source/blender/render/intern/source/shadeinput.c

   1 /*
   2  * ***** BEGIN GPL LICENSE BLOCK *****
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  *
  18  * The Original Code is Copyright (C) 2006 Blender Foundation
  19  * All rights reserved.
  20  *
  21  * Contributors: Hos, Robert Wenzlaff.
  22  *
  23  * ***** END GPL LICENSE BLOCK *****
  24  */
  25
  26 /** \file blender/render/intern/source/shadeinput.c
  27  *  \ingroup render
  28  */
  29
  30
  31 #include <stdio.h>
  32 #include <math.h>
  33 #include <string.h>
  34
  35
  36 #include "BLI_math.h"
  37 #include "BLI_blenlib.h"
  38 #include "BLI_utildefines.h"
  39
  40 #include "DNA_curve_types.h"
  41 #include "DNA_group_types.h"
  42 #include "DNA_lamp_types.h"
  43 #include "DNA_meshdata_types.h"
  44 #include "DNA_material_types.h"
  45
  46 #include "BKE_colortools.h"
  47 #include "BKE_scene.h"
  48
  49 #include "BKE_node.h"
  50
  51 /* local include */
  52 #include "raycounter.h"
  53 #include "renderpipeline.h"
  54 #include "render_types.h"
  55 #include "renderdatabase.h"
  56 #include "rendercore.h"
  57 #include "shadbuf.h"
  58 #include "shading.h"
  59 #include "strand.h"
  60 #include "texture.h"
  61 #include "volumetric.h"
  62 #include "zbuf.h"
  63
  64 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
  65 /* defined in pipeline.c, is hardcopy of active dynamic allocated Render */
  66 /* only to be used here in this file, it's for speed */
  67 extern struct Render R;
  68 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
  69
  70 /* Shade Sample order:
  71  *
  72  * - shade_samples_fill_with_ps()
  73  *     - for each sample
  74  *         - shade_input_set_triangle()  <- if prev sample-face is same, use shade_input_copy_triangle()
  75  *         - if vlr
  76  *             - shade_input_set_viewco()    <- not for ray or bake
  77  *             - shade_input_set_uv()        <- not for ray or bake
  78  *             - shade_input_set_normals()
  79  * - shade_samples()
  80  *     - if AO
  81  *         - shade_samples_do_AO()
  82  *     - if shading happens
  83  *         - for each sample
  84  *             - shade_input_set_shade_texco()
  85  *             - shade_samples_do_shade()
  86  * - OSA: distribute sample result with filter masking
  87  *
  88  */
  89
  90 /* initialize material variables in shadeinput,
  91  * doing inverse gamma correction where applicable */
  92 void shade_input_init_material(ShadeInput *shi)
  93 {
  94         /* note, keep this synced with render_types.h */
  95         memcpy(&shi->r, &shi->mat->r, 23 * sizeof(float));
  96         shi->har = shi->mat->har;
  97 }
  98
  99 /* also used as callback for nodes */
 100 /* delivers a fully filled in ShadeResult, for all passes */
 101 void shade_material_loop(ShadeInput *shi, ShadeResult *shr)
 102 {
 103
 104         shade_lamp_loop(shi, shr);  /* clears shr */
 105
 106         if (shi->translucency != 0.0f) {
 107                 ShadeResult shr_t;
 108                 float fac = shi->translucency;
 109
 110                 shade_input_init_material(shi);
 111                 negate_v3_v3(shi->vn, shi->vno);
 112                 negate_v3(shi->facenor);
 113                 shi->depth++;   /* hack to get real shadow now */
 114                 shade_lamp_loop(shi, &shr_t);
 115                 shi->depth--;
 116
 117                 /* a couple of passes */
 118                 madd_v3_v3fl(shr->combined, shr_t.combined, fac);
 119                 if (shi->passflag & SCE_PASS_SPEC)
 120                         madd_v3_v3fl(shr->spec, shr_t.spec, fac);
 121                 if (shi->passflag & SCE_PASS_DIFFUSE) {
 122                         madd_v3_v3fl(shr->diff, shr_t.diff, fac);
 123                         madd_v3_v3fl(shr->diffshad, shr_t.diffshad, fac);
 124                 }
 125                 if (shi->passflag & SCE_PASS_SHADOW)
 126                         madd_v3_v3fl(shr->shad, shr_t.shad, fac);
 127
 128                 negate_v3(shi->vn);
 129                 negate_v3(shi->facenor);
 130         }
 131
 132         /* depth >= 1 when ray-shading */
 133         if (shi->depth == 0 || shi->volume_depth > 0) {
 134                 if (R.r.mode & R_RAYTRACE) {
 135                         if (shi->ray_mirror != 0.0f || ((shi->mode & MA_TRANSP) && (shi->mode & MA_RAYTRANSP) && shr->alpha != 1.0f)) {
 136                                 /* ray trace works on combined, but gives pass info */
 137                                 ray_trace(shi, shr);
 138                         }
 139                 }
 140                 /* disable adding of sky for raytransp */
 141                 if ((shi->mode & MA_TRANSP) && (shi->mode & MA_RAYTRANSP))
 142                         if ((shi->layflag & SCE_LAY_SKY) && (R.r.alphamode == R_ADDSKY))
 143                                 shr->alpha = 1.0f;
 144         }
 145
 146         if (R.r.mode & R_RAYTRACE) {
 147                 if (R.render_volumes_inside.first)
 148                         shade_volume_inside(shi, shr);
 149         }
 150 }
 151
 152
 153 /* do a shade, finish up some passes, apply mist */
 154 void shade_input_do_shade(ShadeInput *shi, ShadeResult *shr)
 155 {
 156         bool compat = false;
 157         float alpha;
 158
 159         /* ------  main shading loop -------- */
 160 #ifdef RE_RAYCOUNTER
 161         memset(&shi->raycounter, 0, sizeof(shi->raycounter));
 162 #endif
 163
 164         if (shi->mat->nodetree && shi->mat->use_nodes)
 165                 compat = ntreeShaderExecTree(shi->mat->nodetree, shi, shr);
 166
 167         /* also run this when node shaders fail, due to incompatible shader nodes */
 168         if (compat == false) {
 169                 /* copy all relevant material vars, note, keep this synced with render_types.h */
 170                 shade_input_init_material(shi);
 171
 172                 if (shi->mat->material_type == MA_TYPE_VOLUME) {
 173                         if (R.r.mode & R_RAYTRACE) {
 174                                 shade_volume_outside(shi, shr);
 175                         }
 176                 }
 177                 else { /* MA_TYPE_SURFACE, MA_TYPE_WIRE */
 178                         shade_material_loop(shi, shr);
 179                 }
 180         }
 181
 182         /* copy additional passes */
 183         if (shi->passflag & (SCE_PASS_VECTOR | SCE_PASS_NORMAL)) {
 184                 copy_v4_v4(shr->winspeed, shi->winspeed);
 185                 copy_v3_v3(shr->nor, shi->vn);
 186         }
 187
 188         /* MIST */
 189         if ((shi->passflag & SCE_PASS_MIST) || ((R.wrld.mode & WO_MIST) && (shi->mat->mode & MA_NOMIST) == 0)) {
 190                 if (R.r.mode & R_ORTHO)
 191                         shr->mist = mistfactor(-shi->co[2], shi->co);
 192                 else
 193                         shr->mist = mistfactor(len_v3(shi->co), shi->co);
 194         }
 195         else shr->mist = 0.0f;
 196
 197         if ((R.wrld.mode & WO_MIST) && (shi->mat->mode & MA_NOMIST) == 0) {
 198                 alpha = shr->mist;
 199         }
 200         else alpha = 1.0f;
 201
 202         /* add mist and premul color */
 203         if (shr->alpha != 1.0f || alpha != 1.0f) {
 204                 float fac = alpha * (shr->alpha);
 205                 shr->combined[3] = fac;
 206
 207                 if (shi->mat->material_type != MA_TYPE_VOLUME)
 208                         mul_v3_fl(shr->combined, fac);
 209         }
 210         else
 211                 shr->combined[3] = 1.0f;
 212
 213         /* add z */
 214         shr->z = -shi->co[2];
 215
 216         /* RAYHITS */
 217 #if 0
 218         if (1 || shi->passflag & SCE_PASS_RAYHITS) {
 219                 shr->rayhits[0] = (float)shi->raycounter.faces.test;
 220                 shr->rayhits[1] = (float)shi->raycounter.bb.hit;
 221                 shr->rayhits[2] = 0.0;
 222                 shr->rayhits[3] = 1.0;
 223         }
 224 #endif
 225
 226         RE_RC_MERGE(&re_rc_counter[shi->thread], &shi->raycounter);
 227 }
 228
 229 /* **************************************************************************** */
 230 /*                    ShadeInput                                                */
 231 /* **************************************************************************** */
 232
 233
 234 void vlr_set_uv_indices(VlakRen *vlr, int *i1, int *i2, int *i3)
 235 {
 236         /* to prevent storing new tfaces or vcols, we check a split runtime */
 237         /*              4---3           4---3 */
 238         /*              |\ 1|   or  |1 /| */
 239         /*              |0\ |           |/ 0| */
