source/blender/render/intern/source/voxeldata.c

   1 /*
   2  *
   3  * ***** BEGIN GPL LICENSE BLOCK *****
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  *
  19  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
  20  * All rights reserved.
  21  *
  22  * The Original Code is: all of this file.
  23  *
  24  * Contributor(s): Raul Fernandez Hernandez (Farsthary), Matt Ebb.
  25  *
  26  * ***** END GPL LICENSE BLOCK *****
  27  */
  28
  29 /** \file blender/render/intern/source/voxeldata.c
  30  *  \ingroup render
  31  */
  32
  33
  34 #include <math.h>
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37
  38 #include "MEM_guardedalloc.h"
  39
  40 #include "BLI_math.h"
  41 #include "BLI_blenlib.h"
  42 #include "BLI_voxel.h"
  43 #include "BLI_utildefines.h"
  44
  45 #include "IMB_imbuf.h"
  46 #include "IMB_imbuf_types.h"
  47
  48 #include "BKE_global.h"
  49 #include "BKE_image.h"
  50 #include "BKE_main.h"
  51 #include "BKE_modifier.h"
  52
  53 #include "smoke_API.h"
  54
  55 #include "DNA_texture_types.h"
  56 #include "DNA_object_force.h"
  57 #include "DNA_object_types.h"
  58 #include "DNA_modifier_types.h"
  59 #include "DNA_smoke_types.h"
  60
  61
  62 #include "render_types.h"
  63 #include "renderdatabase.h"
  64 #include "texture.h"
  65 #include "voxeldata.h"
  66
  67 static int is_vd_res_ok(VoxelData *vd)
  68 {
  69         /* arbitrary large value so corrupt headers dont break */
  70         const int min= 1, max= 100000;
  71         return  (vd->resol[0] >= min && vd->resol[0] <= max) &&
  72                         (vd->resol[1] >= min && vd->resol[1] <= max) &&
  73                         (vd->resol[2] >= min && vd->resol[2] <= max);
  74 }
  75
  76 /* use size_t because the result may exceed INT_MAX */
  77 static size_t vd_resol_size(VoxelData *vd)
  78 {
  79         return (size_t)vd->resol[0] * (size_t)vd->resol[1] * (size_t)vd->resol[2];
  80 }
  81
  82 static int load_frame_blendervoxel(VoxelData *vd, FILE *fp, int frame)
  83 {
  84         const size_t size = vd_resol_size(vd);
  85         size_t offset = sizeof(VoxelDataHeader);
  86
  87         if(is_vd_res_ok(vd) == FALSE)
  88                 return 0;
  89
  90         vd->dataset = MEM_mapallocN(sizeof(float)*size, "voxel dataset");
  91         if(vd->dataset == NULL) return 0;
  92
  93         if(fseek(fp, frame*size*sizeof(float)+offset, 0) == -1)
  94                 return 0;
  95         if(fread(vd->dataset, sizeof(float), size, fp) != size)
  96                 return 0;
  97
  98         vd->cachedframe = frame;
  99         vd->ok = 1;
 100         return 1;
 101 }
 102
 103 static int load_frame_raw8(VoxelData *vd, FILE *fp, int frame)
 104 {
 105         const size_t size = vd_resol_size(vd);
 106         char *data_c;
 107         int i;
 108
 109         if(is_vd_res_ok(vd) == FALSE)
 110                 return 0;
 111
 112         vd->dataset = MEM_mapallocN(sizeof(float)*size, "voxel dataset");
 113         if(vd->dataset == NULL) return 0;
 114         data_c = (char *)MEM_mallocN(sizeof(char)*size, "temporary voxel file reading storage");
 115         if(data_c == NULL) {
 116                 MEM_freeN(vd->dataset);
 117                 vd->dataset= NULL;
 118                 return 0;
 119         }
 120
 121         if(fseek(fp,(frame-1)*size*sizeof(char),0) == -1) {
 122                 MEM_freeN(data_c);
 123                 MEM_freeN(vd->dataset);
 124                 vd->dataset= NULL;
 125                 return 0;
 126         }
 127         if(fread(data_c, sizeof(char), size, fp) != size) {
 128                 MEM_freeN(data_c);
 129                 MEM_freeN(vd->dataset);
 130                 vd->dataset= NULL;
 131                 return 0;
 132         }
 133
 134         for (i=0; i<size; i++) {
 135                 vd->dataset[i] = (float)data_c[i] / 255.f;
 136         }
 137         MEM_freeN(data_c);
 138
 139         vd->cachedframe = frame;
 140         vd->ok = 1;
 141         return 1;
 142 }
 143
 144 static void load_frame_image_sequence(VoxelData *vd, Tex *tex)
 145 {
 146         ImBuf *ibuf;
 147         Image *ima = tex->ima;
