misc macro --> bli math lib functions
[blender.git] / source / blender / blenkernel / intern / smoke.c
1 /*
2  * ***** BEGIN GPL LICENSE BLOCK *****
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  *
18  * The Original Code is Copyright (C) Blender Foundation.
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): Daniel Genrich
24  *
25  * ***** END GPL LICENSE BLOCK *****
26  */
27
28 /** \file blender/blenkernel/intern/smoke.c
29  *  \ingroup bke
30  */
31
32
33 /* Part of the code copied from elbeem fluid library, copyright by Nils Thuerey */
34
35 #include <GL/glew.h>
36
37 #include "MEM_guardedalloc.h"
38
39 #include <float.h>
40 #include <math.h>
41 #include <stdio.h>
42 #include <string.h> /* memset */
43
44 #include "BLI_linklist.h"
45 #include "BLI_rand.h"
46 #include "BLI_jitter.h"
47 #include "BLI_blenlib.h"
48 #include "BLI_math.h"
49 #include "BLI_edgehash.h"
50 #include "BLI_kdtree.h"
51 #include "BLI_kdopbvh.h"
52 #include "BLI_utildefines.h"
53
54 #include "BKE_bvhutils.h"
55 #include "BKE_cdderivedmesh.h"
56 #include "BKE_customdata.h"
57 #include "BKE_DerivedMesh.h"
58 #include "BKE_effect.h"
59 #include "BKE_modifier.h"
60 #include "BKE_particle.h"
61 #include "BKE_pointcache.h"
62 #include "BKE_smoke.h"
63
64
65 #include "DNA_customdata_types.h"
66 #include "DNA_group_types.h"
67 #include "DNA_lamp_types.h"
68 #include "DNA_mesh_types.h"
69 #include "DNA_meshdata_types.h"
70 #include "DNA_modifier_types.h"
71 #include "DNA_object_types.h"
72 #include "DNA_particle_types.h"
73 #include "DNA_scene_types.h"
74 #include "DNA_smoke_types.h"
75
76 #include "smoke_API.h"
77
78 #include "BKE_smoke.h"
79
80 #ifdef WITH_SMOKE
81
82 #ifdef _WIN32
83 #include <time.h>
84 #include <stdio.h>
85 #include <conio.h>
86 #include <windows.h>
87
88 static LARGE_INTEGER liFrequency;
89 static LARGE_INTEGER liStartTime;
90 static LARGE_INTEGER liCurrentTime;
91
92 static void tstart ( void )
93 {
94         QueryPerformanceFrequency ( &liFrequency );
95         QueryPerformanceCounter ( &liStartTime );
96 }
97 static void tend ( void )
98 {
99         QueryPerformanceCounter ( &liCurrentTime );
100 }
101 static double tval( void )
102 {
103         return ((double)( (liCurrentTime.QuadPart - liStartTime.QuadPart)* (double)1000.0/(double)liFrequency.QuadPart ));
104 }
105 #else
106 #include <sys/time.h>
107 static struct timeval _tstart, _tend;
108 static struct timezone tz;
109 static void tstart ( void )
110 {
111         gettimeofday ( &_tstart, &tz );
112 }
113 static void tend ( void )
114 {
115         gettimeofday ( &_tend,&tz );
116 }
117
118 #if 0 // unused
119 static double tval()
120 {
121         double t1, t2;
122         t1 = ( double ) _tstart.tv_sec*1000 + ( double ) _tstart.tv_usec/ ( 1000 );
123         t2 = ( double ) _tend.tv_sec*1000 + ( double ) _tend.tv_usec/ ( 1000 );
124         return t2-t1;
125 }
126 #endif
127 #endif
128
129 struct Object;
130 struct Scene;
131 struct DerivedMesh;
132 struct SmokeModifierData;
133
134 #define TRI_UVOFFSET (1./4.)
135
136 /* forward declerations */
137 static void calcTriangleDivs(Object *ob, MVert *verts, int numverts, MFace *tris, int numfaces, int numtris, int **tridivs, float cell_len);
138 static void get_cell(float *p0, int res[3], float dx, float *pos, int *cell, int correct);
139 static void fill_scs_points(Object *ob, DerivedMesh *dm, SmokeCollSettings *scs);
140
141 #else /* WITH_SMOKE */
142
143 /* Stubs to use when smoke is disabled */
144 struct WTURBULENCE *smoke_turbulence_init(int *UNUSED(res), int UNUSED(amplify), int UNUSED(noisetype)) { return NULL; }
145 struct FLUID_3D *smoke_init(int *UNUSED(res), float *UNUSED(p0)) { return NULL; }
146 void smoke_free(struct FLUID_3D *UNUSED(fluid)) {}
147 void smoke_turbulence_free(struct WTURBULENCE *UNUSED(wt)) {}
148 void smoke_initWaveletBlenderRNA(struct WTURBULENCE *UNUSED(wt), float *UNUSED(strength)) {}
149 void smoke_initBlenderRNA(struct FLUID_3D *UNUSED(fluid), float *UNUSED(alpha), float *UNUSED(beta), float *UNUSED(dt_factor), float *UNUSED(vorticity), int *UNUSED(border_colli)) {}
150 long long smoke_get_mem_req(int UNUSED(xres), int UNUSED(yres), int UNUSED(zres), int UNUSED(amplify)) { return 0; }
151 void smokeModifier_do(SmokeModifierData *UNUSED(smd), Scene *UNUSED(scene), Object *UNUSED(ob), DerivedMesh *UNUSED(dm)) {}
152
153 #endif /* WITH_SMOKE */
154
155 #ifdef WITH_SMOKE
156
157 static int smokeModifier_init (SmokeModifierData *smd, Object *ob, Scene *scene, DerivedMesh *dm)
158 {
159         if((smd->type & MOD_SMOKE_TYPE_DOMAIN) && smd->domain && !smd->domain->fluid)
160         {
161                 size_t i;
162                 float min[3] = {FLT_MAX, FLT_MAX, FLT_MAX}, max[3] = {-FLT_MAX, -FLT_MAX, -FLT_MAX};
163                 float size[3];
164                 MVert *verts = dm->getVertArray(dm);
165                 float scale = 0.0;
166                 int res;                
167
168                 res = smd->domain->maxres;
169
170                 // get BB of domain
171                 for(i = 0; i < dm->getNumVerts(dm); i++)
172                 {
173                         float tmp[3];
174
175                         VECCOPY(tmp, verts[i].co);
176                         mul_m4_v3(ob->obmat, tmp);
177
178                         // min BB
179                         min[0] = MIN2(min[0], tmp[0]);
180                         min[1] = MIN2(min[1], tmp[1]);
181                         min[2] = MIN2(min[2], tmp[2]);
182
183                         // max BB
184                         max[0] = MAX2(max[0], tmp[0]);
185                         max[1] = MAX2(max[1], tmp[1]);
186                         max[2] = MAX2(max[2], tmp[2]);
187                 }
188
189                 VECCOPY(smd->domain->p0, min);
190                 VECCOPY(smd->domain->p1, max);
191
192                 // calc other res with max_res provided
193                 VECSUB(size, max, min);
194
195                 // printf("size: %f, %f, %f\n", size[0], size[1], size[2]);
196
197                 // prevent crash when initializing a plane as domain
198                 if((size[0] < FLT_EPSILON) || (size[1] < FLT_EPSILON) || (size[2] < FLT_EPSILON))
199                         return 0;
200
201                 if(size[0] > size[1])
202                 {
203                         if(size[0] > size[2])
204                         {
205                                 scale = res / size[0];
206                                 smd->domain->dx = size[0] / res;
207                                 smd->domain->res[0] = res;
208                                 smd->domain->res[1] = (int)(size[1] * scale + 0.5);
209                                 smd->domain->res[2] = (int)(size[2] * scale + 0.5);
210                         }
211                         else
212                         {
213                                 scale = res / size[2];
214                                 smd->domain->dx = size[2] / res;
215                                 smd->domain->res[2] = res;
216                                 smd->domain->res[0] = (int)(size[0] * scale + 0.5);
217                                 smd->domain->res[1] = (int)(size[1] * scale + 0.5);
218                         }
219                 }
220                 else
221                 {
222                         if(size[1] > size[2])
223                         {
224                                 scale = res / size[1];
225                                 smd->domain->dx = size[1] / res;
226                                 smd->domain->res[1] = res;
227                                 smd->domain->res[0] = (int)(size[0] * scale + 0.5);
228                                 smd->domain->res[2] = (int)(size[2] * scale + 0.5);
229                         }
230                         else
231                         {
232                                 scale = res / size[2];
233                                 smd->domain->dx = size[2] / res;
234                                 smd->domain->res[2] = res;
235                                 smd->domain->res[0] = (int)(size[0] * scale + 0.5);
236                                 smd->domain->res[1] = (int)(size[1] * scale + 0.5);
237                         }
238                 }
239
240                 // printf("smd->domain->dx: %f\n", smd->domain->dx);
241
242                 // TODO: put in failsafe if res<=0 - dg
243
244                 // printf("res[0]: %d, res[1]: %d, res[2]: %d\n", smd->domain->res[0], smd->domain->res[1], smd->domain->res[2]);
245                 // dt max is 0.1
246                 smd->domain->fluid = smoke_init(smd->domain->res, smd->domain->p0);
247                 smd->time = scene->r.cfra;
248
249                 if(smd->domain->flags & MOD_SMOKE_HIGHRES)
250                 {
251                         smd->domain->wt = smoke_turbulence_init(smd->domain->res, smd->domain->amplify + 1, smd->domain->noise);
252                         smd->domain->res_wt[0] = smd->domain->res[0] * (smd->domain->amplify + 1);
253                         smd->domain->res_wt[1] = smd->domain->res[1] * (smd->domain->amplify + 1);                      
254                         smd->domain->res_wt[2] = smd->domain->res[2] * (smd->domain->amplify + 1);                      
255                         smd->domain->dx_wt = smd->domain->dx / (smd->domain->amplify + 1);              
256                         // printf("smd->domain->amplify: %d\n",  smd->domain->amplify);
257                         // printf("(smd->domain->flags & MOD_SMOKE_HIGHRES)\n");
