source/blender/render/intern/source/shadeinput.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) 2006 Blender Foundation
  21  * All rights reserved.
  22  *
  23  * Contributors: Hos, Robert Wenzlaff.
  24  *
  25  * ***** END GPL LICENSE BLOCK *****
  26  */
  27
  28 #include <stdio.h>
  29 #include <math.h>
  30 #include <string.h>
  31
  32 #include "MTC_matrixops.h"
  33 #include "BLI_arithb.h"
  34 #include "BLI_blenlib.h"
  35
  36 #include "DNA_curve_types.h"
  37 #include "DNA_group_types.h"
  38 #include "DNA_lamp_types.h"
  39 #include "DNA_meshdata_types.h"
  40 #include "DNA_material_types.h"
  41
  42 #include "BKE_utildefines.h"
  43 #include "BKE_node.h"
  44
  45 /* local include */
  46 #include "renderpipeline.h"
  47 #include "render_types.h"
  48 #include "renderdatabase.h"
  49 #include "rendercore.h"
  50 #include "shadbuf.h"
  51 #include "shading.h"
  52 #include "strand.h"
  53 #include "texture.h"
  54 #include "zbuf.h"
  55
  56 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
  57 /* defined in pipeline.c, is hardcopy of active dynamic allocated Render */
  58 /* only to be used here in this file, it's for speed */
  59 extern struct Render R;
  60 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
  61
  62
  63 #define VECADDISFAC(v1,v3,fac) {*(v1)+= *(v3)*(fac); *(v1+1)+= *(v3+1)*(fac); *(v1+2)+= *(v3+2)*(fac);}
  64
  65
  66
  67 /* Shade Sample order:
  68
  69 - shade_samples_fill_with_ps()
  70         - for each sample
  71                 - shade_input_set_triangle()  <- if prev sample-face is same, use shade_input_copy_triangle()
  72                 - if vlr
  73                         - shade_input_set_viewco()    <- not for ray or bake
  74                         - shade_input_set_uv()        <- not for ray or bake
  75                         - shade_input_set_normals()
  76 - shade_samples()
  77         - if AO
  78                 - shade_samples_do_AO()
  79         - if shading happens
  80                 - for each sample
  81                         - shade_input_set_shade_texco()
  82                         - shade_samples_do_shade()
  83 - OSA: distribute sample result with filter masking
  84
  85         */
  86
  87
  88 /* also used as callback for nodes */
  89 /* delivers a fully filled in ShadeResult, for all passes */
  90 void shade_material_loop(ShadeInput *shi, ShadeResult *shr)
  91 {
  92
  93         shade_lamp_loop(shi, shr);      /* clears shr */
  94
  95         if(shi->translucency!=0.0f) {
  96                 ShadeResult shr_t;
  97                 float fac= shi->translucency;
  98
  99                 /* gotta copy it again */
 100                 memcpy(&shi->r, &shi->mat->r, 23*sizeof(float));
 101                 shi->har= shi->mat->har;
 102
 103                 VECCOPY(shi->vn, shi->vno);
 104                 VECMUL(shi->vn, -1.0f);
 105                 VECMUL(shi->facenor, -1.0f);
 106                 shi->depth++;   /* hack to get real shadow now */
 107                 shade_lamp_loop(shi, &shr_t);
 108                 shi->depth--;
 109
 110                 /* a couple of passes */
 111                 VECADDISFAC(shr->combined, shr_t.combined, fac);
 112                 if(shi->passflag & SCE_PASS_SPEC)
 113                         VECADDISFAC(shr->spec, shr_t.spec, fac);
 114                 if(shi->passflag & SCE_PASS_DIFFUSE)
 115                         VECADDISFAC(shr->diff, shr_t.diff, fac);
 116                 if(shi->passflag & SCE_PASS_SHADOW)
 117                         VECADDISFAC(shr->shad, shr_t.shad, fac);
 118
 119                 VECMUL(shi->vn, -1.0f);
 120                 VECMUL(shi->facenor, -1.0f);
 121         }
 122
 123         /* depth >= 1 when ray-shading */
 124         if(shi->depth==0) {
 125                 if(R.r.mode & R_RAYTRACE) {
 126                         if(shi->ray_mirror!=0.0f || ((shi->mat->mode & MA_RAYTRANSP) && shr->alpha!=1.0f)) {
 127                                 /* ray trace works on combined, but gives pass info */
 128                                 ray_trace(shi, shr);
 129                         }
 130                 }
 131                 /* disable adding of sky for raytransp */
 132                 if(shi->mat->mode & MA_RAYTRANSP)
 133                         if((shi->layflag & SCE_LAY_SKY) && (R.r.alphamode==R_ADDSKY))
 134                                 shr->alpha= 1.0f;
 135         }
 136 }
 137
 138 /* delivers a fully filled in ShadeResult, for all passes */
 139 void shade_volume_loop(ShadeInput *shi, ShadeResult *shr)
 140 {
 141         if(R.r.mode & R_RAYTRACE) volume_trace(shi, shr);
 142 }
 143
 144
 145 /* do a shade, finish up some passes, apply mist */
 146 void shade_input_do_shade(ShadeInput *shi, ShadeResult *shr)
 147 {
 148         float alpha;
 149
 150         /* ------  main shading loop -------- */
 151
 152         if(shi->mat->nodetree && shi->mat->use_nodes) {
 153                 ntreeShaderExecTree(shi->mat->nodetree, shi, shr);
 154         }
 155         else {
 156                 /* copy all relevant material vars, note, keep this synced with render_types.h */
 157                 memcpy(&shi->r, &shi->mat->r, 23*sizeof(float));
 158                 shi->har= shi->mat->har;
 159
 160                 if (shi->mat->material_type == MA_SOLID) shade_material_loop(shi, shr);
 161                 else if (shi->mat->material_type == MA_VOLUME) shade_volume_loop(shi, shr);
 162         }
 163
 164         /* copy additional passes */
 165         if(shi->passflag & (SCE_PASS_VECTOR|SCE_PASS_NORMAL|SCE_PASS_RADIO)) {
 166                 QUATCOPY(shr->winspeed, shi->winspeed);
 167                 VECCOPY(shr->nor, shi->vn);
 168                 VECCOPY(shr->rad, shi->rad);
 169         }
 170
 171         /* MIST */
 172         if((shi->passflag & SCE_PASS_MIST) || ((R.wrld.mode & WO_MIST) && (shi->mat->mode & MA_NOMIST)==0))  {
 173                 if(R.r.mode & R_ORTHO)
 174                         shr->mist= mistfactor(-shi->co[2], shi->co);
 175                 else
 176                         shr->mist= mistfactor(VecLength(shi->co), shi->co);
 177         }
 178         else shr->mist= 0.0f;
 179
 180         if((R.wrld.mode & WO_MIST) && (shi->mat->mode & MA_NOMIST)==0 ) {
 181                 alpha= shr->mist;
 182         }
 183         else alpha= 1.0f;
 184
 185         /* add mist and premul color */
 186         if(shr->alpha!=1.0f || alpha!=1.0f) {
 187                 float fac= alpha*(shr->alpha);
 188
 189                 shr->combined[3]= fac;
 190                 shr->combined[0]*= fac;
 191                 shr->combined[1]*= fac;
 192                 shr->combined[2]*= fac;
 193         }
 194         else shr->combined[3]= 1.0f;
 195
 196         /* add z */
 197         shr->z= -shi->co[2];
 198 }
 199
 200 /* **************************************************************************** */
 201 /*                    ShadeInput                                                */
 202 /* **************************************************************************** */
 203
 204
 205 void vlr_set_uv_indices(VlakRen *vlr, int *i1, int *i2, int *i3)
 206 {
 207         /* to prevent storing new tfaces or vcols, we check a split runtime */
 208         /*              4---3           4---3 */
 209         /*              |\ 1|   or  |1 /| */
 210         /*              |0\ |           |/ 0| */
 211         /*              1---2           1---2   0 = orig face, 1 = new face */
 212
 213         /* Update vert nums to point to correct verts of original face */
 214         if(vlr->flag & R_DIVIDE_24) {
 215                 if(vlr->flag & R_FACE_SPLIT) {
 216                         (*i1)++; (*i2)++; (*i3)++;
