel, veffect);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
static void do_rough(float *loc, float mat[4][4], float t, float fac, float size, float thres, ParticleKey *state)
|
|
{
|
|
float rough[3];
|
|
float rco[3];
|
|
|
|
if(thres != 0.0f)
|
|
if((float)fabs((float)(-1.5f+loc[0]+loc[1]+loc[2]))<1.5f*thres) return;
|
|
|
|
VECCOPY(rco,loc);
|
|
mul_v3_fl(rco,t);
|
|
rough[0]=-1.0f+2.0f*BLI_gTurbulence(size, rco[0], rco[1], rco[2], 2,0,2);
|
|
rough[1]=-1.0f+2.0f*BLI_gTurbulence(size, rco[1], rco[2], rco[0], 2,0,2);
|
|
rough[2]=-1.0f+2.0f*BLI_gTurbulence(size, rco[2], rco[0], rco[1], 2,0,2);
|
|
|
|
VECADDFAC(state->co,state->co,mat[0],fac*rough[0]);
|
|
VECADDFAC(state->co,state->co,mat[1],fac*rough[1]);
|
|
VECADDFAC(state->co,state->co,mat[2],fac*rough[2]);
|
|
}
|
|
static void do_rough_end(float *loc, float mat[4][4], float t, float fac, float shape, ParticleKey *state)
|
|
{
|
|
float rough[2];
|
|
float roughfac;
|
|
|
|
roughfac=fac*(float)pow((double)t,shape);
|
|
copy_v2_v2(rough,loc);
|
|
rough[0]=-1.0f+2.0f*rough[0];
|
|
rough[1]=-1.0f+2.0f*rough[1];
|
|
mul_v2_fl(rough,roughfac);
|
|
|
|
VECADDFAC(state->co,state->co,mat[0],rough[0]);
|
|
VECADDFAC(state->co,state->co,mat[1],rough[1]);
|
|
}
|
|
static void do_path_effectors(ParticleSimulationData *sim, int i, ParticleCacheKey *ca, int k, int steps, float *UNUSED(rootco), float effector, float UNUSED(dfra), float UNUSED(cfra), float *length, float *vec)
|
|
{
|
|
float force[3] = {0.0f,0.0f,0.0f};
|
|
ParticleKey eff_key;
|
|
EffectedPoint epoint;
|
|
|
|
/* Don't apply effectors for dynamic hair, otherwise the effectors don't get applied twice. */
|
|
if(sim->psys->flag & PSYS_HAIR_DYNAMICS)
|
|
return;
|
|
|
|
VECCOPY(eff_key.co,(ca-1)->co);
|
|
VECCOPY(eff_key.vel,(ca-1)->vel);
|
|
QUATCOPY(eff_key.rot,(ca-1)->rot);
|
|
|
|
pd_point_from_particle(sim, sim->psys->particles+i, &eff_key, &epoint);
|
|
pdDoEffectors(sim->psys->effectors, sim->colliders, sim->psys->part->effector_weights, &epoint, force, NULL);
|
|
|
|
mul_v3_fl(force, effector*powf((float)k / (float)steps, 100.0f * sim->psys->part->eff_hair) / (float)steps);
|
|
|
|
add_v3_v3(force, vec);
|
|
|
|
normalize_v3(force);
|
|
|
|
if(k < steps)
|
|
sub_v3_v3v3(vec, (ca+1)->co, ca->co);
|
|
|
|
madd_v3_v3v3fl(ca->co, (ca-1)->co, force, *length);
|
|
|
|
if(k < steps)
|
|
*length = len_v3(vec);
|
|
}
|
|
static int check_path_length(int k, ParticleCacheKey *keys, ParticleCacheKey *state, float max_length, float *cur_length, float length, float *dvec)
|
|
{
|
|
if(*cur_length + length > max_length){
|
|
mul_v3_fl(dvec, (max_length - *cur_length) / length);
|
|
VECADD(state->co, (state - 1)->co, dvec);
|
|
keys->steps = k;
|
|
/* something over the maximum step value */
|
|
return k=100000;
|
|
}
|
|
else {
|
|
*cur_length+=length;
|
|
return k;
|
|
}
|
|
}
|
|
static void offset_child(ChildParticle *cpa, ParticleKey *par, float *par_rot, ParticleKey *child, float flat, float radius)
|
|
{
|
|
copy_v3_v3(child->co, cpa->fuv);
|
|
mul_v3_fl(child->co, radius);
|
|
|
|
child->co[0]*=flat;
|
|
|
|
copy_v3_v3(child->vel, par->vel);
|
|
|
|
if(par_rot) {
|
|
mul_qt_v3(par_rot, child->co);
|
|
copy_qt_qt(child->rot, par_rot);
|
|
}
|
|
else
|
|
unit_qt(child->rot);
|
|
|
|
add_v3_v3(child->co, par->co);
|
|
}
|
|
float *psys_cache_vgroup(DerivedMesh *dm, ParticleSystem *psys, int vgroup)
|
|
{
|
|
float *vg=0;
|
|
|
|
if(vgroup < 0) {
|
|
/* hair dynamics pinning vgroup */
|
|
|
|
}
|
|
else if(psys->vgroup[vgroup]){
|
|
MDeformVert *dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);
|
|
if(dvert){
|
|
int totvert=dm->getNumVerts(dm), i;
|
|
vg=MEM_callocN(sizeof(float)*totvert, "vg_cache");
|
|
if(psys->vg_neg&(1<<vgroup)){
|
|
for(i=0; i<totvert; i++)
|
|
vg[i]=1.0f-vert_weight(dvert+i,psys->vgroup[vgroup]-1);
|
|
}
|
|
else{
|
|
for(i=0; i<totvert; i++)
|
|
vg[i]=vert_weight(dvert+i,psys->vgroup[vgroup]-1);
|
|
}
|
|
}
|
|
}
|
|
return vg;
|
|
}
|
|
void psys_find_parents(ParticleSimulationData *sim)
|
|
{
|
|
ParticleSettings *part=sim->psys->part;
|
|
KDTree *tree;
|
|
ChildParticle *cpa;
|
|
int p, totparent,totchild=sim->psys->totchild;
|
|
float co[3], orco[3];
|
|
int from=PART_FROM_FACE;
|
|
totparent=(int)(totchild*part->parents*0.3f);
|
|
|
|
if(G.rendering && part->child_nbr && part->ren_child_nbr)
|
|
totparent*=(float)part->child_nbr/(float)part->ren_child_nbr;
|
|
|
|
tree=BLI_kdtree_new(totparent);
|
|
|
|
for(p=0,cpa=sim->psys->child; p<totparent; p++,cpa++){
|
|
psys_particle_on_emitter(sim->psmd,from,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,co,0,0,0,orco,0);
|
|
BLI_kdtree_insert(tree, p, orco, NULL);
|
|
}
|
|
|
|
BLI_kdtree_balance(tree);
|
|
|
|
for(; p<totchild; p++,cpa++){
|
|
psys_particle_on_emitter(sim->psmd,from,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,co,0,0,0,orco,0);
|
|
cpa->parent=BLI_kdtree_find_nearest(tree, orco, NULL, NULL);
|
|
}
|
|
|
|
BLI_kdtree_free(tree);
|
|
}
|
|
|
|
static void get_strand_normal(Material *ma, float *surfnor, float surfdist, float *nor)
|
|
{
|
|
float cross[3], nstrand[3], vnor[3], blend;
|
|
|
|
if(!((ma->mode & MA_STR_SURFDIFF) || (ma->strand_surfnor > 0.0f)))
|
|
return;
|
|
|
|
if(ma->mode & MA_STR_SURFDIFF) {
|
|
cross_v3_v3v3(cross, surfnor, nor);
|
|
cross_v3_v3v3(nstrand, nor, cross);
|
|
|
|
blend= INPR(nstrand, surfnor);
|
|
CLAMP(blend, 0.0f, 1.0f);
|
|
|
|
interp_v3_v3v3(vnor, nstrand, surfnor, blend);
|
|
normalize_v3(vnor);
|
|
}
|
|
else
|
|
VECCOPY(vnor, nor)
|
|
|
|
if(ma->strand_surfnor > 0.0f) {
|
|
if(ma->strand_surfnor > surfdist) {
|
|
blend= (ma->strand_surfnor - surfdist)/ma->strand_surfnor;
|
|
interp_v3_v3v3(vnor, vnor, surfnor, blend);
|
|
normalize_v3(vnor);
|
|
}
|
|
}
|
|
|
|
VECCOPY(nor, vnor);
|
|
}
|
|
|
|
static int psys_threads_init_path(ParticleThread *threads, Scene *scene, float cfra, int editupdate)
|
|
{
|
|
ParticleThreadContext *ctx= threads[0].ctx;
|
|
/* Object *ob= ctx->sim.ob; */
|
|
ParticleSystem *psys= ctx->sim.psys;
|
|
ParticleSettings *part = psys->part;
|
|
/* ParticleEditSettings *pset = &scene->toolsettings->particle; */
|
|
int totparent=0, between=0;
|
|
int steps = (int)pow(2.0, (double)part->draw_step);
|
|
int totchild = psys->totchild;
|
|
int i, seed, totthread= threads[0].tot;
|
|
|
|
/*---start figuring out what is actually wanted---*/
|
|
if(psys_in_edit_mode(scene, psys)) {
|
|
ParticleEditSettings *pset = &scene->toolsettings->particle;
|
|
|
|
if(psys->renderdata==0 && (psys->edit==NULL || pset->flag & PE_DRAW_PART)==0)
|
|
totchild=0;
|
|
|
|
steps = (int)pow(2.0, (double)pset->draw_step);
|
|
}
|
|
|
|
if(totchild && part->childtype==PART_CHILD_FACES){
|
|
totparent=(int)(totchild*part->parents*0.3f);
|
|
|
|
if(G.rendering && part->child_nbr && part->ren_child_nbr)
|
|
totparent*=(float)part->child_nbr/(float)part->ren_child_nbr;
|
|
|
|
/* part->parents could still be 0 so we can't test with totparent */
|
|
between=1;
|
|
}
|
|
|
|
if(psys->renderdata)
|
|
steps=(int)pow(2.0,(double)part->ren_step);
|
|
else{
|
|
totchild=(int)((float)totchild*(float)part->disp/100.0f);
|
|
totparent=MIN2(totparent,totchild);
|
|
}
|
|
|
|
if(totchild==0) return 0;
|
|
|
|
/* init random number generator */
|
|
seed= 31415926 + ctx->sim.psys->seed;
|
|
|
|
if(ctx->editupdate || totchild < 10000)
|
|
totthread= 1;
|
|
|
|
for(i=0; i<totthread; i++) {
|
|
threads[i].rng_path= rng_new(seed);
|
|
threads[i].tot= totthread;
|
|
}
|
|
|
|
/* fill context values */
|
|
ctx->between= between;
|
|
ctx->steps= steps;
|
|
ctx->totchild= totchild;
|
|
ctx->totparent= totparent;
|
|
ctx->parent_pass= 0;
|
|
ctx->cfra= cfra;
|
|
ctx->editupdate= editupdate;
|
|
|
|
psys->lattice = psys_get_lattice(&ctx->sim);
|
|
|
|
/* cache all relevant vertex groups if they exist */
|
|
ctx->vg_length = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_LENGTH);
|
|
ctx->vg_clump = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_CLUMP);
|
|
ctx->vg_kink = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_KINK);
|
|
ctx->vg_rough1 = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_ROUGH1);
|
|
ctx->vg_rough2 = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_ROUGH2);
|
|
ctx->vg_roughe = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_ROUGHE);
|
|
if(psys->part->flag & PART_CHILD_EFFECT)
|
|
ctx->vg_effector = psys_cache_vgroup(ctx->dm,psys,PSYS_VG_EFFECTOR);
|
|
|
|
/* set correct ipo timing */
|
|
#if 0 // XXX old animation system
|
|
if(part->flag&PART_ABS_TIME && part->ipo){
|
|
calc_ipo(part->ipo, cfra);
|
|
execute_ipo((ID *)part, part->ipo);
|
|
}
|
|
#endif // XXX old animation system
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* note: this function must be thread safe, except for branching! */
|
|
