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 |
+ |
/* 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"); |
130 |
|
r->rweight = minweight; |
131 |
|
return(0); |
132 |
|
} |
133 |
< |
return(r->rlvl <= abs(maxdepth) && r->rweight >= minweight ? 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 |
< |
register RAY *r |
139 |
> |
RAY *r |
140 |
|
) |
141 |
|
{ |
142 |
|
r->rno = raynum++; |
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->uv[0] = r->uv[1] = 0.0; |
151 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
152 |
+ |
setcolor(r->mcol, 0.0, 0.0, 0.0); |
153 |
|
setcolor(r->rcol, 0.0, 0.0, 0.0); |
154 |
|
} |
155 |
|
|
156 |
|
|
157 |
< |
extern void |
157 |
> |
void |
158 |
|
raytrace( /* trace a ray and compute its value */ |
159 |
|
RAY *r |
160 |
|
) |
174 |
|
} |
175 |
|
|
176 |
|
|
177 |
< |
extern void |
177 |
> |
void |
178 |
|
raycont( /* check for clipped object and continue */ |
179 |
< |
register RAY *r |
179 |
> |
RAY *r |
180 |
|
) |
181 |
|
{ |
182 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
185 |
|
} |
186 |
|
|
187 |
|
|
188 |
< |
extern void |
188 |
> |
void |
189 |
|
raytrans( /* transmit ray as is */ |
190 |
< |
register RAY *r |
190 |
> |
RAY *r |
191 |
|
) |
192 |
|
{ |
193 |
|
RAY tr; |
194 |
|
|
195 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
196 |
< |
VCOPY(tr.rdir, r->rdir); |
197 |
< |
rayvalue(&tr); |
198 |
< |
copycolor(r->rcol, tr.rcol); |
199 |
< |
r->rt = r->rot + tr.rt; |
195 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
196 |
> |
VCOPY(tr.rdir, r->rdir); |
197 |
> |
rayvalue(&tr); |
198 |
> |
copycolor(r->rcol, tr.rcol); |
199 |
> |
r->rmt = r->rot + tr.rmt; |
200 |
> |
r->rxt = r->rot + tr.rxt; |
201 |
> |
} |
202 |
> |
|
203 |
> |
|
204 |
> |
int |
205 |
> |
raytirrad( /* irradiance hack */ |
206 |
> |
OBJREC *m, |
207 |
> |
RAY *r |
208 |
> |
) |
209 |
> |
{ |
210 |
> |
if ((ofun[m->otype].flags & (T_M|T_X)) && m->otype != MAT_CLIP) { |
211 |
> |
if (istransp(m->otype) || isBSDFproxy(m)) { |
212 |
> |
raytrans(r); |
213 |
> |
return(1); |
214 |
> |
} |
215 |
> |
if (!islight(m->otype)) |
216 |
> |
return((*ofun[Lamb.otype].funp)(&Lamb, r)); |
217 |
|
} |
218 |
+ |
return(0); /* not a qualifying surface */ |
219 |
|
} |
220 |
|
|
221 |
|
|
222 |
< |
extern int |
222 |
> |
int |
223 |
|
rayshade( /* shade ray r with material mod */ |
224 |
< |
register RAY *r, |
224 |
> |
RAY *r, |
225 |
|
int mod |
226 |
|
) |
227 |
|
{ |
228 |
< |
register OBJREC *m; |
228 |
> |
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
229 |
> |
OBJREC *m; |
230 |
|
|
231 |
< |
r->rt = r->rot; /* set effective ray length */ |
231 |
> |
r->rxt = r->rmt = r->rot; /* preset effective ray length */ |
232 |
|
for ( ; mod != OVOID; mod = m->omod) { |
233 |
|
m = objptr(mod); |
234 |
|
/****** unnecessary test since modifier() is always called |
238 |
|
} |
239 |
|
******/ |
240 |
|
/* hack for irradiance calculation */ |
241 |
< |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
242 |
< |
m->otype != MAT_CLIP && |
243 |
< |
(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 |
< |
} |
241 |
> |
if (tst_irrad && raytirrad(m, r)) |
242 |
> |
return(1); |
243 |
> |
|
244 |
|
if ((*ofun[m->otype].funp)(m, r)) |
245 |
|
return(1); /* materials call raytexture() */ |
246 |
|
} |
248 |
|
} |
249 |
|
|
250 |
|
|
251 |
< |
extern void |
251 |
> |
void |
252 |
|
rayparticipate( /* compute ray medium participation */ |
253 |
< |
register RAY *r |
253 |
> |
RAY *r |
254 |
|
) |
255 |
|
{ |
256 |
|
COLOR ce, ca; |
