14 |
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#include "otypes.h" |
15 |
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#include "otspecial.h" |
16 |
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#include "random.h" |
17 |
+ |
#include "pmap.h" |
18 |
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|
19 |
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#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
20 |
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|
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 |
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|
24 |
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static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
25 |
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OBJREC Lamb = { |
26 |
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OVOID, MAT_PLASTIC, "Lambertian", |
27 |
< |
{0, 5, NULL, Lambfa}, NULL, |
27 |
> |
{NULL, Lambfa, 0, 5}, NULL |
28 |
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}; /* a Lambertian surface */ |
29 |
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|
30 |
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OBJREC Aftplane; /* aft clipping plane object */ |
36 |
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static void checkset(OBJECT *os, OBJECT *cs); |
37 |
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|
38 |
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|
39 |
< |
extern int |
39 |
> |
int |
40 |
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rayorigin( /* start new ray from old one */ |
41 |
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RAY *r, |
42 |
|
int rt, |
51 |
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setcolor(r->rcoef, 1., 1., 1.); |
52 |
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} else { |
53 |
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rw = intens(rc); |
54 |
+ |
if (rw > 1.0) |
55 |
+ |
rw = 1.0; /* avoid calculation growth */ |
56 |
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if (rc != r->rcoef) |
57 |
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copycolor(r->rcoef, rc); |
58 |
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} |
96 |
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colval(ro->cext,RED) : colval(ro->cext,GRN); |
97 |
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if (colval(ro->cext,BLU) < re) re = colval(ro->cext,BLU); |
98 |
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re *= ro->rot; |
99 |
< |
if (re > 0.1) |
100 |
< |
if (re > 92.) |
99 |
> |
if (re > 0.1) { |
100 |
> |
if (re > 92.) { |
101 |
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r->rweight = 0.0; |
102 |
< |
else |
102 |
> |
} else { |
103 |
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r->rweight *= exp(-re); |
104 |
+ |
} |
105 |
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} |
106 |
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} |
107 |
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rayclear(r); |
108 |
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if (r->rweight <= 0.0) /* check for expiration */ |
109 |
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return(-1); |
110 |
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if (r->crtype & SHADOW) /* shadow commitment */ |
111 |
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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 |
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if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
120 |
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if (minweight <= 0.0) |
121 |
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error(USER, "zero ray weight in Russian roulette"); |
130 |
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r->rweight = minweight; |
131 |
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return(0); |
132 |
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} |
133 |
< |
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
133 |
> |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
134 |
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} |
135 |
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|
136 |
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|
137 |
< |
extern void |
137 |
> |
void |
138 |
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rayclear( /* clear a ray for (re)evaluation */ |
139 |
< |
register RAY *r |
139 |
> |
RAY *r |
140 |
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) |
141 |
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{ |
142 |
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r->rno = raynum++; |
153 |
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} |
154 |
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|
155 |
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|
156 |
< |
extern void |
156 |
> |
void |
157 |
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raytrace( /* trace a ray and compute its value */ |
158 |
|
RAY *r |
159 |
|
) |
173 |
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} |
174 |
