diff options
author | Lukas Tönne <lukas.toenne@gmail.com> | 2014-10-28 18:29:33 +0300 |
---|---|---|
committer | Lukas Tönne <lukas.toenne@gmail.com> | 2015-01-20 11:30:04 +0300 |
commit | 0f43ba82353a261b834e1c7b01ff8bde35453b72 (patch) | |
tree | a36bcf2bea4f873dfc798ba9ba020d0d00b2eaf2 /source/blender/blenkernel/intern/particle_system.c | |
parent | f03fc27bf78f035617d97d536149bceeb9ab1e68 (diff) |
Moved particle code for distributions into own file to make hacking
easier.
This code is badly broken and needs to be replaced, but at least having
a workable code structure might help with quick hacks to fix the worst
cases.
Diffstat (limited to 'source/blender/blenkernel/intern/particle_system.c')
-rw-r--r-- | source/blender/blenkernel/intern/particle_system.c | 1059 |
1 files changed, 6 insertions, 1053 deletions
diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c index 877c2ccdec9..6956766f5ea 100644 --- a/source/blender/blenkernel/intern/particle_system.c +++ b/source/blender/blenkernel/intern/particle_system.c @@ -285,7 +285,7 @@ static void realloc_particles(ParticleSimulationData *sim, int new_totpart) } } -static int get_psys_child_number(struct Scene *scene, ParticleSystem *psys) +int psys_get_child_number(Scene *scene, ParticleSystem *psys) { int nbr; @@ -300,30 +300,9 @@ static int get_psys_child_number(struct Scene *scene, ParticleSystem *psys) return get_render_child_particle_number(&scene->r, nbr); } -static int get_psys_tot_child(struct Scene *scene, ParticleSystem *psys) +int psys_get_tot_child(Scene *scene, ParticleSystem *psys) { - return psys->totpart*get_psys_child_number(scene, psys); -} - -static void alloc_child_particles(ParticleSystem *psys, int tot) -{ - if (psys->child) { - /* only re-allocate if we have to */ - if (psys->part->childtype && psys->totchild == tot) { - memset(psys->child, 0, tot*sizeof(ChildParticle)); - return; - } - - MEM_freeN(psys->child); - psys->child=NULL; - psys->totchild=0; - } - - if (psys->part->childtype) { - psys->totchild= tot; - if (psys->totchild) - psys->child= MEM_callocN(psys->totchild*sizeof(ChildParticle), "child_particles"); - } + return psys->totpart*psys_get_child_number(scene, psys); } /************************************************/ @@ -453,1032 +432,6 @@ void psys_calc_dmcache(Object *ob, DerivedMesh *dm, ParticleSystem *psys) } } -static void distribute_simple_children(Scene *scene, Object *ob, DerivedMesh *finaldm, ParticleSystem *psys) -{ - ChildParticle *cpa = NULL; - int i, p; - int child_nbr= get_psys_child_number(scene, psys); - int totpart= get_psys_tot_child(scene, psys); - - alloc_child_particles(psys, totpart); - - cpa = psys->child; - for (i=0; i<child_nbr; i++) { - for (p=0; p<psys->totpart; p++,cpa++) { - float length=2.0; - cpa->parent=p; - - /* create even spherical distribution inside unit sphere */ - while (length>=1.0f) { - cpa->fuv[0]=2.0f*BLI_frand()-1.0f; - cpa->fuv[1]=2.0f*BLI_frand()-1.0f; - cpa->fuv[2]=2.0f*BLI_frand()-1.0f; - length=len_v3(cpa->fuv); - } - - cpa->num=-1; - } - } - /* dmcache must be updated for parent particles if children from faces is used */ - psys_calc_dmcache(ob, finaldm, psys); -} -static void distribute_grid(DerivedMesh *dm, ParticleSystem *psys) -{ - ParticleData *pa=NULL; - float min[3], max[3], delta[3], d; - MVert *mv, *mvert = dm->getVertDataArray(dm,0); - int totvert=dm->getNumVerts(dm), from=psys->part->from; - int i, j, k, p, res=psys->part->grid_res, size[3], axis; - - /* find bounding box of dm */ - if (totvert > 0) { - mv=mvert; - copy_v3_v3(min, mv->co); - copy_v3_v3(max, mv->co); - mv++; - for (i = 1; i < totvert; i++, mv++) { - minmax_v3v3_v3(min, max, mv->co); - } - } - else { - zero_v3(min); - zero_v3(max); - } - - sub_v3_v3v3(delta, max, min); - - /* determine major axis */ - axis = axis_dominant_v3_single(delta); - - d = delta[axis]/(float)res; - - size[axis] = res; - size[(axis+1)%3] = (int)ceil(delta[(axis+1)%3]/d); - size[(axis+2)%3] = (int)ceil(delta[(axis+2)%3]/d); - - /* float errors grrr.. */ - size[(axis+1)%3] = MIN2(size[(axis+1)%3],res); - size[(axis+2)%3] = MIN2(size[(axis+2)%3],res); - - size[0] = MAX2(size[0], 1); - size[1] = MAX2(size[1], 1); - size[2] = MAX2(size[2], 1); - - /* no full offset for flat/thin objects */ - min[0]+= d < delta[0] ? d/2.f : delta[0]/2.f; - min[1]+= d < delta[1] ? d/2.f : delta[1]/2.f; - min[2]+= d < delta[2] ? d/2.f : delta[2]/2.f; - - for (i=0,p=0,pa=psys->particles; i<res; i++) { - for (j=0; j<res; j++) { - for (k=0; k<res; k++,p++,pa++) { - pa->fuv[0] = min[0] + (float)i*d; - pa->fuv[1] = min[1] + (float)j*d; - pa->fuv[2] = min[2] + (float)k*d; - pa->flag |= PARS_UNEXIST; - pa->hair_index = 0; /* abused in volume calculation */ - } - } - } - - /* enable particles near verts/edges/faces/inside surface */ - if (from==PART_FROM_VERT) { - float vec[3]; - - pa=psys->particles; - - min[0] -= d/2.0f; - min[1] -= d/2.0f; - min[2] -= d/2.0f; - - for (i=0,mv=mvert; i<totvert; i++,mv++) { - sub_v3_v3v3(vec,mv->co,min); - vec[0]/=delta[0]; - vec[1]/=delta[1]; - vec[2]/=delta[2]; - pa[((int)(vec[0] * (size[0] - 1)) * res + - (int)(vec[1] * (size[1] - 1))) * res + - (int)(vec[2] * (size[2] - 1))].flag &= ~PARS_UNEXIST; - } - } - else if (ELEM(from,PART_FROM_FACE,PART_FROM_VOLUME)) { - float co1[3], co2[3]; - - MFace *mface= NULL, *mface_array; - float v1[3], v2[3], v3[3], v4[4], lambda; - int a, a1, a2, a0mul, a1mul, a2mul, totface; - int amax= from==PART_FROM_FACE ? 3 : 1; - - totface=dm->getNumTessFaces(dm); - mface=mface_array=dm->getTessFaceDataArray(dm,CD_MFACE); - - for (a=0; a<amax; a++) { - if (a==0) { a0mul=res*res; a1mul=res; a2mul=1; } - else if (a==1) { a0mul=res; a1mul=1; a2mul=res*res; } - else { a0mul=1; a1mul=res*res; a2mul=res; } - - for (a1=0; a1<size[(a+1)%3]; a1++) { - for (a2=0; a2<size[(a+2)%3]; a2++) { - mface= mface_array; - - pa = psys->particles + a1*a1mul + a2*a2mul; - copy_v3_v3(co1, pa->fuv); - co1[a] -= d < delta[a] ? d/2.f : delta[a]/2.f; - copy_v3_v3(co2, co1); - co2[a] += delta[a] + 0.001f*d; - co1[a] -= 0.001f*d; - - /* lets intersect the faces */ - for (i=0; i<totface; i++,mface++) { - copy_v3_v3(v1, mvert[mface->v1].co); - copy_v3_v3(v2, mvert[mface->v2].co); - copy_v3_v3(v3, mvert[mface->v3].co); - - if (isect_axial_line_tri_v3(a, co1, co2, v2, v3, v1, &lambda)) { - if (from==PART_FROM_FACE) - (pa+(int)(lambda*size[a])*a0mul)->flag &= ~PARS_UNEXIST; - else /* store number of intersections */ - (pa+(int)(lambda*size[a])*a0mul)->hair_index++; - } - else if (mface->v4) { - copy_v3_v3(v4, mvert[mface->v4].co); - - if (isect_axial_line_tri_v3(a, co1, co2, v4, v1, v3, &lambda)) { - if (from==PART_FROM_FACE) - (pa+(int)(lambda*size[a])*a0mul)->flag &= ~PARS_UNEXIST; - else - (pa+(int)(lambda*size[a])*a0mul)->hair_index++; - } - } - } - - if (from==PART_FROM_VOLUME) { - int in=pa->hair_index%2; - if (in) pa->hair_index++; - for (i=0; i<size[0]; i++) { - if (in || (pa+i*a0mul)->hair_index%2) - (pa+i*a0mul)->flag &= ~PARS_UNEXIST; - /* odd intersections == in->out / out->in */ - /* even intersections -> in stays same */ - in=(in + (pa+i*a0mul)->hair_index) % 2; - } - } - } - } - } - } - - if (psys->part->flag & PART_GRID_HEXAGONAL) { - for (i=0,p=0,pa=psys->particles; i<res; i++) { - for (j=0; j<res; j++) { - for (k=0; k<res; k++,p++,pa++) { - if (j%2) - pa->fuv[0] += d/2.f; - - if (k%2) { - pa->fuv[0] += d/2.f; - pa->fuv[1] += d/2.f; - } - } - } - } - } - - if (psys->part->flag & PART_GRID_INVERT) { - for (i=0; i<size[0]; i++) { - for (j=0; j<size[1]; j++) { - pa=psys->particles + res*(i*res + j); - for (k=0; k<size[2]; k++, pa++) { - pa->flag ^= PARS_UNEXIST; - } - } - } - } - - if (psys->part->grid_rand > 0.f) { - float rfac = d * psys->part->grid_rand; - for (p=0,pa=psys->particles; p<psys->totpart; p++,pa++) { - if (pa->flag & PARS_UNEXIST) - continue; - - pa->fuv[0] += rfac * (psys_frand(psys, p + 31) - 0.5f); - pa->fuv[1] += rfac * (psys_frand(psys, p + 32) - 0.5f); - pa->fuv[2] += rfac * (psys_frand(psys, p + 33) - 0.5f); - } - } -} - -/* modified copy from rayshade.c */ -static void hammersley_create(float *out, int n, int seed, float amount) -{ - RNG *rng; - double p, t, offs[2]; - int k, kk; - - rng = BLI_rng_new(31415926 + n + seed); - offs[0] = BLI_rng_get_double(rng) + (double)amount; - offs[1] = BLI_rng_get_double(rng) + (double)amount; - BLI_rng_free(rng); - - for (k = 0; k < n; k++) { - t = 0; - for (p = 0.5, kk = k; kk; p *= 0.5, kk >>= 1) - if (kk & 1) /* kk mod 2 = 1 */ - t += p; - - out[2*k + 0] = fmod((double)k/(double)n + offs[0], 1.0); - out[2*k + 1] = fmod(t + offs[1], 1.0); - } -} - -/* almost exact copy of BLI_jitter_init */ -static void init_mv_jit(float *jit, int num, int seed2, float amount) -{ - RNG *rng; - float *jit2, x, rad1, rad2, rad3; - int i, num2; - - if (num==0) return; - - rad1= (float)(1.0f/sqrtf((float)num)); - rad2= (float)(1.0f/((float)num)); - rad3= (float)sqrtf((float)num)/((float)num); - - rng = BLI_rng_new(31415926 + num + seed2); - x= 0; - num2 = 2 * num; - for (i=0; i<num2; i+=2) { - - jit[i] = x + amount*rad1*(0.5f - BLI_rng_get_float(rng)); - jit[i+1] = i/(2.0f*num) + amount*rad1*(0.5f - BLI_rng_get_float(rng)); - - jit[i]-= (float)floor(jit[i]); - jit[i+1]-= (float)floor(jit[i+1]); - - x+= rad3; - x -= (float)floor(x); - } - - jit2= MEM_mallocN(12 + 2*sizeof(float)*num, "initjit"); - - for (i=0 ; i<4 ; i++) { - BLI_jitterate1((float (*)[2])jit, (float (*)[2])jit2, num, rad1); - BLI_jitterate1((float (*)[2])jit, (float (*)[2])jit2, num, rad1); - BLI_jitterate2((float (*)[2])jit, (float (*)[2])jit2, num, rad2); - } - MEM_freeN(jit2); - BLI_rng_free(rng); -} - -static void psys_uv_to_w(float u, float v, int quad, float *w) -{ - float vert[4][3], co[3]; - - if (!quad) { - if (u+v > 1.0f) - v= 1.0f-v; - else - u= 1.0f-u; - } - - vert[0][0] = 0.0f; vert[0][1] = 0.0f; vert[0][2] = 0.0f; - vert[1][0] = 1.0f; vert[1][1] = 0.0f; vert[1][2] = 0.0f; - vert[2][0] = 1.0f; vert[2][1] = 1.0f; vert[2][2] = 0.0f; - - co[0] = u; - co[1] = v; - co[2] = 0.0f; - - if (quad) { - vert[3][0] = 0.0f; vert[3][1] = 1.0f; vert[3][2] = 0.0f; - interp_weights_poly_v3( w,vert, 4, co); - } - else { - interp_weights_poly_v3( w,vert, 3, co); - w[3] = 0.0f; - } -} - -/* Find the index in "sum" array before "value" is crossed. */ -static int distribute_binary_search(float *sum, int n, float value) -{ - int mid, low=0, high=n; - - if (value == 0.f) - return 0; - - while (low <= high) { - mid= (low + high)/2; - - if (sum[mid] < value && value <= sum[mid+1]) - return mid; - - if (sum[mid] >= value) - high= mid - 1; - else if (sum[mid] < value) - low= mid + 1; - else - return mid; - } - - return low; -} - -/* the max number if calls to rng_* funcs within psys_thread_distribute_particle - * be sure to keep up to date if this changes */ -#define PSYS_RND_DIST_SKIP 2 - -/* note: this function must be thread safe, for from == PART_FROM_CHILD */ -#define ONLY_WORKING_WITH_PA_VERTS 0 -static void distribute_threads_exec(ParticleTask *thread, ParticleData *pa, ChildParticle *cpa, int p) -{ - ParticleThreadContext *ctx= thread->ctx; - Object *ob= ctx->sim.ob; - DerivedMesh *dm= ctx->dm; - float *v1, *v2, *v3, *v4, nor[3], orco1[3], co1[3], co2[3], nor1[3]; - float cur_d, min_d, randu, randv; - int from= ctx->from; - int cfrom= ctx->cfrom; - int distr= ctx->distr; - int i, intersect, tot; - int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ - - if (from == PART_FROM_VERT) { - /* TODO_PARTICLE - use original index */ - pa->num= ctx->index[p]; - pa->fuv[0] = 1.0f; - pa->fuv[1] = pa->fuv[2] = pa->fuv[3] = 0.0; - -#if ONLY_WORKING_WITH_PA_VERTS - if (ctx->tree) { - KDTreeNearest ptn[3]; - int