static void psys_thread_create_path(ParticleThread *thread, struct ChildParticle *cpa, ParticleCacheKey *child_keys, int i)
|
|
{
|
|
ParticleThreadContext *ctx= thread->ctx;
|
|
Object *ob= ctx->sim.ob;
|
|
ParticleSystem *psys = ctx->sim.psys;
|
|
ParticleSettings *part = psys->part;
|
|
ParticleCacheKey **cache= psys->childcache;
|
|
ParticleCacheKey **pcache= psys_in_edit_mode(ctx->sim.scene, psys) ? psys->edit->pathcache : psys->pathcache;
|
|
ParticleCacheKey *child, *par = NULL, *key[4];
|
|
ParticleTexture ptex;
|
|
float *cpa_fuv=0, *par_rot=0, rot[4];
|
|
float orco[3], ornor[3], hairmat[4][4], t, dvec[3], off1[4][3], off2[4][3];
|
|
float length, max_length = 1.0f, cur_length = 0.0f;
|
|
float eff_length, eff_vec[3], weight[4];
|
|
int k, cpa_num;
|
|
short cpa_from;
|
|
|
|
if(!pcache)
|
|
return;
|
|
|
|
if(ctx->between){
|
|
ParticleData *pa = psys->particles + cpa->pa[0];
|
|
int w, needupdate;
|
|
float foffset, wsum=0.f;
|
|
float co[3];
|
|
float p_min = part->parting_min;
|
|
float p_max = part->parting_max;
|
|
/* Virtual parents don't work nicely with parting. */
|
|
float p_fac = part->parents > 0.f ? 0.f : part->parting_fac;
|
|
|
|
if(ctx->editupdate) {
|
|
needupdate= 0;
|
|
w= 0;
|
|
while(w<4 && cpa->pa[w]>=0) {
|
|
if(psys->edit->points[cpa->pa[w]].flag & PEP_EDIT_RECALC) {
|
|
needupdate= 1;
|
|
break;
|
|
}
|
|
w++;
|
|
}
|
|
|
|
if(!needupdate)
|
|
return;
|
|
else
|
|
memset(child_keys, 0, sizeof(*child_keys)*(ctx->steps+1));
|
|
}
|
|
|
|
/* get parent paths */
|
|
for(w=0; w<4; w++) {
|
|
if(cpa->pa[w] >= 0) {
|
|
key[w] = pcache[cpa->pa[w]];
|
|
weight[w] = cpa->w[w];
|
|
}
|
|
else {
|
|
key[w] = pcache[0];
|
|
weight[w] = 0.f;
|
|
}
|
|
}
|
|
|
|
/* modify weights to create parting */
|
|
if(p_fac > 0.f) {
|
|
for(w=0; w<4; w++) {
|
|
if(w && weight[w] > 0.f) {
|
|
float d;
|
|
if(part->flag & PART_CHILD_LONG_HAIR) {
|
|
/* For long hair use tip distance/root distance as parting factor instead of root to tip angle. */
|
|
float d1 = len_v3v3(key[0]->co, key[w]->co);
|
|
float d2 = len_v3v3((key[0]+key[0]->steps-1)->co, (key[w]+key[w]->steps-1)->co);
|
|
|
|
d = d1 > 0.f ? d2/d1 - 1.f : 10000.f;
|
|
}
|
|
else {
|
|
float v1[3], v2[3];
|
|
sub_v3_v3v3(v1, (key[0]+key[0]->steps-1)->co, key[0]->co);
|
|
sub_v3_v3v3(v2, (key[w]+key[w]->steps-1)->co, key[w]->co);
|
|
normalize_v3(v1);
|
|
normalize_v3(v2);
|
|
|
|
d = saacos(dot_v3v3(v1, v2)) * 180.0f/(float)M_PI;
|
|
}
|
|
|
|
if(p_max > p_min)
|
|
d = (d - p_min)/(p_max - p_min);
|
|
else
|
|
d = (d - p_min) <= 0.f ? 0.f : 1.f;
|
|
|
|
CLAMP(d, 0.f, 1.f);
|
|
|
|
if(d > 0.f)
|
|
weight[w] *= (1.f - d);
|
|
}
|
|
wsum += weight[w];
|
|
}
|
|
for(w=0; w<4; w++)
|
|
weight[w] /= wsum;
|
|
|
|
interp_v4_v4v4(weight, cpa->w, weight, p_fac);
|
|
}
|
|
|
|
/* get the original coordinates (orco) for texture usage */
|
|
cpa_num = cpa->num;
|
|
|
|
foffset = cpa->foffset;
|
|
cpa_fuv = cpa->fuv;
|
|
cpa_from = PART_FROM_FACE;
|
|
|
|
psys_particle_on_emitter(ctx->sim.psmd,cpa_from,cpa_num,DMCACHE_ISCHILD,cpa->fuv,foffset,co,ornor,0,0,orco,0);
|
|
|
|
mul_m4_v3(ob->obmat, co);
|
|
|
|
for(w=0; w<4; w++)
|
|
sub_v3_v3v3(off1[w], co, key[w]->co);
|
|
|
|
psys_mat_hair_to_global(ob, ctx->sim.psmd->dm, psys->part->from, pa, hairmat);
|
|
}
|
|
else{
|
|
ParticleData *pa = psys->particles + cpa->parent;
|
|
float co[3];
|
|
if(ctx->editupdate) {
|
|
if(!(psys->edit->points[cpa->parent].flag & PEP_EDIT_RECALC))
|
|
return;
|
|
|
|
memset(child_keys, 0, sizeof(*child_keys)*(ctx->steps+1));
|
|
}
|
|
|
|
/* get the parent path */
|
|
key[0] = pcache[cpa->parent];
|
|
|
|
/* get the original coordinates (orco) for texture usage */
|
|
cpa_from = part->from;
|
|
cpa_num = pa->num;
|
|
cpa_fuv = pa->fuv;
|
|
|
|
psys_particle_on_emitter(ctx->sim.psmd,cpa_from,cpa_num,DMCACHE_ISCHILD,cpa_fuv,pa->foffset,co,ornor,0,0,orco,0);
|
|
|
|
psys_mat_hair_to_global(ob, ctx->sim.psmd->dm, psys->part->from, pa, hairmat);
|
|
}
|
|
|
|
child_keys->steps = ctx->steps;
|
|
|
|
/* get different child parameters from textures & vgroups */
|
|
get_child_modifier_parameters(part, ctx, cpa, cpa_from, cpa_num, cpa_fuv, orco, &ptex);
|
|
|
|
if(ptex.exist < PSYS_FRAND(i + 24)) {
|
|
child_keys->steps = -1;
|
|
return;
|
|
}
|
|
|
|
/* create the child path */
|
|
for(k=0,child=child_keys; k<=ctx->steps; k++,child++){
|
|
if(ctx->between){
|
|
int w=0;
|
|
|
|
zero_v3(child->co);
|
|
zero_v3(child->vel);
|
|
unit_qt(child->rot);
|
|
|
|
for(w=0; w<4; w++) {
|
|
copy_v3_v3(off2[w], off1[w]);
|
|
|
|
if(part->flag & PART_CHILD_LONG_HAIR) {
|
|
/* Use parent rotation (in addition to emission location) to determine child offset. */
|
|
if(k)
|
|
mul_qt_v3((key[w]+k)->rot, off2[w]);
|
|
|
|
/* Fade the effect of rotation for even lengths in the end */
|
|
project_v3_v3v3(dvec, off2[w], (key[w]+k)->vel);
|
|
madd_v3_v3fl(off2[w], dvec, -(float)k/(float)ctx->steps);
|
|
}
|
|
|
|
add_v3_v3(off2[w], (key[w]+k)->co);
|
|
}
|
|
|
|
/* child position is the weighted sum of parent positions */
|
|
interp_v3_v3v3v3v3(child->co, off2[0], off2[1], off2[2], off2[3], weight);
|
|
interp_v3_v3v3v3v3(child->vel, (key[0]+k)->vel, (key[1]+k)->vel, (key[2]+k)->vel, (key[3]+k)->vel, weight);
|
|
|
|
copy_qt_qt(child->rot, (key[0]+k)->rot);
|
|
}
|
|
else{
|
|
if(k) {
|
|
mul_qt_qtqt(rot, (key[0]+k)->rot, key[0]->rot);
|
|
par_rot = rot;
|
|
}
|
|
else {
|
|
par_rot = key[0]->rot;
|
|
}
|
|
/* offset the child from the parent position */
|
|
offset_child(cpa, (ParticleKey*)(key[0]+k), par_rot, (ParticleKey*)child, part->childflat, part->childrad);
|
|
}
|
|
}
|
|
|
|
/* apply effectors */
|
|
if(part->flag & PART_CHILD_EFFECT) {
|
|
for(k=0,child=child_keys; k<=ctx->steps; k++,child++) {
|
|
if(k) {
|
|
do_path_effectors(&ctx->sim, cpa->pa[0], child, k, ctx->steps, child_keys->co, ptex.effector, 0.0f, ctx->cfra, &eff_length, eff_vec);
|
|
}
|
|
else {
|
|
sub_v3_v3v3(eff_vec, (child+1)->co, child->co);
|
|
eff_length = len_v3(eff_vec);
|
|
}
|
|
}
|
|
}
|
|
|
|
for(k=0,child=child_keys; k<=ctx->steps; k++,child++){
|
|
t = (float)k/(float)ctx->steps;
|
|
|
|
if(ctx->totparent)
|
|
/* this is now threadsafe, virtual parents are calculated before rest of children */
|
|
par = (i >= ctx->totparent) ? cache[cpa->parent] : NULL;
|
|
else if(cpa->parent >= 0)
|
|
par = pcache[cpa->parent];
|
|
|
|
if(par) {
|
|
if(k) {
|
|
mul_qt_qtqt(rot, (par+k)->rot, par->rot);
|
|
par_rot = rot;
|
|
}
|
|
else {
|
|
par_rot = par->rot;
|
|
}
|
|
par += k;
|
|
}
|
|
|
|
/* apply different deformations to the child path */
|
|
do_child_modifiers(&ctx->sim, &ptex, (ParticleKey *)par, par_rot, cpa, orco, hairmat, (ParticleKey *)child, t);
|
|
|
|
/* we have to correct velocity because of kink & clump */
|
|
if(k>1){
|
|
sub_v3_v3v3((child-1)->vel, child->co, (child-2)->co);
|
|
mul_v3_fl((child-1)->vel, 0.5);
|
|
|
|
if(ctx->ma && (part->draw_col == PART_DRAW_COL_MAT))
|
|
get_strand_normal(ctx->ma, ornor, cur_length, (child-1)->vel);
|
|
}
|
|
|
|
if(k == ctx->steps)
|
|
sub_v3_v3v3(child->vel, child->co, (child-1)->co);
|
|
|
|
/* check if path needs to be cut before actual end of data points */
|
|
if(k){
|
|
sub_v3_v3v3(dvec, child->co, (child-1)->co);
|
|
length = 1.0f/(float)ctx->steps;
|
|
k = check_path_length(k, child_keys, child, max_length, &cur_length, length, dvec);
|
|
}
|
|
else{
|
|
/* initialize length calculation */
|
|
max_length = ptex.length;
|
|
cur_length = 0.0f;
|
|
}
|
|
|
|
if(ctx->ma && (part->draw_col == PART_DRAW_COL_MAT)) {
|
|
VECCOPY(child->col, &ctx->ma->r)
|
|
get_strand_normal(ctx->ma, ornor, cur_length, child->vel);
|
|
}
|
|
}
|
|
|
|
/* Hide virtual parents */
|
|
if(i < ctx->totparent)
|
|
child_keys->steps = -1;
|
|
}
|
|
|
|
static void *exec_child_path_cache(void *data)
|
|
{
|
|
ParticleThread *thread= (ParticleThread*)data;
|
|
ParticleThreadContext *ctx= thread->ctx;
|
|
ParticleSystem *psys= ctx->sim.psys;
|
|
ParticleCacheKey **cache= psys->childcache;
|
|
ChildParticle *cpa;
|
|
int i, totchild= ctx->totchild, first= 0;
|
|
|
|
if(thread->tot > 1){
|
|
first= ctx->parent_pass? 0 : ctx->totparent;
|
|
totchild= ctx->parent_pass? ctx->totparent : ctx->totchild;
|
|
}
|
|
|
|
cpa= psys->child + first + thread->num;
|
|
for(i=first+thread->num; i<totchild; i+=thread->tot, cpa+=thread->tot)
|
|
psys_thread_create_path(thread, cpa, cache[i], i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void psys_cache_child_paths(ParticleSimulationData *sim, float cfra, int editupdate)
|
|
{
|
|
ParticleThread *pthreads;
|
|
ParticleThreadContext *ctx;
|
|
ListBase threads;
|
|
int i, totchild, totparent, totthread;
|
|
|
|
if(sim->psys->flag & PSYS_GLOBAL_HAIR)
|
|
return;
|
|
|
|
pthreads= psys_threads_create(sim);
|
|
|
|
if(!psys_threads_init_path(pthreads, sim->scene, cfra, editupdate)) {
