source/blender/blenkernel/intern/smoke.c

   1 /*
   2  * smoke.c
   3  *
   4  * $Id$
   5  *
   6  * ***** BEGIN GPL LICENSE BLOCK *****
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  *
  22  * The Original Code is Copyright (C) Blender Foundation.
  23  * All rights reserved.
  24  *
  25  * The Original Code is: all of this file.
  26  *
  27  * Contributor(s): Daniel Genrich
  28  *
  29  * ***** END GPL LICENSE BLOCK *****
  30  */
  31
  32 /** \file blender/blenkernel/intern/smoke.c
  33  *  \ingroup bke
  34  */
  35
  36
  37 /* Part of the code copied from elbeem fluid library, copyright by Nils Thuerey */
  38
  39 #include <GL/glew.h>
  40
  41 #include "MEM_guardedalloc.h"
  42
  43 #include <float.h>
  44 #include <math.h>
  45 #include <stdio.h>
  46 #include <string.h> /* memset */
  47
  48 #include "BLI_linklist.h"
  49 #include "BLI_rand.h"
  50 #include "BLI_jitter.h"
  51 #include "BLI_blenlib.h"
  52 #include "BLI_math.h"
  53 #include "BLI_edgehash.h"
  54 #include "BLI_kdtree.h"
  55 #include "BLI_kdopbvh.h"
  56 #include "BLI_utildefines.h"
  57
  58 #include "BKE_bvhutils.h"
  59 #include "BKE_cdderivedmesh.h"
  60 #include "BKE_customdata.h"
  61 #include "BKE_DerivedMesh.h"
  62 #include "BKE_effect.h"
  63 #include "BKE_modifier.h"
  64 #include "BKE_particle.h"
  65 #include "BKE_pointcache.h"
  66 #include "BKE_smoke.h"
  67
  68
  69 #include "DNA_customdata_types.h"
  70 #include "DNA_group_types.h"
  71 #include "DNA_lamp_types.h"
  72 #include "DNA_mesh_types.h"
  73 #include "DNA_meshdata_types.h"
  74 #include "DNA_modifier_types.h"
  75 #include "DNA_object_types.h"
  76 #include "DNA_particle_types.h"
  77 #include "DNA_scene_types.h"
  78 #include "DNA_smoke_types.h"
  79
  80 #include "smoke_API.h"
  81
  82 #include "BKE_smoke.h"
  83
  84 #ifdef _WIN32
  85 #include <time.h>
  86 #include <stdio.h>
  87 #include <conio.h>
  88 #include <windows.h>
  89
  90 static LARGE_INTEGER liFrequency;
  91 static LARGE_INTEGER liStartTime;
  92 static LARGE_INTEGER liCurrentTime;
  93
  94 static void tstart ( void )
  95 {
  96         QueryPerformanceFrequency ( &liFrequency );
  97         QueryPerformanceCounter ( &liStartTime );
  98 }
  99 static void tend ( void )
 100 {
 101         QueryPerformanceCounter ( &liCurrentTime );
 102 }
 103 static double tval( void )
 104 {
 105         return ((double)( (liCurrentTime.QuadPart - liStartTime.QuadPart)* (double)1000.0/(double)liFrequency.QuadPart ));
 106 }
 107 #else
 108 #include <sys/time.h>
 109 static struct timeval _tstart, _tend;
 110 static struct timezone tz;
 111 static void tstart ( void )
 112 {
 113         gettimeofday ( &_tstart, &tz );
 114 }
 115 static void tend ( void )
 116 {
 117         gettimeofday ( &_tend,&tz );
 118 }
 119
 120 #if 0 // unused
 121 static double tval()
 122 {
 123         double t1, t2;
 124         t1 = ( double ) _tstart.tv_sec*1000 + ( double ) _tstart.tv_usec/ ( 1000 );
 125         t2 = ( double ) _tend.tv_sec*1000 + ( double ) _tend.tv_usec/ ( 1000 );
 126         return t2-t1;
 127 }
 128 #endif
 129 #endif
 130
 131 struct Object;
 132 struct Scene;
 133 struct DerivedMesh;
 134 struct SmokeModifierData;
 135
 136 // forward declerations
 137 static void get_cell(float *p0, int res[3], float dx, float *pos, int *cell, int correct);
 138 void calcTriangleDivs(Object *ob, MVert *verts, int numverts, MFace *tris, int numfaces, int numtris, int **tridivs, float cell_len);
 139 static void fill_scs_points(Object *ob, DerivedMesh *dm, SmokeCollSettings *scs);
 140
 141 #define TRI_UVOFFSET (1./4.)
 142
 143 static int smokeModifier_init (SmokeModifierData *smd, Object *ob, Scene *scene, DerivedMesh *dm)
 144 {
 145         if((smd->type & MOD_SMOKE_TYPE_DOMAIN) && smd->domain && !smd->domain->fluid)
 146         {
 147                 size_t i;
 148                 float min[3] = {FLT_MAX, FLT_MAX, FLT_MAX}, max[3] = {-FLT_MAX, -FLT_MAX, -FLT_MAX};
 149                 float size[3];
 150                 MVert *verts = dm->getVertArray(dm);
 151                 float scale = 0.0;
 152                 int res;
 153
 154                 res = smd->domain->maxres;
 155
 156                 // get BB of domain
 157                 for(i = 0; i < dm->getNumVerts(dm); i++)
 158                 {
 159                         float tmp[3];
 160
 161                         VECCOPY(tmp, verts[i].co);
 162                         mul_m4_v3(ob->obmat, tmp);
 163
 164                         // min BB
 165                         min[0] = MIN2(min[0], tmp[0]);
 166                         min[1] = MIN2(min[1], tmp[1]);
 167                         min[2] = MIN2(min[2], tmp[2]);
 168
 169                         // max BB
 170                         max[0] = MAX2(max[0], tmp[0]);
 171                         max[1] = MAX2(max[1], tmp[1]);
 172                         max[2] = MAX2(max[2], tmp[2]);
 173                 }
 174
 175                 VECCOPY(smd->domain->p0, min);
 176                 VECCOPY(smd->domain->p1, max);
 177
 178                 // calc other res with max_res provided
 179                 VECSUB(size, max, min);
 180
 181                 // printf("size: %f, %f, %f\n", size[0], size[1], size[2]);
 182
 183                 // prevent crash when initializing a plane as domain
 184                 if((size[0] < FLT_EPSILON) || (size[1] < FLT_EPSILON) || (size[2] < FLT_EPSILON))
 185                         return 0;
 186
 187                 if(size[0] > size[1])
 188                 {
 189                         if(size[0] > size[2])
 190                         {
 191                                 scale = res / size[0];
 192                                 smd->domain->dx = size[0] / res;
 193                                 smd->domain->res[0] = res;
 194                                 smd->domain->res[1] = (int)(size[1] * scale + 0.5);
 195                                 smd->domain->res[2] = (int)(size[2] * scale + 0.5);
 196                         }
 197                         else
 198                         {
 199                                 scale = res / size[2];
 200                                 smd->domain->dx = size[2] / res;
 201                                 smd->domain->res[2] = res;
 202                                 smd->domain->res[0] = (int)(size[0] * scale + 0.5);
 203                                 smd->domain->res[1] = (int)(size[1] * scale + 0.5);
 204                         }
 205                 }
 206                 else
 207                 {
 208                         if(size[1] > size[2])
 209                         {
 210                                 scale = res / size[1];
 211                                 smd->domain->dx = size[1] / res;
 212                                 smd->domain->res[1] = res;
 213                                 smd->domain->res[0] = (int)(size[0] * scale + 0.5);
 214                                 smd->domain->res[2] = (int)(size[2] * scale + 0.5);
 215                         }
 216                         else
 217                         {
 218                                 scale = res / size[2];
 219                                 smd->domain->dx = size[2] / res;
 220                                 smd->domain->res[2] = res;
 221                                 smd->domain->res[0] = (int)(size[0] * scale + 0.5);
 222                                 smd->domain->res[1] = (int)(size[1] * scale + 0.5);
 223                         }
 224                 }
 225
 226                 // printf("smd->domain->dx: %f\n", smd->domain->dx);
 227
 228                 // TODO: put in failsafe if res<=0 - dg
 229
 230                 // printf("res[0]: %d, res[1]: %d, res[2]: %d\n", smd->domain->res[0], smd->domain->res[1], smd->domain->res[2]);
 231                 // dt max is 0.1
 232                 smd->domain->fluid = smoke_init(smd->domain->res, smd->domain->p0);
 233                 smd->time = scene->r.cfra;
 234
 235                 if(smd->domain->flags & MOD_SMOKE_HIGHRES)
 236                 {
 237                         smd->domain->wt = smoke_turbulence_init(smd->domain->res, smd->domain->amplify + 1, smd->domain->noise);
 238                         smd->domain->res_wt[0] = smd->domain->res[0] * (smd->domain->amplify + 1);
 239                         smd->domain->res_wt[1] = smd->domain->res[1] * (smd->domain->amplify + 1);
 240                         smd->domain->res_wt[2] = smd->domain->res[2] * (smd->domain->amplify + 1);
 241                         smd->domain->dx_wt = smd->domain->dx / (smd->domain->amplify + 1);
 242                         // printf("smd->domain->amplify: %d\n",  smd->domain->amplify);
 243                         // printf("(smd->domain->flags & MOD_SMOKE_HIGHRES)\n");
 244                 }
 245
 246                 if(!smd->domain->shadow)
