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Diffstat (limited to 'source/blender/blenkernel/intern/particle.c')
| -rw-r--r-- | source/blender/blenkernel/intern/particle.c | 4304 |
1 files changed, 4304 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c new file mode 100644 index 00000000000..1ea27558545 --- /dev/null +++ b/source/blender/blenkernel/intern/particle.c @@ -0,0 +1,4304 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2007 by Janne Karhu. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/blenkernel/intern/particle.c + * \ingroup bke + */ + + +#include <stdlib.h> +#include <math.h> +#include <string.h> + +#include "MEM_guardedalloc.h" + +#include "DNA_curve_types.h" +#include "DNA_group_types.h" +#include "DNA_key_types.h" +#include "DNA_material_types.h" +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" +#include "DNA_particle_types.h" +#include "DNA_smoke_types.h" +#include "DNA_scene_types.h" +#include "DNA_dynamicpaint_types.h" + +#include "BLI_blenlib.h" +#include "BLI_noise.h" +#include "BLI_math.h" +#include "BLI_utildefines.h" +#include "BLI_kdtree.h" +#include "BLI_rand.h" +#include "BLI_task.h" +#include "BLI_threads.h" +#include "BLI_linklist.h" + +#include "BLT_translation.h" + +#include "BKE_anim.h" +#include "BKE_animsys.h" + +#include "BKE_boids.h" +#include "BKE_cloth.h" +#include "BKE_colortools.h" +#include "BKE_effect.h" +#include "BKE_global.h" +#include "BKE_group.h" +#include "BKE_main.h" +#include "BKE_lattice.h" + +#include "BKE_displist.h" +#include "BKE_particle.h" +#include "BKE_material.h" +#include "BKE_key.h" +#include "BKE_library.h" +#include "BKE_library_query.h" +#include "BKE_library_remap.h" +#include "BKE_depsgraph.h" +#include "BKE_modifier.h" +#include "BKE_mesh.h" +#include "BKE_cdderivedmesh.h" +#include "BKE_pointcache.h" +#include "BKE_scene.h" +#include "BKE_deform.h" + +#include "RE_render_ext.h" + +unsigned int PSYS_FRAND_SEED_OFFSET[PSYS_FRAND_COUNT]; +unsigned int PSYS_FRAND_SEED_MULTIPLIER[PSYS_FRAND_COUNT]; +float PSYS_FRAND_BASE[PSYS_FRAND_COUNT]; + +void psys_init_rng(void) +{ + int i; + BLI_srandom(5831); /* arbitrary */ + for (i = 0; i < PSYS_FRAND_COUNT; ++i) { + PSYS_FRAND_BASE[i] = BLI_frand(); + PSYS_FRAND_SEED_OFFSET[i] = (unsigned int)BLI_rand(); + PSYS_FRAND_SEED_MULTIPLIER[i] = (unsigned int)BLI_rand(); + } +} + +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); +static void get_cpa_texture(DerivedMesh *dm, ParticleSystem *psys, ParticleSettings *part, ParticleData *par, + int child_index, int face_index, const float fw[4], float *orco, ParticleTexture *ptex, int event, float cfra); +extern void do_child_modifiers(ParticleThreadContext *ctx, ParticleSimulationData *sim, + ParticleTexture *ptex, const float par_co[3], const float par_vel[3], const float par_rot[4], const float par_orco[3], + ChildParticle *cpa, const float orco[3], float mat[4][4], ParticleKey *state, float t); + +/* few helpers for countall etc. */ +int count_particles(ParticleSystem *psys) +{ + ParticleSettings *part = psys->part; + PARTICLE_P; + int tot = 0; + + LOOP_SHOWN_PARTICLES { + if (pa->alive == PARS_UNBORN && (part->flag & PART_UNBORN) == 0) {} + else if (pa->alive == PARS_DEAD && (part->flag & PART_DIED) == 0) {} + else tot++; + } + return tot; +} +int count_particles_mod(ParticleSystem *psys, int totgr, int cur) +{ + ParticleSettings *part = psys->part; + PARTICLE_P; + int tot = 0; + + LOOP_SHOWN_PARTICLES { + if (pa->alive == PARS_UNBORN && (part->flag & PART_UNBORN) == 0) {} + else if (pa->alive == PARS_DEAD && (part->flag & PART_DIED) == 0) {} + else if (p % totgr == cur) tot++; + } + return tot; +} +/* we allocate path cache memory in chunks instead of a big contiguous + * chunk, windows' memory allocater fails to find big blocks of memory often */ + +#define PATH_CACHE_BUF_SIZE 1024 + +static ParticleCacheKey *pcache_key_segment_endpoint_safe(ParticleCacheKey *key) +{ + return (key->segments > 0) ? (key + (key->segments - 1)) : key; +} + +static ParticleCacheKey **psys_alloc_path_cache_buffers(ListBase *bufs, int tot, int totkeys) +{ + LinkData *buf; + ParticleCacheKey **cache; + int i, totkey, totbufkey; + + tot = MAX2(tot, 1); + totkey = 0; + cache = MEM_callocN(tot * sizeof(void *), "PathCacheArray"); + + while (totkey < tot) { + totbufkey = MIN2(tot - totkey, PATH_CACHE_BUF_SIZE); + buf = MEM_callocN(sizeof(LinkData), "PathCacheLinkData"); + buf->data = MEM_callocN(sizeof(ParticleCacheKey) * totbufkey * totkeys, "ParticleCacheKey"); + + for (i = 0; i < totbufkey; i++) + cache[totkey + i] = ((ParticleCacheKey *)buf->data) + i * totkeys; + + totkey += totbufkey; + BLI_addtail(bufs, buf); + } + + return cache; +} + +static void psys_free_path_cache_buffers(ParticleCacheKey **cache, ListBase *bufs) +{ + LinkData *buf; + + if (cache) + MEM_freeN(cache); + + for (buf = bufs->first; buf; buf = buf->next) + MEM_freeN(buf->data); + BLI_freelistN(bufs); +} + +/************************************************/ +/* Getting stuff */ +/************************************************/ +/* get object's active particle system safely */ +ParticleSystem *psys_get_current(Object *ob) +{ + ParticleSystem *psys; + if (ob == NULL) return NULL; + + for (psys = ob->particlesystem.first; psys; psys = psys->next) { + if (psys->flag & PSYS_CURRENT) + return psys; + } + + return NULL; +} +short psys_get_current_num(Object *ob) +{ + ParticleSystem *psys; + short i; + + if (ob == NULL) return 0; + + for (psys = ob->particlesystem.first, i = 0; psys; psys = psys->next, i++) + if (psys->flag & PSYS_CURRENT) + return i; + + return i; +} +void psys_set_current_num(Object *ob, int index) +{ + ParticleSystem *psys; + short i; + + if (ob == NULL) return; + + for (psys = ob->particlesystem.first, i = 0; psys; psys = psys->next, i++) { + if (i == index) + psys->flag |= PSYS_CURRENT; + else + psys->flag &= ~PSYS_CURRENT; + } +} + +#if 0 /* UNUSED */ +Object *psys_find_object(Scene *scene, ParticleSystem *psys) +{ + Base *base; + ParticleSystem *tpsys; + + for (base = scene->base.first; base; base = base->next) { + for (tpsys = base->object->particlesystem.first; psys; psys = psys->next) { + if (tpsys == psys) + return base->object; + } + } + + return NULL; +} +#endif + +struct LatticeDeformData *psys_create_lattice_deform_data(ParticleSimulationData *sim) +{ + struct LatticeDeformData *lattice_deform_data = NULL; + + if (psys_in_edit_mode(sim->scene, sim->psys) == 0) { + Object *lattice = NULL; + ModifierData *md = (ModifierData *)psys_get_modifier(sim->ob, sim->psys); + + for (; md; md = md->next) { + if (md->type == eModifierType_Lattice) { + LatticeModifierData *lmd = (LatticeModifierData *)md; + lattice = lmd->object; + break; + } + } + if (lattice) + lattice_deform_data = init_latt_deform(lattice, NULL); + } + + return lattice_deform_data; +} +void psys_disable_all(Object *ob) +{ + ParticleSystem *psys = ob->particlesystem.first; + + for (; psys; psys = psys->next) + psys->flag |= PSYS_DISABLED; +} +void psys_enable_all(Object *ob) +{ + ParticleSystem *psys = ob->particlesystem.first; + + for (; psys; psys = psys->next) + psys->flag &= ~PSYS_DISABLED; +} +bool psys_in_edit_mode(Scene *scene, ParticleSystem *psys) +{ + 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); +} +bool psys_check_enabled(Object *ob, ParticleSystem *psys, const bool use_render_params) +{ + ParticleSystemModifierData *psmd; + + if (psys->flag & PSYS_DISABLED || psys->flag & PSYS_DELETE || !psys->part) + return 0; + + psmd = psys_get_modifier(ob, psys); + if (psys->renderdata || use_render_params) { + if (!(psmd->modifier.mode & eModifierMode_Render)) + return 0; + } + else if (!