10 |
|
#include "mkillum.h" |
11 |
|
#include "face.h" |
12 |
|
#include "cone.h" |
13 |
< |
#include "random.h" |
13 |
> |
#include "source.h" |
14 |
|
|
15 |
+ |
#ifndef NBSDFSAMPS |
16 |
+ |
#define NBSDFSAMPS 256 /* BSDF resampling count */ |
17 |
+ |
#endif |
18 |
|
|
19 |
|
COLORV * distarr = NULL; /* distribution array */ |
20 |
|
int distsiz = 0; |
21 |
+ |
COLORV * direct_discount = NULL; /* amount to take off direct */ |
22 |
|
|
23 |
|
|
24 |
|
void |
26 |
|
int siz |
27 |
|
) |
28 |
|
{ |
29 |
< |
if (siz == 0) { |
29 |
> |
if (siz <= 0) { |
30 |
|
if (distsiz > 0) |
31 |
|
free((void *)distarr); |
32 |
|
distarr = NULL; |
45 |
|
} |
46 |
|
|
47 |
|
|
48 |
+ |
static void |
49 |
+ |
new_discount() /* allocate space for direct contrib. record */ |
50 |
+ |
{ |
51 |
+ |
if (distsiz <= 0) |
52 |
+ |
return; |
53 |
+ |
direct_discount = (COLORV *)calloc(distsiz, sizeof(COLOR)); |
54 |
+ |
if (direct_discount == NULL) |
55 |
+ |
error(SYSTEM, "out of memory in new_discount"); |
56 |
+ |
} |
57 |
+ |
|
58 |
+ |
|
59 |
+ |
static void |
60 |
+ |
done_discount() /* clear off direct contrib. record */ |
61 |
+ |
{ |
62 |
+ |
if (direct_discount == NULL) |
63 |
+ |
return; |
64 |
+ |
free((void *)direct_discount); |
65 |
+ |
direct_discount = NULL; |
66 |
+ |
} |
67 |
+ |
|
68 |
+ |
|
69 |
|
int |
70 |
< |
process_ray(RAY *r, int rv) |
70 |
> |
process_ray( /* process a ray result or report error */ |
71 |
> |
RAY *r, |
72 |
> |
int rv |
73 |
> |
) |
74 |
|
{ |
75 |
|
COLORV *colp; |
76 |
|
|
77 |
< |
if (rv == 0) |
77 |
> |
if (rv == 0) /* no result ready */ |
78 |
|
return(0); |
79 |
|
if (rv < 0) |
80 |
|
error(USER, "ray tracing process died"); |
81 |
|
if (r->rno >= distsiz) |
82 |
|
error(INTERNAL, "bad returned index in process_ray"); |
83 |
+ |
multcolor(r->rcol, r->rcoef); /* in case it's a source ray */ |
84 |
|
colp = &distarr[r->rno * 3]; |
85 |
|
addcolor(colp, r->rcol); |
86 |
+ |
if (r->rsrc >= 0 && /* remember source contrib. */ |
87 |
+ |
direct_discount != NULL) { |
88 |
+ |
colp = &direct_discount[r->rno * 3]; |
89 |
+ |
addcolor(colp, r->rcol); |
90 |
+ |
} |
91 |
|
return(1); |
92 |
|
} |
93 |
|
|
94 |
|
|
95 |
|
void |
96 |
< |
raysamp( /* queue a ray sample */ |
96 |
> |
raysamp( /* queue a ray sample */ |
97 |
|
int ndx, |
98 |
|
FVECT org, |
99 |
|
FVECT dir |
115 |
|
|
116 |
|
|
117 |
|
void |
118 |
+ |
srcsamps( /* sample sources from this surface position */ |
119 |
+ |
struct illum_args *il, |
120 |
+ |
FVECT org, |
121 |
+ |
FVECT nrm, |
122 |
+ |
MAT4 ixfm |
123 |
+ |
) |
124 |
+ |
{ |
125 |
+ |
int nalt, nazi; |
126 |
+ |
SRCINDEX si; |
127 |
+ |
RAY sr; |
128 |
+ |
FVECT v; |
129 |
+ |
double d; |
130 |
+ |
int i, j; |
131 |
+ |