258                 }
259
260                 if(!smd->domain->shadow)
261                         smd->domain->shadow = MEM_callocN(sizeof(float) * smd->domain->res[0] * smd->domain->res[1] * smd->domain->res[2], "SmokeDomainShadow");
262
263                 smoke_initBlenderRNA(smd->domain->fluid, &(smd->domain->alpha), &(smd->domain->beta), &(smd->domain->time_scale), &(smd->domain->vorticity), &(smd->domain->border_collisions));
264
265                 if(smd->domain->wt)     
266                 {
267                         smoke_initWaveletBlenderRNA(smd->domain->wt, &(smd->domain->strength));
268                         // printf("smoke_initWaveletBlenderRNA\n");
269                 }
270                 return 1;
271         }
272         else if((smd->type & MOD_SMOKE_TYPE_FLOW) && smd->flow)
273         {
274                 // handle flow object here
275                 // XXX TODO
276
277                 smd->time = scene->r.cfra;
278
279                 // update particle lifetime to be one frame
280                 // smd->flow->psys->part->lifetime = scene->r.efra + 1;
281 /*
282                 if(!smd->flow->bvh)
283                 {
284                         // smd->flow->bvh = MEM_callocN(sizeof(BVHTreeFromMesh), "smoke_bvhfromfaces");
285                         // bvhtree_from_mesh_faces(smd->flow->bvh, dm, 0.0, 2, 6);
286
287                         // copy obmat
288                         // copy_m4_m4(smd->flow->mat, ob->obmat);
289                         // copy_m4_m4(smd->flow->mat_old, ob->obmat);
290                 }
291 */
292
293                 return 1;
294         }
295         else if((smd->type & MOD_SMOKE_TYPE_COLL))
296         {
297                 smd->time = scene->r.cfra;
298
299                 // todo: delete this when loading colls work -dg
300                 if(!smd->coll)
301                         smokeModifier_createType(smd);
302
303                 if(!smd->coll->points)
304                 {
305                         // init collision points
306                         SmokeCollSettings *scs = smd->coll;
307
308                         // copy obmat
309                         copy_m4_m4(scs->mat, ob->obmat);
310                         copy_m4_m4(scs->mat_old, ob->obmat);
311
312                         fill_scs_points(ob, dm, scs);
313                 }
314
315                 if(!smd->coll->bvhtree)
316                 {
317                         smd->coll->bvhtree = NULL; // bvhtree_build_from_smoke ( ob->obmat, dm->getFaceArray(dm), dm->getNumFaces(dm), dm->getVertArray(dm), dm->getNumVerts(dm), 0.0 );
318                 }
319                 return 1;
320         }
321
322         return 2;
323 }
324
325 static void fill_scs_points(Object *ob, DerivedMesh *dm, SmokeCollSettings *scs)
326 {
327         MVert *mvert = dm->getVertArray(dm);
328         MFace *mface = dm->getFaceArray(dm);
329         int i = 0, divs = 0;
330         int *tridivs = NULL;
331         float cell_len = 1.0 / 50.0; // for res = 50
332         int newdivs = 0;
333         int quads = 0, facecounter = 0;
334
335         // count quads
336         for(i = 0; i < dm->getNumFaces(dm); i++)
337         {
338                 if(mface[i].v4)
339                         quads++;
340         }
341
342         calcTriangleDivs(ob, mvert, dm->getNumVerts(dm), mface,  dm->getNumFaces(dm), dm->getNumFaces(dm) + quads, &tridivs, cell_len);
343
344         // count triangle divisions
345         for(i = 0; i < dm->getNumFaces(dm) + quads; i++)
346         {
347                 divs += (tridivs[3 * i] + 1) * (tridivs[3 * i + 1] + 1) * (tridivs[3 * i + 2] + 1);
348         }
349
350         // printf("divs: %d\n", divs);
351
352         scs->points = MEM_callocN(sizeof(float) * (dm->getNumVerts(dm) + divs) * 3, "SmokeCollPoints");
353
354         for(i = 0; i < dm->getNumVerts(dm); i++)
355         {
356                 float tmpvec[3];
357                 VECCOPY(tmpvec, mvert[i].co);
358                 mul_m4_v3(ob->obmat, tmpvec);
359                 VECCOPY(&scs->points[i * 3], tmpvec);
360         }
361         
362         for(i = 0, facecounter = 0; i < dm->getNumFaces(dm); i++)
363         {
364                 int again = 0;
365                 do
366                 {
367                         int j, k;
368                         int divs1 = tridivs[3 * facecounter + 0];
369                         int divs2 = tridivs[3 * facecounter + 1];
370                         //int divs3 = tridivs[3 * facecounter + 2];
371                         float side1[3], side2[3], trinormorg[3], trinorm[3];
372                         
373                         if(again == 1 && mface[i].v4)
374                         {
375                                 VECSUB(side1,  mvert[ mface[i].v3 ].co, mvert[ mface[i].v1 ].co);
376                                 VECSUB(side2,  mvert[ mface[i].v4 ].co, mvert[ mface[i].v1 ].co);
377                         }
378                         else
379                         {
380                                 VECSUB(side1,  mvert[ mface[i].v2 ].co, mvert[ mface[i].v1 ].co);
381                                 VECSUB(side2,  mvert[ mface[i].v3 ].co, mvert[ mface[i].v1 ].co);
382                         }
383
384                         cross_v3_v3v3(trinormorg, side1, side2);
385                         normalize_v3(trinormorg);
386                         VECCOPY(trinorm, trinormorg);
387                         mul_v3_fl(trinorm, 0.25 * cell_len);
388
389                         for(j = 0; j <= divs1; j++)
390                         {
391                                 for(k = 0; k <= divs2; k++)
392                                 {
393                                         float p1[3], p2[3], p3[3], p[3]={0,0,0}; 
394                                         const float uf = (float)(j + TRI_UVOFFSET) / (float)(divs1 + 0.0);
395                                         const float vf = (float)(k + TRI_UVOFFSET) / (float)(divs2 + 0.0);
396                                         float tmpvec[3];
397                                         
398                                         if(uf+vf > 1.0) 
399                                         {
400                                                 // printf("bigger - divs1: %d, divs2: %d\n", divs1, divs2);
401                                                 continue;
402                                         }
403
404                                         VECCOPY(p1, mvert[ mface[i].v1 ].co);
405                                         if(again == 1 && mface[i].v4)
406                                         {
407                                                 VECCOPY(p2, mvert[ mface[i].v3 ].co);
408                                                 VECCOPY(p3, mvert[ mface[i].v4 ].co);
409                                         }
410                                         else
411                                         {
412                                                 VECCOPY(p2, mvert[ mface[i].v2 ].co);
413                                                 VECCOPY(p3, mvert[ mface[i].v3 ].co);
414                                         }
415
416                                         mul_v3_fl(p1, (1.0-uf-vf));
417                                         mul_v3_fl(p2, uf);
418                                         mul_v3_fl(p3, vf);
419                                         
420                                         VECADD(p, p1, p2);
421                                         VECADD(p, p, p3);
422
423                                         if(newdivs > divs)
424                                                 printf("mem problem\n");
425
426                                         // mMovPoints.push_back(p + trinorm);
427                                         VECCOPY(tmpvec, p);
428                                         VECADD(tmpvec, tmpvec, trinorm);
429                                         mul_m4_v3(ob->obmat, tmpvec);
430                                         VECCOPY(&scs->points[3 * (dm->getNumVerts(dm) + newdivs)], tmpvec);
431                                         newdivs++;
432
433                                         if(newdivs > divs)
434                                                 printf("mem problem\n");
435
436                                         // mMovPoints.push_back(p - trinorm);
437                                         VECCOPY(tmpvec, p);
438                                         VECSUB(tmpvec, tmpvec, trinorm);
439                                         mul_m4_v3(ob->obmat, tmpvec);
440                                         VECCOPY(&scs->points[3 * (dm->getNumVerts(dm) + newdivs)], tmpvec);
441                                         newdivs++;
442                                 }
443                         }
444
445                         if(again == 0 && mface[i].v4)
446                                 again++;
447                         else
448                                 again = 0;
449
450                         facecounter++;
451
452                 } while(again!=0);
453         }
454
455         scs->numpoints = dm->getNumVerts(dm) + newdivs;
456
457         MEM_freeN(tridivs);
458 }
459
460 /*! init triangle divisions */
461 static void calcTriangleDivs(Object *ob, MVert *verts, int UNUSED(numverts), MFace *faces, int numfaces, int numtris, int **tridivs, float cell_len)
462 {
463         // mTriangleDivs1.resize( faces.size() );
