source/blender/render/intern/source/convertblender.c

   1 /**
   2  * $Id$
   3  *
   4  * ***** BEGIN GPL LICENSE BLOCK *****
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  *
  20  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
  21  * All rights reserved.
  22  *
  23  * Contributors: 2004/2005/2006 Blender Foundation, full recode
  24  *
  25  * ***** END GPL LICENSE BLOCK *****
  26  */
  27
  28 #include <math.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <limits.h>
  33
  34
  35
  36 #include "MEM_guardedalloc.h"
  37
  38 #include "BLI_arithb.h"
  39 #include "BLI_blenlib.h"
  40 #include "BLI_rand.h"
  41 #include "BLI_memarena.h"
  42 #include "BLI_ghash.h"
  43
  44 #include "DNA_armature_types.h"
  45 #include "DNA_camera_types.h"
  46 #include "DNA_material_types.h"
  47 #include "DNA_curve_types.h"
  48 #include "DNA_effect_types.h"
  49 #include "DNA_group_types.h"
  50 #include "DNA_lamp_types.h"
  51 #include "DNA_image_types.h"
  52 #include "DNA_lattice_types.h"
  53 #include "DNA_mesh_types.h"
  54 #include "DNA_meshdata_types.h"
  55 #include "DNA_meta_types.h"
  56 #include "DNA_modifier_types.h"
  57 #include "DNA_node_types.h"
  58 #include "DNA_object_types.h"
  59 #include "DNA_object_force.h"
  60 #include "DNA_object_fluidsim.h"
  61 #include "DNA_particle_types.h"
  62 #include "DNA_scene_types.h"
  63 #include "DNA_texture_types.h"
  64 #include "DNA_view3d_types.h"
  65
  66 #include "BKE_anim.h"
  67 #include "BKE_armature.h"
  68 #include "BKE_action.h"
  69 #include "BKE_curve.h"
  70 #include "BKE_customdata.h"
  71 #include "BKE_colortools.h"
  72 #include "BKE_constraint.h"
  73 #include "BKE_displist.h"
  74 #include "BKE_deform.h"
  75 #include "BKE_DerivedMesh.h"
  76 #include "BKE_effect.h"
  77 #include "BKE_global.h"
  78 #include "BKE_group.h"
  79 #include "BKE_key.h"
  80 #include "BKE_ipo.h"
  81 #include "BKE_image.h"
  82 #include "BKE_lattice.h"
  83 #include "BKE_library.h"
  84 #include "BKE_material.h"
  85 #include "BKE_main.h"
  86 #include "BKE_mball.h"
  87 #include "BKE_mesh.h"
  88 #include "BKE_modifier.h"
  89 #include "BKE_node.h"
  90 #include "BKE_object.h"
  91 #include "BKE_particle.h"
  92 #include "BKE_scene.h"
  93 #include "BKE_subsurf.h"
  94 #include "BKE_texture.h"
  95 #include "BKE_utildefines.h"
  96 #include "BKE_world.h"
  97
  98 #include "PIL_time.h"
  99 #include "IMB_imbuf_types.h"
 100
 101 #include "envmap.h"
 102 #include "occlusion.h"
 103 #include "pointdensity.h"
 104 #include "voxeldata.h"
 105 #include "render_types.h"
 106 #include "rendercore.h"
 107 #include "renderdatabase.h"
 108 #include "renderpipeline.h"
 109 #include "shadbuf.h"
 110 #include "shading.h"
 111 #include "strand.h"
 112 #include "texture.h"
 113 #include "volume_precache.h"
 114 #include "sss.h"
 115 #include "strand.h"
 116 #include "zbuf.h"
 117 #include "sunsky.h"
 118
 119
 120 /* 10 times larger than normal epsilon, test it on default nurbs sphere with ray_transp (for quad detection) */
 121 /* or for checking vertex normal flips */
 122 #define FLT_EPSILON10 1.19209290e-06F
 123
 124 /* ------------------------------------------------------------------------- */
 125
 126 /* Stuff for stars. This sits here because it uses gl-things. Part of
 127 this code may move down to the converter.  */
 128 /* ------------------------------------------------------------------------- */
 129 /* this is a bad beast, since it is misused by the 3d view drawing as well. */
 130
 131 static HaloRen *initstar(Render *re, ObjectRen *obr, float *vec, float hasize)
 132 {
 133         HaloRen *har;
 134         float hoco[4];
 135
 136         projectverto(vec, re->winmat, hoco);
 137
 138         har= RE_findOrAddHalo(obr, obr->tothalo++);
 139
 140         /* projectvert is done in function zbufvlaggen again, because of parts */
 141         VECCOPY(har->co, vec);
 142         har->hasize= hasize;
 143
 144         har->zd= 0.0;
 145
 146         return har;
 147 }
 148
 149 /* there must be a 'fixed' amount of stars generated between
 150 *         near and far
 151 * all stars must by preference lie on the far and solely
 152 *        differ in clarity/color
 153 */
 154
 155 void RE_make_stars(Render *re, Scene *scenev3d, void (*initfunc)(void),
 156                                    void (*vertexfunc)(float*),  void (*termfunc)(void))
 157 {
 158         extern unsigned char hash[512];
 159         ObjectRen *obr= NULL;
 160         World *wrld= NULL;
 161         HaloRen *har;
 162         Scene *scene;
 163         Camera *camera;
 164         double dblrand, hlfrand;
 165         float vec[4], fx, fy, fz;
 166         float fac, starmindist, clipend;
 167         float mat[4][4], stargrid, maxrand, maxjit, force, alpha;
 168         int x, y, z, sx, sy, sz, ex, ey, ez, done = 0;
 169
 170         if(initfunc) {
 171                 scene= scenev3d;
 172                 wrld= scene->world;
 173         }
 174         else {
 175                 scene= re->scene;
 176                 wrld= &(re->wrld);
 177         }
 178
 179         stargrid = wrld->stardist;                      /* distance between stars */
 180         maxrand = 2.0;                                          /* amount a star can be shifted (in grid units) */
 181         maxjit = (wrld->starcolnoise);          /* amount a color is being shifted */
 182
 183         /* size of stars */
 184         force = ( wrld->starsize );
 185
 186         /* minimal free space (starting at camera) */
 187         starmindist= wrld->starmindist;
 188
 189         if (stargrid <= 0.10) return;
 190
 191         if (re) re->flag |= R_HALO;
 192         else stargrid *= 1.0;                           /* then it draws fewer */
 193
 194         if(re) Mat4Invert(mat, re->viewmat);
 195         else Mat4One(mat);
 196
 197         /* BOUNDING BOX CALCULATION
 198                 * bbox goes from z = loc_near_var | loc_far_var,
 199                 * x = -z | +z,
 200                 * y = -z | +z
 201                 */
 202
 203         if(scene->camera==NULL)
 204                 return;
 205         camera = scene->camera->data;
 206         clipend = camera->clipend;
 207
 208         /* convert to grid coordinates */
 209
 210         sx = ((mat[3][0] - clipend) / stargrid) - maxrand;
 211         sy = ((mat[3][1] - clipend) / stargrid) - maxrand;
 212         sz = ((mat[3][2] - clipend) / stargrid) - maxrand;
 213
 214         ex = ((mat[3][0] + clipend) / stargrid) + maxrand;
 215         ey = ((mat[3][1] + clipend) / stargrid) + maxrand;
 216         ez = ((mat[3][2] + clipend) / stargrid) + maxrand;
 217
 218         dblrand = maxrand * stargrid;
 219         hlfrand = 2.0 * dblrand;
 220
 221         if (initfunc) {
 222                 initfunc();
 223         }
 224
 225         if(re) /* add render object for stars */
 226                 obr= RE_addRenderObject(re, NULL, NULL, 0, 0, 0);
 227
 228         for (x = sx, fx = sx * stargrid; x <= ex; x++, fx += stargrid) {
 229                 for (y = sy, fy = sy * stargrid; y <= ey ; y++, fy += stargrid) {
 230                         for (z = sz, fz = sz * stargrid; z <= ez; z++, fz += stargrid) {
 231
 232                                 BLI_srand((hash[z & 0xff] << 24) + (hash[y & 0xff] << 16) + (hash[x & 0xff] << 8));
 233                                 vec[0] = fx + (hlfrand * BLI_drand()) - dblrand;
 234                                 vec[1] = fy + (hlfrand * BLI_drand()) - dblrand;
 235                                 vec[2] = fz + (hlfrand * BLI_drand()) - dblrand;
 236                                 vec[3] = 1.0;
 237
 238                                 if (vertexfunc) {
 239                                         if(done & 1) vertexfunc(vec);
 240                                         done++;
 241                                 }
 242                                 else {
 243                                         Mat4MulVecfl(re->viewmat, vec);
 244
 245                                         /* in vec are global coordinates
 246                                         * calculate distance to camera
 247                                         * and using that, define the alpha
 248                                         */
 249
 250                                         {
 251                                                 float tx, ty, tz;
 252
 253                                                 tx = vec[0];
 254                                                 ty = vec[1];
 255                                                 tz = vec[2];
 256
 257                                                 alpha = sqrt(tx * tx + ty * ty + tz * tz);
 258
 259                                                 if (alpha >= clipend) alpha = 0.0;
 260                                                 else if (alpha <= starmindist) alpha = 0.0;
 261                                                 else if (alpha <= 2.0 * starmindist) {
 262                                                         alpha = (alpha - starmindist) / starmindist;
 263                                                 } else {
 264                                                         alpha -= 2.0 * starmindist;
 265                                                         alpha /= (clipend - 2.0 * starmindist);
 266                                                         alpha = 1.0 - alpha;
 267                                                 }
 268                                         }
 269
 270
 271                                         if (alpha != 0.0) {
 272                                                 fac = force * BLI_drand();
 273
 274                                                 har = initstar(re, obr, vec, fac);
 275
 276                                                 if (har) {
 277                                                         har->alfa = sqrt(sqrt(alpha));
 278                                                         har->add= 255;
 279                                                         har->r = har->g = har->b = 1.0;
 280                                                         if (maxjit) {
 281                                                                 har->r += ((maxjit * BLI_drand()) ) - maxjit;
 282                                                                 har->g += ((maxjit * BLI_drand()) ) - maxjit;
 283                                                                 har->b += ((maxjit * BLI_drand()) ) - maxjit;
 284                                                         }
 285                                                         har->hard = 32;
 286                                                         har->lay= -1;
 287                                                         har->type |= HA_ONLYSKY;
 288                                                         done++;
 289                                                 }
 290                                         }
 291                                 }
 292                         }
 293                         /* do not call blender_test_break() here, since it is used in UI as well, confusing the callback system */
 294                         /* main cause is G.afbreek of course, a global again... (ton) */
 295                 }
 296         }
 297         if (termfunc) termfunc();
 298
 299         if(obr)
 300                 re->tothalo += obr->tothalo;
 301 }
 302
 303
 304 /* ------------------------------------------------------------------------- */
 305 /* tool functions/defines for ad hoc simplification and possible future
 306    cleanup      */
 307 /* ------------------------------------------------------------------------- */
 308
 309 #define UVTOINDEX(u,v) (startvlak + (u) * sizev + (v))