 240         /*              1---2           1---2   0 = orig face, 1 = new face */
 241
 242         /* Update vert nums to point to correct verts of original face */
 243         if (vlr->flag & R_DIVIDE_24) {
 244                 if (vlr->flag & R_FACE_SPLIT) {
 245                         (*i1)++; (*i2)++; (*i3)++;
 246                 }
 247                 else {
 248                         (*i3)++;
 249                 }
 250         }
 251         else if (vlr->flag & R_FACE_SPLIT) {
 252                 (*i2)++; (*i3)++;
 253         }
 254 }
 255
 256 /* copy data from face to ShadeInput, general case */
 257 /* indices 0 1 2 3 only */
 258 void shade_input_set_triangle_i(ShadeInput *shi, ObjectInstanceRen *obi, VlakRen *vlr, short i1, short i2, short i3)
 259 {
 260         VertRen **vpp = &vlr->v1;
 261
 262         shi->vlr = vlr;
 263         shi->obi = obi;
 264         shi->obr = obi->obr;
 265
 266         shi->v1 = vpp[i1];
 267         shi->v2 = vpp[i2];
 268         shi->v3 = vpp[i3];
 269
 270         shi->i1 = i1;
 271         shi->i2 = i2;
 272         shi->i3 = i3;
 273
 274         /* note, shi->mat is set in node shaders */
 275         shi->mat = shi->mat_override ? shi->mat_override : vlr->mat;
 276
 277         shi->osatex = (shi->mat->texco & TEXCO_OSA);
 278         shi->mode = shi->mat->mode_l;        /* or-ed result for all nodes */
 279
 280         /* facenormal copy, can get flipped */
 281         shi->flippednor = 0;
 282         RE_vlakren_get_normal(&R, obi, vlr, shi->facenor);
 283
 284         /* calculate vertexnormals */
 285         if (vlr->flag & R_SMOOTH) {
 286                 copy_v3_v3(shi->n1, shi->v1->n);
 287                 copy_v3_v3(shi->n2, shi->v2->n);
 288                 copy_v3_v3(shi->n3, shi->v3->n);
 289
 290                 if (obi->flag & R_TRANSFORMED) {
 291                         mul_m3_v3(obi->nmat, shi->n1); normalize_v3(shi->n1);
 292                         mul_m3_v3(obi->nmat, shi->n2); normalize_v3(shi->n2);
 293                         mul_m3_v3(obi->nmat, shi->n3); normalize_v3(shi->n3);
 294                 }
 295         }
 296 }
 297
 298 /* note, facenr declared volatile due to over-eager -O2 optimization's
 299  * on cygwin (particularly -frerun-cse-after-loop)
 300  */
 301
 302 /* copy data from face to ShadeInput, scanline case */
 303 void shade_input_set_triangle(ShadeInput *shi, volatile int obi, volatile int facenr, int UNUSED(normal_flip))
 304 {
 305         if (facenr > 0) {
 306                 shi->obi = &R.objectinstance[obi];
 307                 shi->obr = shi->obi->obr;
 308                 shi->facenr = (facenr - 1) & RE_QUAD_MASK;
 309                 if (shi->facenr < shi->obr->totvlak) {
 310                         VlakRen *vlr = RE_findOrAddVlak(shi->obr, shi->facenr);
 311
 312                         if (facenr & RE_QUAD_OFFS)
 313                                 shade_input_set_triangle_i(shi, shi->obi, vlr, 0, 2, 3);
 314                         else
 315                                 shade_input_set_triangle_i(shi, shi->obi, vlr, 0, 1, 2);
 316                 }
 317                 else
 318                         shi->vlr = NULL;  /* general signal we got sky */
 319         }
 320         else
 321                 shi->vlr = NULL;  /* general signal we got sky */
 322 }
 323
 324 /* full osa case: copy static info */
 325 void shade_input_copy_triangle(ShadeInput *shi, ShadeInput *from)
 326 {
 327         /* not so nice, but works... warning is in RE_shader_ext.h */
 328         memcpy(shi, from, sizeof(struct ShadeInputCopy));
 329 }
 330
 331 /* copy data from strand to shadeinput */
 332 void shade_input_set_strand(ShadeInput *shi, StrandRen *strand, StrandPoint *spoint)
 333 {
 334         /* note, shi->mat is set in node shaders */
 335         shi->mat = shi->mat_override ? shi->mat_override : strand->buffer->ma;
 336
 337         shi->osatex = (shi->mat->texco & TEXCO_OSA);
 338         shi->mode = shi->mat->mode_l;        /* or-ed result for all nodes */
 339
 340         /* shade_input_set_viewco equivalent */
 341         copy_v3_v3(shi->co, spoint->co);
 342         copy_v3_v3(shi->view, shi->co);
 343         normalize_v3(shi->view);
 344
 345         shi->xs = (int)spoint->x;
 346         shi->ys = (int)spoint->y;
 347
 348         if (shi->osatex || (R.r.mode & R_SHADOW)) {
 349                 copy_v3_v3(shi->dxco, spoint->dtco);
 350                 copy_v3_v3(shi->dyco, spoint->dsco);
 351         }
 352
 353         /* dxview, dyview, not supported */
 354
 355         /* facenormal, simply viewco flipped */
 356         copy_v3_v3(shi->facenor, spoint->nor);
 357
 358         /* shade_input_set_normals equivalent */
 359         if (shi->mat->mode & MA_TANGENT_STR) {
 360                 copy_v3_v3(shi->vn, spoint->tan);
 361         }
 362         else {
 363                 float cross[3];
 364
 365                 cross_v3_v3v3(cross, spoint->co, spoint->tan);
 366                 cross_v3_v3v3(shi->vn, cross, spoint->tan);
 367                 normalize_v3(shi->vn);
 368
 369                 if (dot_v3v3(shi->vn, shi->view) < 0.0f)
 370                         negate_v3(shi->vn);
 371         }
 372
 373         copy_v3_v3(shi->vno, shi->vn);
 374 }
 375
 376 void shade_input_set_strand_texco(ShadeInput *shi, StrandRen *strand, StrandVert *svert, StrandPoint *spoint)
 377 {
 378         StrandBuffer *strandbuf = strand->buffer;
 379         ObjectRen *obr = strandbuf->obr;
 380         StrandVert *sv;
 381         int mode = shi->mode;        /* or-ed result for all nodes */
 382         short texco = shi->mat->texco;
 383
 384         if ((shi->mat->texco & TEXCO_REFL)) {
 385                 /* shi->dxview, shi->dyview, not supported */
 386         }
 387
 388         if (shi->osatex && (texco & (TEXCO_NORM | TEXCO_REFL))) {
 389                 /* not supported */
 390         }
 391
 392         if (mode & (MA_TANGENT_V | MA_NORMAP_TANG)) {
 393                 copy_v3_v3(shi->tang, spoint->tan);
 394                 copy_v3_v3(shi->nmaptang, spoint->tan);
 395         }
 396
 397         if (mode & MA_STR_SURFDIFF) {
 398                 float *surfnor = RE_strandren_get_surfnor(obr, strand, 0);
 399
 400                 if (surfnor)
 401                         copy_v3_v3(shi->surfnor, surfnor);
 402                 else
 403                         copy_v3_v3(shi->surfnor, shi->vn);
 404
 405                 if (shi->mat->strand_surfnor > 0.0f) {
 406                         shi->surfdist = 0.0f;
 407                         for (sv = strand->vert; sv != svert; sv++)
 408                                 shi->surfdist += len_v3v3(sv->co, (sv + 1)->co);
 409                         shi->surfdist += spoint->t * len_v3v3(sv->co, (sv + 1)->co);
 410                 }
 411         }
 412
 413         if (R.r.mode & R_SPEED) {
 414                 float *speed;
 415
 416                 speed = RE_strandren_get_winspeed(shi->obi, strand, 0);
 417                 if (speed)
 418                         copy_v4_v4(shi->winspeed, speed);
 419                 else
 420                         shi->winspeed[0] = shi->winspeed[1] = shi->winspeed[2] = shi->winspeed[3] = 0.0f;
 421         }
 422
 423         /* shade_input_set_shade_texco equivalent */
 424         if (texco & NEED_UV) {
 425                 if (texco & TEXCO_ORCO) {
 426                         copy_v3_v3(shi->lo, strand->orco);
 427                         /* no shi->osatex, orco derivatives are zero */
 428                 }
 429
 430                 if (texco & TEXCO_GLOB) {
 431                         copy_v3_v3(shi->gl, shi->co);
 432                         mul_m4_v3(R.viewinv, shi->gl);
 433
 434                         if (shi->osatex) {
 435                                 copy_v3_v3(shi->dxgl, shi->dxco);
 436                                 mul_mat3_m4_v3(R.viewinv, shi->dxgl);
 437                                 copy_v3_v3(shi->dygl, shi->dyco);
 438                                 mul_mat3_m4_v3(R.viewinv, shi->dygl);
 439                         }
 440                 }
 441
 442                 if (texco & TEXCO_STRAND) {
 443                         shi->strandco = spoint->strandco;
 444
 445                         if (shi->osatex) {
 446                                 shi->dxstrand = spoint->dtstrandco;
 447                                 shi->dystrand = 0.0f;
 448                         }
 449                 }
 450
 451                 if ((texco & TEXCO_UV) || (mode & (MA_VERTEXCOL | MA_VERTEXCOLP | MA_FACETEXTURE))) {
 452                         MCol *mcol;
 453                         float *uv;