/* get sampling density */ |
132 |
+ |
if (il->sampdens <= 0) { |
133 |
+ |
nalt = nazi = 1; |
134 |
+ |
} else { |
135 |
+ |
i = PI * il->sampdens; |
136 |
+ |
nalt = sqrt(i/PI) + .5; |
137 |
+ |
nazi = PI*nalt + .5; |
138 |
+ |
} |
139 |
+ |
initsrcindex(&si); /* loop over (sub)sources */ |
140 |
+ |
for ( ; ; ) { |
141 |
+ |
VCOPY(sr.rorg, org); /* pick side to shoot from */ |
142 |
+ |
if (il->sd != NULL) { |
143 |
+ |
int sn = si.sn; |
144 |
+ |
if (si.sp+1 >= si.np) ++sn; |
145 |
+ |
if (sn >= nsources) break; |
146 |
+ |
if (source[sn].sflags & SDISTANT) |
147 |
+ |
d = DOT(source[sn].sloc, nrm); |
148 |
+ |
else { |
149 |
+ |
VSUB(v, source[sn].sloc, org); |
150 |
+ |
d = DOT(v, nrm); |
151 |
+ |
} |
152 |
+ |
} else |
153 |
+ |
d = 1.0; /* only transmission */ |
154 |
+ |
if (d < 0.0) |
155 |
+ |
d = -1.0001*il->thick - 5.*FTINY; |
156 |
+ |
else |
157 |
+ |
d = 5.*FTINY; |
158 |
+ |
for (i = 3; i--; ) |
159 |
+ |
sr.rorg[i] += d*nrm[i]; |
160 |
+ |
samplendx++; /* increment sample counter */ |
161 |
+ |
if (!srcray(&sr, NULL, &si)) |
162 |
+ |
break; /* end of sources */ |
163 |
+ |
/* index direction */ |
164 |
+ |
if (ixfm != NULL) |
165 |
+ |
multv3(v, sr.rdir, ixfm); |
166 |
+ |
else |
167 |
+ |
VCOPY(v, sr.rdir); |
168 |
+ |
if (il->sd != NULL) { |
169 |
+ |
i = getBSDF_incndx(il->sd, v); |
170 |
+ |
if (i < 0) |
171 |
+ |
continue; /* must not be important */ |
172 |
+ |
sr.rno = i; |
173 |
+ |
d = 1.0/getBSDF_incohm(il->sd, i); |
174 |
+ |
} else { |
175 |
+ |
if (v[2] >= -FTINY) |
176 |
+ |
continue; /* only sample transmission */ |
177 |
+ |
v[0] = -v[0]; v[1] = -v[1]; v[2] = -v[2]; |
178 |
+ |
sr.rno = flatindex(v, nalt, nazi); |
179 |
+ |
d = nalt*nazi*(1./PI) * v[2]; |
180 |
+ |
} |
181 |
+ |
d *= si.dom; /* solid angle correction */ |
182 |
+ |
scalecolor(sr.rcoef, d); |
183 |
+ |
process_ray(&sr, ray_pqueue(&sr)); |
184 |
+ |
} |
185 |
+ |
} |
186 |
+ |
|
187 |
+ |
|
188 |
+ |
void |
189 |
|
rayclean() /* finish all pending rays */ |
190 |
|
{ |
191 |
|
RAY myRay; |
232 |
|
} |
233 |
|
|
234 |
|
|
235 |
< |
static void |
235 |
> |
void |
236 |
|
flatdir( /* compute uniform hemispherical direction */ |
237 |
< |
register FVECT dv, |
237 |
> |
FVECT dv, |
238 |
|
double alt, |
239 |
|
double azi |
240 |
|
) |
248 |
|
dv[2] = sqrt(1. - alt); |
249 |
|
} |
250 |
|
|
251 |
+ |
int |
252 |
+ |
flatindex( /* compute index for hemispherical direction */ |
253 |
+ |
FVECT dv, |
254 |
+ |
int nalt, |
255 |
+ |
int nazi |
256 |
+ |
) |
257 |
+ |
{ |
258 |
+ |
double d; |
259 |
+ |
int i, j; |
260 |
+ |
|
261 |
+ |
d = 1.0 - dv[2]*dv[2]; |
262 |
+ |
i = d*nalt; |
263 |
+ |
d = atan2(dv[1], dv[0]) * (0.5/PI); |
264 |
+ |
if (d < 0.0) d += 1.0; |
265 |
+ |
j = d*nazi + 0.5; |