 148         ImageUser *tiuser = &tex->iuser;
 149         ImageUser iuser = *(tiuser);
 150         int x=0, y=0, z=0;
 151         float *rf;
 152
 153         if (!ima || !tiuser) return;
 154         if (iuser.frames == 0) return;
 155
 156         ima->source = IMA_SRC_SEQUENCE;
 157         iuser.framenr = 1 + iuser.offset;
 158
 159         /* find the first valid ibuf and use it to initialise the resolution of the data set */
 160         /* need to do this in advance so we know how much memory to allocate */
 161         ibuf= BKE_image_get_ibuf(ima, &iuser);
 162         while (!ibuf && (iuser.framenr < iuser.frames)) {
 163                 iuser.framenr++;
 164                 ibuf= BKE_image_get_ibuf(ima, &iuser);
 165         }
 166         if (!ibuf) return;
 167         if (!ibuf->rect_float) IMB_float_from_rect(ibuf);
 168
 169         vd->flag |= TEX_VD_STILL;
 170         vd->resol[0] = ibuf->x;
 171         vd->resol[1] = ibuf->y;
 172         vd->resol[2] = iuser.frames;
 173         vd->dataset = MEM_mapallocN(sizeof(float)*vd_resol_size(vd), "voxel dataset");
 174
 175         for (z=0; z < iuser.frames; z++)
 176         {
 177                 /* get a new ibuf for each frame */
 178                 if (z > 0) {
 179                         iuser.framenr++;
 180                         ibuf= BKE_image_get_ibuf(ima, &iuser);
 181                         if (!ibuf) break;
 182                         if (!ibuf->rect_float) IMB_float_from_rect(ibuf);
 183                 }
 184                 rf = ibuf->rect_float;
 185
 186                 for (y=0; y < ibuf->y; y++)
 187                 {
 188                         for (x=0; x < ibuf->x; x++)
 189                         {
 190                                 /* currently averaged to monchrome */
 191                                 vd->dataset[ V_I(x, y, z, vd->resol) ] = (rf[0] + rf[1] + rf[2])*0.333f;
 192                                 rf +=4;
 193                         }
 194                 }
 195
 196                 BKE_image_free_anim_ibufs(ima, iuser.framenr);
 197         }
 198
 199         vd->ok = 1;
 200         return;
 201 }
 202
 203 static int read_voxeldata_header(FILE *fp, struct VoxelData *vd)
 204 {
 205         VoxelDataHeader *h=(VoxelDataHeader *)MEM_mallocN(sizeof(VoxelDataHeader), "voxel data header");
 206
 207         rewind(fp);
 208         if(fread(h,sizeof(VoxelDataHeader),1,fp) != 1) {
 209                 MEM_freeN(h);
 210                 return 0;
 211         }
 212
 213         vd->resol[0]=h->resolX;
 214         vd->resol[1]=h->resolY;
 215         vd->resol[2]=h->resolZ;
 216
 217         MEM_freeN(h);
 218         return 1;
 219 }
 220
 221 static void init_frame_smoke(VoxelData *vd, float cfra)
 222 {
 223         Object *ob;
 224         ModifierData *md;
 225
 226         vd->dataset = NULL;
 227         if (vd->object == NULL) return;
 228         ob= vd->object;
 229
 230         /* draw code for smoke */
 231         if( (md = (ModifierData *)modifiers_findByType(ob, eModifierType_Smoke)) )
 232         {
 233                 SmokeModifierData *smd = (SmokeModifierData *)md;
 234
 235
 236                 if(smd->domain && smd->domain->fluid) {
 237                         if(cfra < smd->domain->point_cache[0]->startframe)
 238                                 ; /* don't show smoke before simulation starts, this could be made an option in the future */
 239                         else if (vd->smoked_type == TEX_VD_SMOKEHEAT) {
 240                                 size_t totRes;
 241                                 size_t i;
 242                                 float *heat;
 243
 244                                 VECCOPY(vd->resol, smd->domain->res);
 245                                 totRes= vd_resol_size(vd);
 246
 247                                 // scaling heat values from -2.0-2.0 to 0.0-1.0
 248                                 vd->dataset = MEM_mapallocN(sizeof(float)*(totRes), "smoke data");
 249
 250
 251                                 heat = smoke_get_heat(smd->domain->fluid);
 252
 253                                 for (i=0; i<totRes; i++)
 254                                 {
