10 |
|
* |
11 |
|
*/ |
12 |
|
|
13 |
+ |
#define _USE_MATH_DEFINES |
14 |
|
#include <stdio.h> |
15 |
|
#include <stdlib.h> |
16 |
+ |
#include <string.h> |
17 |
|
#include <math.h> |
18 |
+ |
#include <ctype.h> |
19 |
|
#include "ezxml.h" |
20 |
|
#include "hilbert.h" |
21 |
|
#include "bsdf.h" |
38 |
|
/* Additional information on last error (ASCII English) */ |
39 |
|
char SDerrorDetail[256]; |
40 |
|
|
41 |
+ |
/* Empty distribution for getCDist() calls that fail for some reason */ |
42 |
+ |
const SDCDst SDemptyCD; |
43 |
+ |
|
44 |
|
/* Cache of loaded BSDFs */ |
45 |
|
struct SDCache_s *SDcacheList = NULL; |
46 |
|
|
51 |
|
SDError |
52 |
|
SDreportEnglish(SDError ec, FILE *fp) |
53 |
|
{ |
48 |
– |
if (fp == NULL) |
49 |
– |
return ec; |
54 |
|
if (!ec) |
55 |
|
return SDEnone; |
56 |
+ |
if ((ec < SDEnone) | (ec > SDEunknown)) { |
57 |
+ |
SDerrorDetail[0] = '\0'; |
58 |
+ |
ec = SDEunknown; |
59 |
+ |
} |
60 |
+ |
if (fp == NULL) |
61 |
+ |
return ec; |
62 |
|
fputs(SDerrorEnglish[ec], fp); |
63 |
|
if (SDerrorDetail[0]) { |
64 |
|
fputs(": ", fp); |
95 |
|
|
96 |
|
if (wdb == NULL) /* no geometry section? */ |
97 |
|
return SDEnone; |
98 |
+ |
if ((geom = ezxml_child(wdb, "Name")) != NULL) { |
99 |
+ |
strncpy(sd->matn, ezxml_txt(geom), SDnameLn); |
100 |
+ |
if (sd->matn[SDnameLn-1]) |
101 |
+ |
strcpy(sd->matn+(SDnameLn-4), "..."); |
102 |
+ |
} |
103 |
+ |
if ((geom = ezxml_child(wdb, "Manufacturer")) != NULL) { |
104 |
+ |
strncpy(sd->makr, ezxml_txt(geom), SDnameLn); |
105 |
+ |
if (sd->makr[SDnameLn-1]) |
106 |
+ |
strcpy(sd->makr+(SDnameLn-4), "..."); |
107 |
+ |
} |
108 |
|
sd->dim[0] = sd->dim[1] = sd->dim[2] = .0; |
109 |
+ |
SDerrorDetail[0] = '\0'; |
110 |
|
if ((geom = ezxml_child(wdb, "Width")) != NULL) |
111 |
|
sd->dim[0] = atof(ezxml_txt(geom)) * |
112 |
|
to_meters(ezxml_attr(geom, "unit")); |
116 |
|
if ((geom = ezxml_child(wdb, "Thickness")) != NULL) |
117 |
|
sd->dim[2] = atof(ezxml_txt(geom)) * |
118 |
|
to_meters(ezxml_attr(geom, "unit")); |
119 |
< |
if ((sd->dim[0] < .0) | (sd->dim[1] < .0) | (sd->dim[2] < .0)) { |
120 |
< |
sprintf(SDerrorDetail, "Negative size in \"%s\"", sd->name); |
119 |
> |
if ((sd->dim[0] < 0) | (sd->dim[1] < 0) | (sd->dim[2] < 0)) { |
120 |
> |
if (!SDerrorDetail[0]) |
121 |
> |
sprintf(SDerrorDetail, "Negative dimension in \"%s\"", |
122 |
> |
sd->name); |
123 |
|
return SDEdata; |
124 |
|
} |
125 |
|
if ((geom = ezxml_child(wdb, "Geometry")) == NULL || |
126 |
|
(mgfstr = ezxml_txt(geom)) == NULL) |
127 |
|
return SDEnone; |
128 |
+ |
while (isspace(*mgfstr)) |
129 |
+ |
++mgfstr; |
130 |
+ |
if (!*mgfstr) |
131 |
+ |
return SDEnone; |
132 |
|
if ((fmt = ezxml_attr(geom, "format")) != NULL && |
133 |
