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, |
94 |
|
colval(ro->cext,RED) : colval(ro->cext,GRN); |
95 |
|
if (colval(ro->cext,BLU) < re) re = colval(ro->cext,BLU); |
96 |
|
re *= ro->rot; |
97 |
< |
if (re > 0.1) |
98 |
< |
if (re > 92.) |
97 |
> |
if (re > 0.1) { |
98 |
> |
if (re > 92.) { |
99 |
|
r->rweight = 0.0; |
100 |
< |
else |
100 |
> |
} else { |
101 |
|
r->rweight *= exp(-re); |
102 |
+ |
} |
103 |
+ |
} |
104 |
|
} |
105 |
|
rayclear(r); |
106 |
|
if (r->rweight <= 0.0) /* check for expiration */ |
107 |
|
return(-1); |
108 |
|
if (r->crtype & SHADOW) /* shadow commitment */ |
109 |
|
return(0); |
110 |
+ |
/* ambient in photon map? */ |
111 |
+ |
if (ro != NULL && ro->crtype & AMBIENT) { |
112 |
+ |
if (causticPhotonMapping) |
113 |
+ |
return(-1); |
114 |
+ |
if (photonMapping && rt != TRANS) |
115 |
+ |
return(-1); |
116 |
+ |
} |
117 |
|
if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
118 |
|
if (minweight <= 0.0) |
119 |
|
error(USER, "zero ray weight in Russian roulette"); |
121 |
|
return(-1); /* upper reflection limit */ |
122 |
|
if (r->rweight >= minweight) |
123 |
|
return(0); |
124 |
< |
if (frandom() < r->rweight/minweight) |
124 |
> |
if (frandom() > r->rweight/minweight) |
125 |
|
return(-1); |
126 |
|
rw = minweight/r->rweight; /* promote survivor */ |
127 |
|
scalecolor(r->rcoef, rw); |
128 |
|
r->rweight = minweight; |
129 |
|
return(0); |
130 |
|
} |
131 |
< |
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
131 |
> |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
132 |
|
} |
133 |
|
|
134 |
|
|
135 |
< |
extern void |
135 |
> |
void |
136 |
|
rayclear( /* clear a ray for (re)evaluation */ |
137 |
< |
register RAY *r |
137 |
> |
RAY *r |
138 |
|
) |
139 |
|
{ |
140 |
|
r->rno = raynum++; |
151 |
|
} |
152 |
|
|
153 |
|
|
154 |
< |
extern void |
154 |
> |
void |
155 |
|
raytrace( /* trace a ray and compute its value */ |
156 |
|
RAY *r |
157 |
|
) |
171 |
|
} |
172 |
|
|
173 |
|
|
174 |
< |
extern void |
174 |
> |
void |
175 |
|
raycont( /* check for clipped object and continue */ |
176 |
< |
register RAY *r |
176 |
> |
RAY *r |
177 |
|
) |
178 |
|
{ |
179 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
182 |
|
} |
183 |
|
|
184 |
|
|
185 |
< |
extern void |
185 |
> |
void |
186 |
|
raytrans( /* transmit ray as is */ |
187 |
< |
register RAY *r |
187 |
> |
RAY *r |
188 |
|
) |
189 |
|
{ |
190 |
|
RAY tr; |
191 |
|
|
192 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
193 |
< |
VCOPY(tr.rdir, r->rdir); |
194 |
< |
rayvalue(&tr); |
195 |
< |
copycolor(r->rcol, tr.rcol); |
196 |
< |
r->rt = r->rot + tr.rt; |
187 |
< |
} |
192 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
193 |
> |
VCOPY(tr.rdir, r->rdir); |
194 |
> |
rayvalue(&tr); |
195 |
> |
copycolor(r->rcol, tr.rcol); |
196 |
> |
r->rt = r->rot + tr.rt; |
197 |
|
} |
198 |
|
|
199 |
|
|
200 |
< |
extern int |
200 |
> |
int |
201 |
|
rayshade( /* shade ray r with material mod */ |
202 |
< |
register RAY *r, |
202 |
> |
RAY *r, |
203 |
|
int mod |
204 |
|
) |
205 |
|
{ |
206 |
< |
register OBJREC *m; |
206 |
> |
OBJREC *m; |
207 |
|
|
208 |
|
r->rt = r->rot; /* set effective ray length */ |
209 |
|
for ( ; mod != OVOID; mod = m->omod) { |
232 |
|
} |
233 |
|
|
234 |
|
|
235 |
< |
extern void |
235 |
> |
void |
236 |
|
rayparticipate( /* compute ray medium participation */ |
237 |
< |
register RAY *r |
237 |
> |
RAY *r |
238 |
|
) |
239 |
|
{ |
240 |
|
COLOR ce, ca; |
256 |
|
multcolor(r->rcol, ce); /* path extinction */ |
257 |
|
if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
258 |
|
return; /* no scattering */ |
259 |
< |
setcolor(ca, |
260 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