 454                         char *name;
 455                         int i;
 456
 457                         shi->totuv = 0;
 458                         shi->totcol = 0;
 459                         shi->actuv = obr->actmtface;
 460                         shi->actcol = obr->actmcol;
 461
 462                         if (mode & (MA_VERTEXCOL | MA_VERTEXCOLP)) {
 463                                 for (i = 0; (mcol = RE_strandren_get_mcol(obr, strand, i, &name, 0)); i++) {
 464                                         ShadeInputCol *scol = &shi->col[i];
 465                                         char *cp = (char *)mcol;
 466
 467                                         shi->totcol++;
 468                                         scol->name = name;
 469
 470                                         scol->col[0] = cp[3] / 255.0f;
 471                                         scol->col[1] = cp[2] / 255.0f;
 472                                         scol->col[2] = cp[1] / 255.0f;
 473                                         scol->col[3] = cp[0] / 255.0f;
 474                                 }
 475
 476                                 if (shi->totcol) {
 477                                         shi->vcol[0] = shi->col[shi->actcol].col[0];
 478                                         shi->vcol[1] = shi->col[shi->actcol].col[1];
 479                                         shi->vcol[2] = shi->col[shi->actcol].col[2];
 480                                         shi->vcol[3] = shi->col[shi->actcol].col[3];
 481                                 }
 482                                 else {
 483                                         shi->vcol[0] = 0.0f;
 484                                         shi->vcol[1] = 0.0f;
 485                                         shi->vcol[2] = 0.0f;
 486                                         shi->vcol[3] = 0.0f;
 487                                 }
 488                         }
 489
 490                         for (i = 0; (uv = RE_strandren_get_uv(obr, strand, i, &name, 0)); i++) {
 491                                 ShadeInputUV *suv = &shi->uv[i];
 492
 493                                 shi->totuv++;
 494                                 suv->name = name;
 495
 496                                 if (strandbuf->overrideuv == i) {
 497                                         suv->uv[0] = -1.0f;
 498                                         suv->uv[1] = spoint->strandco;
 499                                         suv->uv[2] = 0.0f;
 500                                 }
 501                                 else {
 502                                         suv->uv[0] = -1.0f + 2.0f * uv[0];
 503                                         suv->uv[1] = -1.0f + 2.0f * uv[1];
 504                                         suv->uv[2] = 0.0f;   /* texture.c assumes there are 3 coords */
 505                                 }
 506
 507                                 if (shi->osatex) {
 508                                         suv->dxuv[0] = 0.0f;
 509                                         suv->dxuv[1] = 0.0f;
 510                                         suv->dyuv[0] = 0.0f;
 511                                         suv->dyuv[1] = 0.0f;
 512                                 }
 513
 514                                 if ((mode & MA_FACETEXTURE) && i == obr->actmtface) {
 515                                         if ((mode & (MA_VERTEXCOL | MA_VERTEXCOLP)) == 0) {
 516                                                 shi->vcol[0] = 1.0f;
 517                                                 shi->vcol[1] = 1.0f;
 518                                                 shi->vcol[2] = 1.0f;
 519                                                 shi->vcol[3] = 1.0f;
 520                                         }
 521                                 }
 522                         }
 523
 524                         if (shi->totuv == 0) {
 525                                 ShadeInputUV *suv = &shi->uv[0];
 526
 527                                 suv->uv[0] = 0.0f;
 528                                 suv->uv[1] = spoint->strandco;
 529                                 suv->uv[2] = 0.0f;   /* texture.c assumes there are 3 coords */
 530
 531                                 if (mode & MA_FACETEXTURE) {
 532                                         /* no tface? set at 1.0f */
 533                                         shi->vcol[0] = 1.0f;
 534                                         shi->vcol[1] = 1.0f;
 535                                         shi->vcol[2] = 1.0f;
 536                                         shi->vcol[3] = 1.0f;
 537                                 }
 538                         }
 539
 540                 }
 541
 542                 if (texco & TEXCO_NORM) {
 543                         shi->orn[0] = -shi->vn[0];
 544                         shi->orn[1] = -shi->vn[1];
 545                         shi->orn[2] = -shi->vn[2];
 546                 }
 547
 548                 if (texco & TEXCO_STRESS) {
 549                         /* not supported */
 550                 }
 551
 552                 if (texco & TEXCO_TANGENT) {
 553                         if ((mode & MA_TANGENT_V) == 0) {
 554                                 /* just prevent surprises */
 555                                 shi->tang[0] = shi->tang[1] = shi->tang[2] = 0.0f;
 556                                 shi->nmaptang[0] = shi->nmaptang[1] = shi->nmaptang[2] = 0.0f;
 557                         }
 558                 }
 559         }
 560
 561         /* this only avalailable for scanline renders */
 562         if (shi->depth == 0) {
 563                 if (texco & TEXCO_WINDOW) {
 564                         shi->winco[0] = -1.0f + 2.0f * spoint->x / (float)R.winx;
 565                         shi->winco[1] = -1.0f + 2.0f * spoint->y / (float)R.winy;
 566                         shi->winco[2] = 0.0f;
 567
 568                         /* not supported */
 569                         if (shi->osatex) {
 570                                 shi->dxwin[0] = 0.0f;
 571                                 shi->dywin[1] = 0.0f;
 572                                 shi->dxwin[0] = 0.0f;
 573                                 shi->dywin[1] = 0.0f;
 574                         }
 575                 }
 576         }
 577
 578         if (shi->do_manage) {
 579                 if (mode & (MA_VERTEXCOL | MA_VERTEXCOLP | MA_FACETEXTURE)) {
 580                         srgb_to_linearrgb_v3_v3(shi->vcol, shi->vcol);
 581                 }
 582         }
 583
 584 }
 585
 586 /* from scanline pixel coordinates to 3d coordinates, requires set_triangle */
 587 void shade_input_calc_viewco(ShadeInput *shi, float x, float y, float z, float view[3], float dxyview[2], float co[3], float dxco[3], float dyco[3])
 588 {
 589         /* returns not normalized, so is in viewplane coords */
 590         calc_view_vector(view, x, y);
 591
 592         if (shi->mat->material_type == MA_TYPE_WIRE) {
 593                 /* wire cannot use normal for calculating shi->co, so
 594                  * we reconstruct the coordinate less accurate */
 595                 if (R.r.mode & R_ORTHO)
 596                         calc_renderco_ortho(co, x, y, z);
 597                 else
 598                         calc_renderco_zbuf(co, view, z);
 599         }
 600         else {
 601                 /* for non-wire, intersect with the triangle to get the exact coord */
 602                 float fac, dface, v1[3];
 603
 604                 copy_v3_v3(v1, shi->v1->co);
 605                 if (shi->obi->flag & R_TRANSFORMED)
 606                         mul_m4_v3(shi->obi->mat, v1);
 607
 608                 dface = dot_v3v3(v1, shi->facenor);
 609
 610                 /* ortho viewplane cannot intersect using view vector originating in (0,0,0) */
 611                 if (R.r.mode & R_ORTHO) {
 612                         /* x and y 3d coordinate can be derived from pixel coord and winmat */
 613                         float fx = 2.0f / (R.winx * R.winmat[0][0]);
 614                         float fy = 2.0f / (R.winy * R.winmat[1][1]);
 615
 616                         co[0] = (x - 0.5f * R.winx) * fx - R.winmat[3][0] / R.winmat[0][0];
 617                         co[1] = (y - 0.5f * R.winy) * fy - R.winmat[3][1] / R.winmat[1][1];
 618
 619                         /* using a*x + b*y + c*z = d equation, (a b c) is normal */
 620                         if (shi->facenor[2] != 0.0f)
 621                                 co[2] = (dface - shi->facenor[0] * co[0] - shi->facenor[1] * co[1]) / shi->facenor[2];
 622                         else