464         // mTriangleDivs2.resize( faces.size() );
465         // mTriangleDivs3.resize( faces.size() );
466
467         size_t i = 0, facecounter = 0;
468         float maxscale[3] = {1,1,1}; // = channelFindMaxVf(mcScale);
469         float maxpart = ABS(maxscale[0]);
470         float scaleFac = 0;
471         float fsTri = 0;
472         if(ABS(maxscale[1])>maxpart) maxpart = ABS(maxscale[1]);
473         if(ABS(maxscale[2])>maxpart) maxpart = ABS(maxscale[2]);
474         scaleFac = 1.0 / maxpart;
475         // featureSize = mLevel[mMaxRefine].nodeSize
476         fsTri = cell_len * 0.5 * scaleFac;
477
478         if(*tridivs)
479                 MEM_freeN(*tridivs);
480
481         *tridivs = MEM_callocN(sizeof(int) * numtris * 3, "Smoke_Tridivs");
482
483         for(i = 0, facecounter = 0; i < numfaces; i++) 
484         {
485                 float p0[3], p1[3], p2[3];
486                 float side1[3];
487                 float side2[3];
488                 float side3[3];
489                 int divs1=0, divs2=0, divs3=0;
490
491                 VECCOPY(p0, verts[faces[i].v1].co);
492                 mul_m4_v3(ob->obmat, p0);
493                 VECCOPY(p1, verts[faces[i].v2].co);
494                 mul_m4_v3(ob->obmat, p1);
495                 VECCOPY(p2, verts[faces[i].v3].co);
496                 mul_m4_v3(ob->obmat, p2);
497
498                 VECSUB(side1, p1, p0);
499                 VECSUB(side2, p2, p0);
500                 VECSUB(side3, p1, p2);
501
502                 if(INPR(side1, side1) > fsTri*fsTri) 
503                 { 
504                         float tmp = normalize_v3(side1);
505                         divs1 = (int)ceil(tmp/fsTri); 
506                 }
507                 if(INPR(side2, side2) > fsTri*fsTri) 
508                 { 
509                         float tmp = normalize_v3(side2);
510                         divs2 = (int)ceil(tmp/fsTri); 
511                         
512                         /*
513                         // debug
514                         if(i==0)
515                                 printf("b tmp: %f, fsTri: %f, divs2: %d\n", tmp, fsTri, divs2);
516                         */
517                 }
518
519                 (*tridivs)[3 * facecounter + 0] = divs1;
520                 (*tridivs)[3 * facecounter + 1] = divs2;
521                 (*tridivs)[3 * facecounter + 2] = divs3;
522
523                 // TODO quad case
524                 if(faces[i].v4)
525                 {
526                         divs1=0, divs2=0, divs3=0;
527
528                         facecounter++;
529                         
530                         VECCOPY(p0, verts[faces[i].v3].co);
531                         mul_m4_v3(ob->obmat, p0);
532                         VECCOPY(p1, verts[faces[i].v4].co);
533                         mul_m4_v3(ob->obmat, p1);
534                         VECCOPY(p2, verts[faces[i].v1].co);
535                         mul_m4_v3(ob->obmat, p2);
536
537                         VECSUB(side1, p1, p0);
538                         VECSUB(side2, p2, p0);
539                         VECSUB(side3, p1, p2);
540
541                         if(INPR(side1, side1) > fsTri*fsTri) 
542                         { 
543                                 float tmp = normalize_v3(side1);
544                                 divs1 = (int)ceil(tmp/fsTri); 
545                         }
546                         if(INPR(side2, side2) > fsTri*fsTri) 
547                         { 
548                                 float tmp = normalize_v3(side2);
549                                 divs2 = (int)ceil(tmp/fsTri); 
550                         }
551
552                         (*tridivs)[3 * facecounter + 0] = divs1;
553                         (*tridivs)[3 * facecounter + 1] = divs2;
554                         (*tridivs)[3 * facecounter + 2] = divs3;
555                 }
556                 facecounter++;
557         }
558 }
559
560 #endif /* WITH_SMOKE */
561
562 static void smokeModifier_freeDomain(SmokeModifierData *smd)
563 {
564         if(smd->domain)
565         {
566                 if(smd->domain->shadow)
567                                 MEM_freeN(smd->domain->shadow);
568                         smd->domain->shadow = NULL;
569
570                 if(smd->domain->fluid)
571                         smoke_free(smd->domain->fluid);
572
573                 if(smd->domain->wt)
574                         smoke_turbulence_free(smd->domain->wt);
575
576                 if(smd->domain->effector_weights)
577                                 MEM_freeN(smd->domain->effector_weights);
578                 smd->domain->effector_weights = NULL;
579
580                 BKE_ptcache_free_list(&(smd->domain->ptcaches[0]));
581                 smd->domain->point_cache[0] = NULL;
582
583                 MEM_freeN(smd->domain);
584                 smd->domain = NULL;
585         }
586 }
587
588 static void smokeModifier_freeFlow(SmokeModifierData *smd)
589 {
590         if(smd->flow)
591         {
592 /*
593                 if(smd->flow->bvh)
594                 {
595                         free_bvhtree_from_mesh(smd->flow->bvh);
596                         MEM_freeN(smd->flow->bvh);
597                 }
598                 smd->flow->bvh = NULL;
599 */
600                 MEM_freeN(smd->flow);
601                 smd->flow = NULL;
602         }
603 }
604
605 static void smokeModifier_freeCollision(SmokeModifierData *smd)
606 {
607         if(smd->coll)
608         {
609                 if(smd->coll->points)
610                 {
611                         MEM_freeN(smd->coll->points);
612                         smd->coll->points = NULL;
613                 }
614
615                 if(smd->coll->bvhtree)
616                 {
617                         BLI_bvhtree_free(smd->coll->bvhtree);
618                         smd->coll->bvhtree = NULL;
619                 }
620
621                 if(smd->coll->dm)
622                         smd->coll->dm->release(smd->coll->dm);
623                 smd->coll->dm = NULL;
624
625                 MEM_freeN(smd->coll);
626                 smd->coll = NULL;
627         }
628 }
629
630 void smokeModifier_reset_turbulence(struct SmokeModifierData *smd)
631 {
632         if(smd && smd->domain && smd->domain->wt)
633         {
634                 smoke_turbulence_free(smd->domain->wt);
635                 smd->domain->wt = NULL;
636         }
637 }
638
639 void smokeModifier_reset(struct SmokeModifierData *smd)
640 {
641         if(smd)
642         {
643                 if(smd->domain)
644                 {
645                         if(smd->domain->shadow)
646                                 MEM_freeN(smd->domain->shadow);
647                         smd->domain->shadow = NULL;
648
649                         if(smd->domain->fluid)
650                         {
651                                 smoke_free(smd->domain->fluid);
652                                 smd->domain->fluid = NULL;
653                         }
654
655                         smokeModifier_reset_turbulence(smd);
656
657                         smd->time = -1;
658
659                         // printf("reset domain end\n");
660                 }
661                 else if(smd->flow)
662                 {
663                         /*
664                         if(smd->flow->bvh)
665                         {
666                                 free_bvhtree_from_mesh(smd->flow->bvh);
667                                 MEM_freeN(smd->flow->bvh);
668                         }
669                         smd->flow->bvh = NULL;
670                         */
671                 }
672                 else if(smd->coll)
673                 {
674                         if(smd->coll->points)
675                         {
676                                 MEM_freeN(smd->coll->points);
677                                 smd->coll->points = NULL;
678                         }
679
680                         if(smd->coll->bvhtree)
681                         {
682                                 BLI_bvhtree_free(smd->coll->bvhtree);
683                                 smd->coll->bvhtree = NULL;
684                         }
685
686                         if(smd->coll->dm)
687                                 smd->coll->dm->release(smd->coll->dm);
688                         smd->coll->dm = NULL;
689
690                 }
691         }
692 }
693
694 void smokeModifier_free (SmokeModifierData *smd)
695 {
696         if(smd)
697         {
698                 smokeModifier_freeDomain(smd);
699                 smokeModifier_freeFlow(smd);
700                 smokeModifier_freeCollision(smd);
701         }
702 }
703
704 void smokeModifier_createType(struct SmokeModifierData *smd)
705 {
706         if(smd)
707         {
708                 if(smd->type & MOD_SMOKE_TYPE_DOMAIN)
709                 {
710                         if(smd->domain)
711                                 smokeModifier_freeDomain(smd);
712
713                         smd->domain = MEM_callocN(sizeof(SmokeDomainSettings), "SmokeDomain");
714
715                         smd->domain->smd = smd;
716
717                         smd->domain->point_cache[0] = BKE_ptcache_add(&(smd->domain->ptcaches[0]));
718                         smd->domain->point_cache[0]->flag |= PTCACHE_DISK_CACHE;
719                         smd->domain->point_cache[0]->step = 1;
720
721                         /* Deprecated */
722                         smd->domain->point_cache[1] = NULL;
