| 14 |
|
#include "otypes.h" |
| 15 |
|
#include "otspecial.h" |
| 16 |
|
#include "random.h" |
| 17 |
+ |
#include "pmap.h" |
| 18 |
|
|
| 19 |
|
#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
| 20 |
|
|
| 36 |
|
static void checkset(OBJECT *os, OBJECT *cs); |
| 37 |
|
|
| 38 |
|
|
| 39 |
< |
extern int |
| 39 |
> |
int |
| 40 |
|
rayorigin( /* start new ray from old one */ |
| 41 |
|
RAY *r, |
| 42 |
|
int rt, |
| 51 |
|
setcolor(r->rcoef, 1., 1., 1.); |
| 52 |
|
} else { |
| 53 |
|
rw = intens(rc); |
| 54 |
+ |
if (rw > 1.0) |
| 55 |
+ |
rw = 1.0; /* avoid calculation growth */ |
| 56 |
|
if (rc != r->rcoef) |
| 57 |
|
copycolor(r->rcoef, rc); |
| 58 |
|
} |
| 109 |
|
return(-1); |
| 110 |
|
if (r->crtype & SHADOW) /* shadow commitment */ |
| 111 |
|
return(0); |
| 112 |
< |
if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
| 112 |
> |
/* ambient in photon map? */ |
| 113 |
> |
if (ro != NULL && ro->crtype & AMBIENT) { |
| 114 |
> |
if (causticPhotonMapping) |
| 115 |
> |
return(-1); |
| 116 |
> |
if (photonMapping && rt != TRANS) |
| 117 |
> |
return(-1); |
| 118 |
> |
} |
| 119 |
> |
if ((maxdepth <= 0) & (rc != NULL)) { /* Russian roulette */ |
| 120 |
|
if (minweight <= 0.0) |
| 121 |
|
error(USER, "zero ray weight in Russian roulette"); |
| 122 |
< |
if (maxdepth < 0 && r->rlvl > -maxdepth) |
| 122 |
> |
if ((maxdepth < 0) & (r->rlvl > -maxdepth)) |
| 123 |
|
return(-1); /* upper reflection limit */ |
| 124 |
|
if (r->rweight >= minweight) |
| 125 |
|
return(0); |
| 130 |
|
r->rweight = minweight; |
| 131 |
|
return(0); |
| 132 |
|
} |
| 133 |
< |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
| 133 |
> |
return((r->rweight >= minweight) & (r->rlvl <= abs(maxdepth)) ? 0 : -1); |
| 134 |
|
} |
| 135 |
|
|
| 136 |
|
|
| 137 |
< |
extern void |
| 137 |
> |
void |
| 138 |
|
rayclear( /* clear a ray for (re)evaluation */ |
| 139 |
|
RAY *r |
| 140 |
|
) |
| 145 |
|
r->robj = OVOID; |
| 146 |
|
r->ro = NULL; |
| 147 |
|
r->rox = NULL; |
| 148 |
< |
r->rt = r->rot = FHUGE; |
| 148 |
> |
r->rxt = r->rmt = r->rot = FHUGE; |
| 149 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 150 |
+ |
r->rflips = 0; |
| 151 |
|
r->uv[0] = r->uv[1] = 0.0; |
| 152 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
| 153 |
+ |
setcolor(r->mcol, 0.0, 0.0, 0.0); |
| 154 |
|
setcolor(r->rcol, 0.0, 0.0, 0.0); |
| 155 |
|
} |
| 156 |
|
|
| 157 |
|
|
| 158 |
< |
extern void |
| 158 |
> |
void |
| 159 |
|
raytrace( /* trace a ray and compute its value */ |
| 160 |
|
RAY *r |
| 161 |
|
) |
| 175 |
|
} |
| 176 |
|
|
| 177 |
|
|
| 178 |
< |
extern void |
| 178 |
> |
void |
| 179 |
|
raycont( /* check for clipped object and continue */ |
| 180 |
|
RAY *r |
| 181 |
|
) |
| 186 |
|
} |
| 187 |
|
|
| 188 |
|
|
| 189 |
< |
extern void |
| 189 |
> |
void |
| 190 |
|
raytrans( /* transmit ray as is */ |
| 191 |
|
RAY *r |
| 192 |
|
) |
| 193 |
|
{ |
| 194 |
|
RAY tr; |
| 195 |
|
|
| 196 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
| 197 |
< |
VCOPY(tr.rdir, r->rdir); |
| 198 |
< |
rayvalue(&tr); |
| 199 |
< |
copycolor(r->rcol, tr.rcol); |
| 200 |
< |
r->rt = r->rot + tr.rt; |
| 196 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
| 197 |
> |
VCOPY(tr.rdir, r->rdir); |
| 198 |
> |
rayvalue(&tr); |
| 199 |