 247                         smd->domain->shadow = MEM_callocN(sizeof(float) * smd->domain->res[0] * smd->domain->res[1] * smd->domain->res[2], "SmokeDomainShadow");
 248
 249                 smoke_initBlenderRNA(smd->domain->fluid, &(smd->domain->alpha), &(smd->domain->beta), &(smd->domain->time_scale), &(smd->domain->vorticity), &(smd->domain->border_collisions));
 250
 251                 if(smd->domain->wt)
 252                 {
 253                         smoke_initWaveletBlenderRNA(smd->domain->wt, &(smd->domain->strength));
 254                         // printf("smoke_initWaveletBlenderRNA\n");
 255                 }
 256                 return 1;
 257         }
 258         else if((smd->type & MOD_SMOKE_TYPE_FLOW) && smd->flow)
 259         {
 260                 // handle flow object here
 261                 // XXX TODO
 262
 263                 smd->time = scene->r.cfra;
 264
 265                 // update particle lifetime to be one frame
 266                 // smd->flow->psys->part->lifetime = scene->r.efra + 1;
 267 /*
 268                 if(!smd->flow->bvh)
 269                 {
 270                         // smd->flow->bvh = MEM_callocN(sizeof(BVHTreeFromMesh), "smoke_bvhfromfaces");
 271                         // bvhtree_from_mesh_faces(smd->flow->bvh, dm, 0.0, 2, 6);
 272
 273                         // copy obmat
 274                         // copy_m4_m4(smd->flow->mat, ob->obmat);
 275                         // copy_m4_m4(smd->flow->mat_old, ob->obmat);
 276                 }
 277 */
 278
 279                 return 1;
 280         }
 281         else if((smd->type & MOD_SMOKE_TYPE_COLL))
 282         {
 283                 smd->time = scene->r.cfra;
 284
 285                 // todo: delete this when loading colls work -dg
 286                 if(!smd->coll)
 287                         smokeModifier_createType(smd);
 288
 289                 if(!smd->coll->points)
 290                 {
 291                         // init collision points
 292                         SmokeCollSettings *scs = smd->coll;
 293
 294                         // copy obmat
 295                         copy_m4_m4(scs->mat, ob->obmat);
 296                         copy_m4_m4(scs->mat_old, ob->obmat);
 297
 298                         fill_scs_points(ob, dm, scs);
 299                 }
 300
 301                 if(!smd->coll->bvhtree)
 302                 {
 303                         smd->coll->bvhtree = NULL; // bvhtree_build_from_smoke ( ob->obmat, dm->getFaceArray(dm), dm->getNumFaces(dm), dm->getVertArray(dm), dm->getNumVerts(dm), 0.0 );
 304                 }
 305                 return 1;
 306         }
 307
 308         return 2;
 309 }
 310
 311 static void fill_scs_points(Object *ob, DerivedMesh *dm, SmokeCollSettings *scs)
 312 {
 313         MVert *mvert = dm->getVertArray(dm);
 314         MFace *mface = dm->getFaceArray(dm);
 315         int i = 0, divs = 0;
 316         int *tridivs = NULL;
 317         float cell_len = 1.0 / 50.0; // for res = 50
 318         int newdivs = 0;
 319         int quads = 0, facecounter = 0;
 320
 321         // count quads
 322         for(i = 0; i < dm->getNumFaces(dm); i++)
 323         {
 324                 if(mface[i].v4)
 325                         quads++;
 326         }
 327
 328         calcTriangleDivs(ob, mvert, dm->getNumVerts(dm), mface,  dm->getNumFaces(dm), dm->getNumFaces(dm) + quads, &tridivs, cell_len);
 329
 330         // count triangle divisions
 331         for(i = 0; i < dm->getNumFaces(dm) + quads; i++)
 332         {
 333                 divs += (tridivs[3 * i] + 1) * (tridivs[3 * i + 1] + 1) * (tridivs[3 * i + 2] + 1);
 334         }
 335
 336         // printf("divs: %d\n", divs);
 337
 338         scs->points = MEM_callocN(sizeof(float) * (dm->getNumVerts(dm) + divs) * 3, "SmokeCollPoints");
 339
 340         for(i = 0; i < dm->getNumVerts(dm); i++)
 341         {
 342                 float tmpvec[3];
 343                 VECCOPY(tmpvec, mvert[i].co);
 344                 mul_m4_v3(ob->obmat, tmpvec);
 345                 VECCOPY(&scs->points[i * 3], tmpvec);
 346         }
 347
 348         for(i = 0, facecounter = 0; i < dm->getNumFaces(dm); i++)
 349         {
 350                 int again = 0;
 351                 do
 352                 {
 353                         int j, k;
 354                         int divs1 = tridivs[3 * facecounter + 0];
 355                         int divs2 = tridivs[3 * facecounter + 1];
 356                         //int divs3 = tridivs[3 * facecounter + 2];
 357                         float side1[3], side2[3], trinormorg[3], trinorm[3];
 358
 359                         if(again == 1 && mface[i].v4)
 360                         {
 361                                 VECSUB(side1,  mvert[ mface[i].v3 ].co, mvert[ mface[i].v1 ].co);
 362                                 VECSUB(side2,  mvert[ mface[i].v4 ].co, mvert[ mface[i].v1 ].co);
 363                         }
 364                         else
 365                         {
 366                                 VECSUB(side1,  mvert[ mface[i].v2 ].co, mvert[ mface[i].v1 ].co);
 367                                 VECSUB(side2,  mvert[ mface[i].v3 ].co, mvert[ mface[i].v1 ].co);
 368                         }
 369
 370                         cross_v3_v3v3(trinormorg, side1, side2);
 371                         normalize_v3(trinormorg);
 372                         VECCOPY(trinorm, trinormorg);
 373                         mul_v3_fl(trinorm, 0.25 * cell_len);
 374
 375                         for(j = 0; j <= divs1; j++)
 376                         {
 377                                 for(k = 0; k <= divs2; k++)
 378                                 {
 379                                         float p1[3], p2[3], p3[3], p[3]={0,0,0};
 380                                         const float uf = (float)(j + TRI_UVOFFSET) / (float)(divs1 + 0.0);
 381                                         const float vf = (float)(k + TRI_UVOFFSET) / (float)(divs2 + 0.0);
 382                                         float tmpvec[3];
 383
 384                                         if(uf+vf > 1.0)
 385                                         {
 386                                                 // printf("bigger - divs1: %d, divs2: %d\n", divs1, divs2);
 387                                                 continue;
 388                                         }
 389
 390                                         VECCOPY(p1, mvert[ mface[i].v1 ].co);
 391                                         if(again == 1 && mface[i].v4)
 392                                         {
 393                                                 VECCOPY(p2, mvert[ mface[i].v3 ].co);
 394                                                 VECCOPY(p3, mvert[ mface[i].v4 ].co);
 395                                         }
 396                                         else
 397                                         {
 398                                                 VECCOPY(p2, mvert[ mface[i].v2 ].co);
 399                                                 VECCOPY(p3, mvert[ mface[i].v3 ].co);
 400                                         }
 401
 402                                         mul_v3_fl(p1, (1.0-uf-vf));
 403                                         mul_v3_fl(p2, uf);
 404                                         mul_v3_fl(p3, vf);
 405
 406                                         VECADD(p, p1, p2);
 407                                         VECADD(p, p, p3);
 408
 409                                         if(newdivs > divs)
 410                                                 printf("mem problem\n");
 411
 412                                         // mMovPoints.push_back(p + trinorm);
 413                                         VECCOPY(tmpvec, p);
 414                                         VECADD(tmpvec, tmpvec, trinorm);
 415                                         mul_m4_v3(ob->obmat, tmpvec);
 416                                         VECCOPY(&scs->points[3 * (dm->getNumVerts(dm) + newdivs)], tmpvec);
 417                                         newdivs++;
 418
 419                                         if(newdivs > divs)
 420                                                 printf("mem problem\n");
 421
 422                                         // mMovPoints.push_back(p - trinorm);
 423                                         VECCOPY(tmpvec, p);
 424                                         VECSUB(tmpvec, tmpvec, trinorm);
 425                                         mul_m4_v3(ob->obmat, tmpvec);
 426                                         VECCOPY(&scs->points[3 * (dm->getNumVerts(dm) + newdivs)], tmpvec);
 427                                         newdivs++;
 428                                 }
 429                         }
 430