 623                                 co[2] = 0.0f;
 624
 625                         if (dxco && dyco) {
 626                                 dxco[0] = fx;
 627                                 dxco[1] = 0.0f;
 628                                 if (shi->facenor[2] != 0.0f)
 629                                         dxco[2] = -(shi->facenor[0] * fx) / shi->facenor[2];
 630                                 else
 631                                         dxco[2] = 0.0f;
 632
 633                                 dyco[0] = 0.0f;
 634                                 dyco[1] = fy;
 635                                 if (shi->facenor[2] != 0.0f)
 636                                         dyco[2] = -(shi->facenor[1] * fy) / shi->facenor[2];
 637                                 else
 638                                         dyco[2] = 0.0f;
 639
 640                                 if (dxyview) {
 641                                         if (co[2] != 0.0f) fac = 1.0f / co[2]; else fac = 0.0f;
 642                                         dxyview[0] = -R.viewdx * fac;
 643                                         dxyview[1] = -R.viewdy * fac;
 644                                 }
 645                         }
 646                 }
 647                 else {
 648                         float div;
 649
 650                         div = dot_v3v3(shi->facenor, view);
 651                         if (div != 0.0f) fac = dface / div;
 652                         else fac = 0.0f;
 653
 654                         co[0] = fac * view[0];
 655                         co[1] = fac * view[1];
 656                         co[2] = fac * view[2];
 657
 658                         /* pixel dx/dy for render coord */
 659                         if (dxco && dyco) {
 660                                 float u = dface / (div - R.viewdx * shi->facenor[0]);
 661                                 float v = dface / (div - R.viewdy * shi->facenor[1]);
 662
 663                                 dxco[0] = co[0] - (view[0] - R.viewdx) * u;
 664                                 dxco[1] = co[1] - (view[1]) * u;
 665                                 dxco[2] = co[2] - (view[2]) * u;
 666
 667                                 dyco[0] = co[0] - (view[0]) * v;
 668                                 dyco[1] = co[1] - (view[1] - R.viewdy) * v;
 669                                 dyco[2] = co[2] - (view[2]) * v;
 670
 671                                 if (dxyview) {
 672                                         if (fac != 0.0f) fac = 1.0f / fac;
 673                                         dxyview[0] = -R.viewdx * fac;
 674                                         dxyview[1] = -R.viewdy * fac;
 675                                 }
 676                         }
 677                 }
 678         }
 679
 680         /* set camera coords - for scanline, it's always 0.0,0.0,0.0 (render is in camera space)
 681          * however for raytrace it can be different - the position of the last intersection */
 682         shi->camera_co[0] = shi->camera_co[1] = shi->camera_co[2] = 0.0f;
 683
 684         /* cannot normalize earlier, code above needs it at viewplane level */
 685         normalize_v3(view);
 686 }
 687
 688 /* from scanline pixel coordinates to 3d coordinates, requires set_triangle */
 689 void shade_input_set_viewco(ShadeInput *shi, float x, float y, float xs, float ys, float z)
 690 {
 691         float *dxyview = NULL, *dxco = NULL, *dyco = NULL;
 692
 693         /* currently in use for dithering (soft shadow), node preview, irregular shad */
 694         shi->xs = (int)xs;
 695         shi->ys = (int)ys;
 696
 697         /* original scanline coordinate without jitter */
 698         shi->scanco[0] = x;
 699         shi->scanco[1] = y;
 700         shi->scanco[2] = z;
 701
 702         /* check if we need derivatives */
 703         if (shi->osatex || (R.r.mode & R_SHADOW)) {
 704                 dxco = shi->dxco;
 705                 dyco = shi->dyco;
 706
 707                 if ((shi->mat->texco & TEXCO_REFL))
 708                         dxyview = &shi->dxview;
 709         }
 710
 711         shade_input_calc_viewco(shi, xs, ys, z, shi->view, dxyview, shi->co, dxco, dyco);
 712 }
 713
 714 /* calculate U and V, for scanline (silly render face u and v are in range -1 to 0) */
 715 void shade_input_set_uv(ShadeInput *shi)
 716 {
 717         VlakRen *vlr = shi->vlr;
 718
 719         if ((vlr->flag & R_SMOOTH) || (shi->mat->texco & NEED_UV) || (shi->passflag & SCE_PASS_UV)) {
 720                 float v1[3], v2[3], v3[3];
 721
 722                 copy_v3_v3(v1, shi->v1->co);
 723                 copy_v3_v3(v2, shi->v2->co);
 724                 copy_v3_v3(v3, shi->v3->co);
 725
 726                 if (shi->obi->flag & R_TRANSFORMED) {
 727                         mul_m4_v3(shi->obi->mat, v1);
 728                         mul_m4_v3(shi->obi->mat, v2);
 729                         mul_m4_v3(shi->obi->mat, v3);
 730                 }
 731
 732                 /* exception case for wire render of edge */
 733                 if (vlr->v2 == vlr->v3) {
 734                         float lend, lenc;
 735
 736                         lend = len_v3v3(v2, v1);
 737                         lenc = len_v3v3(shi->co, v1);
 738
 739                         if (lend == 0.0f) {
 740                                 shi->u = shi->v = 0.0f;
 741                         }
 742                         else {
 743                                 shi->u = -(1.0f - lenc / lend);
 744                                 shi->v = 0.0f;
 745                         }
 746
 747                         if (shi->osatex) {
 748                                 shi->dx_u =  0.0f;
 749                                 shi->dx_v =  0.0f;
 750                                 shi->dy_u =  0.0f;
 751                                 shi->dy_v =  0.0f;
 752                         }
 753                 }
 754                 else {
 755                         /* most of this could become re-used for faces */
 756                         float detsh, t00, t10, t01, t11;
 757                         int axis1, axis2;
 758
 759                         /* find most stable axis to project */
 760                         axis_dominant_v3(&axis1, &axis2, shi->facenor);
 761
 762                         /* compute u,v and derivatives */
 763                         t00 = v3[axis1] - v1[axis1]; t01 = v3[axis2] - v1[axis2];
 764                         t10 = v3[axis1] - v2[axis1]; t11 = v3[axis2] - v2[axis2];
 765
 766                         detsh = (t00 * t11 - t10 * t01);
 767                         detsh = (detsh != 0.0f) ? 1.0f / detsh : 0.0f;
 768                         t00 *= detsh; t01 *= detsh;
 769                         t10 *= detsh; t11 *= detsh;
 770
 771                         shi->u = (shi->co[axis1] - v3[axis1]) * t11 - (shi->co[axis2] - v3[axis2]) * t10;
 772                         shi->v = (shi->co[axis2] - v3[axis2]) * t00 - (shi->co[axis1] - v3[axis1]) * t01;
 773                         if (shi->osatex) {
 774                                 shi->dx_u =  shi->dxco[axis1] * t11 - shi->dxco[axis2] * t10;
 775                                 shi->dx_v =  shi->dxco[axis2] * t00 - shi->dxco[axis1] * t01;
 776                                 shi->dy_u =  shi->dyco[axis1] * t11 - shi->dyco[axis2] * t10;
 777                                 shi->dy_v =  shi->dyco[axis2] * t00 - shi->dyco[axis1] * t01;
 778                         }
 779
 780                         /* u and v are in range -1 to 0, we allow a little bit extra but not too much, screws up speedvectors */
 781                         CLAMP(shi->u, -2.0f, 1.0f);
 782                         CLAMP(shi->v, -2.0f, 1.0f);
 783                 }
 784         }
 785 }
 786
 787 void shade_input_set_normals(ShadeInput *shi)
 788 {
 789         float u = shi->u, v = shi->v;
 790         float l = 1.0f + u + v;
 791
 792         shi->flippednor = 0;
 793
 794         /* test flip normals to viewing direction */
 795         if (!(shi->vlr->flag & R_TANGENT)) {
 796                 if (dot_v3v3(shi->facenor, shi->view) < 0.0f) {
 797                         negate_v3(shi->facenor);
 798                         shi->flippednor = 1;
 799                 }
 800         }
 801
 802         /* calculate vertexnormals */
 803         if (shi->vlr->flag & R_SMOOTH) {
 804                 float *n1 = shi->n1, *n2 = shi->n2, *n3 = shi->n3;
 805
 806                 if (shi->flippednor) {
 807                         negate_v3(n1);
 808                         negate_v3(n2);
 809                         negate_v3(n3);
 810                 }
 811