 310 /*
 311
 312 NOTE THAT U/V COORDINATES ARE SOMETIMES SWAPPED !!
 313
 314 ^       ()----p4----p3----()
 315 |       |     |     |     |
 316 u       |     |  F1 |  F2 |
 317         |     |     |     |
 318         ()----p1----p2----()
 319                v ->
 320 */
 321
 322 /* ------------------------------------------------------------------------- */
 323
 324 static void split_v_renderfaces(ObjectRen *obr, int startvlak, int startvert, int usize, int vsize, int uIndex, int cyclu, int cyclv)
 325 {
 326         int vLen = vsize-1+(!!cyclv);
 327         int v;
 328
 329         for (v=0; v<vLen; v++) {
 330                 VlakRen *vlr = RE_findOrAddVlak(obr, startvlak + vLen*uIndex + v);
 331                 VertRen *vert = RE_vertren_copy(obr, vlr->v2);
 332
 333                 if (cyclv) {
 334                         vlr->v2 = vert;
 335
 336                         if (v==vLen-1) {
 337                                 VlakRen *vlr = RE_findOrAddVlak(obr, startvlak + vLen*uIndex + 0);
 338                                 vlr->v1 = vert;
 339                         } else {
 340                                 VlakRen *vlr = RE_findOrAddVlak(obr, startvlak + vLen*uIndex + v+1);
 341                                 vlr->v1 = vert;
 342                         }
 343                 } else {
 344                         vlr->v2 = vert;
 345
 346                         if (v<vLen-1) {
 347                                 VlakRen *vlr = RE_findOrAddVlak(obr, startvlak + vLen*uIndex + v+1);
 348                                 vlr->v1 = vert;
 349                         }
 350
 351                         if (v==0) {
 352                                 vlr->v1 = RE_vertren_copy(obr, vlr->v1);
 353                         }
 354                 }
 355         }
 356 }
 357
 358 /* ------------------------------------------------------------------------- */
 359
 360 static int check_vnormal(float *n, float *veno)
 361 {
 362         float inp;
 363
 364         inp=n[0]*veno[0]+n[1]*veno[1]+n[2]*veno[2];
 365         if(inp < -FLT_EPSILON10) return 1;
 366         return 0;
 367 }
 368
 369 /* ------------------------------------------------------------------------- */
 370 /* Stress, tangents and normals                                              */
 371 /* ------------------------------------------------------------------------- */
 372
 373 static void calc_edge_stress_add(float *accum, VertRen *v1, VertRen *v2)
 374 {
 375         float len= VecLenf(v1->co, v2->co)/VecLenf(v1->orco, v2->orco);
 376         float *acc;
 377
 378         acc= accum + 2*v1->index;
 379         acc[0]+= len;
 380         acc[1]+= 1.0f;
 381
 382         acc= accum + 2*v2->index;
 383         acc[0]+= len;
 384         acc[1]+= 1.0f;
 385 }
 386
 387 static void calc_edge_stress(Render *re, ObjectRen *obr, Mesh *me)
 388 {
 389         float loc[3], size[3], *accum, *acc, *accumoffs, *stress;
 390         int a;
 391
 392         if(obr->totvert==0) return;
 393
 394         mesh_get_texspace(me, loc, NULL, size);
 395
 396         accum= MEM_callocN(2*sizeof(float)*obr->totvert, "temp accum for stress");
 397
 398         /* de-normalize orco */
 399         for(a=0; a<obr->totvert; a++) {
 400                 VertRen *ver= RE_findOrAddVert(obr, a);
 401                 if(ver->orco) {
 402                         ver->orco[0]= ver->orco[0]*size[0] +loc[0];
 403                         ver->orco[1]= ver->orco[1]*size[1] +loc[1];
 404                         ver->orco[2]= ver->orco[2]*size[2] +loc[2];
 405                 }
 406         }
 407
 408         /* add stress values */
 409         accumoffs= accum;       /* so we can use vertex index */
 410         for(a=0; a<obr->totvlak; a++) {
 411                 VlakRen *vlr= RE_findOrAddVlak(obr, a);
 412
 413                 if(vlr->v1->orco && vlr->v4) {
 414                         calc_edge_stress_add(accumoffs, vlr->v1, vlr->v2);
 415                         calc_edge_stress_add(accumoffs, vlr->v2, vlr->v3);
 416                         calc_edge_stress_add(accumoffs, vlr->v3, vlr->v1);
 417                         if(vlr->v4) {
 418                                 calc_edge_stress_add(accumoffs, vlr->v3, vlr->v4);
 419                                 calc_edge_stress_add(accumoffs, vlr->v4, vlr->v1);
 420                                 calc_edge_stress_add(accumoffs, vlr->v2, vlr->v4);
 421                         }
 422                 }
 423         }
 424
 425         for(a=0; a<obr->totvert; a++) {
 426                 VertRen *ver= RE_findOrAddVert(obr, a);
 427                 if(ver->orco) {
 428                         /* find stress value */
 429                         acc= accumoffs + 2*ver->index;
 430                         if(acc[1]!=0.0f)
 431                                 acc[0]/= acc[1];
 432                         stress= RE_vertren_get_stress(obr, ver, 1);
 433                         *stress= *acc;
 434
 435                         /* restore orcos */
 436                         ver->orco[0] = (ver->orco[0]-loc[0])/size[0];
 437                         ver->orco[1] = (ver->orco[1]-loc[1])/size[1];
 438                         ver->orco[2] = (ver->orco[2]-loc[2])/size[2];
 439                 }
 440         }
 441
 442         MEM_freeN(accum);
 443 }
 444
 445 /* gets tangent from tface or orco */
 446 static void calc_tangent_vector(ObjectRen *obr, VertexTangent **vtangents, MemArena *arena, VlakRen *vlr, int do_nmap_tangent, int do_tangent)
 447 {
 448         MTFace *tface= RE_vlakren_get_tface(obr, vlr, obr->actmtface, NULL, 0);
 449         VertRen *v1=vlr->v1, *v2=vlr->v2, *v3=vlr->v3, *v4=vlr->v4;
 450         float tang[3], *tav;
 451         float *uv1, *uv2, *uv3, *uv4;
 452         float uv[4][2];
 453
 454         if(tface) {
 455                 uv1= tface->uv[0];
 456                 uv2= tface->uv[1];
 457                 uv3= tface->uv[2];
 458                 uv4= tface->uv[3];
 459         }
 460         else if(v1->orco) {
 461                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
 462                 spheremap(v1->orco[0], v1->orco[1], v1->orco[2], &uv[0][0], &uv[0][1]);
 463                 spheremap(v2->orco[0], v2->orco[1], v2->orco[2], &uv[1][0], &uv[1][1]);
 464                 spheremap(v3->orco[0], v3->orco[1], v3->orco[2], &uv[2][0], &uv[2][1]);
 465                 if(v4)
 466                         spheremap(v4->orco[0], v4->orco[1], v4->orco[2], &uv[3][0], &uv[3][1]);
 467         }
 468         else return;
 469
 470         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, vlr->n, tang);
 471
 472         if(do_tangent) {
 473                 tav= RE_vertren_get_tangent(obr, v1, 1);
 474                 VECADD(tav, tav, tang);
 475                 tav= RE_vertren_get_tangent(obr, v2, 1);
 476                 VECADD(tav, tav, tang);
 477                 tav= RE_vertren_get_tangent(obr, v3, 1);
 478                 VECADD(tav, tav, tang);
 479         }
 480
 481         if(do_nmap_tangent) {
 482                 sum_or_add_vertex_tangent(arena, &vtangents[v1->index], tang, uv1);
 483                 sum_or_add_vertex_tangent(arena, &vtangents[v2->index], tang, uv2);
 484                 sum_or_add_vertex_tangent(arena, &vtangents[v3->index], tang, uv3);
 485         }
 486
 487         if(v4) {
 488                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, vlr->n, tang);
 489
 490                 if(do_tangent) {
 491                         tav= RE_vertren_get_tangent(obr, v1, 1);
 492                         VECADD(tav, tav, tang);
 493                         tav= RE_vertren_get_tangent(obr, v3, 1);
 494                         VECADD(tav, tav, tang);
 495                         tav= RE_vertren_get_tangent(obr, v4, 1);
 496                         VECADD(tav, tav, tang);
 497                 }
 498
 499                 if(do_nmap_tangent) {
 500                         sum_or_add_vertex_tangent(arena, &vtangents[v1->index], tang, uv1);
 501                         sum_or_add_vertex_tangent(arena, &vtangents[v3->index], tang, uv3);
 502                         sum_or_add_vertex_tangent(arena, &vtangents[v4->index], tang, uv4);
 503                 }
 504         }
 505 }
 506
 507
 508 static void calc_vertexnormals(Render *re, ObjectRen *obr, int do_tangent, int do_nmap_tangent)
 509 {
 510         MemArena *arena= NULL;
 511         VertexTangent **vtangents= NULL;
 512         int a;
 513
 514         if(do_nmap_tangent) {
 515                 arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE);
 516                 BLI_memarena_use_calloc(arena);
 517
 518                 vtangents= MEM_callocN(sizeof(VertexTangent*)*obr->totvert, "VertexTangent");
 519         }
 520
 521                 /* clear all vertex normals */
 522         for(a=0; a<obr->totvert; a++) {
 523                 VertRen *ver= RE_findOrAddVert(obr, a);
 524                 ver->n[0]=ver->n[1]=ver->n[2]= 0.0f;
 525         }
 526
 527                 /* calculate cos of angles and point-masses, use as weight factor to
 528                    add face normal to vertex */
 529         for(a=0; a<obr->totvlak; a++) {
 530                 VlakRen *vlr= RE_findOrAddVlak(obr, a);
 531                 if(vlr->flag & ME_SMOOTH) {
 532                         VertRen *v1= vlr->v1;
 533                         VertRen *v2= vlr->v2;
 534                         VertRen *v3= vlr->v3;
 535                         VertRen *v4= vlr->v4;
 536                         float n1[3], n2[3], n3[3], n4[3];
 537                         float fac1, fac2, fac3, fac4=0.0f;
 538
 539                         if(re->flag & R_GLOB_NOPUNOFLIP)
 540                                 vlr->flag |= R_NOPUNOFLIP;
 541
 542                         VecSubf(n1, v2->co, v1->co);
 543                         Normalize(n1);
 544                         VecSubf(n2, v3->co, v2->co);
 545                         Normalize(n2);
 546                         if(v4==NULL) {
 547                                 VecSubf(n3, v1->co, v3->co);
 548                                 Normalize(n3);
 549
 550                                 fac1= saacos(-n1[0]*n3[0]-n1[1]*n3[1]-n1[2]*n3[2]);
 551                                 fac2= saacos(-n1[0]*n2[0]-n1[1]*n2[1]-n1[2]*n2[2]);
 552                                 fac3= saacos(-n2[0]*n3[0]-n2[1]*n3[1]-n2[2]*n3[2]);
 553                         }
 554                         else {
 555                                 VecSubf(n3, v4->co, v3->co);
 556                                 Normalize(n3);
 557                                 VecSubf(n4, v1->co, v4->co);
 558                                 Normalize(n4);
 559
 560                                 fac1= saacos(-n4[0]*n1[0]-n4[1]*n1[1]-n4[2]*n1[2]);
 561                                 fac2= saacos(-n1[0]*n2[0]-n1[1]*n2[1]-n1[2]*n2[2]);
 562                                 fac3= saacos(-n2[0]*n3[0]-n2[1]*n3[1]-n2[2]*n3[2]);
 563                                 fac4= saacos(-n3[0]*n4[0]-n3[1]*n4[1]-n3[2]*n4[2]);
 564
 565                                 if(!(vlr->flag & R_NOPUNOFLIP)) {
 566                                         if( check_vnormal(vlr->n, v4->n) ) fac4= -fac4;
 567                                 }
 568
 569                                 v4->n[0] +=fac4*vlr->n[0];
 570                                 v4->n[1] +=fac4*vlr->n[1];
 571                                 v4->n[2] +=fac4*vlr->n[2];
 572                         }
 573
 574                         if(!(vlr->flag & R_NOPUNOFLIP)) {
 575                                 if( check_vnormal(vlr->n, v1->n) ) fac1= -fac1;
 576                                 if( check_vnormal(vlr->n, v2->n) ) fac2= -fac2;
 577                                 if( check_vnormal(vlr->n, v3->n) ) fac3= -fac3;
 578                         }
 579
 580                         v1->n[0] +=fac1*vlr->n[0];
 581                         v1->n[1] +=fac1*vlr->n[1];
 582                         v1->n[2] +=fac1*vlr->n[2];
 583
 584                         v2->n[0] +=fac2*vlr->n[0];
 585                         v2->n[1] +=fac2*vlr->n[1];
 586                         v2->n[2] +=fac2*vlr->n[2];
 587
 588                         v3->n[0] +=fac3*vlr->n[0];
 589                         v3->n[1] +=fac3*vlr->n[1];
 590                         v3->n[2] +=fac3*vlr->n[2];
 591
 592                 }
 593                 if(do_nmap_tangent || do_tangent) {
 594                         /* tangents still need to be calculated for flat faces too */
 595                         /* weighting removed, they are not vertexnormals */
 596                         calc_tangent_vector(obr, vtangents, arena, vlr, do_nmap_tangent, do_tangent);
 597                 }
 598         }
 599
 600                 /* do solid faces */
 601         for(a=0; a<obr->totvlak; a++) {
 602                 VlakRen *vlr= RE_findOrAddVlak(obr, a);
 603                 if((vlr->flag & ME_SMOOTH)==0) {
 604                         float *f1= vlr->v1->n;
 605                         if(f1[0]==0.0 && f1[1]==0.0 && f1[2]==0.0) VECCOPY(f1, vlr->n);
 606                         f1= vlr->v2->n;
 607                         if(f1[0]==0.0 && f1[1]==0.0 && f1[2]==0.0) VECCOPY(f1, vlr->n);
 608                         f1= vlr->v3->n;
 609                         if(f1[0]==0.0 && f1[1]==0.0 && f1[2]==0.0) VECCOPY(f1, vlr->n);
 610                         if(vlr->v4) {
 611                                 f1= vlr->v4->n;
 612                                 if(f1[0]==0.0 && f1[1]==0.0 && f1[2]==0.0) VECCOPY(f1, vlr->n);
 613                         }
 614                 }
 615
 616                 if(do_nmap_tangent) {
 617                         VertRen *v1=vlr->v1, *v2=vlr->v2, *v3=vlr->v3, *v4=vlr->v4;
 618                         MTFace *tface= RE_vlakren_get_tface(obr, vlr, obr->actmtface, NULL, 0);
 619
 620                         if(tface) {
 621                                 float *vtang, *ftang= RE_vlakren_get_nmap_tangent(obr, vlr, 1);
 622
 623                                 vtang= find_vertex_tangent(vtangents[v1->index], tface->uv[0]);
 624                                 VECCOPY(ftang, vtang);
 625                                 Normalize(ftang);
 626                                 vtang= find_vertex_tangent(vtangents[v2->index], tface->uv[1]);
 627                                 VECCOPY(ftang+3, vtang);
 628                                 Normalize(ftang+3);
 629                                 vtang= find_vertex_tangent(vtangents[v3->index], tface->uv[2]);
 630                                 VECCOPY(ftang+6, vtang);
 631                                 Normalize(ftang+6);
 632                                 if(v4) {
 633                                         vtang= find_vertex_tangent(vtangents[v4->index], tface->uv[3]);
 634                                         VECCOPY(ftang+9, vtang);
 635                                         Normalize(ftang+9);
 636                                 }
 637                         }
 638                 }
 639         }
 640
 641                 /* normalize vertex normals */
 642         for(a=0; a<obr->totvert; a++) {
 643                 VertRen *ver= RE_findOrAddVert(obr, a);
 644                 Normalize(ver->n);
 645                 if(do_tangent) {
 646                         float *tav= RE_vertren_get_tangent(obr, ver, 0);
 647                         if (tav) {
 648                                 /* orthonorm. */
 649                                 float tdn = tav[0]*ver->n[0] + tav[1]*ver->n[1] + tav[2]*ver->n[2];
 650                                 tav[0] -= ver->n[0]*tdn;
 651                                 tav[1] -= ver->n[1]*tdn;
 652                                 tav[2] -= ver->n[2]*tdn;
 653                                 Normalize(tav);
 654                         }
 655                 }
 656         }
 657
 658
 659         if(arena)
 660                 BLI_memarena_free(arena);
 661         if(vtangents)
 662                 MEM_freeN(vtangents);
 663 }
 664
 665 /* ------------------------------------------------------------------------- */
 666 /* Autosmoothing:                                                            */
 667 /* ------------------------------------------------------------------------- */
 668
 669 typedef struct ASvert {
 670         int totface;
 671         ListBase faces;
 672 } ASvert;
 673
 674 typedef struct ASface {
 675         struct ASface *next, *prev;
 676         VlakRen *vlr[4];
 677         VertRen *nver[4];
