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 |
|
|
21 |
< |
unsigned long raynum = 0; /* next unique ray number */ |
22 |
< |
unsigned long nrays = 0; /* number of calls to localhit */ |
21 |
> |
RNUMBER raynum = 0; /* next unique ray number */ |
22 |
> |
RNUMBER nrays = 0; /* number of calls to localhit */ |
23 |
|
|
24 |
|
static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
25 |
|
OBJREC Lamb = { |
26 |
|
OVOID, MAT_PLASTIC, "Lambertian", |
27 |
< |
{0, 5, NULL, Lambfa}, NULL, |
27 |
> |
{NULL, Lambfa, 0, 5}, NULL |
28 |
|
}; /* a Lambertian surface */ |
29 |
|
|
30 |
|
OBJREC Aftplane; /* aft clipping plane object */ |
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 |
|
} |
68 |
|
r->gecc = seccg; |
69 |
|
r->slights = NULL; |
70 |
|
} else { /* spawned ray */ |
71 |
< |
if (ro->rot >= FHUGE) { |
71 |
> |
if (ro->rot >= FHUGE*.99) { |
72 |
|
memset(r, 0, sizeof(RAY)); |
73 |
|
return(-1); /* illegal continuation */ |
74 |
|
} |
96 |
|
colval(ro->cext,RED) : colval(ro->cext,GRN); |
97 |
|
if (colval(ro->cext,BLU) < re) re = colval(ro->cext,BLU); |
98 |
|
re *= ro->rot; |
99 |
< |
if (re > 0.1) |
100 |
< |
if (re > 92.) |
99 |
> |
if (re > 0.1) { |
100 |
> |
if (re > 92.) { |
101 |
|
r->rweight = 0.0; |
102 |
< |
else |
102 |
> |
} else { |
103 |
|
r->rweight *= exp(-re); |
104 |
+ |
} |
105 |
+ |
} |
106 |
|
} |
107 |
|
rayclear(r); |
108 |
|
if (r->rweight <= 0.0) /* check for expiration */ |
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); |
126 |
< |
if (frandom() < r->rweight/minweight) |
126 |
> |
if (frandom() > r->rweight/minweight) |
127 |
|
return(-1); |
128 |
|
rw = minweight/r->rweight; /* promote survivor */ |
129 |
|
scalecolor(r->rcoef, rw); |
130 |
|
r->rweight = minweight; |
131 |
|
return(0); |
132 |
|
} |
133 |
< |
return(r->rlvl <= 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->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 |
< |
register RAY *r |
180 |
> |
RAY *r |
181 |
|
) |
182 |
|
{ |
183 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
186 |
|
} |
187 |
|
|
188 |
|
|
189 |
< |
extern void |
189 |
> |
void |
190 |
|
raytrans( /* transmit ray as is */ |
191 |
< |
register RAY *r |
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 |
< |
register RAY *r, |
226 |
> |
RAY *r, |
227 |
|
int mod |
228 |
|
) |
229 |
|
{ |
230 |
< |
register OBJREC *m; |
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))) { |
212 |
< |
if (irr_ignore(m->otype)) { |
213 |
< |
raytrans(r); |
214 |
< |
return(1); |
215 |
< |
} |
216 |
< |
if (!islight(m->otype)) |
217 |
< |
m = &Lamb; |
218 |
< |
} |
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 |
< |
register RAY *r |
255 |
> |
RAY *r |
256 |
|
) |
257 |
|
{ |
258 |
|
COLOR ce, ca; |
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 |
295 |
|
) |
296 |
|
{ |
297 |
< |
register OBJREC *m; |
297 |
> |
OBJREC *m; |
298 |
|
/* execute textures and patterns */ |
299 |
|
for ( ; mod != OVOID; mod = m->omod) { |
300 |
|
m = objptr(mod); |
313 |
|
} |
314 |
|
|
315 |
|
|
316 |
< |
extern int |
316 |
> |
int |
317 |
|