 217                 }
 218                 else {
 219                         (*i3)++;
 220                 }
 221         }
 222         else if(vlr->flag & R_FACE_SPLIT) {
 223                 (*i2)++; (*i3)++;
 224         }
 225 }
 226
 227 /* copy data from face to ShadeInput, general case */
 228 /* indices 0 1 2 3 only */
 229 void shade_input_set_triangle_i(ShadeInput *shi, ObjectInstanceRen *obi, VlakRen *vlr, short i1, short i2, short i3)
 230 {
 231         VertRen **vpp= &vlr->v1;
 232
 233         shi->vlr= vlr;
 234         shi->obi= obi;
 235         shi->obr= obi->obr;
 236
 237         shi->v1= vpp[i1];
 238         shi->v2= vpp[i2];
 239         shi->v3= vpp[i3];
 240
 241         shi->i1= i1;
 242         shi->i2= i2;
 243         shi->i3= i3;
 244
 245         /* note, shi->mat is set in node shaders */
 246         shi->mat= shi->mat_override?shi->mat_override:vlr->mat;
 247
 248         shi->osatex= (shi->mat->texco & TEXCO_OSA);
 249         shi->mode= shi->mat->mode_l;            /* or-ed result for all nodes */
 250
 251         /* facenormal copy, can get flipped */
 252         shi->flippednor= RE_vlakren_get_normal(&R, obi, vlr, shi->facenor);
 253
 254         /* copy of original pre-flipped normal, for geometry->front/back node output */
 255         VECCOPY(shi->orignor, shi->facenor);
 256         if(shi->flippednor)
 257                 VECMUL(shi->orignor, -1.0f);
 258
 259         /* calculate vertexnormals */
 260         if(vlr->flag & R_SMOOTH) {
 261                 VECCOPY(shi->n1, shi->v1->n);
 262                 VECCOPY(shi->n2, shi->v2->n);
 263                 VECCOPY(shi->n3, shi->v3->n);
 264
 265                 if(obi->flag & R_TRANSFORMED) {
 266                         Mat3MulVecfl(obi->nmat, shi->n1);
 267                         Mat3MulVecfl(obi->nmat, shi->n2);
 268                         Mat3MulVecfl(obi->nmat, shi->n3);
 269                 }
 270
 271                 if(!(vlr->flag & (R_NOPUNOFLIP|R_TANGENT))) {
 272                         if(INPR(shi->facenor, shi->n1) < 0.0f) {
 273                                 shi->n1[0]= -shi->n1[0];
 274                                 shi->n1[1]= -shi->n1[1];
 275                                 shi->n1[2]= -shi->n1[2];
 276                         }
 277                         if(INPR(shi->facenor, shi->n2) < 0.0f) {
 278                                 shi->n2[0]= -shi->n2[0];
 279                                 shi->n2[1]= -shi->n2[1];
 280                                 shi->n2[2]= -shi->n2[2];
 281                         }
 282                         if(INPR(shi->facenor, shi->n3) < 0.0f) {
 283                                 shi->n3[0]= -shi->n3[0];
 284                                 shi->n3[1]= -shi->n3[1];
 285                                 shi->n3[2]= -shi->n3[2];
 286                         }
 287                 }
 288         }
 289 }
 290
 291 /* note, facenr declared volatile due to over-eager -O2 optimizations
 292  * on cygwin (particularly -frerun-cse-after-loop)
 293  */
 294
 295 /* copy data from face to ShadeInput, scanline case */
 296 void shade_input_set_triangle(ShadeInput *shi, volatile int obi, volatile int facenr, int normal_flip)
 297 {
 298         if(facenr>0) {
 299                 shi->obi= &R.objectinstance[obi];
 300                 shi->obr= shi->obi->obr;
 301                 shi->facenr= (facenr-1) & RE_QUAD_MASK;
 302                 if( shi->facenr < shi->obr->totvlak ) {
 303                         VlakRen *vlr= RE_findOrAddVlak(shi->obr, shi->facenr);
 304
 305                         if(facenr & RE_QUAD_OFFS)
 306                                 shade_input_set_triangle_i(shi, shi->obi, vlr, 0, 2, 3);
 307                         else
 308                                 shade_input_set_triangle_i(shi, shi->obi, vlr, 0, 1, 2);
 309                 }
 310                 else
 311                         shi->vlr= NULL; /* general signal we got sky */
 312         }
 313         else
 314                 shi->vlr= NULL; /* general signal we got sky */
 315 }
 316
 317 /* full osa case: copy static info */
 318 void shade_input_copy_triangle(ShadeInput *shi, ShadeInput *from)
 319 {
 320         /* not so nice, but works... warning is in RE_shader_ext.h */
 321         memcpy(shi, from, sizeof(struct ShadeInputCopy));
 322 }
 323
 324 /* copy data from strand to shadeinput */
 325 void shade_input_set_strand(ShadeInput *shi, StrandRen *strand, StrandPoint *spoint)
 326 {
 327         /* note, shi->mat is set in node shaders */
 328         shi->mat= shi->mat_override? shi->mat_override: strand->buffer->ma;
 329
 330         shi->osatex= (shi->mat->texco & TEXCO_OSA);
 331         shi->mode= shi->mat->mode_l;            /* or-ed result for all nodes */
 332
 333         /* shade_input_set_viewco equivalent */
 334         VECCOPY(shi->co, spoint->co);
 335         VECCOPY(shi->view, shi->co);
 336         Normalize(shi->view);
 337
 338         shi->xs= (int)spoint->x;
 339         shi->ys= (int)spoint->y;
 340
 341         if(shi->osatex || (R.r.mode & R_SHADOW)) {
 342                 VECCOPY(shi->dxco, spoint->dtco);
 343                 VECCOPY(shi->dyco, spoint->dsco);
 344         }
 345
 346         /* dxview, dyview, not supported */
 347
 348         /* facenormal, simply viewco flipped */
 349         VECCOPY(shi->facenor, spoint->nor);
 350         VECCOPY(shi->orignor, shi->facenor);
 351
 352         /* shade_input_set_normals equivalent */
 353         if(shi->mat->mode & MA_TANGENT_STR) {
 354                 VECCOPY(shi->vn, spoint->tan)
 355         }
 356         else {
 357                 float cross[3];
 358
 359                 Crossf(cross, spoint->co, spoint->tan);
 360                 Crossf(shi->vn, cross, spoint->tan);
 361                 Normalize(shi->vn);
 362
 363                 if(INPR(shi->vn, shi->view) < 0.0f)
 364                         VecMulf(shi->vn, -1.0f);
 365         }
 366
 367         VECCOPY(shi->vno, shi->vn);
 368 }
 369
 370 void shade_input_set_strand_texco(ShadeInput *shi, StrandRen *strand, StrandVert *svert, StrandPoint *spoint)
 371 {
 372         StrandBuffer *strandbuf= strand->buffer;
 373         ObjectRen *obr= strandbuf->obr;
 374         StrandVert *sv;
 375         int mode= shi->mode;            /* or-ed result for all nodes */
 376         short texco= shi->mat->texco;
 377
 378         if((shi->mat->texco & TEXCO_REFL)) {
 379                 /* shi->dxview, shi->dyview, not supported */
 380         }
 381
 382         if(shi->osatex && (texco & (TEXCO_NORM|TEXCO_REFL))) {
 383                 /* not supported */
 384         }
 385
 386         if(mode & (MA_TANGENT_V|MA_NORMAP_TANG)) {
 387                 VECCOPY(shi->tang, spoint->tan);
 388                 VECCOPY(shi->nmaptang, spoint->tan);
 389         }
 390
 391         if(mode & MA_STR_SURFDIFF) {
 392                 float *surfnor= RE_strandren_get_surfnor(obr, strand, 0);
 393
 394                 if(surfnor)
 395                         VECCOPY(shi->surfnor, surfnor)
 396                 else
 397                         VECCOPY(shi->surfnor, shi->vn)
 398
 399                 if(shi->mat->strand_surfnor > 0.0f) {
 400                         shi->surfdist= 0.0f;
 401                         for(sv=strand->vert; sv!=svert; sv++)
 402                                 shi->surfdist+=VecLenf(sv->co, (sv+1)->co);
 403                         shi->surfdist += spoint->t*VecLenf(sv->co, (sv+1)->co);
 404                 }
 405         }
 406
 407         if(R.r.mode & R_SPEED) {
 408                 float *speed;
 409
 410                 speed= RE_strandren_get_winspeed(shi->obi, strand, 0);