 678 } ASface;
 679
 680 static void as_addvert(ASvert *asv, VertRen *v1, VlakRen *vlr)
 681 {
 682         ASface *asf;
 683         int a;
 684
 685         if(v1 == NULL) return;
 686
 687         if(asv->faces.first==NULL) {
 688                 asf= MEM_callocN(sizeof(ASface), "asface");
 689                 BLI_addtail(&asv->faces, asf);
 690         }
 691
 692         asf= asv->faces.last;
 693         for(a=0; a<4; a++) {
 694                 if(asf->vlr[a]==NULL) {
 695                         asf->vlr[a]= vlr;
 696                         asv->totface++;
 697                         break;
 698                 }
 699         }
 700
 701         /* new face struct */
 702         if(a==4) {
 703                 asf= MEM_callocN(sizeof(ASface), "asface");
 704                 BLI_addtail(&asv->faces, asf);
 705                 asf->vlr[0]= vlr;
 706                 asv->totface++;
 707         }
 708 }
 709
 710 static int as_testvertex(VlakRen *vlr, VertRen *ver, ASvert *asv, float thresh)
 711 {
 712         /* return 1: vertex needs a copy */
 713         ASface *asf;
 714         float inp;
 715         int a;
 716
 717         if(vlr==0) return 0;
 718
 719         asf= asv->faces.first;
 720         while(asf) {
 721                 for(a=0; a<4; a++) {
 722                         if(asf->vlr[a] && asf->vlr[a]!=vlr) {
 723                                 inp= fabs( vlr->n[0]*asf->vlr[a]->n[0] + vlr->n[1]*asf->vlr[a]->n[1] + vlr->n[2]*asf->vlr[a]->n[2] );
 724                                 if(inp < thresh) return 1;
 725                         }
 726                 }
 727                 asf= asf->next;
 728         }
 729
 730         return 0;
 731 }
 732
 733 static VertRen *as_findvertex(VlakRen *vlr, VertRen *ver, ASvert *asv, float thresh)
 734 {
 735         /* return when new vertex already was made */
 736         ASface *asf;
 737         float inp;
 738         int a;
 739
 740         asf= asv->faces.first;
 741         while(asf) {
 742                 for(a=0; a<4; a++) {
 743                         if(asf->vlr[a] && asf->vlr[a]!=vlr) {
 744                                 /* this face already made a copy for this vertex! */
 745                                 if(asf->nver[a]) {
 746                                         inp= fabs( vlr->n[0]*asf->vlr[a]->n[0] + vlr->n[1]*asf->vlr[a]->n[1] + vlr->n[2]*asf->vlr[a]->n[2] );
 747                                         if(inp >= thresh) {
 748                                                 return asf->nver[a];
 749                                         }
 750                                 }
 751                         }
 752                 }
 753                 asf= asf->next;
 754         }
 755
 756         return NULL;
 757 }
 758
 759 /* note; autosmooth happens in object space still, after applying autosmooth we rotate */
 760 /* note2; actually, when original mesh and displist are equal sized, face normals are from original mesh */
 761 static void autosmooth(Render *re, ObjectRen *obr, float mat[][4], int degr)
 762 {
 763         ASvert *asv, *asverts;
 764         ASface *asf;
 765         VertRen *ver, *v1;
 766         VlakRen *vlr;
 767         float thresh;
 768         int a, b, totvert;
 769
 770         if(obr->totvert==0) return;
 771         asverts= MEM_callocN(sizeof(ASvert)*obr->totvert, "all smooth verts");
 772
 773         thresh= cos( M_PI*(0.5f+(float)degr)/180.0 );
 774
 775         /* step zero: give faces normals of original mesh, if this is provided */
 776
 777
 778         /* step one: construct listbase of all vertices and pointers to faces */
 779         for(a=0; a<obr->totvlak; a++) {
 780                 vlr= RE_findOrAddVlak(obr, a);
 781                 /* skip wire faces */
 782                 if(vlr->v2 != vlr->v3) {
 783                         as_addvert(asverts+vlr->v1->index, vlr->v1, vlr);
 784                         as_addvert(asverts+vlr->v2->index, vlr->v2, vlr);
 785                         as_addvert(asverts+vlr->v3->index, vlr->v3, vlr);
 786                         if(vlr->v4)
 787                                 as_addvert(asverts+vlr->v4->index, vlr->v4, vlr);
 788                 }
 789         }
 790
 791         totvert= obr->totvert;
 792         /* we now test all vertices, when faces have a normal too much different: they get a new vertex */
 793         for(a=0, asv=asverts; a<totvert; a++, asv++) {
 794                 if(asv && asv->totface>1) {
 795                         ver= RE_findOrAddVert(obr, a);
 796
 797                         asf= asv->faces.first;
 798                         while(asf) {
 799                                 for(b=0; b<4; b++) {
 800
 801                                         /* is there a reason to make a new vertex? */
 802                                         vlr= asf->vlr[b];
 803                                         if( as_testvertex(vlr, ver, asv, thresh) ) {
 804
 805                                                 /* already made a new vertex within threshold? */
 806                                                 v1= as_findvertex(vlr, ver, asv, thresh);
 807                                                 if(v1==NULL) {
 808                                                         /* make a new vertex */
 809                                                         v1= RE_vertren_copy(obr, ver);
 810                                                 }
 811                                                 asf->nver[b]= v1;
 812                                                 if(vlr->v1==ver) vlr->v1= v1;
 813                                                 if(vlr->v2==ver) vlr->v2= v1;
 814                                                 if(vlr->v3==ver) vlr->v3= v1;
 815                                                 if(vlr->v4==ver) vlr->v4= v1;
 816                                         }
 817                                 }
 818                                 asf= asf->next;
 819                         }
 820                 }
 821         }
 822
 823         /* free */
 824         for(a=0; a<totvert; a++) {
 825                 BLI_freelistN(&asverts[a].faces);
 826         }
 827         MEM_freeN(asverts);
 828
 829         /* rotate vertices and calculate normal of faces */
 830         for(a=0; a<obr->totvert; a++) {
 831                 ver= RE_findOrAddVert(obr, a);
 832                 Mat4MulVecfl(mat, ver->co);
 833         }
 834         for(a=0; a<obr->totvlak; a++) {
 835                 vlr= RE_findOrAddVlak(obr, a);
 836
 837                 /* skip wire faces */
 838                 if(vlr->v2 != vlr->v3) {
 839                         if(vlr->v4)
 840                                 CalcNormFloat4(vlr->v4->co, vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
 841                         else
 842                                 CalcNormFloat(vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
 843                 }
 844         }
 845 }
 846
 847 /* ------------------------------------------------------------------------- */
 848 /* Orco hash and Materials                                                   */
 849 /* ------------------------------------------------------------------------- */
 850
 851 static float *get_object_orco(Render *re, Object *ob)
 852 {
 853         float *orco;
 854
 855         if (!re->orco_hash)
 856                 re->orco_hash = BLI_ghash_new(BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp);
 857
 858         orco = BLI_ghash_lookup(re->orco_hash, ob);
 859
 860         if (!orco) {
 861                 if (ELEM(ob->type, OB_CURVE, OB_FONT)) {
 862                         orco = make_orco_curve(re->scene, ob);
 863                 } else if (ob->type==OB_SURF) {
 864                         orco = make_orco_surf(ob);
 865                 } else if (ob->type==OB_MBALL) {
 866                         orco = make_orco_mball(ob);
 867                 }
 868
 869                 if (orco)
 870                         BLI_ghash_insert(re->orco_hash, ob, orco);
 871         }
 872
 873         return orco;
 874 }
 875
 876 static void set_object_orco(Render *re, void *ob, float *orco)
 877 {
 878         if (!re->orco_hash)
 879                 re->orco_hash = BLI_ghash_new(BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp);
 880
 881         BLI_ghash_insert(re->orco_hash, ob, orco);
 882 }
 883
 884 static void free_mesh_orco_hash(Render *re)
 885 {
 886         if (re->orco_hash) {
 887                 BLI_ghash_free(re->orco_hash, NULL, (GHashValFreeFP)MEM_freeN);
 888                 re->orco_hash = NULL;
 889         }
 890 }
 891
 892 static void check_material_mapto(Material *ma)
 893 {
 894         int a;
 895         ma->mapto_textured = 0;
 896
 897         /* cache which inputs are actually textured.
 898          * this can avoid a bit of time spent iterating through all the texture slots, map inputs and map tos
 899          * every time a property which may or may not be textured is accessed */
 900
 901         for(a=0; a<MAX_MTEX; a++) {
 902                 if(ma->mtex[a] && ma->mtex[a]->tex) {
 903                         /* currently used only in volume render, so we'll check for those flags */
 904                         if(ma->mtex[a]->mapto & MAP_DENSITY) ma->mapto_textured |= MAP_DENSITY;
 905                         if(ma->mtex[a]->mapto & MAP_EMISSION) ma->mapto_textured |= MAP_EMISSION;
 906                         if(ma->mtex[a]->mapto & MAP_EMISSION_COL) ma->mapto_textured |= MAP_EMISSION_COL;
 907                         if(ma->mtex[a]->mapto & MAP_SCATTERING) ma->mapto_textured |= MAP_SCATTERING;
 908                         if(ma->mtex[a]->mapto & MAP_TRANSMISSION_COL) ma->mapto_textured |= MAP_TRANSMISSION_COL;
 909                         if(ma->mtex[a]->mapto & MAP_REFLECTION) ma->mapto_textured |= MAP_REFLECTION;
 910                         if(ma->mtex[a]->mapto & MAP_REFLECTION_COL) ma->mapto_textured |= MAP_REFLECTION_COL;
 911                 }
 912         }
 913 }
 914 static void flag_render_node_material(Render *re, bNodeTree *ntree)
 915 {
 916         bNode *node;
 917
 918         for(node=ntree->nodes.first; node; node= node->next) {
 919                 if(node->id) {
 920                         if(GS(node->id->name)==ID_MA) {
 921                                 Material *ma= (Material *)node->id;
 922
 923                                 if((ma->mode & MA_TRANSP) && (ma->mode & MA_ZTRANSP))
 924                                         re->flag |= R_ZTRA;
 925
 926                                 ma->flag |= MA_IS_USED;
 927                         }
 928                         else if(node->type==NODE_GROUP)
 929                                 flag_render_node_material(re, (bNodeTree *)node->id);
 930                 }
 931         }
 932 }
 933
 934 static Material *give_render_material(Render *re, Object *ob, int nr)
 935 {
 936         extern Material defmaterial;    /* material.c */
 937         Material *ma;
 938
 939         ma= give_current_material(ob, nr);
 940         if(ma==NULL)
 941                 ma= &defmaterial;
 942
 943         if(re->r.mode & R_SPEED) ma->texco |= NEED_UV;
 944
 945         if(ma->material_type == MA_TYPE_VOLUME) {
 946                 ma->mode |= MA_TRANSP;
 947                 ma->mode &= ~MA_SHADBUF;
 948         }
 949         if((ma->mode & MA_TRANSP) && (ma->mode & MA_ZTRANSP))
 950                 re->flag |= R_ZTRA;
 951
 952         /* for light groups */
 953         ma->flag |= MA_IS_USED;
 954
 955         if(ma->nodetree && ma->use_nodes)
 956                 flag_render_node_material(re, ma->nodetree);
 957
 958         check_material_mapto(ma);
 959
 960         return ma;
 961 }
 962
 963 /* ------------------------------------------------------------------------- */
 964 /* Particles                                                                 */
 965 /* ------------------------------------------------------------------------- */
 966 typedef struct ParticleStrandData
 967 {
 968         struct MCol *mcol;
 969         float *orco, *uvco, *surfnor;
 970         float time, adapt_angle, adapt_pix, size;
 971         int totuv, totcol;
 972         int first, line, adapt, override_uv;
 973 }
 974 ParticleStrandData;
 975 /* future thread problem... */
 976 static void static_particle_strand(Render *re, ObjectRen *obr, Material *ma, ParticleStrandData *sd, float *vec, float *vec1)
 977 {
 978         static VertRen *v1= NULL, *v2= NULL;
 979         VlakRen *vlr= NULL;
 980         float nor[3], cross[3], crosslen, w, dx, dy, width;
 981         static float anor[3], avec[3];
 982         int flag, i;
 983         static int second=0;
 984
 985         VecSubf(nor, vec, vec1);
 986         Normalize(nor);         // nor needed as tangent
 987         Crossf(cross, vec, nor);
 988
 989         /* turn cross in pixelsize */
 990         w= vec[2]*re->winmat[2][3] + re->winmat[3][3];
 991         dx= re->winx*cross[0]*re->winmat[0][0];
 992         dy= re->winy*cross[1]*re->winmat[1][1];
 993         w= sqrt(dx*dx + dy*dy)/w;
 994
 995         if(w!=0.0f) {
 996                 float fac;
 997                 if(ma->strand_ease!=0.0f) {
 998                         if(ma->strand_ease<0.0f)
 999                                 fac= pow(sd->time, 1.0+ma->strand_ease);
1000                         else
1001                                 fac= pow(sd->time, 1.0/(1.0f-ma->strand_ease));
1002                 }
1003                 else fac= sd->time;
1004
1005                 width= ((1.0f-fac)*ma->strand_sta + (fac)*ma->strand_end);
1006
1007                 /* use actual Blender units for strand width and fall back to minimum width */
1008                 if(ma->mode & MA_STR_B_UNITS){
1009             crosslen= VecLength(cross);
1010             w= 2.0f*crosslen*ma->strand_min/w;
1011
1012                         if(width < w)
1013                                 width= w;
1014
1015                         /*cross is the radius of the strand so we want it to be half of full width */
1016                         VecMulf(cross,0.5/crosslen);
1017                 }
1018                 else
1019                         width/=w;
1020
1021                 VecMulf(cross, width);
1022         }
1023         else width= 1.0f;
1024
1025         if(ma->mode & MA_TANGENT_STR)
1026                 flag= R_SMOOTH|R_NOPUNOFLIP|R_TANGENT;
1027         else
1028                 flag= R_SMOOTH;
1029
1030         /* only 1 pixel wide strands filled in as quads now, otherwise zbuf errors */
1031         if(ma->strand_sta==1.0f)
1032                 flag |= R_STRAND;
1033
1034         /* single face line */
1035         if(sd->line) {
1036                 vlr= RE_findOrAddVlak(obr, obr->totvlak++);
1037                 vlr->flag= flag;
1038                 vlr->v1= RE_findOrAddVert(obr, obr->totvert++);
1039                 vlr->v2= RE_findOrAddVert(obr, obr->totvert++);
1040                 vlr->v3= RE_findOrAddVert(obr, obr->totvert++);
1041                 vlr->v4= RE_findOrAddVert(obr, obr->totvert++);
1042
1043                 VECCOPY(vlr->v1->co, vec);
1044                 VecAddf(vlr->v1->co, vlr->v1->co, cross);
1045                 VECCOPY(vlr->v1->n, nor);
1046                 vlr->v1->orco= sd->orco;
1047                 vlr->v1->accum= -1.0f;  // accum abuse for strand texco
1048
1049                 VECCOPY(vlr->v2->co, vec);
1050                 VecSubf(vlr->v2->co, vlr->v2->co, cross);
1051                 VECCOPY(vlr->v2->n, nor);
1052                 vlr->v2->orco= sd->orco;
1053                 vlr->v2->accum= vlr->v1->accum;
1054
1055                 VECCOPY(vlr->v4->co, vec1);
1056                 VecAddf(vlr->v4->co, vlr->v4->co, cross);
1057                 VECCOPY(vlr->v4->n, nor);
1058                 vlr->v4->orco= sd->orco;
1059                 vlr->v4->accum= 1.0f;   // accum abuse for strand texco
1060
1061                 VECCOPY(vlr->v3->co, vec1);
1062                 VecSubf(vlr->v3->co, vlr->v3->co, cross);
1063                 VECCOPY(vlr->v3->n, nor);
1064                 vlr->v3->orco= sd->orco;
1065                 vlr->v3->accum= vlr->v4->accum;
1066
1067                 CalcNormFloat4(vlr->v4->co, vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
1068
1069                 vlr->mat= ma;
1070                 vlr->ec= ME_V2V3;
1071
1072                 if(sd->surfnor) {
1073                         float *snor= RE_vlakren_get_surfnor(obr, vlr, 1);
1074                         VECCOPY(snor, sd->surfnor);