723                         smd->domain->ptcaches[1].first = smd->domain->ptcaches[1].last = NULL;
724                         /* set some standard values */
725                         smd->domain->fluid = NULL;
726                         smd->domain->wt = NULL;                 
727                         smd->domain->eff_group = NULL;
728                         smd->domain->fluid_group = NULL;
729                         smd->domain->coll_group = NULL;
730                         smd->domain->maxres = 32;
731                         smd->domain->amplify = 1;                       
732                         smd->domain->omega = 1.0;                       
733                         smd->domain->alpha = -0.001;
734                         smd->domain->beta = 0.1;
735                         smd->domain->time_scale = 1.0;
736                         smd->domain->vorticity = 2.0;
737                         smd->domain->border_collisions = 1;             // vertically non-colliding
738                         smd->domain->flags = MOD_SMOKE_DISSOLVE_LOG | MOD_SMOKE_HIGH_SMOOTH;
739                         smd->domain->strength = 2.0;
740                         smd->domain->noise = MOD_SMOKE_NOISEWAVE;
741                         smd->domain->diss_speed = 5;
742                         // init 3dview buffer
743
744                         smd->domain->viewsettings = MOD_SMOKE_VIEW_SHOWBIG;
745                         smd->domain->effector_weights = BKE_add_effector_weights(NULL);
746                 }
747                 else if(smd->type & MOD_SMOKE_TYPE_FLOW)
748                 {
749                         if(smd->flow)
750                                 smokeModifier_freeFlow(smd);
751
752                         smd->flow = MEM_callocN(sizeof(SmokeFlowSettings), "SmokeFlow");
753
754                         smd->flow->smd = smd;
755
756                         /* set some standard values */
757                         smd->flow->density = 1.0;
758                         smd->flow->temp = 1.0;
759                         smd->flow->flags = MOD_SMOKE_FLOW_ABSOLUTE;
760                         smd->flow->vel_multi = 1.0;
761
762                         smd->flow->psys = NULL;
763
764                 }
765                 else if(smd->type & MOD_SMOKE_TYPE_COLL)
766                 {
767                         if(smd->coll)
768                                 smokeModifier_freeCollision(smd);
769
770                         smd->coll = MEM_callocN(sizeof(SmokeCollSettings), "SmokeColl");
771
772                         smd->coll->smd = smd;
773                         smd->coll->points = NULL;
774                         smd->coll->numpoints = 0;
775                         smd->coll->bvhtree = NULL;
776                         smd->coll->dm = NULL;
777                 }
778         }
779 }
780
781 void smokeModifier_copy(struct SmokeModifierData *smd, struct SmokeModifierData *tsmd)
782 {
783         tsmd->type = smd->type;
784         tsmd->time = smd->time;
785         
786         smokeModifier_createType(tsmd);
787
788         if (tsmd->domain) {
789                 tsmd->domain->maxres = smd->domain->maxres;
790                 tsmd->domain->amplify = smd->domain->amplify;
791                 tsmd->domain->omega = smd->domain->omega;
792                 tsmd->domain->alpha = smd->domain->alpha;
793                 tsmd->domain->beta = smd->domain->beta;
794                 tsmd->domain->flags = smd->domain->flags;
795                 tsmd->domain->strength = smd->domain->strength;
796                 tsmd->domain->noise = smd->domain->noise;
797                 tsmd->domain->diss_speed = smd->domain->diss_speed;
798                 tsmd->domain->viewsettings = smd->domain->viewsettings;
799                 tsmd->domain->fluid_group = smd->domain->fluid_group;
800                 tsmd->domain->coll_group = smd->domain->coll_group;
801                 tsmd->domain->vorticity = smd->domain->vorticity;
802                 tsmd->domain->time_scale = smd->domain->time_scale;
803                 tsmd->domain->border_collisions = smd->domain->border_collisions;
804                 
805                 MEM_freeN(tsmd->domain->effector_weights);
806                 tsmd->domain->effector_weights = MEM_dupallocN(smd->domain->effector_weights);
807         } else if (tsmd->flow) {
808                 tsmd->flow->density = smd->flow->density;
809                 tsmd->flow->temp = smd->flow->temp;
810                 tsmd->flow->psys = smd->flow->psys;
811                 tsmd->flow->type = smd->flow->type;
812                 tsmd->flow->flags = smd->flow->flags;
813                 tsmd->flow->vel_multi = smd->flow->vel_multi;
814         } else if (tsmd->coll) {
815                 ;
816                 /* leave it as initialised, collision settings is mostly caches */
817         }
818 }
819
820 #ifdef WITH_SMOKE
821
822 // forward decleration
823 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);
824 static float calc_voxel_transp(float *result, float *input, int res[3], int *pixel, float *tRay, float correct);
825
826 static int get_lamp(Scene *scene, float *light)
827 {       
828         Base *base_tmp = NULL;  
829         int found_lamp = 0;
830
831         // try to find a lamp, preferably local
832         for(base_tmp = scene->base.first; base_tmp; base_tmp= base_tmp->next) {
833                 if(base_tmp->object->type == OB_LAMP) {
834                         Lamp *la = base_tmp->object->data;
835
836                         if(la->type == LA_LOCAL) {
837                                 copy_v3_v3(light, base_tmp->object->obmat[3]);
838                                 return 1;
839                         }
840                         else if(!found_lamp) {
841                                 copy_v3_v3(light, base_tmp->object->obmat[3]);
842                                 found_lamp = 1;
843                         }
844                 }
845         }
846
847         return found_lamp;
848 }
849
850 static void smoke_calc_domain(Scene *scene, Object *ob, SmokeModifierData *smd)
851 {
852         SmokeDomainSettings *sds = smd->domain;
853         GroupObject *go = NULL;                 
854         Base *base = NULL;      
855
856         // do collisions, needs to be done before emission, so that smoke isn't emitted inside collision cells
857         if(1)
858         {
859                 Object *otherobj = NULL;
860                 ModifierData *md = NULL;
861
862                 if(sds->coll_group) // we use groups since we have 2 domains
863                         go = sds->coll_group->gobject.first;
864                 else
865                         base = scene->base.first;
866
867                 while(base || go)
868                 {
869                         otherobj = NULL;
870                         if(sds->coll_group) 
871                         {                                               
872                                 if(go->ob)                                                      
873                                         otherobj = go->ob;                                      
874                         }                                       
875                         else                                            
876                                 otherobj = base->object;                                        
877                         if(!otherobj)                                   
878                         {                                               
879                                 if(sds->coll_group)                                                     
880                                         go = go->next;                                          
881                                 else                                                    
882                                         base= base->next;                                               
883                                 continue;                                       
884                         }                       
885                         md = modifiers_findByType(otherobj, eModifierType_Smoke);
886                         
887                         // check for active smoke modifier
888                         if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))                                    
889                         {
890                                 SmokeModifierData *smd2 = (SmokeModifierData *)md;
891
892                                 if((smd2->type & MOD_SMOKE_TYPE_COLL) && smd2->coll && smd2->coll->points)
893                                 {
894                                         // we got nice collision object
895                                         SmokeCollSettings *scs = smd2->coll;
896                                         size_t i, j;
897                                         unsigned char *obstacles = smoke_get_obstacle(smd->domain->fluid);
898
899                                         for(i = 0; i < scs->numpoints; i++)
900                                         {
901                                                 int badcell = 0;
902                                                 size_t index = 0;
903                                                 int cell[3];
904
905                                                 // 1. get corresponding cell
906                                                 get_cell(smd->domain->p0, smd->domain->res, smd->domain->dx, &scs->points[3 * i], cell, 0);