272 |
|
multcolor(r->rcol, ce); /* path extinction */ |
273 |
|
if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
274 |
|
return; /* no scattering */ |
275 |
< |
setcolor(ca, |
276 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
277 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
278 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
279 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
275 |
> |
|
276 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
277 |
> |
if (!volumePhotonMapping) { |
278 |
> |
setcolor(ca, |
279 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
280 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
281 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
282 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
283 |
> |
} |
284 |
> |
|
285 |
|
srcscatter(r); /* source in scattering */ |
286 |
|
} |
287 |
|
|
288 |
|
|
289 |
< |
extern void |
289 |
> |
void |
290 |
|
raytexture( /* get material modifiers */ |
291 |
|
RAY *r, |
292 |
|
OBJECT mod |
293 |
|
) |
294 |
|
{ |
295 |
< |
register OBJREC *m; |
295 |
> |
OBJREC *m; |
296 |
|
/* execute textures and patterns */ |
297 |
|
for ( ; mod != OVOID; mod = m->omod) { |
298 |
|
m = objptr(mod); |
311 |
|
} |
312 |
|
|
313 |
|
|
314 |
< |
extern int |
314 |
> |
int |
315 |
|
raymixture( /* mix modifiers */ |
316 |
< |
register RAY *r, |
316 |
> |
RAY *r, |
317 |
|
OBJECT fore, |
318 |
|
OBJECT back, |
319 |
|
double coef |
320 |
|
) |
321 |
|
{ |
322 |
|
RAY fr, br; |
323 |
+ |
double mfore, mback; |
324 |
|
int foremat, backmat; |
325 |
< |
register int i; |
325 |
> |
int i; |
326 |
|
/* bound coefficient */ |
327 |
|
if (coef > 1.0) |
328 |
|
coef = 1.0; |
367 |
|
scalecolor(br.rcol, 1.0-coef); |
368 |
|
copycolor(r->rcol, fr.rcol); |
369 |
|
addcolor(r->rcol, br.rcol); |
370 |
< |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
370 |
> |
mfore = bright(fr.mcol); mback = bright(br.mcol); |
371 |
> |
r->rmt = mfore > mback ? fr.rmt : br.rmt; |
372 |
> |
r->rxt = bright(fr.rcol)-mfore > bright(br.rcol)-mback ? |
373 |
> |
fr.rxt : br.rxt; |
374 |
|
return(1); |
375 |
|
} |
376 |
|
|
377 |
|
|
378 |
< |
extern double |
378 |
> |
double |
379 |
|
raydist( /* compute (cumulative) ray distance */ |
380 |
< |
register const RAY *r, |
381 |
< |
register int flags |
380 |
> |
const RAY *r, |
381 |
> |
int flags |
382 |
|
) |
383 |
|
{ |
384 |
|
double sum = 0.0; |
391 |
|
} |
392 |
|
|
393 |
|
|
394 |
< |
extern void |
394 |
> |
void |
395 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
396 |
< |
double rc[3], |
396 |
> |
RREAL rc[3], |
397 |
|
const RAY *r, |
398 |
|
int flags |
399 |
|
) |
417 |
|
} |
418 |
|
|
419 |
|
|
420 |
< |
extern double |
420 |
> |
double |
421 |
|
raynormal( /* compute perturbed normal for ray */ |
422 |
|
FVECT norm, |
423 |
< |
register RAY *r |
423 |
> |
RAY *r |
424 |
|
) |
425 |
|
{ |
426 |
|
double newdot; |
427 |
< |
register int i; |
427 |
> |
int i; |
428 |
|
|
429 |
|
/* The perturbation is added to the surface normal to obtain |
430 |
|
* the new normal. If the new normal would affect the surface |
453 |
|
} |
454 |
|
|
455 |
|
|
456 |
< |
extern void |
456 |
> |
void |
457 |
|
newrayxf( /* get new tranformation matrix for ray */ |
458 |
|
RAY *r |
459 |
|
) |
462 |
|
struct xfn *next; |
463 |
|
FULLXF xf; |
464 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
465 |
< |
register struct xfn *xp; |
466 |
< |
register const RAY *rp; |
465 |
> |
struct xfn *xp; |
466 |
> |
const RAY *rp; |
467 |
|
|
468 |
|
/* |