1075                 }
1076
1077                 if(sd->uvco){
1078                         for(i=0; i<sd->totuv; i++){
1079                                 MTFace *mtf;
1080                                 mtf=RE_vlakren_get_tface(obr,vlr,i,NULL,1);
1081                                 mtf->uv[0][0]=mtf->uv[1][0]=
1082                                 mtf->uv[2][0]=mtf->uv[3][0]=(sd->uvco+2*i)[0];
1083                                 mtf->uv[0][1]=mtf->uv[1][1]=
1084                                 mtf->uv[2][1]=mtf->uv[3][1]=(sd->uvco+2*i)[1];
1085                         }
1086                         if(sd->override_uv>=0){
1087                                 MTFace *mtf;
1088                                 mtf=RE_vlakren_get_tface(obr,vlr,sd->override_uv,NULL,0);
1089
1090                                 mtf->uv[0][0]=mtf->uv[3][0]=0.0f;
1091                                 mtf->uv[1][0]=mtf->uv[2][0]=1.0f;
1092
1093                                 mtf->uv[0][1]=mtf->uv[1][1]=0.0f;
1094                                 mtf->uv[2][1]=mtf->uv[3][1]=1.0f;
1095                         }
1096                 }
1097                 if(sd->mcol){
1098                         for(i=0; i<sd->totcol; i++){
1099                                 MCol *mc;
1100                                 mc=RE_vlakren_get_mcol(obr,vlr,i,NULL,1);
1101                                 mc[0]=mc[1]=mc[2]=mc[3]=sd->mcol[i];
1102                                 mc[0]=mc[1]=mc[2]=mc[3]=sd->mcol[i];
1103                         }
1104                 }
1105         }
1106         /* first two vertices of a strand */
1107         else if(sd->first) {
1108                 if(sd->adapt){
1109                         VECCOPY(anor, nor);
1110                         VECCOPY(avec, vec);
1111                         second=1;
1112                 }
1113
1114                 v1= RE_findOrAddVert(obr, obr->totvert++);
1115                 v2= RE_findOrAddVert(obr, obr->totvert++);
1116
1117                 VECCOPY(v1->co, vec);
1118                 VecAddf(v1->co, v1->co, cross);
1119                 VECCOPY(v1->n, nor);
1120                 v1->orco= sd->orco;
1121                 v1->accum= -1.0f;       // accum abuse for strand texco
1122
1123                 VECCOPY(v2->co, vec);
1124                 VecSubf(v2->co, v2->co, cross);
1125                 VECCOPY(v2->n, nor);
1126                 v2->orco= sd->orco;
1127                 v2->accum= v1->accum;
1128         }
1129         /* more vertices & faces to strand */
1130         else {
1131                 if(sd->adapt==0 || second){
1132                         vlr= RE_findOrAddVlak(obr, obr->totvlak++);
1133                         vlr->flag= flag;
1134                         vlr->v1= v1;
1135                         vlr->v2= v2;
1136                         vlr->v3= RE_findOrAddVert(obr, obr->totvert++);
1137                         vlr->v4= RE_findOrAddVert(obr, obr->totvert++);
1138
1139                         v1= vlr->v4; // cycle
1140                         v2= vlr->v3; // cycle
1141
1142
1143                         if(sd->adapt){
1144                                 second=0;
1145                                 VECCOPY(anor,nor);
1146                                 VECCOPY(avec,vec);
1147                         }
1148
1149                 }
1150                 else if(sd->adapt){
1151                         float dvec[3],pvec[3];
1152                         VecSubf(dvec,avec,vec);
1153                         Projf(pvec,dvec,vec);
1154                         VecSubf(dvec,dvec,pvec);
1155
1156                         w= vec[2]*re->winmat[2][3] + re->winmat[3][3];
1157                         dx= re->winx*dvec[0]*re->winmat[0][0]/w;
1158                         dy= re->winy*dvec[1]*re->winmat[1][1]/w;
1159                         w= sqrt(dx*dx + dy*dy);
1160                         if(Inpf(anor,nor)<sd->adapt_angle && w>sd->adapt_pix){
1161                                 vlr= RE_findOrAddVlak(obr, obr->totvlak++);
1162                                 vlr->flag= flag;
1163                                 vlr->v1= v1;
1164                                 vlr->v2= v2;
1165                                 vlr->v3= RE_findOrAddVert(obr, obr->totvert++);
1166                                 vlr->v4= RE_findOrAddVert(obr, obr->totvert++);
1167
1168                                 v1= vlr->v4; // cycle
1169                                 v2= vlr->v3; // cycle
1170
1171                                 VECCOPY(anor,nor);
1172                                 VECCOPY(avec,vec);
1173                         }
1174                         else{
1175                                 vlr= RE_findOrAddVlak(obr, obr->totvlak-1);
1176                         }
1177                 }
1178
1179                 VECCOPY(vlr->v4->co, vec);
1180                 VecAddf(vlr->v4->co, vlr->v4->co, cross);
1181                 VECCOPY(vlr->v4->n, nor);
1182                 vlr->v4->orco= sd->orco;
1183                 vlr->v4->accum= -1.0f + 2.0f*sd->time;  // accum abuse for strand texco
1184
1185                 VECCOPY(vlr->v3->co, vec);
1186                 VecSubf(vlr->v3->co, vlr->v3->co, cross);
1187                 VECCOPY(vlr->v3->n, nor);
1188                 vlr->v3->orco= sd->orco;
1189                 vlr->v3->accum= vlr->v4->accum;
1190
1191                 CalcNormFloat4(vlr->v4->co, vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
1192
1193                 vlr->mat= ma;
1194                 vlr->ec= ME_V2V3;
1195
1196                 if(sd->surfnor) {
1197                         float *snor= RE_vlakren_get_surfnor(obr, vlr, 1);
1198                         VECCOPY(snor, sd->surfnor);
1199                 }
1200
1201                 if(sd->uvco){
1202                         for(i=0; i<sd->totuv; i++){
1203                                 MTFace *mtf;
1204                                 mtf=RE_vlakren_get_tface(obr,vlr,i,NULL,1);
1205                                 mtf->uv[0][0]=mtf->uv[1][0]=
1206                                 mtf->uv[2][0]=mtf->uv[3][0]=(sd->uvco+2*i)[0];
1207                                 mtf->uv[0][1]=mtf->uv[1][1]=
1208                                 mtf->uv[2][1]=mtf->uv[3][1]=(sd->uvco+2*i)[1];
1209                         }
1210                         if(sd->override_uv>=0){
1211                                 MTFace *mtf;
1212                                 mtf=RE_vlakren_get_tface(obr,vlr,sd->override_uv,NULL,0);
1213
1214                                 mtf->uv[0][0]=mtf->uv[3][0]=0.0f;
1215                                 mtf->uv[1][0]=mtf->uv[2][0]=1.0f;
1216
1217                                 mtf->uv[0][1]=mtf->uv[1][1]=(vlr->v1->accum+1.0f)/2.0f;
1218                                 mtf->uv[2][1]=mtf->uv[3][1]=(vlr->v3->accum+1.0f)/2.0f;
1219                         }
1220                 }
1221                 if(sd->mcol){
1222                         for(i=0; i<sd->totcol; i++){
1223                                 MCol *mc;
1224                                 mc=RE_vlakren_get_mcol(obr,vlr,i,NULL,1);
1225                                 mc[0]=mc[1]=mc[2]=mc[3]=sd->mcol[i];
1226                                 mc[0]=mc[1]=mc[2]=mc[3]=sd->mcol[i];
1227                         }
1228                 }
1229         }
1230 }
1231
1232 static void static_particle_wire(ObjectRen *obr, Material *ma, float *vec, float *vec1, int first, int line)
1233 {
1234         VlakRen *vlr;
1235         static VertRen *v1;
1236
1237         if(line) {
1238                 vlr= RE_findOrAddVlak(obr, obr->totvlak++);
1239                 vlr->v1= RE_findOrAddVert(obr, obr->totvert++);
1240                 vlr->v2= RE_findOrAddVert(obr, obr->totvert++);
1241                 vlr->v3= vlr->v2;
1242                 vlr->v4= NULL;
1243
1244                 VECCOPY(vlr->v1->co, vec);
1245                 VECCOPY(vlr->v2->co, vec1);
1246
1247                 VecSubf(vlr->n, vec, vec1);
1248                 Normalize(vlr->n);
1249                 VECCOPY(vlr->v1->n, vlr->n);
1250                 VECCOPY(vlr->v2->n, vlr->n);
1251
1252                 vlr->mat= ma;
1253                 vlr->ec= ME_V1V2;
1254
1255         }
1256         else if(first) {
1257                 v1= RE_findOrAddVert(obr, obr->totvert++);
1258                 VECCOPY(v1->co, vec);
1259         }
1260         else {
1261                 vlr= RE_findOrAddVlak(obr, obr->totvlak++);
1262                 vlr->v1= v1;
1263                 vlr->v2= RE_findOrAddVert(obr, obr->totvert++);
1264                 vlr->v3= vlr->v2;
1265                 vlr->v4= NULL;
1266
1267                 v1= vlr->v2; // cycle
1268                 VECCOPY(v1->co, vec);
1269
1270                 VecSubf(vlr->n, vec, vec1);
1271                 Normalize(vlr->n);
1272                 VECCOPY(v1->n, vlr->n);
1273
1274                 vlr->mat= ma;
1275                 vlr->ec= ME_V1V2;
1276         }
1277
1278 }
1279
1280 static void particle_curve(Render *re, ObjectRen *obr, DerivedMesh *dm, Material *ma, ParticleStrandData *sd, float *loc, float *loc1,  int seed)
1281 {
1282         HaloRen *har=0;
1283
1284         if(ma->material_type == MA_TYPE_WIRE)
1285                 static_particle_wire(obr, ma, loc, loc1, sd->first, sd->line);
1286         else if(ma->material_type == MA_TYPE_HALO) {
1287                 har= RE_inithalo_particle(re, obr, dm, ma, loc, loc1, sd->orco, sd->uvco, sd->size, 1.0, seed);
1288                 if(har) har->lay= obr->ob->lay;
1289         }
1290         else
1291                 static_particle_strand(re, obr, ma, sd, loc, loc1);
1292 }
1293 static void particle_billboard(Render *re, ObjectRen *obr, Material *ma, ParticleBillboardData *bb)
1294 {
1295         VlakRen *vlr;
1296         MTFace *mtf;
1297         float xvec[3], yvec[3], zvec[3], bb_center[3];
1298         float uvx = 0.0f, uvy = 0.0f, uvdx = 1.0f, uvdy = 1.0f, time = 0.0f;
1299
1300         vlr= RE_findOrAddVlak(obr, obr->totvlak++);
1301         vlr->v1= RE_findOrAddVert(obr, obr->totvert++);
1302         vlr->v2= RE_findOrAddVert(obr, obr->totvert++);
1303         vlr->v3= RE_findOrAddVert(obr, obr->totvert++);
1304         vlr->v4= RE_findOrAddVert(obr, obr->totvert++);
1305
1306         psys_make_billboard(bb, xvec, yvec, zvec, bb_center);
1307
1308         VECADD(vlr->v1->co, bb_center, xvec);
1309         VECADD(vlr->v1->co, vlr->v1->co, yvec);
1310         Mat4MulVecfl(re->viewmat, vlr->v1->co);
1311
1312         VECSUB(vlr->v2->co, bb_center, xvec);
1313         VECADD(vlr->v2->co, vlr->v2->co, yvec);
1314         Mat4MulVecfl(re->viewmat, vlr->v2->co);
1315
1316         VECSUB(vlr->v3->co, bb_center, xvec);
1317         VECSUB(vlr->v3->co, vlr->v3->co, yvec);
1318         Mat4MulVecfl(re->viewmat, vlr->v3->co);
1319
1320         VECADD(vlr->v4->co, bb_center, xvec);
1321         VECSUB(vlr->v4->co, vlr->v4->co, yvec);
1322         Mat4MulVecfl(re->viewmat, vlr->v4->co);
1323
1324         CalcNormFloat4(vlr->v4->co, vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
1325         VECCOPY(vlr->v1->n,vlr->n);
1326         VECCOPY(vlr->v2->n,vlr->n);
1327         VECCOPY(vlr->v3->n,vlr->n);
1328         VECCOPY(vlr->v4->n,vlr->n);
1329
1330         vlr->mat= ma;
1331         vlr->ec= ME_V2V3;
1332
1333         if(bb->uv_split > 1){
1334                 uvdx = uvdy = 1.0f / (float)bb->uv_split;
1335                 if(bb->anim == PART_BB_ANIM_TIME) {
1336                         if(bb->split_offset == PART_BB_OFF_NONE)
1337                                 time = bb->time;
1338                         else if(bb->split_offset == PART_BB_OFF_LINEAR)
1339                                 time = (float)fmod(bb->time + (float)bb->num / (float)(bb->uv_split * bb->uv_split), 1.0f);
1340                         else /* split_offset==PART_BB_OFF_RANDOM */
1341                                 time = (float)fmod(bb->time + bb->random, 1.0f);
1342
1343                 }
1344                 else if(bb->anim == PART_BB_ANIM_ANGLE) {
1345                         if(bb->align == PART_BB_VIEW) {
1346                                 time = (float)fmod((bb->tilt + 1.0f) / 2.0f, 1.0);
1347                         }
1348                         else{
1349                                 float axis1[3] = {0.0f,0.0f,0.0f};
1350                                 float axis2[3] = {0.0f,0.0f,0.0f};
1351                                 axis1[(bb->align + 1) % 3] = 1.0f;
1352                                 axis2[(bb->align + 2) % 3] = 1.0f;
1353                                 if(bb->lock == 0) {
1354                                         zvec[bb->align] = 0.0f;
1355                                         Normalize(zvec);
1356                                 }
1357                                 time = saacos(Inpf(zvec, axis1)) / (float)M_PI;
1358                                 if(Inpf(zvec, axis2) < 0.0f)
1359                                         time = 1.0f - time / 2.0f;
1360                                 else
1361                                         time = time / 2.0f;
1362                         }
1363                         if(bb->split_offset == PART_BB_OFF_LINEAR)
1364                                 time = (float)fmod(bb->time + (float)bb->num / (float)(bb->uv_split * bb->uv_split), 1.0f);
1365                         else if(bb->split_offset == PART_BB_OFF_RANDOM)
1366                                 time = (float)fmod(bb->time + bb->random, 1.0f);
1367                 }
1368                 else{
1369                         if(bb->split_offset == PART_BB_OFF_NONE)
1370                                 time = 0.0f;
1371                         else if(bb->split_offset == PART_BB_OFF_LINEAR)
1372                                 time = (float)fmod((float)bb->num /(float)(bb->uv_split * bb->uv_split) , 1.0f);
1373                         else /* split_offset==PART_BB_OFF_RANDOM */
1374                                 time = bb->random;
1375                 }
1376                 uvx = uvdx * floor((float)(bb->uv_split * bb->uv_split) * (float)fmod((double)time, (double)uvdx));
1377                 uvy = uvdy * floor((1.0f - time) * (float)bb->uv_split);
1378                 if(fmod(time, 1.0f / bb->uv_split) == 0.0f)
1379                         uvy -= uvdy;
1380         }
1381
1382         /* normal UVs */
1383         if(bb->uv[0] >= 0){
1384                 mtf = RE_vlakren_get_tface(obr, vlr, bb->uv[0], NULL, 1);
1385                 mtf->uv[0][0] = 1.0f;
1386                 mtf->uv[0][1] = 1.0f;
1387                 mtf->uv[1][0] = 0.0f;
1388                 mtf->uv[1][1] = 1.0f;
1389                 mtf->uv[2][0] = 0.0f;
1390                 mtf->uv[2][1] = 0.0f;
1391                 mtf->uv[3][0] = 1.0f;
1392                 mtf->uv[3][1] = 0.0f;
1393         }
1394
1395         /* time-index UVs */
1396         if(bb->uv[1] >= 0){
1397                 mtf = RE_vlakren_get_tface(obr, vlr, bb->uv[1], NULL, 1);
1398                 mtf->uv[0][0] = mtf->uv[1][0] = mtf->uv[2][0] = mtf->uv[3][0] = bb->time;
1399                 mtf->uv[0][1] = mtf->uv[1][1] = mtf->uv[2][1] = mtf->uv[3][1] = (float)bb->num/(float)bb->totnum;
1400         }
1401
1402         /* split UVs */
1403         if(bb->uv_split > 1 && bb->uv[2] >= 0){
1404                 mtf = RE_vlakren_get_tface(obr, vlr, bb->uv[2], NULL, 1);
1405                 mtf->uv[0][0] = uvx + uvdx;
1406                 mtf->uv[0][1] = uvy + uvdy;
1407                 mtf->uv[1][0] = uvx;
1408                 mtf->uv[1][1] = uvy + uvdy;
1409                 mtf->uv[2][0] = uvx;
1410                 mtf->uv[2][1] = uvy;
1411                 mtf->uv[3][0] = uvx + uvdx;
1412                 mtf->uv[3][1] = uvy;
1413         }
1414 }
1415 static void particle_normal_ren(short ren_as, ParticleSettings *part, Render *re, ObjectRen *obr, DerivedMesh *dm, Material *ma, ParticleStrandData *sd, ParticleBillboardData *bb, ParticleKey *state, int seed, float hasize)
1416 {
1417         float loc[3], loc0[3], loc1[3], vel[3];
1418
1419         VECCOPY(loc, state->co);
1420
1421         if(ren_as != PART_DRAW_BB)
1422                 Mat4MulVecfl(re->viewmat, loc);
1423
1424         switch(ren_as) {
1425                 case PART_DRAW_LINE:
1426                         sd->line = 1;
1427                         sd->time = 0.0f;
1428                         sd->size = hasize;
1429
1430                         VECCOPY(vel, state->vel);
1431                         Mat4Mul3Vecfl(re->viewmat, vel);
1432                         Normalize(vel);
1433