 255                                         vd->dataset[i] = (heat[i]+2.0f)/4.0f;
 256                                 }
 257
 258                                 //vd->dataset = smoke_get_heat(smd->domain->fluid);
 259                         }
 260                         else if (vd->smoked_type == TEX_VD_SMOKEVEL) {
 261                                 size_t totRes;
 262                                 size_t i;
 263                                 float *xvel, *yvel, *zvel;
 264
 265                                 VECCOPY(vd->resol, smd->domain->res);
 266                                 totRes= vd_resol_size(vd);
 267
 268                                 // scaling heat values from -2.0-2.0 to 0.0-1.0
 269                                 vd->dataset = MEM_mapallocN(sizeof(float)*(totRes), "smoke data");
 270
 271                                 xvel = smoke_get_velocity_x(smd->domain->fluid);
 272                                 yvel = smoke_get_velocity_y(smd->domain->fluid);
 273                                 zvel = smoke_get_velocity_z(smd->domain->fluid);
 274
 275                                 for (i=0; i<totRes; i++)
 276                                 {
 277                                         vd->dataset[i] = sqrt(xvel[i]*xvel[i] + yvel[i]*yvel[i] + zvel[i]*zvel[i])*3.0f;
 278                                 }
 279
 280                         }
 281                         else {
 282                                 size_t totRes;
 283                                 float *density;
 284
 285                                 if (smd->domain->flags & MOD_SMOKE_HIGHRES) {
 286                                         smoke_turbulence_get_res(smd->domain->wt, vd->resol);
 287                                         density = smoke_turbulence_get_density(smd->domain->wt);
 288                                 } else {
 289                                         VECCOPY(vd->resol, smd->domain->res);
 290                                         density = smoke_get_density(smd->domain->fluid);
 291                                 }
 292
 293                                 /* TODO: is_vd_res_ok(rvd) doesnt check this resolution */
 294                                 totRes= vd_resol_size(vd);
 295                                 /* always store copy, as smoke internal data can change */
 296                                 vd->dataset = MEM_mapallocN(sizeof(float)*(totRes), "smoke data");
 297                                 memcpy(vd->dataset, density, sizeof(float)*totRes);
 298                         } // end of fluid condition
 299                 }
 300         }
 301
 302         vd->ok = 1;
 303         return;
 304 }
 305
 306 static void cache_voxeldata(struct Render *re, Tex *tex)
 307 {
 308         VoxelData *vd = tex->vd;
 309         FILE *fp;
 310         int curframe;
 311         char path[sizeof(vd->source_path)];
 312
 313         /* only re-cache if dataset needs updating */
 314         if ((vd->flag & TEX_VD_STILL) || (vd->cachedframe == re->r.cfra))
 315                 if (vd->ok) return;
 316
 317         /* clear out old cache, ready for new */
 318         if (vd->dataset) {
 319                 MEM_freeN(vd->dataset);
 320                 vd->dataset = NULL;
 321         }
 322
 323         if (vd->flag & TEX_VD_STILL)
 324                 curframe = vd->still_frame;
 325         else
 326                 curframe = re->r.cfra;
 327
 328         BLI_strncpy(path, vd->source_path, sizeof(path));
 329
 330         switch(vd->file_format) {
 331                 case TEX_VD_IMAGE_SEQUENCE:
 332                         load_frame_image_sequence(vd, tex);
 333                         return;
 334                 case TEX_VD_SMOKE:
 335                         init_frame_smoke(vd, re->r.cfra);
 336                         return;
 337                 case TEX_VD_BLENDERVOXEL:
 338                         BLI_path_abs(path, G.main->name);
 339                         if (!BLI_exists(path)) return;
 340                         fp = fopen(path,"rb");
 341                         if (!fp) return;
 342
 343                         if(read_voxeldata_header(fp, vd))