> |
copycolor(r->mcol, tr.mcol); |
| 200 |
> |
copycolor(r->rcol, tr.rcol); |
| 201 |
> |
r->rmt = r->rot + tr.rmt; |
| 202 |
> |
r->rxt = r->rot + tr.rxt; |
| 203 |
> |
} |
| 204 |
> |
|
| 205 |
> |
|
| 206 |
> |
int |
| 207 |
> |
raytirrad( /* irradiance hack */ |
| 208 |
> |
OBJREC *m, |
| 209 |
> |
RAY *r |
| 210 |
> |
) |
| 211 |
> |
{ |
| 212 |
> |
if (ofun[m->otype].flags & (T_M|T_X) && m->otype != MAT_CLIP) { |
| 213 |
> |
if (istransp(m->otype) || isBSDFproxy(m)) { |
| 214 |
> |
raytrans(r); |
| 215 |
> |
return(1); |
| 216 |
> |
} |
| 217 |
> |
if (!islight(m->otype)) |
| 218 |
> |
return((*ofun[Lamb.otype].funp)(&Lamb, r)); |
| 219 |
|
} |
| 220 |
+ |
return(0); /* not a qualifying surface */ |
| 221 |
|
} |
| 222 |
|
|
| 223 |
|
|
| 224 |
< |
extern int |
| 224 |
> |
int |
| 225 |
|
rayshade( /* shade ray r with material mod */ |
| 226 |
|
RAY *r, |
| 227 |
|
int mod |
| 228 |
|
) |
| 229 |
|
{ |
| 230 |
+ |
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
| 231 |
|
OBJREC *m; |
| 232 |
|
|
| 233 |
< |
r->rt = r->rot; /* set effective ray length */ |
| 233 |
> |
r->rxt = r->rot; /* preset effective ray length */ |
| 234 |
|
for ( ; mod != OVOID; mod = m->omod) { |
| 235 |
|
m = objptr(mod); |
| 236 |
|
/****** unnecessary test since modifier() is always called |
| 240 |
|
} |
| 241 |
|
******/ |
| 242 |
|
/* hack for irradiance calculation */ |
| 243 |
< |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
| 244 |
< |
m->otype != MAT_CLIP && |
| 245 |
< |
(ofun[m->otype].flags & (T_M|T_X))) { |
| 214 |
< |
if (irr_ignore(m->otype)) { |
| 215 |
< |
raytrans(r); |
| 216 |
< |
return(1); |
| 217 |
< |
} |
| 218 |
< |
if (!islight(m->otype)) |
| 219 |
< |
m = &Lamb; |
| 220 |
< |
} |
| 243 |
> |
if (tst_irrad && raytirrad(m, r)) |
| 244 |
> |
return(1); |
| 245 |
> |
|
| 246 |
|
if ((*ofun[m->otype].funp)(m, r)) |
| 247 |
|
return(1); /* materials call raytexture() */ |
| 248 |
|
} |
| 250 |
|
} |
| 251 |
|
|
| 252 |
|
|
| 253 |
< |
extern void |
| 253 |
> |
void |
| 254 |
|
rayparticipate( /* compute ray medium participation */ |
| 255 |
|
RAY *r |
| 256 |
|
) |
| 274 |
|
multcolor(r->rcol, ce); /* path extinction */ |
| 275 |
|
if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
| 276 |
|
return; /* no scattering */ |
| 277 |
< |
setcolor(ca, |
| 278 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
| 279 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
| 280 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
| 281 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
| 277 |
> |
|
| 278 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
| 279 |
> |
if (!volumePhotonMapping) { |
| 280 |
> |
setcolor(ca, |
| 281 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
| 282 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
| 283 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
| 284 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
| 285 |
> |
} |
| 286 |
> |
|
| 287 |
|
srcscatter(r); /* source in scattering */ |
| 288 |
|
} |
| 289 |
|
|
| 290 |
|
|
| 291 |
< |
extern void |
| 291 |
> |
void |
| 292 |
|
raytexture( /* get material modifiers */ |
| 293 |
|
RAY *r, |
| 294 |
|
OBJECT mod |
| 313 |
|
} |
| 314 |
|
|
| 315 |
|
|
| 316 |
< |
extern int |
| 316 |
> |
int |