 431                         if(again == 0 && mface[i].v4)
 432                                 again++;
 433                         else
 434                                 again = 0;
 435
 436                         facecounter++;
 437
 438                 } while(again!=0);
 439         }
 440
 441         scs->numpoints = dm->getNumVerts(dm) + newdivs;
 442
 443         MEM_freeN(tridivs);
 444 }
 445
 446 /*! init triangle divisions */
 447 void calcTriangleDivs(Object *ob, MVert *verts, int UNUSED(numverts), MFace *faces, int numfaces, int numtris, int **tridivs, float cell_len)
 448 {
 449         // mTriangleDivs1.resize( faces.size() );
 450         // mTriangleDivs2.resize( faces.size() );
 451         // mTriangleDivs3.resize( faces.size() );
 452
 453         size_t i = 0, facecounter = 0;
 454         float maxscale[3] = {1,1,1}; // = channelFindMaxVf(mcScale);
 455         float maxpart = ABS(maxscale[0]);
 456         float scaleFac = 0;
 457         float fsTri = 0;
 458         if(ABS(maxscale[1])>maxpart) maxpart = ABS(maxscale[1]);
 459         if(ABS(maxscale[2])>maxpart) maxpart = ABS(maxscale[2]);
 460         scaleFac = 1.0 / maxpart;
 461         // featureSize = mLevel[mMaxRefine].nodeSize
 462         fsTri = cell_len * 0.5 * scaleFac;
 463
 464         if(*tridivs)
 465                 MEM_freeN(*tridivs);
 466
 467         *tridivs = MEM_callocN(sizeof(int) * numtris * 3, "Smoke_Tridivs");
 468
 469         for(i = 0, facecounter = 0; i < numfaces; i++)
 470         {
 471                 float p0[3], p1[3], p2[3];
 472                 float side1[3];
 473                 float side2[3];
 474                 float side3[3];
 475                 int divs1=0, divs2=0, divs3=0;
 476
 477                 VECCOPY(p0, verts[faces[i].v1].co);
 478                 mul_m4_v3(ob->obmat, p0);
 479                 VECCOPY(p1, verts[faces[i].v2].co);
 480                 mul_m4_v3(ob->obmat, p1);
 481                 VECCOPY(p2, verts[faces[i].v3].co);
 482                 mul_m4_v3(ob->obmat, p2);
 483
 484                 VECSUB(side1, p1, p0);
 485                 VECSUB(side2, p2, p0);
 486                 VECSUB(side3, p1, p2);
 487
 488                 if(INPR(side1, side1) > fsTri*fsTri)
 489                 {
 490                         float tmp = normalize_v3(side1);
 491                         divs1 = (int)ceil(tmp/fsTri);
 492                 }
 493                 if(INPR(side2, side2) > fsTri*fsTri)
 494                 {
 495                         float tmp = normalize_v3(side2);
 496                         divs2 = (int)ceil(tmp/fsTri);
 497
 498                         /*
 499                         // debug
 500                         if(i==0)
 501                                 printf("b tmp: %f, fsTri: %f, divs2: %d\n", tmp, fsTri, divs2);
 502                         */
 503                 }
 504
 505                 (*tridivs)[3 * facecounter + 0] = divs1;
 506                 (*tridivs)[3 * facecounter + 1] = divs2;
 507                 (*tridivs)[3 * facecounter + 2] = divs3;
 508
 509                 // TODO quad case
 510                 if(faces[i].v4)
 511                 {
 512                         divs1=0, divs2=0, divs3=0;
 513
 514                         facecounter++;
 515
 516                         VECCOPY(p0, verts[faces[i].v3].co);
 517                         mul_m4_v3(ob->obmat, p0);
 518                         VECCOPY(p1, verts[faces[i].v4].co);
 519                         mul_m4_v3(ob->obmat, p1);
 520                         VECCOPY(p2, verts[faces[i].v1].co);
 521                         mul_m4_v3(ob->obmat, p2);
 522
 523                         VECSUB(side1, p1, p0);
 524                         VECSUB(side2, p2, p0);
 525                         VECSUB(side3, p1, p2);
 526
 527                         if(INPR(side1, side1) > fsTri*fsTri)
 528                         {
 529                                 float tmp = normalize_v3(side1);
 530                                 divs1 = (int)ceil(tmp/fsTri);
 531                         }
 532                         if(INPR(side2, side2) > fsTri*fsTri)
 533                         {
 534                                 float tmp = normalize_v3(side2);
 535                                 divs2 = (int)ceil(tmp/fsTri);
 536                         }
 537
 538                         (*tridivs)[3 * facecounter + 0] = divs1;
 539                         (*tridivs)[3 * facecounter + 1] = divs2;
 540                         (*tridivs)[3 * facecounter + 2] = divs3;
 541                 }
 542                 facecounter++;
 543         }
 544 }
 545
 546 static void smokeModifier_freeDomain(SmokeModifierData *smd)
 547 {
 548         if(smd->domain)
 549         {
 550                 if(smd->domain->shadow)
 551                                 MEM_freeN(smd->domain->shadow);
 552                         smd->domain->shadow = NULL;
 553
 554                 if(smd->domain->fluid)
 555                         smoke_free(smd->domain->fluid);
 556
 557                 if(smd->domain->wt)
 558                         smoke_turbulence_free(smd->domain->wt);
 559
 560                 if(smd->domain->effector_weights)
 561                                 MEM_freeN(smd->domain->effector_weights);
 562                 smd->domain->effector_weights = NULL;
 563
 564                 BKE_ptcache_free_list(&(smd->domain->ptcaches[0]));
 565                 smd->domain->point_cache[0] = NULL;
 566
 567                 MEM_freeN(smd->domain);
 568                 smd->domain = NULL;
 569         }
 570 }
 571
 572 static void smokeModifier_freeFlow(SmokeModifierData *smd)
 573 {
 574         if(smd->flow)
 575         {
 576 /*
 577                 if(smd->flow->bvh)
 578                 {
 579                         free_bvhtree_from_mesh(smd->flow->bvh);
 580                         MEM_freeN(smd->flow->bvh);
 581                 }
 582                 smd->flow->bvh = NULL;
 583 */
 584                 MEM_freeN(smd->flow);
 585                 smd->flow = NULL;
 586         }
 587 }
 588
 589 static void smokeModifier_freeCollision(SmokeModifierData *smd)
 590 {
 591         if(smd->coll)
 592         {
 593                 if(smd->coll->points)
 594                 {
 595                         MEM_freeN(smd->coll->points);
 596                         smd->coll->points = NULL;
 597                 }
 598
 599                 if(smd->coll->bvhtree)
 600                 {
 601                         BLI_bvhtree_free(smd->coll->bvhtree);
 602                         smd->coll->bvhtree = NULL;
 603                 }
 604
 605                 if(smd->coll->dm)
 606                         smd->coll->dm->release(smd->coll->dm);
 607                 smd->coll->dm = NULL;
 608
 609                 MEM_freeN(smd->coll);
 610                 smd->coll = NULL;
 611         }
 612 }
 613
 614 void smokeModifier_reset_turbulence(struct SmokeModifierData *smd)
 615 {
 616         if(smd && smd->domain && smd->domain->wt)
 617         {
 618                 smoke_turbulence_free(smd->domain->wt);
 619                 smd->domain->wt = NULL;
 620         }
 621 }
 622
 623 void smokeModifier_reset(struct SmokeModifierData *smd)
 624 {
 625         if(smd)
 626         {
 627                 if(smd->domain)
 628                 {
 629                         if(smd->domain->shadow)
 630                                 MEM_freeN(smd->domain->shadow);
 631                         smd->domain->shadow = NULL;
 632
 633                         if(smd->domain->fluid)
 634                         {
 635                                 smoke_free(smd->domain->fluid);
 636                                 smd->domain->fluid = NULL;
 637                         }
 638
 639                         smokeModifier_reset_turbulence(smd);
 640
 641                         smd->time = -1;
 642
 643                         // printf("reset domain end\n");
 644                 }
 645                 else if(smd->flow)
 646                 {
 647                         /*
 648                         if(smd->flow->bvh)
 649                         {
 650                                 free_bvhtree_from_mesh(smd->flow->bvh);
 651                                 MEM_freeN(smd->flow->bvh);
 652                         }
 653                         smd->flow->bvh = NULL;
 654                         */
 655                 }
 656                 else if(smd->coll)
 657                 {
 658                         if(smd->coll->points)
 659                         {
 660                                 MEM_freeN(smd->coll->points);
 661                                 smd->coll->points = NULL;
 662                         }
 663
 664                         if(smd->coll->bvhtree)
 665                         {
 666                                 BLI_bvhtree_free(smd->coll->bvhtree);