 411                 if(speed)
 412                         QUATCOPY(shi->winspeed, speed)
 413                 else
 414                         shi->winspeed[0]= shi->winspeed[1]= shi->winspeed[2]= shi->winspeed[3]= 0.0f;
 415         }
 416
 417         /* shade_input_set_shade_texco equivalent */
 418         if(texco & NEED_UV) {
 419                 if(texco & TEXCO_ORCO) {
 420                         VECCOPY(shi->lo, strand->orco);
 421                         /* no shi->osatex, orco derivatives are zero */
 422                 }
 423
 424                 if(texco & TEXCO_GLOB) {
 425                         VECCOPY(shi->gl, shi->co);
 426                         MTC_Mat4MulVecfl(R.viewinv, shi->gl);
 427
 428                         if(shi->osatex) {
 429                                 VECCOPY(shi->dxgl, shi->dxco);
 430                                 MTC_Mat3MulVecfl(R.imat, shi->dxco);
 431                                 VECCOPY(shi->dygl, shi->dyco);
 432                                 MTC_Mat3MulVecfl(R.imat, shi->dyco);
 433                         }
 434                 }
 435
 436                 if(texco & TEXCO_STRAND) {
 437                         shi->strandco= spoint->strandco;
 438
 439                         if(shi->osatex) {
 440                                 shi->dxstrand= spoint->dtstrandco;
 441                                 shi->dystrand= 0.0f;
 442                         }
 443                 }
 444
 445                 if((texco & TEXCO_UV) || (mode & (MA_VERTEXCOL|MA_VERTEXCOLP|MA_FACETEXTURE)))  {
 446                         MCol *mcol;
 447                         float *uv;
 448                         char *name;
 449                         int i;
 450
 451                         shi->totuv= 0;
 452                         shi->totcol= 0;
 453                         shi->actuv= obr->actmtface;
 454                         shi->actcol= obr->actmcol;
 455
 456                         if(mode & (MA_VERTEXCOL|MA_VERTEXCOLP)) {
 457                                 for (i=0; (mcol=RE_strandren_get_mcol(obr, strand, i, &name, 0)); i++) {
 458                                         ShadeInputCol *scol= &shi->col[i];
 459                                         char *cp= (char*)mcol;
 460
 461                                         shi->totcol++;
 462                                         scol->name= name;
 463
 464                                         scol->col[0]= cp[3]/255.0f;
 465                                         scol->col[1]= cp[2]/255.0f;
 466                                         scol->col[2]= cp[1]/255.0f;
 467                                 }
 468
 469                                 if(shi->totcol) {
 470                                         shi->vcol[0]= shi->col[shi->actcol].col[0];
 471                                         shi->vcol[1]= shi->col[shi->actcol].col[1];
 472                                         shi->vcol[2]= shi->col[shi->actcol].col[2];
 473                                 }
 474                                 else {
 475                                         shi->vcol[0]= 0.0f;
 476                                         shi->vcol[1]= 0.0f;
 477                                         shi->vcol[2]= 0.0f;
 478                                 }
 479                         }
 480
 481                         for (i=0; (uv=RE_strandren_get_uv(obr, strand, i, &name, 0)); i++) {
 482                                 ShadeInputUV *suv= &shi->uv[i];
 483
 484                                 shi->totuv++;
 485                                 suv->name= name;
 486
 487                                 if(strandbuf->overrideuv == i) {
 488                                         suv->uv[0]= -1.0f;
 489                                         suv->uv[1]= spoint->strandco;
 490                                         suv->uv[2]= 0.0f;
 491                                 }
 492                                 else {
 493                                         suv->uv[0]= -1.0f + 2.0f*uv[0];
 494                                         suv->uv[1]= -1.0f + 2.0f*uv[1];
 495                                         suv->uv[2]= 0.0f;       /* texture.c assumes there are 3 coords */
 496                                 }
 497
 498                                 if(shi->osatex) {
 499                                         suv->dxuv[0]= 0.0f;
 500                                         suv->dxuv[1]= 0.0f;
 501                                         suv->dyuv[0]= 0.0f;
 502                                         suv->dyuv[1]= 0.0f;
 503                                 }
 504
 505                                 if((mode & MA_FACETEXTURE) && i==obr->actmtface) {
 506                                         if((mode & (MA_VERTEXCOL|MA_VERTEXCOLP))==0) {
 507                                                 shi->vcol[0]= 1.0f;
 508                                                 shi->vcol[1]= 1.0f;
 509                                                 shi->vcol[2]= 1.0f;
 510                                         }
 511                                 }
 512                         }
 513
 514                         if(shi->totuv == 0) {
 515                                 ShadeInputUV *suv= &shi->uv[0];
 516
 517                                 suv->uv[0]= 0.0f;
 518                                 suv->uv[1]= spoint->strandco;
 519                                 suv->uv[2]= 0.0f;       /* texture.c assumes there are 3 coords */
 520
 521                                 if(mode & MA_FACETEXTURE) {
 522                                         /* no tface? set at 1.0f */
 523                                         shi->vcol[0]= 1.0f;
 524                                         shi->vcol[1]= 1.0f;
 525                                         shi->vcol[2]= 1.0f;
 526                                 }
 527                         }
 528
 529                 }
 530
 531                 if(texco & TEXCO_NORM) {
 532                         shi->orn[0]= -shi->vn[0];
 533                         shi->orn[1]= -shi->vn[1];
 534                         shi->orn[2]= -shi->vn[2];
 535                 }
 536
 537                 if(mode & MA_RADIO) {
 538                         /* not supported */
 539                 }
 540
 541                 if(texco & TEXCO_REFL) {
 542                         /* mirror reflection color textures (and envmap) */
 543                         calc_R_ref(shi);    /* wrong location for normal maps! XXXXXXXXXXXXXX */
 544                 }
 545
 546                 if(texco & TEXCO_STRESS) {
 547                         /* not supported */
 548                 }
 549
 550                 if(texco & TEXCO_TANGENT) {
 551                         if((mode & MA_TANGENT_V)==0) {
 552                                 /* just prevent surprises */
 553                                 shi->tang[0]= shi->tang[1]= shi->tang[2]= 0.0f;
 554                                 shi->nmaptang[0]= shi->nmaptang[1]= shi->nmaptang[2]= 0.0f;
 555                         }
 556                 }
 557         }
 558
 559         shi->rad[0]= shi->rad[1]= shi->rad[2]= 0.0f;
 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                 if(texco & TEXCO_STICKY) {
 578                         /* not supported */
 579                 }
 580         }
 581 }
 582
 583 /* scanline pixel coordinates */
 584 /* requires set_triangle */
 585 void shade_input_set_viewco(ShadeInput *shi, float x, float y, float z)
 586 {
 587         float fac;
 588
 589         /* currently in use for dithering (soft shadow), node preview, irregular shad */
 590         shi->xs= (int)(x);
 591         shi->ys= (int)(y);
 592