(psmd->modifier.mode & eModifierMode_Realtime)) + return 0; + + return 1; +} + +bool psys_check_edited(ParticleSystem *psys) +{ + if (psys->part && psys->part->type == PART_HAIR) + return (psys->flag & PSYS_EDITED || (psys->edit && psys->edit->edited)); + else + return (psys->pointcache->edit && psys->pointcache->edit->edited); +} + +void psys_check_group_weights(ParticleSettings *part) +{ + ParticleDupliWeight *dw, *tdw; + GroupObject *go; + int current = 0; + + if (part->ren_as == PART_DRAW_GR && part->dup_group && part->dup_group->gobject.first) { + /* First try to find NULL objects from their index, + * and remove all weights that don't have an object in the group. */ + dw = part->dupliweights.first; + while (dw) { + if (dw->ob == NULL || !BKE_group_object_exists(part->dup_group, dw->ob)) { + go = (GroupObject *)BLI_findlink(&part->dup_group->gobject, dw->index); + if (go) { + dw->ob = go->ob; + } + else { + tdw = dw->next; + BLI_freelinkN(&part->dupliweights, dw); + dw = tdw; + } + } + else { + dw = dw->next; + } + } + + /* then add objects in the group to new list */ + go = part->dup_group->gobject.first; + while (go) { + dw = part->dupliweights.first; + while (dw && dw->ob != go->ob) + dw = dw->next; + + if (!dw) { + dw = MEM_callocN(sizeof(ParticleDupliWeight), "ParticleDupliWeight"); + dw->ob = go->ob; + dw->count = 1; + BLI_addtail(&part->dupliweights, dw); + } + + go = go->next; + } + + dw = part->dupliweights.first; + for (; dw; dw = dw->next) { + if (dw->flag & PART_DUPLIW_CURRENT) { + current = 1; + break; + } + } + + if (!current) { + dw = part->dupliweights.first; + if (dw) + dw->flag |= PART_DUPLIW_CURRENT; + } + } + else { + BLI_freelistN(&part->dupliweights); + } +} +int psys_uses_gravity(ParticleSimulationData *sim) +{ + return sim->scene->physics_settings.flag & PHYS_GLOBAL_GRAVITY && sim->psys->part && sim->psys->part->effector_weights->global_gravity != 0.0f; +} +/************************************************/ +/* Freeing stuff */ +/************************************************/ +static void fluid_free_settings(SPHFluidSettings *fluid) +{ + if (fluid) + MEM_freeN(fluid); +} + +/** Free (or release) any data used by this particle settings (does not free the partsett itself). */ +void BKE_particlesettings_free(ParticleSettings *part) +{ + int a; + + BKE_animdata_free((ID *)part, false); + + for (a = 0; a < MAX_MTEX; a++) { + MEM_SAFE_FREE(part->mtex[a]); + } + + if (part->clumpcurve) + curvemapping_free(part->clumpcurve); + if (part->roughcurve) + curvemapping_free(part->roughcurve); + + free_partdeflect(part->pd); + free_partdeflect(part->pd2); + + MEM_SAFE_FREE(part->effector_weights); + + BLI_freelistN(&part->dupliweights); + + boid_free_settings(part->boids); + fluid_free_settings(part->fluid); +} + +void free_hair(Object *UNUSED(ob), ParticleSystem *psys, int dynamics) +{ + PARTICLE_P; + + LOOP_PARTICLES { + if (pa->hair) + MEM_freeN(pa->hair); + pa->hair = NULL; + pa->totkey = 0; + } + + psys->flag &= ~PSYS_HAIR_DONE; + + if (psys->clmd) { + if (dynamics) { + BKE_ptcache_free_list(&psys->ptcaches); + psys->pointcache = NULL; + + modifier_free((ModifierData *)psys->clmd); + + psys->clmd = NULL; + psys->pointcache = BKE_ptcache_add(&psys->ptcaches); + } + else { + cloth_free_modifier(psys->clmd); + } + } + + if (psys->hair_in_dm) + psys->hair_in_dm->release(psys->hair_in_dm); + psys->hair_in_dm = NULL; + + if (psys->hair_out_dm) + psys->hair_out_dm->release(psys->hair_out_dm); + psys->hair_out_dm = NULL; +} +void free_keyed_keys(ParticleSystem *psys) +{ + PARTICLE_P; + + if (psys->part->type == PART_HAIR) + return; + + if (psys->particles && psys->particles->keys) { + MEM_freeN(psys->particles->keys); + + LOOP_PARTICLES { + if (pa->keys) { + pa->keys = NULL; + pa->totkey = 0; + } + } + } +} +static void free_child_path_cache(ParticleSystem *psys) +{ + psys_free_path_cache_buffers(psys->childcache, &psys->childcachebufs); + psys->childcache = NULL; + psys->totchildcache = 0; +} +void psys_free_path_cache(ParticleSystem *psys, PTCacheEdit *edit) +{ + if (edit) { + psys_free_path_cache_buffers(edit->pathcache, &edit->pathcachebufs); + edit->pathcache = NULL; + edit->totcached = 0; + } + if (psys) { + psys_free_path_cache_buffers(psys->pathcache, &psys->pathcachebufs); + psys->pathcache = NULL; + psys->totcached = 0; + + free_child_path_cache(psys); + } +} +void psys_free_children(ParticleSystem *psys) +{ + if (psys->child) { + MEM_freeN(psys->child); + psys->child = NULL; + psys->totchild = 0; + } + + free_child_path_cache(psys); +} +void psys_free_particles(ParticleSystem *psys) +{ + PARTICLE_P; + + if (psys->particles) { + /* Even though psys->part should never be NULL, this can happen as an exception during deletion. + * See ID_REMAP_SKIP/FORCE/FLAG_NEVER_NULL_USAGE in BKE_library_remap. */ + if (psys->part && psys->part->type == PART_HAIR) { + LOOP_PARTICLES { + if (pa->hair) + MEM_freeN(pa->hair); + } + } + + if (psys->particles->keys) + MEM_freeN(psys->particles->keys); + + if (psys->particles->boid) + MEM_freeN(psys->particles->boid); + + MEM_freeN(psys->particles); + psys->particles = NULL; + psys->totpart = 0; + } +} +void psys_free_pdd(ParticleSystem *psys) +{ + if (psys->pdd) { + if (psys->pdd->cdata) + MEM_freeN(psys->pdd->cdata); + psys->pdd->cdata = NULL; + + if (psys->pdd->vdata) + MEM_freeN(psys->pdd->vdata); + psys->pdd->vdata = NULL; + + if (psys->pdd->ndata) + MEM_freeN(psys->pdd->ndata); + psys->pdd->ndata = NULL; + + if (psys->pdd->vedata) + MEM_freeN(psys->pdd->vedata); + psys->pdd->vedata = NULL; + + 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; + + 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->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 */ + +void psys_render_set(Object *ob, ParticleSystem *psys, float viewmat[4][4], float winmat[4][4], int winx, int winy, int timeoffset) +{ + ParticleRenderData *data; + ParticleSystemModifierData *psmd = psys_get_modifier(ob, psys); + + 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_final) + data->dm = CDDM_copy(psmd->dm_final); + 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; + BLI_listbase_clear(&psys->pathcachebufs); + BLI_listbase_clear(&psys->childcachebufs); + + copy_m4_m4(data->winmat, winmat); + mul_m4_m4m4(data->viewmat, viewmat, ob->obmat); + mul_m4_m4m4(data->mat, winmat, data->viewmat); + 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); + float render_disp = psys_get_current_display_percentage(psys); + float disp; + + data = psys->renderdata; + if (!data) + return; + + if (data->elems) + MEM_freeN(data->elems); + + if (psmd->dm_final) { + psmd->dm_final->needsFree = 1; + psmd->dm_final->release(psmd->dm_final); + } + if (psmd->dm_deformed) { + psmd->dm_deformed->needsFree = 1; + psmd->dm_deformed->release(psmd->dm_deformed); + psmd->dm_deformed = NULL; + } + + 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_final = data->dm; + psmd->totdmvert = data->totdmvert; + psmd->totdmedge = data->totdmedge; + psmd->totdmface = data->totdmface; + psmd->flag &= ~eParticleSystemFlag_psys_updated; + + if (psmd->dm_final) { + if (!psmd->dm_final->deformedOnly) { + if (ob->derivedDeform) { + psmd->dm_deformed = CDDM_copy(ob->derivedDeform); + } + else { + psmd->dm_deformed = CDDM_from_mesh((Mesh *)ob->data); + } + DM_ensure_tessface(psmd->dm_deformed); + } + psys_calc_dmcache(ob, psmd->dm_final, psmd->dm_deformed, psys); + } + + MEM_freeN(data); + psys->renderdata = NULL; + + /* restore particle display percentage */ + disp = psys_get_current_display_percentage(psys); + + if (disp != render_disp) { + /* Hair can and has to be recalculated