 667                                 smd->coll->bvhtree = NULL;
 668                         }
 669
 670                         if(smd->coll->dm)
 671                                 smd->coll->dm->release(smd->coll->dm);
 672                         smd->coll->dm = NULL;
 673
 674                 }
 675         }
 676 }
 677
 678 void smokeModifier_free (SmokeModifierData *smd)
 679 {
 680         if(smd)
 681         {
 682                 smokeModifier_freeDomain(smd);
 683                 smokeModifier_freeFlow(smd);
 684                 smokeModifier_freeCollision(smd);
 685         }
 686 }
 687
 688 void smokeModifier_createType(struct SmokeModifierData *smd)
 689 {
 690         if(smd)
 691         {
 692                 if(smd->type & MOD_SMOKE_TYPE_DOMAIN)
 693                 {
 694                         if(smd->domain)
 695                                 smokeModifier_freeDomain(smd);
 696
 697                         smd->domain = MEM_callocN(sizeof(SmokeDomainSettings), "SmokeDomain");
 698
 699                         smd->domain->smd = smd;
 700
 701                         smd->domain->point_cache[0] = BKE_ptcache_add(&(smd->domain->ptcaches[0]));
 702                         smd->domain->point_cache[0]->flag |= PTCACHE_DISK_CACHE;
 703                         smd->domain->point_cache[0]->step = 1;
 704
 705                         /* Deprecated */
 706                         smd->domain->point_cache[1] = NULL;
 707                         smd->domain->ptcaches[1].first = smd->domain->ptcaches[1].last = NULL;
 708                         /* set some standard values */
 709                         smd->domain->fluid = NULL;
 710                         smd->domain->wt = NULL;
 711                         smd->domain->eff_group = NULL;
 712                         smd->domain->fluid_group = NULL;
 713                         smd->domain->coll_group = NULL;
 714                         smd->domain->maxres = 32;
 715                         smd->domain->amplify = 1;
 716                         smd->domain->omega = 1.0;
 717                         smd->domain->alpha = -0.001;
 718                         smd->domain->beta = 0.1;
 719                         smd->domain->time_scale = 1.0;
 720                         smd->domain->vorticity = 2.0;
 721                         smd->domain->border_collisions = 1;             // vertically non-colliding
 722                         smd->domain->flags = MOD_SMOKE_DISSOLVE_LOG | MOD_SMOKE_HIGH_SMOOTH;
 723                         smd->domain->strength = 2.0;
 724                         smd->domain->noise = MOD_SMOKE_NOISEWAVE;
 725                         smd->domain->diss_speed = 5;
 726                         // init 3dview buffer
 727
 728                         smd->domain->viewsettings = MOD_SMOKE_VIEW_SHOWBIG;
 729                         smd->domain->effector_weights = BKE_add_effector_weights(NULL);
 730                 }
 731                 else if(smd->type & MOD_SMOKE_TYPE_FLOW)
 732                 {
 733                         if(smd->flow)
 734                                 smokeModifier_freeFlow(smd);
 735
 736                         smd->flow = MEM_callocN(sizeof(SmokeFlowSettings), "SmokeFlow");
 737
 738                         smd->flow->smd = smd;
 739
 740                         /* set some standard values */
 741                         smd->flow->density = 1.0;
 742                         smd->flow->temp = 1.0;
 743                         smd->flow->flags = MOD_SMOKE_FLOW_ABSOLUTE;
 744                         smd->flow->vel_multi = 1.0;
 745
 746                         smd->flow->psys = NULL;
 747
 748                 }
 749                 else if(smd->type & MOD_SMOKE_TYPE_COLL)
 750                 {
 751                         if(smd->coll)
 752                                 smokeModifier_freeCollision(smd);
 753
 754                         smd->coll = MEM_callocN(sizeof(SmokeCollSettings), "SmokeColl");
 755
 756                         smd->coll->smd = smd;
 757                         smd->coll->points = NULL;
 758                         smd->coll->numpoints = 0;
 759                         smd->coll->bvhtree = NULL;
 760                         smd->coll->dm = NULL;
 761                 }
 762         }
 763 }
 764
 765 void smokeModifier_copy(struct SmokeModifierData *smd, struct SmokeModifierData *tsmd)
 766 {
 767         tsmd->type = smd->type;
 768         tsmd->time = smd->time;
 769
 770         smokeModifier_createType(tsmd);
 771
 772         if (tsmd->domain) {
 773                 tsmd->domain->maxres = smd->domain->maxres;
 774                 tsmd->domain->amplify = smd->domain->amplify;
 775                 tsmd->domain->omega = smd->domain->omega;
 776                 tsmd->domain->alpha = smd->domain->alpha;
 777                 tsmd->domain->beta = smd->domain->beta;
 778                 tsmd->domain->flags = smd->domain->flags;
 779                 tsmd->domain->strength = smd->domain->strength;
 780                 tsmd->domain->noise = smd->domain->noise;
 781                 tsmd->domain->diss_speed = smd->domain->diss_speed;
 782                 tsmd->domain->viewsettings = smd->domain->viewsettings;
 783                 tsmd->domain->fluid_group = smd->domain->fluid_group;
 784                 tsmd->domain->coll_group = smd->domain->coll_group;
 785                 tsmd->domain->vorticity = smd->domain->vorticity;
 786                 tsmd->domain->time_scale = smd->domain->time_scale;
 787                 tsmd->domain->border_collisions = smd->domain->border_collisions;
 788
 789                 MEM_freeN(tsmd->domain->effector_weights);
 790                 tsmd->domain->effector_weights = MEM_dupallocN(smd->domain->effector_weights);
 791         } else if (tsmd->flow) {
 792                 tsmd->flow->density = smd->flow->density;
 793                 tsmd->flow->temp = smd->flow->temp;
 794                 tsmd->flow->psys = smd->flow->psys;
 795                 tsmd->flow->type = smd->flow->type;
 796                 tsmd->flow->flags = smd->flow->flags;
 797                 tsmd->flow->vel_multi = smd->flow->vel_multi;
 798         } else if (tsmd->coll) {
 799                 ;
 800                 /* leave it as initialised, collision settings is mostly caches */
 801         }
 802 }
 803
 804
 805 // forward decleration
 806 static void smoke_calc_transparency(float *result, float *input, float *p0, float *p1, int res[3], float dx, float *light, bresenham_callback cb, float correct);
 807 static float calc_voxel_transp(float *result, float *input, int res[3], int *pixel, float *tRay, float correct);
 808 static int get_lamp(Scene *scene, float *light)
 809 {
 810         Base *base_tmp = NULL;
 811         int found_lamp = 0;
 812
 813         // try to find a lamp, preferably local
 814         for(base_tmp = scene->base.first; base_tmp; base_tmp= base_tmp->next) {
 815                 if(base_tmp->object->type == OB_LAMP) {
 816                         Lamp *la = base_tmp->object->data;
 817
 818                         if(la->type == LA_LOCAL) {
 819                                 copy_v3_v3(light, base_tmp->object->obmat[3]);
 820                                 return 1;
 821                         }
 822                         else if(!found_lamp) {
 823                                 copy_v3_v3(light, base_tmp->object->obmat[3]);
 824                                 found_lamp = 1;
 825                         }
 826                 }
 827         }
 828
 829         return found_lamp;
 830 }
 831
 832 static void smoke_calc_domain(Scene *scene, Object *ob, SmokeModifierData *smd)
 833 {
 834         SmokeDomainSettings *sds = smd->domain;
 835         GroupObject *go = NULL;
 836         Base *base = NULL;
 837
 838         // do collisions, needs to be done before emission, so that smoke isn't emitted inside collision cells
 839         if(1)
 840         {
 841                 Object *otherobj = NULL;
 842                 ModifierData *md = NULL;
 843
 844                 if(sds->coll_group) // we use groups since we have 2 domains
 845                         go = sds->coll_group->gobject.first;
 846                 else
 847                         base = scene->base.first;
 848
 849                 while(base || go)
 850                 {
 851                         otherobj = NULL;
 852                         if(sds->coll_group)
 853                         {
 854                                 if(go->ob)
 855                                         otherobj = go->ob;
 856                         }
 857                         else
 858                                 otherobj = base->object;
 859                         if(!otherobj)
 860                         {
 861                                 if(sds->coll_group)