 812                 shi->vn[0] = l * n3[0] - u * n1[0] - v * n2[0];
 813                 shi->vn[1] = l * n3[1] - u * n1[1] - v * n2[1];
 814                 shi->vn[2] = l * n3[2] - u * n1[2] - v * n2[2];
 815
 816                 /* use unnormalized normal (closer to games) */
 817                 copy_v3_v3(shi->nmapnorm, shi->vn);
 818
 819                 normalize_v3(shi->vn);
 820         }
 821         else {
 822                 copy_v3_v3(shi->vn, shi->facenor);
 823                 copy_v3_v3(shi->nmapnorm, shi->vn);
 824         }
 825
 826         /* used in nodes */
 827         copy_v3_v3(shi->vno, shi->vn);
 828
 829         /* flip normals to viewing direction */
 830         if (!(shi->vlr->flag & R_TANGENT))
 831                 if (dot_v3v3(shi->facenor, shi->view) < 0.0f)
 832                         shade_input_flip_normals(shi);
 833 }
 834
 835 /* XXX shi->flippednor messes up otherwise */
 836 void shade_input_set_vertex_normals(ShadeInput *shi)
 837 {
 838         float u = shi->u, v = shi->v;
 839         float l = 1.0f + u + v;
 840
 841         /* calculate vertexnormals */
 842         if (shi->vlr->flag & R_SMOOTH) {
 843                 const float *n1 = shi->n1, *n2 = shi->n2, *n3 = shi->n3;
 844
 845                 shi->vn[0] = l * n3[0] - u * n1[0] - v * n2[0];
 846                 shi->vn[1] = l * n3[1] - u * n1[1] - v * n2[1];
 847                 shi->vn[2] = l * n3[2] - u * n1[2] - v * n2[2];
 848
 849                 /* use unnormalized normal (closer to games) */
 850                 copy_v3_v3(shi->nmapnorm, shi->vn);
 851
 852                 normalize_v3(shi->vn);
 853         }
 854         else {
 855                 copy_v3_v3(shi->vn, shi->facenor);
 856                 copy_v3_v3(shi->nmapnorm, shi->vn);
 857         }
 858
 859         /* used in nodes */
 860         copy_v3_v3(shi->vno, shi->vn);
 861 }
 862
 863
 864 /* use by raytrace, sss, bake to flip into the right direction */
 865 void shade_input_flip_normals(ShadeInput *shi)
 866 {
 867         negate_v3(shi->facenor);
 868         negate_v3(shi->vn);
 869         negate_v3(shi->vno);
 870         negate_v3(shi->nmapnorm);
 871         shi->flippednor = !shi->flippednor;
 872 }
 873
 874 void shade_input_set_shade_texco(ShadeInput *shi)
 875 {
 876         ObjectInstanceRen *obi = shi->obi;
 877         ObjectRen *obr = shi->obr;
 878         VertRen *v1 = shi->v1, *v2 = shi->v2, *v3 = shi->v3;
 879         float u = shi->u, v = shi->v;
 880         float l = 1.0f + u + v, dl;
 881         int mode = shi->mode;        /* or-ed result for all nodes */
 882         short texco = shi->mat->texco;
 883
 884         /* calculate dxno */
 885         if (shi->vlr->flag & R_SMOOTH) {
 886
 887                 if (shi->osatex && (texco & (TEXCO_NORM | TEXCO_REFL)) ) {
 888                         float *n1 = shi->n1, *n2 = shi->n2, *n3 = shi->n3;
 889
 890                         dl = shi->dx_u + shi->dx_v;
 891                         shi->dxno[0] = dl * n3[0] - shi->dx_u * n1[0] - shi->dx_v * n2[0];
 892                         shi->dxno[1] = dl * n3[1] - shi->dx_u * n1[1] - shi->dx_v * n2[1];
 893                         shi->dxno[2] = dl * n3[2] - shi->dx_u * n1[2] - shi->dx_v * n2[2];
 894                         dl = shi->dy_u + shi->dy_v;
 895                         shi->dyno[0] = dl * n3[0] - shi->dy_u * n1[0] - shi->dy_v * n2[0];
 896                         shi->dyno[1] = dl * n3[1] - shi->dy_u * n1[1] - shi->dy_v * n2[1];
 897                         shi->dyno[2] = dl * n3[2] - shi->dy_u * n1[2] - shi->dy_v * n2[2];
 898
 899                 }
 900         }
 901
 902         /* calc tangents */
 903         if (mode & (MA_TANGENT_V | MA_NORMAP_TANG) || R.flag & R_NEED_TANGENT) {
 904                 float *tangent, *s1, *s2, *s3;
 905                 float tl, tu, tv;
 906
 907                 if (shi->vlr->flag & R_SMOOTH) {
 908                         tl = l;
 909                         tu = u;
 910                         tv = v;
 911                 }
 912                 else {
 913                         /* qdn: flat faces have tangents too,
 914                          * could pick either one, using average here */
 915                         tl = 1.0f / 3.0f;
 916                         tu = -1.0f / 3.0f;
 917                         tv = -1.0f / 3.0f;
 918                 }
 919
 920                 shi->tang[0] = shi->tang[1] = shi->tang[2] = 0.0f;
 921                 shi->nmaptang[0] = shi->nmaptang[1] = shi->nmaptang[2] = 0.0f;
 922
 923                 if (mode & MA_TANGENT_V) {
 924                         s1 = RE_vertren_get_tangent(obr, v1, 0);
 925                         s2 = RE_vertren_get_tangent(obr, v2, 0);
 926                         s3 = RE_vertren_get_tangent(obr, v3, 0);
 927
 928                         if (s1 && s2 && s3) {
 929                                 shi->tang[0] = (tl * s3[0] - tu * s1[0] - tv * s2[0]);
 930                                 shi->tang[1] = (tl * s3[1] - tu * s1[1] - tv * s2[1]);
 931                                 shi->tang[2] = (tl * s3[2] - tu * s1[2] - tv * s2[2]);
 932
 933                                 if (obi->flag & R_TRANSFORMED)
 934                                         mul_m3_v3(obi->nmat, shi->tang);
 935
 936                                 normalize_v3(shi->tang);
 937                                 copy_v3_v3(shi->nmaptang, shi->tang);
 938                         }
 939                 }
 940
 941                 if (mode & MA_NORMAP_TANG || R.flag & R_NEED_TANGENT) {
 942                         tangent = RE_vlakren_get_nmap_tangent(obr, shi->vlr, 0);
 943
 944                         if (tangent) {
 945                                 int j1 = shi->i1, j2 = shi->i2, j3 = shi->i3;
 946                                 float c0[3], c1[3], c2[3];
 947
 948                                 vlr_set_uv_indices(shi->vlr, &j1, &j2, &j3);
 949
 950                                 copy_v3_v3(c0, &tangent[j1 * 4]);
 951                                 copy_v3_v3(c1, &tangent[j2 * 4]);
 952                                 copy_v3_v3(c2, &tangent[j3 * 4]);
 953
 954                                 /* keeping tangents normalized at vertex level
 955                                  * corresponds better to how it's done in game engines */
 956                                 if (obi->flag & R_TRANSFORMED) {
 957                                         mul_mat3_m4_v3(obi->mat, c0); normalize_v3(c0);
 958                                         mul_mat3_m4_v3(obi->mat, c1); normalize_v3(c1);
 959                                         mul_mat3_m4_v3(obi->mat, c2); normalize_v3(c2);
 960                                 }
 961
 962                                 /* we don't normalize the interpolated TBN tangent
 963                                  * corresponds better to how it's done in game engines */
 964                                 shi->nmaptang[0] = (tl * c2[0] - tu * c0[0] - tv * c1[0]);
 965                                 shi->nmaptang[1] = (tl * c2[1] - tu * c0[1] - tv * c1[1]);
 966                                 shi->nmaptang[2] = (tl * c2[2] - tu * c0[2] - tv * c1[2]);
 967
 968                                 /* the sign is the same for all 3 vertices of any
 969                                  * non degenerate triangle. */
 970                                 shi->nmaptang[3] = tangent[j1 * 4 + 3];
 971                         }
 972                 }
 973         }
 974
 975         if (mode & MA_STR_SURFDIFF) {
 976                 float *surfnor = RE_vlakren_get_surfnor(obr, shi->vlr, 0);
 977
 978                 if (surfnor) {
 979                         copy_v3_v3(shi->surfnor, surfnor);
 980                         if (obi->flag & R_TRANSFORMED)
 981                                 mul_m3_v3(obi->nmat, shi->surfnor);
 982                 }
 983                 else
 984                         copy_v3_v3(shi->surfnor, shi->vn);
 985
 986                 shi->surfdist = 0.0f;
 987         }
 988
 989         if (R.r.mode & R_SPEED) {
 990                 float *s1, *s2, *s3;
 991
 992                 s1 = RE_vertren_get_winspeed(obi, v1, 0);
 993                 s2 = RE_vertren_get_winspeed(obi, v2, 0);
 994                 s3 = RE_vertren_get_winspeed(obi, v3, 0);
 995                 if (s1 && s2 && s3) {
 996                         shi->winspeed[0] = (l * s3[0] - u * s1[0] - v * s2[0]);
 997                         shi->winspeed[1] = (l * s3[1] - u * s1[1] - v * s2[1]);
 998                         shi->winspeed[2] = (l * s3[2] - u * s1[2] - v * s2[2]);
 999                         shi->winspeed[3] = (l * s3[3] - u * s1[3] - v * s2[3]);