if everything isn't displayed. */ + if (psys->part->type == PART_HAIR) { + psys->recalc |= PSYS_RECALC_RESET; + } + else { + PARTICLE_P; + + LOOP_PARTICLES { + if (psys_frand(psys, p) > disp) + pa->flag |= PARS_NO_DISP; + else + pa->flag &= ~PARS_NO_DISP; + } + } + } +} + +bool 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 false; + + data = psys->renderdata; + if (!data->do_simplify) + return false; + b = (data->index_mf_to_mpoly) ? DM_origindex_mface_mpoly(data->index_mf_to_mpoly, data->index_mp_to_orig, cpa->num) : cpa->num; + if (b == ORIGINDEX_NONE) { + return false; + } + + 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, const float w[4], 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, bool 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); + sub_v3_v3v3(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); + sub_v3_v3v3(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); + if (index2 < 0) { + return; + } + + 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); + if (index2 < 0) { + return; + } + 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) +{ + copy_v3_v3(key->co, ekey->co); + if (ekey->vel) { + copy_v3_v3(key->vel, ekey->vel); + } + key->time = *(ekey->time); +} +static void hair_to_particle(ParticleKey *key, HairKey *hkey) +{ + copy_v3_v3(key->co, hkey->co); + key->time = hkey->time; +} + +static void mvert_to_particle(ParticleKey *key, MVert *mvert, HairKey *hkey) +{ + copy_v3_v3(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); +} + +static void interpolate_pathcache(ParticleCacheKey *first, float t, ParticleCacheKey *result) +{ + int i = 0; + ParticleCacheKey *cur = first; + + /* scale the requested time to fit the entire path even if the path is cut early */ + t *= (first + first->segments)->time; + + while (i < first->segments && cur->time < t) + cur++; + + if (cur->time == t) + *result = *cur; + else { + float dt = (t - (cur - 1)->time) / (cur->time - (cur - 1)->time); + interp_v3_v3v3(result->co, (cur - 1)->co, cur->co, dt); + interp_v3_v3v3(result->vel, (cur - 1)->vel, cur->vel, dt); + interp_qt_qtqt(result->rot, (cur - 1)->rot, cur->rot, dt); + result->time = t; + } + + /* first is actual base rotation, others are incremental from first */ + if (cur == first || cur - 1 == first) + copy_qt_qt(result->rot, first->rot); + else + mul_qt_qtqt(result->rot, first->rot, result->rot); +} + +/************************************************/ +/* 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[4], float vec[3], float nor[3], float utan[3], float vtan[3], + float orco[3], float ornor[3]) +{ + 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 { + copy_v3_v3(orco, vec); + if (ornor && nor) + copy_v3_v3(ornor, nor); + } + } +} +void psys_interpolate_uvs(const MTFace *tface, int quad, const float w[4], float uvco[2]) +{ + 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(const MCol *mcol, int quad, const float w[4], MCol *mc) +{ + const char *cp1, *cp2, *cp3, *cp4; + char *cp; + + cp = (char *)mc; + cp1 = (const char *)&mcol[0]; + cp2 = (const char *)&mcol[1]; + cp3 = (const 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, const float fw[4], const 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->getTessFaceData(dm, index, CD_MFACE); + return interpolate_particle_value(values[mf->v1], values[mf->v2], values[mf->v3], values[mf->v4], fw, mf->v4); + } + + } + return 0.0f; +} + +/* conversion of pa->fw to origspace layer coordinates */ +static void psys_w_to_origspace(const float w[4], float uv[2]) +{ + 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, const float w[4], float neww[4]) +{ + 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 final derived mesh tessface for a particle, from its original tessface index. + * This is slow and can be optimized but only for many lookups. + * + * \param dm_final final DM, it may not have the same topology as original mesh. + * \param dm_deformed deformed-only DM, it has the exact same topology as original mesh. + * \param findex_orig the input tessface index. + * \param fw face weights (position of the particle inside the \a findex_orig tessface). + * \param poly_nodes may be NULL, otherwise an array of linked list, one for each final DM polygon, containing all + * its tessfaces indices. + * \return the DM tessface index. + */ +int psys_particle_dm_face_lookup( + DerivedMesh *dm_final, DerivedMesh *dm_deformed, + int findex_orig, const float fw[4], struct LinkNode **poly_nodes) +{ + MFace *mtessface_final; + OrigSpaceFace *osface_final; + int pindex_orig; + float uv[2], (*faceuv)[2]; + + const int *index_mf_to_mpoly_deformed = NULL; + const int *index_mf_to_mpoly = NULL; + const int *index_mp_to_orig = NULL; + + const int totface_final = dm_final->getNumTessFaces(dm_final); + const int totface_deformed = dm_deformed ? dm_deformed->getNumTessFaces(dm_deformed) : totface_final; + + if (ELEM(0, totface_final, totface_deformed)) { + return DMCACHE_NOTFOUND; + } + + index_mf_to_mpoly = dm_final->getTessFaceDataArray(dm_final, CD_ORIGINDEX); + index_mp_to_orig = dm_final->getPolyDataArray(dm_final, CD_ORIGINDEX); + BLI_assert(index_mf_to_mpoly); + + if (dm_deformed) { + index_mf_to_mpoly_deformed = dm_deformed->getTessFaceDataArray(dm_deformed, CD_ORIGINDEX); + } + else { + BLI_assert(dm_final->deformedOnly); + index_mf_to_mpoly_deformed = index_mf_to_mpoly; + } + BLI_assert(index_mf_to_mpoly_deformed); + + pindex_orig = index_mf_to_mpoly_deformed[findex_orig]; + + if (dm_deformed == NULL) { + dm_deformed = dm_final; + } + + index_mf_to_mpoly_deformed = NULL; + + mtessface_final = dm_final->getTessFaceArray(dm_final); + osface_final = dm_final->getTessFaceDataArray(dm_final, CD_ORIGSPACE); + + if (osface_final == NULL) { + /* Assume we don't need osface_final data, and we get a direct 1-1 mapping... */ + if (findex_orig < totface_final) { + //printf("\tNO CD_ORIGSPACE, assuming not needed\n"); + return findex_orig; + } + else { + printf("\tNO CD_ORIGSPACE, error out of range\n"); + return DMCACHE_NOTFOUND; + } + } + else if (findex_orig >= dm_deformed->getNumTessFaces(dm_deformed)) { + return DMCACHE_NOTFOUND; /* index not in the original mesh */ + } + + psys_w_to_origspace(fw, uv); + + if (poly_nodes) { + /* we can have a restricted linked list of faces to check, faster! */ + LinkNode *tessface_node = poly_nodes[pindex_orig]; + + for (; tessface_node; tessface_node = tessface_node->next) { + int findex_dst = GET_INT_FROM_POINTER(tessface_node->link); + faceuv = osface_final[findex_dst].uv; + + /* check that this intersects - Its possible this misses :/ - + * could also check its not between */ + if (mtessface_final[findex_dst].v4) { + if (isect_point_quad_v2(uv, faceuv[0], faceuv[1], faceuv[2], faceuv[3])) { + return findex_dst; + } + } + else if (isect_point_tri_v2(uv, faceuv[0], faceuv[1], faceuv[2])) { + return findex_dst; + } + } + } + else { /* if we have no node, try every face */ + for (int findex_dst = 0; findex_dst < totface_final; findex_dst++) { + /* If current tessface from 'final' DM and orig tessface (given by index) map to the same orig poly... */ + if (DM_origindex_mface_mpoly(index_mf_to_mpoly, index_mp_to_orig, findex_dst) == pindex_orig) { + faceuv = osface_final[findex_dst].uv; + + /* check that this intersects - Its possible this misses :/ - + * could also check its not between */ + if (mtessface_final[findex_dst].v4) { + if (isect_point_quad_v2(uv, faceuv[0], faceuv[1], faceuv[2], faceuv[3])) { + return findex_dst; + } + } + else if (isect_point_tri_v2(uv, faceuv[0], faceuv[1], faceuv[2])) { + return findex_dst; + } + } + } + } + + return DMCACHE_NOTFOUND; +} + +static