|
strcasecmp(fmt, "MGF")) { |
134 |
|
sprintf(SDerrorDetail, |
137 |
|
return SDEsupport; |
138 |
|
} |
139 |
|
cfact = to_meters(ezxml_attr(geom, "unit")); |
140 |
+ |
if (cfact <= 0) |
141 |
+ |
return SDEformat; |
142 |
|
sd->mgf = (char *)malloc(strlen(mgfstr)+32); |
143 |
|
if (sd->mgf == NULL) { |
144 |
|
strcpy(SDerrorDetail, "Out of memory in SDloadGeometry"); |
182 |
|
} |
183 |
|
wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer"); |
184 |
|
if (wtl == NULL) { |
185 |
< |
sprintf(SDerrorDetail, "BSDF \"%s\": no optical layer'", |
185 |
> |
sprintf(SDerrorDetail, "BSDF \"%s\": no optical layers'", |
186 |
|
sd->name); |
187 |
|
ezxml_free(fl); |
188 |
|
return SDEformat; |
189 |
|
} |
190 |
|
/* load geometry if present */ |
191 |
|
lastErr = SDloadGeometry(sd, ezxml_child(wtl, "Material")); |
192 |
< |
if (lastErr) |
192 |
> |
if (lastErr) { |
193 |
> |
ezxml_free(fl); |
194 |
|
return lastErr; |
195 |
+ |
} |
196 |
|
/* try loading variable resolution data */ |
197 |
|
lastErr = SDloadTre(sd, wtl); |
198 |
|
/* check our result */ |
199 |
< |
switch (lastErr) { |
169 |
< |
case SDEformat: |
170 |
< |
case SDEdata: |
171 |
< |
case SDEsupport: /* possibly we just tried the wrong format */ |
199 |
> |
if (lastErr == SDEsupport) /* try matrix BSDF if not tree data */ |
200 |
|
lastErr = SDloadMtx(sd, wtl); |
201 |
< |
break; |
174 |
< |
default: /* variable res. OK else serious error */ |
175 |
< |
break; |
176 |
< |
} |
201 |
> |
|
202 |
|
/* done with XML file */ |
203 |
|
ezxml_free(fl); |
204 |
|
|
216 |
|
if (sd->tf != NULL && sd->tf->maxHemi <= .001) { |
217 |
|
SDfreeSpectralDF(sd->tf); sd->tf = NULL; |
218 |
|
} |
219 |
+ |
if (sd->tb != NULL && sd->tb->maxHemi <= .001) { |
220 |
+ |
SDfreeSpectralDF(sd->tb); sd->tb = NULL; |
221 |
+ |
} |
222 |
|
/* return success */ |
223 |
|
return SDEnone; |
224 |
|
} |
247 |
|
return df; |
248 |
|
} |
249 |
|
|
250 |
+ |
/* Add component(s) to spectral distribution function */ |
251 |
+ |
SDSpectralDF * |
252 |
+ |
SDaddComponent(SDSpectralDF *odf, int nadd) |
253 |
+ |
{ |
254 |
+ |
SDSpectralDF *df; |
255 |
+ |
|
256 |
+ |
if (odf == NULL) |
257 |
+ |
return SDnewSpectralDF(nadd); |
258 |
+ |
if (nadd <= 0) |
259 |
+ |
return odf; |
260 |
+ |
df = (SDSpectralDF *)realloc(odf, sizeof(SDSpectralDF) + |
261 |
+ |
(odf->ncomp+nadd-1)*sizeof(SDComponent)); |
262 |
+ |
if (df == NULL) { |
263 |
+ |
sprintf(SDerrorDetail, |
264 |
+ |
"Cannot add %d component(s) to spectral DF", nadd); |
265 |
+ |
SDfreeSpectralDF(odf); |
266 |
+ |
return NULL; |
267 |
+ |
} |
268 |
+ |
memset(df->comp+df->ncomp, 0, nadd*sizeof(SDComponent)); |
269 |
+ |
df->ncomp += nadd; |
270 |
+ |
return df; |
271 |
+ |
} |
272 |
+ |