|
|
psys_threads_free(pthreads);
|
|
return;
|
|
}
|
|
|
|
ctx= pthreads[0].ctx;
|
|
totchild= ctx->totchild;
|
|
totparent= ctx->totparent;
|
|
|
|
if(editupdate && sim->psys->childcache && totchild == sim->psys->totchildcache) {
|
|
; /* just overwrite the existing cache */
|
|
}
|
|
else {
|
|
/* clear out old and create new empty path cache */
|
|
free_child_path_cache(sim->psys);
|
|
sim->psys->childcache= psys_alloc_path_cache_buffers(&sim->psys->childcachebufs, totchild, ctx->steps+1);
|
|
sim->psys->totchildcache = totchild;
|
|
}
|
|
|
|
totthread= pthreads[0].tot;
|
|
|
|
if(totthread > 1) {
|
|
|
|
/* make virtual child parents thread safe by calculating them first */
|
|
if(totparent) {
|
|
BLI_init_threads(&threads, exec_child_path_cache, totthread);
|
|
|
|
for(i=0; i<totthread; i++) {
|
|
pthreads[i].ctx->parent_pass = 1;
|
|
BLI_insert_thread(&threads, &pthreads[i]);
|
|
}
|
|
|
|
BLI_end_threads(&threads);
|
|
|
|
for(i=0; i<totthread; i++)
|
|
pthreads[i].ctx->parent_pass = 0;
|
|
}
|
|
|
|
BLI_init_threads(&threads, exec_child_path_cache, totthread);
|
|
|
|
for(i=0; i<totthread; i++)
|
|
BLI_insert_thread(&threads, &pthreads[i]);
|
|
|
|
BLI_end_threads(&threads);
|
|
}
|
|
else
|
|
exec_child_path_cache(&pthreads[0]);
|
|
|
|
psys_threads_free(pthreads);
|
|
}
|
|
/* figure out incremental rotations along path starting from unit quat */
|
|
static void cache_key_incremental_rotation(ParticleCacheKey *key0, ParticleCacheKey *key1, ParticleCacheKey *key2, float *prev_tangent, int i)
|
|
{
|
|
float cosangle, angle, tangent[3], normal[3], q[4];
|
|
|
|
switch(i) {
|
|
case 0:
|
|
/* start from second key */
|
|
break;
|
|
case 1:
|
|
/* calculate initial tangent for incremental rotations */
|
|
sub_v3_v3v3(prev_tangent, key0->co, key1->co);
|
|
normalize_v3(prev_tangent);
|
|
unit_qt(key1->rot);
|
|
break;
|
|
default:
|
|
sub_v3_v3v3(tangent, key0->co, key1->co);
|
|
normalize_v3(tangent);
|
|
|
|
cosangle= dot_v3v3(tangent, prev_tangent);
|
|
|
|
/* note we do the comparison on cosangle instead of
|
|
* angle, since floating point accuracy makes it give
|
|
* different results across platforms */
|
|
if(cosangle > 0.999999f) {
|
|
QUATCOPY(key1->rot, key2->rot);
|
|
}
|
|
else {
|
|
angle= saacos(cosangle);
|
|
cross_v3_v3v3(normal, prev_tangent, tangent);
|
|
axis_angle_to_quat( q,normal, angle);
|
|
mul_qt_qtqt(key1->rot, q, key2->rot);
|
|
}
|
|
|
|
copy_v3_v3(prev_tangent, tangent);
|
|
}
|
|
}
|
|
/* Calculates paths ready for drawing/rendering. */
|
|
/* -Usefull for making use of opengl vertex arrays for super fast strand drawing. */
|
|
/* -Makes child strands possible and creates them too into the cache. */
|
|
/* -Cached path data is also used to determine cut position for the editmode tool. */
|
|
void psys_cache_paths(ParticleSimulationData *sim, float cfra)
|
|
{
|
|
PARTICLE_PSMD;
|
|
ParticleEditSettings *pset = &sim->scene->toolsettings->particle;
|
|
ParticleSystem *psys = sim->psys;
|
|
ParticleSettings *part = psys->part;
|
|
ParticleCacheKey *ca, **cache;
|
|
|
|
DerivedMesh *hair_dm = (psys->part->type==PART_HAIR && psys->flag & PSYS_HAIR_DYNAMICS) ? psys->hair_out_dm : NULL;
|
|
|
|
ParticleKey result;
|
|
|
|
Material *ma;
|
|
ParticleInterpolationData pind;
|
|
ParticleTexture ptex;
|
|
|
|
PARTICLE_P;
|
|
|
|
float birthtime = 0.0, dietime = 0.0;
|
|
float t, time = 0.0, dfra = 1.0 /* , frs_sec = sim->scene->r.frs_sec*/ /*UNUSED*/;
|
|
float col[4] = {0.5f, 0.5f, 0.5f, 1.0f};
|
|
float prev_tangent[3] = {0.0f, 0.0f, 0.0f}, hairmat[4][4];
|
|
float rotmat[3][3];
|
|
int k;
|
|
int steps = (int)pow(2.0, (double)(psys->renderdata ? part->ren_step : part->draw_step));
|
|
int totpart = psys->totpart;
|
|
float length, vec[3];
|
|
float *vg_effector= NULL;
|
|
float *vg_length= NULL, pa_length=1.0f;
|
|
int keyed, baked;
|
|
|
|
/* we don't have anything valid to create paths from so let's quit here */
|
|
if((psys->flag & PSYS_HAIR_DONE || psys->flag & PSYS_KEYED || psys->pointcache)==0)
|
|
return;
|
|
|
|
if(psys_in_edit_mode(sim->scene, psys))
|
|
if(psys->renderdata==0 && (psys->edit==NULL || pset->flag & PE_DRAW_PART)==0)
|
|
return;
|
|
|
|
BLI_srandom(psys->seed);
|
|
|
|
keyed = psys->flag & PSYS_KEYED;
|
|
baked = psys->pointcache->mem_cache.first && psys->part->type != PART_HAIR;
|
|
|
|
/* clear out old and create new empty path cache */
|
|
psys_free_path_cache(psys, psys->edit);
|
|
cache= psys->pathcache= psys_alloc_path_cache_buffers(&psys->pathcachebufs, totpart, steps+1);
|
|
|
|
psys->lattice = psys_get_lattice(sim);
|
|
ma= give_current_material(sim->ob, psys->part->omat);
|
|
if(ma && (psys->part->draw_col == PART_DRAW_COL_MAT))
|
|
VECCOPY(col, &ma->r)
|
|
|
|
if((psys->flag & PSYS_GLOBAL_HAIR)==0) {
|
|
if((psys->part->flag & PART_CHILD_EFFECT)==0)
|
|
vg_effector = psys_cache_vgroup(psmd->dm, psys, PSYS_VG_EFFECTOR);
|
|
|
|
if(!psys->totchild)
|
|
vg_length = psys_cache_vgroup(psmd->dm, psys, PSYS_VG_LENGTH);
|
|
}
|
|
|
|
/*---first main loop: create all actual particles' paths---*/
|
|
LOOP_SHOWN_PARTICLES {
|
|
if(!psys->totchild) {
|
|
psys_get_texture(sim, pa, &ptex, PAMAP_LENGTH, 0.f);
|
|
pa_length = ptex.length * (1.0f - part->randlength * PSYS_FRAND(psys->seed + p));
|
|
if(vg_length)
|
|
pa_length *= psys_particle_value_from_verts(psmd->dm,part->from,pa,vg_length);
|
|
}
|
|
|
|
pind.keyed = keyed;
|
|
pind.cache = baked ? psys->pointcache : NULL;
|
|
pind.epoint = NULL;
|
|
pind.bspline = (psys->part->flag & PART_HAIR_BSPLINE);
|
|
pind.dm = hair_dm;
|
|
|
|
memset(cache[p], 0, sizeof(*cache[p])*(steps+1));
|
|
|
|
cache[p]->steps = steps;
|
|
|
|
/*--get the first data points--*/
|
|
init_particle_interpolation(sim->ob, sim->psys, pa, &pind);
|
|
|
|
/* hairmat is needed for for non-hair particle too so we get proper rotations */
|
|
psys_mat_hair_to_global(sim->ob, psmd->dm, psys->part->from, pa, hairmat);
|
|
VECCOPY(rotmat[0], hairmat[2]);
|
|
VECCOPY(rotmat[1], hairmat[1]);
|
|
VECCOPY(rotmat[2], hairmat[0]);
|
|
|
|
if(part->draw & PART_ABS_PATH_TIME) {
|
|
birthtime = MAX2(pind.birthtime, part->path_start);
|
|
dietime = MIN2(pind.dietime, part->path_end);
|
|
}
|
|
else {
|
|
float tb = pind.birthtime;
|
|
birthtime = tb + part->path_start * (pind.dietime - tb);
|
|
dietime = tb + part->path_end * (pind.dietime - tb);
|
|
}
|
|
|
|
if(birthtime >= dietime) {
|
|
cache[p]->steps = -1;
|
|
continue;
|
|
}
|
|
|
|
dietime = birthtime + pa_length * (dietime - birthtime);
|
|
|
|
/*--interpolate actual path from data points--*/
|
|
for(k=0, ca=cache[p]; k<=steps; k++, ca++){
|
|
time = (float)k / (float)steps;
|
|
t = birthtime + time * (dietime - birthtime);
|
|
result.time = -t;
|
|
do_particle_interpolation(psys, p, pa, t, &pind, &result);
|
|
copy_v3_v3(ca->co, result.co);
|
|
|
|
/* dynamic hair is in object space */
|
|
/* keyed and baked are already in global space */
|
|
if(hair_dm)
|
|
mul_m4_v3(sim->ob->obmat, ca->co);
|
|
else if(!keyed && !baked && !(psys->flag & PSYS_GLOBAL_HAIR))
|
|
mul_m4_v3(hairmat, ca->co);
|
|
|
|
copy_v3_v3(ca->col, col);
|
|
}
|
|
|
|
/*--modify paths and calculate rotation & velocity--*/
|
|
|
|
if(!(psys->flag & PSYS_GLOBAL_HAIR)) {
|
|
/* apply effectors */
|
|
if((psys->part->flag & PART_CHILD_EFFECT) == 0) {
|
|
float effector= 1.0f;
|
|
if(vg_effector)
|
|
effector*= psys_particle_value_from_verts(psmd->dm,psys->part->from,pa,vg_effector);
|
|
|
|
sub_v3_v3v3(vec,(cache[p]+1)->co,cache[p]->co);
|
|
length = len_v3(vec);
|
|
|
|
for(k=1, ca=cache[p]+1; k<=steps; k++, ca++)
|
|
do_path_effectors(sim, p, ca, k, steps, cache[p]->co, effector, dfra, cfra, &length, vec);
|
|
}
|
|
|
|
/* apply guide curves to path data */
|
|
if(sim->psys->effectors && (psys->part->flag & PART_CHILD_EFFECT)==0) {
|
|
for(k=0, ca=cache[p]; k<=steps; k++, ca++)
|
|
/* ca is safe to cast, since only co and vel are used */
|
|
do_guides(sim->psys->effectors, (ParticleKey*)ca, p, (float)k/(float)steps);
|
|
}
|
|
|
|
/* lattices have to be calculated separately to avoid mixups between effector calculations */
|
|
if(psys->lattice) {
|
|
for(k=0, ca=cache[p]; k<=steps; k++, ca++)
|
|
calc_latt_deform(psys->lattice, ca->co, 1.0f);
|
|
}
|
|
}
|
|
|
|
/* finally do rotation & velocity */
|
|
for(k=1, ca=cache[p]+1; k<=steps; k++, ca++) {
|
|
cache_key_incremental_rotation(ca, ca - 1, ca - 2, prev_tangent, k);
|
|
|
|
if(k == steps)
|
|
copy_qt_qt(ca->rot, (ca - 1)->rot);
|
|
|
|
/* set velocity */
|
|
sub_v3_v3v3(ca->vel, ca->co, (ca-1)->co);
|
|
|
|
if(k==1)
|
|
copy_v3_v3((ca-1)->vel, ca->vel);
|
|
}
|
|
/* First rotation is based on emitting face orientation.
|
|
* This is way better than having flipping rotations resulting
|
|
* from using a global axis as a rotation pole (vec_to_quat()).