1000                 }
1001                 else {
1002                         shi->winspeed[0] = shi->winspeed[1] = shi->winspeed[2] = shi->winspeed[3] = 0.0f;
1003                 }
1004         }
1005
1006         /* pass option forces UV calc */
1007         if ((shi->passflag & SCE_PASS_UV) || (R.flag & R_NEED_VCOL))
1008                 texco |= (NEED_UV | TEXCO_UV);
1009
1010         /* texture coordinates. shi->dxuv shi->dyuv have been set */
1011         if (texco & NEED_UV) {
1012
1013                 if (texco & TEXCO_ORCO) {
1014                         if (v1->orco) {
1015                                 float *o1, *o2, *o3;
1016
1017                                 o1 = v1->orco;
1018                                 o2 = v2->orco;
1019                                 o3 = v3->orco;
1020
1021                                 shi->lo[0] = l * o3[0] - u * o1[0] - v * o2[0];
1022                                 shi->lo[1] = l * o3[1] - u * o1[1] - v * o2[1];
1023                                 shi->lo[2] = l * o3[2] - u * o1[2] - v * o2[2];
1024
1025                                 if (shi->osatex) {
1026                                         dl = shi->dx_u + shi->dx_v;
1027                                         shi->dxlo[0] = dl * o3[0] - shi->dx_u * o1[0] - shi->dx_v * o2[0];
1028                                         shi->dxlo[1] = dl * o3[1] - shi->dx_u * o1[1] - shi->dx_v * o2[1];
1029                                         shi->dxlo[2] = dl * o3[2] - shi->dx_u * o1[2] - shi->dx_v * o2[2];
1030                                         dl = shi->dy_u + shi->dy_v;
1031                                         shi->dylo[0] = dl * o3[0] - shi->dy_u * o1[0] - shi->dy_v * o2[0];
1032                                         shi->dylo[1] = dl * o3[1] - shi->dy_u * o1[1] - shi->dy_v * o2[1];
1033                                         shi->dylo[2] = dl * o3[2] - shi->dy_u * o1[2] - shi->dy_v * o2[2];
1034                                 }
1035                         }
1036
1037                         copy_v3_v3(shi->duplilo, obi->dupliorco);
1038                 }
1039
1040                 if (texco & TEXCO_GLOB) {
1041                         copy_v3_v3(shi->gl, shi->co);
1042                         mul_m4_v3(R.viewinv, shi->gl);
1043                         if (shi->osatex) {
1044                                 copy_v3_v3(shi->dxgl, shi->dxco);
1045                                 mul_mat3_m4_v3(R.viewinv, shi->dxgl);
1046                                 copy_v3_v3(shi->dygl, shi->dyco);
1047                                 mul_mat3_m4_v3(R.viewinv, shi->dygl);
1048                         }
1049                 }
1050
1051                 if (texco & TEXCO_STRAND) {
1052                         shi->strandco = (l * v3->accum - u * v1->accum - v * v2->accum);
1053                         if (shi->osatex) {
1054                                 dl = shi->dx_u + shi->dx_v;
1055                                 shi->dxstrand = dl * v3->accum - shi->dx_u * v1->accum - shi->dx_v * v2->accum;
1056                                 dl = shi->dy_u + shi->dy_v;
1057                                 shi->dystrand = dl * v3->accum - shi->dy_u * v1->accum - shi->dy_v * v2->accum;
1058                         }
1059                 }
1060
1061                 if ((texco & TEXCO_UV) || (mode & (MA_VERTEXCOL | MA_VERTEXCOLP | MA_FACETEXTURE)) || (R.flag & R_NEED_VCOL)) {
1062                         VlakRen *vlr = shi->vlr;
1063                         MTFace *tface;
1064                         MCol *mcol;
1065                         char *name;
1066                         int i, j1 = shi->i1, j2 = shi->i2, j3 = shi->i3;
1067
1068                         /* uv and vcols are not copied on split, so set them according vlr divide flag */
1069                         vlr_set_uv_indices(vlr, &j1, &j2, &j3);
1070
1071                         shi->totuv = 0;
1072                         shi->totcol = 0;
1073                         shi->actuv = obr->actmtface;
1074                         shi->actcol = obr->actmcol;
1075
1076                         if ((mode & (MA_VERTEXCOL | MA_VERTEXCOLP)) || (R.flag & R_NEED_VCOL)) {
1077                                 for (i = 0; (mcol = RE_vlakren_get_mcol(obr, vlr, i, &name, 0)); i++) {
1078                                         ShadeInputCol *scol = &shi->col[i];
1079                                         char *cp1, *cp2, *cp3;
1080                                         float a[3];
1081
1082                                         shi->totcol++;
1083                                         scol->name = name;
1084
1085                                         cp1 = (char *)(mcol + j1);
1086                                         cp2 = (char *)(mcol + j2);
1087                                         cp3 = (char *)(mcol + j3);
1088
1089                                         /* alpha values */
1090                                         a[0] = ((float)cp1[0]) / 255.f;
1091                                         a[1] = ((float)cp2[0]) / 255.f;
1092                                         a[2] = ((float)cp3[0]) / 255.f;
1093                                         scol->col[3] = l * a[2] - u * a[0] - v * a[1];
1094
1095                                         /* sample premultiplied color value */
1096                                         scol->col[0] = (l * ((float)cp3[3]) * a[2] - u * ((float)cp1[3]) * a[0] - v * ((float)cp2[3]) * a[1]) / 255.f;
1097                                         scol->col[1] = (l * ((float)cp3[2]) * a[2] - u * ((float)cp1[2]) * a[0] - v * ((float)cp2[2]) * a[1]) / 255.f;
1098                                         scol->col[2] = (l * ((float)cp3[1]) * a[2] - u * ((float)cp1[1]) * a[0] - v * ((float)cp2[1]) * a[1]) / 255.f;
1099
1100                                         /* if not zero alpha, restore non-multiplied color */
1101                                         if (scol->col[3]) {
1102                                                 mul_v3_fl(scol->col, 1.0f / scol->col[3]);
1103                                         }
1104                                 }
1105
1106                                 if (shi->totcol) {
1107                                         shi->vcol[0] = shi->col[shi->actcol].col[0];
1108                                         shi->vcol[1] = shi->col[shi->actcol].col[1];
1109                                         shi->vcol[2] = shi->col[shi->actcol].col[2];
1110                                         shi->vcol[3] = shi->col[shi->actcol].col[3];
1111                                 }
1112                                 else {
1113                                         shi->vcol[0] = 0.0f;
1114                                         shi->vcol[1] = 0.0f;
1115                                         shi->vcol[2] = 0.0f;
1116                                         shi->vcol[3] = 1.0f;
1117                                 }
1118                         }
1119
1120                         for (i = 0; (tface = RE_vlakren_get_tface(obr, vlr, i, &name, 0)); i++) {
1121                                 ShadeInputUV *suv = &shi->uv[i];
1122                                 const float *uv1 = tface->uv[j1];
1123                                 const float *uv2 = tface->uv[j2];
1124                                 const float *uv3 = tface->uv[j3];
1125
1126                                 shi->totuv++;
1127                                 suv->name = name;
1128
1129                                 if ((shi->mat->mapflag & MA_MAPFLAG_UVPROJECT) && (shi->depth == 0)) {
1130                                         float x = shi->xs;
1131                                         float y = shi->ys;
1132
1133                                         float s1[2] = {-1.0f + 2.0f * uv1[0], -1.0f + 2.0f * uv1[1]};
1134                                         float s2[2] = {-1.0f + 2.0f * uv2[0], -1.0f + 2.0f * uv2[1]};
1135                                         float s3[2] = {-1.0f + 2.0f * uv3[0], -1.0f + 2.0f * uv3[1]};
1136
1137
1138                                         float obwinmat[4][4], winmat[4][4], ho1[4], ho2[4], ho3[4];
1139                                         float Zmulx, Zmuly;
1140                                         float hox, hoy, l, dl, u, v;
1141                                         float s00, s01, s10, s11, detsh;
1142
1143                                         /* old globals, localized now */
1144                                         Zmulx =  ((float)R.winx) / 2.0f;
1145                                         Zmuly =  ((float)R.winy) / 2.0f;
1146