 593         calc_view_vector(shi->view, x, y);      /* returns not normalized, so is in viewplane coords */
 594
 595         /* wire cannot use normal for calculating shi->co */
 596         if(shi->mat->mode & MA_WIRE) {
 597
 598                 if(R.r.mode & R_ORTHO)
 599                         calc_renderco_ortho(shi->co, x, y, z);
 600                 else
 601                         calc_renderco_zbuf(shi->co, shi->view, z);
 602         }
 603         else {
 604                 float dface, v1[3];
 605
 606                 VECCOPY(v1, shi->v1->co);
 607
 608                 if(shi->obi->flag & R_TRANSFORMED)
 609                         Mat4MulVecfl(shi->obi->mat, v1);
 610
 611                 dface= v1[0]*shi->facenor[0]+v1[1]*shi->facenor[1]+v1[2]*shi->facenor[2];
 612
 613                 /* ortho viewplane cannot intersect using view vector originating in (0,0,0) */
 614                 if(R.r.mode & R_ORTHO) {
 615                         /* x and y 3d coordinate can be derived from pixel coord and winmat */
 616                         float fx= 2.0f/(R.winx*R.winmat[0][0]);
 617                         float fy= 2.0f/(R.winy*R.winmat[1][1]);
 618
 619                         shi->co[0]= (x - 0.5f*R.winx)*fx - R.winmat[3][0]/R.winmat[0][0];
 620                         shi->co[1]= (y - 0.5f*R.winy)*fy - R.winmat[3][1]/R.winmat[1][1];
 621
 622                         /* using a*x + b*y + c*z = d equation, (a b c) is normal */
 623                         if(shi->facenor[2]!=0.0f)
 624                                 shi->co[2]= (dface - shi->facenor[0]*shi->co[0] - shi->facenor[1]*shi->co[1])/shi->facenor[2];
 625                         else
 626                                 shi->co[2]= 0.0f;
 627
 628                         if(shi->osatex || (R.r.mode & R_SHADOW) ) {
 629                                 shi->dxco[0]= fx;
 630                                 shi->dxco[1]= 0.0f;
 631                                 if(shi->facenor[2]!=0.0f)
 632                                         shi->dxco[2]= (shi->facenor[0]*fx)/shi->facenor[2];
 633                                 else
 634                                         shi->dxco[2]= 0.0f;
 635
 636                                 shi->dyco[0]= 0.0f;
 637                                 shi->dyco[1]= fy;
 638                                 if(shi->facenor[2]!=0.0f)
 639                                         shi->dyco[2]= (shi->facenor[1]*fy)/shi->facenor[2];
 640                                 else
 641                                         shi->dyco[2]= 0.0f;
 642
 643                                 if( (shi->mat->texco & TEXCO_REFL) ) {
 644                                         if(shi->co[2]!=0.0f) fac= 1.0f/shi->co[2]; else fac= 0.0f;
 645                                         shi->dxview= -R.viewdx*fac;
 646                                         shi->dyview= -R.viewdy*fac;
 647                                 }
 648                         }
 649                 }
 650                 else {
 651                         float div;
 652
 653                         div= shi->facenor[0]*shi->view[0] + shi->facenor[1]*shi->view[1] + shi->facenor[2]*shi->view[2];
 654                         if (div!=0.0f) fac= dface/div;
 655                         else fac= 0.0f;
 656
 657                         shi->co[0]= fac*shi->view[0];
 658                         shi->co[1]= fac*shi->view[1];
 659                         shi->co[2]= fac*shi->view[2];
 660
 661                         /* pixel dx/dy for render coord */
 662                         if(shi->osatex || (R.r.mode & R_SHADOW) ) {
 663                                 float u= dface/(div - R.viewdx*shi->facenor[0]);
 664                                 float v= dface/(div - R.viewdy*shi->facenor[1]);
 665
 666                                 shi->dxco[0]= shi->co[0]- (shi->view[0]-R.viewdx)*u;
 667                                 shi->dxco[1]= shi->co[1]- (shi->view[1])*u;
 668                                 shi->dxco[2]= shi->co[2]- (shi->view[2])*u;
 669
 670                                 shi->dyco[0]= shi->co[0]- (shi->view[0])*v;
 671                                 shi->dyco[1]= shi->co[1]- (shi->view[1]-R.viewdy)*v;
 672                                 shi->dyco[2]= shi->co[2]- (shi->view[2])*v;
 673
 674                                 if( (shi->mat->texco & TEXCO_REFL) ) {
 675                                         if(fac!=0.0f) fac= 1.0f/fac;
 676                                         shi->dxview= -R.viewdx*fac;
 677                                         shi->dyview= -R.viewdy*fac;
 678                                 }
 679                         }
 680                 }
 681         }
 682
 683         /* set camera coords - for scanline, it's always 0.0,0.0,0.0 (render is in camera space)
 684          * however for raytrace it can be different - the position of the last intersection */
 685         shi->camera_co[0] = shi->camera_co[1] = shi->camera_co[2] = 0.0f;
 686
 687         /* cannot normalize earlier, code above needs it at viewplane level */
 688         Normalize(shi->view);
 689 }
 690
 691 /* calculate U and V, for scanline (silly render face u and v are in range -1 to 0) */
 692 void shade_input_set_uv(ShadeInput *shi)
 693 {
 694         VlakRen *vlr= shi->vlr;
 695
 696         if((vlr->flag & R_SMOOTH) || (shi->mat->texco & NEED_UV) || (shi->passflag & SCE_PASS_UV)) {
 697                 float v1[3], v2[3], v3[3];
 698
 699                 VECCOPY(v1, shi->v1->co);
 700                 VECCOPY(v2, shi->v2->co);
 701                 VECCOPY(v3, shi->v3->co);
 702
 703                 if(shi->obi->flag & R_TRANSFORMED) {
 704                         Mat4MulVecfl(shi->obi->mat, v1);
 705                         Mat4MulVecfl(shi->obi->mat, v2);
 706                         Mat4MulVecfl(shi->obi->mat, v3);
 707                 }
 708
 709                 /* exception case for wire render of edge */
 710                 if(vlr->v2==vlr->v3) {
 711                         float lend, lenc;
 712
 713                         lend= VecLenf(v2, v1);
 714                         lenc= VecLenf(shi->co, v1);
 715
 716                         if(lend==0.0f) {
 717                                 shi->u=shi->v= 0.0f;
 718                         }
 719                         else {
 720                                 shi->u= - (1.0f - lenc/lend);
 721                                 shi->v= 0.0f;
 722                         }
 723
 724                         if(shi->osatex) {
 725                                 shi->dx_u=  0.0f;
 726                                 shi->dx_v=  0.0f;
 727                                 shi->dy_u=  0.0f;
 728                                 shi->dy_v=  0.0f;
 729                         }
 730                 }
 731                 else {
 732                         /* most of this could become re-used for faces */
 733                         float detsh, t00, t10, t01, t11, xn, yn, zn;
 734                         int axis1, axis2;
 735
 736                         /* find most stable axis to project */
 737                         xn= fabs(shi->facenor[0]);
 738                         yn= fabs(shi->facenor[1]);
 739                         zn= fabs(shi->facenor[2]);
 740
 741                         if(zn>=xn && zn>=yn) { axis1= 0; axis2= 1; }
 742                         else if(yn>=xn && yn>=zn) { axis1= 0; axis2= 2; }
 743                         else { axis1= 1; axis2= 2; }
 744
 745                         /* compute u,v and derivatives */
 746                         t00= v3[axis1]-v1[axis1]; t01= v3[axis2]-v1[axis2];
 747                         t10= v3[axis1]-v2[axis1]; t11= v3[axis2]-v2[axis2];