 862                                         go = go->next;
 863                                 else
 864                                         base= base->next;
 865                                 continue;
 866                         }
 867                         md = modifiers_findByType(otherobj, eModifierType_Smoke);
 868
 869                         // check for active smoke modifier
 870                         if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))
 871                         {
 872                                 SmokeModifierData *smd2 = (SmokeModifierData *)md;
 873
 874                                 if((smd2->type & MOD_SMOKE_TYPE_COLL) && smd2->coll && smd2->coll->points)
 875                                 {
 876                                         // we got nice collision object
 877                                         SmokeCollSettings *scs = smd2->coll;
 878                                         size_t i, j;
 879                                         unsigned char *obstacles = smoke_get_obstacle(smd->domain->fluid);
 880
 881                                         for(i = 0; i < scs->numpoints; i++)
 882                                         {
 883                                                 int badcell = 0;
 884                                                 size_t index = 0;
 885                                                 int cell[3];
 886
 887                                                 // 1. get corresponding cell
 888                                                 get_cell(smd->domain->p0, smd->domain->res, smd->domain->dx, &scs->points[3 * i], cell, 0);
 889
 890                                                 // check if cell is valid (in the domain boundary)
 891                                                 for(j = 0; j < 3; j++)
 892                                                         if((cell[j] > sds->res[j] - 1) || (cell[j] < 0))
 893                                                         {
 894                                                                 badcell = 1;
 895                                                                 break;
 896                                                         }
 897
 898                                                         if(badcell)
 899                                                                 continue;
 900                                                 // 2. set cell values (heat, density and velocity)
 901                                                 index = smoke_get_index(cell[0], sds->res[0], cell[1], sds->res[1], cell[2]);
 902
 903                                                 // printf("cell[0]: %d, cell[1]: %d, cell[2]: %d\n", cell[0], cell[1], cell[2]);
 904                                                 // printf("res[0]: %d, res[1]: %d, res[2]: %d, index: %d\n\n", sds->res[0], sds->res[1], sds->res[2], index);
 905                                                 obstacles[index] = 1;
 906                                                 // for moving gobstacles
 907                                                 /*
 908                                                 const LbmFloat maxVelVal = 0.1666;
 909                                                 const LbmFloat maxusqr = maxVelVal*maxVelVal*3. *1.5;
 910
 911                                                 LbmVec objvel = vec2L((mMOIVertices[n]-mMOIVerticesOld[n]) /dvec);
 912                                                 {
 913                                                 const LbmFloat usqr = (objvel[0]*objvel[0]+objvel[1]*objvel[1]+objvel[2]*objvel[2])*1.5;
 914                                                 USQRMAXCHECK(usqr, objvel[0],objvel[1],objvel[2], mMaxVlen, mMxvx,mMxvy,mMxvz);
 915                                                 if(usqr>maxusqr) {
 916                                                 // cutoff at maxVelVal
 917                                                 for(int jj=0; jj<3; jj++) {
 918                                                 if(objvel[jj]>0.) objvel[jj] =  maxVelVal;
 919                                                 if(objvel[jj]<0.) objvel[jj] = -maxVelVal;
 920                                                 }
 921                                                 }
 922                                                 }
 923                                                 const LbmFloat dp=dot(objvel, vec2L((*pNormals)[n]) );
 924                                                 const LbmVec oldov=objvel; // debug
 925                                                 objvel = vec2L((*pNormals)[n]) *dp;
 926                                                 */
 927                                         }
 928                                 }
 929                         }
 930
 931                         if(sds->coll_group)
 932                                 go = go->next;
 933                         else
 934                                 base= base->next;
 935                 }
 936         }
 937
 938         // do flows and fluids
 939         if(1)
 940         {
 941                 Object *otherobj = NULL;
 942                 ModifierData *md = NULL;
 943                 if(sds->fluid_group) // we use groups since we have 2 domains
 944                         go = sds->fluid_group->gobject.first;
 945                 else
 946                         base = scene->base.first;
 947                 while(base || go)
 948                 {
 949                         otherobj = NULL;
 950                         if(sds->fluid_group)
 951                         {
 952                                 if(go->ob)
 953                                         otherobj = go->ob;
 954                         }
 955                         else
 956                                 otherobj = base->object;
 957                         if(!otherobj)
 958                         {
 959                                 if(sds->fluid_group)
 960                                         go = go->next;
 961                                 else
 962                                         base= base->next;
 963
 964                                 continue;
 965                         }
 966
 967                         md = modifiers_findByType(otherobj, eModifierType_Smoke);
 968
 969                         // check for active smoke modifier
 970                         if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))
 971                         {
 972                                 SmokeModifierData *smd2 = (SmokeModifierData *)md;
 973
 974                                 // check for initialized smoke object
 975                                 if((smd2->type & MOD_SMOKE_TYPE_FLOW) && smd2->flow)
 976                                 {
 977                                         // we got nice flow object
 978                                         SmokeFlowSettings *sfs = smd2->flow;
 979
 980                                         if(sfs && sfs->psys && sfs->psys->part && sfs->psys->part->type==PART_EMITTER) // is particle system selected
 981                                         {
 982                                                 ParticleSimulationData sim;
 983                                                 ParticleSystem *psys = sfs->psys;
 984                                                 int p = 0;
 985                                                 float *density = smoke_get_density(sds->fluid);
 986                                                 float *bigdensity = smoke_turbulence_get_density(sds->wt);
 987                                                 float *heat = smoke_get_heat(sds->fluid);
 988                                                 float *velocity_x = smoke_get_velocity_x(sds->fluid);
 989                                                 float *velocity_y = smoke_get_velocity_y(sds->fluid);
 990                                                 float *velocity_z = smoke_get_velocity_z(sds->fluid);
 991                                                 unsigned char *obstacle = smoke_get_obstacle(sds->fluid);
 992                                                 int bigres[3];
 993                                                 short absolute_flow = (sfs->flags & MOD_SMOKE_FLOW_ABSOLUTE);
 994                                                 short high_emission_smoothing = bigdensity ? (smd->domain->flags & MOD_SMOKE_HIGH_SMOOTH) : 0;
 995
 996                                                 /*
 997                                                 * A temporary volume map used to store whole emissive
 998                                                 * area to be added to smoke density and interpolated
 999                                                 * for high resolution smoke.