raymixture( /* mix modifiers */ |
318 |
< |
register RAY *r, |
318 |
> |
RAY *r, |
319 |
|
OBJECT fore, |
320 |
|
OBJECT back, |
321 |
|
double coef |
322 |
|
) |
323 |
|
{ |
324 |
|
RAY fr, br; |
325 |
+ |
double mfore, mback; |
326 |
|
int foremat, backmat; |
327 |
< |
register int i; |
327 |
> |
int i; |
328 |
|
/* bound coefficient */ |
329 |
|
if (coef > 1.0) |
330 |
|
coef = 1.0; |
334 |
|
foremat = backmat = 0; |
335 |
|
/* foreground */ |
336 |
|
fr = *r; |
337 |
< |
if (coef > FTINY) |
337 |
> |
if (coef > FTINY) { |
338 |
> |
fr.rweight *= coef; |
339 |
> |
scalecolor(fr.rcoef, coef); |
340 |
|
foremat = rayshade(&fr, fore); |
341 |
+ |
} |
342 |
|
/* background */ |
343 |
|
br = *r; |
344 |
< |
if (coef < 1.0-FTINY) |
344 |
> |
if (coef < 1.0-FTINY) { |
345 |
> |
br.rweight *= 1.0-coef; |
346 |
> |
scalecolor(br.rcoef, 1.0-coef); |
347 |
|
backmat = rayshade(&br, back); |
348 |
+ |
} |
349 |
|
/* check for transparency */ |
350 |
|
if (backmat ^ foremat) { |
351 |
|
if (backmat && coef > FTINY) |
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 |
< |
register const RAY *r, |
387 |
< |
register int flags |
386 |
> |
const RAY *r, |
387 |
> |
int flags |
388 |
|
) |
389 |
|
{ |
390 |
|
double sum = 0.0; |
397 |
|
} |
398 |
|
|
399 |
|
|
400 |
< |
extern void |
400 |
> |
void |
401 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
402 |
< |
double rc[3], |
402 |
> |
RREAL rc[3], |
403 |
|
const RAY *r, |
404 |
|
int flags |
405 |
|
) |
406 |
|
{ |
407 |
< |
double eext[3]; |
362 |
< |
int i; |
407 |
> |
static int warnedPM = 0; |
408 |
|
|
364 |
– |
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 |
|
} |
374 |
– |
for (i = 3; i--; ) |
375 |
– |
rc[i] *= (eext[i] <= FTINY) ? 1. : |
376 |
– |
(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 |
< |
register RAY *r |
430 |
> |
RAY *r |
431 |
|
) |
432 |
|
{ |
433 |
|
double newdot; |
434 |
< |
register int i; |
434 |
> |
int i; |
435 |
|
|
436 |
|
/* The perturbation is added to the surface normal to obtain |
437 |
|
* the new normal. If the new normal would affect the surface |
460 |
|
} |
461 |
|
|
462 |
|
|
463 |
< |
extern void |
463 |
> |
void |
464 |
|
newrayxf( /* get new tranformation matrix for ray */ |
465 |
|
RAY *r |
466 |
|
) |
469 |
|
struct xfn *next; |
470 |
|
FULLXF xf; |
471 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
472 |
< |
register struct xfn *xp; |
473 |
< |
register const RAY *rp; |
472 |
> |
struct xfn *xp; |
473 |
> |
const RAY *rp; |
474 |
|
|
475 |
|
/* |
476 |
|
* Search for transform in circular list that |
481 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
482 |
|
xp = xp->next; /* move to next */ |
483 |
|
if (xp == xflast) { /* need new one */ |
484 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
484 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
485 |
|
if (xp == NULL) |
486 |
|
error(SYSTEM, |
487 |
|
"out of memory in newrayxf"); |
498 |
|
} |
499 |
|
|
500 |
|
|
501 |
< |
extern void |
501 |
> |
void |
502 |
|
flipsurface( /* reverse surface orientation */ |
503 |
< |
register RAY *r |