266 |
+ |
if (j >= nazi) j = 0; |
267 |
+ |
return(i*nazi + j); |
268 |
+ |
} |
269 |
|
|
270 |
+ |
|
271 |
|
int |
272 |
|
my_default( /* default illum action */ |
273 |
|
OBJREC *ob, |
290 |
|
char *nm |
291 |
|
) |
292 |
|
{ |
169 |
– |
#define MAXMISS (5*n*il->nsamps) |
293 |
|
int dim[2]; |
294 |
< |
int n, nalt, nazi, h, alti; |
294 |
> |
int n, nalt, nazi, alti; |
295 |
|
double sp[2], r1, r2; |
296 |
+ |
int h; |
297 |
|
FVECT dn, org, dir; |
298 |
|
FVECT u, v; |
299 |
|
double ur[2], vr[2]; |
300 |
|
MAT4 xfm; |
301 |
< |
int nmisses; |
301 |
> |
int nallow; |
302 |
|
FACE *fa; |
303 |
< |
register int i, j; |
303 |
> |
int i, j; |
304 |
|
/* get/check arguments */ |
305 |
|
fa = getface(ob); |
306 |
|
if (fa->area == 0.0) { |
353 |
|
} |
354 |
|
dim[0] = random(); |
355 |
|
/* sample polygon */ |
356 |
< |
nmisses = 0; |
356 |
> |
nallow = 5*n*il->nsamps; |
357 |
|
for (dim[1] = 0; dim[1] < n; dim[1]++) |
358 |
|
for (i = 0; i < il->nsamps; i++) { |
359 |
|
/* randomize direction */ |
372 |
|
} |
373 |
|
/* randomize location */ |
374 |
|
do { |
375 |
< |
multisamp(sp, 2, urand(h+4862+nmisses)); |
375 |
> |
multisamp(sp, 2, urand(h+4862+nallow)); |
376 |
|
r1 = ur[0] + (ur[1]-ur[0]) * sp[0]; |
377 |
|
r2 = vr[0] + (vr[1]-vr[0]) * sp[1]; |
378 |
|
for (j = 0; j < 3; j++) |
379 |
|
org[j] = r1*u[j] + r2*v[j] |
380 |
|
+ fa->offset*fa->norm[j]; |
381 |
< |
} while (!inface(org, fa) && nmisses++ < MAXMISS); |
382 |
< |
if (nmisses > MAXMISS) { |
381 |
> |
} while (!inface(org, fa) && nallow-- > 0); |
382 |
> |
if (nallow < 0) { |
383 |
|
objerror(ob, WARNING, "bad aspect"); |
384 |
|
rayclean(); |
385 |
|
freeface(ob); |
386 |
|
return(my_default(ob, il, nm)); |
387 |
|
} |
388 |
|
if (il->sd != NULL && DOT(dir, fa->norm) < -FTINY) |
389 |
< |
r1 = -1.0001*il->thick - .0001; |
389 |
> |
r1 = -1.0001*il->thick - 5.*FTINY; |
390 |
|
else |
391 |
< |
r1 = .0001; |
391 |
> |
r1 = 5.*FTINY; |
392 |
|
for (j = 0; j < 3; j++) |
393 |
|
org[j] += r1*fa->norm[j]; |
394 |
|
/* send sample */ |
395 |
|
raysamp(dim[1], org, dir); |
396 |
|
} |
397 |
+ |
/* add in direct component? */ |
398 |
+ |
if (!directvis && (il->flags & IL_LIGHT || il->sd != NULL)) { |
399 |
+ |
MAT4 ixfm; |
400 |
+ |
if (il->sd == NULL) { |
401 |
+ |
for (i = 3; i--; ) { |
402 |
+ |
ixfm[i][0] = u[i]; |
403 |
+ |
ixfm[i][1] = v[i]; |
404 |
+ |
ixfm[i][2] = fa->norm[i]; |
405 |
+ |
ixfm[i][3] = 0.; |
406 |
+ |
} |
407 |
+ |
ixfm[3][0] = ixfm[3][1] = ixfm[3][2] = 0.; |
408 |
+ |
ixfm[3][3] = 1.; |
409 |
+ |
} else { |
410 |
+ |
if (!invmat4(ixfm, xfm)) |
411 |
+ |
objerror(ob, INTERNAL, |
412 |
+ |
"cannot invert BSDF transform"); |
413 |
+ |
if (!(il->flags & IL_LIGHT)) |
414 |
+ |
new_discount(); |