 748
 749                         detsh= 1.0f/(t00*t11-t10*t01);
 750                         t00*= detsh; t01*=detsh;
 751                         t10*=detsh; t11*=detsh;
 752
 753                         shi->u= (shi->co[axis1]-v3[axis1])*t11-(shi->co[axis2]-v3[axis2])*t10;
 754                         shi->v= (shi->co[axis2]-v3[axis2])*t00-(shi->co[axis1]-v3[axis1])*t01;
 755                         if(shi->osatex) {
 756                                 shi->dx_u=  shi->dxco[axis1]*t11- shi->dxco[axis2]*t10;
 757                                 shi->dx_v=  shi->dxco[axis2]*t00- shi->dxco[axis1]*t01;
 758                                 shi->dy_u=  shi->dyco[axis1]*t11- shi->dyco[axis2]*t10;
 759                                 shi->dy_v=  shi->dyco[axis2]*t00- shi->dyco[axis1]*t01;
 760                         }
 761
 762                         /* u and v are in range -1 to 0, we allow a little bit extra but not too much, screws up speedvectors */
 763                         CLAMP(shi->u, -2.0f, 1.0f);
 764                         CLAMP(shi->v, -2.0f, 1.0f);
 765                 }
 766         }
 767 }
 768
 769 void shade_input_set_normals(ShadeInput *shi)
 770 {
 771         float u= shi->u, v= shi->v;
 772         float l= 1.0f+u+v;
 773
 774         /* calculate vertexnormals */
 775         if(shi->vlr->flag & R_SMOOTH) {
 776                 float *n1= shi->n1, *n2= shi->n2, *n3= shi->n3;
 777
 778                 shi->vn[0]= l*n3[0]-u*n1[0]-v*n2[0];
 779                 shi->vn[1]= l*n3[1]-u*n1[1]-v*n2[1];
 780                 shi->vn[2]= l*n3[2]-u*n1[2]-v*n2[2];
 781
 782                 Normalize(shi->vn);
 783         }
 784         else
 785                 VECCOPY(shi->vn, shi->facenor);
 786
 787         /* used in nodes */
 788         VECCOPY(shi->vno, shi->vn);
 789
 790 }
 791
 792 /* use by raytrace, sss, bake to flip into the right direction */
 793 void shade_input_flip_normals(ShadeInput *shi)
 794 {
 795         shi->facenor[0]= -shi->facenor[0];
 796         shi->facenor[1]= -shi->facenor[1];
 797         shi->facenor[2]= -shi->facenor[2];
 798
 799         shi->vn[0]= -shi->vn[0];
 800         shi->vn[1]= -shi->vn[1];
 801         shi->vn[2]= -shi->vn[2];
 802
 803         shi->vno[0]= -shi->vno[0];
 804         shi->vno[1]= -shi->vno[1];
 805         shi->vno[2]= -shi->vno[2];
 806
 807         shi->flippednor= !shi->flippednor;
 808 }
 809
 810 void shade_input_set_shade_texco(ShadeInput *shi)
 811 {
 812         ObjectInstanceRen *obi= shi->obi;
 813         ObjectRen *obr= shi->obr;
 814         VertRen *v1= shi->v1, *v2= shi->v2, *v3= shi->v3;
 815         float u= shi->u, v= shi->v;
 816         float l= 1.0f+u+v, dl;
 817         int mode= shi->mode;            /* or-ed result for all nodes */
 818         short texco= shi->mat->texco;
 819
 820         /* calculate dxno */
 821         if(shi->vlr->flag & R_SMOOTH) {
 822
 823                 if(shi->osatex && (texco & (TEXCO_NORM|TEXCO_REFL)) ) {
 824                         float *n1= shi->n1, *n2= shi->n2, *n3= shi->n3;
 825
 826                         dl= shi->dx_u+shi->dx_v;
 827                         shi->dxno[0]= dl*n3[0]-shi->dx_u*n1[0]-shi->dx_v*n2[0];
 828                         shi->dxno[1]= dl*n3[1]-shi->dx_u*n1[1]-shi->dx_v*n2[1];
 829                         shi->dxno[2]= dl*n3[2]-shi->dx_u*n1[2]-shi->dx_v*n2[2];
 830                         dl= shi->dy_u+shi->dy_v;
 831                         shi->dyno[0]= dl*n3[0]-shi->dy_u*n1[0]-shi->dy_v*n2[0];
 832                         shi->dyno[1]= dl*n3[1]-shi->dy_u*n1[1]-shi->dy_v*n2[1];
 833                         shi->dyno[2]= dl*n3[2]-shi->dy_u*n1[2]-shi->dy_v*n2[2];
 834
 835                 }
 836         }
 837
 838         /* calc tangents */
 839         if (mode & (MA_TANGENT_V|MA_NORMAP_TANG) || R.flag & R_NEED_TANGENT) {
 840                 float *tangent, *s1, *s2, *s3;
 841                 float tl, tu, tv;
 842
 843                 if(shi->vlr->flag & R_SMOOTH) {
 844                         tl= l;
 845                         tu= u;
 846                         tv= v;
 847                 }
 848                 else {
 849                         /* qdn: flat faces have tangents too,
 850                            could pick either one, using average here */
 851                         tl= 1.0f/3.0f;
 852                         tu= -1.0f/3.0f;
 853                         tv= -1.0f/3.0f;
 854                 }
 855
 856                 shi->tang[0]= shi->tang[1]= shi->tang[2]= 0.0f;
 857                 shi->nmaptang[0]= shi->nmaptang[1]= shi->nmaptang[2]= 0.0f;
 858
 859                 if(mode & MA_TANGENT_V) {
 860                         s1 = RE_vertren_get_tangent(obr, v1, 0);
 861                         s2 = RE_vertren_get_tangent(obr, v2, 0);
 862                         s3 = RE_vertren_get_tangent(obr, v3, 0);
 863
 864                         if(s1 && s2 && s3) {
 865                                 shi->tang[0]= (tl*s3[0] - tu*s1[0] - tv*s2[0]);
 866                                 shi->tang[1]= (tl*s3[1] - tu*s1[1] - tv*s2[1]);
 867                                 shi->tang[2]= (tl*s3[2] - tu*s1[2] - tv*s2[2]);
 868
 869                                 if(obi->flag & R_TRANSFORMED)
 870                                         Mat3MulVecfl(obi->nmat, shi->tang);
 871
 872                                 Normalize(shi->tang);
 873                                 VECCOPY(shi->nmaptang, shi->tang);
 874                         }
 875                 }
 876
 877                 if(mode & MA_NORMAP_TANG || R.flag & R_NEED_TANGENT) {
 878                         tangent= RE_vlakren_get_nmap_tangent(obr, shi->vlr, 0);
 879
 880                         if(tangent) {
 881                                 int j1= shi->i1, j2= shi->i2, j3= shi->i3;
 882
 883                                 vlr_set_uv_indices(shi->vlr, &j1, &j2, &j3);
 884
 885                                 s1= &tangent[j1*3];
 886                                 s2= &tangent[j2*3];
 887                                 s3= &tangent[j3*3];
 888
 889                                 shi->nmaptang[0]= (tl*s3[0] - tu*s1[0] - tv*s2[0]);
 890                                 shi->nmaptang[1]= (tl*s3[1] - tu*s1[1] - tv*s2[1]);
 891                                 shi->nmaptang[2]= (tl*s3[2] - tu*s1[2] - tv*s2[2]);
 892
 893                                 if(obi->flag & R_TRANSFORMED)
 894                                         Mat3MulVecfl(obi->nmat, shi->nmaptang);
 895
 896                                 Normalize(shi->nmaptang);
 897                         }
 898                 }
 899         }
 900
 901         if(mode & MA_STR_SURFDIFF) {
 902                 float *surfnor= RE_vlakren_get_surfnor(obr, shi->vlr, 0);
 903
 904                 if(surfnor) {
 905                         VECCOPY(shi->surfnor, surfnor)
 906                         if(obi->flag & R_TRANSFORMED)
 907                                 Mat3MulVecfl(obi->nmat, shi->surfnor);
 908                 }
 909                 else
 910                         VECCOPY(shi->surfnor, shi->vn)
 911
 912                 shi->surfdist= 0.0f;
 913         }
 914
 915         if(R.r.mode & R_SPEED) {
 916                 float *s1, *s2, *s3;
 917
 918                 s1= RE_vertren_get_winspeed(obi, v1, 0);
 919                 s2= RE_vertren_get_winspeed(obi, v2, 0);
 920                 s3= RE_vertren_get_winspeed(obi, v3, 0);
 921                 if(s1 && s2 && s3) {
 922                         shi->winspeed[0]= (l*s3[0] - u*s1[0] - v*s2[0]);
 923                         shi->winspeed[1]= (l*s3[1] - u*s1[1] - v*s2[1]);
 924                         shi->winspeed[2]= (l*s3[2] - u*s1[2] - v*s2[2]);