503 |
> |
RAY *r |
504 |
|
) |
505 |
|
{ |
506 |
|
r->rod = -r->rod; |
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 |
< |
register RAY *r, |
537 |
< |
register CUBE *scene |
536 |
> |
RAY *r, |
537 |
> |
CUBE *scene |
538 |
|
) |
539 |
|
{ |
540 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
541 |
|
FVECT curpos; /* current cube position */ |
542 |
|
int sflags; /* sign flags */ |
543 |
|
double t, dt; |
544 |
< |
register int i; |
544 |
> |
int i; |
545 |
|
|
546 |
|
nrays++; /* increment trace counter */ |
547 |
|
sflags = 0; |
552 |
|
else if (r->rdir[i] < -1e-7) |
553 |
|
sflags |= 0x10 << i; |
554 |
|
} |
555 |
< |
if (sflags == 0) |
556 |
< |
error(CONSISTENCY, "zero ray direction in localhit"); |
555 |
> |
if (!sflags) { |
556 |
> |
error(WARNING, "zero ray direction in localhit"); |
557 |
> |
return(0); |
558 |
> |
} |
559 |
|
/* start off assuming nothing hit */ |
560 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
561 |
|
r->ro = &Aftplane; |
562 |
|
r->rot = r->rmax; |
563 |
< |
for (i = 0; i < 3; i++) |
514 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
563 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
564 |
|
} |
565 |
|
/* find global cube entrance point */ |
566 |
|
t = 0.0; |
583 |
|
if (t >= r->rot) /* clipped already */ |
584 |
|
return(0); |
585 |
|
/* advance position */ |
586 |
< |
for (i = 0; i < 3; i++) |
538 |
< |
curpos[i] += r->rdir[i]*t; |
586 |
> |
VSUM(curpos, curpos, r->rdir, t); |
587 |
|
|
588 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
589 |
|
return(0); |
599 |
|
FVECT pos, /* current position, modified herein */ |
600 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
601 |
|
int dirf, /* direction indicators to speed tests */ |
602 |
< |
register RAY *r, |
603 |
< |
register CUBE *cu |
602 |
> |
RAY *r, |
603 |
> |
CUBE *cu |
604 |
|
) |
605 |
|
{ |
606 |
|
int ax; |
608 |
|
|
609 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
610 |
|
CUBE cukid; |
611 |
< |
register int br, sgn; |
611 |
> |
int br, sgn; |
612 |
|
|
613 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
614 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
674 |
|
ax = 2; |
675 |
|
} |
676 |
|
} |
677 |
< |
pos[0] += r->rdir[0]*t; |
630 |
< |
pos[1] += r->rdir[1]*t; |
631 |
< |
pos[2] += r->rdir[2]*t; |
677 |
> |
VSUM(pos, pos, r->rdir, t); |
678 |
|
return(ax); |
679 |
|
} |
680 |
|
|
681 |
|
|
682 |
|
static int |
683 |
|
checkhit( /* check for hit in full cube */ |
684 |
< |
register RAY *r, |
684 |
> |
RAY *r, |
685 |
|
CUBE *cu, |
686 |
|
OBJECT *cxs |
687 |
|
) |
702 |
|
|
703 |
|
static void |
704 |
|
checkset( /* modify checked set and set to check */ |
705 |
< |
register OBJECT *os, /* os' = os - cs */ |
706 |
< |
register OBJECT *cs /* cs' = cs + os */ |
705 |
> |
OBJECT *os, /* os' = os - cs */ |
706 |
> |
OBJECT *cs /* cs' = cs + os */ |
707 |
|
) |
708 |
|
{ |
709 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
710 |
< |
register int i, j; |
710 |
> |
int i, j; |
711 |
|
int k; |
712 |
|
/* copy os in place, cset <- cs */ |
713 |
|
cset[0] = 0; |