415 |
+ |
} |
416 |
+ |
dim[0] = random(); |
417 |
+ |
nallow = 10*il->nsamps; |
418 |
+ |
for (i = 0; i < il->nsamps; i++) { |
419 |
+ |
/* randomize location */ |
420 |
+ |
h = dim[0] + samplendx++; |
421 |
+ |
do { |
422 |
+ |
multisamp(sp, 2, urand(h+nallow)); |
423 |
+ |
r1 = ur[0] + (ur[1]-ur[0]) * sp[0]; |
424 |
+ |
r2 = vr[0] + (vr[1]-vr[0]) * sp[1]; |
425 |
+ |
for (j = 0; j < 3; j++) |
426 |
+ |
org[j] = r1*u[j] + r2*v[j] |
427 |
+ |
+ fa->offset*fa->norm[j]; |
428 |
+ |
} while (!inface(org, fa) && nallow-- > 0); |
429 |
+ |
if (nallow < 0) { |
430 |
+ |
objerror(ob, WARNING, "bad aspect"); |
431 |
+ |
rayclean(); |
432 |
+ |
freeface(ob); |
433 |
+ |
return(my_default(ob, il, nm)); |
434 |
+ |
} |
435 |
+ |
/* sample source rays */ |
436 |
+ |
srcsamps(il, org, fa->norm, ixfm); |
437 |
+ |
} |
438 |
+ |
} |
439 |
+ |
/* wait for all rays to finish */ |
440 |
|
rayclean(); |
441 |
|
if (il->sd != NULL) { /* run distribution through BSDF */ |
442 |
|
nalt = sqrt(il->sd->nout/PI) + .5; |
443 |
|
nazi = PI*nalt + .5; |
444 |
|
redistribute(il->sd, nalt, nazi, u, v, fa->norm, xfm); |
445 |
+ |
done_discount(); |
446 |
+ |
if (!il->sampdens) |
447 |
+ |
il->sampdens = nalt*nazi/PI + .999; |
448 |
|
} |
449 |
|
/* write out the face and its distribution */ |
450 |
|
if (average(il, distarr, n)) { |
456 |
|
/* clean up */ |
457 |
|
freeface(ob); |
458 |
|
return(0); |
289 |
– |
#undef MAXMISS |
459 |
|
} |
460 |
|
|
461 |
|
|
513 |
|
/* send sample */ |
514 |
|
raysamp(dim[1]*nazi+dim[2], org, dir); |
515 |
|
} |
516 |
+ |
/* wait for all rays to finish */ |
517 |
|
rayclean(); |
518 |
|
/* write out the sphere and its distribution */ |
519 |
|
if (average(il, distarr, n)) { |
544 |
|
FVECT u, v; |
545 |
|
MAT4 xfm; |
546 |
|
CONE *co; |
547 |
< |
register int i, j; |
547 |
> |
int i, j; |
548 |
|
/* get/check arguments */ |
549 |
|
co = getcone(ob, 0); |
550 |
|
/* set up sampling */ |
583 |
|
r2 = (dim[1] - alti*nazi + sp[1] - .5)/nazi; |
584 |
|
flatdir(dn, r1, r2); |
585 |
|
for (j = 0; j < 3; j++) |
586 |
< |
dir[j] = -dn[0]*u[j] - dn[1]*v[j] - dn[2]*co->ad[j]; |
586 |
> |
dir[j] = -dn[0]*u[j] - dn[1]*v[j] - dn[2]*co->ad[j]; |
587 |
|
} |
588 |
|
/* randomize location */ |
589 |
|
multisamp(sp, 2, urand(h+8371)); |
593 |
|
r1 = r3*cos(r2); |
594 |
|
r2 = r3*sin(r2); |
595 |
|
if (il->sd != NULL && DOT(dir, co->ad) < -FTINY) |
596 |
< |
r3 = -1.0001*il->thick - .0001; |
596 |
> |
r3 = -1.0001*il->thick - 5.*FTINY; |
597 |
|
else |
598 |
< |
r3 = .0001; |
598 |
> |
r3 = 5.*FTINY; |
599 |
|
for (j = 0; j < 3; j++) |
600 |
|
org[j] = CO_P0(co)[j] + r1*u[j] + r2*v[j] + |
601 |
|
r3*co->ad[j]; |
602 |
|
/* send sample */ |
603 |
|
raysamp(dim[1], org, dir); |
604 |
|