907                                         
908                                                 // check if cell is valid (in the domain boundary)
909                                                 for(j = 0; j < 3; j++)
910                                                         if((cell[j] > sds->res[j] - 1) || (cell[j] < 0))
911                                                         {
912                                                                 badcell = 1;
913                                                                 break;
914                                                         }
915                                                                                                                                 
916                                                         if(badcell)                                                                     
917                                                                 continue;
918                                                 // 2. set cell values (heat, density and velocity)
919                                                 index = smoke_get_index(cell[0], sds->res[0], cell[1], sds->res[1], cell[2]);
920                                                                                                                 
921                                                 // printf("cell[0]: %d, cell[1]: %d, cell[2]: %d\n", cell[0], cell[1], cell[2]);                                                                
922                                                 // printf("res[0]: %d, res[1]: %d, res[2]: %d, index: %d\n\n", sds->res[0], sds->res[1], sds->res[2], index);                                                                                                                                   
923                                                 obstacles[index] = 1;
924                                                 // for moving gobstacles                                                                
925                                                 /*
926                                                 const LbmFloat maxVelVal = 0.1666;
927                                                 const LbmFloat maxusqr = maxVelVal*maxVelVal*3. *1.5;
928
929                                                 LbmVec objvel = vec2L((mMOIVertices[n]-mMOIVerticesOld[n]) /dvec); 
930                                                 {                                                               
931                                                 const LbmFloat usqr = (objvel[0]*objvel[0]+objvel[1]*objvel[1]+objvel[2]*objvel[2])*1.5;                                                                
932                                                 USQRMAXCHECK(usqr, objvel[0],objvel[1],objvel[2], mMaxVlen, mMxvx,mMxvy,mMxvz);                                                                 
933                                                 if(usqr>maxusqr) {                                                                      
934                                                 // cutoff at maxVelVal                                                                  
935                                                 for(int jj=0; jj<3; jj++) {                                                                             
936                                                 if(objvel[jj]>0.) objvel[jj] =  maxVelVal;                                                                              
937                                                 if(objvel[jj]<0.) objvel[jj] = -maxVelVal;                                                                      
938                                                 }                                                               
939                                                 } 
940                                                 }                                                               
941                                                 const LbmFloat dp=dot(objvel, vec2L((*pNormals)[n]) );                                                          
942                                                 const LbmVec oldov=objvel; // debug                                                             
943                                                 objvel = vec2L((*pNormals)[n]) *dp;                                                             
944                                                 */
945                                         }
946                                 }
947                         }
948
949                         if(sds->coll_group)
950                                 go = go->next;
951                         else
952                                 base= base->next;
953                 }
954         }
955
956         // do flows and fluids
957         if(1)                   
958         {
959                 Object *otherobj = NULL;                                
960                 ModifierData *md = NULL;
961                 if(sds->fluid_group) // we use groups since we have 2 domains
962                         go = sds->fluid_group->gobject.first;                           
963                 else                                    
964                         base = scene->base.first;
965                 while(base || go)
966                 {                                       
967                         otherobj = NULL;
968                         if(sds->fluid_group) 
969                         {
970                                 if(go->ob)                                                      
971                                         otherobj = go->ob;                                      
972                         }                                       
973                         else                                            
974                                 otherobj = base->object;
975                         if(!otherobj)
976                         {
977                                 if(sds->fluid_group)
978                                         go = go->next;
979                                 else
980                                         base= base->next;
981
982                                 continue;
983                         }
984
985                         md = modifiers_findByType(otherobj, eModifierType_Smoke);
986                         
987                         // check for active smoke modifier
988                         if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))
989                         {
990                                 SmokeModifierData *smd2 = (SmokeModifierData *)md;
991                                 
992                                 // check for initialized smoke object
993                                 if((smd2->type & MOD_SMOKE_TYPE_FLOW) && smd2->flow)                                            
994                                 {
995                                         // we got nice flow object
996                                         SmokeFlowSettings *sfs = smd2->flow;
997                                         
998                                         if(sfs && sfs->psys && sfs->psys->part && sfs->psys->part->type==PART_EMITTER) // is particle system selected
999                                         {
1000                                                 ParticleSimulationData sim;
1001                                                 ParticleSystem *psys = sfs->psys;
1002                                                 int p = 0;                                                              
1003                                                 float *density = smoke_get_density(sds->fluid);                                                         
1004                                                 float *bigdensity = smoke_turbulence_get_density(sds->wt);                                                              
1005                                                 float *heat = smoke_get_heat(sds->fluid);                                                               
1006                                                 float *velocity_x = smoke_get_velocity_x(sds->fluid);                                                           
1007                                                 float *velocity_y = smoke_get_velocity_y(sds->fluid);                                                           
1008                                                 float *velocity_z = smoke_get_velocity_z(sds->fluid);                                                           
1009                                                 unsigned char *obstacle = smoke_get_obstacle(sds->fluid);                                                               
1010                                                 int bigres[3];
1011                                                 short absolute_flow = (sfs->flags & MOD_SMOKE_FLOW_ABSOLUTE);
1012                                                 short high_emission_smoothing = bigdensity ? (smd->domain->flags & MOD_SMOKE_HIGH_SMOOTH) : 0;
1013
1014                                                 /*
1015                                                 * A temporary volume map used to store whole emissive
1016                                                 * area to be added to smoke density and interpolated
1017                                                 * for high resolution smoke.