1434                         if(part->draw & PART_DRAW_VEL_LENGTH)
1435                                 VecMulf(vel, VecLength(state->vel));
1436
1437                         VECADDFAC(loc0, loc, vel, -part->draw_line[0]);
1438                         VECADDFAC(loc1, loc, vel, part->draw_line[1]);
1439
1440                         particle_curve(re, obr, dm, ma, sd, loc0, loc1, seed);
1441
1442                         break;
1443
1444                 case PART_DRAW_BB:
1445
1446                         VECCOPY(bb->vec, loc);
1447                         VECCOPY(bb->vel, state->vel);
1448
1449                         particle_billboard(re, obr, ma, bb);
1450
1451                         break;
1452
1453                 default:
1454                 {
1455                         HaloRen *har=0;
1456
1457                         har = RE_inithalo_particle(re, obr, dm, ma, loc, NULL, sd->orco, sd->uvco, hasize, 0.0, seed);
1458
1459                         if(har) har->lay= obr->ob->lay;
1460
1461                         break;
1462                 }
1463         }
1464 }
1465 static void get_particle_uvco_mcol(short from, DerivedMesh *dm, float *fuv, int num, ParticleStrandData *sd)
1466 {
1467         int i;
1468
1469         /* get uvco */
1470         if(sd->uvco && ELEM(from,PART_FROM_FACE,PART_FROM_VOLUME)) {
1471                 for(i=0; i<sd->totuv; i++) {
1472                         if(num != DMCACHE_NOTFOUND) {
1473                                 MFace *mface = dm->getFaceData(dm, num, CD_MFACE);
1474                                 MTFace *mtface = (MTFace*)CustomData_get_layer_n(&dm->faceData, CD_MTFACE, i);
1475                                 mtface += num;
1476
1477                                 psys_interpolate_uvs(mtface, mface->v4, fuv, sd->uvco + 2 * i);
1478                         }
1479                         else {
1480                                 sd->uvco[2*i] = 0.0f;
1481                                 sd->uvco[2*i + 1] = 0.0f;
1482                         }
1483                 }
1484         }
1485
1486         /* get mcol */
1487         if(sd->mcol && ELEM(from,PART_FROM_FACE,PART_FROM_VOLUME)) {
1488                 for(i=0; i<sd->totcol; i++) {
1489                         if(num != DMCACHE_NOTFOUND) {
1490                                 MFace *mface = dm->getFaceData(dm, num, CD_MFACE);
1491                                 MCol *mc = (MCol*)CustomData_get_layer_n(&dm->faceData, CD_MCOL, i);
1492                                 mc += num * 4;
1493
1494                                 psys_interpolate_mcol(mc, mface->v4, fuv, sd->mcol + i);
1495                         }
1496                         else
1497                                 memset(&sd->mcol[i], 0, sizeof(MCol));
1498                 }
1499         }
1500 }
1501 static int render_new_particle_system(Render *re, ObjectRen *obr, ParticleSystem *psys, int timeoffset)
1502 {
1503         Object *ob= obr->ob;
1504 //      Object *tob=0;
1505         Material *ma=0;
1506         ParticleSystemModifierData *psmd;
1507         ParticleSystem *tpsys=0;
1508         ParticleSettings *part, *tpart=0;
1509         ParticleData *pars, *pa=0,*tpa=0;
1510         ParticleKey *states=0;
1511         ParticleKey state;
1512         ParticleCacheKey *cache=0;
1513         ParticleBillboardData bb;
1514         ParticleSimulationData sim = {re->scene, ob, psys, NULL};
1515         ParticleStrandData sd;
1516         StrandBuffer *strandbuf=0;
1517         StrandVert *svert=0;
1518         StrandBound *sbound= 0;
1519         StrandRen *strand=0;
1520         RNG *rng= 0;
1521         float loc[3],loc1[3],loc0[3],mat[4][4],nmat[3][3],co[3],nor[3],time;
1522         float strandlen=0.0f, curlen=0.0f;
1523         float hasize, pa_size, r_tilt, r_length, cfra=bsystem_time(re->scene, ob, (float)re->scene->r.cfra, 0.0);
1524         float pa_time, pa_birthtime, pa_dietime;
1525         float random, simplify[2];
1526         int i, a, k, max_k=0, totpart, dosimplify = 0, dosurfacecache = 0;
1527         int totchild=0;
1528         int seed, path_nbr=0, orco1=0, num;
1529         int totface, *origindex = 0;
1530         char **uv_name=0;
1531
1532 /* 1. check that everything is ok & updated */
1533         if(psys==NULL)
1534                 return 0;
1535
1536         totchild=psys->totchild;
1537
1538         part=psys->part;
1539         pars=psys->particles;
1540
1541         if(part==NULL || pars==NULL || !psys_check_enabled(ob, psys))
1542                 return 0;
1543
1544         if(part->ren_as==PART_DRAW_OB || part->ren_as==PART_DRAW_GR || part->ren_as==PART_DRAW_NOT)
1545                 return 1;
1546
1547 /* 2. start initialising things */
1548
1549         /* last possibility to bail out! */
1550         sim.psmd = psmd = psys_get_modifier(ob,psys);
1551         if(!(psmd->modifier.mode & eModifierMode_Render))
1552                 return 0;
1553
1554         if(part->phystype==PART_PHYS_KEYED)
1555                 psys_count_keyed_targets(&sim);
1556
1557
1558         if(G.rendering == 0) { /* preview render */
1559                 totchild = (int)((float)totchild * (float)part->disp / 100.0f);
1560         }
1561
1562         psys->flag |= PSYS_DRAWING;
1563
1564         rng= rng_new(psys->seed);
1565
1566         totpart=psys->totpart;
1567
1568         memset(&sd, 0, sizeof(ParticleStrandData));
1569         sd.override_uv = -1;
1570
1571 /* 2.1 setup material stff */
1572         ma= give_render_material(re, ob, part->omat);
1573
1574 #if 0 // XXX old animation system
1575         if(ma->ipo){
1576                 calc_ipo(ma->ipo, cfra);
1577                 execute_ipo((ID *)ma, ma->ipo);
1578         }
1579 #endif // XXX old animation system
1580
1581         hasize = ma->hasize;
1582         seed = ma->seed1;
1583
1584         re->flag |= R_HALO;
1585
1586         RE_set_customdata_names(obr, &psmd->dm->faceData);
1587         sd.totuv = CustomData_number_of_layers(&psmd->dm->faceData, CD_MTFACE);
1588         sd.totcol = CustomData_number_of_layers(&psmd->dm->faceData, CD_MCOL);
1589
1590         if(ma->texco & TEXCO_UV && sd.totuv) {
1591                 sd.uvco = MEM_callocN(sd.totuv * 2 * sizeof(float), "particle_uvs");
1592
1593                 if(ma->strand_uvname[0]) {
1594                         sd.override_uv = CustomData_get_named_layer_index(&psmd->dm->faceData, CD_MTFACE, ma->strand_uvname);
1595                         sd.override_uv -= CustomData_get_layer_index(&psmd->dm->faceData, CD_MTFACE);
1596                 }
1597         }
1598         else
1599                 sd.uvco = NULL;
1600
1601         if(sd.totcol)
1602                 sd.mcol = MEM_callocN(sd.totcol * sizeof(MCol), "particle_mcols");
1603
1604 /* 2.2 setup billboards */
1605         if(part->ren_as == PART_DRAW_BB) {
1606                 int first_uv = CustomData_get_layer_index(&psmd->dm->faceData, CD_MTFACE);
1607
1608                 bb.uv[0] = CustomData_get_named_layer_index(&psmd->dm->faceData, CD_MTFACE, psys->bb_uvname[0]);
1609                 if(bb.uv[0] < 0)
1610                         bb.uv[0] = CustomData_get_active_layer_index(&psmd->dm->faceData, CD_MTFACE);
1611
1612                 bb.uv[1] = CustomData_get_named_layer_index(&psmd->dm->faceData, CD_MTFACE, psys->bb_uvname[1]);
1613
1614                 bb.uv[2] = CustomData_get_named_layer_index(&psmd->dm->faceData, CD_MTFACE, psys->bb_uvname[2]);
1615
1616                 if(first_uv >= 0) {
1617                         bb.uv[0] -= first_uv;
1618                         bb.uv[1] -= first_uv;
1619                         bb.uv[2] -= first_uv;
1620                 }
1621
1622                 bb.align = part->bb_align;
1623                 bb.anim = part->bb_anim;
1624                 bb.lock = part->draw & PART_DRAW_BB_LOCK;
1625                 bb.ob = (part->bb_ob ? part->bb_ob : re->scene->camera);
1626                 bb.offset[0] = part->bb_offset[0];
1627                 bb.offset[1] = part->bb_offset[1];
1628                 bb.split_offset = part->bb_split_offset;
1629                 bb.totnum = totpart+totchild;
1630                 bb.uv_split = part->bb_uv_split;
1631         }
1632
1633 #if 0 // XXX old animation system
1634 /* 2.3 setup time */
1635         if(part->flag&PART_ABS_TIME && part->ipo) {
1636                 calc_ipo(part->ipo, cfra);
1637                 execute_ipo((ID *)part, part->ipo);
1638         }
1639
1640         if(part->flag & PART_GLOB_TIME)
1641 #endif // XXX old animation system
1642         cfra = bsystem_time(re->scene, 0, (float)re->scene->r.cfra, 0.0);
1643
1644 ///* 2.4 setup reactors */
1645 //      if(part->type == PART_REACTOR){
1646 //              psys_get_reactor_target(ob, psys, &tob, &tpsys);
1647 //              if(tpsys && (part->from==PART_FROM_PARTICLE || part->phystype==PART_PHYS_NO)){
1648 //                      psmd = psys_get_modifier(tob,tpsys);
1649 //                      tpart = tpsys->part;
1650 //              }
1651 //      }
1652
1653 /* 2.5 setup matrices */
1654         Mat4MulMat4(mat, ob->obmat, re->viewmat);
1655         Mat4Invert(ob->imat, mat);      /* need to be that way, for imat texture */
1656         Mat3CpyMat4(nmat, ob->imat);
1657         Mat3Transp(nmat);
1658
1659 /* 2.6 setup strand rendering */
1660         if(part->ren_as == PART_DRAW_PATH && psys->pathcache){
1661                 path_nbr=(int)pow(2.0,(double) part->ren_step);
1662
1663                 if(path_nbr) {
1664                         if(!ELEM(ma->material_type, MA_TYPE_HALO, MA_TYPE_WIRE)) {
1665                                 sd.orco = MEM_mallocN(3*sizeof(float)*(totpart+totchild), "particle orcos");
1666                                 set_object_orco(re, psys, sd.orco);
1667                         }
1668                 }
1669
1670                 if(part->draw & PART_DRAW_REN_ADAPT) {
1671                         sd.adapt = 1;
1672                         sd.adapt_pix = (float)part->adapt_pix;
1673                         sd.adapt_angle = cos((float)part->adapt_angle * (float)(M_PI / 180.0));
1674                 }
1675
1676                 if(re->r.renderer==R_INTERN && part->draw&PART_DRAW_REN_STRAND) {
1677                         strandbuf= RE_addStrandBuffer(obr, (totpart+totchild)*(path_nbr+1));
1678                         strandbuf->ma= ma;
1679                         strandbuf->lay= ob->lay;
1680                         Mat4CpyMat4(strandbuf->winmat, re->winmat);
1681                         strandbuf->winx= re->winx;
1682                         strandbuf->winy= re->winy;
1683                         strandbuf->maxdepth= 2;
1684                         strandbuf->adaptcos= cos((float)part->adapt_angle*(float)(M_PI/180.0));
1685                         strandbuf->overrideuv= sd.override_uv;
1686                         strandbuf->minwidth= ma->strand_min;
1687
1688                         if(ma->strand_widthfade == 0.0f)
1689                                 strandbuf->widthfade= 0.0f;
1690                         else if(ma->strand_widthfade >= 1.0f)
1691                                 strandbuf->widthfade= 2.0f - ma->strand_widthfade;
1692                         else
1693                                 strandbuf->widthfade= 1.0f/MAX2(ma->strand_widthfade, 1e-5f);
1694
1695                         if(part->flag & PART_HAIR_BSPLINE)
1696                                 strandbuf->flag |= R_STRAND_BSPLINE;
1697                         if(ma->mode & MA_STR_B_UNITS)
1698                                 strandbuf->flag |= R_STRAND_B_UNITS;
1699
1700                         svert= strandbuf->vert;
1701
1702                         if(re->r.mode & R_SPEED)
1703                                 dosurfacecache= 1;
1704                         else if((re->wrld.mode & WO_AMB_OCC) && (re->wrld.ao_gather_method == WO_AOGATHER_APPROX))
1705                                 if(ma->amb != 0.0f)
1706                                         dosurfacecache= 1;
1707
1708                         totface= psmd->dm->getNumFaces(psmd->dm);
1709                         origindex= psmd->dm->getFaceDataArray(psmd->dm, CD_ORIGINDEX);
1710                         if(origindex) {
1711                                 for(a=0; a<totface; a++)
1712                                         strandbuf->totbound= MAX2(strandbuf->totbound, origindex[a]);
1713                                 strandbuf->totbound++;
1714                         }
1715                         strandbuf->totbound++;
1716                         strandbuf->bound= MEM_callocN(sizeof(StrandBound)*strandbuf->totbound, "StrandBound");
1717                         sbound= strandbuf->bound;
1718                         sbound->start= sbound->end= 0;
1719                 }
1720         }
1721
1722         if(sd.orco == 0) {
1723                 sd.orco = MEM_mallocN(3 * sizeof(float), "particle orco");
1724                 orco1 = 1;
1725         }
1726
1727         if(path_nbr == 0)
1728                 psys->lattice = psys_get_lattice(&sim);
1729
1730 /* 3. start creating renderable things */
1731         for(a=0,pa=pars; a<totpart+totchild; a++, pa++, seed++) {
1732                 random = rng_getFloat(rng);
1733                 /* setup per particle individual stuff */
1734                 if(a<totpart){
1735                         if(pa->flag & PARS_UNEXIST) continue;
1736
1737                         pa_time=(cfra-pa->time)/pa->lifetime;
1738                         pa_birthtime = pa->time;
1739                         pa_dietime = pa->dietime;
1740 #if 0 // XXX old animation system
1741                         if((part->flag&PART_ABS_TIME) == 0){
1742                                 if(ma->ipo) {
1743                                         /* correction for lifetime */
1744                                         calc_ipo(ma->ipo, 100.0f * pa_time);
1745                                         execute_ipo((ID *)ma, ma->ipo);
1746                                 }
1747                                 if(part->ipo){
1748                                         /* correction for lifetime */
1749                                         calc_ipo(part->ipo, 100.0f*pa_time);
1750                                         execute_ipo((ID *)part, part->ipo);
1751                                 }
1752                         }
1753 #endif // XXX old animation system
1754
1755                         hasize = ma->hasize;
1756
1757                         /* get orco */
1758                         if(tpsys && (part->from==PART_FROM_PARTICLE || part->phystype==PART_PHYS_NO)){
1759                                 tpa=tpsys->particles+pa->num;
1760                                 psys_particle_on_emitter(psmd,tpart->from,tpa->num,pa->num_dmcache,tpa->fuv,tpa->foffset,co,nor,0,0,sd.orco,0);
1761                         }
1762                         else
1763                                 psys_particle_on_emitter(psmd,part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co,nor,0,0,sd.orco,0);
1764
1765                         /* get uvco & mcol */
1766                         num= pa->num_dmcache;
1767
1768                         if(num == DMCACHE_NOTFOUND)
1769                                 if(pa->num < psmd->dm->getNumFaces(psmd->dm))
1770                                         num= pa->num;
1771
1772                         get_particle_uvco_mcol(part->from, psmd->dm, pa->fuv, num, &sd);
1773
1774                         pa_size = pa->size;
1775
1776                         BLI_srandom(psys->seed+a);
1777
1778                         r_tilt = 2.0f*(BLI_frand() - 0.5f);
1779                         r_length = BLI_frand();
1780
1781                         if(path_nbr) {
1782                                 cache = psys->pathcache[a];
1783                                 max_k = (int)cache->steps;
1784                         }
1785
1786                         if(totchild && (part->draw&PART_DRAW_PARENT)==0) continue;
1787                 }
1788                 else {
1789                         ChildParticle *cpa= psys->child+a-totpart;
1790
1791                         if(path_nbr) {
1792                                 cache = psys->childcache[a-totpart];
1793
1794                                 if(cache->steps < 0)
1795                                         continue;
1796
1797                                 max_k = (int)cache->steps;
1798                         }
1799
1800                         pa_time = psys_get_child_time(psys, cpa, cfra, &pa_birthtime, &pa_dietime);
1801
1802 #if 0 // XXX old animation system