261 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
262 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
263 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
259 |
> |
|
260 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
261 |
> |
if (!volumePhotonMapping) { |
262 |
> |
setcolor(ca, |
263 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
264 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
265 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
266 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
267 |
> |
} |
268 |
> |
|
269 |
|
srcscatter(r); /* source in scattering */ |
270 |
|
} |
271 |
|
|
272 |
|
|
273 |
< |
extern void |
273 |
> |
void |
274 |
|
raytexture( /* get material modifiers */ |
275 |
|
RAY *r, |
276 |
|
OBJECT mod |
277 |
|
) |
278 |
|
{ |
279 |
< |
register OBJREC *m; |
279 |
> |
OBJREC *m; |
280 |
|
/* execute textures and patterns */ |
281 |
|
for ( ; mod != OVOID; mod = m->omod) { |
282 |
|
m = objptr(mod); |
295 |
|
} |
296 |
|
|
297 |
|
|
298 |
< |
extern int |
298 |
> |
int |
299 |
|
raymixture( /* mix modifiers */ |
300 |
< |
register RAY *r, |
300 |
> |
RAY *r, |
301 |
|
OBJECT fore, |
302 |
|
OBJECT back, |
303 |
|
double coef |
305 |
|
{ |
306 |
|
RAY fr, br; |
307 |
|
int foremat, backmat; |
308 |
< |
register int i; |
308 |
> |
int i; |
309 |
|
/* bound coefficient */ |
310 |
|
if (coef > 1.0) |
311 |
|
coef = 1.0; |
315 |
|
foremat = backmat = 0; |
316 |
|
/* foreground */ |
317 |
|
fr = *r; |
318 |
< |
if (coef > FTINY) |
318 |
> |
if (coef > FTINY) { |
319 |
> |
fr.rweight *= coef; |
320 |
> |
scalecolor(fr.rcoef, coef); |
321 |
|
foremat = rayshade(&fr, fore); |
322 |
+ |
} |
323 |
|
/* background */ |
324 |
|
br = *r; |
325 |
< |
if (coef < 1.0-FTINY) |
325 |
> |
if (coef < 1.0-FTINY) { |
326 |
> |
br.rweight *= 1.0-coef; |
327 |
> |
scalecolor(br.rcoef, 1.0-coef); |
328 |
|
backmat = rayshade(&br, back); |
329 |
+ |
} |
330 |
|
/* check for transparency */ |
331 |
|
if (backmat ^ foremat) { |
332 |
|
if (backmat && coef > FTINY) |
355 |
|
} |
356 |
|
|
357 |
|
|
358 |
< |
extern double |
358 |
> |
double |
359 |
|
raydist( /* compute (cumulative) ray distance */ |
360 |
< |
register const RAY *r, |
361 |
< |
register int flags |
360 |
> |
const RAY *r, |
361 |
> |
int flags |
362 |
|
) |
363 |
|
{ |
364 |
|
double sum = 0.0; |
371 |
|
} |
372 |
|
|
373 |
|
|
374 |
< |
extern void |
374 |
> |
void |
375 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
376 |
< |
double rc[3], |
376 |
> |
RREAL rc[3], |
377 |
|
const RAY *r, |
378 |
|
int flags |
379 |
|
) |
397 |
|
} |
398 |
|
|
399 |
|
|
400 |
< |
extern double |
400 |
> |
double |
401 |
|
raynormal( /* compute perturbed normal for ray */ |
402 |
|
FVECT norm, |
403 |
< |
register RAY *r |
403 |
> |
RAY *r |
404 |
|
) |
405 |
|
{ |
406 |
|
double newdot; |
407 |
< |
register int i; |
407 |
> |
int i; |
408 |
|
|
409 |
|
/* The perturbation is added to the surface normal to obtain |
410 |
|
* the new normal. If the new normal would affect the surface |
433 |
|
} |
434 |
|
|
435 |
|
|
436 |
< |
extern void |
436 |
> |
void |
437 |
|
newrayxf( /* get new tranformation matrix for ray */ |
438 |
|
RAY *r |
439 |
|
) |
442 |
|
struct xfn *next; |
443 |
|
FULLXF xf; |
444 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
445 |
< |
register struct xfn *xp; |
446 |
< |
register const RAY *rp; |
445 |
> |
struct xfn *xp; |
446 |
> |
const RAY *rp; |
447 |
|
|
448 |
|
/* |
449 |
|
* Search for transform in circular list that |
454 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
455 |
|
xp = xp->next; /* move to next */ |
456 |
|
if (xp == xflast) { /* need new one */ |