 925                         shi->winspeed[3]= (l*s3[3] - u*s1[3] - v*s2[3]);
 926                 }
 927                 else {
 928                         shi->winspeed[0]= shi->winspeed[1]= shi->winspeed[2]= shi->winspeed[3]= 0.0f;
 929                 }
 930         }
 931
 932         /* pass option forces UV calc */
 933         if(shi->passflag & SCE_PASS_UV)
 934                 texco |= (NEED_UV|TEXCO_UV);
 935
 936         /* texture coordinates. shi->dxuv shi->dyuv have been set */
 937         if(texco & NEED_UV) {
 938
 939                 if(texco & TEXCO_ORCO) {
 940                         if(v1->orco) {
 941                                 float *o1, *o2, *o3;
 942
 943                                 o1= v1->orco;
 944                                 o2= v2->orco;
 945                                 o3= v3->orco;
 946
 947                                 shi->lo[0]= l*o3[0]-u*o1[0]-v*o2[0];
 948                                 shi->lo[1]= l*o3[1]-u*o1[1]-v*o2[1];
 949                                 shi->lo[2]= l*o3[2]-u*o1[2]-v*o2[2];
 950
 951                                 if(shi->osatex) {
 952                                         dl= shi->dx_u+shi->dx_v;
 953                                         shi->dxlo[0]= dl*o3[0]-shi->dx_u*o1[0]-shi->dx_v*o2[0];
 954                                         shi->dxlo[1]= dl*o3[1]-shi->dx_u*o1[1]-shi->dx_v*o2[1];
 955                                         shi->dxlo[2]= dl*o3[2]-shi->dx_u*o1[2]-shi->dx_v*o2[2];
 956                                         dl= shi->dy_u+shi->dy_v;
 957                                         shi->dylo[0]= dl*o3[0]-shi->dy_u*o1[0]-shi->dy_v*o2[0];
 958                                         shi->dylo[1]= dl*o3[1]-shi->dy_u*o1[1]-shi->dy_v*o2[1];
 959                                         shi->dylo[2]= dl*o3[2]-shi->dy_u*o1[2]-shi->dy_v*o2[2];
 960                                 }
 961                         }
 962
 963                         VECCOPY(shi->duplilo, obi->dupliorco);
 964                 }
 965
 966                 if(texco & TEXCO_GLOB) {
 967                         VECCOPY(shi->gl, shi->co);
 968                         MTC_Mat4MulVecfl(R.viewinv, shi->gl);
 969                         if(shi->osatex) {
 970                                 VECCOPY(shi->dxgl, shi->dxco);
 971                                 MTC_Mat3MulVecfl(R.imat, shi->dxco);
 972                                 VECCOPY(shi->dygl, shi->dyco);
 973                                 MTC_Mat3MulVecfl(R.imat, shi->dyco);
 974                         }
 975                 }
 976
 977                 if(texco & TEXCO_STRAND) {
 978                         shi->strandco= (l*v3->accum - u*v1->accum - v*v2->accum);
 979                         if(shi->osatex) {
 980                                 dl= shi->dx_u+shi->dx_v;
 981                                 shi->dxstrand= dl*v3->accum-shi->dx_u*v1->accum-shi->dx_v*v2->accum;
 982                                 dl= shi->dy_u+shi->dy_v;
 983                                 shi->dystrand= dl*v3->accum-shi->dy_u*v1->accum-shi->dy_v*v2->accum;
 984                         }
 985                 }
 986
 987                 if((texco & TEXCO_UV) || (mode & (MA_VERTEXCOL|MA_VERTEXCOLP|MA_FACETEXTURE)))  {
 988                         VlakRen *vlr= shi->vlr;
 989                         MTFace *tface;
 990                         MCol *mcol;
 991                         char *name;
 992                         int i, j1=shi->i1, j2=shi->i2, j3=shi->i3;
 993
 994                         /* uv and vcols are not copied on split, so set them according vlr divide flag */
 995                         vlr_set_uv_indices(vlr, &j1, &j2, &j3);
 996
 997                         shi->totuv= 0;
 998                         shi->totcol= 0;
 999                         shi->actuv= obr->actmtface;
1000                         shi->actcol= obr->actmcol;
1001
1002                         if(mode & (MA_VERTEXCOL|MA_VERTEXCOLP)) {
1003                                 for (i=0; (mcol=RE_vlakren_get_mcol(obr, vlr, i, &name, 0)); i++) {
1004                                         ShadeInputCol *scol= &shi->col[i];
1005                                         char *cp1, *cp2, *cp3;
1006
1007                                         shi->totcol++;
1008                                         scol->name= name;
1009
1010                                         cp1= (char *)(mcol+j1);
1011                                         cp2= (char *)(mcol+j2);
1012                                         cp3= (char *)(mcol+j3);
1013
1014                                         scol->col[0]= (l*((float)cp3[3]) - u*((float)cp1[3]) - v*((float)cp2[3]))/255.0f;
1015                                         scol->col[1]= (l*((float)cp3[2]) - u*((float)cp1[2]) - v*((float)cp2[2]))/255.0f;
1016                                         scol->col[2]= (l*((float)cp3[1]) - u*((float)cp1[1]) - v*((float)cp2[1]))/255.0f;
1017                                 }
1018
1019                                 if(shi->totcol) {
1020                                         shi->vcol[0]= shi->col[shi->actcol].col[0];
1021                                         shi->vcol[1]= shi->col[shi->actcol].col[1];
1022                                         shi->vcol[2]= shi->col[shi->actcol].col[2];
1023                                         shi->vcol[3]= 1.0f;
1024                                 }
1025                                 else {
1026                                         shi->vcol[0]= 0.0f;
1027                                         shi->vcol[1]= 0.0f;
1028                                         shi->vcol[2]= 0.0f;
1029                                         shi->vcol[3]= 1.0f;
1030                                 }
1031                         }
1032
1033                         for (i=0; (tface=RE_vlakren_get_tface(obr, vlr, i, &name, 0)); i++) {
1034                                 ShadeInputUV *suv= &shi->uv[i];
1035                                 float *uv1, *uv2, *uv3;
1036
1037                                 shi->totuv++;
1038                                 suv->name= name;
1039
1040                                 uv1= tface->uv[j1];
1041                                 uv2= tface->uv[j2];
1042                                 uv3= tface->uv[j3];
1043
1044                                 suv->uv[0]= -1.0f + 2.0f*(l*uv3[0]-u*uv1[0]-v*uv2[0]);
1045                                 suv->uv[1]= -1.0f + 2.0f*(l*uv3[1]-u*uv1[1]-v*uv2[1]);
1046                                 suv->uv[2]= 0.0f;       /* texture.c assumes there are 3 coords */
1047
1048                                 if(shi->osatex) {
1049                                         float duv[2];
1050
1051                                         dl= shi->dx_u+shi->dx_v;
1052                                         duv[0]= shi->dx_u;
1053                                         duv[1]= shi->dx_v;
1054
1055                                         suv->dxuv[0]= 2.0f*(dl*uv3[0]-duv[0]*uv1[0]-duv[1]*uv2[0]);
1056                                         suv->dxuv[1]= 2.0f*(dl*uv3[1]-duv[0]*uv1[1]-duv[1]*uv2[1]);
1057
1058                                         dl= shi->dy_u+shi->dy_v;
1059                                         duv[0]= shi->dy_u;
1060                                         duv[1]= shi->dy_v;
1061
1062                                         suv->dyuv[0]= 2.0f*(dl*uv3[0]-duv[0]*uv1[0]-duv[1]*uv2[0]);
1063                                         suv->dyuv[1]= 2.0f*(dl*uv3[1]-duv[0]*uv1[1]-duv[1]*uv2[1]);
1064                                 }
1065
1066                                 if((mode & MA_FACETEXTURE) && i==obr->actmtface) {