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|
175 |
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|
176 |
< |
extern void |
176 |
> |
void |
177 |
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raycont( /* check for clipped object and continue */ |
178 |
< |
register RAY *r |
178 |
> |
RAY *r |
179 |
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) |
180 |
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{ |
181 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
184 |
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} |
185 |
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|
186 |
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|
187 |
< |
extern void |
187 |
> |
void |
188 |
|
raytrans( /* transmit ray as is */ |
189 |
< |
register RAY *r |
189 |
> |
RAY *r |
190 |
|
) |
191 |
|
{ |
192 |
|
RAY tr; |
193 |
|
|
194 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
195 |
< |
VCOPY(tr.rdir, r->rdir); |
196 |
< |
rayvalue(&tr); |
197 |
< |
copycolor(r->rcol, tr.rcol); |
198 |
< |
r->rt = r->rot + tr.rt; |
187 |
< |
} |
194 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
195 |
> |
VCOPY(tr.rdir, r->rdir); |
196 |
> |
rayvalue(&tr); |
197 |
> |
copycolor(r->rcol, tr.rcol); |
198 |
> |
r->rt = r->rot + tr.rt; |
199 |
|
} |
200 |
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|
201 |
|
|
202 |
< |
extern int |
202 |
> |
int |
203 |
|
rayshade( /* shade ray r with material mod */ |
204 |
< |
register RAY *r, |
204 |
> |
RAY *r, |
205 |
|
int mod |
206 |
|
) |
207 |
|
{ |
208 |
< |
register OBJREC *m; |
208 |
> |
OBJREC *m; |
209 |
|
|
210 |
< |
r->rt = r->rot; /* set effective ray length */ |
210 |
> |
r->rt = r->rot; /* preset effective ray length */ |
211 |
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for ( ; mod != OVOID; mod = m->omod) { |
212 |
|
m = objptr(mod); |
213 |
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/****** unnecessary test since modifier() is always called |
218 |
|
******/ |
219 |
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/* hack for irradiance calculation */ |
220 |
|
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
221 |
< |
m->otype != MAT_CLIP && |
222 |
< |
(ofun[m->otype].flags & (T_M|T_X))) { |
223 |
< |
if (irr_ignore(m->otype)) { |
221 |
> |
(ofun[m->otype].flags & (T_M|T_X)) && |
222 |
> |
m->otype != MAT_CLIP) { |
223 |
> |
if (istransp(m->otype) || isBSDFproxy(m)) { |
224 |
|
raytrans(r); |
225 |
|
return(1); |
226 |
|
} |
234 |
|
} |
235 |
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|
236 |
|
|
237 |
< |
extern void |
237 |
> |
void |
238 |
|
rayparticipate( /* compute ray medium participation */ |
239 |
< |
register RAY *r |
239 |
> |
RAY *r |
240 |
|
) |
241 |
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{ |
242 |
|
COLOR ce, ca; |
258 |
|
multcolor(r->rcol, ce); /* path extinction */ |
259 |
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if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
260 |
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return; /* no scattering */ |
261 |
< |
setcolor(ca, |
262 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
263 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
264 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
265 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
261 |
> |
|
262 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
263 |
> |
if (!volumePhotonMapping) { |
264 |
> |
setcolor(ca, |
265 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
266 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
267 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
268 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
269 |
> |
} |
270 |
> |
|
271 |
|
srcscatter(r); /* source in scattering */ |
272 |
|
} |
273 |
|
|
274 |
|
|
275 |
< |
extern void |
275 |
> |
void |
276 |
|
raytexture( /* get material modifiers */ |
277 |
|
RAY *r, |
278 |
|
OBJECT mod |
279 |
|
) |
280 |
|
{ |
281 |
< |
register OBJREC *m; |
281 |
> |
OBJREC *m; |
282 |
|
/* execute textures and patterns */ |
283 |
|
for ( ; mod != OVOID; mod = m->omod) { |
284 |
|
m = objptr(mod); |
297 |
|
} |
298 |
|
|
299 |
|
|
300 |
< |
extern int |
300 |
> |
int |
301 |
|
raymixture( /* mix modifiers */ |
302 |
< |
register RAY *r, |
302 |
> |
RAY *r, |
303 |
|
OBJECT fore, |
304 |
|
OBJECT back, |
305 |
|
double coef |
307 |
|
{ |
308 |
|
RAY fr, br; |
309 |
|
int foremat, backmat; |
310 |
< |
register int i; |
310 |
> |
int i; |
311 |
|
/* bound coefficient */ |
312 |
|
if (coef > 1.0) |
313 |
|
coef = 1.0; |
318 |
|
/* foreground */ |
319 |
|
fr = *r; |
320 |
|
if (coef > FTINY) { |
321 |
+ |
fr.rweight *= coef; |
322 |
|
scalecolor(fr.rcoef, coef); |
323 |
|
foremat = rayshade(&fr, fore); |
324 |
|
} |
325 |
|
/* background */ |
326 |
|
br = *r; |
327 |
|
if (coef < 1.0-FTINY) { |
328 |
+ |
br.rweight *= 1.0-coef; |
329 |
|
scalecolor(br.rcoef, 1.0-coef); |
330 |
|
backmat = rayshade(&br, back); |
331 |
|
} |
357 |
|
} |
358 |
|
|
359 |
|
|
360 |
< |
extern double |
360 |
> |
double |
361 |
|
raydist( /* compute (cumulative) ray distance */ |
362 |
< |
register const RAY *r, |