457 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
457 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
458 |
|
if (xp == NULL) |
459 |
|
error(SYSTEM, |
460 |
|
"out of memory in newrayxf"); |
471 |
|
} |
472 |
|
|
473 |
|
|
474 |
< |
extern void |
474 |
> |
void |
475 |
|
flipsurface( /* reverse surface orientation */ |
476 |
< |
register RAY *r |
476 |
> |
RAY *r |
477 |
|
) |
478 |
|
{ |
479 |
|
r->rod = -r->rod; |
486 |
|
} |
487 |
|
|
488 |
|
|
489 |
< |
extern void |
489 |
> |
void |
490 |
|
rayhit( /* standard ray hit test */ |
491 |
|
OBJECT *oset, |
492 |
|
RAY *r |
503 |
|
} |
504 |
|
|
505 |
|
|
506 |
< |
extern int |
506 |
> |
int |
507 |
|
localhit( /* check for hit in the octree */ |
508 |
< |
register RAY *r, |
509 |
< |
register CUBE *scene |
508 |
> |
RAY *r, |
509 |
> |
CUBE *scene |
510 |
|
) |
511 |
|
{ |
512 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
513 |
|
FVECT curpos; /* current cube position */ |
514 |
|
int sflags; /* sign flags */ |
515 |
|
double t, dt; |
516 |
< |
register int i; |
516 |
> |
int i; |
517 |
|
|
518 |
|
nrays++; /* increment trace counter */ |
519 |
|
sflags = 0; |
524 |
|
else if (r->rdir[i] < -1e-7) |
525 |
|
sflags |= 0x10 << i; |
526 |
|
} |
527 |
< |
if (sflags == 0) |
528 |
< |
error(CONSISTENCY, "zero ray direction in localhit"); |
527 |
> |
if (!sflags) { |
528 |
> |
error(WARNING, "zero ray direction in localhit"); |
529 |
> |
return(0); |
530 |
> |
} |
531 |
|
/* start off assuming nothing hit */ |
532 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
533 |
|
r->ro = &Aftplane; |
534 |
|
r->rot = r->rmax; |
535 |
< |
for (i = 0; i < 3; i++) |
514 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
535 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
536 |
|
} |
537 |
|
/* find global cube entrance point */ |
538 |
|
t = 0.0; |
555 |
|
if (t >= r->rot) /* clipped already */ |
556 |
|
return(0); |
557 |
|
/* advance position */ |
558 |
< |
for (i = 0; i < 3; i++) |
538 |
< |
curpos[i] += r->rdir[i]*t; |
558 |
> |
VSUM(curpos, curpos, r->rdir, t); |
559 |
|
|
560 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
561 |
|
return(0); |
571 |
|
FVECT pos, /* current position, modified herein */ |
572 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
573 |
|
int dirf, /* direction indicators to speed tests */ |
574 |
< |
register RAY *r, |
575 |
< |
register CUBE *cu |
574 |
> |
RAY *r, |
575 |
> |
CUBE *cu |
576 |
|
) |
577 |
|
{ |
578 |
|
int ax; |
580 |
|
|
581 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
582 |
|
CUBE cukid; |
583 |
< |
register int br, sgn; |
583 |
> |
int br, sgn; |
584 |
|
|
585 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
586 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
646 |
|
ax = 2; |
647 |
|
} |
648 |
|
} |
649 |
< |
pos[0] += r->rdir[0]*t; |
630 |
< |
pos[1] += r->rdir[1]*t; |
631 |
< |
pos[2] += r->rdir[2]*t; |
649 |
> |
VSUM(pos, pos, r->rdir, t); |
650 |
|
return(ax); |
651 |
|
} |
652 |
|
|
653 |
|
|
654 |
|
static int |
655 |
|
checkhit( /* check for hit in full cube */ |
656 |
< |
register RAY *r, |
656 |
> |
RAY *r, |
657 |
|
CUBE *cu, |
658 |
|
OBJECT *cxs |
659 |
|
) |
674 |
|
|
675 |
|
static void |
676 |
|
checkset( /* modify checked set and set to check */ |
677 |
< |
register OBJECT *os, /* os' = os - cs */ |
678 |
< |
register OBJECT *cs /* cs' = cs + os */ |
677 |
> |
OBJECT *os, /* os' = os - cs */ |
678 |
> |
OBJECT *cs /* cs' = cs + os */ |
679 |
|
) |
680 |
|
{ |
681 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
682 |
< |
register int i, j; |
682 |
> |
int i, j; |
683 |
|
int k; |
684 |
|
/* copy os in place, cset <- cs */ |
685 |
|
cset[0] = 0; |