} |
605 |
+ |
/* add in direct component? */ |
606 |
+ |
if (!directvis && (il->flags & IL_LIGHT || il->sd != NULL)) { |
607 |
+ |
MAT4 ixfm; |
608 |
+ |
if (il->sd == NULL) { |
609 |
+ |
for (i = 3; i--; ) { |
610 |
+ |
ixfm[i][0] = u[i]; |
611 |
+ |
ixfm[i][1] = v[i]; |
612 |
+ |
ixfm[i][2] = co->ad[i]; |
613 |
+ |
ixfm[i][3] = 0.; |
614 |
+ |
} |
615 |
+ |
ixfm[3][0] = ixfm[3][1] = ixfm[3][2] = 0.; |
616 |
+ |
ixfm[3][3] = 1.; |
617 |
+ |
} else { |
618 |
+ |
if (!invmat4(ixfm, xfm)) |
619 |
+ |
objerror(ob, INTERNAL, |
620 |
+ |
"cannot invert BSDF transform"); |
621 |
+ |
if (!(il->flags & IL_LIGHT)) |
622 |
+ |
new_discount(); |
623 |
+ |
} |
624 |
+ |
dim[0] = random(); |
625 |
+ |
for (i = 0; i < il->nsamps; i++) { |
626 |
+ |
/* randomize location */ |
627 |
+ |
h = dim[0] + samplendx++; |
628 |
+ |
multisamp(sp, 2, urand(h)); |
629 |
+ |
r3 = sqrt(CO_R0(co)*CO_R0(co) + |
630 |
+ |
sp[0]*(CO_R1(co)*CO_R1(co) - CO_R0(co)*CO_R0(co))); |
631 |
+ |
r2 = 2.*PI*sp[1]; |
632 |
+ |
r1 = r3*cos(r2); |
633 |
+ |
r2 = r3*sin(r2); |
634 |
+ |
for (j = 0; j < 3; j++) |
635 |
+ |
org[j] = CO_P0(co)[j] + r1*u[j] + r2*v[j]; |
636 |
+ |
/* sample source rays */ |
637 |
+ |
srcsamps(il, org, co->ad, ixfm); |
638 |
+ |
} |
639 |
+ |
} |
640 |
+ |
/* wait for all rays to finish */ |
641 |
|
rayclean(); |
642 |
|
if (il->sd != NULL) { /* run distribution through BSDF */ |
643 |
|
nalt = sqrt(il->sd->nout/PI) + .5; |
644 |
|
nazi = PI*nalt + .5; |
645 |
|
redistribute(il->sd, nalt, nazi, u, v, co->ad, xfm); |
646 |
+ |
done_discount(); |
647 |
+ |
if (!il->sampdens) |
648 |
+ |
il->sampdens = nalt*nazi/PI + .999; |
649 |
|
} |
650 |
|
/* write out the ring and its distribution */ |
651 |
|
if (average(il, distarr, n)) { |
657 |
|
/* clean up */ |
658 |
|
freecone(ob); |
659 |
|
return(1); |
660 |
+ |
} |
661 |
+ |
|
662 |
+ |
|
663 |
+ |
void |
664 |
+ |
redistribute( /* pass distarr ray sums through BSDF */ |
665 |
+ |
struct BSDF_data *b, |
666 |
+ |
int nalt, |
667 |
+ |
int nazi, |
668 |
+ |
FVECT u, |
669 |
+ |
FVECT v, |
670 |
+ |
FVECT w, |
671 |
+ |
MAT4 xm |
672 |
+ |
) |
673 |
+ |
{ |
674 |
+ |
int nout = 0; |
675 |
+ |
MAT4 mymat, inmat; |
676 |
+ |
COLORV *idist; |
677 |
+ |
COLORV *cp; |
678 |
+ |
FVECT dv; |
679 |
+ |
double wt; |
680 |
+ |
int i, j, k, c, o; |
681 |
+ |
COLOR col, cinc; |
682 |
+ |
/* copy incoming distribution */ |
683 |
+ |
if (b->ninc > distsiz) |
684 |
+ |
error(INTERNAL, "error 1 in redistribute"); |
685 |
+ |
idist = (COLORV *)malloc(sizeof(COLOR)*b->ninc); |
686 |
+ |
if (idist == NULL) |
687 |
+ |
error(SYSTEM, "out of memory in redistribute"); |
688 |
+ |
memcpy(idist, distarr, sizeof(COLOR)*b->ninc); |
689 |
+ |
/* compose direction transform */ |