w, maxw; - - psys_particle_on_dm(ctx->dm,from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co1,0,0,0,orco1,0); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &orco1, 1, 1); - maxw = BLI_kdtree_find_nearest_n(ctx->tree,orco1,ptn,3); - - for (w=0; w<maxw; w++) { - pa->verts[w]=ptn->num; - } - } -#endif - } - else if (from == PART_FROM_FACE || from == PART_FROM_VOLUME) { - MFace *mface; - - pa->num = i = ctx->index[p]; - mface = dm->getTessFaceData(dm,i,CD_MFACE); - - switch (distr) { - case PART_DISTR_JIT: - if (ctx->jitlevel == 1) { - if (mface->v4) - psys_uv_to_w(0.5f, 0.5f, mface->v4, pa->fuv); - else - psys_uv_to_w(1.0f / 3.0f, 1.0f / 3.0f, mface->v4, pa->fuv); - } - else { - ctx->jitoff[i] = fmod(ctx->jitoff[i],(float)ctx->jitlevel); - if (!isnan(ctx->jitoff[i])) { - psys_uv_to_w(ctx->jit[2*(int)ctx->jitoff[i]], ctx->jit[2*(int)ctx->jitoff[i]+1], mface->v4, pa->fuv); - ctx->jitoff[i]++; - } - } - break; - case PART_DISTR_RAND: - randu= BLI_rng_get_float(thread->rng); - randv= BLI_rng_get_float(thread->rng); - rng_skip_tot -= 2; - - psys_uv_to_w(randu, randv, mface->v4, pa->fuv); - break; - } - pa->foffset= 0.0f; - - /* experimental */ - if (from==PART_FROM_VOLUME) { - MVert *mvert=dm->getVertDataArray(dm,CD_MVERT); - - tot=dm->getNumTessFaces(dm); - - psys_interpolate_face(mvert,mface,0,0,pa->fuv,co1,nor,0,0,0,0); - - normalize_v3(nor); - mul_v3_fl(nor,-100.0); - - add_v3_v3v3(co2,co1,nor); - - min_d=2.0; - intersect=0; - - for (i=0,mface=dm->getTessFaceDataArray(dm,CD_MFACE); i<tot; i++,mface++) { - if (i==pa->num) continue; - - v1=mvert[mface->v1].co; - v2=mvert[mface->v2].co; - v3=mvert[mface->v3].co; - - if (isect_line_tri_v3(co1, co2, v2, v3, v1, &cur_d, 0)) { - if (cur_d<min_d) { - min_d=cur_d; - pa->foffset=cur_d*50.0f; /* to the middle of volume */ - intersect=1; - } - } - if (mface->v4) { - v4=mvert[mface->v4].co; - - if (isect_line_tri_v3(co1, co2, v4, v1, v3, &cur_d, 0)) { - if (cur_d<min_d) { - min_d=cur_d; - pa->foffset=cur_d*50.0f; /* to the middle of volume */ - intersect=1; - } - } - } - } - if (intersect==0) - pa->foffset=0.0; - else { - switch (distr) { - case PART_DISTR_JIT: - pa->foffset *= ctx->jit[p % (2 * ctx->jitlevel)]; - break; - case PART_DISTR_RAND: - pa->foffset *= BLI_frand(); - break; - } - } - } - } - else if (from == PART_FROM_CHILD) { - MFace *mf; - - if (ctx->index[p] < 0) { - cpa->num=0; - cpa->fuv[0]=cpa->fuv[1]=cpa->fuv[2]=cpa->fuv[3]=0.0f; - cpa->pa[0]=cpa->pa[1]=cpa->pa[2]=cpa->pa[3]=0; - return; - } - - mf= dm->getTessFaceData(dm, ctx->index[p], CD_MFACE); - - randu= BLI_rng_get_float(thread->rng); - randv= BLI_rng_get_float(thread->rng); - rng_skip_tot -= 2; - - psys_uv_to_w(randu, randv, mf->v4, cpa->fuv); - - cpa->num = ctx->index[p]; - - if (ctx->tree) { - KDTreeNearest ptn[10]; - int w,maxw;//, do_seams; - float maxd /*, mind,dd */, totw= 0.0f; - int parent[10]; - float pweight[10]; - - psys_particle_on_dm(dm,cfrom,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,co1,nor1,NULL,NULL,orco1,NULL); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &orco1, 1, 1); - maxw = BLI_kdtree_find_nearest_n(ctx->tree,orco1,ptn,3); - - maxd=ptn[maxw-1].dist; - /* mind=ptn[0].dist; */ /* UNUSED */ - - /* the weights here could be done better */ - for (w=0; w<maxw; w++) { - parent[w]=ptn[w].index; - pweight[w]=(float)pow(2.0,(double)(-6.0f*ptn[w].dist/maxd)); - } - for (;w<10; w++) { - parent[w]=-1; - pweight[w]=0.0f; - } - - for (w=0,i=0; w<maxw && i<4; w++) { - if (parent[w]>=0) { - cpa->pa[i]=parent[w]; - cpa->w[i]=pweight[w]; - totw+=pweight[w]; - i++; - } - } - for (;i<4; i++) { - cpa->pa[i]=-1; - cpa->w[i]=0.0f; - } - - if (totw>0.0f) for (w=0; w<4; w++) - cpa->w[w]/=totw; - - cpa->parent=cpa->pa[0]; - } - } - - if (rng_skip_tot > 0) /* should never be below zero */ - BLI_rng_skip(thread->rng, rng_skip_tot); -} - -static void exec_distribute_parent(TaskPool *UNUSED(pool), void *taskdata, int