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#include "source.h" |
14 |
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#include "paths.h" |
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|
16 |
< |
#ifndef NBSDFSAMPS |
17 |
< |
#define NBSDFSAMPS 256 /* BSDF resampling count */ |
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> |
#ifndef R_EPS |
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> |
#define R_EPS 0.005 /* relative epsilon for ray origin */ |
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#endif |
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|
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COLORV * distarr = NULL; /* distribution array */ |
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srcsamps( /* sample sources from this surface position */ |
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struct illum_args *il, |
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FVECT org, |
95 |
< |
FVECT nrm, |
95 |
> |
double eps, |
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MAT4 ixfm |
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) |
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{ |
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initsrcindex(&si); /* loop over (sub)sources */ |
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for ( ; ; ) { |
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VCOPY(sr.rorg, org); /* pick side to shoot from */ |
114 |
– |
d = 5.*FTINY; |
115 |
– |
VSUM(sr.rorg, sr.rorg, nrm, d); |
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samplendx++; /* increment sample counter */ |
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if (!srcray(&sr, NULL, &si)) |
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break; /* end of sources */ |
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else |
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VCOPY(v, sr.rdir); |
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if (v[2] >= -FTINY) |
123 |
< |
continue; /* only sample transmission */ |
123 |
> |
continue; /* only sample transmission */ |
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v[0] = -v[0]; v[1] = -v[1]; v[2] = -v[2]; |
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sr.rno = flatindex(v, nalt, nazi); |
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d = nalt*nazi*(1./PI) * v[2]; |
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d *= si.dom; /* solid angle correction */ |
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scalecolor(sr.rcoef, d); |
129 |
+ |
VSUM(sr.rorg, sr.rorg, sr.rdir, -eps); |
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process_ray(&sr, ray_pqueue(&sr)); |
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} |
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} |
149 |
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FVECT n |
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) |
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{ |
152 |
< |
getperpendicular(u, n); |
152 |
> |
getperpendicular(u, n, 1); |
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fcross(v, n, u); |
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} |
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|
237 |
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FVECT dn, org, dir; |
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FVECT u, v; |
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double ur[2], vr[2]; |
240 |
+ |
double epsilon; |
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MAT4 xfm; |
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char xfrot[64]; |
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int nallow; |
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dim[0] = random(); |
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/* sample polygon */ |
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nallow = 5*n*il->nsamps; |
290 |
+ |
epsilon = R_EPS*sqrt(fa->area); |
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for (dim[1] = 0; dim[1] < n; dim[1]++) |
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for (i = 0; i < il->nsamps; i++) { |
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/* randomize direction */ |
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freeface(ob); |
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return(my_default(ob, il, nm)); |
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} |
318 |
< |
r1 = 5.*FTINY; |
318 |
< |
for (j = 0; j < 3; j++) |
319 |
< |
org[j] += r1*fa->norm[j]; |
318 |
> |
VSUM(org, org, dir, -epsilon); |
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/* send sample */ |
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raysamp(dim[1], org, dir); |
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} |
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return(my_default(ob, il, nm)); |
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} |
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/* sample source rays */ |
353 |
< |
srcsamps(il, org, fa->norm, ixfm); |
353 |
> |
srcsamps(il, org, epsilon, ixfm); |
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} |
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} |
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/* wait for all rays to finish */ |
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|
int dim[2]; |
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|
int n, nalt, nazi, alti; |
448 |
|
double sp[2], r1, r2, r3; |
449 |
+ |
double epsilon; |
450 |
|
int h; |
451 |
|
FVECT dn, org, dir; |
452 |
|
FVECT u, v; |
453 |
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MAT4 xfm; |
454 |
|
CONE *co; |
455 |
|
int i, j; |
456 |
< |
/* get/check arguments */ |
456 |
> |
/* get/check arguments */ |
457 |
|
co = getcone(ob, 0); |
458 |
< |
/* set up sampling */ |
458 |
> |
if (co == NULL) |
459 |
> |
objerror(ob, USER, "cannot create illum"); |
460 |
> |
/* set up sampling */ |
461 |
|
if (il->sampdens <= 0) { |
462 |
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nalt = nazi = 1; /* diffuse assumption */ |
463 |
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} else { |
465 |
|
nalt = sqrt(n/PI) + .5; |
466 |
|
nazi = PI*nalt + .5; |
467 |
|
} |
468 |
+ |
epsilon = R_EPS*CO_R1(co); |
469 |
|
n = nazi*nalt; |
470 |
|
newdist(n); |
471 |
|
mkaxes(u, v, co->ad); |
490 |
|
r2 = 2.*PI*sp[1]; |
491 |
|
r1 = r3*cos(r2); |
492 |
|
r2 = r3*sin(r2); |
490 |
– |
r3 = 5.*FTINY; |
493 |
|
for (j = 0; j < 3; j++) |
494 |
|
org[j] = CO_P0(co)[j] + r1*u[j] + r2*v[j] + |
495 |
< |
r3*co->ad[j]; |
495 |
> |
epsilon*co->ad[j]; |
496 |
|
/* send sample */ |
497 |
|
raysamp(dim[1], org, dir); |
498 |
|
} |
520 |
|
for (j = 0; j < 3; j++) |
521 |
|
org[j] = CO_P0(co)[j] + r1*u[j] + r2*v[j]; |
522 |
|
/* sample source rays */ |
523 |
< |
srcsamps(il, org, co->ad, ixfm); |
523 |
> |
srcsamps(il, org, epsilon, ixfm); |
524 |
|
} |
525 |
|
} |
526 |
|
/* wait for all rays to finish */ |