363 |
< |
register int flags |
362 |
> |
const RAY *r, |
363 |
> |
int flags |
364 |
|
) |
365 |
|
{ |
366 |
|
double sum = 0.0; |
373 |
|
} |
374 |
|
|
375 |
|
|
376 |
< |
extern void |
376 |
> |
void |
377 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
378 |
< |
double rc[3], |
378 |
> |
RREAL rc[3], |
379 |
|
const RAY *r, |
380 |
|
int flags |
381 |
|
) |
399 |
|
} |
400 |
|
|
401 |
|
|
402 |
< |
extern double |
402 |
> |
double |
403 |
|
raynormal( /* compute perturbed normal for ray */ |
404 |
|
FVECT norm, |
405 |
< |
register RAY *r |
405 |
> |
RAY *r |
406 |
|
) |
407 |
|
{ |
408 |
|
double newdot; |
409 |
< |
register int i; |
409 |
> |
int i; |
410 |
|
|
411 |
|
/* The perturbation is added to the surface normal to obtain |
412 |
|
* the new normal. If the new normal would affect the surface |
435 |
|
} |
436 |
|
|
437 |
|
|
438 |
< |
extern void |
438 |
> |
void |
439 |
|
newrayxf( /* get new tranformation matrix for ray */ |
440 |
|
RAY *r |
441 |
|
) |
444 |
|
struct xfn *next; |
445 |
|
FULLXF xf; |
446 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
447 |
< |
register struct xfn *xp; |
448 |
< |
register const RAY *rp; |
447 |
> |
struct xfn *xp; |
448 |
> |
const RAY *rp; |
449 |
|
|
450 |
|
/* |
451 |
|
* Search for transform in circular list that |
456 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
457 |
|
xp = xp->next; /* move to next */ |
458 |
|
if (xp == xflast) { /* need new one */ |
459 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
459 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
460 |
|
if (xp == NULL) |
461 |
|
error(SYSTEM, |
462 |
|
"out of memory in newrayxf"); |
473 |
|
} |
474 |
|
|
475 |
|
|
476 |
< |
extern void |
476 |
> |
void |
477 |
|
flipsurface( /* reverse surface orientation */ |
478 |
< |
register RAY *r |
478 |
> |
RAY *r |
479 |
|
) |
480 |
|
{ |
481 |
|
r->rod = -r->rod; |
488 |
|
} |
489 |
|
|
490 |
|
|
491 |
< |
extern void |
491 |
> |
void |
492 |
|
rayhit( /* standard ray hit test */ |
493 |
|
OBJECT *oset, |
494 |
|
RAY *r |
505 |
|
} |
506 |
|
|
507 |
|
|
508 |
< |
extern int |
508 |
> |
int |
509 |
|
localhit( /* check for hit in the octree */ |
510 |
< |
register RAY *r, |
511 |
< |
register CUBE *scene |
510 |
> |
RAY *r, |
511 |
> |
CUBE *scene |
512 |
|
) |
513 |
|
{ |
514 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
515 |
|
FVECT curpos; /* current cube position */ |
516 |
|
int sflags; /* sign flags */ |
517 |
|
double t, dt; |
518 |
< |
register int i; |
518 |
> |
int i; |
519 |
|
|
520 |
|
nrays++; /* increment trace counter */ |
521 |
|
sflags = 0; |
526 |
|
else if (r->rdir[i] < -1e-7) |
527 |
|
sflags |= 0x10 << i; |
528 |
|
} |
529 |
< |
if (sflags == 0) |
530 |
< |
error(CONSISTENCY, "zero ray direction in localhit"); |
529 |
> |
if (!sflags) { |
530 |
> |
error(WARNING, "zero ray direction in localhit"); |
531 |
> |
return(0); |
532 |
> |
} |
533 |
|
/* start off assuming nothing hit */ |
534 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
535 |
|
r->ro = &Aftplane; |
536 |
|
r->rot = r->rmax; |
537 |
< |
for (i = 0; i < 3; i++) |
518 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
537 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
538 |
|
} |
539 |
|
/* find global cube entrance point */ |
540 |
|
t = 0.0; |
557 |
|
if (t >= r->rot) /* clipped already */ |
558 |
|
return(0); |
559 |
|
/* advance position */ |
560 |
< |
for (i = 0; i < 3; i++) |
542 |
< |
curpos[i] += r->rdir[i]*t; |
560 |
> |
VSUM(curpos, curpos, r->rdir, t); |
561 |
|
|
562 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
563 |
|
return(0); |
573 |
|
FVECT pos, /* current position, modified herein */ |
574 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
575 |
|
int dirf, /* direction indicators to speed tests */ |
576 |
< |
register RAY *r, |
577 |
< |
register CUBE *cu |
576 |
> |
RAY *r, |
577 |
> |
CUBE *cu |
578 |
|
) |
579 |
|
{ |
580 |
|
int ax; |
582 |
|
|
583 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
584 |
|
CUBE cukid; |
585 |
< |
register int br, sgn; |
585 |
> |
int br, sgn; |
586 |
|
|
587 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
588 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
648 |
|
ax = 2; |
649 |
|
} |
650 |
|
} |
651 |
< |
pos[0] += r->rdir[0]*t; |
634 |
< |
pos[1] += r->rdir[1]*t; |
635 |
< |
pos[2] += r->rdir[2]*t; |
651 |
> |
VSUM(pos, pos, r->rdir, t); |
652 |
|
return(ax); |
653 |
|
} |
654 |
|
|
655 |
|
|
656 |
|
static int |
657 |
|
checkhit( /* check for hit in full cube */ |
658 |
< |
register RAY *r, |
658 |
> |
RAY *r, |
659 |
|
CUBE *cu, |
660 |
|
OBJECT *cxs |
661 |
|
) |
676 |
|
|
677 |
|
static void |
678 |
|
checkset( /* modify checked set and set to check */ |
679 |
< |
register OBJECT *os, /* os' = os - cs */ |
680 |
< |
register OBJECT *cs /* cs' = cs + os */ |
679 |
> |
OBJECT *os, /* os' = os - cs */ |
680 |
> |
OBJECT *cs /* cs' = cs + os */ |
681 |
|
) |
682 |
|
{ |
683 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
684 |
< |
register int i, j; |
684 |
> |
int i, j; |
685 |
|
int k; |
686 |
|
/* copy os in place, cset <- cs */ |
687 |
|
cset[0] = 0; |