int psys_map_index_on_dm(DerivedMesh *dm, int from, int index, int index_dmcache, const float fw[4], float UNUSED(foffset), int *mapindex, float mapfw[4]) +{ + if (index < 0) + return 0; + + if (dm->deformedOnly || index_dmcache == DMCACHE_ISCHILD) { + /* for meshes that are either only deformed 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->getNumTessFaces(dm)) + return 0; + + *mapindex = index; + copy_v4_v4(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->getNumTessFaces(dm)) + return 0; + + *mapindex = i; + + /* modify the original weights to become + * weights for the derived mesh face */ + osface = dm->getTessFaceDataArray(dm, CD_ORIGSPACE); + mface = dm->getTessFaceData(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_final, int from, int index, int index_dmcache, + const float fw[4], float foffset, float vec[3], float nor[3], float utan[3], float vtan[3], + float orco[3], float ornor[3]) +{ + float tmpnor[3], mapfw[4]; + float (*orcodata)[3]; + int mapindex; + + if (!psys_map_index_on_dm(dm_final, 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_final->getVertDataArray(dm_final, CD_ORCO); + + if (from == PART_FROM_VERT) { + dm_final->getVertCo(dm_final, mapindex, vec); + + if (nor) { + dm_final->getVertNo(dm_final, mapindex, nor); + normalize_v3(nor); + } + + if (orco) { + if (orcodata) { + copy_v3_v3(orco, orcodata[mapindex]); + } + else { + copy_v3_v3(orco, vec); + } + } + + if (ornor) { + dm_final->getVertNo(dm_final, mapindex, ornor); + normalize_v3(ornor); + } + + 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_final->getTessFaceData(dm_final, mapindex, CD_MFACE); + mvert = dm_final->getVertDataArray(dm_final, CD_MVERT); + mtface = CustomData_get_layer(&dm_final->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) + copy_v3_v3(nor, tmpnor); + + normalize_v3(tmpnor); /* XXX Why not normalize tmpnor before copying it into nor??? -- mont29 */ + mul_v3_fl(tmpnor, -foffset); + add_v3_v3(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[3], float nor[3], float utan[3], float vtan[3], + float orco[3], float ornor[3]) +{ + /* TODO */ + float zerovec[3] = {0.0f, 0.0f, 0.0f}; + if (vec) { + copy_v3_v3(vec, zerovec); + } + if (nor) { + copy_v3_v3(nor, zerovec); + } + if (utan) { + copy_v3_v3(utan, zerovec); + } + if (vtan) { + copy_v3_v3(vtan, zerovec); + } + if (orco) { + copy_v3_v3(orco, zerovec); + } + if (ornor) { + copy_v3_v3(ornor, zerovec); + } +} +/************************************************/ +/* Particles on emitter */ +/************************************************/ + +CustomDataMask psys_emitter_customdata_mask(ParticleSystem *psys) +{ + CustomDataMask dataMask = 0; + MTex *mtex; + int i; + + if (!psys->part) + return 0; + + for (i = 0; i < MAX_MTEX; i++) { + mtex = psys->part->mtex[i]; + if (mtex && mtex->mapto && (mtex->texco & TEXCO_UV)) + dataMask |= CD_MASK_MTFACE; + } + + if (psys->part->tanfac != 0.0f) + dataMask |= CD_MASK_MTFACE; + + /* ask for vertexgroups if we need them */ + for (i = 0; i < PSYS_TOT_VG; i++) { + if (psys->vgroup[i]) { + dataMask |= CD_MASK_MDEFORMVERT; + break; + } + } + + /* particles only need this if they are after a non deform modifier, and + * the modifier stack will only create them in that case. */ + dataMask |= CD_MASK_ORIGSPACE_MLOOP | CD_MASK_ORIGINDEX; + + dataMask |= CD_MASK_ORCO; + + return dataMask; +} + +void psys_particle_on_emitter(ParticleSystemModifierData *psmd, int from, int index, int index_dmcache, + float fuv[4], float foffset, float vec[3], float nor[3], float utan[3], float vtan[3], + float orco[3], float ornor[3]) +{ + if (psmd && psmd->dm_final) { + 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_final, 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 */ +/************************************************/ + +extern void do_kink(ParticleKey *state, const float par_co[3], const float par_vel[3], const float par_rot[4], float time, float freq, float shape, float amplitude, float flat, + short type, short axis, float obmat[4][4], int smooth_start); +extern float do_clump(ParticleKey *state, const float par_co[3], float time, const float orco_offset[3], float clumpfac, float clumppow, float pa_clump, + bool use_clump_noise, float clump_noise_size, CurveMapping *clumpcurve); + +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; + + sub_v3_v3v3(efd.vec_to_point, state.co, eff->guide_loc); + copy_v3_v3(efd.nor, eff->guide_dir); + efd.distance = len_v3(efd.vec_to_point); + + copy_v3_v3(data->vec_to_point, efd.vec_to_point); + data->strength = effector_falloff(eff, &efd, &point, weights); + } + } +} + +int do_guides(ParticleSettings *part, ListBase *effectors, ParticleKey *state, int index, float time) +{ + CurveMapping *clumpcurve = (part->child_flag & PART_CHILD_USE_CLUMP_CURVE) ? part->clumpcurve : NULL; + CurveMapping *roughcurve = (part->child_flag & PART_CHILD_USE_ROUGH_CURVE) ? part->roughcurve : NULL; + EffectorCache *eff; + PartDeflect *pd; + Curve *cu; + 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); + + copy_v3_v3(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, BKE_displist_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); + } + } + + if (clumpcurve) + curvemapping_changed_all(clumpcurve); + if (roughcurve) + curvemapping_changed_all(roughcurve); + + { + ParticleKey key; + float par_co[3] = {0.0f, 0.0f, 0.0f}; + float par_vel[3] = {0.0f, 0.0f, 0.0f}; + float par_rot[4] = {1.0f, 0.0f, 0.0f, 0.0f}; + float orco_offset[3] = {0.0f, 0.0f, 0.0f}; + + copy_v3_v3(key.co, vec_to_point); + do_kink(&key, par_co, par_vel, par_rot, guidetime, pd->kink_freq, pd->kink_shape, pd->kink_amp, 0.f, pd->kink, pd->kink_axis, 0, 0); + do_clump(&key, par_co, guidetime, orco_offset, pd->clump_fac, pd->clump_pow, 1.0f, + part->child_flag & PART_CHILD_USE_CLUMP_NOISE, part->clump_noise_size, clumpcurve); + copy_v3_v3(vec_to_point, key.co); + } + + add_v3_v3(vec_to_point, guidevec); + + //sub_v3_v3v3(pa_loc, pa_loc, pa_zero); + madd_v3_v3fl(effect, vec_to_point, data->strength); + madd_v3_v3fl(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); + //add_v3_v3(effect, pa_zero); + interp_v3_v3v3(state->co, state->co, effect, totstrength); + + normalize_v3(veffect); + mul_v3_fl(veffect, len_v3(state->vel)); + copy_v3_v3(state->vel, veffect); + return 1; + } + return 0; +} + +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; + + copy_v3_v3(eff_key.co, (ca - 1)->co); + copy_v3_v3(eff_key.vel, (ca - 1)->vel); + copy_qt_qt(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 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 - defvert_find_weight(&dvert[i], psys->vgroup[vgroup] - 1); + } + else { + for (i = 0; i < totvert; i++) + vg[i] = defvert_find_weight(&dvert[i], psys->vgroup[vgroup] - 1); + } + } + } + return vg; +} +void psys_find_parents(ParticleSimulationData *sim, const bool use_render_params) +{ + ParticleSystem *psys = sim->psys; + ParticleSettings *part = sim->psys->part; + KDTree *tree; + ChildParticle *cpa; + ParticleTexture ptex; + 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 ((sim->psys->renderdata || use_render_params) && part->child_nbr && part->ren_child_nbr) + totparent *= (float)part->child_nbr / (float)part->ren_child_nbr; + + /* hard limit, workaround for it being ignored above */ + if (sim->psys->totpart < totparent) { + totparent = sim->psys->totpart; + } + + 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); + + /* Check if particle doesn't exist because of texture influence. Insert only existing particles into kdtree. */ + get_cpa_texture(sim->psmd->dm_final, psys, part, psys->particles + cpa->pa[0], p, cpa->num, cpa->fuv, orco, &ptex, PAMAP_DENS | PAMAP_CHILD, psys->cfra); + + if (ptex.exist >= psys_frand(psys, p + 24)) { + BLI_kdtree_insert(tree, p, orco); + } + } + + 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); + } + + BLI_kdtree_free(tree); +} + +static bool psys_thread_context_init_path( + ParticleThreadContext *ctx, ParticleSimulationData *sim, Scene *scene, + float cfra, const bool editupdate, const bool use_render_params) +{ + ParticleSystem *psys = sim->psys; + ParticleSettings *part = psys->part; + int totparent = 0, between = 0; + int segments = 1 << part->draw_step; + int totchild = psys->totchild; + + psys_thread_context_init(ctx, sim); + + /*---start figuring out what is actually wanted---*/ + if (psys_in_edit_mode(scene, psys)) { + ParticleEditSettings *pset = &scene->toolsettings->particle; + + if ((psys->renderdata == 0 && use_render_params == 0) && (psys->edit == NULL || pset->flag & PE_DRAW_PART) == 0) + totchild = 0; + + segments = 1 << pset->draw_step; + } + + if (totchild && part->childtype == PART_CHILD_FACES) { + totparent = (int)(totchild * part->parents * 0.3f); + + if ((psys->renderdata || use_render_params) && 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 || use_render_params) + segments = 1 << part->ren_step; + else { + totchild = (int)((float)totchild * (float)part->disp / 100.0f); + totparent = MIN2(totparent, totchild); + } + + if (totchild == 0) + return false; + + /* fill context values */ + ctx->between = between; + ctx->segments = segments; + if (ELEM(part->kink, PART_KINK_SPIRAL)) + ctx->extra_segments = max_ii(part->kink_extra_steps, 1); + else + ctx->extra_segments = 0; + ctx->totchild = totchild; + ctx->totparent = totparent; + ctx->parent_pass = 0; + ctx->cfra = cfra; + ctx->editupdate = editupdate; + + psys->lattice_deform_data = psys_create_lattice_deform_data(&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); + + /* prepare curvemapping tables */ + if ((part->child_flag & PART_CHILD_USE_CLUMP_CURVE) && part->clumpcurve) { + ctx->clumpcurve = curvemapping_copy(part->clumpcurve); + curvemapping_changed_all(ctx->clumpcurve); + } + else { + ctx->clumpcurve = NULL; + } + if ((part->child_flag & PART_CHILD_USE_ROUGH_CURVE) && part->roughcurve) { + ctx->roughcurve = curvemapping_copy(part->roughcurve); + curvemapping_changed_all(ctx->roughcurve); + } + else { + ctx->roughcurve = NULL; + } + + return true; +} + +static void psys_task_init_path(ParticleTask *task, ParticleSimulationData *sim) +{ + /* init random number generator */ + int seed = 31415926 + sim->psys->seed; + + task->rng_path = BLI_rng_new(seed); +} + +/* note: this function must be thread safe, except for branching! */ +static void psys_thread_create_path(ParticleTask *task, struct ChildParticle *cpa, ParticleCacheKey *child_keys, int i) +{ + ParticleThreadContext *ctx = task->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 ? psys->edit->pathcache : psys->pathcache; + ParticleCacheKey *child, *key[4]; + ParticleTexture ptex; + float *cpa_fuv = 0, *par_rot = 0, rot[4]; + float orco[3], ornor[3], hairmat[4][4], dvec[3], off1[4][3], off2[4][3]; + 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->segments + 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) { + const ParticleCacheKey *key_0_last = pcache_key_segment_endpoint_safe(key[0]); + for (w = 0; w < 4; w++) { + if (w && (weight[w] > 0.f)) { + const ParticleCacheKey *key_w_last = pcache_key_segment_endpoint_safe(key[w]); + 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_last->co, key_w_last->co); + + d = d1 > 0.f ? d2 / d1 - 1.f : 10000.f; + } + else { + float v1[3], v2[3]; + sub_v3_v3v3(v1, key_0_last->co, key[0]->co); + sub_v3_v3v3(v2, key_w_last->co, key[w]->co); + normalize_v3(v1); + normalize_v3(v2); + + d = RAD2DEGF(saacos(dot_v3v3(v1, v2))); + } + + 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_final, 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->segments + 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; + /* XXX hack to avoid messed up particle num and subsequent crash (#40733) */ + if (cpa_num > ctx->sim.psmd->dm_final->getNumTessFaces(ctx->sim.psmd->dm_final)) + cpa_num = 0; + 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_final, psys->part->from, pa, hairmat); + } + + child_keys->segments = ctx->segments; + + /* 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(psys, i + 24)) { + child_keys->segments = -1; + return; + } + + /* create the child path */ + for (k = 0, child = child_keys; k <= ctx->segments; 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->segments); + } + + 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); + } + + child->time = (float)k / (float)ctx->segments; + } + + /* apply effectors */ + if (part->flag & PART_CHILD_EFFECT) { + for (k = 0, child = child_keys; k <= ctx->segments; k++, child++) { + if (k) { + do_path_effectors(&ctx->sim, cpa->pa[0], child, k, ctx->segments, 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); + } + } + } + + { + ParticleData *pa = NULL; + ParticleCacheKey *par = NULL; + float par_co[3]; + float par_orco[3]; + + if (ctx->totparent) { + if (i >= ctx->totparent) { + pa = &psys->particles[cpa->parent]; + /* this is now threadsafe, virtual parents are calculated before rest of children */ + BLI_assert(cpa->parent < psys->totchildcache); + par = cache[cpa->parent]; + } + } + else if (cpa->parent >= 0) { + pa = &psys->particles[cpa->parent]; + par = pcache[cpa->parent]; + + /* If particle is unexisting, try to pick a viable parent from particles used for interpolation. */ + for (k = 0; k < 4 && pa && (pa->flag & PARS_UNEXIST); k++) { + if (cpa->pa[k] >= 0) { + pa = &psys->particles[cpa->pa[k]]; + par = pcache[cpa->pa[k]]; + } + } + + if (pa->flag & PARS_UNEXIST) pa = NULL; + } + + if (pa) { + ListBase modifiers; + BLI_listbase_clear(&modifiers); + + psys_particle_on_emitter(ctx->sim.psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, + par_co, NULL, NULL, NULL, par_orco, NULL); + + psys_apply_child_modifiers(ctx, &modifiers, cpa, &ptex, orco, ornor, hairmat, child_keys, par, par_orco); + } + else + zero_v3(par_orco); + } + + /* Hide virtual parents */ + if (i < ctx->totparent) + child_keys->segments = -1; +} + +static void exec_child_path_cache(TaskPool * __restrict UNUSED(pool), void *taskdata, int UNUSED(threadid)) +{ + ParticleTask *task = taskdata; + ParticleThreadContext *ctx = task->ctx; + ParticleSystem *psys = ctx->sim.psys; + ParticleCacheKey **cache = psys->childcache; + ChildParticle *cpa; + int i; + + cpa = psys->child + task->begin; + for (i = task->begin; i < task->end; ++i, ++cpa) { + BLI_assert(i < psys->totchildcache); + psys_thread_create_path(task, cpa, cache[i], i); + } +} + +void psys_cache_child_paths( + ParticleSimulationData *sim, float cfra, + const bool editupdate, const bool use_render_params) +{ + TaskScheduler *task_scheduler; + TaskPool *task_pool; + ParticleThreadContext ctx; + ParticleTask *tasks_parent, *tasks_child; + int numtasks_parent, numtasks_child; + int i, totchild, totparent; + + if (sim->psys->flag & PSYS_GLOBAL_HAIR) + return; + + /* create a task pool for child path tasks */ + if (!psys_thread_context_init_path(&ctx, sim, sim->scene, cfra, editupdate, use_render_params)) + return; + + task_scheduler = BLI_task_scheduler_get(); + task_pool = BLI_task_pool_create(task_scheduler, &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.segments + ctx.extra_segments + 1); + sim->psys->totchildcache = totchild; + } + + /* cache parent paths */ + ctx.parent_pass = 1; + psys_tasks_create(&ctx, 0, totparent, &tasks_parent, &numtasks_parent); + for (i = 0; i < numtasks_parent; ++i) { + ParticleTask *task = &tasks_parent[i]; + + psys_task_init_path(task, sim); + BLI_task_pool_push(task_pool, exec_child_path_cache, task, false, TASK_PRIORITY_LOW); + } + BLI_task_pool_work_and_wait(task_pool); + + /* cache child paths */ + ctx.parent_pass = 0; + psys_tasks_create(&ctx, totparent, totchild, &tasks_child, &numtasks_child); + for (i = 0; i < numtasks_child; ++i) { + ParticleTask *task = &tasks_child[i]; + + psys_task_init_path(task, sim); + BLI_task_pool_push(task_pool, exec_child_path_cache, task, false, TASK_PRIORITY_LOW); + } + BLI_task_pool_work_and_wait(task_pool); + + BLI_task_pool_free(task_pool); + + psys_tasks_free(tasks_parent, numtasks_parent); + psys_tasks_free(tasks_child, numtasks_child); + + psys_thread_context_free(&ctx); +} + +/* 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) { + copy_v4_v4(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 + * - Useful 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, const bool use_render_params) +{ + 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 segments = (int)pow(2.0, (double)((psys->renderdata || use_render_params) ? 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; + + 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, segments + 1); + + psys->lattice_deform_data = psys_create_lattice_deform_data(sim); + ma = give_current_material(sim->ob, psys->part->omat); + if (ma && (psys->part->draw_col == PART_DRAW_COL_MAT)) + copy_v3_v3(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_final, psys, PSYS_VG_EFFECTOR); + + if (!psys->totchild) + vg_length = psys_cache_vgroup(psmd->dm_final, psys, PSYS_VG_LENGTH); + } + + /* ensure we have tessfaces to be used for mapping */ + if (part->from != PART_FROM_VERT) { + DM_ensure_tessface(psmd->dm_final); + } + + /*---first main loop: create all actual particles' paths---*/ + LOOP_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, psys->seed + p)); + if (vg_length) + pa_length *= psys_particle_value_from_verts(psmd->dm_final, 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]) * (segments + 1)); + + cache[p]->segments = segments; + + /*--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_final, 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]); + + 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]->segments = -1; + continue; + } + + dietime = birthtime + pa_length * (dietime - birthtime); + + /*--interpolate actual path from data points--*/ + for (k = 0, ca = cache[p]; k <= segments; k++, ca++) { + time = (float)k / (float)segments; + 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); + } + + if (part->type == PART_HAIR) { + HairKey *hkey; + + for (k = 0, hkey = pa->hair; k < pa->totkey; ++k, ++hkey) { + mul_v3_m4v3(hkey->world_co, hairmat, hkey->co); + } + } + + /*--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_final, 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 <= segments; k++, ca++) + do_path_effectors(sim, p, ca, k, segments, 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 <= segments; k++, ca++) + /* ca is safe to cast, since only co and vel are used */ + do_guides(sim->psys->part, sim->psys->effectors, (ParticleKey *)ca, p, (float)k / (float)segments); + } + + /* lattices have to be calculated separately to avoid mixups between effector calculations */ + if (psys->lattice_deform_data) { + for (k = 0, ca = cache[p]; k <= segments; k++, ca++) + calc_latt_deform(psys->lattice_deform_data, ca->co, 1.0f); + } + } + + /* finally do rotation & velocity */ + for (k = 1, ca = cache[p] + 1; k <= segments; k++, ca++) { + cache_key_incremental_rotation(ca, ca - 1, ca - 2, prev_tangent, k); + + if (k == segments) + 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); + + ca->time = (float)k / (float)segments; + } + /* 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_deform_data) { + end_latt_deform(psys->lattice_deform_data); + psys->lattice_deform_data = 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, const bool use_render_params) +{ + 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 segments = 1 << pset->draw_step; + int totpart = edit->totpoint, recalc_set = 0; + float sel_col[3]; + float nosel_col[3]; + + segments = MAX2(segments, 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, segments + 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; + + if (point->totkey == 0) + 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]) * (segments + 1)); + + cache[i]->segments = segments; + + /*--get the first data points--*/ + init_particle_interpolation(ob, psys, pa, &pind); + + if (psys) { + psys_mat_hair_to_global(ob, psmd->dm_final, 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]->segments = -1; + continue; + } + + /*--interpolate actual path from data points--*/ + for (k = 0, ca = cache[i]; k <= segments; k++, ca++) { + time = (float)k / (float)segments; + 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 == segments) + 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[2] = 1.0f; + } + + /* selection coloring in edit mode */ + if (pset->brushtype == PE_BRUSH_WEIGHT) { + float t2; + + if (k == 0) { + weight_to_rgb(ca->col, pind.hkey[1]->weight); + } + else { + float w1[3], w2[3]; + keytime = (t - (*pind.ekey[0]->time)) / ((*pind.ekey[1]->time) - (*pind.ekey[0]->time)); + + weight_to_rgb(w1, pind.hkey[0]->weight); + weight_to_rgb(w2, pind.hkey[1]->weight); + + 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)segments) * (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) { + copy_v3_v3(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 { + copy_v3_v3(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, true, use_render_params); + } + + /* 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[3], float vel[3], float rot[4], float *time) +{ + if (loc) copy_v3_v3(loc, key->co); + if (vel) copy_v3_v3(vel, key->vel); + if (rot) copy_qt_qt(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]; + + add_v3_v3(key->vel, key->co); + + mul_m4_v3(ob->obmat, key->co); + mul_m4_v3(ob->obmat, key->vel); + mat4_to_quat(q, ob->obmat); + + sub_v3_v3v3(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][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][4], int orco) +{ + float v[3][3]; + MFace *mface; + OrigSpaceFace *osface; + float (*orcodata)[3]; + + int i = (ELEM(pa->num_dmcache, DMCACHE_ISCHILD, DMCACHE_NOTFOUND)) ? pa->num : pa->num_dmcache; + if (i == -1 || i >= dm->getNumTessFaces(dm)) { unit_m4(mat); return; } + + mface = dm->getTessFaceData(dm, i, CD_MFACE); + osface = dm->getTessFaceData(dm, i, CD_ORIGSPACE); + + if (orco && (orcodata = dm->getVertDataArray(dm, CD_ORCO))) { + copy_v3_v3(v[0], orcodata[mface->v1]); + copy_v3_v3(v[1], orcodata[mface->v2]); + copy_v3_v3(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)) + BKE_mesh_orco_verts_transform(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][4]) +{ + float vec[3]; + + /* can happen when called from a different object's modifier */ + if (!dm) { + unit_m4(hairmat); + return; + } + + 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); + copy_v3_v3(hairmat[3], vec); +} + +void psys_mat_hair_to_orco(Object *ob, DerivedMesh *dm, short from, ParticleData *pa, float hairmat[4][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)) + BKE_mesh_orco_verts_transform(ob->data, &orco, 1, 1); + copy_v3_v3(hairmat[3], orco); +} + +void psys_vec_rot_to_face(DerivedMesh *dm, ParticleData *pa, float vec[3]) +{ + 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][4]) +{ + float facemat[4][4]; + + psys_mat_hair_to_object(ob, dm, from, pa, facemat); + + mul_m4_m4m4(hairmat, ob->obmat, facemat); +} + +/************************************************/ +/* 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(DATA_("ParticleSettings"), NULL); + + if (BLI_listbase_count_ex(&ob->particlesystem, 2) > 1) + BLI_snprintf(psys->name, sizeof(psys->name), DATA_("ParticleSystem %i"), BLI_listbase_count(&ob->particlesystem)); + else + BLI_strncpy(psys->name, DATA_("ParticleSystem"), sizeof(psys->name)); + + md = modifier_new(eModifierType_ParticleSystem); + + if (name) + BLI_strncpy_utf8(md->name, name, sizeof(md->name)); + else + BLI_snprintf(md->name, sizeof(md->name), DATA_("ParticleSystem %i"), BLI_listbase_count(&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_CURRENT; + psys->cfra = BKE_scene_frame_get_from_ctime(scene, CFRA + 1); + + DAG_relations_tag_update(G.main); + DAG_id_tag_update(&ob->id, OB_RECALC_DATA); + + return md; +} +void object_remove_particle_system(Scene *UNUSED(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->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); + if (psys->part) { + id_us_min(&psys->part->id); + } + psys_free(ob, psys); + + if (ob->particlesystem.first) + ((ParticleSystem *) ob->particlesystem.first)->flag |= PSYS_CURRENT; + else + ob->mode &= ~OB_MODE_PARTICLE_EDIT; + + DAG_relations_tag_update(G.main); + 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->courant_target = 0.2; + + 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->kink_extra_steps = 4; + part->clump_noise_size = 1.0f; + 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_VELOCITY; + + 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); + + part->omat = 1; + part->use_modifier_stack = false; +} + + +ParticleSettings *psys_new_settings(const char *name, Main *main) +{ + ParticleSettings *part; + + if (main == NULL) + main = G.main; + + part = BKE_libblock_alloc(main, ID_PA, name); + + default_particle_settings(part); + + return part; +} + +void BKE_particlesettings_clump_curve_init(ParticleSettings *part) +{ + CurveMapping *cumap = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f); + + cumap->cm[0].curve[0].x = 0.0f; + cumap->cm[0].curve[0].y = 1.0f; + cumap->cm[0].curve[1].x = 1.0f; + cumap->cm[0].curve[1].y = 1.0f; + + part->clumpcurve = cumap; +} + +void BKE_particlesettings_rough_curve_init(ParticleSettings *part) +{ + CurveMapping *cumap = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f); + + cumap->cm[0].curve[0].x = 0.0f; + cumap->cm[0].curve[0].y = 1.0f; + cumap->cm[0].curve[1].x = 1.0f; + cumap->cm[0].curve[1].y = 1.0f; + + part->roughcurve = cumap; +} + +ParticleSettings *BKE_particlesettings_copy(Main *bmain, ParticleSettings *part) +{ + ParticleSettings *partn; + int a; + + partn = BKE_libblock_copy(bmain, &part->id); + + 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); + + if (part->clumpcurve) + partn->clumpcurve = curvemapping_copy(part->clumpcurve); + if (part->roughcurve) + partn->roughcurve = curvemapping_copy(part->roughcurve); + + 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); + + BKE_id_copy_ensure_local(bmain, &part->id, &partn->id); + + return partn; +} + +void BKE_particlesettings_make_local(Main *bmain, ParticleSettings *part, const bool lib_local) +{ + BKE_id_make_local_generic(bmain, &part->id, true, lib_local); +} + +/************************************************/ +/* Textures */ +/************************************************/ + +static int get_particle_uv(DerivedMesh *dm, ParticleData *pa, int face_index, const float fuv[4], 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 = ELEM(pa->num_dmcache, DMCACHE_NOTFOUND, DMCACHE_ISCHILD) ? pa->num : pa->num_dmcache; + if (i >= dm->getNumTessFaces(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->getTessFaceData(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); \ + } (void)0 + +#define CLAMP_PARTICLE_TEXTURE_POS(type, pvalue) \ + if (event & type) { \ + CLAMP(pvalue, 0.0f, 1.0f); \ + } (void)0 + +#define CLAMP_WARP_PARTICLE_TEXTURE_POS(type, pvalue) \ + if (event & type) { \ + if (pvalue < 0.0f) \ + pvalue = 1.0f + pvalue; \ + CLAMP(pvalue, 0.0f, 1.0f); \ + } (void)0 + +#define CLAMP_PARTICLE_TEXTURE_POSNEG(type, pvalue) \ + if (event & type) { \ + CLAMP(pvalue, -1.0f, 1.0f); \ + } (void)0 + +static void get_cpa_texture(DerivedMesh *dm, ParticleSystem *psys, ParticleSettings *part, ParticleData *par, int child_index, int face_index, const float fw[4], 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_freq = ptex->kink_amp = + ptex->effector = ptex->rough1 = ptex->rough2 = ptex->roughe = 1.0f; + + ptex->length = 1.0f - part->randlength * psys_frand(psys, child_index + 26); + ptex->length *= part->clength_thres < psys_frand(psys, child_index + 27) ? part->clength : 1.0f; + + for (m = 0; m < MAX_MTEX; m++, mtexp++) { + mtex = *mtexp; + if (mtex && mtex->tex && 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, NULL, false, false); + + 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_AMP, ptex->kink_amp, mtex->kinkampfac); + SET_PARTICLE_TEXTURE(PAMAP_KINK_FREQ, ptex->kink_freq, mtex->kinkfac); + SET_PARTICLE_TEXTURE(PAMAP_DENS, ptex->exist, mtex->padensfac); + } + } + + CLAMP_PARTICLE_TEXTURE_POS(PAMAP_LENGTH, ptex->length); + CLAMP_WARP_PARTICLE_TEXTURE_POS(PAMAP_CLUMP, ptex->clump); + CLAMP_WARP_PARTICLE_TEXTURE_POS(PAMAP_KINK_AMP, ptex->kink_amp); + CLAMP_WARP_PARTICLE_TEXTURE_POS(PAMAP_KINK_FREQ, ptex->kink_freq); + CLAMP_WARP_PARTICLE_TEXTURE_POS(PAMAP_ROUGH, ptex->rough1); + CLAMP_WARP_PARTICLE_TEXTURE_POS(PAMAP_DENS, ptex->exist); +} +void psys_get_texture(ParticleSimulationData *sim, ParticleData *pa, ParticleTexture *ptex, int event, float cfra) +{ + Object *ob = sim->ob; + Mesh *me = (Mesh *)ob->data; + 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_freq = ptex->kink_amp = + ptex->effector = ptex->rough1 = ptex->rough2 = ptex->roughe = 1.0f; + + ptex->time = (float)(pa - sim->psys->particles) / (float)sim->psys->totpart; + + for (m = 0; m < MAX_MTEX; m++, mtexp++) { + mtex = *mtexp; + if (mtex && mtex->tex && 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_final, 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); + + if (me->bb == NULL || (me->bb->flag & BOUNDBOX_DIRTY)) { + BKE_mesh_texspace_calc(me); + } + sub_v3_v3(texvec, me->loc); + if (me->size[0] != 0.0f) texvec[0] /= me->size[0]; + if (me->size[1] != 0.0f) texvec[1] /= me->size[1]; + if (me->size[2] != 0.0f) texvec[2] /= me->size[2]; + break; + case TEXCO_PARTICLE: + /* texture coordinates in range [-1, 1] */ + texvec[0] = 2.f * (cfra - pa->time) / (pa->dietime - pa->time) - 1.f; + if (sim->psys->totpart > 0) + texvec[1] = 2.f * (float)(pa - sim->psys->particles) / (float)sim->psys->totpart - 1.f; + else + texvec[1] = 0.0f; + texvec[2] = 0.f; + break; + } + + externtex(mtex, texvec, &value, rgba, rgba + 1, rgba + 2, rgba + 3, 0, NULL, false, false); + + 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_WARP_PARTICLE_TEXTURE_POS(PAMAP_TIME, ptex->time); + CLAMP_WARP_PARTICLE_TEXTURE_POS(PAMAP_LIFE, ptex->life); + CLAMP_WARP_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_WARP_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(psys, 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(psys, 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(psys, 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_freq *= 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); +} +/* 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, const bool 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) { + /* interpolate pathcache directly if it exist */ + if (psys->pathcache) { + ParticleCacheKey