|
|
* It's not an ideal solution though since it disregards the
|
|
* initial tangent, but taking that in to account will allow
|
|
* the possibility of flipping again. -jahka
|
|
*/
|
|
mat3_to_quat_is_ok(cache[p]->rot, rotmat);
|
|
}
|
|
|
|
psys->totcached = totpart;
|
|
|
|
if(psys->lattice){
|
|
end_latt_deform(psys->lattice);
|
|
psys->lattice= NULL;
|
|
}
|
|
|
|
if(vg_effector)
|
|
MEM_freeN(vg_effector);
|
|
|
|
if(vg_length)
|
|
MEM_freeN(vg_length);
|
|
}
|
|
void psys_cache_edit_paths(Scene *scene, Object *ob, PTCacheEdit *edit, float cfra)
|
|
{
|
|
ParticleCacheKey *ca, **cache= edit->pathcache;
|
|
ParticleEditSettings *pset = &scene->toolsettings->particle;
|
|
|
|
PTCacheEditPoint *point = NULL;
|
|
PTCacheEditKey *ekey = NULL;
|
|
|
|
ParticleSystem *psys = edit->psys;
|
|
ParticleSystemModifierData *psmd = psys_get_modifier(ob, psys);
|
|
ParticleData *pa = psys ? psys->particles : NULL;
|
|
|
|
ParticleInterpolationData pind;
|
|
ParticleKey result;
|
|
|
|
float birthtime = 0.0f, dietime = 0.0f;
|
|
float t, time = 0.0f, keytime = 0.0f /*, frs_sec */;
|
|
float hairmat[4][4], rotmat[3][3], prev_tangent[3] = {0.0f, 0.0f, 0.0f};
|
|
int k, i;
|
|
int steps = (int)pow(2.0, (double)pset->draw_step);
|
|
int totpart = edit->totpoint, recalc_set=0;
|
|
float sel_col[3];
|
|
float nosel_col[3];
|
|
|
|
steps = MAX2(steps, 4);
|
|
|
|
if(!cache || edit->totpoint != edit->totcached) {
|
|
/* clear out old and create new empty path cache */
|
|
psys_free_path_cache(edit->psys, edit);
|
|
cache= edit->pathcache= psys_alloc_path_cache_buffers(&edit->pathcachebufs, totpart, steps+1);
|
|
|
|
/* set flag for update (child particles check this too) */
|
|
for(i=0, point=edit->points; i<totpart; i++, point++)
|
|
point->flag |= PEP_EDIT_RECALC;
|
|
recalc_set = 1;
|
|
}
|
|
|
|
/* frs_sec = (psys || edit->pid.flag & PTCACHE_VEL_PER_SEC) ? 25.0f : 1.0f; */ /* UNUSED */
|
|
|
|
if(pset->brushtype == PE_BRUSH_WEIGHT) {
|
|
;/* use weight painting colors now... */
|
|
}
|
|
else{
|
|
sel_col[0] = (float)edit->sel_col[0] / 255.0f;
|
|
sel_col[1] = (float)edit->sel_col[1] / 255.0f;
|
|
sel_col[2] = (float)edit->sel_col[2] / 255.0f;
|
|
nosel_col[0] = (float)edit->nosel_col[0] / 255.0f;
|
|
nosel_col[1] = (float)edit->nosel_col[1] / 255.0f;
|
|
nosel_col[2] = (float)edit->nosel_col[2] / 255.0f;
|
|
}
|
|
|
|
/*---first main loop: create all actual particles' paths---*/
|
|
for(i=0, point=edit->points; i<totpart; i++, pa+=pa?1:0, point++){
|
|
if(edit->totcached && !(point->flag & PEP_EDIT_RECALC))
|
|
continue;
|
|
|
|
ekey = point->keys;
|
|
|
|
pind.keyed = 0;
|
|
pind.cache = NULL;
|
|
pind.epoint = point;
|
|
pind.bspline = psys ? (psys->part->flag & PART_HAIR_BSPLINE) : 0;
|
|
pind.dm = NULL;
|
|
|
|
|
|
/* should init_particle_interpolation set this ? */
|
|
if(pset->brushtype==PE_BRUSH_WEIGHT){
|
|
pind.hkey[0] = NULL;
|
|
/* pa != NULL since the weight brush is only available for hair */
|
|
pind.hkey[1] = pa->hair;
|
|
}
|
|
|
|
|
|
memset(cache[i], 0, sizeof(*cache[i])*(steps+1));
|
|
|
|
cache[i]->steps = steps;
|
|
|
|
/*--get the first data points--*/
|
|
init_particle_interpolation(ob, psys, pa, &pind);
|
|
|
|
if(psys) {
|
|
psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, pa, hairmat);
|
|
copy_v3_v3(rotmat[0], hairmat[2]);
|
|
copy_v3_v3(rotmat[1], hairmat[1]);
|
|
copy_v3_v3(rotmat[2], hairmat[0]);
|
|
}
|
|
|
|
birthtime = pind.birthtime;
|
|
dietime = pind.dietime;
|
|
|
|
if(birthtime >= dietime) {
|
|
cache[i]->steps = -1;
|
|
continue;
|
|
}
|
|
|
|
/*--interpolate actual path from data points--*/
|
|
for(k=0, ca=cache[i]; k<=steps; k++, ca++){
|
|
time = (float)k / (float)steps;
|
|
t = birthtime + time * (dietime - birthtime);
|
|
result.time = -t;
|
|
do_particle_interpolation(psys, i, pa, t, &pind, &result);
|
|
copy_v3_v3(ca->co, result.co);
|
|
|
|
/* non-hair points are already in global space */
|
|
if(psys && !(psys->flag & PSYS_GLOBAL_HAIR)) {
|
|
mul_m4_v3(hairmat, ca->co);
|
|
|
|
if(k) {
|
|
cache_key_incremental_rotation(ca, ca - 1, ca - 2, prev_tangent, k);
|
|
|
|
if(k == steps)
|
|
copy_qt_qt(ca->rot, (ca - 1)->rot);
|
|
|
|
/* set velocity */
|
|
sub_v3_v3v3(ca->vel, ca->co, (ca - 1)->co);
|
|
|
|
if(k==1)
|
|
copy_v3_v3((ca - 1)->vel, ca->vel);
|
|
}
|
|
}
|
|
else {
|
|
ca->vel[0] = ca->vel[1] = 0.0f;
|
|
ca->vel[1] = 1.0f;
|
|
}
|
|
|
|
/* selection coloring in edit mode */
|
|
if(pset->brushtype==PE_BRUSH_WEIGHT){
|
|
float t2;
|
|
|
|
if(k==0) {
|
|
weight_to_rgb(pind.hkey[1]->weight, ca->col, ca->col+1, ca->col+2);
|
|
} else {
|
|
float w1[3], w2[3];
|
|
keytime = (t - (*pind.ekey[0]->time))/((*pind.ekey[1]->time) - (*pind.ekey[0]->time));
|
|
|
|
weight_to_rgb(pind.hkey[0]->weight, w1, w1+1, w1+2);
|
|
weight_to_rgb(pind.hkey[1]->weight, w2, w2+1, w2+2);
|
|
|
|
interp_v3_v3v3(ca->col, w1, w2, keytime);
|
|
}
|
|
|
|
/* at the moment this is only used for weight painting.
|
|
* will need to move out of this check if its used elsewhere. */
|
|
t2 = birthtime + ((float)k/(float)steps) * (dietime - birthtime);
|
|
|
|
while (pind.hkey[1]->time < t2) pind.hkey[1]++;
|
|
pind.hkey[0] = pind.hkey[1] - 1;
|
|
}
|
|
else {
|
|
if((ekey + (pind.ekey[0] - point->keys))->flag & PEK_SELECT){
|
|
if((ekey + (pind.ekey[1] - point->keys))->flag & PEK_SELECT){
|
|
VECCOPY(ca->col, sel_col);
|
|
}
|
|
else{
|
|
keytime = (t - (*pind.ekey[0]->time))/((*pind.ekey[1]->time) - (*pind.ekey[0]->time));
|
|
interp_v3_v3v3(ca->col, sel_col, nosel_col, keytime);
|
|
}
|
|
}
|
|
else{
|
|
if((ekey + (pind.ekey[1] - point->keys))->flag & PEK_SELECT){
|
|
keytime = (t - (*pind.ekey[0]->time))/((*pind.ekey[1]->time) - (*pind.ekey[0]->time));
|
|
interp_v3_v3v3(ca->col, nosel_col, sel_col, keytime);
|
|
}
|
|
else{
|
|
VECCOPY(ca->col, nosel_col);
|
|
}
|
|
}
|
|
}
|
|
|
|
ca->time = t;
|
|
}
|
|
if(psys && !(psys->flag & PSYS_GLOBAL_HAIR)) {
|
|
/* First rotation is based on emitting face orientation.
|
|
* This is way better than having flipping rotations resulting
|
|
* from using a global axis as a rotation pole (vec_to_quat()).
|
|
* It's not an ideal solution though since it disregards the
|
|
* initial tangent, but taking that in to account will allow
|
|
* the possibility of flipping again. -jahka
|
|
*/
|
|
mat3_to_quat_is_ok(cache[i]->rot, rotmat);
|
|
}
|
|
}
|
|
|
|
edit->totcached = totpart;
|
|
|
|
if(psys) {
|
|
ParticleSimulationData sim= {0};
|
|
sim.scene= scene;
|
|
sim.ob= ob;
|
|
sim.psys= psys;
|
|
sim.psmd= psys_get_modifier(ob, psys);
|
|
|
|
psys_cache_child_paths(&sim, cfra, 1);
|
|
}
|
|
|
|
/* clear recalc flag if set here */
|
|
if(recalc_set) {
|
|
for(i=0, point=edit->points; i<totpart; i++, point++)
|
|
point->flag &= ~PEP_EDIT_RECALC;
|
|
}
|
|
}
|
|
/************************************************/
|
|
/* Particle Key handling */
|
|
/************************************************/
|
|
void copy_particle_key(ParticleKey *to, ParticleKey *from, int time){
|
|
if(time){
|
|
memcpy(to,from,sizeof(ParticleKey));
|
|
}
|
|
else{
|
|
float to_time=to->time;
|
|
memcpy(to,from,sizeof(ParticleKey));
|
|
to->time=to_time;
|
|
}
|
|
}
|
|
void psys_get_from_key(ParticleKey *key, float *loc, float *vel, float *rot, float *time){
|
|
if(loc) VECCOPY(loc,key->co);
|
|
if(vel) VECCOPY(vel,key->vel);
|
|
if(rot) QUATCOPY(rot,key->rot);
|
|
if(time) *time=key->time;
|
|
}
|
|
/*-------changing particle keys from space to another-------*/
|
|
#if 0
|
|
static void key_from_object(Object *ob, ParticleKey *key){
|
|
float q[4];
|
|
|
|
VECADD(key->vel,key->vel,key->co);
|
|
|
|
mul_m4_v3(ob->obmat,key->co);
|
|
mul_m4_v3(ob->obmat,key->vel);
|
|
mat4_to_quat(q,ob->obmat);
|
|
|
|
VECSUB(key->vel,key->vel,key->co);
|
|
mul_qt_qtqt(key->rot,q,key->rot);
|
|
}
|
|
#endif
|
|
|
|
static void triatomat(float *v1, float *v2, float *v3, float (*uv)[2], float mat[][4])
|
|
{
|
|
float det, w1, w2, d1[2], d2[2];
|
|
|
|
memset(mat, 0, sizeof(float)*4*4);
|
|
mat[3][3]= 1.0f;
|
|
|
|
/* first axis is the normal */
|
|
normal_tri_v3( mat[2],v1, v2, v3);
|
|
|
|
/* second axis along (1, 0) in uv space */
|
|
if(uv) {
|
|
d1[0]= uv[1][0] - uv[0][0];
|
|
d1[1]= uv[1][1] - uv[0][1];
|
|
d2[0]= uv[2][0] - uv[0][0];
|
|
d2[1]= uv[2][1] - uv[0][1];
|
|
|
|
det = d2[0]*d1[1] - d2[1]*d1[0];
|
|
|
|
if(det != 0.0f) {
|
|
det= 1.0f/det;
|
|
w1= -d2[1]*det;
|
|
w2= d1[1]*det;
|
|
|
|
mat[1][0]= w1*(v2[0] - v1[0]) + w2*(v3[0] - v1[0]);
|
|
mat[1][1]= w1*(v2[1] - v1[1]) + w2*(v3[1] - v1[1]);
|
|
mat[1][2]= w1*(v2[2] - v1[2]) + w2*(v3[2] - v1[2]);
|
|
normalize_v3(mat[1]);
|
|
}
|
|
else
|
|
mat[1][0]= mat[1][1]= mat[1][2]= 0.0f;
|
|
}
|
|
else {
|
|
sub_v3_v3v3(mat[1], v2, v1);
|
|
normalize_v3(mat[1]);
|
|
}
|
|
|
|
/* third as a cross product */
|
|
cross_v3_v3v3(mat[0], mat[1], mat[2]);
|
|
}
|
|
|
|
static void psys_face_mat(Object *ob, DerivedMesh *dm, ParticleData *pa, float mat[][4], int orco)
|
|
{
|
|
float v[3][3];
|
|
MFace *mface;
|
|
OrigSpaceFace *osface;
|
|
float (*orcodata)[3];
|
|
|
|
int i = pa->num_dmcache==DMCACHE_NOTFOUND ? pa->num : pa->num_dmcache;
|
|
|
|
if (i==-1 || i >= dm->getNumFaces(dm)) { unit_m4(mat); return; }
|
|
|
|
mface=dm->getFaceData(dm,i,CD_MFACE);
|
|
osface=dm->getFaceData(dm,i,CD_ORIGSPACE);
|
|
|
|
if(orco && (orcodata=dm->getVertDataArray(dm, CD_ORCO))) {
|
|
VECCOPY(v[0], orcodata[mface->v1]);
|
|
VECCOPY(v[1], orcodata[mface->v2]);
|
|
VECCOPY(v[2], orcodata[mface->v3]);
|
|
|
|
/* ugly hack to use non-transformed orcos, since only those
|
|