1147                                         zbuf_make_winmat(&R, winmat);
1148                                         if (shi->obi->flag & R_TRANSFORMED)
1149                                                 mul_m4_m4m4(obwinmat, winmat, obi->mat);
1150                                         else
1151                                                 copy_m4_m4(obwinmat, winmat);
1152
1153                                         zbuf_render_project(obwinmat, v1->co, ho1);
1154                                         zbuf_render_project(obwinmat, v2->co, ho2);
1155                                         zbuf_render_project(obwinmat, v3->co, ho3);
1156
1157                                         s00 = ho3[0] / ho3[3] - ho1[0] / ho1[3];
1158                                         s01 = ho3[1] / ho3[3] - ho1[1] / ho1[3];
1159                                         s10 = ho3[0] / ho3[3] - ho2[0] / ho2[3];
1160                                         s11 = ho3[1] / ho3[3] - ho2[1] / ho2[3];
1161
1162                                         detsh = s00 * s11 - s10 * s01;
1163                                         detsh = (detsh != 0.0f) ? 1.0f / detsh : 0.0f;
1164                                         s00 *= detsh; s01 *= detsh;
1165                                         s10 *= detsh; s11 *= detsh;
1166
1167                                         /* recalc u and v again */
1168                                         hox = x / Zmulx - 1.0f;
1169                                         hoy = y / Zmuly - 1.0f;
1170                                         u = (hox - ho3[0] / ho3[3]) * s11 - (hoy - ho3[1] / ho3[3]) * s10;
1171                                         v = (hoy - ho3[1] / ho3[3]) * s00 - (hox - ho3[0] / ho3[3]) * s01;
1172                                         l = 1.0f + u + v;
1173
1174                                         suv->uv[0] = l * s3[0] - u * s1[0] - v * s2[0];
1175                                         suv->uv[1] = l * s3[1] - u * s1[1] - v * s2[1];
1176                                         suv->uv[2] = 0.0f;
1177
1178                                         if (shi->osatex) {
1179                                                 float dxuv[2], dyuv[2];
1180                                                 dxuv[0] =  s11 / Zmulx;
1181                                                 dxuv[1] =  -s01 / Zmulx;
1182                                                 dyuv[0] =  -s10 / Zmuly;
1183                                                 dyuv[1] =  s00 / Zmuly;
1184
1185                                                 dl = dxuv[0] + dxuv[1];
1186                                                 suv->dxuv[0] = dl * s3[0] - dxuv[0] * s1[0] - dxuv[1] * s2[0];
1187                                                 suv->dxuv[1] = dl * s3[1] - dxuv[0] * s1[1] - dxuv[1] * s2[1];
1188                                                 dl = dyuv[0] + dyuv[1];
1189                                                 suv->dyuv[0] = dl * s3[0] - dyuv[0] * s1[0] - dyuv[1] * s2[0];
1190                                                 suv->dyuv[1] = dl * s3[1] - dyuv[0] * s1[1] - dyuv[1] * s2[1];
1191                                         }
1192                                 }
1193                                 else {
1194
1195                                         suv->uv[0] = -1.0f + 2.0f * (l * uv3[0] - u * uv1[0] - v * uv2[0]);
1196                                         suv->uv[1] = -1.0f + 2.0f * (l * uv3[1] - u * uv1[1] - v * uv2[1]);
1197                                         suv->uv[2] = 0.0f;   /* texture.c assumes there are 3 coords */
1198
1199                                         if (shi->osatex) {
1200                                                 float duv[2];
1201
1202                                                 dl = shi->dx_u + shi->dx_v;
1203                                                 duv[0] = shi->dx_u;
1204                                                 duv[1] = shi->dx_v;
1205
1206                                                 suv->dxuv[0] = 2.0f * (dl * uv3[0] - duv[0] * uv1[0] - duv[1] * uv2[0]);
1207                                                 suv->dxuv[1] = 2.0f * (dl * uv3[1] - duv[0] * uv1[1] - duv[1] * uv2[1]);
1208
1209                                                 dl = shi->dy_u + shi->dy_v;
1210                                                 duv[0] = shi->dy_u;
1211                                                 duv[1] = shi->dy_v;
1212
1213                                                 suv->dyuv[0] = 2.0f * (dl * uv3[0] - duv[0] * uv1[0] - duv[1] * uv2[0]);
1214                                                 suv->dyuv[1] = 2.0f * (dl * uv3[1] - duv[0] * uv1[1] - duv[1] * uv2[1]);
1215                                         }
1216
1217                                         if ((mode & MA_FACETEXTURE) && i == obr->actmtface) {
1218                                                 if (((mode & (MA_VERTEXCOL | MA_VERTEXCOLP)) == 0) && ((R.flag & R_NEED_VCOL) == 0)) {
1219                                                         shi->vcol[0] = 1.0f;
1220                                                         shi->vcol[1] = 1.0f;
1221                                                         shi->vcol[2] = 1.0f;
1222                                                         shi->vcol[3] = 1.0f;
1223                                                 }
1224                                                 if (tface->tpage) {
1225                                                         render_realtime_texture(shi, tface->tpage);
1226                                                 }
1227                                         }
1228                                 }
1229                         }
1230
1231                         shi->dupliuv[0] = -1.0f + 2.0f * obi->dupliuv[0];
1232                         shi->dupliuv[1] = -1.0f + 2.0f * obi->dupliuv[1];
1233                         shi->dupliuv[2] = 0.0f;
1234
1235                         if (shi->totuv == 0) {
1236                                 ShadeInputUV *suv = &shi->uv[0];
1237
1238                                 suv->uv[0] = 2.0f * (u + .5f);
1239                                 suv->uv[1] = 2.0f * (v + .5f);
1240                                 suv->uv[2] = 0.0f;   /* texture.c assumes there are 3 coords */
1241
1242                                 if (mode & MA_FACETEXTURE) {
1243                                         /* no tface? set at 1.0f */
1244                                         shi->vcol[0] = 1.0f;
1245                                         shi->vcol[1] = 1.0f;
1246                                         shi->vcol[2] = 1.0f;
1247                                         shi->vcol[3] = 1.0f;
1248                                 }
1249                         }
1250                 }
1251
1252                 if (texco & TEXCO_NORM) {
1253                         shi->orn[0] = -shi->vn[0];
1254                         shi->orn[1] = -shi->vn[1];
1255                         shi->orn[2] = -shi->vn[2];
1256                 }
1257
1258                 if (texco & TEXCO_STRESS) {
1259                         float *s1, *s2, *s3;
1260
1261                         s1 = RE_vertren_get_stress(obr, v1, 0);
1262                         s2 = RE_vertren_get_stress(obr, v2, 0);
1263                         s3 = RE_vertren_get_stress(obr, v3, 0);
1264                         if (s1 && s2 && s3) {
1265                                 shi->stress = l * s3[0] - u * s1[0] - v * s2[0];
1266                                 if (shi->stress < 1.0f) shi->stress -= 1.0f;
1267                                 else shi->stress = (shi->stress - 1.0f) / shi->stress;
1268                         }
1269                         else shi->stress = 0.0f;
1270                 }
1271
1272                 if (texco & TEXCO_TANGENT) {
1273                         if ((mode & MA_TANGENT_V) == 0) {
1274                                 /* just prevent surprises */
1275                                 shi->tang[0] = shi->tang[1] = shi->tang[2] = 0.0f;
1276                                 shi->nmaptang[0] = shi->nmaptang[1] = shi->nmaptang[2] = 0.0f;
1277                         }
1278                 }
1279         }
1280
1281         /* this only avalailable for scanline renders */
1282         if (shi->depth == 0) {
1283                 float x = shi->xs;
1284                 float y = shi->ys;
1285
1286                 if (texco & TEXCO_WINDOW) {
1287                         shi->winco[0] = -1.0f + 2.0f * x / (float)R.winx;
1288                         shi->winco[1] = -1.0f + 2.0f * y / (float)R.winy;
1289                         shi->winco[2] = 0.0f;