1803                         if((part->flag & PART_ABS_TIME) == 0) {
1804                                 if(ma->ipo){
1805                                         /* correction for lifetime */
1806                                         calc_ipo(ma->ipo, 100.0f * pa_time);
1807                                         execute_ipo((ID *)ma, ma->ipo);
1808                                 }
1809                                 if(part->ipo) {
1810                                         /* correction for lifetime */
1811                                         calc_ipo(part->ipo, 100.0f * pa_time);
1812                                         execute_ipo((ID *)part, part->ipo);
1813                                 }
1814                         }
1815 #endif // XXX old animation system
1816
1817                         pa_size = psys_get_child_size(psys, cpa, cfra, &pa_time);
1818
1819                         r_tilt = 2.0f*(PSYS_FRAND(a + 21) - 0.5f);
1820                         r_length = PSYS_FRAND(a + 22);
1821
1822                         num = cpa->num;
1823
1824                         /* get orco */
1825                         if(part->childtype == PART_CHILD_FACES) {
1826                                 psys_particle_on_emitter(psmd,
1827                                         PART_FROM_FACE, cpa->num,DMCACHE_ISCHILD,
1828                                         cpa->fuv,cpa->foffset,co,nor,0,0,sd.orco,0);
1829                         }
1830                         else {
1831                                 ParticleData *par = psys->particles + cpa->parent;
1832                                 psys_particle_on_emitter(psmd, part->from,
1833                                         par->num,DMCACHE_ISCHILD,par->fuv,
1834                                         par->foffset,co,nor,0,0,sd.orco,0);
1835                         }
1836
1837                         /* get uvco & mcol */
1838                         if(part->from!=PART_FROM_PARTICLE && part->childtype==PART_CHILD_FACES) {
1839                                 get_particle_uvco_mcol(PART_FROM_FACE, psmd->dm, cpa->fuv, cpa->num, &sd);
1840                         }
1841                         else {
1842                                 ParticleData *parent = psys->particles + cpa->parent;
1843                                 num = parent->num_dmcache;
1844
1845                                 if(num == DMCACHE_NOTFOUND)
1846                                         if(parent->num < psmd->dm->getNumFaces(psmd->dm))
1847                                                 num = parent->num;
1848
1849                                 get_particle_uvco_mcol(part->from, psmd->dm, parent->fuv, num, &sd);
1850                         }
1851
1852                         dosimplify = psys_render_simplify_params(psys, cpa, simplify);
1853
1854                         if(strandbuf) {
1855                                 if(origindex[cpa->num]+1 > sbound - strandbuf->bound) {
1856                                         sbound= strandbuf->bound + origindex[cpa->num]+1;
1857                                         sbound->start= sbound->end= obr->totstrand;
1858                                 }
1859                         }
1860                 }
1861
1862                 /* surface normal shading setup */
1863                 if(ma->mode_l & MA_STR_SURFDIFF) {
1864                         Mat3MulVecfl(nmat, nor);
1865                         sd.surfnor= nor;
1866                 }
1867                 else
1868                         sd.surfnor= NULL;
1869
1870                 /* strand render setup */
1871                 if(strandbuf) {
1872                         strand= RE_findOrAddStrand(obr, obr->totstrand++);
1873                         strand->buffer= strandbuf;
1874                         strand->vert= svert;
1875                         VECCOPY(strand->orco, sd.orco);
1876
1877                         if(dosimplify) {
1878                                 float *ssimplify= RE_strandren_get_simplify(obr, strand, 1);
1879                                 ssimplify[0]= simplify[0];
1880                                 ssimplify[1]= simplify[1];
1881                         }
1882
1883                         if(sd.surfnor) {
1884                                 float *snor= RE_strandren_get_surfnor(obr, strand, 1);
1885                                 VECCOPY(snor, sd.surfnor);
1886                         }
1887
1888                         if(dosurfacecache && num >= 0) {
1889                                 int *facenum= RE_strandren_get_face(obr, strand, 1);
1890                                 *facenum= num;
1891                         }
1892
1893                         if(sd.uvco) {
1894                                 for(i=0; i<sd.totuv; i++) {
1895                                         if(i != sd.override_uv) {
1896                                                 float *uv= RE_strandren_get_uv(obr, strand, i, NULL, 1);
1897
1898                                                 uv[0]= sd.uvco[2*i];
1899                                                 uv[1]= sd.uvco[2*i+1];
1900                                         }
1901                                 }
1902                         }
1903                         if(sd.mcol) {
1904                                 for(i=0; i<sd.totcol; i++) {
1905                                         MCol *mc= RE_strandren_get_mcol(obr, strand, i, NULL, 1);
1906                                         *mc = sd.mcol[i];
1907                                 }
1908                         }
1909
1910                         sbound->end++;
1911                 }
1912
1913                 /* strandco computation setup */
1914                 if(path_nbr) {
1915                         strandlen= 0.0f;
1916                         curlen= 0.0f;
1917                         for(k=1; k<=path_nbr; k++)
1918                                 if(k<=max_k)
1919                                         strandlen += VecLenf((cache+k-1)->co, (cache+k)->co);
1920                 }
1921
1922                 if(path_nbr) {
1923                         /* render strands */
1924                         for(k=0; k<=path_nbr; k++){
1925                                 if(k<=max_k){
1926                                         VECCOPY(state.co,(cache+k)->co);
1927                                         VECCOPY(state.vel,(cache+k)->vel);
1928                                 }
1929                                 else
1930                                         continue;
1931
1932                                 if(k > 0)
1933                                         curlen += VecLenf((cache+k-1)->co, (cache+k)->co);
1934                                 time= curlen/strandlen;
1935
1936                                 VECCOPY(loc,state.co);
1937                                 Mat4MulVecfl(re->viewmat,loc);
1938
1939                                 if(strandbuf) {
1940                                         VECCOPY(svert->co, loc);
1941                                         svert->strandco= -1.0f + 2.0f*time;
1942                                         svert++;
1943                                         strand->totvert++;
1944                                 }
1945                                 else{
1946                                         sd.size = hasize;
1947
1948                                         if(k==1){
1949                                                 sd.first = 1;
1950                                                 sd.time = 0.0f;
1951                                                 VECSUB(loc0,loc1,loc);
1952                                                 VECADD(loc0,loc1,loc0);
1953
1954                                                 particle_curve(re, obr, psmd->dm, ma, &sd, loc1, loc0, seed);
1955                                         }
1956
1957                                         sd.first = 0;
1958                                         sd.time = time;
1959
1960                                         if(k)
1961                                                 particle_curve(re, obr, psmd->dm, ma, &sd, loc, loc1, seed);
1962
1963                                         VECCOPY(loc1,loc);
1964                                 }
1965                         }
1966
1967                 }
1968                 else {
1969                         /* render normal particles */
1970                         if(part->trail_count > 1) {
1971                                 float length = part->path_end * (1.0 - part->randlength * r_length);
1972                                 int trail_count = part->trail_count * (1.0 - part->randlength * r_length);
1973                                 float ct = (part->draw & PART_ABS_PATH_TIME) ? cfra : pa_time;
1974                                 float dt = length / (trail_count ? (float)trail_count : 1.0f);
1975
1976                                 for(i=0; i < trail_count; i++, ct -= dt) {
1977                                         if(part->draw & PART_ABS_PATH_TIME) {
1978                                                 if(ct < pa_birthtime || ct > pa_dietime)
1979                                                         continue;
1980                                         }
1981                                         else if(ct < 0.0f || ct > 1.0f)
1982                                                 continue;
1983
1984                                         state.time = (part->draw & PART_ABS_PATH_TIME) ? -ct : ct;
1985                                         psys_get_particle_on_path(&sim,a,&state,1);
1986
1987                                         if(psys->parent)
1988                                                 Mat4MulVecfl(psys->parent->obmat, state.co);
1989
1990                                         if(part->ren_as == PART_DRAW_BB) {
1991                                                 bb.random = random;
1992                                                 bb.size = pa_size;
1993                                                 bb.tilt = part->bb_tilt * (1.0f - part->bb_rand_tilt * r_tilt);
1994                                                 bb.time = ct;
1995                                                 bb.num = a;
1996                                         }
1997
1998                                         particle_normal_ren(part->ren_as, part, re, obr, psmd->dm, ma, &sd, &bb, &state, seed, hasize);
1999                                 }
2000                         }
2001                         else {
2002                                 time=0.0f;
2003                                 state.time=cfra;
2004                                 if(psys_get_particle_state(&sim,a,&state,0)==0)
2005                                         continue;
2006
2007                                 if(psys->parent)
2008                                         Mat4MulVecfl(psys->parent->obmat, state.co);
2009
2010                                 if(part->ren_as == PART_DRAW_BB) {
2011                                         bb.random = random;
2012                                         bb.size = pa_size;
2013                                         bb.tilt = part->bb_tilt * (1.0f - part->bb_rand_tilt * r_tilt);
2014                                         bb.time = pa_time;
2015                                         bb.num = a;
2016                                 }
2017
2018                                 particle_normal_ren(part->ren_as, part, re, obr, psmd->dm, ma, &sd, &bb, &state, seed, hasize);
2019                         }
2020                 }
2021
2022                 if(orco1==0)
2023                         sd.orco+=3;
2024
2025                 if(re->test_break(re->tbh))
2026                         break;
2027         }
2028
2029         if(dosurfacecache)
2030                 strandbuf->surface= cache_strand_surface(re, obr, psmd->dm, mat, timeoffset);
2031
2032 /* 4. clean up */
2033 #if 0 // XXX old animation system
2034         if(ma) do_mat_ipo(re->scene, ma);
2035 #endif // XXX old animation system
2036
2037         if(orco1)
2038                 MEM_freeN(sd.orco);
2039
2040         if(sd.uvco)
2041                 MEM_freeN(sd.uvco);
2042
2043         if(sd.mcol)
2044                 MEM_freeN(sd.mcol);
2045
2046         if(uv_name)
2047                 MEM_freeN(uv_name);
2048
2049         if(states)
2050                 MEM_freeN(states);
2051
2052         rng_free(rng);
2053
2054         psys->flag &= ~PSYS_DRAWING;
2055
2056         if(psys->lattice){
2057                 end_latt_deform(psys->lattice);
2058                 psys->lattice= NULL;
2059         }
2060
2061         if(path_nbr && (ma->mode_l & MA_TANGENT_STR)==0)
2062                 calc_vertexnormals(re, obr, 0, 0);
2063
2064         return 1;
2065 }
2066
2067 /* ------------------------------------------------------------------------- */
2068 /* Halo's                                                                                                                                */
2069 /* ------------------------------------------------------------------------- */
2070
2071 static void make_render_halos(Render *re, ObjectRen *obr, Mesh *me, int totvert, MVert *mvert, Material *ma, float *orco)
2072 {
2073         Object *ob= obr->ob;
2074         HaloRen *har;
2075         float xn, yn, zn, nor[3], view[3];
2076         float vec[3], hasize, mat[4][4], imat[3][3];
2077         int a, ok, seed= ma->seed1;
2078
2079         Mat4MulMat4(mat, ob->obmat, re->viewmat);
2080         Mat3CpyMat4(imat, ob->imat);
2081
2082         re->flag |= R_HALO;
2083
2084         for(a=0; a<totvert; a++, mvert++) {
2085                 ok= 1;
2086
2087                 if(ok) {
2088                         hasize= ma->hasize;
2089
2090                         VECCOPY(vec, mvert->co);
2091                         Mat4MulVecfl(mat, vec);
2092
2093                         if(ma->mode & MA_HALOPUNO) {
2094                                 xn= mvert->no[0];
2095                                 yn= mvert->no[1];
2096                                 zn= mvert->no[2];
2097
2098                                 /* transpose ! */
2099                                 nor[0]= imat[0][0]*xn+imat[0][1]*yn+imat[0][2]*zn;
2100                                 nor[1]= imat[1][0]*xn+imat[1][1]*yn+imat[1][2]*zn;
2101                                 nor[2]= imat[2][0]*xn+imat[2][1]*yn+imat[2][2]*zn;
2102                                 Normalize(nor);
2103
2104                                 VECCOPY(view, vec);
2105                                 Normalize(view);
2106
2107                                 zn= nor[0]*view[0]+nor[1]*view[1]+nor[2]*view[2];
2108                                 if(zn>=0.0) hasize= 0.0;
2109                                 else hasize*= zn*zn*zn*zn;
2110                         }
2111
2112                         if(orco) har= RE_inithalo(re, obr, ma, vec, NULL, orco, hasize, 0.0, seed);
2113                         else har= RE_inithalo(re, obr, ma, vec, NULL, mvert->co, hasize, 0.0, seed);
2114                         if(har) har->lay= ob->lay;
2115                 }
2116                 if(orco) orco+= 3;
2117                 seed++;
2118         }
2119 }
2120
2121 static int verghalo(const void *a1, const void *a2)
2122 {
2123         const HaloRen *har1= *(const HaloRen**)a1;
2124         const HaloRen *har2= *(const HaloRen**)a2;
2125
2126         if(har1->zs < har2->zs) return 1;
2127         else if(har1->zs > har2->zs) return -1;
2128         return 0;
2129 }
2130
2131 static void sort_halos(Render *re, int totsort)
2132 {
2133         ObjectRen *obr;
2134         HaloRen *har= NULL, **haso;
2135         int a;
2136
2137         if(re->tothalo==0) return;
2138
2139         re->sortedhalos= MEM_callocN(sizeof(HaloRen*)*re->tothalo, "sorthalos");
2140         haso= re->sortedhalos;
2141
2142         for(obr=re->objecttable.first; obr; obr=obr->next) {
2143                 for(a=0; a<obr->tothalo; a++) {
2144                         if((a & 255)==0) har= obr->bloha[a>>8];
2145                         else har++;
2146
2147                         *(haso++)= har;
2148                 }
2149         }
2150
2151         qsort(re->sortedhalos, totsort, sizeof(HaloRen*), verghalo);
2152 }
2153
2154 /* ------------------------------------------------------------------------- */
2155 /* Displacement Mapping                                                                                                          */
2156 /* ------------------------------------------------------------------------- */