* give symmetric results for mirroring in particle mode */
|
|
if(DM_get_vert_data_layer(dm, CD_ORIGINDEX))
|
|
transform_mesh_orco_verts(ob->data, v, 3, 1);
|
|
}
|
|
else {
|
|
dm->getVertCo(dm,mface->v1,v[0]);
|
|
dm->getVertCo(dm,mface->v2,v[1]);
|
|
dm->getVertCo(dm,mface->v3,v[2]);
|
|
}
|
|
|
|
triatomat(v[0], v[1], v[2], (osface)? osface->uv: NULL, mat);
|
|
}
|
|
|
|
void psys_mat_hair_to_object(Object *UNUSED(ob), DerivedMesh *dm, short from, ParticleData *pa, float hairmat[][4])
|
|
{
|
|
float vec[3];
|
|
|
|
psys_face_mat(0, dm, pa, hairmat, 0);
|
|
psys_particle_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, vec, 0, 0, 0, 0, 0);
|
|
VECCOPY(hairmat[3],vec);
|
|
}
|
|
|
|
void psys_mat_hair_to_orco(Object *ob, DerivedMesh *dm, short from, ParticleData *pa, float hairmat[][4])
|
|
{
|
|
float vec[3], orco[3];
|
|
|
|
psys_face_mat(ob, dm, pa, hairmat, 1);
|
|
psys_particle_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, vec, 0, 0, 0, orco, 0);
|
|
|
|
/* see psys_face_mat for why this function is called */
|
|
if(DM_get_vert_data_layer(dm, CD_ORIGINDEX))
|
|
transform_mesh_orco_verts(ob->data, &orco, 1, 1);
|
|
VECCOPY(hairmat[3],orco);
|
|
}
|
|
|
|
void psys_vec_rot_to_face(DerivedMesh *dm, ParticleData *pa, float *vec)
|
|
{
|
|
float mat[4][4];
|
|
|
|
psys_face_mat(0, dm, pa, mat, 0);
|
|
transpose_m4(mat); /* cheap inverse for rotation matrix */
|
|
mul_mat3_m4_v3(mat, vec);
|
|
}
|
|
|
|
void psys_mat_hair_to_global(Object *ob, DerivedMesh *dm, short from, ParticleData *pa, float hairmat[][4])
|
|
{
|
|
float facemat[4][4];
|
|
|
|
psys_mat_hair_to_object(ob, dm, from, pa, facemat);
|
|
|
|
mul_m4_m4m4(hairmat, facemat, ob->obmat);
|
|
}
|
|
|
|
/************************************************/
|
|
/* ParticleSettings handling */
|
|
/************************************************/
|
|
ModifierData *object_add_particle_system(Scene *scene, Object *ob, const char *name)
|
|
{
|
|
ParticleSystem *psys;
|
|
ModifierData *md;
|
|
ParticleSystemModifierData *psmd;
|
|
|
|
if(!ob || ob->type != OB_MESH)
|
|
return NULL;
|
|
|
|
psys = ob->particlesystem.first;
|
|
for(; psys; psys=psys->next)
|
|
psys->flag &= ~PSYS_CURRENT;
|
|
|
|
psys = MEM_callocN(sizeof(ParticleSystem), "particle_system");
|
|
psys->pointcache = BKE_ptcache_add(&psys->ptcaches);
|
|
BLI_addtail(&ob->particlesystem, psys);
|
|
|
|
psys->part = psys_new_settings("ParticleSettings", NULL);
|
|
|
|
if(BLI_countlist(&ob->particlesystem)>1)
|
|
sprintf(psys->name, "ParticleSystem %i", BLI_countlist(&ob->particlesystem));
|
|
else
|
|
strcpy(psys->name, "ParticleSystem");
|
|
|
|
md= modifier_new(eModifierType_ParticleSystem);
|
|
|
|
if(name) BLI_strncpy(md->name, name, sizeof(md->name));
|
|
else sprintf(md->name, "ParticleSystem %i", BLI_countlist(&ob->particlesystem));
|
|
modifier_unique_name(&ob->modifiers, md);
|
|
|
|
psmd= (ParticleSystemModifierData*) md;
|
|
psmd->psys=psys;
|
|
BLI_addtail(&ob->modifiers, md);
|
|
|
|
psys->totpart=0;
|
|
psys->flag = PSYS_ENABLED|PSYS_CURRENT;
|
|
psys->cfra=bsystem_time(scene,ob,scene->r.cfra+1,0.0);
|
|
|
|
DAG_scene_sort(G.main, scene);
|
|
DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
|
|
|
|
return md;
|
|
}
|
|
void object_remove_particle_system(Scene *scene, Object *ob)
|
|
{
|
|
ParticleSystem *psys = psys_get_current(ob);
|
|
ParticleSystemModifierData *psmd;
|
|
ModifierData *md;
|
|
|
|
if(!psys)
|
|
return;
|
|
|
|
/* clear all other appearances of this pointer (like on smoke flow modifier) */
|
|
if((md = modifiers_findByType(ob, eModifierType_Smoke)))
|
|
{
|
|
SmokeModifierData *smd = (SmokeModifierData *)md;
|
|
if((smd->type == MOD_SMOKE_TYPE_FLOW) && smd->flow && smd->flow->psys)
|
|
if(smd->flow->psys == psys)
|
|
smd->flow->psys = NULL;
|
|
}
|
|
|
|
if((md = modifiers_findByType(ob, eModifierType_DynamicPaint)))
|
|
{
|
|
DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)md;
|
|
if((pmd->type == MOD_DYNAMICPAINT_TYPE_BRUSH) && pmd->brush && pmd->brush->psys)
|
|
if(pmd->brush->psys == psys)
|
|
pmd->brush->psys = NULL;
|
|
}
|
|
|
|
/* clear modifier */
|
|
psmd= psys_get_modifier(ob, psys);
|
|
BLI_remlink(&ob->modifiers, psmd);
|
|
modifier_free((ModifierData *)psmd);
|
|
|
|
/* clear particle system */
|
|
BLI_remlink(&ob->particlesystem, psys);
|
|
psys_free(ob,psys);
|
|
|
|
if(ob->particlesystem.first)
|
|
((ParticleSystem *) ob->particlesystem.first)->flag |= PSYS_CURRENT;
|
|
else
|
|
ob->mode &= ~OB_MODE_PARTICLE_EDIT;
|
|
|
|
DAG_scene_sort(G.main, scene);
|
|
DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
|
|
}
|
|
static void default_particle_settings(ParticleSettings *part)
|
|
{
|
|
part->type= PART_EMITTER;
|
|
part->distr= PART_DISTR_JIT;
|
|
part->draw_as = PART_DRAW_REND;
|
|
part->ren_as = PART_DRAW_HALO;
|
|
part->bb_uv_split=1;
|
|
part->bb_align=PART_BB_VIEW;
|
|
part->bb_split_offset=PART_BB_OFF_LINEAR;
|
|
part->flag=PART_EDISTR|PART_TRAND|PART_HIDE_ADVANCED_HAIR;
|
|
|
|
part->sta= 1.0;
|
|
part->end= 200.0;
|
|
part->lifetime= 50.0;
|
|
part->jitfac= 1.0;
|
|
part->totpart= 1000;
|
|
part->grid_res= 10;
|
|
part->timetweak= 1.0;
|
|
|
|
part->integrator= PART_INT_MIDPOINT;
|
|
part->phystype= PART_PHYS_NEWTON;
|
|
part->hair_step= 5;
|
|
part->keys_step= 5;
|
|
part->draw_step= 2;
|
|
part->ren_step= 3;
|
|
part->adapt_angle= 5;
|
|
part->adapt_pix= 3;
|
|
part->kink_axis= 2;
|
|
part->kink_amp_clump= 1.f;
|
|
part->reactevent= PART_EVENT_DEATH;
|
|
part->disp=100;
|
|
part->from= PART_FROM_FACE;
|
|
|
|
part->normfac= 1.0f;
|
|
|
|
part->mass=1.0;
|
|
part->size=0.05;
|
|
part->childsize=1.0;
|
|
|
|
part->rotmode = PART_ROT_VEL;
|
|
part->avemode = PART_AVE_SPIN;
|
|
|
|
part->child_nbr=10;
|
|
part->ren_child_nbr=100;
|
|
part->childrad=0.2f;
|
|
part->childflat=0.0f;
|
|
part->clumppow=0.0f;
|
|
part->kink_amp=0.2f;
|
|
part->kink_freq=2.0;
|
|
|
|
part->rough1_size=1.0;
|
|
part->rough2_size=1.0;
|
|
part->rough_end_shape=1.0;
|
|
|
|
part->clength=1.0f;
|
|
part->clength_thres=0.0f;
|
|
|
|
part->draw= PART_DRAW_EMITTER;
|
|
part->draw_line[0]=0.5;
|
|
part->path_start = 0.0f;
|
|
part->path_end = 1.0f;
|
|
|
|
part->bb_size[0] = part->bb_size[1] = 1.0f;
|
|
|
|
part->keyed_loops = 1;
|
|
|
|
part->color_vec_max = 1.f;
|
|
part->draw_col = PART_DRAW_COL_MAT;
|
|
|
|
part->simplify_refsize= 1920;
|
|
part->simplify_rate= 1.0f;
|
|
part->simplify_transition= 0.1f;
|
|
part->simplify_viewport= 0.8;
|
|
|
|
if(!part->effector_weights)
|
|
part->effector_weights = BKE_add_effector_weights(NULL);
|
|
}
|
|
|
|
|
|
ParticleSettings *psys_new_settings(const char *name, Main *main)
|
|
{
|
|
ParticleSettings *part;
|
|
|
|
if(main==NULL)
|
|
main = G.main;
|
|
|
|
part= alloc_libblock(&main->particle, ID_PA, name);
|
|
|
|
default_particle_settings(part);
|
|
|
|
return part;
|
|
}
|
|
|
|
ParticleSettings *psys_copy_settings(ParticleSettings *part)
|
|
{
|
|
ParticleSettings *partn;
|
|
int a;
|
|
|
|
partn= copy_libblock(part);
|
|
partn->pd= MEM_dupallocN(part->pd);
|
|
partn->pd2= MEM_dupallocN(part->pd2);
|
|
partn->effector_weights= MEM_dupallocN(part->effector_weights);
|
|
partn->fluid= MEM_dupallocN(part->fluid);
|
|
|
|
partn->boids = boid_copy_settings(part->boids);
|
|
|
|
for(a=0; a<MAX_MTEX; a++) {
|
|
if(part->mtex[a]) {
|
|
partn->mtex[a]= MEM_mallocN(sizeof(MTex), "psys_copy_tex");
|
|
memcpy(partn->mtex[a], part->mtex[a], sizeof(MTex));
|
|
id_us_plus((ID *)partn->mtex[a]->tex);
|
|
}
|
|
}
|
|
|
|
BLI_duplicatelist(&partn->dupliweights, &part->dupliweights);
|
|
|
|
return partn;
|
|
}
|
|
|
|
static void expand_local_particlesettings(ParticleSettings *part)
|
|
{
|
|
int i;
|
|
id_lib_extern((ID *)part->dup_group);
|
|
|
|
for(i=0; i<MAX_MTEX; i++) {
|
|
if(part->mtex[i]) id_lib_extern((ID *)part->mtex[i]->tex);
|
|
}
|
|
}
|
|
|
|
void make_local_particlesettings(ParticleSettings *part)
|
|
{
|
|
Main *bmain= G.main;
|
|
Object *ob;
|
|
int local=0, lib=0;
|
|
|
|
/* - only lib users: do nothing
|
|
* - only local users: set flag
|
|
* - mixed: make copy
|
|
*/
|
|
|
|
if(part->id.lib==0) return;
|
|
if(part->id.us==1) {
|
|
part->id.lib= 0;
|
|
part->id.flag= LIB_LOCAL;
|
|
new_id(&bmain->particle, (ID *)part, 0);
|
|
expand_local_particlesettings(part);
|
|
return;
|
|
}
|
|
|
|
/* test objects */
|
|
for(ob= bmain->object.first; ob && ELEM(0, lib, local); ob= ob->id.next) {
|
|
ParticleSystem *psys=ob->particlesystem.first;
|
|
for(; psys; psys=psys->next){
|
|
if(psys->part==part) {
|
|
if(ob->id.lib) lib= 1;
|
|
else local= 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(local && lib==0) {
|
|
part->id.lib= 0;
|
|
part->id.flag= LIB_LOCAL;
|
|
new_id(&bmain->particle, (ID *)part, 0);
|
|
expand_local_particlesettings(part);
|
|
}
|
|
else if(local && lib) {
|
|
ParticleSettings *partn= psys_copy_settings(part);
|
|
partn->id.us= 0;
|
|
|
|
/* do objects */
|
|
for(ob= bmain->object.first; ob; ob= ob->id.next) {
|
|
ParticleSystem *psys;
|
|
for(psys= ob->particlesystem.first; psys; psys=psys->next){
|
|
if(psys->part==part && ob->id.lib==0) {
|
|
psys->part= partn;
|
|
partn->id.us++;
|
|
part->id.us--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/************************************************/
|
|
/* Textures */
|
|
/************************************************/
|
|
|
|
static int get_particle_uv(DerivedMesh *dm, ParticleData *pa, int face_index, float *fuv, char *name, float *texco)
|
|
{
|
|
MFace *mf;
|
|
MTFace *tf;
|
|
int i;
|
|
|
|
tf= CustomData_get_layer_named(&dm->faceData, CD_MTFACE, name);