1000                                                 */
1001                                                 float *temp_emission_map = NULL;
1002
1003                                                 sim.scene = scene;
1004                                                 sim.ob = otherobj;
1005                                                 sim.psys = psys;
1006
1007                                                 // initialize temp emission map
1008                                                 if(!(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW))
1009                                                 {
1010                                                         int i;
1011                                                         temp_emission_map = MEM_callocN(sizeof(float) * sds->res[0]*sds->res[1]*sds->res[2], "SmokeTempEmission");
1012                                                         // set whole volume to 0.0f
1013                                                         for (i=0; i<sds->res[0]*sds->res[1]*sds->res[2]; i++) {
1014                                                                 temp_emission_map[i] = 0.0f;
1015                                                         }
1016                                                 }
1017
1018                                                 // mostly copied from particle code
1019                                                 for(p=0; p<psys->totpart; p++)
1020                                                 {
1021                                                         int cell[3];
1022                                                         size_t i = 0;
1023                                                         size_t index = 0;
1024                                                         int badcell = 0;
1025                                                         ParticleKey state;
1026
1027                                                         if(psys->particles[p].flag & (PARS_NO_DISP|PARS_UNEXIST))
1028                                                                 continue;
1029
1030                                                         state.time = smd->time;
1031
1032                                                         if(psys_get_particle_state(&sim, p, &state, 0) == 0)
1033                                                                 continue;
1034
1035                                                         // VECCOPY(pos, pa->state.co);
1036                                                         // mul_m4_v3(ob->imat, pos);
1037                                                         // 1. get corresponding cell
1038                                                         get_cell(smd->domain->p0, smd->domain->res, smd->domain->dx, state.co, cell, 0);
1039                                                         // check if cell is valid (in the domain boundary)
1040                                                         for(i = 0; i < 3; i++)
1041                                                         {
1042                                                                 if((cell[i] > sds->res[i] - 1) || (cell[i] < 0))
1043                                                                 {
1044                                                                         badcell = 1;
1045                                                                         break;
1046                                                                 }
1047                                                         }
1048                                                         if(badcell)
1049                                                                 continue;
1050                                                         // 2. set cell values (heat, density and velocity)
1051                                                         index = smoke_get_index(cell[0], sds->res[0], cell[1], sds->res[1], cell[2]);
1052                                                         if(!(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW) && !(obstacle[index])) // this is inflow
1053                                                         {
1054                                                                 // heat[index] += sfs->temp * 0.1;
1055                                                                 // density[index] += sfs->density * 0.1;
1056                                                                 heat[index] = sfs->temp;
1057
1058                                                                 // Add emitter density to temp emission map
1059                                                                 temp_emission_map[index] = sfs->density;
1060
1061                                                                 // Uses particle velocity as initial velocity for smoke
1062                                                                 if(sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY && (psys->part->phystype != PART_PHYS_NO))
1063                                                                 {
1064                                                                         velocity_x[index] = state.vel[0]*sfs->vel_multi;
1065                                                                         velocity_y[index] = state.vel[1]*sfs->vel_multi;
1066                                                                         velocity_z[index] = state.vel[2]*sfs->vel_multi;
1067                                                                 }
1068                                                         }
1069                                                         else if(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW) // outflow
1070                                                         {
1071                                                                 heat[index] = 0.f;
1072                                                                 density[index] = 0.f;
1073                                                                 velocity_x[index] = 0.f;
1074                                                                 velocity_y[index] = 0.f;
1075                                                                 velocity_z[index] = 0.f;
1076                                                                 // we need different handling for the high-res feature
1077                                                                 if(bigdensity)
1078                                                                 {
1079                                                                         // init all surrounding cells according to amplification, too
1080                                                                         int i, j, k;
1081                                                                         smoke_turbulence_get_res(smd->domain->wt, bigres);
1082
1083                                                                         for(i = 0; i < smd->domain->amplify + 1; i++)
1084                                                                                 for(j = 0; j < smd->domain->amplify + 1; j++)
1085                                                                                         for(k = 0; k < smd->domain->amplify + 1; k++)
1086                                                                                         {
1087                                                                                                 index = smoke_get_index((smd->domain->amplify + 1)* cell[0] + i, bigres[0], (smd->domain->amplify + 1)* cell[1] + j, bigres[1], (smd->domain->amplify + 1)* cell[2] + k);
1088                                                                                                 bigdensity[index] = 0.f;
1089                                                                                         }
1090                                                                 }
1091                                                         }
1092                                                         }       // particles loop
1093
1094
1095                                                         // apply emission values
1096                                                         if(!(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW)) {
1097
1098                                                                 // initialize variables
1099                                                                 int ii, jj, kk, x, y, z, block_size;
1100                                                                 size_t index, index_big;
1101
1102                                                                 smoke_turbulence_get_res(smd->domain->wt, bigres);
1103                                                                 block_size = smd->domain->amplify + 1;  // high res block size
1104
1105
1106                                                                         // loop through every low res cell
1107                                                                         for(x = 0; x < sds->res[0]; x++)
1108                                                                                 for(y = 0; y < sds->res[1]; y++)
1109                                                                                         for(z = 0; z < sds->res[2]; z++)
1110                                                                                         {
1111
1112                                                                                                 // neighbour cell emission densities (for high resolution smoke smooth interpolation)
1113                                                                                                 float c000, c001, c010, c011,  c100, c101, c110, c111;
1114
1115                                                                                                 c000 = (x>0 && y>0 && z>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y-1, sds->res[1], z-1)] : 0;
1116                                                                                                 c001 = (x>0 && y>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y-1, sds->res[1], z)] : 0;
1117                                                                                                 c010 = (x>0 && z>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y, sds->res[1], z-1)] : 0;
1118                                                                                                 c011 = (x>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y, sds->res[1], z)] : 0;
1119
1120                                                                                                 c100 = (y>0 && z>0) ? temp_emission_map[smoke_get_index(x, sds->res[0], y-1, sds->res[1], z-1)] : 0;
1121                                                                                                 c101 = (y>0) ? temp_emission_map[smoke_get_index(x, sds->res[0], y-1, sds->res[1], z)] : 0;
1122                                                                                                 c110 = (z>0) ? temp_emission_map[smoke_get_index(x, sds->res[0], y, sds->res[1], z-1)] : 0;
1123                                                                                                 c111 = temp_emission_map[smoke_get_index(x, sds->res[0], y, sds->res[1], z)];                   // this cell
1124
1125
1126
1127                                                                                                 // get cell index
1128                                                                                                 index = smoke_get_index(x, sds->res[0], y, sds->res[1], z);
1129
1130                                                                                                 // add emission to low resolution density
1131                                                                                                 if (absolute_flow) {if (temp_emission_map[index]>0) density[index] = temp_emission_map[index];}
1132                                                                                                 else {
1133                                                                                                         density[index] += temp_emission_map[index];
1134                                                                                                         if (density[index]>1) density[index]=1.0f;
1135                                                                                                 }
1136
1137                                                                                                 smoke_turbulence_get_res(smd->domain->wt, bigres);
1138
1139
1140
1141                                                                                                 /*
1142                                                                                                 loop through high res blocks if high res enabled
1143                                                                                                 */
1144                                                                                                 if (bigdensity)
1145                                                                                                 for(ii = 0; ii < block_size; ii++)
1146                                                                                                         for(jj = 0; jj < block_size; jj++)
1147                                                                                                                 for(kk = 0; kk < block_size; kk++)
1148                                                                                                                 {
