diff options
Diffstat (limited to 'source/blender/blenkernel/intern/particle_distribute.c')
| -rw-r--r-- | source/blender/blenkernel/intern/particle_distribute.c | 1448 |
1 files changed, 0 insertions, 1448 deletions
diff --git a/source/blender/blenkernel/intern/particle_distribute.c b/source/blender/blenkernel/intern/particle_distribute.c deleted file mode 100644 index 9185c0964b9..00000000000 --- a/source/blender/blenkernel/intern/particle_distribute.c +++ /dev/null @@ -1,1448 +0,0 @@ -/* - * ***** 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): Raul Fernandez Hernandez (Farsthary), - * Stephen Swhitehorn, - * Lukas Toenne - * - * ***** END GPL LICENSE BLOCK ***** - */ - -/** \file blender/blenkernel/intern/particle_distribute.c - * \ingroup bke - */ - -#include <string.h> - -#include "MEM_guardedalloc.h" - -#include "BLI_utildefines.h" -#include "BLI_jitter.h" -#include "BLI_kdtree.h" -#include "BLI_math.h" -#include "BLI_rand.h" -#include "BLI_sort.h" -#include "BLI_task.h" - -#include "DNA_mesh_types.h" -#include "DNA_meshdata_types.h" -#include "DNA_modifier_types.h" -#include "DNA_particle_types.h" -#include "DNA_scene_types.h" - -#include "BKE_cdderivedmesh.h" -#include "BKE_DerivedMesh.h" -#include "BKE_global.h" -#include "BKE_mesh.h" -#include "BKE_object.h" -#include "BKE_particle.h" - -static int psys_render_simplify_distribution(ParticleThreadContext *ctx, int tot); - -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"); - } -} - -static void distribute_simple_children(Scene *scene, Object *ob, DerivedMesh *finaldm, DerivedMesh *deformdm, ParticleSystem *psys) -{ - ChildParticle *cpa = NULL; - int i, p; - int child_nbr= psys_get_child_number(scene, psys); - int totpart= psys_get_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, deformdm, 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); - - bool intersects_tri = isect_axial_line_segment_tri_v3(a, co1, co2, v2, v3, v1, &lambda); - if (intersects_tri) { - 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++; - } - - if (mface->v4 && (!intersects_tri || from==PART_FROM_VOLUME)) { - copy_v3_v3(v4, mvert[mface->v4].co); - - if (isect_axial_line_segment_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_from_verts_exec(ParticleTask *thread, ParticleData *pa, int p) -{ - ParticleThreadContext *ctx= thread->ctx; - int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ - - /* 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 - - if (rng_skip_tot > 0) /* should never be below zero */ - BLI_rng_skip(thread->rng, rng_skip_tot); -} - -static void distribute_from_faces_exec(ParticleTask *thread, ParticleData *pa, int p) { - ParticleThreadContext *ctx= thread->ctx; - DerivedMesh *dm= ctx->dm; - float randu, randv; - int distr= ctx->distr; - int i; - int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ - - 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 { - float offset = fmod(ctx->jitoff[i] + (float)p, (float)ctx->jitlevel); - if (!isnan(offset)) { - psys_uv_to_w(ctx->jit[2*(int)offset], ctx->jit[2*(int)offset+1], mface->v4, pa->fuv); - } - } - 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; - - if (rng_skip_tot > 0) /* should never be below zero */ - BLI_rng_skip(thread->rng, rng_skip_tot); -} - -static void distribute_from_volume_exec(ParticleTask *thread, ParticleData *pa, int p) { - ParticleThreadContext *ctx= thread->ctx; - DerivedMesh *dm= ctx->dm; - float *v1, *v2, *v3, *v4, nor[3], co[3]; - float cur_d, min_d, randu, randv; - int distr= ctx->distr; - int i, intersect, tot; - int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ - - MFace *mface; - MVert *mvert=dm->getVertDataArray(dm,CD_MVERT); - - 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 { - float offset = fmod(ctx->jitoff[i] + (float)p, (float)ctx->jitlevel); - if (!isnan(offset)) { - psys_uv_to_w(ctx->jit[2*(int)offset], ctx->jit[2*(int)offset+1], mface->v4, pa->fuv); - } - } - 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 */ - tot=dm->getNumTessFaces(dm); - - psys_interpolate_face(mvert,mface,0,0,pa->fuv,co,nor,0,0,0,0); - - normalize_v3(nor); - negate_v3(nor); - - min_d=FLT_MAX; - 