1018                                                 */
1019                                                 float *temp_emission_map = NULL;
1020
1021                                                 sim.scene = scene;
1022                                                 sim.ob = otherobj;
1023                                                 sim.psys = psys;
1024
1025                                                 // initialize temp emission map
1026                                                 if(!(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW))
1027                                                 {
1028                                                         int i;
1029                                                         temp_emission_map = MEM_callocN(sizeof(float) * sds->res[0]*sds->res[1]*sds->res[2], "SmokeTempEmission");
1030                                                         // set whole volume to 0.0f
1031                                                         for (i=0; i<sds->res[0]*sds->res[1]*sds->res[2]; i++) {
1032                                                                 temp_emission_map[i] = 0.0f;
1033                                                         }
1034                                                 }
1035                                                                                                                 
1036                                                 // mostly copied from particle code                                                             
1037                                                 for(p=0; p<psys->totpart; p++)                                                          
1038                                                 {
1039                                                         int cell[3];
1040                                                         size_t i = 0;
1041                                                         size_t index = 0;
1042                                                         int badcell = 0;
1043                                                         ParticleKey state;
1044
1045                                                         if(psys->particles[p].flag & (PARS_NO_DISP|PARS_UNEXIST))
1046                                                                 continue;
1047
1048                                                         state.time = smd->time;
1049
1050                                                         if(psys_get_particle_state(&sim, p, &state, 0) == 0)
1051                                                                 continue;
1052                                                         
1053                                                         // VECCOPY(pos, pa->state.co);                                                                  
1054                                                         // mul_m4_v3(ob->imat, pos);                                                                                                                                            
1055                                                         // 1. get corresponding cell    
1056                                                         get_cell(smd->domain->p0, smd->domain->res, smd->domain->dx, state.co, cell, 0);                                                                                                                                        
1057                                                         // check if cell is valid (in the domain boundary)                                                                      
1058                                                         for(i = 0; i < 3; i++)                                                                  
1059                                                         {                                                                               
1060                                                                 if((cell[i] > sds->res[i] - 1) || (cell[i] < 0))                                                                                
1061                                                                 {                                                                                       
1062                                                                         badcell = 1;                                                                                    
1063                                                                         break;                                                                          
1064                                                                 }                                                                       
1065                                                         }                                                                                                                                                       
1066                                                         if(badcell)                                                                             
1067                                                                 continue;                                                                                                                                               
1068                                                         // 2. set cell values (heat, density and velocity)                                                                      
1069                                                         index = smoke_get_index(cell[0], sds->res[0], cell[1], sds->res[1], cell[2]);                                                                                                                                           
1070                                                         if(!(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW) && !(obstacle[index])) // this is inflow
1071                                                         {                                                                               
1072                                                                 // heat[index] += sfs->temp * 0.1;                                                                              
1073                                                                 // density[index] += sfs->density * 0.1;
1074                                                                 heat[index] = sfs->temp;
1075                                                                 
1076                                                                 // Add emitter density to temp emission map
1077                                                                 temp_emission_map[index] = sfs->density;
1078
1079                                                                 // Uses particle velocity as initial velocity for smoke
1080                                                                 if(sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY && (psys->part->phystype != PART_PHYS_NO))
1081                                                                 {
1082                                                                         velocity_x[index] = state.vel[0]*sfs->vel_multi;
1083                                                                         velocity_y[index] = state.vel[1]*sfs->vel_multi;
1084                                                                         velocity_z[index] = state.vel[2]*sfs->vel_multi;
1085                                                                 }                                                                               
1086                                                         }                                                                       
1087                                                         else if(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW) // outflow                                                                     
1088                                                         {                                                                               
1089                                                                 heat[index] = 0.f;                                                                              
1090                                                                 density[index] = 0.f;                                                                           
1091                                                                 velocity_x[index] = 0.f;                                                                                
1092                                                                 velocity_y[index] = 0.f;                                                                                
1093                                                                 velocity_z[index] = 0.f;
1094                                                                 // we need different handling for the high-res feature
1095                                                                 if(bigdensity)
1096                                                                 {
1097                                                                         // init all surrounding cells according to amplification, too                                                                                   
1098                                                                         int i, j, k;
1099                                                                         smoke_turbulence_get_res(smd->domain->wt, bigres);
1100
1101                                                                         for(i = 0; i < smd->domain->amplify + 1; i++)
1102                                                                                 for(j = 0; j < smd->domain->amplify + 1; j++)
1103                                                                                         for(k = 0; k < smd->domain->amplify + 1; k++)
1104                                                                                         {                                                                                                               
1105                                                                                                 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);                                                                                                               
1106                                                                                                 bigdensity[index] = 0.f;                                                                                                        
1107                                                                                         }                                                                               
1108                                                                 }
1109                                                         }
1110                                                         }       // particles loop
1111
1112
1113                                                         // apply emission values
1114                                                         if(!(sfs->type & MOD_SMOKE_FLOW_TYPE_OUTFLOW)) {
1115
1116                                                                 // initialize variables
1117                                                                 int ii, jj, kk, x, y, z, block_size;
1118                                                                 size_t index, index_big;
1119
1120                                                                 smoke_turbulence_get_res(smd->domain->wt, bigres);
1121                                                                 block_size = smd->domain->amplify + 1;  // high res block size
1122
1123
1124                                                                         // loop through every low res cell
1125                                                                         for(x = 0; x < sds->res[0]; x++)
1126                                                                                 for(y = 0; y < sds->res[1]; y++)
1127                                                                                         for(z = 0; z < sds->res[2]; z++)                                                                                                        
1128                                                                                         {
1129
1130                                                                                                 // neighbour cell emission densities (for high resolution smoke smooth interpolation)
1131                                                                                                 float c000, c001, c010, c011,  c100, c101, c110, c111;
1132
1133                                                                                                 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;
1134                                                                                                 c001 = (x>0 && y>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y-1, sds->res[1], z)] : 0;
1135                                                                                                 c010 = (x>0 && z>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y, sds->res[1], z-1)] : 0;
1136                                                                                                 c011 = (x>0) ? temp_emission_map[smoke_get_index(x-1, sds->res[0], y, sds->res[1], z)] : 0;
1137
1138                                                                                                 c100 = (y>0 && z>0) ? temp_emission_map[smoke_get_index(x, sds->res[0], y-1, sds->res[1], z-1)] : 0;
1139                                                                                                 c101 = (y>0) ? temp_emission_map[smoke_get_index(x, sds->res[0], y-1, sds->res[1], z)] : 0;
1140                                                                                                 c110 = (z>0) ? temp_emission_map[smoke_get_index(x, sds->res[0], y, sds->res[1], z-1)] : 0;
1141                                                                                                 c111 = temp_emission_map[smoke_get_index(x, sds->res[0], y, sds->res[1], z)];                   // this cell
1142
1143
1144
1145                                                                                                 // get cell index
1146                                                                                                 index = smoke_get_index(x, sds->res[0], y, sds->res[1], z);
1147
1148                                                                                                 // add emission to low resolution density