|
|
|
|
if(tf == NULL)
|
|
tf= CustomData_get_layer(&dm->faceData, CD_MTFACE);
|
|
|
|
if(tf == NULL)
|
|
return 0;
|
|
|
|
if(pa) {
|
|
i= (pa->num_dmcache==DMCACHE_NOTFOUND)? pa->num: pa->num_dmcache;
|
|
if(i >= dm->getNumFaces(dm))
|
|
i = -1;
|
|
}
|
|
else
|
|
i= face_index;
|
|
|
|
if (i==-1) {
|
|
texco[0]= 0.0f;
|
|
texco[1]= 0.0f;
|
|
texco[2]= 0.0f;
|
|
}
|
|
else {
|
|
mf= dm->getFaceData(dm, i, CD_MFACE);
|
|
|
|
psys_interpolate_uvs(&tf[i], mf->v4, fuv, texco);
|
|
|
|
texco[0]= texco[0]*2.0f - 1.0f;
|
|
texco[1]= texco[1]*2.0f - 1.0f;
|
|
texco[2]= 0.0f;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
#define SET_PARTICLE_TEXTURE(type, pvalue, texfac) if((event & mtex->mapto) & type) {pvalue = texture_value_blend(def, pvalue, value, texfac, blend);}
|
|
#define CLAMP_PARTICLE_TEXTURE_POS(type, pvalue) if(event & type) { if(pvalue < 0.f) pvalue = 1.f+pvalue; CLAMP(pvalue, 0.0f, 1.0f); }
|
|
#define CLAMP_PARTICLE_TEXTURE_POSNEG(type, pvalue) if(event & type) { CLAMP(pvalue, -1.0f, 1.0f); }
|
|
|
|
static void get_cpa_texture(DerivedMesh *dm, ParticleSystem *psys, ParticleSettings *part, ParticleData *par, int child_index, int face_index, float *fw, float *orco, ParticleTexture *ptex, int event, float cfra)
|
|
{
|
|
MTex *mtex, **mtexp = part->mtex;
|
|
int m;
|
|
float value, rgba[4], texvec[3];
|
|
|
|
ptex->ivel = ptex->life = ptex->exist = ptex->size = ptex->damp =
|
|
ptex->gravity = ptex->field = ptex->time = ptex->clump = ptex->kink =
|
|
ptex->effector = ptex->rough1 = ptex->rough2 = ptex->roughe = 1.f;
|
|
|
|
ptex->length= 1.0f - part->randlength * PSYS_FRAND(child_index + 26);
|
|
ptex->length*= part->clength_thres < PSYS_FRAND(child_index + 27) ? part->clength : 1.0f;
|
|
|
|
for(m=0; m<MAX_MTEX; m++, mtexp++){
|
|
mtex = *mtexp;
|
|
if(mtex && mtex->mapto){
|
|
float def=mtex->def_var;
|
|
short blend=mtex->blendtype;
|
|
short texco = mtex->texco;
|
|
|
|
if(ELEM(texco, TEXCO_UV, TEXCO_ORCO) && (ELEM(part->from, PART_FROM_FACE, PART_FROM_VOLUME) == 0 || part->distr == PART_DISTR_GRID))
|
|
texco = TEXCO_GLOB;
|
|
|
|
switch(texco) {
|
|
case TEXCO_GLOB:
|
|
copy_v3_v3(texvec, par->state.co);
|
|
break;
|
|
case TEXCO_OBJECT:
|
|
copy_v3_v3(texvec, par->state.co);
|
|
if(mtex->object)
|
|
mul_m4_v3(mtex->object->imat, texvec);
|
|
break;
|
|
case TEXCO_UV:
|
|
if(fw && get_particle_uv(dm, NULL, face_index, fw, mtex->uvname, texvec))
|
|
break;
|
|
/* no break, failed to get uv's, so let's try orco's */
|
|
case TEXCO_ORCO:
|
|
copy_v3_v3(texvec, orco);
|
|
break;
|
|
case TEXCO_PARTICLE:
|
|
/* texture coordinates in range [-1,1] */
|
|
texvec[0] = 2.f * (cfra - par->time)/(par->dietime-par->time) - 1.f;
|
|
texvec[1] = 0.f;
|
|
texvec[2] = 0.f;
|
|
break;
|
|
}
|
|
|
|
externtex(mtex, texvec, &value, rgba, rgba+1, rgba+2, rgba+3, 0);
|
|
|
|
if((event & mtex->mapto) & PAMAP_ROUGH)
|
|
ptex->rough1= ptex->rough2= ptex->roughe= texture_value_blend(def,ptex->rough1,value,mtex->roughfac,blend);
|
|
|
|
SET_PARTICLE_TEXTURE(PAMAP_LENGTH, ptex->length, mtex->lengthfac);
|
|
SET_PARTICLE_TEXTURE(PAMAP_CLUMP, ptex->clump, mtex->clumpfac);
|
|
SET_PARTICLE_TEXTURE(PAMAP_KINK, ptex->kink, mtex->kinkfac);
|
|
SET_PARTICLE_TEXTURE(PAMAP_DENS, ptex->exist, mtex->padensfac);
|
|
}
|
|
}
|
|
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_LENGTH, ptex->length);
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_CLUMP, ptex->clump);
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_KINK, ptex->kink);
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_ROUGH, ptex->rough1);
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_DENS, ptex->exist);
|
|
}
|
|
void psys_get_texture(ParticleSimulationData *sim, ParticleData *pa, ParticleTexture *ptex, int event, float cfra)
|
|
{
|
|
ParticleSettings *part = sim->psys->part;
|
|
MTex **mtexp = part->mtex;
|
|
MTex *mtex;
|
|
int m;
|
|
float value, rgba[4], co[3], texvec[3];
|
|
int setvars=0;
|
|
|
|
/* initialize ptex */
|
|
ptex->ivel = ptex->life = ptex->exist = ptex->size = ptex->damp =
|
|
ptex->gravity = ptex->field = ptex->length = ptex->clump = ptex->kink =
|
|
ptex->effector = ptex->rough1 = ptex->rough2 = ptex->roughe = 1.f;
|
|
|
|
ptex->time = (float)(pa - sim->psys->particles)/(float)sim->psys->totpart;
|
|
|
|
for(m=0; m<MAX_MTEX; m++, mtexp++){
|
|
mtex = *mtexp;
|
|
if(mtex && mtex->mapto){
|
|
float def=mtex->def_var;
|
|
short blend=mtex->blendtype;
|
|
short texco = mtex->texco;
|
|
|
|
if(texco == TEXCO_UV && (ELEM(part->from, PART_FROM_FACE, PART_FROM_VOLUME) == 0 || part->distr == PART_DISTR_GRID))
|
|
texco = TEXCO_GLOB;
|
|
|
|
switch(texco) {
|
|
case TEXCO_GLOB:
|
|
copy_v3_v3(texvec, pa->state.co);
|
|
break;
|
|
case TEXCO_OBJECT:
|
|
copy_v3_v3(texvec, pa->state.co);
|
|
if(mtex->object)
|
|
mul_m4_v3(mtex->object->imat, texvec);
|
|
break;
|
|
case TEXCO_UV:
|
|
if(get_particle_uv(sim->psmd->dm, pa, 0, pa->fuv, mtex->uvname, texvec))
|
|
break;
|
|
/* no break, failed to get uv's, so let's try orco's */
|
|
case TEXCO_ORCO:
|
|
psys_particle_on_emitter(sim->psmd,sim->psys->part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co,0,0,0,texvec, 0);
|
|
break;
|
|
case TEXCO_PARTICLE:
|
|
/* texture coordinates in range [-1,1] */
|
|
texvec[0] = 2.f * (cfra - pa->time)/(pa->dietime-pa->time) - 1.f;
|
|
texvec[1] = 0.f;
|
|
texvec[2] = 0.f;
|
|
break;
|
|
}
|
|
|
|
externtex(mtex, texvec, &value, rgba, rgba+1, rgba+2, rgba+3, 0);
|
|
|
|
if((event & mtex->mapto) & PAMAP_TIME) {
|
|
/* the first time has to set the base value for time regardless of blend mode */
|
|
if((setvars&MAP_PA_TIME)==0){
|
|
int flip= (mtex->timefac < 0.0f);
|
|
float timefac= fabsf(mtex->timefac);
|
|
ptex->time *= 1.0f - timefac;
|
|
ptex->time += timefac * ((flip)? 1.0f - value : value);
|
|
setvars |= MAP_PA_TIME;
|
|
}
|
|
else
|
|
ptex->time= texture_value_blend(def,ptex->time,value,mtex->timefac,blend);
|
|
}
|
|
SET_PARTICLE_TEXTURE(PAMAP_LIFE, ptex->life, mtex->lifefac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_DENS, ptex->exist, mtex->padensfac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_SIZE, ptex->size, mtex->sizefac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_IVEL, ptex->ivel, mtex->ivelfac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_FIELD, ptex->field, mtex->fieldfac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_GRAVITY, ptex->gravity, mtex->gravityfac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_DAMP, ptex->damp, mtex->dampfac)
|
|
SET_PARTICLE_TEXTURE(PAMAP_LENGTH, ptex->length, mtex->lengthfac)
|
|
}
|
|
}
|
|
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_TIME, ptex->time)
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_LIFE, ptex->life)
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_DENS, ptex->exist)
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_SIZE, ptex->size)
|
|
CLAMP_PARTICLE_TEXTURE_POSNEG(PAMAP_IVEL, ptex->ivel)
|
|
CLAMP_PARTICLE_TEXTURE_POSNEG(PAMAP_FIELD, ptex->field)
|
|
CLAMP_PARTICLE_TEXTURE_POSNEG(PAMAP_GRAVITY, ptex->gravity)
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_DAMP, ptex->damp)
|
|
CLAMP_PARTICLE_TEXTURE_POS(PAMAP_LENGTH, ptex->length)
|
|
}
|
|
/************************************************/
|
|
/* Particle State */
|
|
/************************************************/
|
|
float psys_get_timestep(ParticleSimulationData *sim)
|
|
{
|
|
return 0.04f * sim->psys->part->timetweak;
|
|
}
|
|
float psys_get_child_time(ParticleSystem *psys, ChildParticle *cpa, float cfra, float *birthtime, float *dietime)
|
|
{
|
|
ParticleSettings *part = psys->part;
|
|
float time, life;
|
|
|
|
if(part->childtype==PART_CHILD_FACES){
|
|
int w=0;
|
|
time=0.0;
|
|
while(w<4 && cpa->pa[w]>=0){
|
|
time+=cpa->w[w]*(psys->particles+cpa->pa[w])->time;
|
|
w++;
|
|
}
|
|
|
|
life = part->lifetime * (1.0f - part->randlife * PSYS_FRAND(cpa - psys->child + 25));
|
|
}
|
|
else{
|
|
ParticleData *pa = psys->particles + cpa->parent;
|
|
|
|
time = pa->time;
|
|
life = pa->lifetime;
|
|
}
|
|
|
|
if(birthtime)
|
|
*birthtime = time;
|
|
if(dietime)
|
|
*dietime = time+life;
|
|
|
|
return (cfra-time)/life;
|
|
}
|
|
float psys_get_child_size(ParticleSystem *psys, ChildParticle *cpa, float UNUSED(cfra), float *UNUSED(pa_time))
|
|
{
|
|
ParticleSettings *part = psys->part;
|
|
float size; // time XXX
|
|
|
|
if(part->childtype==PART_CHILD_FACES)
|
|
size=part->size;
|
|
else
|
|
size=psys->particles[cpa->parent].size;
|
|
|
|
size*=part->childsize;
|
|
|
|
if(part->childrandsize != 0.0f)
|
|
size *= 1.0f - part->childrandsize * PSYS_FRAND(cpa - psys->child + 26);
|
|
|
|
return size;
|
|
}
|
|
static void get_child_modifier_parameters(ParticleSettings *part, ParticleThreadContext *ctx, ChildParticle *cpa, short cpa_from, int cpa_num, float *cpa_fuv, float *orco, ParticleTexture *ptex)
|
|
{
|
|
ParticleSystem *psys = ctx->sim.psys;
|
|
int i = cpa - psys->child;
|
|
|
|
get_cpa_texture(ctx->dm, psys, part, psys->particles + cpa->pa[0], i, cpa_num, cpa_fuv, orco, ptex, PAMAP_DENS|PAMAP_CHILD, psys->cfra);
|
|
|
|
|
|
if(ptex->exist < PSYS_FRAND(i + 24))
|
|
return;
|
|
|
|
if(ctx->vg_length)
|
|
ptex->length*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_length);
|
|
if(ctx->vg_clump)
|
|
ptex->clump*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_clump);
|
|
if(ctx->vg_kink)
|
|
ptex->kink*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_kink);
|
|
if(ctx->vg_rough1)
|
|