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_ray_tri_v3(co, nor, v2, v3, v1, &cur_d, NULL)) { - if (cur_d<min_d) { - min_d=cur_d; - pa->foffset=cur_d*0.5f; /* to the middle of volume */ - intersect=1; - } - } - if (mface->v4) { - v4=mvert[mface->v4].co; - - if (isect_ray_tri_v3(co, nor, v4, v1, v3, &cur_d, NULL)) { - if (cur_d<min_d) { - min_d=cur_d; - pa->foffset=cur_d*0.5f; /* 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; - } - } - - if (rng_skip_tot > 0) /* should never be below zero */ - BLI_rng_skip(thread->rng, rng_skip_tot); -} - -static void distribute_children_exec(ParticleTask *thread, ChildParticle *cpa, int p) { - ParticleThreadContext *ctx= thread->ctx; - Object *ob= ctx->sim.ob; - DerivedMesh *dm= ctx->dm; - float orco1[3], co1[3], nor1[3]; - float randu, randv; - int cfrom= ctx->cfrom; - int i; - int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ - - 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 * __restrict UNUSED(pool), void *taskdata, int UNUSED(threadid)) -{ - ParticleTask *task = taskdata; - ParticleSystem *psys= task->ctx->sim.psys; - ParticleData *pa; - int p; - - BLI_rng_skip(task->rng, PSYS_RND_DIST_SKIP * task->begin); - - pa= psys->particles + task->begin; - switch (psys->part->from) { - case PART_FROM_FACE: - for (p = task->begin; p < task->end; ++p, ++pa) - distribute_from_faces_exec(task, pa, p); - break; - case PART_FROM_VOLUME: - for (p = task->begin; p < task->end; ++p, ++pa) - distribute_from_volume_exec(task, pa, p); - break; - case PART_FROM_VERT: - for (p = task->begin; p < task->end; ++p, ++pa) - distribute_from_verts_exec(task, pa, p); - break; - } -} - -static void exec_distribute_child(TaskPool * __restrict 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_children_exec(task, 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 = psys_get_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_final; - 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; - } - - /* XXX This distribution code is totally broken in case from == PART_FROM_CHILD, it's always using finaldm - * even if use_modifier_stack is unset... But making things consistent here break all existing edited - * hair systems, so better wait for complete rewrite. - */ - - 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, sim->psmd->dm_deformed, psys); - return 0; - } - } - else { - /* Grid distribution */ - if (part->distr==PART_DISTR_GRID && from != PART_FROM_VERT) { - BLI_srandom(31415926 + psys->seed); - - if (psys->part->use_modifier_stack) { - dm = finaldm; - } - else { - dm = CDDM_from_mesh((Mesh*)ob->data); - } - DM_ensure_tessface(dm); - - distribute_grid(dm,psys); - - if (dm != finaldm) { - 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 = psys_get_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_mallocN(sizeof(*element_sum) * totelem, "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] = element_weight[0] * inv_totweight; - for (i = 1; i < totelem; i++) { - element_sum[i] = element_sum[i - 1] + 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 - 1]; - 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; - /* This is to address tricky issues with vertex-emitting when user tries (and expects) exact 1-1 vert/part - * distribution (see T47983 and its two example files). It allows us to consider pos as - * 'midpoint between v and v+1' (or 'p and p+1', depending whether we have more vertices than particles or not), - * and avoid stumbling over float imprecisions in element_sum. */ - if (from == PART_FROM_VERT) { - pos = (totpart < totelem) ? 