UNUSED(threadid)) -{ - ParticleTask *task = taskdata; - ParticleSystem *psys= task->ctx->sim.psys; - ParticleData *pa; - int p; - - pa= psys->particles + task->begin; - for (p = task->begin; p < task->end; ++p, ++pa) - distribute_threads_exec(task, pa, NULL, p); -} - -static void exec_distribute_child(TaskPool *UNUSED(pool), void *taskdata, int UNUSED(threadid)) -{ - ParticleTask *task = taskdata; - ParticleSystem *psys = task->ctx->sim.psys; - ChildParticle *cpa; - int p; - - /* RNG skipping at the beginning */ - cpa = psys->child; - for (p = 0; p < task->begin; ++p, ++cpa) { - if (task->ctx->skip) /* simplification skip */ - BLI_rng_skip(task->rng, PSYS_RND_DIST_SKIP * task->ctx->skip[p]); - - BLI_rng_skip(task->rng, PSYS_RND_DIST_SKIP); - } - - for (; p < task->end; ++p, ++cpa) { - if (task->ctx->skip) /* simplification skip */ - BLI_rng_skip(task->rng, PSYS_RND_DIST_SKIP * task->ctx->skip[p]); - - distribute_threads_exec(task, NULL, cpa, p); - } -} - -static int distribute_compare_orig_index(const void *p1, const void *p2, void *user_data) -{ - int *orig_index = (int *) user_data; - int index1 = orig_index[*(const int *)p1]; - int index2 = orig_index[*(const int *)p2]; - - if (index1 < index2) - return -1; - else if (index1 == index2) { - /* this pointer comparison appears to make qsort stable for glibc, - * and apparently on solaris too, makes the renders reproducible */ - if (p1 < p2) - return -1; - else if (p1 == p2) - return 0; - else - return 1; - } - else - return 1; -} - -static void distribute_invalid(Scene *scene, ParticleSystem *psys, int from) -{ - if (from == PART_FROM_CHILD) { - ChildParticle *cpa; - int p, totchild = get_psys_tot_child(scene, psys); - - if (psys->child && totchild) { - for (p=0,cpa=psys->child; p<totchild; p++,cpa++) { - cpa->fuv[0]=cpa->fuv[1]=cpa->fuv[2]=cpa->fuv[3] = 0.0; - cpa->foffset= 0.0f; - cpa->parent=0; - cpa->pa[0]=cpa->pa[1]=cpa->pa[2]=cpa->pa[3]=0; - cpa->num= -1; - } - } - } - else { - PARTICLE_P; - LOOP_PARTICLES { - pa->fuv[0] = pa->fuv[1] = pa->fuv[2] = pa->fuv[3] = 0.0; - pa->foffset= 0.0f; - pa->num= -1; - } - } -} - -/* Creates a distribution of coordinates on a DerivedMesh */ -/* This is to denote functionality that does not yet work with mesh - only derived mesh */ -static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, ParticleSimulationData *sim, int from) -{ - Scene *scene = sim->scene; - DerivedMesh *finaldm = sim->psmd->dm; - Object *ob = sim->ob; - ParticleSystem *psys= sim->psys; - ParticleData *pa=0, *tpars= 0; - ParticleSettings *part; - ParticleSeam *seams= 0; - KDTree *tree=0; - DerivedMesh *dm= NULL; - float *jit= NULL; - int i, p=0; - int cfrom=0; - int totelem=0, totpart, *particle_element=0, children=0, totseam=0; - int jitlevel= 1, distr; - float *element_weight=NULL,*element_sum=NULL,*jitter_offset=NULL, *vweight=NULL; - float cur, maxweight=0.0, tweight, totweight, inv_totweight, co[3], nor[3], orco[3]; - - if (ELEM(NULL, ob, psys, psys->part)) - return 0; - - part=psys->part; - totpart=psys->totpart; - if (totpart==0) - return 0; - - if (!finaldm->deformedOnly && !finaldm->getTessFaceDataArray(finaldm, CD_ORIGINDEX)) { - printf("Can't create particles with the current modifier stack, disable destructive modifiers\n"); -// XXX error("Can't paint with the current modifier stack, disable destructive modifiers"); - return 0; - } - - psys_thread_context_init(ctx, sim); - - /* First handle special cases */ - if (from == PART_FROM_CHILD) { - /* Simple children */ - if (part->childtype != PART_CHILD_FACES) { - BLI_srandom(31415926 + psys->seed + psys->child_seed); - distribute_simple_children(scene, ob, finaldm, psys); - return 0; - } - } - else { - /* Grid distribution */ - if (part->distr==PART_DISTR_GRID && from != PART_FROM_VERT) { - BLI_srandom(31415926 + psys->seed); - dm= CDDM_from_mesh((Mesh*)ob->data); - DM_ensure_tessface(dm); - distribute_grid(dm,psys); - dm->release(dm); - return 