469 |
|
* Search for transform in circular list that |
474 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
475 |
|
xp = xp->next; /* move to next */ |
476 |
|
if (xp == xflast) { /* need new one */ |
477 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
477 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
478 |
|
if (xp == NULL) |
479 |
|
error(SYSTEM, |
480 |
|
"out of memory in newrayxf"); |
491 |
|
} |
492 |
|
|
493 |
|
|
494 |
< |
extern void |
494 |
> |
void |
495 |
|
flipsurface( /* reverse surface orientation */ |
496 |
< |
register RAY *r |
496 |
> |
RAY *r |
497 |
|
) |
498 |
|
{ |
499 |
|
r->rod = -r->rod; |
506 |
|
} |
507 |
|
|
508 |
|
|
509 |
< |
extern void |
509 |
> |
void |
510 |
|
rayhit( /* standard ray hit test */ |
511 |
|
OBJECT *oset, |
512 |
|
RAY *r |
523 |
|
} |
524 |
|
|
525 |
|
|
526 |
< |
extern int |
526 |
> |
int |
527 |
|
localhit( /* check for hit in the octree */ |
528 |
< |
register RAY *r, |
529 |
< |
register CUBE *scene |
528 |
> |
RAY *r, |
529 |
> |
CUBE *scene |
530 |
|
) |
531 |
|
{ |
532 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
533 |
|
FVECT curpos; /* current cube position */ |
534 |
|
int sflags; /* sign flags */ |
535 |
|
double t, dt; |
536 |
< |
register int i; |
536 |
> |
int i; |
537 |
|
|
538 |
|
nrays++; /* increment trace counter */ |
539 |
|
sflags = 0; |
552 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
553 |
|
r->ro = &Aftplane; |
554 |
|
r->rot = r->rmax; |
555 |
< |
for (i = 0; i < 3; i++) |
524 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
555 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
556 |
|
} |
557 |
|
/* find global cube entrance point */ |
558 |
|
t = 0.0; |
575 |
|
if (t >= r->rot) /* clipped already */ |
576 |
|
return(0); |
577 |
|
/* advance position */ |
578 |
< |
for (i = 0; i < 3; i++) |
548 |
< |
curpos[i] += r->rdir[i]*t; |
578 |
> |
VSUM(curpos, curpos, r->rdir, t); |
579 |
|
|
580 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
581 |
|
return(0); |
591 |
|
FVECT pos, /* current position, modified herein */ |
592 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
593 |
|
int dirf, /* direction indicators to speed tests */ |
594 |
< |
register RAY *r, |
595 |
< |
register CUBE *cu |
594 |
> |
RAY *r, |
595 |
> |
CUBE *cu |
596 |
|
) |
597 |
|
{ |
598 |
|
int ax; |
600 |
|
|
601 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
602 |
|
CUBE cukid; |
603 |
< |
register int br, sgn; |
603 |
> |
int br, sgn; |
604 |
|
|
605 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
606 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
666 |
|
ax = 2; |
667 |
|
} |
668 |
|
} |
669 |
< |
pos[0] += r->rdir[0]*t; |
640 |
< |
pos[1] += r->rdir[1]*t; |
641 |
< |
pos[2] += r->rdir[2]*t; |
669 |
> |
VSUM(pos, pos, r->rdir, t); |
670 |
|
return(ax); |
671 |
|
} |
672 |
|
|
673 |
|
|
674 |
|
static int |
675 |
|
checkhit( /* check for hit in full cube */ |
676 |
< |
register RAY *r, |
676 |
> |
RAY *r, |
677 |
|
CUBE *cu, |
678 |
|
OBJECT *cxs |
679 |
|
) |
694 |
|
|
695 |
|
static void |
696 |
|
checkset( /* modify checked set and set to check */ |
697 |
< |
register OBJECT *os, /* os' = os - cs */ |
698 |
< |
register OBJECT *cs /* cs' = cs + os */ |
697 |
> |
OBJECT *os, /* os' = os - cs */ |
698 |
> |
OBJECT *cs /* cs' = cs + os */ |
699 |
|
) |
700 |
|
{ |
701 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
702 |
< |
register int i, j; |
702 |
> |
int i, j; |
703 |
|
int k; |
704 |
|
/* copy os in place, cset <- cs */ |
705 |
|
cset[0] = 0; |