1149                                                                                                 if (absolute_flow) {if (temp_emission_map[index]>0) density[index] = temp_emission_map[index];}
1150                                                                                                 else {
1151                                                                                                         density[index] += temp_emission_map[index];
1152                                                                                                         if (density[index]>1) density[index]=1.0f;
1153                                                                                                 }
1154
1155                                                                                                 smoke_turbulence_get_res(smd->domain->wt, bigres);
1156
1157
1158
1159                                                                                                 /*
1160                                                                                                 loop through high res blocks if high res enabled
1161                                                                                                 */
1162                                                                                                 if (bigdensity)
1163                                                                                                 for(ii = 0; ii < block_size; ii++)
1164                                                                                                         for(jj = 0; jj < block_size; jj++)
1165                                                                                                                 for(kk = 0; kk < block_size; kk++)                                                                                                      
1166                                                                                                                 {
1167
1168                                                                                                                 float fx,fy,fz, interpolated_value;
1169                                                                                                                 int shift_x, shift_y, shift_z;
1170
1171
1172                                                                                                                 /*
1173                                                                                                                 * Do volume interpolation if emitter smoothing
1174                                                                                                                 * is enabled
1175                                                                                                                 */
1176                                                                                                                 if (high_emission_smoothing) {
1177                                                                                                                         // convert block position to relative
1178                                                                                                                         // for interpolation smoothing
1179                                                                                                                         fx = (float)ii/block_size + 0.5f/block_size;
1180                                                                                                                         fy = (float)jj/block_size + 0.5f/block_size;
1181                                                                                                                         fz = (float)kk/block_size + 0.5f/block_size;
1182
1183                                                                                                                         // calculate trilinear interpolation
1184                                                                                                                         interpolated_value = c000 * (1-fx) * (1-fy) * (1-fz) +
1185                                                                                                                         c100 * fx * (1-fy) * (1-fz) +
1186                                                                                                                         c010 * (1-fx) * fy * (1-fz) +
1187                                                                                                                         c001 * (1-fx) * (1-fy) * fz +
1188                                                                                                                         c101 * fx * (1-fy) * fz +
1189                                                                                                                         c011 * (1-fx) * fy * fz +
1190                                                                                                                         c110 * fx * fy * (1-fz) +
1191                                                                                                                         c111 * fx * fy * fz;
1192
1193
1194                                                                                                                         // add some contrast / sharpness
1195                                                                                                                         // depending on hi-res block size
1196
1197                                                                                                                         interpolated_value = (interpolated_value-0.4f*sfs->density)*(block_size/2) + 0.4f*sfs->density;
1198                                                                                                                         if (interpolated_value<0.0f) interpolated_value = 0.0f;
1199                                                                                                                         if (interpolated_value>1.0f) interpolated_value = 1.0f;
1200
1201                                                                                                                         // shift smoke block index
1202                                                                                                                         // (because pixel center is actually
1203                                                                                                                         // in halfway of the low res block)
1204                                                                                                                         shift_x = (x < 1) ? 0 : block_size/2;
1205                                                                                                                         shift_y = (y < 1) ? 0 : block_size/2;
1206                                                                                                                         shift_z = (z < 1) ? 0 : block_size/2;
1207                                                                                                                 }
1208                                                                                                                 else {
1209                                                                                                                         // without interpolation use same low resolution
1210                                                                                                                         // block value for all hi-res blocks
1211                                                                                                                         interpolated_value = c111;
1212                                                                                                                         shift_x = 0;
1213                                                                                                                         shift_y = 0;
1214                                                                                                                         shift_z = 0;
1215                                                                                                                 }
1216
1217                                                                                                                 // get shifted index for current high resolution block
1218                                                                                                                 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);                                                                                                         
1219                                                                                                                 
1220                                                                                                                 // add emission data to high resolution density
1221                                                                                                                 if (absolute_flow) {if (interpolated_value > 0) bigdensity[index_big] = interpolated_value;}
1222                                                                                                                 else {
1223                                                                                                                         bigdensity[index_big] += interpolated_value;
1224                                                                                                                         if (bigdensity[index_big]>1) bigdensity[index_big]=1.0f;
1225                                                                                                                 }
1226
1227                                                                                                                 } // end of hires loop
1228
1229                                                                         }       // end of low res loop
1230
1231                                                                 // free temporary emission map
1232                                                         if (temp_emission_map) MEM_freeN(temp_emission_map);
1233
1234                                                         }       // end emission
1235
1236
1237                                                                                 
1238                                 }                                                       
1239                                 else                                                    
1240                                 {                                                               
1241                                         /*                                                              
1242                                         for()                                                           
1243                                         {                                                                       
1244                                                 // no psys                                                                      
1245                                                 BVHTreeNearest nearest;
1246                                                 nearest.index = -1;
1247                                                 nearest.dist = FLT_MAX;
1248
1249                                                 BLI_bvhtree_find_nearest(sfs->bvh->tree, pco, &nearest, sfs->bvh->nearest_callback, sfs->bvh);
1250                                         }*/                                                     
1251                                 }
1252                         }                                               
1253                 }
1254                         if(sds->fluid_group)
1255                                 go = go->next;
1256                         else
1257                                 base= base->next;
1258                 }
1259         }
1260
1261         // do effectors
1262         {
1263                 ListBase *effectors = pdInitEffectors(scene, ob, NULL, sds->effector_weights);
1264
1265                 if(effectors)
1266                 {
1267                         float *density = smoke_get_density(sds->fluid);
1268                         float *force_x = smoke_get_force_x(sds->fluid);
1269                         float *force_y = smoke_get_force_y(sds->fluid);
1270                         float *force_z = smoke_get_force_z(sds->fluid);
1271                         float *velocity_x = smoke_get_velocity_x(sds->fluid);
1272                         float *velocity_y = smoke_get_velocity_y(sds->fluid);
1273                         float *velocity_z = smoke_get_velocity_z(sds->fluid);
1274                         int x, y, z;
1275
1276                         // precalculate wind forces
1277                         for(x = 0; x < sds->res[0]; x++)
1278                                 for(y = 0; y < sds->res[1]; y++)
1279                                         for(z = 0; z < sds->res[2]; z++)
1280                         {       
1281                                 EffectedPoint epoint;
1282                                 float voxelCenter[3] = {0,0,0} , vel[3] = {0,0,0} , retvel[3] = {0,0,0};
1283                                 unsigned int index = smoke_get_index(x, sds->res[0], y, sds->res[1], z);
1284
1285                                 if(density[index] < FLT_EPSILON)                                        
1286                                         continue;       
1287
1288                                 vel[0] = velocity_x[index];
1289                                 vel[1] = velocity_y[index];
1290                                 vel[2] = velocity_z[index];
1291
1292                                 voxelCenter[0] = sds->p0[0] + sds->dx *  x + sds->dx * 0.5;
1293                                 voxelCenter[1] = sds->p0[1] + sds->dx *  y + sds->dx * 0.5;
1294                                 voxelCenter[2] = sds->p0[2] + sds->dx *  z + sds->dx * 0.5;
1295
1296                                 pd_point_from_loc(scene, voxelCenter, vel, index, &epoint);
1297                                 pdDoEffectors(effectors, NULL, sds->effector_weights, &epoint, retvel, NULL);
1298
1299                                 // TODO dg - do in force!
1300                                 force_x[index] = MIN2(MAX2(-1.0, retvel[0] * 0.2), 1.0); 
1301                                 force_y[index] = MIN2(MAX2(-1.0, retvel[1] * 0.2), 1.0); 
1302                                 force_z[index] = MIN2(MAX2(-1.0, retvel[2] * 0.2), 1.0);
1303                         }
1304                 }
1305
1306                 pdEndEffectors(&effectors);
1307         }
1308
1309 }
1310 void smokeModifier_do(SmokeModifierData *smd, Scene *scene, Object *ob, DerivedMesh *dm)