| 317 |
|
raymixture( /* mix modifiers */ |
| 318 |
|
RAY *r, |
| 319 |
|
OBJECT fore, |
| 322 |
|
) |
| 323 |
|
{ |
| 324 |
|
RAY fr, br; |
| 325 |
+ |
double mfore, mback; |
| 326 |
|
int foremat, backmat; |
| 327 |
|
int i; |
| 328 |
|
/* bound coefficient */ |
| 369 |
|
scalecolor(br.rcol, 1.0-coef); |
| 370 |
|
copycolor(r->rcol, fr.rcol); |
| 371 |
|
addcolor(r->rcol, br.rcol); |
| 372 |
< |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
| 372 |
> |
scalecolor(fr.mcol, coef); |
| 373 |
> |
scalecolor(br.mcol, 1.0-coef); |
| 374 |
> |
copycolor(r->mcol, fr.mcol); |
| 375 |
> |
addcolor(r->mcol, br.mcol); |
| 376 |
> |
mfore = bright(fr.mcol); mback = bright(br.mcol); |
| 377 |
> |
r->rmt = mfore > mback ? fr.rmt : br.rmt; |
| 378 |
> |
r->rxt = bright(fr.rcol)-mfore > bright(br.rcol)-mback ? |
| 379 |
> |
fr.rxt : br.rxt; |
| 380 |
|
return(1); |
| 381 |
|
} |
| 382 |
|
|
| 383 |
|
|
| 384 |
< |
extern double |
| 384 |
> |
double |
| 385 |
|
raydist( /* compute (cumulative) ray distance */ |
| 386 |
|
const RAY *r, |
| 387 |
|
int flags |
| 397 |
|
} |
| 398 |
|
|
| 399 |
|
|
| 400 |
< |
extern void |
| 400 |
> |
void |
| 401 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
| 402 |
|
RREAL rc[3], |
| 403 |
|
const RAY *r, |
| 404 |
|
int flags |
| 405 |
|
) |
| 406 |
|
{ |
| 407 |
< |
double eext[3]; |
| 370 |
< |
int i; |
| 407 |
> |
static int warnedPM = 0; |
| 408 |
|
|
| 372 |
– |
eext[0] = eext[1] = eext[2] = 0.; |
| 409 |
|
rc[0] = rc[1] = rc[2] = 1.; |
| 410 |
|
|
| 411 |
|
while (r != NULL && r->crtype&flags) { |
| 412 |
< |
for (i = 3; i--; ) { |
| 412 |
> |
int i = 3; |
| 413 |
> |
while (i--) |
| 414 |
|
rc[i] *= colval(r->rcoef,i); |
| 415 |
< |
eext[i] += r->rot * colval(r->cext,i); |
| 415 |
> |
/* check for participating medium */ |
| 416 |
> |
if (!warnedPM && (bright(r->cext) > FTINY) | |
| 417 |
> |
(bright(r->albedo) > FTINY)) { |
| 418 |
> |
error(WARNING, |
| 419 |
> |
"ray contribution calculation does not support participating media"); |
| 420 |
> |
warnedPM++; |
| 421 |
|
} |
| 422 |
|
r = r->parent; |
| 423 |
|
} |
| 382 |
– |
for (i = 3; i--; ) |
| 383 |
– |
rc[i] *= (eext[i] <= FTINY) ? 1. : |
| 384 |
– |
(eext[i] > 92.) ? 0. : exp(-eext[i]); |
| 424 |
|
} |
| 425 |
|
|
| 426 |
|
|
| 427 |
< |
extern double |
| 427 |
> |
double |
| 428 |
|
raynormal( /* compute perturbed normal for ray */ |
| 429 |
|
FVECT norm, |
| 430 |
|
RAY *r |
| 460 |
|
} |
| 461 |
|
|
| 462 |
|
|
| 463 |
< |
extern void |
| 463 |
> |
void |
| 464 |
|
newrayxf( /* get new tranformation matrix for ray */ |
| 465 |
|
RAY *r |
| 466 |
|
) |
| 498 |
|
} |
| 499 |
|
|
| 500 |
|
|
| 501 |
< |
extern void |
| 501 |
> |
void |
| 502 |
|
flipsurface( /* reverse surface orientation */ |
| 503 |
|
RAY *r |
| 504 |
|
) |
| 510 |
|
r->pert[0] = -r->pert[0]; |
| 511 |
|
r->pert[1] = -r->pert[1]; |
| 512 |
|
r->pert[2] = -r->pert[2]; |
| 513 |
+ |
r->rflips++; |
| 514 |
|
} |
| 515 |
|
|
| 516 |
|
|
| 517 |
< |
extern void |
| 517 |
> |
void |
| 518 |
|
rayhit( /* standard ray hit test */ |
| 519 |
|
OBJECT *oset, |
| 520 |
|
RAY *r |
| 531 |
|
} |
| 532 |
|
|
| 533 |
|
|
| 534 |
< |
extern int |
| 534 |
> |
int |
| 535 |
|
localhit( /* check for hit in the octree */ |
| 536 |
|
RAY *r, |
| 537 |
|
CUBE *scene |