|
273 |
|
/* Free cached cumulative distributions for BSDF component */ |
274 |
|
void |
275 |
|
SDfreeCumulativeCache(SDSpectralDF *df) |
296 |
|
return; |
297 |
|
SDfreeCumulativeCache(df); |
298 |
|
for (n = df->ncomp; n-- > 0; ) |
299 |
< |
(*df->comp[n].func->freeSC)(df->comp[n].dist); |
299 |
> |
if (df->comp[n].dist != NULL) |
300 |
> |
(*df->comp[n].func->freeSC)(df->comp[n].dist); |
301 |
|
free(df); |
302 |
|
} |
303 |
|
|
321 |
|
|
322 |
|
/* Initialize an unused BSDF struct (simply clears to zeroes) */ |
323 |
|
void |
324 |
< |
SDclearBSDF(SDData *sd) |
324 |
> |
SDclearBSDF(SDData *sd, const char *fname) |
325 |
|
{ |
326 |
< |
if (sd != NULL) |
327 |
< |
memset(sd, 0, sizeof(SDData)); |
326 |
> |
if (sd == NULL) |
327 |
> |
return; |
328 |
> |
memset(sd, 0, sizeof(SDData)); |
329 |
> |
if (fname == NULL) |
330 |
> |
return; |
331 |
> |
SDclipName(sd->name, fname); |
332 |
|
} |
333 |
|
|
334 |
|
/* Free data associated with BSDF struct */ |
353 |
|
SDfreeSpectralDF(sd->tf); |
354 |
|
sd->tf = NULL; |
355 |
|
} |
356 |
+ |
if (sd->tb != NULL) { |
357 |
+ |
SDfreeSpectralDF(sd->tb); |
358 |
+ |
sd->tb = NULL; |
359 |
+ |
} |
360 |
|
sd->rLambFront.cieY = .0; |
361 |
|
sd->rLambFront.spec.flags = 0; |
362 |
|
sd->rLambBack.cieY = .0; |
390 |
|
sdl->next = SDcacheList; |
391 |
|
SDcacheList = sdl; |
392 |
|
|
393 |
< |
sdl->refcnt++; |
393 |
> |
sdl->refcnt = 1; |
394 |
|
return &sdl->bsdf; |
395 |
|
} |
396 |
|
|
434 |
|
for (sdl = SDcacheList; sdl != NULL; sdl = (sdLast=sdl)->next) |
435 |
|
if (&sdl->bsdf == sd) |
436 |
|
break; |
437 |
< |
if (sdl == NULL || --sdl->refcnt) |
437 |
> |
if (sdl == NULL || (sdl->refcnt -= (sdl->refcnt > 0))) |
438 |
|
return; /* missing or still in use */ |
439 |
|
/* keep unreferenced data? */ |
440 |
|
if (SDisLoaded(sd) && SDretainSet) { |
444 |
|
SDfreeCumulativeCache(sd->rf); |
445 |
|
SDfreeCumulativeCache(sd->rb); |
446 |
|
SDfreeCumulativeCache(sd->tf); |
447 |
+ |
SDfreeCumulativeCache(sd->tb); |
448 |
|
return; |
449 |
|
} |
450 |
|
/* remove from list and free */ |
458 |
|
|
459 |
|
/* Sample an individual BSDF component */ |
460 |
|
SDError |
461 |
< |
SDsampComponent(SDValue *sv, FVECT outVec, const FVECT inVec, |
401 |
< |
double randX, SDComponent *sdc) |
461 |
> |
SDsampComponent(SDValue *sv, FVECT ioVec, double randX, SDComponent *sdc) |
462 |
|
{ |
463 |
|
float coef[SDmaxCh]; |
464 |
|
SDError ec; |
465 |
+ |
FVECT inVec; |
466 |
|
const SDCDst *cd; |
467 |
|
double d; |
468 |
|
int n; |
469 |
|
/* check arguments */ |
470 |
< |
if ((sv == NULL) | (outVec == NULL) | (inVec == NULL) | (sdc == NULL)) |
470 |
> |
if ((sv == NULL) | (ioVec == NULL) | (sdc == NULL)) |
471 |
|
return SDEargument; |
472 |