result; + interpolate_pathcache(psys->pathcache[p], t, &result); + copy_v3_v3(state->co, result.co); + copy_v3_v3(state->vel, result.vel); + copy_qt_qt(state->rot, result.rot); + } + /* otherwise interpolate with other means */ + else { + 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 don't 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_final, 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->part, sim->psys->effectors, state, p, state->time); + /* TODO: proper velocity handling */ + } + + if (psys->lattice_deform_data && edit == 0) + calc_latt_deform(psys->lattice_deform_data, state->co, 1.0f); + } + } + } + } + else if (totchild) { + //invert_m4_m4(imat, ob->obmat); + + /* interpolate childcache directly if it exists */ + if (psys->childcache) { + ParticleCacheKey result; + interpolate_pathcache(psys->childcache[p - totpart], t, &result); + copy_v3_v3(state->co, result.co); + copy_v3_v3(state->vel, result.vel); + copy_qt_qt(state->rot, result.rot); + } + else { + float par_co[3], par_orco[3]; + + 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 */ + //copy_v3_v3(cpa_1st, co); + + //mul_m4_v3(ob->obmat, cpa_1st); + + pa = psys->particles + cpa->parent; + + psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, par_co, 0, 0, 0, par_orco, 0); + if (part->type == PART_HAIR) + psys_mat_hair_to_global(sim->ob, sim->psmd->dm_final, 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; + + psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, par_co, 0, 0, 0, par_orco, 0); + 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_final, 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_final; + 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 */ + //add_v3_v3(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(NULL, sim, &ptex, par->co, par->vel, par->rot, par_orco, cpa, orco, hairmat, state, t); + + /* try to estimate correct velocity */ + if (vel) { + ParticleKey tstate_tmp; + float length = len_v3(state->vel); + + if (t >= 0.001f) { + tstate_tmp.time = t - 0.001f; + psys_get_particle_on_path(sim, p, &tstate_tmp, 0); + sub_v3_v3v3(state->vel, state->co, tstate_tmp.co); + normalize_v3(state->vel); + } + else { + tstate_tmp.time = t + 0.001f; + psys_get_particle_on_path(sim, p, &tstate_tmp, 0); + sub_v3_v3v3(state->vel, tstate_tmp.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 : BKE_scene_frame_get(sim->scene); + + 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(psys, p + 23))) / (part->lifetime * psys_frand(psys, 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; + float par_orco[3] = {0.0f, 0.0f, 0.0f}; + + 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(NULL, sim, NULL, key1->co, key1->vel, key1->rot, par_orco, cpa, cpa->fuv, mat, state, t); + + if (psys->lattice_deform_data) + calc_latt_deform(psys->lattice_deform_data, 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_deform_data) + calc_latt_deform(sim->psys->lattice_deform_data, state->co, 1.0f); + } + + return 1; + } +} + +void psys_get_dupli_texture(ParticleSystem *psys, ParticleSettings *part, + ParticleSystemModifierData *psmd, ParticleData *pa, ChildParticle *cpa, + float uv[2], float orco[3]) +{ + MFace *mface; + MTFace *mtface; + float loc[3]; + int num; + + /* XXX: on checking '(psmd->dm != NULL)' + * This is incorrect but needed for metaball evaluation. + * Ideally this would be calculated via the depsgraph, however with metaballs, + * the entire scenes dupli's are scanned, which also looks into uncalculated data. + * + * For now just include this workaround as an alternative to crashing, + * but longer term metaballs should behave in a more manageable way, see: T46622. */ + + uv[0] = uv[1] = 0.f; + + /* Grid distribution doesn't support UV or emit from vertex mode */ + bool is_grid = (part->distr == PART_DISTR_GRID && part->from != PART_FROM_VERT); + + if (cpa) { + if ((part->childtype == PART_CHILD_FACES) && (psmd->dm_final != NULL)) { + CustomData *mtf_data = psmd->dm_final->getTessFaceDataLayout(psmd->dm_final); + const int uv_idx = CustomData_get_render_layer(mtf_data, CD_MTFACE); + mtface = CustomData_get_layer_n(mtf_data, CD_MTFACE, uv_idx); + + if (mtface && !is_grid) { + mface = psmd->dm_final->getTessFaceData(psmd->dm_final, 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) && (psmd->dm_final != NULL) && !is_grid) { + CustomData *mtf_data = psmd->dm_final->getTessFaceDataLayout(psmd->dm_final); + const int uv_idx = CustomData_get_render_layer(mtf_data, CD_MTFACE); + mtface = CustomData_get_layer_n(mtf_data, CD_MTFACE, uv_idx); + + num = pa->num_dmcache; + + if (num == DMCACHE_NOTFOUND) + num = pa->num; + + if (num >= psmd->dm_final->getNumTessFaces(psmd->dm_final)) { + /* happens when simplify is enabled + * gives invalid coords but would crash otherwise */ + num = DMCACHE_NOTFOUND; + } + + if (mtface && !ELEM(num, DMCACHE_NOTFOUND, DMCACHE_ISCHILD)) { + mface = psmd->dm_final->getTessFaceData(psmd->dm_final, 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][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; + float xvec[3] = {-1.0, 0.0, 0.0}, nmat[3][3]; + + sub_v3_v3v3(vec, (cache + cache->segments)->co, cache->co); + len = normalize_v3(vec); + + 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); + + if (psys->part->rotmode == PART_ROT_VEL) { + transpose_m3_m4(nmat, ob->imat); + mul_m3_v3(nmat, nor); + normalize_v3(nor); + + /* make sure that we get a proper side vector */ + if (fabsf(dot_v3v3(nor, vec)) > 0.999999f) { + if (fabsf(dot_v3v3(nor, xvec)) > 0.999999f) { + 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); + + /* rotate side vector around vec */ + if (psys->part->phasefac != 0) { + float q_phase[4]; + float phasefac = psys->part->phasefac; + if (psys->part->randphasefac != 0.0f) + phasefac += psys->part->randphasefac * psys_frand(psys, (pa - psys->particles) + 20); + axis_angle_to_quat(q_phase, vec, phasefac * (float)M_PI); + + mul_qt_v3(q_phase, side); + } + + cross_v3_v3v3(nor, vec, side); + + unit_m4(mat); + copy_v3_v3(mat[0], vec); + copy_v3_v3(mat[1], side); + copy_v3_v3(mat[2], nor); + } + else { + quat_to_mat4(mat, pa->state.rot); + } + + *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 ((!isfinite(bb->vec[0])) || (!isfinite(bb->vec[1])) || (!isfinite(bb->vec[2])) || + (!isfinite(bb->vel[0])) || (!isfinite(bb->vel[1])) || (!isfinite(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); + + sub_v3_v3v3(zvec, bb->ob->obmat[3], bb->vec); + + if (bb->lock) { + float fac = -dot_v3v3(zvec, temp); + + madd_v3_v3fl(zvec, temp, fac); + } + normalize_v3(zvec); + + cross_v3_v3v3(xvec, temp, zvec); + normalize_v3(xvec); + + cross_v3_v3v3(yvec, zvec, xvec); + } + else { + sub_v3_v3v3(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); + } + + copy_v3_v3(tvec, xvec); + copy_v3_v3(tvec2, yvec); + + mul_v3_fl(xvec, cosf(bb->tilt * (float)M_PI)); + mul_v3_fl(tvec2, sinf(bb->tilt * (float)M_PI)); + add_v3_v3(xvec, tvec2); + + mul_v3_fl(yvec, cosf(bb->tilt * (float)M_PI)); + mul_v3_fl(tvec, -sinf(bb->tilt * (float)M_PI)); + add_v3_v3(yvec, tvec); + + mul_v3_fl(xvec, bb->size[0]); + mul_v3_fl(yvec, bb->size[1]); + + madd_v3_v3v3fl(center, bb->vec, xvec, bb->offset[0]); + madd_v3_v3fl(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_deform_data = psys_create_lattice_deform_data(&sim); + + if (psys->lattice_deform_data) { + 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_final, 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_deform_data, hkey->co, 1.0f); + mul_m4_v3(imat, hkey->co); + } + } + + end_latt_deform(psys->lattice_deform_data); + psys->lattice_deform_data = NULL; + + /* protect the applied shape */ + psys->flag |= PSYS_EDITED; + } +} |