1311 {       
1312         if((smd->type & MOD_SMOKE_TYPE_FLOW))
1313         {
1314                 if(scene->r.cfra >= smd->time)
1315                         smokeModifier_init(smd, ob, scene, dm);
1316
1317                 if(scene->r.cfra > smd->time)
1318                 {
1319                         // XXX TODO
1320                         smd->time = scene->r.cfra;
1321
1322                         // rigid movement support
1323                         /*
1324                         copy_m4_m4(smd->flow->mat_old, smd->flow->mat);
1325                         copy_m4_m4(smd->flow->mat, ob->obmat);
1326                         */
1327                 }
1328                 else if(scene->r.cfra < smd->time)
1329                 {
1330                         smd->time = scene->r.cfra;
1331                         smokeModifier_reset(smd);
1332                 }
1333         }
1334         else if(smd->type & MOD_SMOKE_TYPE_COLL)
1335         {
1336                 if(scene->r.cfra >= smd->time)
1337                         smokeModifier_init(smd, ob, scene, dm);
1338
1339                 if(scene->r.cfra > smd->time)
1340                 {
1341                         // XXX TODO
1342                         smd->time = scene->r.cfra;
1343                         
1344                         if(smd->coll->dm)
1345                                 smd->coll->dm->release(smd->coll->dm);
1346
1347                         smd->coll->dm = CDDM_copy(dm);
1348
1349                         // rigid movement support
1350                         copy_m4_m4(smd->coll->mat_old, smd->coll->mat);
1351                         copy_m4_m4(smd->coll->mat, ob->obmat);
1352                 }
1353                 else if(scene->r.cfra < smd->time)
1354                 {
1355                         smd->time = scene->r.cfra;
1356                         smokeModifier_reset(smd);
1357                 }
1358         }
1359         else if(smd->type & MOD_SMOKE_TYPE_DOMAIN)
1360         {
1361                 SmokeDomainSettings *sds = smd->domain;
1362                 float light[3]; 
1363                 PointCache *cache = NULL;
1364                 PTCacheID pid;
1365                 int startframe, endframe, framenr;
1366                 float timescale;
1367
1368                 framenr = scene->r.cfra;
1369
1370                 //printf("time: %d\n", scene->r.cfra);
1371
1372                 cache = sds->point_cache[0];
1373                 BKE_ptcache_id_from_smoke(&pid, ob, smd);
1374                 BKE_ptcache_id_time(&pid, scene, framenr, &startframe, &endframe, &timescale);
1375
1376                 if(!smd->domain->fluid || framenr == startframe)
1377                 {
1378                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1379                         BKE_ptcache_validate(cache, framenr);
1380                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1381                 }
1382
1383                 if(!smd->domain->fluid && (framenr != startframe) && (smd->domain->flags & MOD_SMOKE_FILE_LOAD)==0 && (cache->flag & PTCACHE_BAKED)==0)
1384                         return;
1385
1386                 smd->domain->flags &= ~MOD_SMOKE_FILE_LOAD;
1387
1388                 CLAMP(framenr, startframe, endframe);
1389
1390                 /* If already viewing a pre/after frame, no need to reload */
1391                 if ((smd->time == framenr) && (framenr != scene->r.cfra))
1392                         return;
1393
1394                 // printf("startframe: %d, framenr: %d\n", startframe, framenr);
1395
1396                 if(smokeModifier_init(smd, ob, scene, dm)==0)
1397                 {
1398                         printf("bad smokeModifier_init\n");
1399                         return;
1400                 }
1401
1402                 /* try to read from cache */
1403                 if(BKE_ptcache_read(&pid, (float)framenr) == PTCACHE_READ_EXACT) {
1404                         BKE_ptcache_validate(cache, framenr);
1405                         smd->time = framenr;
1406                         return;
1407                 }
1408                 
1409                 /* only calculate something when we advanced a single frame */
1410                 if(framenr != (int)smd->time+1)
1411                         return;
1412
1413                 /* don't simulate if viewing start frame, but scene frame is not real start frame */
1414                 if (framenr != scene->r.cfra)
1415                         return;
1416
1417                 tstart();
1418
1419                 smoke_calc_domain(scene, ob, smd);
1420
1421                 /* if on second frame, write cache for first frame */
1422                 if((int)smd->time == startframe && (cache->flag & PTCACHE_OUTDATED || cache->last_exact==0)) {
1423                         // create shadows straight after domain initialization so we get nice shadows for startframe, too
1424                         if(get_lamp(scene, light))
1425                                 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);
1426
1427                         if(sds->wt)
1428                         {
1429                                 if(sds->flags & MOD_SMOKE_DISSOLVE)
1430                                         smoke_dissolve_wavelet(sds->wt, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
1431                                 smoke_turbulence_step(sds->wt, sds->fluid);
1432                         }
1433
1434                         BKE_ptcache_write(&pid, startframe);
1435                 }
1436                 
1437                 // set new time
1438                 smd->time = scene->r.cfra;
1439
1440                 /* do simulation */
1441
1442                 // low res
1443
1444                 // simulate the actual smoke (c++ code in intern/smoke)
1445                 // DG: interesting commenting this line + deactivating loading of noise files
1446                 if(framenr!=startframe)
1447                 {
1448                         if(sds->flags & MOD_SMOKE_DISSOLVE)
1449                                 smoke_dissolve(sds->fluid, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
1450                         smoke_step(sds->fluid, smd->time, scene->r.frs_sec / scene->r.frs_sec_base);
1451                 }
1452
1453                 // create shadows before writing cache so they get stored
1454                 if(get_lamp(scene, light))
1455                         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);
1456
1457                 if(sds->wt)
1458                 {
1459                         if(sds->flags & MOD_SMOKE_DISSOLVE)
1460                                 smoke_dissolve_wavelet(sds->wt, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
1461                         smoke_turbulence_step(sds->wt, sds->fluid);
1462                 }
1463         
1464                 BKE_ptcache_validate(cache, framenr);
1465                 if(framenr != startframe)
1466                         BKE_ptcache_write(&pid, framenr);
1467
1468                 tend();
1469                 //printf ( "Frame: %d, Time: %f\n", (int)smd->time, ( float ) tval() );
1470         }
1471 }
1472
1473 static float calc_voxel_transp(float *result, float *input, int res[3], int *pixel, float *tRay, float correct)
1474 {
1475         const size_t index = smoke_get_index(pixel[0], res[0], pixel[1], res[1], pixel[2]);
1476
1477         // T_ray *= T_vox
1478         *tRay *= exp(input[index]*correct);
1479         
1480         if(result[index] < 0.0f)        
1481         {
1482 #pragma omp critical            
1483                 result[index] = *tRay;  
1484         }       
1485
1486         return *tRay;
1487 }
1488
1489 long long smoke_get_mem_req(int xres, int yres, int zres, int amplify)
1490 {
1491         int totalCells = xres * yres * zres;
1492         int amplifiedCells = totalCells * amplify * amplify * amplify;
1493
1494         // print out memory requirements
1495         long long int coarseSize = sizeof(float) * totalCells * 22 +
1496         sizeof(unsigned char) * totalCells;
1497
1498         long long int fineSize = sizeof(float) * amplifiedCells * 7 + // big grids
1499         sizeof(float) * totalCells * 8 +     // small grids
1500         sizeof(float) * 128 * 128 * 128;     // noise tile
1501
1502         long long int totalMB = (coarseSize + fineSize) / (1024 * 1024);
1503
1504         return totalMB;
1505 }
1506
1507 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)
1508 {
1509         int dx, dy, dz, i, l, m, n, x_inc, y_inc, z_inc, err_1, err_2, dx2, dy2, dz2;
1510         int pixel[3];
1511
1512         pixel[0] = x1;
1513         pixel[1] = y1;
1514         pixel[2] = z1;
1515
1516         dx = x2 - x1;
1517         dy = y2 - y1;
1518         dz = z2 - z1;
1519
1520         x_inc = (dx < 0) ? -1 : 1;
1521         l = abs(dx);
1522         y_inc = (dy < 0) ? -1 : 1;
1523         m = abs(dy);
1524         z_inc = (dz < 0) ? -1 : 1;
1525         n = abs(dz);
1526         dx2 = l << 1;
1527         dy2 = m << 1;
1528         dz2 = n << 1;
1529
1530         if ((l >= m) && (l >= n)) {
1531                 err_1 = dy2 - l;
1532                 err_2 = dz2 - l;
1533                 for (i = 0; i < l; i++) {
1534                         if(cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
1535                                 break;
1536                         if (err_1 > 0) {
1537                                 pixel[1] += y_inc;
1538                                 err_1 -= dx2;
1539                         }
1540                         if (err_2 > 0) {
1541                                 pixel[2] += z_inc;
1542                                 err_2 -= dx2;
1543                         }
1544                         err_1 += dy2;
1545                         err_2 += dz2;
1546                         pixel[0] += x_inc;
1547                 }
1548         } else if ((m >= l) && (m >= n)) {
1549                 err_1 = dx2 - m;
1550                 err_2 = dz2 - m;
1551                 for (i = 0; i < m; i++) {
1552                         if(cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
1553                                 break;
1554                         if (err_1 > 0) {
1555                                 pixel[0] += x_inc;
1556                                 err_1 -= dy2;
1557                         }
1558                         if (err_2 > 0) {
1559                                 pixel[2] += z_inc;
1560                                 err_2 -= dy2;
1561                         }
1562                         err_1 += dx2;
1563                         err_2 += dz2;
1564                         pixel[1] += y_inc;
1565                 }
1566         } else {
1567                 err_1 = dy2 - n;
1568                 err_2 = dx2 - n;
1569                 for (i = 0; i < n; i++) {
1570                         if(cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
1571                                 break;
1572                         if (err_1 > 0) {
1573                                 pixel[1] += y_inc;
1574                                 err_1 -= dz2;
1575                         }
1576                         if (err_2 > 0) {
1577                                 pixel[0] += x_inc;
1578                                 err_2 -= dz2;
1579                         }
1580                         err_1 += dy2;
1581                         err_2 += dx2;
1582                         pixel[2] += z_inc;
1583                 }
1584         }
1585         cb(result, input, res, pixel, tRay, correct);
1586 }
1587
1588 static void get_cell(float *p0, int res[3], float dx, float *pos, int *cell, int correct)
1589 {
1590         float tmp[3];
1591
1592         VECSUB(tmp, pos, p0);
1593         mul_v3_fl(tmp, 1.0 / dx);
1594
1595         if(correct)
1596         {
1597                 cell[0] = MIN2(res[0] - 1, MAX2(0, (int)floor(tmp[0])));
1598                 cell[1] = MIN2(res[1] - 1, MAX2(0, (int)floor(tmp[1])));
1599                 cell[2] = MIN2(res[2] - 1, MAX2(0, (int)floor(tmp[2])));
1600         }
1601         else
1602         {
1603                 cell[0] = (int)floor(tmp[0]);
1604                 cell[1] = (int)floor(tmp[1]);
1605                 cell[2] = (int)floor(tmp[2]);
1606         }
1607 }
1608
1609 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)
1610 {
1611         float bv[6];
1612         int a, z, slabsize=res[0]*res[1], size= res[0]*res[1]*res[2];
1613
1614         for(a=0; a<size; a++)
1615                 result[a]= -1.0f;
1616
1617         bv[0] = p0[0];
1618         bv[1] = p1[0];
1619         // y
1620         bv[2] = p0[1];
1621         bv[3] = p1[1];
1622         // z
1623         bv[4] = p0[2];
1624         bv[5] = p1[2];
1625
1626 #pragma omp parallel for schedule(static,1)
1627         for(z = 0; z < res[2]; z++)
1628         {
1629                 size_t index = z*slabsize;
1630                 int x,y;
1631
1632                 for(y = 0; y < res[1]; y++)
1633                         for(x = 0; x < res[0]; x++, index++)
1634                         {
1635                                 float voxelCenter[3];
1636                                 float pos[3];
1637                                 int cell[3];
1638                                 float tRay = 1.0;
1639
1640                                 if(result[index] >= 0.0f)                                       
1641                                         continue;                                                               
1642                                 voxelCenter[0] = p0[0] + dx *  x + dx * 0.5;
1643                                 voxelCenter[1] = p0[1] + dx *  y + dx * 0.5;
1644                                 voxelCenter[2] = p0[2] + dx *  z + dx * 0.5;
1645
1646                                 // get starting position (in voxel coords)
1647                                 if(BLI_bvhtree_bb_raycast(bv, light, voxelCenter, pos) > FLT_EPSILON)
1648                                 {
1649                                         // we're ouside
1650                                         get_cell(p0, res, dx, pos, cell, 1);
1651                                 }
1652                                 else
1653                                 {
1654                                         // we're inside
1655                                         get_cell(p0, res, dx, light, cell, 1);
1656                                 }
1657
1658                                 bresenham_linie_3D(cell[0], cell[1], cell[2], x, y, z, &tRay, cb, result, input, res, correct);
1659
1660                                 // convention -> from a RGBA float array, use G value for tRay
1661 // #pragma omp critical
1662                                 result[index] = tRay;                   
1663                         }
1664         }
1665 }
1666
1667 #endif /* WITH_SMOKE */