 344                                 load_frame_blendervoxel(vd, fp, curframe-1);
 345
 346                         fclose(fp);
 347                         return;
 348                 case TEX_VD_RAW_8BIT:
 349                         BLI_path_abs(path, G.main->name);
 350                         if (!BLI_exists(path)) return;
 351                         fp = fopen(path,"rb");
 352                         if (!fp) return;
 353
 354                         load_frame_raw8(vd, fp, curframe);
 355                         fclose(fp);
 356                         return;
 357         }
 358 }
 359
 360 void make_voxeldata(struct Render *re)
 361 {
 362         Tex *tex;
 363
 364         re->i.infostr= "Loading voxel datasets";
 365         re->stats_draw(re->sdh, &re->i);
 366
 367         /* XXX: should be doing only textures used in this render */
 368         for (tex= re->main->tex.first; tex; tex= tex->id.next) {
 369                 if(tex->id.us && tex->type==TEX_VOXELDATA) {
 370                         cache_voxeldata(re, tex);
 371                 }
 372         }
 373
 374         re->i.infostr= NULL;
 375         re->stats_draw(re->sdh, &re->i);
 376
 377 }
 378
 379 int voxeldatatex(struct Tex *tex, float *texvec, struct TexResult *texres)
 380 {
 381         int retval = TEX_INT;
 382         VoxelData *vd = tex->vd;
 383         float co[3], offset[3] = {0.5, 0.5, 0.5};
 384
 385         if ((!vd) || (vd->dataset==NULL)) {
 386                 texres->tin = 0.0f;
 387                 return 0;
 388         }
 389
 390         /* scale lookup from 0.0-1.0 (original location) to -1.0, 1.0, consistent with image texture tex coords */
 391         /* in implementation this works backwards, bringing sample locations from -1.0, 1.0
 392          * to the range 0.0, 1.0, before looking up in the voxel structure. */
 393         copy_v3_v3(co, texvec);
 394         mul_v3_fl(co, 0.5f);
 395         add_v3_v3(co, offset);
 396
 397         /* co is now in the range 0.0, 1.0 */
 398         switch (vd->extend) {
 399                 case TEX_CLIP:
 400                 {
 401                         if ((co[0] < 0.f || co[0] > 1.f) || (co[1] < 0.f || co[1] > 1.f) || (co[2] < 0.f || co[2] > 1.f)) {
 402                                 texres->tin = 0.f;
 403                                 return retval;
 404                         }
 405                         break;
 406                 }
 407                 case TEX_REPEAT:
 408                 {
 409                         co[0] = co[0] - floor(co[0]);
 410                         co[1] = co[1] - floor(co[1]);
 411                         co[2] = co[2] - floor(co[2]);
 412                         break;
 413                 }
 414                 case TEX_EXTEND:
 415                 {
 416                         CLAMP(co[0], 0.f, 1.f);
 417                         CLAMP(co[1], 0.f, 1.f);
 418                         CLAMP(co[2], 0.f, 1.f);
 419                         break;
 420                 }
 421         }
 422
 423         switch (vd->interp_type) {
 424                 case TEX_VD_NEARESTNEIGHBOR:
 425                         texres->tin = voxel_sample_nearest(vd->dataset, vd->resol, co);
 426                         break;
 427                 case TEX_VD_LINEAR:
 428                         texres->tin = voxel_sample_trilinear(vd->dataset, vd->resol, co);
 429                         break;
 430                 case TEX_VD_QUADRATIC:
 431                         texres->tin = voxel_sample_triquadratic(vd->dataset, vd->resol, co);
 432                         break;
 433                 case TEX_VD_TRICUBIC_CATROM:
 434                 case TEX_VD_TRICUBIC_BSPLINE:
 435                         texres->tin = voxel_sample_tricubic(vd->dataset, vd->resol, co, (vd->interp_type == TEX_VD_TRICUBIC_BSPLINE));
 436                         break;
 437         }
 438
 439         texres->tin *= vd->int_multiplier;
 440         BRICONT;
 441
 442         texres->tr = texres->tin;
 443         texres->tg = texres->tin;
 444         texres->tb = texres->tin;
 445         texres->ta = texres->tin;
 446         BRICONTRGB;
 447
 448         return retval;
 449 }
 450
 451