ptex->rough1*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_rough1);
|
|
if(ctx->vg_rough2)
|
|
ptex->rough2*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_rough2);
|
|
if(ctx->vg_roughe)
|
|
ptex->roughe*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_roughe);
|
|
if(ctx->vg_effector)
|
|
ptex->effector*=psys_interpolate_value_from_verts(ctx->dm,cpa_from,cpa_num,cpa_fuv,ctx->vg_effector);
|
|
}
|
|
static void do_child_modifiers(ParticleSimulationData *sim, ParticleTexture *ptex, ParticleKey *par, float *par_rot, ChildParticle *cpa, float *orco, float mat[4][4], ParticleKey *state, float t)
|
|
{
|
|
ParticleSettings *part = sim->psys->part;
|
|
int i = cpa - sim->psys->child;
|
|
int guided = 0;
|
|
|
|
float kink_freq = part->kink_freq;
|
|
float rough1 = part->rough1;
|
|
float rough2 = part->rough2;
|
|
float rough_end = part->rough_end;
|
|
|
|
if(ptex) {
|
|
kink_freq *= ptex->kink;
|
|
rough1 *= ptex->rough1;
|
|
rough2 *= ptex->rough2;
|
|
rough_end *= ptex->roughe;
|
|
}
|
|
|
|
if(part->flag & PART_CHILD_EFFECT)
|
|
/* state is safe to cast, since only co and vel are used */
|
|
guided = do_guides(sim->psys->effectors, (ParticleKey*)state, cpa->parent, t);
|
|
|
|
if(guided==0){
|
|
float clump = do_clump(state, par, t, part->clumpfac, part->clumppow, ptex ? ptex->clump : 1.f);
|
|
|
|
if(kink_freq != 0.f) {
|
|
float kink_amp = part->kink_amp * (1.f - part->kink_amp_clump * clump);
|
|
|
|
do_kink(state, par, par_rot, t, kink_freq, part->kink_shape,
|
|
kink_amp, part->kink_flat, part->kink, part->kink_axis,
|
|
sim->ob->obmat, sim->psys->part->childtype == PART_CHILD_FACES);
|
|
}
|
|
}
|
|
|
|
if(rough1 > 0.f)
|
|
do_rough(orco, mat, t, rough1, part->rough1_size, 0.0, state);
|
|
|
|
if(rough2 > 0.f)
|
|
do_rough(sim->psys->frand + ((i + 27) % (PSYS_FRAND_COUNT - 3)), mat, t, rough2, part->rough2_size, part->rough2_thres, state);
|
|
|
|
if(rough_end > 0.f)
|
|
do_rough_end(sim->psys->frand + ((i + 27) % (PSYS_FRAND_COUNT - 3)), mat, t, rough_end, part->rough_end_shape, state);
|
|
}
|
|
/* get's hair (or keyed) particles state at the "path time" specified in state->time */
|
|
void psys_get_particle_on_path(ParticleSimulationData *sim, int p, ParticleKey *state, int vel)
|
|
{
|
|
PARTICLE_PSMD;
|
|
ParticleSystem *psys = sim->psys;
|
|
ParticleSettings *part = sim->psys->part;
|
|
Material *ma = give_current_material(sim->ob, part->omat);
|
|
ParticleData *pa;
|
|
ChildParticle *cpa;
|
|
ParticleTexture ptex;
|
|
ParticleKey *par=0, keys[4], tstate;
|
|
ParticleThreadContext ctx; /* fake thread context for child modifiers */
|
|
ParticleInterpolationData pind;
|
|
|
|
float t;
|
|
float co[3], orco[3];
|
|
float hairmat[4][4];
|
|
int totpart = psys->totpart;
|
|
int totchild = psys->totchild;
|
|
short between = 0, edit = 0;
|
|
|
|
int keyed = part->phystype & PART_PHYS_KEYED && psys->flag & PSYS_KEYED;
|
|
int cached = !keyed && part->type != PART_HAIR;
|
|
|
|
float *cpa_fuv; int cpa_num; short cpa_from;
|
|
|
|
/* initialize keys to zero */
|
|
memset(keys, 0, 4*sizeof(ParticleKey));
|
|
|
|
t=state->time;
|
|
CLAMP(t, 0.0f, 1.0f);
|
|
|
|
if(p<totpart){
|
|
pa = psys->particles + p;
|
|
pind.keyed = keyed;
|
|
pind.cache = cached ? psys->pointcache : NULL;
|
|
pind.epoint = NULL;
|
|
pind.bspline = (psys->part->flag & PART_HAIR_BSPLINE);
|
|
/* pind.dm disabled in editmode means we dont get effectors taken into
|
|
* account when subdividing for instance */
|
|
pind.dm = psys_in_edit_mode(sim->scene, psys) ? NULL : psys->hair_out_dm;
|
|
init_particle_interpolation(sim->ob, psys, pa, &pind);
|
|
do_particle_interpolation(psys, p, pa, t, &pind, state);
|
|
|
|
if(pind.dm) {
|
|
mul_m4_v3(sim->ob->obmat, state->co);
|
|
mul_mat3_m4_v3(sim->ob->obmat, state->vel);
|
|
}
|
|
else if(!keyed && !cached && !(psys->flag & PSYS_GLOBAL_HAIR)) {
|
|
if((pa->flag & PARS_REKEY)==0) {
|
|
psys_mat_hair_to_global(sim->ob, sim->psmd->dm, part->from, pa, hairmat);
|
|
mul_m4_v3(hairmat, state->co);
|
|
mul_mat3_m4_v3(hairmat, state->vel);
|
|
|
|
if(sim->psys->effectors && (part->flag & PART_CHILD_GUIDE)==0) {
|
|
do_guides(sim->psys->effectors, state, p, state->time);
|
|
/* TODO: proper velocity handling */
|
|
}
|
|
|
|
if(psys->lattice && edit==0)
|
|
calc_latt_deform(psys->lattice, state->co,1.0f);
|
|
}
|
|
}
|
|
}
|
|
else if(totchild){
|
|
//invert_m4_m4(imat,ob->obmat);
|
|
|
|
cpa=psys->child+p-totpart;
|
|
|
|
if(state->time < 0.0f)
|
|
t = psys_get_child_time(psys, cpa, -state->time, NULL, NULL);
|
|
|
|
if(totchild && part->childtype==PART_CHILD_FACES){
|
|
/* part->parents could still be 0 so we can't test with totparent */
|
|
between=1;
|
|
}
|
|
if(between){
|
|
int w = 0;
|
|
float foffset;
|
|
|
|
/* get parent states */
|
|
while(w<4 && cpa->pa[w]>=0){
|
|
keys[w].time = state->time;
|
|
psys_get_particle_on_path(sim, cpa->pa[w], keys+w, 1);
|
|
w++;
|
|
}
|
|
|
|
/* get the original coordinates (orco) for texture usage */
|
|
cpa_num=cpa->num;
|
|
|
|
foffset= cpa->foffset;
|
|
cpa_fuv = cpa->fuv;
|
|
cpa_from = PART_FROM_FACE;
|
|
|
|
psys_particle_on_emitter(psmd,cpa_from,cpa_num,DMCACHE_ISCHILD,cpa->fuv,foffset,co,0,0,0,orco,0);
|
|
|
|
/* we need to save the actual root position of the child for positioning it accurately to the surface of the emitter */
|
|
//VECCOPY(cpa_1st,co);
|
|
|
|
//mul_m4_v3(ob->obmat,cpa_1st);
|
|
|
|
pa = psys->particles + cpa->parent;
|
|
|
|
if(part->type == PART_HAIR)
|
|
psys_mat_hair_to_global(sim->ob, sim->psmd->dm, psys->part->from, pa, hairmat);
|
|
else
|
|
unit_m4(hairmat);
|
|
|
|
pa=0;
|
|
}
|
|
else{
|
|
/* get the parent state */
|
|
keys->time = state->time;
|
|
psys_get_particle_on_path(sim, cpa->parent, keys,1);
|
|
|
|
/* get the original coordinates (orco) for texture usage */
|
|
pa=psys->particles+cpa->parent;
|
|
|
|
cpa_from=part->from;
|
|
cpa_num=pa->num;
|
|
cpa_fuv=pa->fuv;
|
|
|
|
|
|
|
|
if(part->type == PART_HAIR) {
|
|
psys_particle_on_emitter(psmd,cpa_from,cpa_num,DMCACHE_ISCHILD,cpa_fuv,pa->foffset,co,0,0,0,orco,0);
|
|
psys_mat_hair_to_global(sim->ob, sim->psmd->dm, psys->part->from, pa, hairmat);
|
|
}
|
|
else {
|
|
copy_v3_v3(orco, cpa->fuv);
|
|
unit_m4(hairmat);
|
|
}
|
|
}
|
|
|
|
/* correct child ipo timing */
|
|
#if 0 // XXX old animation system
|
|
if((part->flag&PART_ABS_TIME)==0 && part->ipo){
|
|
calc_ipo(part->ipo, 100.0f*t);
|
|
execute_ipo((ID *)part, part->ipo);
|
|
}
|
|
#endif // XXX old animation system
|
|
|
|
/* get different child parameters from textures & vgroups */
|
|
memset(&ctx, 0, sizeof(ParticleThreadContext));
|
|
ctx.sim = *sim;
|
|
ctx.dm = psmd->dm;
|
|
ctx.ma = ma;
|
|
/* TODO: assign vertex groups */
|
|
get_child_modifier_parameters(part, &ctx, cpa, cpa_from, cpa_num, cpa_fuv, orco, &ptex);
|
|
|
|
if(between){
|
|
int w=0;
|
|
|
|
state->co[0] = state->co[1] = state->co[2] = 0.0f;
|
|
state->vel[0] = state->vel[1] = state->vel[2] = 0.0f;
|
|
|
|
/* child position is the weighted sum of parent positions */
|
|
while(w<4 && cpa->pa[w]>=0){
|
|
state->co[0] += cpa->w[w] * keys[w].co[0];
|
|
state->co[1] += cpa->w[w] * keys[w].co[1];
|
|
state->co[2] += cpa->w[w] * keys[w].co[2];
|
|
|
|
state->vel[0] += cpa->w[w] * keys[w].vel[0];
|
|
state->vel[1] += cpa->w[w] * keys[w].vel[1];
|
|
state->vel[2] += cpa->w[w] * keys[w].vel[2];
|
|
w++;
|
|
}
|
|
/* apply offset for correct positioning */
|
|
//VECADD(state->co,state->co,cpa_1st);
|
|
}
|
|
else{
|
|
/* offset the child from the parent position */
|
|
offset_child(cpa, keys, keys->rot, state, part->childflat, part->childrad);
|
|
}
|
|
|
|
par = keys;
|
|
|
|
if(vel)
|
|
copy_particle_key(&tstate, state, 1);
|
|
|
|
/* apply different deformations to the child path */
|
|
do_child_modifiers(sim, &ptex, par, par->rot, cpa, orco, hairmat, state, t);
|
|
|
|
/* try to estimate correct velocity */
|
|
if(vel){
|
|
ParticleKey tstate;
|
|
float length = len_v3(state->vel);
|
|
|
|
if(t>=0.001f){
|
|
tstate.time=t-0.001f;
|
|
psys_get_particle_on_path(sim,p,&tstate,0);
|
|
VECSUB(state->vel,state->co,tstate.co);
|
|
normalize_v3(state->vel);
|
|
}
|
|
else{
|
|
tstate.time=t+0.001f;
|
|
psys_get_particle_on_path(sim,p,&tstate,0);
|
|
VECSUB(state->vel,tstate.co,state->co);
|
|
normalize_v3(state->vel);
|
|
}
|
|
|
|
mul_v3_fl(state->vel, length);
|
|
}
|
|
}
|
|
}
|
|
/* gets particle's state at a time, returns 1 if particle exists and can be seen and 0 if not */
|
|
int psys_get_particle_state(ParticleSimulationData *sim, int p, ParticleKey *state, int always){
|
|
ParticleSystem *psys = sim->psys;
|
|
ParticleSettings *part = psys->part;
|
|
ParticleData *pa = NULL;
|
|
ChildParticle *cpa = NULL;
|
|
float cfra;
|
|
int totpart = psys->totpart;
|
|
float timestep = psys_get_timestep(sim);
|
|
|
|
/* negative time means "use current time" */
|
|
cfra = state->time > 0 ? state->time : bsystem_time(sim->scene, 0, (float)sim->scene->r.cfra, 0.0);
|
|
|
|
if(p>=totpart){
|
|
if(!psys->totchild)
|
|
return 0;
|
|
|
|
if(part->childtype == PART_CHILD_FACES){
|
|
if(!(psys->flag & PSYS_KEYED))
|
|
return 0;
|
|
|
|
cpa = psys->child + p - totpart;
|
|
|
|
state->time = psys_get_child_time(psys, cpa, cfra, NULL, NULL);
|
|
|
|
if(!always)
|
|
if((state->time < 0.0f && !(part->flag & PART_UNBORN))
|
|
|| (state->time > 1.0f && !(part->flag & PART_DIED)))
|
|
return 0;
|
|
|
|
state->time= (cfra - (part->sta + (part->end - part->sta) * PSYS_FRAND(p + 23))) / (part->lifetime * PSYS_FRAND(p + 24));
|
|
|
|
psys_get_particle_on_path(sim, p, state,1);
|
|
return 1;
|
|
}
|