0; - } - } - - /* Create trees and original coordinates if needed */ - if (from == PART_FROM_CHILD) { - distr=PART_DISTR_RAND; - BLI_srandom(31415926 + psys->seed + psys->child_seed); - dm= finaldm; - - /* BMESH ONLY */ - DM_ensure_tessface(dm); - - children=1; - - tree=BLI_kdtree_new(totpart); - - for (p=0,pa=psys->particles; p<totpart; p++,pa++) { - psys_particle_on_dm(dm,part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co,nor,0,0,orco,NULL); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &orco, 1, 1); - BLI_kdtree_insert(tree, p, orco); - } - - BLI_kdtree_balance(tree); - - totpart = get_psys_tot_child(scene, psys); - cfrom = from = PART_FROM_FACE; - } - else { - distr = part->distr; - BLI_srandom(31415926 + psys->seed); - - if (psys->part->use_modifier_stack) - dm = finaldm; - else - dm= CDDM_from_mesh((Mesh*)ob->data); - - /* BMESH ONLY, for verts we don't care about tessfaces */ - if (from != PART_FROM_VERT) { - DM_ensure_tessface(dm); - } - - /* we need orco for consistent distributions */ - if (!CustomData_has_layer(&dm->vertData, CD_ORCO)) - DM_add_vert_layer(dm, CD_ORCO, CD_ASSIGN, BKE_mesh_orco_verts_get(ob)); - - if (from == PART_FROM_VERT) { - MVert *mv= dm->getVertDataArray(dm, CD_MVERT); - float (*orcodata)[3] = dm->getVertDataArray(dm, CD_ORCO); - int totvert = dm->getNumVerts(dm); - - tree=BLI_kdtree_new(totvert); - - for (p=0; p<totvert; p++) { - if (orcodata) { - copy_v3_v3(co,orcodata[p]); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &co, 1, 1); - } - else - copy_v3_v3(co,mv[p].co); - BLI_kdtree_insert(tree, p, co); - } - - BLI_kdtree_balance(tree); - } - } - - /* Get total number of emission elements and allocate needed arrays */ - totelem = (from == PART_FROM_VERT) ? dm->getNumVerts(dm) : dm->getNumTessFaces(dm); - - if (totelem == 0) { - distribute_invalid(scene, psys, children ? PART_FROM_CHILD : 0); - - if (G.debug & G_DEBUG) - fprintf(stderr,"Particle distribution error: Nothing to emit from!\n"); - - if (dm != finaldm) dm->release(dm); - - BLI_kdtree_free(tree); - - return 0; - } - - element_weight = MEM_callocN(sizeof(float)*totelem, "particle_distribution_weights"); - particle_element= MEM_callocN(sizeof(int)*totpart, "particle_distribution_indexes"); - element_sum = MEM_callocN(sizeof(float)*(totelem+1), "particle_distribution_sum"); - jitter_offset = MEM_callocN(sizeof(float)*totelem, "particle_distribution_jitoff"); - - /* Calculate weights from face areas */ - if ((part->flag&PART_EDISTR || children) && from != PART_FROM_VERT) { - MVert *v1, *v2, *v3, *v4; - float totarea=0.f, co1[3], co2[3], co3[3], co4[3]; - float (*orcodata)[3]; - - orcodata= dm->getVertDataArray(dm, CD_ORCO); - - for (i=0; i<totelem; i++) { - MFace *mf=dm->getTessFaceData(dm,i,CD_MFACE); - - if (orcodata) { - copy_v3_v3(co1, orcodata[mf->v1]); - copy_v3_v3(co2, orcodata[mf->v2]); - copy_v3_v3(co3, orcodata[mf->v3]); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &co1, 1, 1); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &co2, 1, 1); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &co3, 1, 1); - if (mf->v4) { - copy_v3_v3(co4, orcodata[mf->v4]); - BKE_mesh_orco_verts_transform((Mesh*)ob->data, &co4, 1, 1); - } - } - else { - v1= (MVert*)dm->getVertData(dm,mf->v1,CD_MVERT); - v2= (MVert*)dm->getVertData(dm,mf->v2,CD_MVERT); - v3= (MVert*)dm->getVertData(dm,mf->v3,CD_MVERT); - copy_v3_v3(co1, v1->co); - copy_v3_v3(co2, v2->co); - copy_v3_v3(co3, v3->co); - if (mf->v4) { - v4= (MVert*)dm->getVertData(dm,mf->v4,CD_MVERT); - copy_v3_v3(co4, v4->co); - } - } - - cur = mf->v4 ? area_quad_v3(co1, co2, co3, co4) : area_tri_v3(co1, co2, co3); - - if (cur > maxweight) - maxweight = cur; - - element_weight[i] = cur; - totarea += cur; - } - - for (i=0; i<totelem; i++) - element_weight[i] /= totarea; - - maxweight /= totarea; - } - else { - float min=1.0f/(float)(MIN2(totelem,totpart)); - for (i=0; i<totelem; i++) - element_weight[i]=min; - maxweight=min; - } - - /* Calculate weights from vgroup */ - vweight = psys_cache_vgroup(dm,psys,PSYS_VG_DENSITY); - - if (vweight) { - if (from==PART_FROM_VERT) { - for (i=0;i<totelem; i++) - element_weight[i]*=vweight[i]; - } - else { /* PART_FROM_FACE / PART_FROM_VOLUME */ - for (i=0;i<totelem; i++) { - MFace *mf=dm->getTessFaceData(dm,i,CD_MFACE); - tweight = vweight[mf->v1] + vweight[mf->v2] + vweight[mf->v3]; - - if (mf->v4) { - tweight += vweight[mf->v4]; - tweight /= 4.0f; - } - else { - tweight /= 3.0f; - } - - element_weight[i]*=tweight; - } - } - MEM_freeN(vweight); - } - - /* Calculate total weight of all elements */ - totweight= 0.0f; - for (i=0;i<totelem; i++) - totweight += element_weight[i]; - - inv_totweight = (totweight > 0.f ? 1.f/totweight : 0.f); - - /* Calculate cumulative weights */ - element_sum[0] = 0.0f; - for (i=0; i<totelem; i++) - element_sum[i+1] = element_sum[i] + element_weight[i] * inv_totweight; - - /* Finally assign elements to particles */ - if ((part->flag&PART_TRAND) || (part->simplify_flag&PART_SIMPLIFY_ENABLE)) { - float pos; - - for (p=0; p<totpart; p++) { - /* In theory element_sum[totelem] should be 1.0, but due to float errors this is not necessarily always true, so scale pos accordingly. */ - pos= BLI_frand() * element_sum[totelem]; - particle_element[p] = distribute_binary_search(element_sum, totelem, pos); - particle_element[p] = MIN2(totelem-1, particle_element[p]); - jitter_offset[particle_element[p]] = pos; - } - } - else { - double step, pos; - - step= (totpart < 2) ? 0.5 : 1.0/(double)totpart; - pos= 1e-6; /* tiny offset to avoid zero weight face */ - i= 0; - - for (p=0; p<totpart; p++, pos+=step) { - while ((i < totelem) && (pos > (double)element_sum[i + 1])) - i++; - - particle_element[p] = MIN2(totelem-1, i); - - /* avoid zero weight face */ - if (p == totpart-1 && element_weight[particle_element[p]] == 0.0f) - particle_element[p] = particle_element[p-1]; - - jitter_offset[particle_element[p]] = pos; - } - } - - MEM_freeN(element_sum); - - /* For hair, sort by origindex (allows optimization's in rendering), */ - /* however with virtual parents the children need to be in random order. */ - if (part->type == PART_HAIR && !(part->childtype==PART_CHILD_FACES && part->parents!=0.0f)) { - int *orig_index = NULL; - - if (from == PART_FROM_VERT) { - if (dm->numVertData) - orig_index = dm->getVertDataArray(dm, CD_ORIGINDEX); - } - else { - if (dm->numTessFaceData) - orig_index = dm->getTessFaceDataArray(dm, CD_ORIGINDEX); - } - - if (orig_index) { - BLI_qsort_r(particle_element, totpart, sizeof(int), distribute_compare_orig_index, orig_index); - } - } - - /* Create jittering if needed */ - if (distr==PART_DISTR_JIT && ELEM(from,PART_FROM_FACE,PART_FROM_VOLUME)) { - jitlevel= part->userjit; - - if (jitlevel == 0) { - jitlevel= totpart/totelem; - if (part->flag & PART_EDISTR) jitlevel*= 2; /* looks better in general, not very scietific */ - if (jitlevel<3) jitlevel= 3; - } - - jit= MEM_callocN((2+ jitlevel*2)*sizeof(float), "jit"); - - /* for small amounts of particles we use regular jitter since it looks - * a bit better, for larger amounts we switch to hammersley sequence - * because it is much faster */ - if (jitlevel < 25) - init_mv_jit(jit, jitlevel, psys->seed, part->jitfac); - else - hammersley_create(jit, jitlevel+1, psys->seed, part->jitfac); - BLI_array_randomize(jit, 2*sizeof(float), jitlevel, psys->seed); /* for custom jit or even distribution */ - } - - /* Setup things for threaded distribution */ - ctx->tree= tree; - ctx->seams= seams; - ctx->totseam= totseam; - ctx->sim.psys= psys; - ctx->index= particle_element; - ctx->jit= jit; - ctx->jitlevel= jitlevel; - ctx->jitoff= jitter_offset; - ctx->weight= element_weight; - ctx->maxweight= maxweight; - ctx->from= (children) ? PART_FROM_CHILD : from; - ctx->cfrom= cfrom; - ctx->distr= distr; - ctx->dm= dm; - ctx->tpars= tpars; - - if (children) { - totpart= psys_render_simplify_distribution(ctx, totpart); - alloc_child_particles(psys, totpart); - } - - return 1; -} - -static void psys_task_init_distribute(ParticleTask *task, ParticleSimulationData *sim) -{ - /* init random number generator */ - int seed = 31415926 + sim->psys->seed; - - task->rng = BLI_rng_new(seed); -} - -static void distribute_particles_on_dm(ParticleSimulationData *sim, int from) -{ - TaskScheduler *task_scheduler; - TaskPool *task_pool; - ParticleThreadContext ctx; - ParticleTask *tasks; - DerivedMesh *finaldm = sim->psmd->dm; - int i, totpart, numtasks; - - /* create a task pool for distribution tasks */ - if (!psys_thread_context_init_distribute(&ctx, sim, from)) - return; - - task_scheduler = BLI_task_scheduler_get(); - task_pool = BLI_task_pool_create(task_scheduler, &ctx); - - totpart = (from == PART_FROM_CHILD ? sim->psys->totchild : sim->psys->totpart); - psys_tasks_create(&ctx, totpart, &tasks, &numtasks); - for (i = 0; i < numtasks; ++i) { - ParticleTask *task = &tasks[i]; - - psys_task_init_distribute(task, sim); - if (from == PART_FROM_CHILD) - BLI_task_pool_push(task_pool, exec_distribute_child, task, false, TASK_PRIORITY_LOW); - else - BLI_task_pool_push(task_pool, exec_distribute_parent, task, false, TASK_PRIORITY_LOW); - } - BLI_task_pool_work_and_wait(task_pool); - - BLI_task_pool_free(task_pool); - - psys_calc_dmcache(sim->ob, finaldm, sim->psys); - - if (ctx.dm != finaldm) - ctx.dm->release(ctx.dm); - - psys_tasks_free(tasks, numtasks); -} - -/* ready for future use, to emit particles without geometry */ -static void distribute_particles_on_shape(ParticleSimulationData *sim, int UNUSED(from)) -{ - distribute_invalid(sim->scene, sim->psys, 0); - - fprintf(stderr,"Shape emission not yet possible!\n"); -} - -static void distribute_particles(ParticleSimulationData *sim, int from) -{ - PARTICLE_PSMD; - int distr_error=0; - - if (psmd) { - if (psmd->dm) - distribute_particles_on_dm(sim, from); - else - distr_error=1; - } - else - distribute_particles_on_shape(sim, from); - - if (distr_error) { - distribute_invalid(sim->scene, sim->psys, from); - - fprintf(stderr,"Particle distribution error!\n"); - } -} - /* threaded child particle distribution and path caching */ void psys_thread_context_init(ParticleThreadContext *ctx, ParticleSimulationData *sim) { @@ -3930,7 +2883,7 @@ static void psys_update_path_cache(ParticleSimulationData *sim, float cfra) Base *base; int distr=0, alloc=0, skip=0; - if ((psys->part->childtype && psys->totchild != get_psys_tot_child(sim->scene, psys)) || psys->recalc&PSYS_RECALC_RESET) + if ((psys->part->childtype && psys->totchild != psys_get_tot_child(sim->scene, psys)) || psys->recalc&PSYS_RECALC_RESET) alloc=1; if (alloc || psys->recalc&PSYS_RECALC_CHILD || (psys->vgroup[PSYS_VG_DENSITY] && (sim->ob && sim->ob->mode & OB_MODE_WEIGHT_PAINT))) @@ -3940,7 +2893,7 @@ static void psys_update_path_cache(ParticleSimulationData *sim, float cfra) if (alloc) realloc_particles(sim, sim->psys->totpart); - if (get_psys_tot_child(sim->scene, psys)) { + if (psys_get_tot_child(sim->scene, psys)) { /* don't generate children while computing the hair keys */ if (!(psys->part->type == PART_HAIR) || (psys->flag & PSYS_HAIR_DONE)) { distribute_particles(sim, PART_FROM_CHILD); @@ -4600,7 +3553,7 @@ static void update_children(ParticleSimulationData *sim) /* don't generate children while growing hair - waste of time */ psys_free_children(sim->psys); else if (sim->psys->part->childtype) { - if (sim->psys->totchild != get_psys_tot_child(sim->scene, sim->psys)) + if (sim->psys->totchild != psys_get_tot_child(sim->scene, sim->psys)) distribute_particles(sim, PART_FROM_CHILD); else { /* Children are up to date, nothing to do. */ |