1067                                         if((mode & (MA_VERTEXCOL|MA_VERTEXCOLP))==0) {
1068                                                 shi->vcol[0]= 1.0f;
1069                                                 shi->vcol[1]= 1.0f;
1070                                                 shi->vcol[2]= 1.0f;
1071                                                 shi->vcol[3]= 1.0f;
1072                                         }
1073                                         if(tface && tface->tpage)
1074                                                 render_realtime_texture(shi, tface->tpage);
1075                                 }
1076                         }
1077
1078                         shi->dupliuv[0]= -1.0f + 2.0f*obi->dupliuv[0];
1079                         shi->dupliuv[1]= -1.0f + 2.0f*obi->dupliuv[1];
1080                         shi->dupliuv[2]= 0.0f;
1081
1082                         if(shi->totuv == 0) {
1083                                 ShadeInputUV *suv= &shi->uv[0];
1084
1085                                 suv->uv[0]= 2.0f*(u+.5f);
1086                                 suv->uv[1]= 2.0f*(v+.5f);
1087                                 suv->uv[2]= 0.0f;       /* texture.c assumes there are 3 coords */
1088
1089                                 if(mode & MA_FACETEXTURE) {
1090                                         /* no tface? set at 1.0f */
1091                                         shi->vcol[0]= 1.0f;
1092                                         shi->vcol[1]= 1.0f;
1093                                         shi->vcol[2]= 1.0f;
1094                                         shi->vcol[3]= 1.0f;
1095                                 }
1096                         }
1097                 }
1098
1099                 if(texco & TEXCO_NORM) {
1100                         shi->orn[0]= -shi->vn[0];
1101                         shi->orn[1]= -shi->vn[1];
1102                         shi->orn[2]= -shi->vn[2];
1103                 }
1104
1105                 if(mode & MA_RADIO) {
1106                         float *r1, *r2, *r3;
1107
1108                         r1= RE_vertren_get_rad(obr, v1, 0);
1109                         r2= RE_vertren_get_rad(obr, v2, 0);
1110                         r3= RE_vertren_get_rad(obr, v3, 0);
1111
1112                         if(r1 && r2 && r3) {
1113                                 shi->rad[0]= (l*r3[0] - u*r1[0] - v*r2[0]);
1114                                 shi->rad[1]= (l*r3[1] - u*r1[1] - v*r2[1]);
1115                                 shi->rad[2]= (l*r3[2] - u*r1[2] - v*r2[2]);
1116                         }
1117                         else
1118                                 shi->rad[0]= shi->rad[1]= shi->rad[2]= 0.0f;
1119                 }
1120                 else
1121                         shi->rad[0]= shi->rad[1]= shi->rad[2]= 0.0f;
1122
1123                 if(texco & TEXCO_REFL) {
1124                         /* mirror reflection color textures (and envmap) */
1125                         calc_R_ref(shi);        /* wrong location for normal maps! XXXXXXXXXXXXXX */
1126                 }
1127
1128                 if(texco & TEXCO_STRESS) {
1129                         float *s1, *s2, *s3;
1130
1131                         s1= RE_vertren_get_stress(obr, v1, 0);
1132                         s2= RE_vertren_get_stress(obr, v2, 0);
1133                         s3= RE_vertren_get_stress(obr, v3, 0);
1134                         if(s1 && s2 && s3) {
1135                                 shi->stress= l*s3[0] - u*s1[0] - v*s2[0];
1136                                 if(shi->stress<1.0f) shi->stress-= 1.0f;
1137                                 else shi->stress= (shi->stress-1.0f)/shi->stress;
1138                         }
1139                         else shi->stress= 0.0f;
1140                 }
1141
1142                 if(texco & TEXCO_TANGENT) {
1143                         if((mode & MA_TANGENT_V)==0) {
1144                                 /* just prevent surprises */
1145                                 shi->tang[0]= shi->tang[1]= shi->tang[2]= 0.0f;
1146                                 shi->nmaptang[0]= shi->nmaptang[1]= shi->nmaptang[2]= 0.0f;
1147                         }
1148                 }
1149         }
1150         else
1151                 shi->rad[0]= shi->rad[1]= shi->rad[2]= 0.0f;
1152
1153         /* this only avalailable for scanline renders */
1154         if(shi->depth==0) {
1155                 float x= shi->xs;
1156                 float y= shi->ys;
1157
1158                 if(texco & TEXCO_WINDOW) {
1159                         shi->winco[0]= -1.0f + 2.0f*x/(float)R.winx;
1160                         shi->winco[1]= -1.0f + 2.0f*y/(float)R.winy;
1161                         shi->winco[2]= 0.0f;
1162                         if(shi->osatex) {
1163                                 shi->dxwin[0]= 2.0f/(float)R.winx;
1164                                 shi->dywin[1]= 2.0f/(float)R.winy;
1165                                 shi->dxwin[1]= shi->dxwin[2]= 0.0f;
1166                                 shi->dywin[0]= shi->dywin[2]= 0.0f;
1167                         }
1168                 }
1169
1170                 if(texco & TEXCO_STICKY) {
1171                         float *s1, *s2, *s3;
1172
1173                         s1= RE_vertren_get_sticky(obr, v1, 0);
1174                         s2= RE_vertren_get_sticky(obr, v2, 0);
1175                         s3= RE_vertren_get_sticky(obr, v3, 0);
1176
1177                         if(s1 && s2 && s3) {
1178                                 float winmat[4][4], ho1[4], ho2[4], ho3[4];
1179                                 float Zmulx, Zmuly;
1180                                 float hox, hoy, l, dl, u, v;
1181                                 float s00, s01, s10, s11, detsh;
1182
1183                                 /* old globals, localized now */
1184                                 Zmulx=  ((float)R.winx)/2.0f; Zmuly=  ((float)R.winy)/2.0f;
1185
1186                                 if(shi->obi->flag & R_TRANSFORMED)
1187                                         zbuf_make_winmat(&R, shi->obi->mat, winmat);
1188                                 else
1189                                         zbuf_make_winmat(&R, NULL, winmat);
1190
1191                                 zbuf_render_project(winmat, v1->co, ho1);
1192                                 zbuf_render_project(winmat, v2->co, ho2);
1193                                 zbuf_render_project(winmat, v3->co, ho3);
1194
1195                                 s00= ho3[0]/ho3[3] - ho1[0]/ho1[3];
1196                                 s01= ho3[1]/ho3[3] - ho1[1]/ho1[3];
1197                                 s10= ho3[0]/ho3[3] - ho2[0]/ho2[3];
1198                                 s11= ho3[1]/ho3[3] - ho2[1]/ho2[3];
1199
1200                                 detsh= s00*s11-s10*s01;
1201                                 s00/= detsh; s01/=detsh;
1202                                 s10/=detsh; s11/=detsh;
1203
1204                                 /* recalc u and v again */
1205                                 hox= x/Zmulx -1.0f;
1206                                 hoy= y/Zmuly -1.0f;
1207                                 u= (hox - ho3[0]/ho3[3])*s11 - (hoy - ho3[1]/ho3[3])*s10;
1208                                 v= (hoy - ho3[1]/ho3[3])*s00 - (hox - ho3[0]/ho3[3])*s01;
1209                                 l= 1.0f+u+v;
1210
1211                                 shi->sticky[0]= l*s3[0]-u*s1[0]-v*s2[0];
1212                                 shi->sticky[1]= l*s3[1]-u*s1[1]-v*s2[1];
1213                                 shi->sticky[2]= 0.0f;
1214
1215                                 if(shi->osatex) {