1290                         if (shi->osatex) {
1291                                 shi->dxwin[0] = 2.0f / (float)R.winx;
1292                                 shi->dywin[1] = 2.0f / (float)R.winy;
1293                                 shi->dxwin[1] = shi->dxwin[2] = 0.0f;
1294                                 shi->dywin[0] = shi->dywin[2] = 0.0f;
1295                         }
1296                 }
1297         }
1298         /* else {
1299          * Note! For raytracing winco is not set,
1300          * important because thus means all shader input's need to have their variables set to zero
1301          * else un-initialized values are used
1302          */
1303         if (shi->do_manage) {
1304                 if ((mode & (MA_VERTEXCOL | MA_VERTEXCOLP | MA_FACETEXTURE)) || (R.flag & R_NEED_VCOL)) {
1305                         srgb_to_linearrgb_v3_v3(shi->vcol, shi->vcol);
1306                 }
1307         }
1308
1309 }
1310
1311 /* ****************** ShadeSample ************************************** */
1312
1313 /* initialize per part, not per pixel! */
1314 void shade_input_initialize(ShadeInput *shi, RenderPart *pa, RenderLayer *rl, int sample)
1315 {
1316
1317         memset(shi, 0, sizeof(ShadeInput));
1318
1319         shi->sample = sample;
1320         shi->thread = pa->thread;
1321         shi->do_preview = (R.r.scemode & R_MATNODE_PREVIEW) != 0;
1322
1323         shi->do_manage = BKE_scene_check_color_management_enabled(R.scene);
1324
1325         shi->lay = rl->lay;
1326         shi->layflag = rl->layflag;
1327         shi->passflag = rl->passflag;
1328         shi->combinedflag = ~rl->pass_xor;
1329         shi->mat_override = rl->mat_override;
1330         shi->light_override = rl->light_override;
1331 //      shi->rl= rl;
1332         /* note shi.depth==0  means first hit, not raytracing */
1333
1334 }
1335
1336 /* initialize per part, not per pixel! */
1337 void shade_sample_initialize(ShadeSample *ssamp, RenderPart *pa, RenderLayer *rl)
1338 {
1339         int a, tot;
1340
1341         tot = R.osa == 0 ? 1 : R.osa;
1342
1343         for (a = 0; a < tot; a++) {
1344                 shade_input_initialize(&ssamp->shi[a], pa, rl, a);
1345                 memset(&ssamp->shr[a], 0, sizeof(ShadeResult));
1346         }
1347
1348         get_sample_layers(pa, rl, ssamp->rlpp);
1349 }
1350
1351 /* Do AO or (future) GI */
1352 void shade_samples_do_AO(ShadeSample *ssamp)
1353 {
1354         if (!(R.r.mode & R_SHADOW))
1355                 return;
1356         if (!(R.r.mode & R_RAYTRACE) && !(R.wrld.ao_gather_method == WO_AOGATHER_APPROX))
1357                 return;
1358
1359         if (R.wrld.mode & (WO_AMB_OCC | WO_ENV_LIGHT | WO_INDIRECT_LIGHT)) {
1360                 ShadeInput *shi = &ssamp->shi[0];
1361                 int sample;
1362
1363                 if (((shi->passflag & SCE_PASS_COMBINED) && (shi->combinedflag & (SCE_PASS_AO | SCE_PASS_ENVIRONMENT | SCE_PASS_INDIRECT))) ||
1364                     (shi->passflag & (SCE_PASS_AO | SCE_PASS_ENVIRONMENT | SCE_PASS_INDIRECT)))
1365                 {
1366                         for (sample = 0; sample < ssamp->tot; shi++, sample++)
1367                                 if (!(shi->mode & MA_SHLESS))
1368                                         ambient_occlusion(shi);     /* stores in shi->ao[] */
1369                 }
1370         }
1371 }
1372
1373
1374 void shade_samples_fill_with_ps(ShadeSample *ssamp, PixStr *ps, int x, int y)
1375 {
1376         ShadeInput *shi;
1377         float xs, ys;
1378
1379         ssamp->tot = 0;
1380
1381         for (shi = ssamp->shi; ps; ps = ps->next) {
1382                 shade_input_set_triangle(shi, ps->obi, ps->facenr, 1);
1383
1384                 if (shi->vlr) { /* NULL happens for env material or for 'all z' */
1385                         unsigned short curmask = ps->mask;
1386
1387                         /* full osa is only set for OSA renders */
1388                         if (shi->vlr->flag & R_FULL_OSA) {
1389                                 short shi_cp = 0, samp;
1390
1391                                 for (samp = 0; samp < R.osa; samp++) {
1392                                         if (curmask & (1 << samp)) {
1393                                                 /* zbuffer has this inverse corrected, ensures xs,ys are inside pixel */
1394                                                 xs = (float)x + R.jit[samp][0] + 0.5f;
1395                                                 ys = (float)y + R.jit[samp][1] + 0.5f;
1396
1397                                                 if (shi_cp)
1398                                                         shade_input_copy_triangle(shi, shi - 1);
1399
1400                                                 shi->mask = (1 << samp);
1401 //                                              shi->rl= ssamp->rlpp[samp];
1402                                                 shi->samplenr = R.shadowsamplenr[shi->thread]++; /* this counter is not being reset per pixel */
1403                                                 shade_input_set_viewco(shi, x, y, xs, ys, (float)ps->z);
1404                                                 shade_input_set_uv(shi);
1405                                                 if (shi_cp == 0)
1406                                                         shade_input_set_normals(shi);
1407                                                 else  /* XXX shi->flippednor messes up otherwise */
1408                                                         shade_input_set_vertex_normals(shi);
1409
1410                                                 shi_cp = 1;
1411                                                 shi++;
1412                                         }
1413                                 }
1414                         }
1415                         else {
1416                                 if (R.osa) {
1417                                         short b = R.samples->centmask[curmask];
1418                                         xs = (float)x + R.samples->centLut[b & 15] + 0.5f;
1419                                         ys = (float)y + R.samples->centLut[b >> 4] + 0.5f;
1420                                 }
1421                                 else if (R.i.curblur) {
1422                                         xs= (float)x + R.mblur_jit[R.i.curblur-1][0] + 0.5f;
1423                                         ys= (float)y + R.mblur_jit[R.i.curblur-1][1] + 0.5f;
1424                                 }
1425                                 else {
1426                                         xs = (float)x + 0.5f;
1427                                         ys = (float)y + 0.5f;
1428                                 }
1429
1430                                 shi->mask = curmask;
1431                                 shi->samplenr = R.shadowsamplenr[shi->thread]++;
1432                                 shade_input_set_viewco(shi, x, y, xs, ys, (float)ps->z);
1433                                 shade_input_set_uv(shi);
1434                                 shade_input_set_normals(shi);
1435                                 shi++;
1436                         }
1437
1438                         /* total sample amount, shi->sample is static set in initialize */
1439                         if (shi != ssamp->shi)
1440                                 ssamp->tot = (shi - 1)->sample + 1;
1441                 }
1442         }
1443 }
1444
1445 /* shades samples, returns true if anything happened */
1446 int shade_samples(ShadeSample *ssamp, PixStr *ps, int x, int y)
1447 {
1448         shade_samples_fill_with_ps(ssamp, ps, x, y);
1449
1450         if (ssamp->tot) {
1451                 ShadeInput *shi = ssamp->shi;
1452                 ShadeResult *shr = ssamp->shr;
1453                 int samp;
1454
1455                 /* if shadow or AO? */
1456                 shade_samples_do_AO(ssamp);
1457
1458                 /* if shade (all shadepinputs have same passflag) */
1459                 if (ssamp->shi[0].passflag & ~(SCE_PASS_Z | SCE_PASS_INDEXOB | SCE_PASS_INDEXMA)) {
1460
1461                         for (samp = 0; samp < ssamp->tot; samp++, shi++, shr++) {
1462                                 shade_input_set_shade_texco(shi);
1463                                 shade_input_do_shade(shi, shr);
1464                         }
1465                 }
1466                 else if (shi->passflag & SCE_PASS_Z) {
1467                         for (samp = 0; samp < ssamp->tot; samp++, shi++, shr++)
1468                                 shr->z = -shi->co[2];
1469                 }
1470
1471                 return 1;
1472         }
1473         return 0;
1474 }
1475