2157
2158 static short test_for_displace(Render *re, Object *ob)
2159 {
2160         /* return 1 when this object uses displacement textures. */
2161         Material *ma;
2162         int i;
2163
2164         for (i=1; i<=ob->totcol; i++) {
2165                 ma=give_render_material(re, ob, i);
2166                 /* ma->mapto is ORed total of all mapto channels */
2167                 if(ma && (ma->mapto & MAP_DISPLACE)) return 1;
2168         }
2169         return 0;
2170 }
2171
2172 static void displace_render_vert(Render *re, ObjectRen *obr, ShadeInput *shi, VertRen *vr, int vindex, float *scale, float mat[][4], float imat[][3])
2173 {
2174         MTFace *tface;
2175         short texco= shi->mat->texco;
2176         float sample=0, displace[3];
2177         char *name;
2178         int i;
2179
2180         /* shi->co is current render coord, just make sure at least some vector is here */
2181         VECCOPY(shi->co, vr->co);
2182         /* vertex normal is used for textures type 'col' and 'var' */
2183         VECCOPY(shi->vn, vr->n);
2184
2185         if(mat)
2186                 Mat4MulVecfl(mat, shi->co);
2187
2188         if(imat) {
2189                 shi->vn[0]= imat[0][0]*vr->n[0]+imat[0][1]*vr->n[1]+imat[0][2]*vr->n[2];
2190                 shi->vn[1]= imat[1][0]*vr->n[0]+imat[1][1]*vr->n[1]+imat[1][2]*vr->n[2];
2191                 shi->vn[2]= imat[2][0]*vr->n[0]+imat[2][1]*vr->n[1]+imat[2][2]*vr->n[2];
2192         }
2193
2194         if (texco & TEXCO_UV) {
2195                 shi->totuv= 0;
2196                 shi->actuv= obr->actmtface;
2197
2198                 for (i=0; (tface=RE_vlakren_get_tface(obr, shi->vlr, i, &name, 0)); i++) {
2199                         ShadeInputUV *suv= &shi->uv[i];
2200
2201                         /* shi.uv needs scale correction from tface uv */
2202                         suv->uv[0]= 2*tface->uv[vindex][0]-1.0f;
2203                         suv->uv[1]= 2*tface->uv[vindex][1]-1.0f;
2204                         suv->uv[2]= 0.0f;
2205                         suv->name= name;
2206                         shi->totuv++;
2207                 }
2208         }
2209
2210         /* set all rendercoords, 'texco' is an ORed value for all textures needed */
2211         if ((texco & TEXCO_ORCO) && (vr->orco)) {
2212                 VECCOPY(shi->lo, vr->orco);
2213         }
2214         if (texco & TEXCO_STICKY) {
2215                 float *sticky= RE_vertren_get_sticky(obr, vr, 0);
2216                 if(sticky) {
2217                         shi->sticky[0]= sticky[0];
2218                         shi->sticky[1]= sticky[1];
2219                         shi->sticky[2]= 0.0f;
2220                 }
2221         }
2222         if (texco & TEXCO_GLOB) {
2223                 VECCOPY(shi->gl, shi->co);
2224                 Mat4MulVecfl(re->viewinv, shi->gl);
2225         }
2226         if (texco & TEXCO_NORM) {
2227                 VECCOPY(shi->orn, shi->vn);
2228         }
2229         if(texco & TEXCO_REFL) {
2230                 /* not (yet?) */
2231         }
2232
2233         shi->displace[0]= shi->displace[1]= shi->displace[2]= 0.0;
2234
2235         do_material_tex(shi);
2236
2237         //printf("no=%f, %f, %f\nbefore co=%f, %f, %f\n", vr->n[0], vr->n[1], vr->n[2],
2238         //vr->co[0], vr->co[1], vr->co[2]);
2239
2240         displace[0]= shi->displace[0] * scale[0];
2241         displace[1]= shi->displace[1] * scale[1];
2242         displace[2]= shi->displace[2] * scale[2];
2243
2244         if(mat)
2245                 Mat3MulVecfl(imat, displace);
2246
2247         /* 0.5 could become button once?  */
2248         vr->co[0] += displace[0];
2249         vr->co[1] += displace[1];
2250         vr->co[2] += displace[2];
2251
2252         //printf("after co=%f, %f, %f\n", vr->co[0], vr->co[1], vr->co[2]);
2253
2254         /* we just don't do this vertex again, bad luck for other face using same vertex with
2255                 different material... */
2256         vr->flag |= 1;
2257
2258         /* Pass sample back so displace_face can decide which way to split the quad */
2259         sample  = shi->displace[0]*shi->displace[0];
2260         sample += shi->displace[1]*shi->displace[1];
2261         sample += shi->displace[2]*shi->displace[2];
2262
2263         vr->accum=sample;
2264         /* Should be sqrt(sample), but I'm only looking for "bigger".  Save the cycles. */
2265         return;
2266 }
2267
2268 static void displace_render_face(Render *re, ObjectRen *obr, VlakRen *vlr, float *scale, float mat[][4], float imat[][3])
2269 {
2270         ShadeInput shi;
2271
2272         /* Warning, This is not that nice, and possibly a bit slow,
2273         however some variables were not initialized properly in, unless using shade_input_initialize(...), we need to do a memset */
2274         memset(&shi, 0, sizeof(ShadeInput));
2275         /* end warning! - Campbell */
2276
2277         /* set up shadeinput struct for multitex() */
2278
2279         /* memset above means we dont need this */
2280         /*shi.osatex= 0;*/              /* signal not to use dx[] and dy[] texture AA vectors */
2281
2282         shi.obr= obr;
2283         shi.vlr= vlr;           /* current render face */
2284         shi.mat= vlr->mat;              /* current input material */
2285         shi.thread= 0;
2286
2287         /* Displace the verts, flag is set when done */
2288         if (!vlr->v1->flag)
2289                 displace_render_vert(re, obr, &shi, vlr->v1,0,  scale, mat, imat);
2290
2291         if (!vlr->v2->flag)
2292                 displace_render_vert(re, obr, &shi, vlr->v2, 1, scale, mat, imat);
2293
2294         if (!vlr->v3->flag)
2295                 displace_render_vert(re, obr, &shi, vlr->v3, 2, scale, mat, imat);
2296
2297         if (vlr->v4) {
2298                 if (!vlr->v4->flag)
2299                         displace_render_vert(re, obr, &shi, vlr->v4, 3, scale, mat, imat);
2300
2301                 /*      closest in displace value.  This will help smooth edges.   */
2302                 if ( fabs(vlr->v1->accum - vlr->v3->accum) > fabs(vlr->v2->accum - vlr->v4->accum))
2303                         vlr->flag |= R_DIVIDE_24;
2304                 else vlr->flag &= ~R_DIVIDE_24;
2305         }
2306
2307         /* Recalculate the face normal  - if flipped before, flip now */
2308         if(vlr->v4) {
2309                 CalcNormFloat4(vlr->v4->co, vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
2310         }
2311         else {
2312                 CalcNormFloat(vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
2313         }
2314 }
2315
2316 static void do_displacement(Render *re, ObjectRen *obr, float mat[][4], float imat[][3])
2317 {
2318         VertRen *vr;
2319         VlakRen *vlr;
2320 //      float min[3]={1e30, 1e30, 1e30}, max[3]={-1e30, -1e30, -1e30};
2321         float scale[3]={1.0f, 1.0f, 1.0f}, temp[3];//, xn
2322         int i; //, texflag=0;
2323         Object *obt;
2324
2325         /* Object Size with parenting */
2326         obt=obr->ob;
2327         while(obt){
2328                 VecAddf(temp, obt->size, obt->dsize);
2329                 scale[0]*=temp[0]; scale[1]*=temp[1]; scale[2]*=temp[2];
2330                 obt=obt->parent;
2331         }
2332
2333         /* Clear all flags */
2334         for(i=0; i<obr->totvert; i++){
2335                 vr= RE_findOrAddVert(obr, i);
2336                 vr->flag= 0;
2337         }
2338
2339         for(i=0; i<obr->totvlak; i++){
2340                 vlr=RE_findOrAddVlak(obr, i);
2341                 displace_render_face(re, obr, vlr, scale, mat, imat);
2342         }
2343
2344         /* Recalc vertex normals */
2345         calc_vertexnormals(re, obr, 0, 0);
2346 }
2347
2348 /* ------------------------------------------------------------------------- */
2349 /* Metaball                                                                                                                              */
2350 /* ------------------------------------------------------------------------- */
2351
2352 static void init_render_mball(Render *re, ObjectRen *obr)
2353 {
2354         Object *ob= obr->ob;
2355         DispList *dl;
2356         VertRen *ver;
2357         VlakRen *vlr, *vlr1;
2358         Material *ma;
2359         float *data, *nors, *orco, mat[4][4], imat[3][3], xn, yn, zn;
2360         int a, need_orco, vlakindex, *index;
2361
2362         if (ob!=find_basis_mball(re->scene, ob))
2363                 return;
2364
2365         Mat4MulMat4(mat, ob->obmat, re->viewmat);
2366         Mat4Invert(ob->imat, mat);
2367         Mat3CpyMat4(imat, ob->imat);
2368
2369         ma= give_render_material(re, ob, 1);
2370
2371         need_orco= 0;
2372         if(ma->texco & TEXCO_ORCO) {
2373                 need_orco= 1;
2374         }
2375
2376         makeDispListMBall(re->scene, ob);
2377         dl= ob->disp.first;
2378         if(dl==0) return;
2379
2380         data= dl->verts;
2381         nors= dl->nors;
2382         orco= get_object_orco(re, ob);
2383
2384         for(a=0; a<dl->nr; a++, data+=3, nors+=3, orco+=3) {
2385
2386                 ver= RE_findOrAddVert(obr, obr->totvert++);
2387                 VECCOPY(ver->co, data);
2388                 Mat4MulVecfl(mat, ver->co);
2389
2390                 /* render normals are inverted */
2391                 xn= -nors[0];
2392                 yn= -nors[1];
2393                 zn= -nors[2];
2394
2395                 /* transpose ! */
2396                 ver->n[0]= imat[0][0]*xn+imat[0][1]*yn+imat[0][2]*zn;
2397                 ver->n[1]= imat[1][0]*xn+imat[1][1]*yn+imat[1][2]*zn;
2398                 ver->n[2]= imat[2][0]*xn+imat[2][1]*yn+imat[2][2]*zn;
2399                 Normalize(ver->n);
2400                 //if(ob->transflag & OB_NEG_SCALE) VecMulf(ver->n. -1.0);
2401
2402                 if(need_orco) ver->orco= orco;
2403         }
2404
2405         index= dl->index;
2406         for(a=0; a<dl->parts; a++, index+=4) {
2407
2408                 vlr= RE_findOrAddVlak(obr, obr->totvlak++);
2409                 vlr->v1= RE_findOrAddVert(obr, index[0]);
2410                 vlr->v2= RE_findOrAddVert(obr, index[1]);
2411                 vlr->v3= RE_findOrAddVert(obr, index[2]);
2412                 vlr->v4= 0;
2413
2414                 if(ob->transflag & OB_NEG_SCALE)
2415                         CalcNormFloat(vlr->v1->co, vlr->v2->co, vlr->v3->co, vlr->n);
2416                 else
2417                         CalcNormFloat(vlr->v3->co, vlr->v2->co, vlr->v1->co, vlr->n);
2418
2419                 vlr->mat= ma;
2420                 vlr->flag= ME_SMOOTH+R_NOPUNOFLIP;
2421                 vlr->ec= 0;
2422
2423                 /* mball -too bad- always has triangles, because quads can be non-planar */
2424                 if(index[3] && index[3]!=index[2]) {
2425                         vlr1= RE_findOrAddVlak(obr, obr->totvlak++);
2426                         vlakindex= vlr1->index;
2427                         *vlr1= *vlr;
2428                         vlr1->index= vlakindex;
2429                         vlr1->v2= vlr1->v3;
2430                         vlr1->v3= RE_findOrAddVert(obr, index[3]);
2431                         if(ob->transflag & OB_NEG_SCALE)
2432                                 CalcNormFloat(vlr1->v1->co, vlr1->v2->co, vlr1->v3->co, vlr1->n);
2433                         else
2434                                 CalcNormFloat(vlr1->v3->co, vlr1->v2->co, vlr1->v1->co, vlr1->n);
2435                 }
2436         }
2437
2438         /* enforce display lists remade */
2439         freedisplist(&ob->disp);
2440
2441         /* this enforces remake for real, orco displist is small (in scale) */
2442         ob->recalc |= OB_RECALC_DATA;
2443 }
2444
2445 /* ------------------------------------------------------------------------- */
2446 /* Surfaces and Curves                                                                                                           */
2447 /* ------------------------------------------------------------------------- */
2448
2449 /* returns amount of vertices added for orco */
2450 static int dl_surf_to_renderdata(ObjectRen *obr, DispList *dl, Material **matar, float *orco, float mat[4][4])
2451 {
2452         Object *ob= obr->ob;
2453         VertRen *v1, *v2, *v3, *v4, *ver;
2454         VlakRen *vlr, *vlr1, *vlr2, *vlr3;
2455         Curve *cu= ob->data;
2456         float *data, n1[3];
2457         int u, v, orcoret= 0;
2458         int p1, p2, p3, p4, a;
2459         int sizeu, nsizeu, sizev, nsizev;
2460         int startvert, startvlak;
2461
2462         startvert= obr->totvert;
2463         nsizeu = sizeu = dl->parts; nsizev = sizev = dl->nr;
2464
2465         data= dl->verts;
2466         for (u = 0; u < sizeu; u++) {
2467                 v1 = RE_findOrAddVert(obr, obr->totvert++); /* save this for possible V wrapping */
2468                 VECCOPY(v1->co, data); data += 3;
2469                 if(orco) {
2470                         v1->orco= orco; orco+= 3; orcoret++;
2471                 }
2472                 Mat4MulVecfl(mat, v1->co);
2473
2474                 for (v = 1; v < sizev; v++) {
2475                         ver= RE_findOrAddVert(obr, obr->totvert++);
2476                         VECCOPY(ver->co, data); data += 3;
2477                         if(orco) {
2478                                 ver->orco= orco; orco+= 3; orcoret++;
2479                         }
2480                         Mat4MulVecfl(mat, ver->co);
2481                 }
2482                 /* if V-cyclic, add extra vertices at end of the row */
2483                 if (dl->flag & DL_CYCL_U) {
2484                         ver= RE_findOrAddVert(obr, obr->totvert++);
2485                         VECCOPY(ver->co, v1->co);
2486                         if(orco) {
2487                                 ver->orco= orco; orco+=3; orcoret++; //orcobase + 3*(u*sizev + 0);
2488                         }
2489                 }
2490         }
2491
2492         /* Done before next loop to get corner vert */
2493         if (dl->flag & DL_CYCL_U) nsizev++;
2494         if (dl->flag & DL_CYCL_V) nsizeu++;
2495
2496         /* if U cyclic, add extra row at end of column */
2497         if (dl->flag & DL_CYCL_V) {
2498                 for (v = 0; v < nsizev; v++) {
2499                         v1= RE_findOrAddVert(obr, startvert + v);
2500                         ver= RE_findOrAddVert(obr, obr->totvert++);
2501                         VECCOPY(ver->co, v1->co);
2502                         if(orco) {
2503                                 ver->orco= orco; orco+=3; orcoret++; //ver->orco= orcobase + 3*(0*sizev + v);
2504                         }
2505                 }
2506         }
2507
2508         sizeu = nsizeu;
2509         sizev = nsizev;
2510
2511         startvlak= obr->totvlak;
2512
2513         for(u = 0; u < sizeu - 1; u++) {
2514                 p1 = startvert + u * sizev; /* walk through face list */
2515                 p2 = p1 + 1;
2516                 p3 = p2 + sizev;
2517                 p4 = p3 - 1;
2518
2519                 for(v = 0; v < sizev - 1; v++) {
2520                         v1= RE_findOrAddVert(obr, p1);
2521                         v2= RE_findOrAddVert(obr, p2);
2522                         v3= RE_findOrAddVert(obr, p3);
2523                         v4= RE_findOrAddVert(obr, p4);
2524
2525                         vlr= RE_findOrAddVlak(obr, obr->totvlak++);
2526                         vlr->v1= v1; vlr->v2= v2; vlr->v3= v3; vlr->v4= v4;
2527
2528                         CalcNormFloat4(vlr->v4->co, vlr->v3->co, vlr->v2->co, vlr->v1->co, n1);
2529
2530                         VECCOPY(vlr->n, n1);
2531
2532                         vlr->mat= matar[ dl->col];
2533                         vlr->ec= ME_V1V2+ME_V2V3;
2534                         vlr->flag= dl->rt;
2535                         if( (cu->flag & CU_NOPUNOFLIP) ) {
2536                                 vlr->flag |= R_NOPUNOFLIP;
2537                         }
2538
2539                         VecAddf(v1->n, v1->n, n1);
2540                         VecAddf(v2->n, v2->n, n1);
2541                         VecAddf(v3->n, v3->n, n1);
2542                         VecAddf(v4->n, v4->n, n1);
2543
2544                         p1++; p2++; p3++; p4++;
2545                 }
2546         }
2547         /* fix normals for U resp. V cyclic faces */
2548         sizeu--; sizev--;  /* dec size for face array */
2549         if (dl->flag & DL_CYCL_V) {
2550
2551                 for (v = 0; v < sizev; v++)
