| 8 |
|
*/ |
| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
– |
|
| 11 |
|
#include "otypes.h" |
| 12 |
< |
|
| 12 |
> |
#include "rtotypes.h" |
| 13 |
|
#include "source.h" |
| 15 |
– |
|
| 14 |
|
#include "random.h" |
| 15 |
|
|
| 16 |
|
extern double ssampdist; /* scatter sampling distance */ |
| 39 |
|
static CNTPTR *cntord; /* source ordering in direct() */ |
| 40 |
|
static int maxcntr = 0; /* size of contribution arrays */ |
| 41 |
|
|
| 42 |
+ |
static int cntcmp(const void *p1, const void *p2); |
| 43 |
|
|
| 44 |
< |
OBJREC * /* find an object's actual material */ |
| 44 |
> |
|
| 45 |
> |
extern OBJREC * /* find an object's actual material */ |
| 46 |
|
findmaterial(register OBJREC *o) |
| 47 |
|
{ |
| 48 |
|
while (!ismaterial(o->otype)) { |
| 49 |
– |
if (ismixture(o->otype)) |
| 50 |
– |
return(NULL); /* reject mixed materials */ |
| 49 |
|
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
| 50 |
|
OBJECT aobj; |
| 51 |
|
OBJREC *ao; |
| 60 |
|
return(NULL); |
| 61 |
|
o = objptr(o->omod); |
| 62 |
|
} |
| 63 |
< |
return(o); |
| 63 |
> |
return(o); /* mixtures will return NULL */ |
| 64 |
|
} |
| 65 |
|
|
| 66 |
|
|
| 67 |
< |
void |
| 68 |
< |
marksources() /* find and mark source objects */ |
| 67 |
> |
extern void |
| 68 |
> |
marksources(void) /* find and mark source objects */ |
| 69 |
|
{ |
| 70 |
|
int foundsource = 0; |
| 71 |
|
int i; |
| 81 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
| 82 |
|
continue; |
| 83 |
|
/* find material */ |
| 84 |
< |
m = findmaterial(o); |
| 84 |
> |
m = findmaterial(objptr(o->omod)); |
| 85 |
|
if (m == NULL || !islight(m->otype)) |
| 86 |
|
continue; /* not source modifier */ |
| 87 |
|
|
| 123 |
|
} |
| 124 |
|
} |
| 125 |
|
#if SHADCACHE |
| 126 |
< |
source[ns].obscache = NULL; |
| 126 |
> |
initobscache(ns); |
| 127 |
|
#endif |
| 128 |
|
if (!(source[ns].sflags & SSKIP)) |
| 129 |
|
foundsource++; |
| 145 |
|
} |
| 146 |
|
|
| 147 |
|
|
| 148 |
< |
void |
| 149 |
< |
freesources() /* free all source structures */ |
| 148 |
> |
extern void |
| 149 |
> |
freesources(void) /* free all source structures */ |
| 150 |
|
{ |
| 151 |
|
if (nsources > 0) { |
| 152 |
|
#if SHADCACHE |
| 167 |
|
} |
| 168 |
|
|
| 169 |
|
|
| 170 |
< |
int |
| 170 |
> |
extern int |
| 171 |
|
srcray( /* send a ray to a source, return domega */ |
| 172 |
< |
register RAY *sr, /* returned source ray */ |
| 173 |
< |
RAY *r, /* ray which hit object */ |
| 174 |
< |
SRCINDEX *si /* source sample index */ |
| 172 |
> |
register RAY *sr, /* returned source ray */ |
| 173 |
> |
RAY *r, /* ray which hit object */ |
| 174 |
> |
SRCINDEX *si /* source sample index */ |
| 175 |
|
) |
| 176 |
|
{ |
| 177 |
|
double d; /* distance to source */ |
| 206 |
|
} |
| 207 |
|
|
| 208 |
|
|
| 209 |
< |
void |
| 209 |
> |
extern void |
| 210 |
|
srcvalue( /* punch ray to source and compute value */ |
| 211 |
< |
register RAY *r |
| 211 |
> |
register RAY *r |
| 212 |
|
) |
| 213 |
|
{ |
| 214 |
|
register SRCREC *sp; |
| 248 |
|
} |
| 249 |
|
|
| 250 |
|
|
| 251 |
< |
int |
| 251 |
> |
static int |
| 252 |
> |
transillum( /* check if material is transparent illum */ |
| 253 |
> |
OBJECT obj |
| 254 |
> |
) |
| 255 |
> |
{ |