690 |
+ |
for (i = 3; i--; ) { |
691 |
+ |
mymat[i][0] = u[i]; |
692 |
+ |
mymat[i][1] = v[i]; |
693 |
+ |
mymat[i][2] = w[i]; |
694 |
+ |
mymat[i][3] = 0.; |
695 |
+ |
} |
696 |
+ |
mymat[3][0] = mymat[3][1] = mymat[3][2] = 0.; |
697 |
+ |
mymat[3][3] = 1.; |
698 |
+ |
if (xm != NULL) |
699 |
+ |
multmat4(mymat, xm, mymat); |
700 |
+ |
for (i = 3; i--; ) { /* make sure it's normalized */ |
701 |
+ |
wt = 1./sqrt( mymat[0][i]*mymat[0][i] + |
702 |
+ |
mymat[1][i]*mymat[1][i] + |
703 |
+ |
mymat[2][i]*mymat[2][i] ); |
704 |
+ |
for (j = 3; j--; ) |
705 |
+ |
mymat[j][i] *= wt; |
706 |
+ |
} |
707 |
+ |
if (!invmat4(inmat, mymat)) /* need inverse as well */ |
708 |
+ |
error(INTERNAL, "cannot invert BSDF transform"); |
709 |
+ |
newdist(nalt*nazi); /* resample distribution */ |
710 |
+ |
for (i = b->ninc; i--; ) { |
711 |
+ |
int direct_out = -1; |
712 |
+ |
COLOR cdir; |
713 |
+ |
getBSDF_incvec(dv, b, i); /* compute incident irrad. */ |
714 |
+ |
multv3(dv, dv, mymat); |
715 |
+ |
if (dv[2] < 0.0) { |
716 |
+ |
dv[0] = -dv[0]; dv[1] = -dv[1]; dv[2] = -dv[2]; |
717 |
+ |
direct_out += (direct_discount != NULL); |
718 |
+ |
} |
719 |
+ |
wt = getBSDF_incohm(b, i); |
720 |
+ |
wt *= dv[2]; /* solid_angle*cosine(theta) */ |
721 |
+ |
cp = &idist[3*i]; |
722 |
+ |
copycolor(cinc, cp); |
723 |
+ |
scalecolor(cinc, wt); |
724 |
+ |
if (!direct_out) { /* discount direct contr. */ |
725 |
+ |
cp = &direct_discount[3*i]; |
726 |
+ |
copycolor(cdir, cp); |
727 |
+ |
scalecolor(cdir, -wt); |
728 |
+ |
direct_out = flatindex(dv, nalt, nazi); |
729 |
+ |
} |
730 |
+ |
for (k = nalt; k--; ) /* loop over distribution */ |
731 |
+ |
for (j = nazi; j--; ) { |
732 |
+ |
int rstart = random(); |
733 |
+ |
for (c = NBSDFSAMPS; c--; ) { |
734 |
+ |
double sp[2]; |
735 |
+ |
multisamp(sp, 2, urand(rstart+c)); |
736 |
+ |
flatdir(dv, (k + sp[0])/nalt, |
737 |
+ |
(j + .5 - sp[1])/nazi); |
738 |
+ |
multv3(dv, dv, inmat); |
739 |
+ |
/* evaluate BSDF @ outgoing */ |
740 |
+ |
o = getBSDF_outndx(b, dv); |
741 |
+ |
if (o < 0) { |
742 |
+ |
nout++; |
743 |
+ |
continue; |
744 |
+ |
} |
745 |
+ |
wt = BSDF_value(b, i, o) * (1./NBSDFSAMPS); |
746 |
+ |
copycolor(col, cinc); |
747 |
+ |
o = k*nazi + j; |
748 |
+ |
if (o == direct_out) |
749 |
+ |
addcolor(col, cdir); /* minus direct */ |
750 |
+ |
scalecolor(col, wt); |
751 |
+ |
cp = &distarr[3*o]; |
752 |
+ |
addcolor(cp, col); /* sum into distribution */ |
753 |
+ |
} |
754 |
+ |
} |
755 |
+ |
} |
756 |
+ |
free(idist); /* free temp space */ |
757 |
+ |
if (nout) { |
758 |
+ |
sprintf(errmsg, "missing %.1f%% of BSDF directions", |
759 |
+ |
100.*nout/(b->ninc*nalt*nazi*NBSDFSAMPS)); |
760 |
+ |
error(WARNING, errmsg); |
761 |
+ |
} |
762 |
|
} |