2552                 {
2553                         /* optimize! :*/
2554                         vlr= RE_findOrAddVlak(obr, UVTOINDEX(sizeu - 1, v));
2555                         vlr1= RE_findOrAddVlak(obr, UVTOINDEX(0, v));
2556                         VecAddf(vlr1->v1->n, vlr1->v1->n, vlr->n);
2557                         VecAddf(vlr1->v2->n, vlr1->v2->n, vlr->n);
2558                         VecAddf(vlr->v3->n, vlr->v3->n, vlr1->n);
2559                         VecAddf(vlr->v4->n, vlr->v4->n, vlr1->n);
2560                 }
2561         }
2562         if (dl->flag & DL_CYCL_U) {
2563
2564                 for (u = 0; u < sizeu; u++)
2565                 {
2566                         /* optimize! :*/
2567                         vlr= RE_findOrAddVlak(obr, UVTOINDEX(u, 0));
2568                         vlr1= RE_findOrAddVlak(obr, UVTOINDEX(u, sizev-1));
2569                         VecAddf(vlr1->v2->n, vlr1->v2->n, vlr->n);
2570                         VecAddf(vlr1->v3->n, vlr1->v3->n, vlr->n);
2571                         VecAddf(vlr->v1->n, vlr->v1->n, vlr1->n);
2572                         VecAddf(vlr->v4->n, vlr->v4->n, vlr1->n);
2573                 }
2574         }
2575         /* last vertex is an extra case:
2576
2577                 ^       ()----()----()----()
2578                 |       |     |     ||     |
2579                 u       |     |(0,n)||(0,0)|
2580                 |     |     ||     |
2581                 ()====()====[]====()
2582                 |     |     ||     |
2583                 |     |(m,n)||(m,0)|
2584                 |     |     ||     |
2585                 ()----()----()----()
2586                 v ->
2587
2588                 vertex [] is no longer shared, therefore distribute
2589                 normals of the surrounding faces to all of the duplicates of []
2590                 */
2591
2592         if ((dl->flag & DL_CYCL_V) && (dl->flag & DL_CYCL_U))
2593         {
2594                 vlr= RE_findOrAddVlak(obr, UVTOINDEX(sizeu - 1, sizev - 1)); /* (m,n) */
2595                 vlr1= RE_findOrAddVlak(obr, UVTOINDEX(0,0));  /* (0,0) */
2596                 VecAddf(n1, vlr->n, vlr1->n);
2597                 vlr2= RE_findOrAddVlak(obr, UVTOINDEX(0, sizev-1)); /* (0,n) */
2598                 VecAddf(n1, n1, vlr2->n);
2599                 vlr3= RE_findOrAddVlak(obr, UVTOINDEX(sizeu-1, 0)); /* (m,0) */
2600                 VecAddf(n1, n1, vlr3->n);
2601                 VECCOPY(vlr->v3->n, n1);
2602                 VECCOPY(vlr1->v1->n, n1);
2603                 VECCOPY(vlr2->v2->n, n1);
2604                 VECCOPY(vlr3->v4->n, n1);
2605         }
2606         for(a = startvert; a < obr->totvert; a++) {
2607                 ver= RE_findOrAddVert(obr, a);
2608                 Normalize(ver->n);
2609         }
2610
2611
2612         return orcoret;
2613 }
2614
2615 static void init_render_surf(Render *re, ObjectRen *obr)
2616 {
2617         Object *ob= obr->ob;
2618         Nurb *nu=0;
2619         Curve *cu;
2620         ListBase displist;
2621         DispList *dl;
2622         Material **matar;
2623         float *orco=NULL, *orcobase=NULL, mat[4][4];
2624         int a, totmat, need_orco=0;
2625
2626         cu= ob->data;
2627         nu= cu->nurb.first;
2628         if(nu==0) return;
2629
2630         Mat4MulMat4(mat, ob->obmat, re->viewmat);
2631         Mat4Invert(ob->imat, mat);
2632
2633         /* material array */
2634         totmat= ob->totcol+1;
2635         matar= MEM_callocN(sizeof(Material*)*totmat, "init_render_surf matar");
2636
2637         for(a=0; a<totmat; a++) {
2638                 matar[a]= give_render_material(re, ob, a+1);
2639
2640                 if(matar[a] && matar[a]->texco & TEXCO_ORCO)
2641                         need_orco= 1;
2642         }
2643
2644         if(ob->parent && (ob->parent->type==OB_LATTICE)) need_orco= 1;
2645
2646         if(need_orco) orcobase= orco= get_object_orco(re, ob);
2647
2648         displist.first= displist.last= 0;
2649         makeDispListSurf(re->scene, ob, &displist, 1, 0);
2650
2651         /* walk along displaylist and create rendervertices/-faces */
2652         for(dl=displist.first; dl; dl=dl->next) {
2653                 /* watch out: u ^= y, v ^= x !! */
2654                 if(dl->type==DL_SURF)
2655                         orco+= 3*dl_surf_to_renderdata(obr, dl, matar, orco, mat);
2656         }
2657
2658         freedisplist(&displist);
2659         MEM_freeN(matar);
2660 }
2661
2662 static void init_render_curve(Render *re, ObjectRen *obr, int timeoffset)
2663 {
2664         Object *ob= obr->ob;
2665         Curve *cu;
2666         VertRen *ver;
2667         VlakRen *vlr;
2668         DispList *dl;
2669         ListBase olddl={NULL, NULL};
2670         Material **matar;
2671         float len, *data, *fp, *orco=NULL, *orcobase= NULL;
2672         float n[3], mat[4][4];
2673         int nr, startvert, startvlak, a, b;
2674         int frontside, need_orco=0, totmat;
2675
2676         cu= ob->data;
2677         if(ob->type==OB_FONT && cu->str==NULL) return;
2678         else if(ob->type==OB_CURVE && cu->nurb.first==NULL) return;
2679
2680         /* no modifier call here, is in makedisp */
2681
2682         if(cu->resolu_ren)
2683                 SWAP(ListBase, olddl, cu->disp);
2684
2685         /* test displist */
2686         if(cu->disp.first==NULL)
2687                 makeDispListCurveTypes(re->scene, ob, 0);
2688         dl= cu->disp.first;
2689         if(cu->disp.first==NULL) return;
2690
2691         Mat4MulMat4(mat, ob->obmat, re->viewmat);
2692         Mat4Invert(ob->imat, mat);
2693
2694         /* material array */
2695         totmat= ob->totcol+1;
2696         matar= MEM_callocN(sizeof(Material*)*totmat, "init_render_surf matar");
2697
2698         for(a=0; a<totmat; a++) {
2699                 matar[a]= give_render_material(re, ob, a+1);
2700
2701                 if(matar[a] && matar[a]->texco & TEXCO_ORCO)
2702                         need_orco= 1;
2703         }
2704
2705         if(need_orco) orcobase=orco= get_object_orco(re, ob);
2706
2707         dl= cu->disp.first;
2708         while(dl) {
2709                 if(dl->type==DL_INDEX3) {
2710                         int *index;
2711
2712                         startvert= obr->totvert;
2713                         data= dl->verts;
2714
2715                         n[0]= ob->imat[0][2];
2716                         n[1]= ob->imat[1][2];
2717                         n[2]= ob->imat[2][2];
2718                         Normalize(n);
2719
2720                         for(a=0; a<dl->nr; a++, data+=3) {
2721                                 ver= RE_findOrAddVert(obr, obr->totvert++);
2722                                 VECCOPY(ver->co, data);
2723
2724                                 /* flip normal if face is backfacing, also used in face loop below */
2725                                 if(ver->co[2] < 0.0) {
2726                                         VECCOPY(ver->n, n);
2727                                         ver->flag = 1;
2728                                 }
2729                                 else {
2730                                         ver->n[0]= -n[0]; ver->n[1]= -n[1]; ver->n[2]= -n[2];
2731                                         ver->flag = 0;
2732                                 }
2733
2734                                 Mat4MulVecfl(mat, ver->co);
2735
2736                                 if (orco) {
2737                                         ver->orco = orco;
2738                                         orco += 3;
2739                                 }
2740                         }
2741
2742                         if(timeoffset==0) {
2743                                 startvlak= obr->totvlak;
2744                                 index= dl->index;
2745                                 for(a=0; a<dl->parts; a++, index+=3) {
2746
2747                                         vlr= RE_findOrAddVlak(obr, obr->totvlak++);
2748                                         vlr->v1= RE_findOrAddVert(obr, startvert+index[0]);
2749                                         vlr->v2= RE_findOrAddVert(obr, startvert+index[1]);
2750                                         vlr->v3= RE_findOrAddVert(obr, startvert+index[2]);
2751                                         vlr->v4= NULL;
2752
2753                                         if(vlr->v1->flag) {
2754                                                 VECCOPY(vlr->n, n);
2755                                         }
2756                                         else {
2757                                                 vlr->n[0]= -n[0]; vlr->n[1]= -n[1]; vlr->n[2]= -n[2];
2758                                         }
2759
2760                                         vlr->mat= matar[ dl->col ];
2761                                         vlr->flag= 0;
2762                                         if( (cu->flag & CU_NOPUNOFLIP) ) {
2763                                                 vlr->flag |= R_NOPUNOFLIP;
2764                                         }
2765                                         vlr->ec= 0;
2766                                 }
2767                         }
2768                 }
2769                 else if (dl->type==DL_SURF) {
2770
2771                         /* cyclic U means an extruded full circular curve, we skip bevel splitting then */
2772                         if (dl->flag & DL_CYCL_U) {
2773                                 orco+= 3*dl_surf_to_renderdata(obr, dl, matar, orco, mat);
2774                         }
2775                         else {
2776                                 int p1,p2,p3,p4;
2777
2778                                 fp= dl->verts;
2779                                 startvert= obr->totvert;
2780                                 nr= dl->nr*dl->parts;
2781
2782                                 while(nr--) {
2783                                         ver= RE_findOrAddVert(obr, obr->totvert++);
2784
2785                                         VECCOPY(ver->co, fp);
2786                                         Mat4MulVecfl(mat, ver->co);
2787                                         fp+= 3;
2788
2789                                         if (orco) {
2790                                                 ver->orco = orco;
2791                                                 orco += 3;
2792                                         }
2793                                 }
2794
2795                                 if(dl->bevelSplitFlag || timeoffset==0) {
2796                                         startvlak= obr->totvlak;
2797
2798                                         for(a=0; a<dl->parts; a++) {
2799
2800                                                 frontside= (a >= dl->nr/2);
2801
2802                                                 if (surfindex_displist(dl, a, &b, &p1, &p2, &p3, &p4)==0)
2803                                                         break;
2804
2805                                                 p1+= startvert;
2806                                                 p2+= startvert;
2807                                                 p3+= startvert;
2808                                                 p4+= startvert;
2809
2810                                                 for(; b<dl->nr; b++) {
2811                                                         vlr= RE_findOrAddVlak(obr, obr->totvlak++);
2812                                                         vlr->v1= RE_findOrAddVert(obr, p2);
2813                                                         vlr->v2= RE_findOrAddVert(obr, p1);
2814                                                         vlr->v3= RE_findOrAddVert(obr, p3);
2815                                                         vlr->v4= RE_findOrAddVert(obr, p4);
2816                                                         vlr->ec= ME_V2V3+ME_V3V4;
2817                                                         if(a==0) vlr->ec+= ME_V1V2;
2818
2819                                                         vlr->flag= dl->rt;
2820
2821                                                         /* this is not really scientific: the vertices
2822                                                                 * 2, 3 en 4 seem to give better vertexnormals than 1 2 3:
2823                                                                 * front and backside treated different!!
2824                                                                 */
2825
2826                                                         if(frontside)
2827                                                                 CalcNormFloat(vlr->v2->co, vlr->v3->co, vlr->v4->co, vlr->n);
2828                                                         else
2829                                                                 CalcNormFloat(vlr->v1->co, vlr->v2->co, vlr->v3->co, vlr->n);
2830
2831                                                         vlr->mat= matar[ dl->col ];
2832
2833                                                         p4= p3;
2834                                                         p3++;
2835                                                         p2= p1;
2836                                                         p1++;
2837                                                 }
2838                                         }
2839
2840                                         if (dl->bevelSplitFlag) {
2841                                                 for(a=0; a<dl->parts-1+!!(dl->flag&DL_CYCL_V); a++)
2842                                                         if(dl->bevelSplitFlag[a>>5]&(1<<(a&0x1F)))
2843                                                                 split_v_renderfaces(obr, startvlak, startvert, dl->parts, dl->nr, a, dl->flag&DL_CYCL_V, dl->flag&DL_CYCL_U);
2844                                         }
2845
2846                                         /* vertex normals */
2847                                         for(a= startvlak; a<obr->totvlak; a++) {
2848                                                 vlr= RE_findOrAddVlak(obr, a);
2849
2850                                                 VecAddf(vlr->v1->n, vlr->v1->n, vlr->n);
2851                                                 VecAddf(vlr->v3->n, vlr->v3->n, vlr->n);
2852                                                 VecAddf(vlr->v2->n, vlr->v2->n, vlr->n);
2853                                                 VecAddf(vlr->v4->n, vlr->v4->n, vlr->n);
2854                                         }
2855                                         for(a=startvert; a<obr->totvert; a++) {
2856                                                 ver= RE_findOrAddVert(obr, a);
2857                                                 len= Normalize(ver->n);
2858                                                 if(len==0.0) ver->flag= 1;      /* flag abuse, its only used in zbuf now  */
2859                                                 else ver->flag= 0;
2860                                         }
2861                                         for(a= startvlak; a<obr->totvlak; a++) {
2862                                                 vlr= RE_findOrAddVlak(obr, a);
2863                                                 if(vlr->v1->flag) VECCOPY(vlr->v1->n, vlr->n);
2864                                                 if(vlr->v2->flag) VECCOPY(vlr->v2->n, vlr->n);
2865                                                 if(vlr->v3->flag) VECCOPY(vlr->v3->n, vlr->n);
2866                                                 if(vlr->v4->flag) VECCOPY(vlr->v4->n, vlr->n);
2867                                         }
2868                                 }
2869                         }
2870                 }
2871
2872                 dl= dl->next;
2873         }
2874
2875         /* not very elegant... but we want original displist in UI */
2876         if(cu->resolu_ren) {
2877                 freedisplist(&cu->disp);
2878                 SWAP(ListBase, olddl, cu->disp);
2879         }
2880
2881         MEM_freeN(matar);
2882 }
2883
2884 /* ------------------------------------------------------------------------- */
2885 /* Mesh                                                                                                                                  */
2886 /* ------------------------------------------------------------------------- */
2887
2888 struct edgesort {
2889         int v1, v2;
2890         int f;
2891         int i1, i2;
2892 };
2893
2894 /* edges have to be added with lowest index first for sorting */