1149
1150                                                                                                                 float fx,fy,fz, interpolated_value;
1151                                                                                                                 int shift_x, shift_y, shift_z;
1152
1153
1154                                                                                                                 /*
1155                                                                                                                 * Do volume interpolation if emitter smoothing
1156                                                                                                                 * is enabled
1157                                                                                                                 */
1158                                                                                                                 if (high_emission_smoothing) {
1159                                                                                                                         // convert block position to relative
1160                                                                                                                         // for interpolation smoothing
1161                                                                                                                         fx = (float)ii/block_size + 0.5f/block_size;
1162                                                                                                                         fy = (float)jj/block_size + 0.5f/block_size;
1163                                                                                                                         fz = (float)kk/block_size + 0.5f/block_size;
1164
1165                                                                                                                         // calculate trilinear interpolation
1166                                                                                                                         interpolated_value = c000 * (1-fx) * (1-fy) * (1-fz) +
1167                                                                                                                         c100 * fx * (1-fy) * (1-fz) +
1168                                                                                                                         c010 * (1-fx) * fy * (1-fz) +
1169                                                                                                                         c001 * (1-fx) * (1-fy) * fz +
1170                                                                                                                         c101 * fx * (1-fy) * fz +
1171                                                                                                                         c011 * (1-fx) * fy * fz +
1172                                                                                                                         c110 * fx * fy * (1-fz) +
1173                                                                                                                         c111 * fx * fy * fz;
1174
1175
1176                                                                                                                         // add some contrast / sharpness
1177                                                                                                                         // depending on hi-res block size
1178
1179                                                                                                                         interpolated_value = (interpolated_value-0.4f*sfs->density)*(block_size/2) + 0.4f*sfs->density;
1180                                                                                                                         if (interpolated_value<0.0f) interpolated_value = 0.0f;
1181                                                                                                                         if (interpolated_value>1.0f) interpolated_value = 1.0f;
1182
1183                                                                                                                         // shift smoke block index
1184                                                                                                                         // (because pixel center is actually
1185                                                                                                                         // in halfway of the low res block)
1186                                                                                                                         shift_x = (x < 1) ? 0 : block_size/2;
1187                                                                                                                         shift_y = (y < 1) ? 0 : block_size/2;
1188                                                                                                                         shift_z = (z < 1) ? 0 : block_size/2;
1189                                                                                                                 }
1190                                                                                                                 else {
1191                                                                                                                         // without interpolation use same low resolution
1192                                                                                                                         // block value for all hi-res blocks
1193                                                                                                                         interpolated_value = c111;
1194                                                                                                                         shift_x = 0;
1195                                                                                                                         shift_y = 0;
1196                                                                                                                         shift_z = 0;
1197                                                                                                                 }
1198
1199                                                                                                                 // get shifted index for current high resolution block
1200                                                                                                                 index_big = smoke_get_index(block_size * x + ii - shift_x, bigres[0], block_size * y + jj - shift_y, bigres[1], block_size * z + kk - shift_z);
1201
1202                                                                                                                 // add emission data to high resolution density
1203                                                                                                                 if (absolute_flow) {if (interpolated_value > 0) bigdensity[index_big] = interpolated_value;}
1204                                                                                                                 else {
1205                                                                                                                         bigdensity[index_big] += interpolated_value;
1206                                                                                                                         if (bigdensity[index_big]>1) bigdensity[index_big]=1.0f;
1207                                                                                                                 }
1208
1209                                                                                                                 } // end of hires loop
1210
1211                                                                         }       // end of low res loop
1212
1213                                                                 // free temporary emission map
1214                                                         if (temp_emission_map) MEM_freeN(temp_emission_map);
1215
1216                                                         }       // end emission
1217
1218
1219
1220                                 }
1221                                 else
1222                                 {
1223                                         /*
1224                                         for()
1225                                         {
1226                                                 // no psys
1227                                                 BVHTreeNearest nearest;
1228                                                 nearest.index = -1;
1229                                                 nearest.dist = FLT_MAX;
1230
1231                                                 BLI_bvhtree_find_nearest(sfs->bvh->tree, pco, &nearest, sfs->bvh->nearest_callback, sfs->bvh);
1232                                         }*/
1233                                 }
1234                         }
1235                 }
1236                         if(sds->fluid_group)
1237                                 go = go->next;
1238                         else
1239                                 base= base->next;
1240                 }
1241         }
1242
1243         // do effectors
1244         {
1245                 ListBase *effectors = pdInitEffectors(scene, ob, NULL, sds->effector_weights);
1246
1247                 if(effectors)
1248                 {
1249                         float *density = smoke_get_density(sds->fluid);
1250                         float *force_x = smoke_get_force_x(sds->fluid);
1251                         float *force_y = smoke_get_force_y(sds->fluid);
1252                         float *force_z = smoke_get_force_z(sds->fluid);
1253                         float *velocity_x = smoke_get_velocity_x(sds->fluid);
1254                         float *velocity_y = smoke_get_velocity_y(sds->fluid);
1255                         float *velocity_z = smoke_get_velocity_z(sds->fluid);
1256                         int x, y, z;
1257
1258                         // precalculate wind forces
1259                         for(x = 0; x < sds->res[0]; x++)
1260                                 for(y = 0; y < sds->res[1]; y++)
1261                                         for(z = 0; z < sds->res[2]; z++)
1262                         {
1263                                 EffectedPoint epoint;
1264                                 float voxelCenter[3] = {0,0,0} , vel[3] = {0,0,0} , retvel[3] = {0,0,0};
1265                                 unsigned int index = smoke_get_index(x, sds->res[0], y, sds->res[1], z);
1266
1267                                 if(density[index] < FLT_EPSILON)
1268                                         continue;
1269
1270                                 vel[0] = velocity_x[index];
1271                                 vel[1] = velocity_y[index];
1272                                 vel[2] = velocity_z[index];
1273
1274                                 voxelCenter[0] = sds->p0[0] + sds->dx *  x + sds->dx * 0.5;
1275                                 voxelCenter[1] = sds->p0[1] + sds->dx *  y + sds->dx * 0.5;
1276                                 voxelCenter[2] = sds->p0[2] + sds->dx *  z + sds->dx * 0.5;
1277
1278                                 pd_point_from_loc(scene, voxelCenter, vel, index, &epoint);
1279                                 pdDoEffectors(effectors, NULL, sds->effector_weights, &epoint, retvel, NULL);
1280
1281                                 // TODO dg - do in force!
1282                                 force_x[index] = MIN2(MAX2(-1.0, retvel[0] * 0.2), 1.0);
1283                                 force_y[index] = MIN2(MAX2(-1.0, retvel[1] * 0.2), 1.0);
1284                                 force_z[index] = MIN2(MAX2(-1.0, retvel[2] * 0.2), 1.0);
1285                         }
1286                 }
1287
1288                 pdEndEffectors(&effectors);
1289         }
1290
1291 }
1292 void smokeModifier_do(SmokeModifierData *smd, Scene *scene, Object *ob, DerivedMesh *dm)
1293 {
1294         if((smd->type & MOD_SMOKE_TYPE_FLOW))
1295         {
1296                 if(scene->r.cfra >= smd->time)
1297                         smokeModifier_init(smd, ob, scene, dm);
1298
1299                 if(scene->r.cfra > smd->time)
1300                 {
1301                         // XXX TODO
1302                         smd->time = scene->r.cfra;
1303
1304                         // rigid movement support
1305                         /*
1306                         copy_m4_m4(smd->flow->mat_old, smd->flow->mat);
1307                         copy_m4_m4(smd->flow->mat, ob->obmat);
1308                         */
1309                 }
1310                 else if(scene->r.cfra < smd->time)
1311                 {
1312                         smd->time = scene->r.cfra;
1313                         smokeModifier_reset(smd);
1314                 }
1315         }
1316         else if(smd->type & MOD_SMOKE_TYPE_COLL)
1317         {
1318                 if(scene->r.cfra >= smd->time)
1319                         smokeModifier_init(smd, ob, scene, dm);
1320
1321                 if(scene->r.cfra > smd->time)
1322                 {
1323                         // XXX TODO
1324                         smd->time = scene->r.cfra;
1325
1326                         if(smd->coll->dm)
1327                                 smd->coll->dm->release(smd->coll->dm);
1328