0.5 / (double)totelem : step * 0.5; /* We choose the smaller step. */ - } - else { - pos = 0.0; - } - - /* Avoid initial zero-weight items. */ - for (i = 0; (element_sum[i] == 0.0) && (i < totelem - 1); i++); - - for (p = 0; p < totpart; p++, pos += step) { - for ( ; (pos > (double)element_sum[i]) && (i < totelem - 1); i++); - - particle_element[p] = i; - - jitter_offset[particle_element[p]] = pos; - } - - /* Avoid final zero weight items. */ - BLI_assert(p == totpart); - if (element_weight[particle_element[--p]] == 0.0f) { - particle_element[p] = particle_element[p - 1]; - } - } - - 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->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_final; - 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, 0, 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->psmd->dm_deformed, sim->psys); - - if (ctx.dm != finaldm) - ctx.dm->release(ctx.dm); - - psys_tasks_free(tasks, numtasks); - - psys_thread_context_free(&ctx); -} - -/* 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"); -} - -void distribute_particles(ParticleSimulationData *sim, int from) -{ - PARTICLE_PSMD; - int distr_error=0; - - if (psmd) { - if (psmd->dm_final) - 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"); - } -} - -/* ======== Simplify ======== */ - -static float psys_render_viewport_falloff(double rate, float dist, float width) -{ - return pow(rate, dist / width); -} - -static float psys_render_projected_area(ParticleSystem *psys, const float center[3], float area, double vprate, float *viewport) -{ - ParticleRenderData *data = psys->renderdata; - float co[4], view[3], ortho1[3], ortho2[3], w, dx, dy, radius; - - /* transform to view space */ - copy_v3_v3(co, center); - co[3] = 1.0f; - mul_m4_v4(data->viewmat, co); - - /* compute two vectors orthogonal to view vector */ - normalize_v3_v3(view, co); - ortho_basis_v3v3_v3(ortho1, ortho2, view); - - /* compute on screen minification */ - w = co[2] * data->winmat[2][3] + data->winmat[3][3]; - dx = data->winx * ortho2[0] * data->winmat[0][0]; - dy = data->winy * ortho2[1] * data->winmat[1][1]; - w = sqrtf(dx * dx + dy * dy) / w; - - /* w squared because we are working with area */ - area = area * w * w; - - /* viewport of the screen test */ - - /* project point on screen */ - mul_m4_v4(data->winmat, co); - if (co[3] != 0.0f) { - co[0] = 0.5f * data->winx * (1.0f + co[0] / co[3]); - co[1] = 0.5f * data->winy * (1.0f + co[1] / co[3]); - } - - /* screen space radius */ - radius = sqrtf(area / (float)M_PI); - - /* make smaller using fallof once over screen edge */ - *viewport = 1.0f; - - if (co[0] + radius < 0.0f) - *viewport *= psys_render_viewport_falloff(vprate, -(co[0] + radius), data->winx); - else if (co[0] - radius > data->winx) - *viewport *= psys_render_viewport_falloff(vprate, (co[0] - radius) - data->winx, data->winx); - - if (co[1] + radius < 0.0f) - *viewport *= psys_render_viewport_falloff(vprate, -(co[1] + radius), data->winy); - else if (co[1] - radius > data->winy) - *viewport *= psys_render_viewport_falloff(vprate, (co[1] - radius) - data->winy, data->winy); - - return area; -} - -/* BMESH_TODO, for orig face data, we need to use MPoly */ -static int psys_render_simplify_distribution(ParticleThreadContext *ctx, int tot) -{ - DerivedMesh *dm = ctx->dm; - Mesh *me = (Mesh *)(ctx->sim.ob->data); - MFace *mf, *mface; - MVert *mvert; - ParticleRenderData *data; - ParticleRenderElem *elems, *elem; - ParticleSettings *part = ctx->sim.psys->part; - float *facearea, (*facecenter)[3], size[3], fac, powrate, scaleclamp; - float co1[3], co2[3], co3[3], co4[3], lambda, arearatio, t, area, viewport; - double vprate; - int *facetotvert; - int a, b, totorigface, totface, newtot, skipped; - - /* double lookup */ - const int *index_mf_to_mpoly; - const int *index_mp_to_orig; - - if (part->ren_as != PART_DRAW_PATH || !(part->draw & PART_DRAW_REN_STRAND)) - return tot; - if (!ctx->sim.psys->renderdata) - return tot; - - data = ctx->sim.psys->renderdata; - if (data->timeoffset) - return 0; - if (!(part->simplify_flag & PART_SIMPLIFY_ENABLE)) - return tot; - - mvert = dm->getVertArray(dm); - mface = dm->getTessFaceArray(dm); - totface = dm->getNumTessFaces(dm); - totorigface = me->totpoly; - - if (totface == 0 || totorigface == 0) - return tot; - - index_mf_to_mpoly = dm->getTessFaceDataArray(dm, CD_ORIGINDEX); - index_mp_to_orig = dm->getPolyDataArray(dm, CD_ORIGINDEX); - if (index_mf_to_mpoly == NULL) { - index_mp_to_orig = NULL; - } - - facearea = MEM_callocN(sizeof(float) * totorigface, "SimplifyFaceArea"); - facecenter = MEM_callocN(sizeof(float[3]) * totorigface, "SimplifyFaceCenter"); - facetotvert = MEM_callocN(sizeof(int) * totorigface, "SimplifyFaceArea"); - elems = MEM_callocN(sizeof(ParticleRenderElem) * totorigface, "SimplifyFaceElem"); - - if (data->elems) - MEM_freeN(data->elems); - - data->do_simplify = true; - data->elems = elems; - data->index_mf_to_mpoly = index_mf_to_mpoly; - data->index_mp_to_orig = index_mp_to_orig; - - /* compute number of children per original face */ - for (a = 0; a < tot; a++) { - b = (index_mf_to_mpoly) ? DM_origindex_mface_mpoly(index_mf_to_mpoly, index_mp_to_orig, ctx->index[a]) : ctx->index[a]; - if (b != ORIGINDEX_NONE) { - elems[b].totchild++; - } - } - - /* compute areas and centers of original faces */ - for (mf = mface, a = 0; a < totface; a++, mf++) { - b = (index_mf_to_mpoly) ? DM_origindex_mface_mpoly(index_mf_to_mpoly, index_mp_to_orig, a) : a; - - if (b != ORIGINDEX_NONE) { - copy_v3_v3(co1, mvert[mf->v1].co); - copy_v3_v3(co2, mvert[mf->v2].co); - copy_v3_v3(co3, mvert[mf->v3].co); - - add_v3_v3(facecenter[b], co1); - add_v3_v3(facecenter[b], co2); - add_v3_v3(facecenter[b], co3); - - if (mf->v4) { - copy_v3_v3(co4, mvert[mf->v4].co); - add_v3_v3(facecenter[b], co4); - facearea[b] += area_quad_v3(co1, co2, co3, co4); - facetotvert[b] += 4; - } - else { - facearea[b] += area_tri_v3(co1, co2, co3); - facetotvert[b] += 3; - } - } - } - - for (a = 0; a < totorigface; a++) - if (facetotvert[a] > 0) - mul_v3_fl(facecenter[a], 1.0f / facetotvert[a]); - - /* for conversion from BU area / pixel area to reference screen size */ - BKE_mesh_texspace_get(me, 0, 0, size); - fac = ((size[0] + size[1] + size[2]) / 3.0f) / part->simplify_refsize; - fac = fac * fac; - - powrate = log(0.5f) / log(part->simplify_rate * 0.5f); - if (part->simplify_flag & PART_SIMPLIFY_VIEWPORT) - vprate = pow(1.0f - part->simplify_viewport, 5.0); - else - vprate = 1.0; - - /* set simplification parameters per original face */ - for (a = 0, elem = elems; a < totorigface; a++, elem++) { - area = psys_render_projected_area(ctx->sim.psys, facecenter[a], facearea[a], vprate, &viewport); - arearatio = fac * area / facearea[a]; - - if ((arearatio < 1.0f || viewport < 1.0f) && elem->totchild) { - /* lambda is percentage of elements to keep */ - lambda = (arearatio < 1.0f) ? powf(arearatio, powrate) : 1.0f; - lambda *= viewport; - - lambda = MAX2(lambda, 1.0f / elem->totchild); - - /* compute transition region */ - t = part->simplify_transition; - elem->t = (lambda - t < 0.0f) ? lambda : (lambda + t > 1.0f) ? 1.0f - lambda : t; - elem->reduce = 1; - - /* scale at end and beginning of the transition region */ - elem->scalemax = (lambda + t < 1.0f) ? 1.0f / lambda : 1.0f / (1.0f - elem->t * elem->t / t); - elem->scalemin = (lambda + t < 1.0f) ? 0.0f : elem->scalemax * (1.0f - elem->t / t); - - elem->scalemin = sqrtf(elem->scalemin); - elem->scalemax = sqrtf(elem->scalemax); - - /* clamp scaling */ - scaleclamp = (float)min_ii(elem->totchild, 10); - elem->scalemin = MIN2(scaleclamp, elem->scalemin); - elem->scalemax = MIN2(scaleclamp, elem->scalemax); - - /* extend lambda to include transition */ - lambda = lambda + elem->t; - if (lambda > 1.0f) - lambda = 1.0f; - } - else { - lambda = arearatio; - - elem->scalemax = 1.0f; //sqrt(lambda); - elem->scalemin = 1.0f; //sqrt(lambda); - elem->reduce = 0; - } - - elem->lambda = lambda; - elem->scalemin = sqrtf(elem->scalemin); - elem->scalemax = sqrtf(elem->scalemax); - elem->curchild = 0; - } - - MEM_freeN(facearea); - MEM_freeN(facecenter); - MEM_freeN(facetotvert); - - /* move indices and set random number skipping */ - ctx->skip = MEM_callocN(sizeof(int) * tot, "SimplificationSkip"); - - skipped = 0; - for (a = 0, newtot = 0; a < tot; a++) { - b = (index_mf_to_mpoly) ? DM_origindex_mface_mpoly(index_mf_to_mpoly, index_mp_to_orig, ctx->index[a]) : ctx->index[a]; - - if (b != ORIGINDEX_NONE) { - if (elems[b].curchild++ < ceil(elems[b].lambda * elems[b].totchild)) { - ctx->index[newtot] = ctx->index[a]; - ctx->skip[newtot] = skipped; - skipped = 0; - newtot++; - } - else skipped++; - } - else skipped++; - } - - for (a = 0, elem = elems; a < totorigface; a++, elem++) - elem->curchild = 0; - - return newtot; -} |