| 256 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
| 257 |
> |
|
| 258 |
> |
if (m == NULL) |
| 259 |
> |
return(1); |
| 260 |
> |
if (m->otype != MAT_ILLUM) |
| 261 |
> |
return(0); |
| 262 |
> |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
| 263 |
> |
} |
| 264 |
> |
|
| 265 |
> |
|
| 266 |
> |
extern int |
| 267 |
|
sourcehit( /* check to see if ray hit distant source */ |
| 268 |
< |
register RAY *r |
| 268 |
> |
register RAY *r |
| 269 |
|
) |
| 270 |
|
{ |
| 271 |
+ |
int glowsrc = -1; |
| 272 |
+ |
int transrc = -1; |
| 273 |
|
int first, last; |
| 274 |
|
register int i; |
| 275 |
|
|
| 278 |
|
} else { /* otherwise check all */ |
| 279 |
|
first = 0; last = nsources-1; |
| 280 |
|
} |
| 281 |
< |
for (i = first; i <= last; i++) |
| 282 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
| 283 |
< |
/* |
| 284 |
< |
* Check to see if ray is within |
| 285 |
< |
* solid angle of source. |
| 286 |
< |
*/ |
| 287 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
| 288 |
< |
<= source[i].ss2) { |
| 289 |
< |
r->ro = source[i].so; |
| 290 |
< |
if (!(source[i].sflags & SSKIP)) |
| 291 |
< |
break; |
| 292 |
< |
} |
| 293 |
< |
|
| 294 |
< |
if (r->ro != NULL) { |
| 295 |
< |
r->robj = objndx(r->ro); |
| 296 |
< |
for (i = 0; i < 3; i++) |
| 297 |
< |
r->ron[i] = -r->rdir[i]; |
| 298 |
< |
r->rod = 1.0; |
| 299 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 300 |
< |
r->uv[0] = r->uv[1] = 0.0; |
| 301 |
< |
r->rox = NULL; |
| 302 |
< |
return(1); |
| 281 |
> |
for (i = first; i <= last; i++) { |
| 282 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
| 283 |
> |
continue; |
| 284 |
> |
/* |
| 285 |
> |
* Check to see if ray is within |
| 286 |
> |
* solid angle of source. |
| 287 |
> |
*/ |
| 288 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
| 289 |
> |
continue; |
| 290 |
> |
/* is it the only possibility? */ |
| 291 |
> |
if (first == last) { |
| 292 |
> |
r->ro = source[i].so; |
| 293 |
> |
break; |
| 294 |
> |
} |
| 295 |
> |
/* |
| 296 |
> |
* If it's a glow or transparent illum, just remember it. |
| 297 |
> |
*/ |
| 298 |
> |
if (source[i].sflags & SSKIP) { |
| 299 |
> |
glowsrc = i; |
| 300 |
> |
continue; |
| 301 |
> |
} |
| 302 |
> |
if (transillum(source[i].so->omod)) { |
| 303 |
> |
transrc = i; |
| 304 |
> |
continue; |
| 305 |
> |
} |
| 306 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
| 307 |
> |
break; |
| 308 |
|
} |
| 309 |
< |
return(0); |
| 309 |
> |
/* |
| 310 |
> |
* Do we need fallback? |
| 311 |
> |
*/ |
| 312 |
> |
if (r->ro == NULL) { |
| 313 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
| 314 |
> |
return(0); /* avoid overcounting */ |
| 315 |
> |
if (glowsrc >= 0) |
| 316 |
> |
r->ro = source[glowsrc].so; |
| 317 |
> |
else |
| 318 |
> |
return(0); /* nothing usable */ |
| 319 |
> |
} |
| 320 |
> |
/* |
| 321 |
> |
* Make assignments. |
| 322 |
> |
*/ |
| 323 |
> |
r->robj = objndx(r->ro); |
| 324 |
> |
for (i = 0; i < 3; i++) |
| 325 |
> |
r->ron[i] = -r->rdir[i]; |
| 326 |
> |
r->rod = 1.0; |
| 327 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 328 |
> |
r->uv[0] = r->uv[1] = 0.0; |
| 329 |
> |
r->rox = NULL; |
| 330 |
> |
return(1); |
| 331 |
|
} |
| 332 |
|
|
| 333 |
|
|
| 334 |
|
static int |