1329                         smd->coll->dm = CDDM_copy(dm);
1330
1331                         // rigid movement support
1332                         copy_m4_m4(smd->coll->mat_old, smd->coll->mat);
1333                         copy_m4_m4(smd->coll->mat, ob->obmat);
1334                 }
1335                 else if(scene->r.cfra < smd->time)
1336                 {
1337                         smd->time = scene->r.cfra;
1338                         smokeModifier_reset(smd);
1339                 }
1340         }
1341         else if(smd->type & MOD_SMOKE_TYPE_DOMAIN)
1342         {
1343                 SmokeDomainSettings *sds = smd->domain;
1344                 float light[3];
1345                 PointCache *cache = NULL;
1346                 PTCacheID pid;
1347                 int startframe, endframe, framenr;
1348                 float timescale;
1349
1350                 framenr = scene->r.cfra;
1351
1352                 //printf("time: %d\n", scene->r.cfra);
1353
1354                 cache = sds->point_cache[0];
1355                 BKE_ptcache_id_from_smoke(&pid, ob, smd);
1356                 BKE_ptcache_id_time(&pid, scene, framenr, &startframe, &endframe, &timescale);
1357
1358                 if(!smd->domain->fluid || framenr == startframe)
1359                 {
1360                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1361                         BKE_ptcache_validate(cache, framenr);
1362                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1363                 }
1364
1365                 if(!smd->domain->fluid && (framenr != startframe) && (smd->domain->flags & MOD_SMOKE_FILE_LOAD)==0 && (cache->flag & PTCACHE_BAKED)==0)
1366                         return;
1367
1368                 smd->domain->flags &= ~MOD_SMOKE_FILE_LOAD;
1369
1370                 CLAMP(framenr, startframe, endframe);
1371
1372                 /* If already viewing a pre/after frame, no need to reload */
1373                 if ((smd->time == framenr) && (framenr != scene->r.cfra))
1374                         return;
1375
1376                 // printf("startframe: %d, framenr: %d\n", startframe, framenr);
1377
1378                 if(smokeModifier_init(smd, ob, scene, dm)==0)
1379                 {
1380                         printf("bad smokeModifier_init\n");
1381                         return;
1382                 }
1383
1384                 /* try to read from cache */
1385                 if(BKE_ptcache_read(&pid, (float)framenr) == PTCACHE_READ_EXACT) {
1386                         BKE_ptcache_validate(cache, framenr);
1387                         smd->time = framenr;
1388                         return;
1389                 }
1390
1391                 /* only calculate something when we advanced a single frame */
1392                 if(framenr != (int)smd->time+1)
1393                         return;
1394
1395                 /* don't simulate if viewing start frame, but scene frame is not real start frame */
1396                 if (framenr != scene->r.cfra)
1397                         return;
1398
1399                 tstart();
1400
1401                 smoke_calc_domain(scene, ob, smd);
1402
1403                 /* if on second frame, write cache for first frame */
1404                 if((int)smd->time == startframe && (cache->flag & PTCACHE_OUTDATED || cache->last_exact==0)) {
1405                         // create shadows straight after domain initialization so we get nice shadows for startframe, too
1406                         if(get_lamp(scene, light))
1407                                 smoke_calc_transparency(sds->shadow, smoke_get_density(sds->fluid), sds->p0, sds->p1, sds->res, sds->dx, light, calc_voxel_transp, -7.0*sds->dx);
1408
1409                         if(sds->wt)
1410                         {
1411                                 if(sds->flags & MOD_SMOKE_DISSOLVE)
1412                                         smoke_dissolve_wavelet(sds->wt, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
1413                                 smoke_turbulence_step(sds->wt, sds->fluid);
1414                         }
1415
1416                         BKE_ptcache_write(&pid, startframe);
1417                 }
1418
1419                 // set new time
1420                 smd->time = scene->r.cfra;
1421
1422                 /* do simulation */
1423
1424                 // low res
1425
1426                 // simulate the actual smoke (c++ code in intern/smoke)
1427                 // DG: interesting commenting this line + deactivating loading of noise files
1428                 if(framenr!=startframe)
1429                 {
1430                         if(sds->flags & MOD_SMOKE_DISSOLVE)
1431                                 smoke_dissolve(sds->fluid, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
1432                         smoke_step(sds->fluid, smd->time, scene->r.frs_sec / scene->r.frs_sec_base);
1433                 }
1434
1435                 // create shadows before writing cache so they get stored
1436                 if(get_lamp(scene, light))
1437                         smoke_calc_transparency(sds->shadow, smoke_get_density(sds->fluid), sds->p0, sds->p1, sds->res, sds->dx, light, calc_voxel_transp, -7.0*sds->dx);
1438
1439                 if(sds->wt)
1440                 {
1441                         if(sds->flags & MOD_SMOKE_DISSOLVE)
1442                                 smoke_dissolve_wavelet(sds->wt, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
1443                         smoke_turbulence_step(sds->wt, sds->fluid);
1444                 }
1445
1446                 BKE_ptcache_validate(cache, framenr);
1447                 if(framenr != startframe)
1448                         BKE_ptcache_write(&pid, framenr);
1449
1450                 tend();
1451                 //printf ( "Frame: %d, Time: %f\n", (int)smd->time, ( float ) tval() );
1452         }
1453 }
1454
1455 static float calc_voxel_transp(float *result, float *input, int res[3], int *pixel, float *tRay, float correct)
1456 {
1457         const size_t index = smoke_get_index(pixel[0], res[0], pixel[1], res[1], pixel[2]);
1458
1459         // T_ray *= T_vox
1460         *tRay *= exp(input[index]*correct);
1461
1462         if(result[index] < 0.0f)
1463         {
1464 #pragma omp critical
1465                 result[index] = *tRay;
1466         }
1467
1468         return *tRay;
1469 }
1470
1471 long long smoke_get_mem_req(int xres, int yres, int zres, int amplify)
1472 {
1473         int totalCells = xres * yres * zres;
1474         int amplifiedCells = totalCells * amplify * amplify * amplify;
1475
1476         // print out memory requirements
1477         long long int coarseSize = sizeof(float) * totalCells * 22 +
1478         sizeof(unsigned char) * totalCells;
1479
1480         long long int fineSize = sizeof(float) * amplifiedCells * 7 + // big grids
1481         sizeof(float) * totalCells * 8 +     // small grids
1482         sizeof(float) * 128 * 128 * 128;     // noise tile
1483
1484         long long int totalMB = (coarseSize + fineSize) / (1024 * 1024);
1485
1486         return totalMB;
1487 }
1488
1489 static void bresenham_linie_3D(int x1, int y1, int z1, int x2, int y2, int z2, float *tRay, bresenham_callback cb, float *result, float *input, int res[3], float correct)
1490 {
1491         int dx, dy, dz, i, l, m, n, x_inc, y_inc, z_inc, err_1, err_2, dx2, dy2, dz2;
1492         int pixel[3];
1493
1494         pixel[0] = x1;
1495         pixel[1] = y1;
1496         pixel[2] = z1;
1497
1498         dx = x2 - x1;
1499         dy = y2 - y1;
1500         dz = z2 - z1;
1501
1502         x_inc = (dx < 0) ? -1 : 1;
1503         l = abs(dx);
1504         y_inc = (dy < 0) ? -1 : 1;
1505         m = abs(dy);
1506         z_inc = (dz < 0) ? -1 : 1;
1507         n = abs(dz);
1508         dx2 = l << 1;
1509         dy2 = m << 1;
1510         dz2 = n << 1;
1511
1512         if ((l >= m) && (l >= n)) {
1513                 err_1 = dy2 - l;
1514                 err_2 = dz2 - l;
1515                 for (i = 0; i < l; i++) {
1516                         if(cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
1517                                 break;
1518                         if (err_1 > 0) {
1519                                 pixel[1] += y_inc;
1520                                 err_1 -= dx2;
1521                         }
1522                         if (err_2 > 0) {
1523                                 pixel[2] += z_inc;
1524                                 err_2 -= dx2;
1525                         }
1526                         err_1 += dy2;
1527                         err_2 += dz2;
1528                         pixel[0] += x_inc;
1529                 }
1530         } else if ((m >= l) && (m >= n)) {
1531                 err_1 = dx2 - m;
1532                 err_2 = dz2 - m;
1533                 for (i = 0; i < m; i++) {
1534                         if(cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
1535                                 break;
1536                         if (err_1 > 0) {
1537                                 pixel[0] += x_inc;
1538                                 err_1 -= dy2;
1539                         }
1540                         if (err_2 > 0) {
1541                                 pixel[2] += z_inc;
1542                                 err_2 -= dy2;
1543                         }
1544                         err_1 += dx2;
1545                         err_2 += dz2;
1546                         pixel[1] += y_inc;
1547                 }
1548         } else {
1549                 err_1 = dy2 - n;
1550                 err_2 = dx2 - n;
1551                 for (i = 0; i < n; i++) {
1552                         if(cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
1553                                 break;
1554                         if (err_1 > 0) {
1555                                 pixel[1] += y_inc;
1556                                 err_1 -= dz2;
1557                         }
1558                         if (err_2 > 0) {
1559                                 pixel[0] += x_inc;
1560                                 err_2 -= dz2;
1561                         }
1562                         err_1 += dy2;
1563                         err_2 += dx2;
1564                         pixel[2] += z_inc;
1565                 }
1566         }
1567         cb(result, input, res, pixel, tRay, correct);
1568 }
1569
1570 static void get_cell(float *p0, int res[3], float dx, float *pos, int *cell, int correct)
1571 {
1572         float tmp[3];
1573
1574         VECSUB(tmp, pos, p0);
1575         mul_v3_fl(tmp, 1.0 / dx);
1576
1577         if(correct)
1578         {
1579                 cell[0] = MIN2(res[0] - 1, MAX2(0, (int)floor(tmp[0])));
1580                 cell[1] = MIN2(res[1] - 1, MAX2(0, (int)floor(tmp[1])));
1581                 cell[2] = MIN2(res[2] - 1, MAX2(0, (int)floor(tmp[2])));
1582         }
1583         else
1584         {
1585                 cell[0] = (int)floor(tmp[0]);
1586                 cell[1] = (int)floor(tmp[1]);
1587                 cell[2] = (int)floor(tmp[2]);
1588         }
1589 }
1590
1591 static void smoke_calc_transparency(float *result, float *input, float *p0, float *p1, int res[3], float dx, float *light, bresenham_callback cb, float correct)
1592 {
1593         float bv[6];
1594         int a, z, slabsize=res[0]*res[1], size= res[0]*res[1]*res[2];
1595
1596         for(a=0; a<size; a++)
1597                 result[a]= -1.0f;
1598
1599         bv[0] = p0[0];
1600         bv[1] = p1[0];
1601         // y
1602         bv[2] = p0[1];
1603         bv[3] = p1[1];
1604         // z
1605         bv[4] = p0[2];
1606         bv[5] = p1[2];
1607
1608 #pragma omp parallel for schedule(static,1)
1609         for(z = 0; z < res[2]; z++)
1610         {
1611                 size_t index = z*slabsize;
1612                 int x,y;
1613
1614                 for(y = 0; y < res[1]; y++)
1615                         for(x = 0; x < res[0]; x++, index++)
1616                         {
1617                                 float voxelCenter[3];
1618                                 float pos[3];
1619                                 int cell[3];
1620                                 float tRay = 1.0;
1621
1622                                 if(result[index] >= 0.0f)
1623                                         continue;
1624                                 voxelCenter[0] = p0[0] + dx *  x + dx * 0.5;
1625                                 voxelCenter[1] = p0[1] + dx *  y + dx * 0.5;
1626                                 voxelCenter[2] = p0[2] + dx *  z + dx * 0.5;
1627
1628                                 // get starting position (in voxel coords)
1629                                 if(BLI_bvhtree_bb_raycast(bv, light, voxelCenter, pos) > FLT_EPSILON)
1630                                 {
1631                                         // we're ouside
1632                                         get_cell(p0, res, dx, pos, cell, 1);
1633                                 }
1634                                 else
1635                                 {
1636                                         // we're inside
1637                                         get_cell(p0, res, dx, light, cell, 1);
1638                                 }
1639
1640                                 bresenham_linie_3D(cell[0], cell[1], cell[2], x, y, z, &tRay, cb, result, input, res, correct);
1641
1642                                 // convention -> from a RGBA float array, use G value for tRay
1643 // #pragma omp critical
1644                                 result[index] = tRay;
1645                         }
1646         }
1647 }
1648