1216                                         float dxuv[2], dyuv[2];
1217                                         dxuv[0]=  s11/Zmulx;
1218                                         dxuv[1]=  - s01/Zmulx;
1219                                         dyuv[0]=  - s10/Zmuly;
1220                                         dyuv[1]=  s00/Zmuly;
1221
1222                                         dl= dxuv[0] + dxuv[1];
1223                                         shi->dxsticky[0]= dl*s3[0] - dxuv[0]*s1[0] - dxuv[1]*s2[0];
1224                                         shi->dxsticky[1]= dl*s3[1] - dxuv[0]*s1[1] - dxuv[1]*s2[1];
1225                                         dl= dyuv[0] + dyuv[1];
1226                                         shi->dysticky[0]= dl*s3[0] - dyuv[0]*s1[0] - dyuv[1]*s2[0];
1227                                         shi->dysticky[1]= dl*s3[1] - dyuv[0]*s1[1] - dyuv[1]*s2[1];
1228                                 }
1229                         }
1230                 }
1231         } /* else {
1232          Note! For raytracing winco is not set, important because thus means all shader input's need to have their variables set to zero else in-initialized values are used
1233         */
1234 }
1235
1236 /* ****************** ShadeSample ************************************** */
1237
1238 /* initialize per part, not per pixel! */
1239 void shade_input_initialize(ShadeInput *shi, RenderPart *pa, RenderLayer *rl, int sample)
1240 {
1241
1242         memset(shi, 0, sizeof(ShadeInput));
1243
1244         shi->sample= sample;
1245         shi->thread= pa->thread;
1246         shi->do_preview= R.r.scemode & R_NODE_PREVIEW;
1247         shi->lay= rl->lay;
1248         shi->layflag= rl->layflag;
1249         shi->passflag= rl->passflag;
1250         shi->combinedflag= ~rl->pass_xor;
1251         shi->mat_override= rl->mat_override;
1252         shi->light_override= rl->light_override;
1253 //      shi->rl= rl;
1254         /* note shi.depth==0  means first hit, not raytracing */
1255
1256 }
1257
1258 /* initialize per part, not per pixel! */
1259 void shade_sample_initialize(ShadeSample *ssamp, RenderPart *pa, RenderLayer *rl)
1260 {
1261         int a, tot;
1262
1263         tot= R.osa==0?1:R.osa;
1264
1265         for(a=0; a<tot; a++) {
1266                 shade_input_initialize(&ssamp->shi[a], pa, rl, a);
1267                 memset(&ssamp->shr[a], 0, sizeof(ShadeResult));
1268         }
1269
1270         get_sample_layers(pa, rl, ssamp->rlpp);
1271 }
1272
1273 /* Do AO or (future) GI */
1274 void shade_samples_do_AO(ShadeSample *ssamp)
1275 {
1276         ShadeInput *shi;
1277         int sample;
1278
1279         if(!(R.r.mode & R_SHADOW))
1280                 return;
1281         if(!(R.r.mode & R_RAYTRACE) && !(R.wrld.ao_gather_method == WO_AOGATHER_APPROX))
1282                 return;
1283
1284         if(R.wrld.mode & WO_AMB_OCC) {
1285                 shi= &ssamp->shi[0];
1286
1287                 if(((shi->passflag & SCE_PASS_COMBINED) && (shi->combinedflag & SCE_PASS_AO))
1288                         || (shi->passflag & SCE_PASS_AO))
1289                         for(sample=0, shi= ssamp->shi; sample<ssamp->tot; shi++, sample++)
1290                                 if(!(shi->mode & MA_SHLESS))
1291                                         ambient_occlusion(shi);         /* stores in shi->ao[] */
1292         }
1293 }
1294
1295
1296 void shade_samples_fill_with_ps(ShadeSample *ssamp, PixStr *ps, int x, int y)
1297 {
1298         ShadeInput *shi;
1299         float xs, ys;
1300
1301         ssamp->tot= 0;
1302
1303         for(shi= ssamp->shi; ps; ps= ps->next) {
1304                 shade_input_set_triangle(shi, ps->obi, ps->facenr, 1);
1305
1306                 if(shi->vlr) {  /* NULL happens for env material or for 'all z' */
1307                         unsigned short curmask= ps->mask;
1308
1309                         /* full osa is only set for OSA renders */
1310                         if(shi->vlr->flag & R_FULL_OSA) {
1311                                 short shi_cp= 0, samp;
1312
1313                                 for(samp=0; samp<R.osa; samp++) {
1314                                         if(curmask & (1<<samp)) {
1315                                                 xs= (float)x + R.jit[samp][0] + 0.5f;   /* zbuffer has this inverse corrected, ensures xs,ys are inside pixel */
1316                                                 ys= (float)y + R.jit[samp][1] + 0.5f;
1317
1318                                                 if(shi_cp)
1319                                                         shade_input_copy_triangle(shi, shi-1);
1320
1321                                                 shi->mask= (1<<samp);
1322 //                                              shi->rl= ssamp->rlpp[samp];
1323                                                 shi->samplenr= R.shadowsamplenr[shi->thread]++; /* this counter is not being reset per pixel */
1324                                                 shade_input_set_viewco(shi, xs, ys, (float)ps->z);
1325                                                 shade_input_set_uv(shi);
1326                                                 shade_input_set_normals(shi);
1327
1328                                                 shi_cp= 1;
1329                                                 shi++;
1330                                         }
1331                                 }
1332                         }
1333                         else {
1334                                 if(R.osa) {
1335                                         short b= R.samples->centmask[curmask];
1336                                         xs= (float)x + R.samples->centLut[b & 15] + 0.5f;
1337                                         ys= (float)y + R.samples->centLut[b>>4] + 0.5f;
1338                                 }
1339                                 else {
1340                                         xs= (float)x + 0.5f;
1341                                         ys= (float)y + 0.5f;
1342                                 }
1343                                 shi->mask= curmask;
1344                                 shi->samplenr= R.shadowsamplenr[shi->thread]++;
1345                                 shade_input_set_viewco(shi, xs, ys, (float)ps->z);
1346                                 shade_input_set_uv(shi);
1347                                 shade_input_set_normals(shi);
1348                                 shi++;
1349                         }
1350
1351                         /* total sample amount, shi->sample is static set in initialize */
1352                         if(shi!=ssamp->shi)
1353                                 ssamp->tot= (shi-1)->sample + 1;
1354                 }
1355         }
1356 }
1357
1358 /* shades samples, returns true if anything happened */
1359 int shade_samples(ShadeSample *ssamp, PixStr *ps, int x, int y)
1360 {
1361         shade_samples_fill_with_ps(ssamp, ps, x, y);
1362
1363         if(ssamp->tot) {
1364                 ShadeInput *shi= ssamp->shi;
1365                 ShadeResult *shr= ssamp->shr;
1366                 int samp;
1367
1368                 /* if shadow or AO? */
1369                 shade_samples_do_AO(ssamp);
1370
1371                 /* if shade (all shadepinputs have same passflag) */
1372                 if(ssamp->shi[0].passflag & ~(SCE_PASS_Z|SCE_PASS_INDEXOB)) {
1373
1374                         for(samp=0; samp<ssamp->tot; samp++, shi++, shr++) {
1375                                 shade_input_set_shade_texco(shi);
1376                                 shade_input_do_shade(shi, shr);
1377                         }
1378                 }
1379
1380                 return 1;
1381         }
1382         return 0;
1383 }
1384