| 335 |
|
cntcmp( /* contribution compare (descending) */ |
| 336 |
< |
const void *p1, |
| 337 |
< |
const void *p2 |
| 336 |
> |
const void *p1, |
| 337 |
> |
const void *p2 |
| 338 |
|
) |
| 339 |
|
{ |
| 340 |
|
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
| 348 |
|
} |
| 349 |
|
|
| 350 |
|
|
| 351 |
< |
void |
| 351 |
> |
extern void |
| 352 |
|
direct( /* add direct component */ |
| 353 |
< |
RAY *r, /* ray that hit surface */ |
| 354 |
< |
void (*f)(), /* direct component coefficient function */ |
| 355 |
< |
char *p /* data for f */ |
| 353 |
> |
RAY *r, /* ray that hit surface */ |
| 354 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
| 355 |
> |
void *p /* data for f */ |
| 356 |
|
) |
| 357 |
|
{ |
| 317 |
– |
extern void (*trace)(); |
| 358 |
|
register int sn; |
| 359 |
|
register CONTRIB *scp; |
| 360 |
|
SRCINDEX si; |
| 455 |
|
if (bright(sr.rcol) <= FTINY) { |
| 456 |
|
#if SHADCACHE |
| 457 |
|
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
| 458 |
< |
&& (scp >= srccnt+ncnts || |
| 458 |
> |
&& (scp >= srccnt+ncnts-1 || |
| 459 |
|
scp[1].sno != scp->sno)) |
| 460 |
|
srcblocker(&sr); |
| 461 |
|
#endif |
| 492 |
|
} |
| 493 |
|
|
| 494 |
|
|
| 495 |
< |
void |
| 495 |
> |
extern void |
| 496 |
|
srcscatter( /* compute source scattering into ray */ |
| 497 |
< |
register RAY *r |
| 497 |
> |
register RAY *r |
| 498 |
|
) |
| 499 |
|
{ |
| 500 |
|
int oldsampndx; |
| 540 |
|
if (!srcray(&sr, NULL, &si) || |
| 541 |
|
sr.rsrc != r->slights[i]) |
| 542 |
|
continue; /* no path */ |
| 543 |
+ |
#if SHADCACHE |
| 544 |
+ |
if (srcblocked(&sr)) /* check shadow cache */ |
| 545 |
+ |
continue; |
| 546 |
+ |
#endif |
| 547 |
|
copycolor(sr.cext, r->cext); |
| 548 |
|
copycolor(sr.albedo, r->albedo); |
| 549 |
|
sr.gecc = r->gecc; |
| 550 |
|
sr.slights = r->slights; |
| 551 |
|
rayvalue(&sr); /* eval. source ray */ |
| 552 |
< |
if (bright(sr.rcol) <= FTINY) |
| 552 |
> |
if (bright(sr.rcol) <= FTINY) { |
| 553 |
> |
#if SHADCACHE |
| 554 |
> |
srcblocker(&sr); /* add blocker to cache */ |
| 555 |
> |
#endif |
| 556 |
|
continue; |
| 557 |
+ |
} |
| 558 |
|
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 559 |
|
d = 1.; |
| 560 |
|
else { |
| 592 |
|
*/ |
| 593 |
|
|
| 594 |
|
static int |
| 595 |
< |
weaksrcmat(int obj) /* identify material */ |
| 595 |
> |
weaksrcmat(OBJECT obj) /* identify material */ |
| 596 |
|
{ |
| 597 |
< |
register OBJREC *o = objptr(obj); |
| 597 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
| 598 |
|
|
| 599 |
< |
while (!ismaterial(o->otype)) /* find material */ |
| 600 |
< |
o = objptr(o->omod); |
| 553 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
| 599 |
> |
if (m == NULL) return(0); |
| 600 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
| 601 |
|
} |
| 602 |
|
|
| 603 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 658 |
|
distglow(m, r, raydist(r,PRIMARY))) |
| 659 |
|
|
| 660 |
|
|
| 661 |
< |
int |
| 661 |
> |
extern int |
| 662 |
|
m_light( /* ray hit a light source */ |
| 663 |
< |
register OBJREC *m, |
| 664 |
< |
register RAY *r |
| 663 |
> |
register OBJREC *m, |
| 664 |
> |
register RAY *r |
| 665 |
|
) |
| 666 |
|
{ |
| 667 |
|
/* check for over-counting */ |