|
else {
|
|
cpa = sim->psys->child + p - totpart;
|
|
pa = sim->psys->particles + cpa->parent;
|
|
}
|
|
}
|
|
else {
|
|
pa = sim->psys->particles + p;
|
|
}
|
|
|
|
if(pa) {
|
|
if(!always)
|
|
if((cfra < pa->time && (part->flag & PART_UNBORN)==0)
|
|
|| (cfra > pa->dietime && (part->flag & PART_DIED)==0))
|
|
return 0;
|
|
|
|
cfra = MIN2(cfra, pa->dietime);
|
|
}
|
|
|
|
if(sim->psys->flag & PSYS_KEYED){
|
|
state->time= -cfra;
|
|
psys_get_particle_on_path(sim, p, state,1);
|
|
return 1;
|
|
}
|
|
else{
|
|
if(cpa){
|
|
float mat[4][4];
|
|
ParticleKey *key1;
|
|
float t = (cfra - pa->time) / pa->lifetime;
|
|
|
|
key1=&pa->state;
|
|
offset_child(cpa, key1, key1->rot, state, part->childflat, part->childrad);
|
|
|
|
CLAMP(t, 0.0f, 1.0f);
|
|
|
|
unit_m4(mat);
|
|
do_child_modifiers(sim, NULL, key1, key1->rot, cpa, cpa->fuv, mat, state, t);
|
|
|
|
if(psys->lattice)
|
|
calc_latt_deform(sim->psys->lattice, state->co,1.0f);
|
|
}
|
|
else{
|
|
if(pa->state.time==cfra || ELEM(part->phystype,PART_PHYS_NO,PART_PHYS_KEYED))
|
|
copy_particle_key(state, &pa->state, 1);
|
|
else if(pa->prev_state.time==cfra)
|
|
copy_particle_key(state, &pa->prev_state, 1);
|
|
else {
|
|
float dfra, frs_sec = sim->scene->r.frs_sec;
|
|
/* let's interpolate to try to be as accurate as possible */
|
|
if(pa->state.time + 2.f >= state->time && pa->prev_state.time - 2.f <= state->time) {
|
|
if(pa->prev_state.time >= pa->state.time || pa->prev_state.time < 0.f) {
|
|
/* prev_state is wrong so let's not use it, this can happen at frames 1, 0 or particle birth */
|
|
dfra = state->time - pa->state.time;
|
|
|
|
copy_particle_key(state, &pa->state, 1);
|
|
|
|
madd_v3_v3v3fl(state->co, state->co, state->vel, dfra/frs_sec);
|
|
}
|
|
else {
|
|
ParticleKey keys[4];
|
|
float keytime;
|
|
|
|
copy_particle_key(keys+1, &pa->prev_state, 1);
|
|
copy_particle_key(keys+2, &pa->state, 1);
|
|
|
|
dfra = keys[2].time - keys[1].time;
|
|
|
|
keytime = (state->time - keys[1].time) / dfra;
|
|
|
|
/* convert velocity to timestep size */
|
|
mul_v3_fl(keys[1].vel, dfra * timestep);
|
|
mul_v3_fl(keys[2].vel, dfra * timestep);
|
|
|
|
psys_interpolate_particle(-1, keys, keytime, state, 1);
|
|
|
|
/* convert back to real velocity */
|
|
mul_v3_fl(state->vel, 1.f / (dfra * timestep));
|
|
|
|
interp_v3_v3v3(state->ave, keys[1].ave, keys[2].ave, keytime);
|
|
interp_qt_qtqt(state->rot, keys[1].rot, keys[2].rot, keytime);
|
|
}
|
|
}
|
|
else if(pa->state.time + 1.f >= state->time && pa->state.time - 1.f <= state->time) {
|
|
/* linear interpolation using only pa->state */
|
|
|
|
dfra = state->time - pa->state.time;
|
|
|
|
copy_particle_key(state, &pa->state, 1);
|
|
|
|
madd_v3_v3v3fl(state->co, state->co, state->vel, dfra/frs_sec);
|
|
}
|
|
else {
|
|
/* extrapolating over big ranges is not accurate so let's just give something close to reasonable back */
|
|
copy_particle_key(state, &pa->state, 0);
|
|
}
|
|
}
|
|
|
|
if(sim->psys->lattice)
|
|
calc_latt_deform(sim->psys->lattice, state->co,1.0f);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
void psys_get_dupli_texture(ParticleSystem *psys, ParticleSettings *part, ParticleSystemModifierData *psmd, ParticleData *pa, ChildParticle *cpa, float *uv, float *orco)
|
|
{
|
|
MFace *mface;
|
|
MTFace *mtface;
|
|
float loc[3];
|
|
int num;
|
|
|
|
uv[0] = uv[1] = 0.f;
|
|
|
|
if(cpa) {
|
|
if(part->childtype == PART_CHILD_FACES) {
|
|
mtface= CustomData_get_layer(&psmd->dm->faceData, CD_MTFACE);
|
|
if(mtface) {
|
|
mface= psmd->dm->getFaceData(psmd->dm, cpa->num, CD_MFACE);
|
|
mtface += cpa->num;
|
|
psys_interpolate_uvs(mtface, mface->v4, cpa->fuv, uv);
|
|
}
|
|
|
|
psys_particle_on_emitter(psmd,PART_FROM_FACE,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,loc,0,0,0,orco,0);
|
|
return;
|
|
}
|
|
else {
|
|
pa = psys->particles + cpa->pa[0];
|
|
}
|
|
}
|
|
|
|
if(part->from == PART_FROM_FACE) {
|
|
mtface= CustomData_get_layer(&psmd->dm->faceData, CD_MTFACE);
|
|
num= pa->num_dmcache;
|
|
|
|
if(num == DMCACHE_NOTFOUND)
|
|
num= pa->num;
|
|
|
|
if (num >= psmd->dm->getNumFaces(psmd->dm)) {
|
|
/* happens when simplify is enabled
|
|
* gives invalid coords but would crash otherwise */
|
|
num= DMCACHE_NOTFOUND;
|
|
}
|
|
|
|
if(mtface && num != DMCACHE_NOTFOUND) {
|
|
mface= psmd->dm->getFaceData(psmd->dm, num, CD_MFACE);
|
|
mtface += num;
|
|
psys_interpolate_uvs(mtface, mface->v4, pa->fuv, uv);
|
|
}
|
|
}
|
|
|
|
psys_particle_on_emitter(psmd,part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,loc,0,0,0,orco,0);
|
|
}
|
|
|
|
void psys_get_dupli_path_transform(ParticleSimulationData *sim, ParticleData *pa, ChildParticle *cpa, ParticleCacheKey *cache, float mat[][4], float *scale)
|
|
{
|
|
Object *ob = sim->ob;
|
|
ParticleSystem *psys = sim->psys;
|
|
ParticleSystemModifierData *psmd = sim->psmd;
|
|
float loc[3], nor[3], vec[3], side[3], len, obrotmat[4][4], qmat[4][4];
|
|
float xvec[3] = {-1.0, 0.0, 0.0}, q[4], nmat[3][3];
|
|
|
|
sub_v3_v3v3(vec, (cache+cache->steps)->co, cache->co);
|
|
len= normalize_v3(vec);
|
|
|
|
if(psys->part->rotmode) {
|
|
if(pa == NULL)
|
|
pa= psys->particles+cpa->pa[0];
|
|
|
|
vec_to_quat( q,xvec, ob->trackflag, ob->upflag);
|
|
quat_to_mat4( obrotmat,q);
|
|
obrotmat[3][3]= 1.0f;
|
|
|
|
quat_to_mat4( qmat,pa->state.rot);
|
|
mul_m4_m4m4(mat, obrotmat, qmat);
|
|
}
|
|
else {
|
|
if(pa == NULL && psys->part->childflat != PART_CHILD_FACES)
|
|
pa = psys->particles + cpa->pa[0];
|
|
|
|
if(pa)
|
|
psys_particle_on_emitter(psmd,sim->psys->part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,loc,nor,0,0,0,0);
|
|
else
|
|
psys_particle_on_emitter(psmd,PART_FROM_FACE,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,loc,nor,0,0,0,0);
|
|
|
|
copy_m3_m4(nmat, ob->imat);
|
|
transpose_m3(nmat);
|
|
mul_m3_v3(nmat, nor);
|
|
|
|
/* make sure that we get a proper side vector */
|
|
if(fabs(dot_v3v3(nor,vec))>0.999999) {
|
|
if(fabs(dot_v3v3(nor,xvec))>0.999999) {
|
|
nor[0] = 0.0f;
|
|
nor[1] = 1.0f;
|
|
nor[2] = 0.0f;
|
|
}
|
|
else {
|
|
nor[0] = 1.0f;
|
|
nor[1] = 0.0f;
|
|
nor[2] = 0.0f;
|
|
}
|
|
}
|
|
cross_v3_v3v3(side, nor, vec);
|
|
normalize_v3(side);
|
|
cross_v3_v3v3(nor, vec, side);
|
|
|
|
unit_m4(mat);
|
|
VECCOPY(mat[0], vec);
|
|
VECCOPY(mat[1], side);
|
|
VECCOPY(mat[2], nor);
|
|
}
|
|
|
|
*scale= len;
|
|
}
|
|
|
|
void psys_make_billboard(ParticleBillboardData *bb, float xvec[3], float yvec[3], float zvec[3], float center[3])
|
|
{
|
|
float onevec[3] = {0.0f,0.0f,0.0f}, tvec[3], tvec2[3];
|
|
|
|
xvec[0] = 1.0f; xvec[1] = 0.0f; xvec[2] = 0.0f;
|
|
yvec[0] = 0.0f; yvec[1] = 1.0f; yvec[2] = 0.0f;
|
|
|
|
/* can happen with bad pointcache or physics calculation
|
|
* since this becomes geometry, nan's and inf's crash raytrace code.
|
|
* better not allow this. */
|
|
if( !finite(bb->vec[0]) || !finite(bb->vec[1]) || !finite(bb->vec[2]) ||
|
|
!finite(bb->vel[0]) || !finite(bb->vel[1]) || !finite(bb->vel[2]) )
|
|
{
|
|
zero_v3(bb->vec);
|
|
zero_v3(bb->vel);
|
|
|
|
zero_v3(xvec);
|
|
zero_v3(yvec);
|
|
zero_v3(zvec);
|
|
zero_v3(center);
|
|
|
|
return;
|
|
}
|
|
|
|
if(bb->align < PART_BB_VIEW)
|
|
onevec[bb->align]=1.0f;
|
|
|
|
if(bb->lock && (bb->align == PART_BB_VIEW)) {
|
|
normalize_v3_v3(xvec, bb->ob->obmat[0]);
|
|
normalize_v3_v3(yvec, bb->ob->obmat[1]);
|
|
normalize_v3_v3(zvec, bb->ob->obmat[2]);
|
|
}
|
|
else if(bb->align == PART_BB_VEL) {
|
|
float temp[3];
|
|
|
|
normalize_v3_v3(temp, bb->vel);
|
|
|
|
VECSUB(zvec, bb->ob->obmat[3], bb->vec);
|
|
|
|
if(bb->lock) {
|
|
float fac = -dot_v3v3(zvec, temp);
|
|
|
|
VECADDFAC(zvec, zvec, temp, fac);
|
|
}
|
|
normalize_v3(zvec);
|
|
|
|
cross_v3_v3v3(xvec,temp,zvec);
|
|
normalize_v3(xvec);
|
|
|
|
cross_v3_v3v3(yvec,zvec,xvec);
|
|
}
|
|
else {
|
|
VECSUB(zvec, bb->ob->obmat[3], bb->vec);
|
|
if(bb->lock)
|
|
zvec[bb->align] = 0.0f;
|
|
normalize_v3(zvec);
|
|
|
|
if(bb->align < PART_BB_VIEW)
|
|
cross_v3_v3v3(xvec, onevec, zvec);
|
|
else
|
|
cross_v3_v3v3(xvec, bb->ob->obmat[1], zvec);
|
|
normalize_v3(xvec);
|
|
|
|
cross_v3_v3v3(yvec,zvec,xvec);
|
|
}
|
|
|
|
VECCOPY(tvec, xvec);
|
|
VECCOPY(tvec2, yvec);
|
|
|
|
mul_v3_fl(xvec, cos(bb->tilt * (float)M_PI));
|
|
mul_v3_fl(tvec2, sin(bb->tilt * (float)M_PI));
|
|
VECADD(xvec, xvec, tvec2);
|
|
|
|
mul_v3_fl(yvec, cos(bb->tilt * (float)M_PI));
|
|
mul_v3_fl(tvec, -sin(bb->tilt * (float)M_PI));
|
|
VECADD(yvec, yvec, tvec);
|
|
|
|
mul_v3_fl(xvec, bb->size[0]);
|
|
mul_v3_fl(yvec, bb->size[1]);
|
|
|
|
VECADDFAC(center, bb->vec, xvec, bb->offset[0]);
|
|
VECADDFAC(center, center, yvec, bb->offset[1]);
|
|
}
|
|
|
|
|
|
void psys_apply_hair_lattice(Scene *scene, Object *ob, ParticleSystem *psys) {
|
|
ParticleSimulationData sim= {0};
|
|
sim.scene= scene;
|
|
sim.ob= ob;
|
|
sim.psys= psys;
|
|
sim.psmd= psys_get_modifier(ob, psys);
|
|
|
|
psys->lattice = psys_get_lattice(&sim);
|
|
|
|
if(psys->lattice) {
|
|
ParticleData *pa = psys->particles;
|
|
HairKey *hkey;
|
|
int p, h;
|
|
float hairmat[4][4], imat[4][4];
|
|
|
|
for(p=0; p<psys->totpart; p++, pa++) {
|
|
psys_mat_hair_to_global(sim.ob, sim.psmd->dm, psys->part->from, pa, hairmat);
|
|
invert_m4_m4(imat, hairmat);
|
|
|
|
hkey = pa->hair;
|
|
for(h=0; h<pa->totkey; h++, hkey++) {
|
|
mul_m4_v3(hairmat, hkey->co);
|
|
calc_latt_deform(psys->lattice, hkey->co, 1.0f);
|
|
mul_m4_v3(imat, hkey->co);
|
|
}
|
|
}
|
|
|
|
end_latt_deform(psys->lattice);
|
|
psys->lattice= NULL;
|
|
|
|
/* protect the applied shape */
|
|
psys->flag |= PSYS_EDITED;
|
|
}
|
|
}
|