|
/* get cumulative distribution */ |
473 |
+ |
VCOPY(inVec, ioVec); |
474 |
|
cd = (*sdc->func->getCDist)(inVec, sdc); |
475 |
|
if (cd == NULL) |
476 |
|
return SDEmemory; |
477 |
< |
if (cd->cTotal <= 1e-7) { /* anything to sample? */ |
477 |
> |
if (cd->cTotal <= 1e-6) { /* anything to sample? */ |
478 |
|
sv->spec = c_dfcolor; |
479 |
|
sv->cieY = .0; |
480 |
< |
memset(outVec, 0, 3*sizeof(double)); |
480 |
> |
memset(ioVec, 0, 3*sizeof(double)); |
481 |
|
return SDEnone; |
482 |
|
} |
483 |
|
sv->cieY = cd->cTotal; |
484 |
|
/* compute sample direction */ |
485 |
< |
ec = (*sdc->func->sampCDist)(outVec, randX, cd); |
485 |
> |
ec = (*sdc->func->sampCDist)(ioVec, randX, cd); |
486 |
|
if (ec) |
487 |
|
return ec; |
488 |
|
/* get BSDF color */ |
489 |
< |
n = (*sdc->func->getBSDFs)(coef, outVec, inVec, sdc->dist); |
489 |
> |
n = (*sdc->func->getBSDFs)(coef, ioVec, inVec, sdc); |
490 |
|
if (n <= 0) { |
491 |
|
strcpy(SDerrorDetail, "BSDF sample value error"); |
492 |
|
return SDEinternal; |
511 |
|
unsigned nBits; |
512 |
|
double scale; |
513 |
|
bitmask_t ndx, coord[MS_MAXDIM]; |
514 |
< |
|
514 |
> |
|
515 |
> |
if (n <= 0) /* check corner cases */ |
516 |
> |
return; |
517 |
> |
if (randX < 0) randX = 0; |
518 |
> |
else if (randX >= 1.) randX = 0.999999999999999; |
519 |
> |
if (n == 1) { |
520 |
> |
t[0] = randX; |
521 |
> |
return; |
522 |
> |
} |
523 |
|
while (n > MS_MAXDIM) /* punt for higher dimensions */ |
524 |
|
t[--n] = rand()*(1./(RAND_MAX+.5)); |
525 |
|
nBits = (8*sizeof(bitmask_t) - 1) / n; |
542 |
|
SDmultiSamp(outVec, 2, randX); |
543 |
|
SDsquare2disk(outVec, outVec[0], outVec[1]); |
544 |
|
outVec[2] = 1. - outVec[0]*outVec[0] - outVec[1]*outVec[1]; |
545 |
< |
if (outVec[2] > .0) /* a bit of paranoia */ |
545 |
> |
if (outVec[2] > 0) /* a bit of paranoia */ |
546 |
|
outVec[2] = sqrt(outVec[2]); |
547 |
|
if (!outFront) /* going out back? */ |
548 |
|
outVec[2] = -outVec[2]; |
550 |
|
|
551 |
|
/* Query projected solid angle coverage for non-diffuse BSDF direction */ |
552 |
|
SDError |
553 |
< |
SDsizeBSDF(double *projSA, const FVECT vec, int qflags, const SDData *sd) |
553 |
> |
SDsizeBSDF(double *projSA, const FVECT v1, const RREAL *v2, |
554 |
> |
int qflags, const SDData *sd) |
555 |
|
{ |
556 |
< |
SDSpectralDF *rdf; |
556 |
> |
SDSpectralDF *rdf, *tdf; |
557 |
|
SDError ec; |
558 |
|
int i; |
559 |
|
/* check arguments */ |
560 |
< |
if ((projSA == NULL) | (vec == NULL) | (sd == NULL)) |
560 |
> |
if ((projSA == NULL) | (v1 == NULL) | (sd == NULL)) |
561 |
|
return SDEargument; |
562 |
|
/* initialize extrema */ |
563 |
|
switch (qflags) { |
573 |
|
case 0: |
574 |
|
return SDEargument; |
575 |
|
} |
576 |
< |
if (vec[2] > .0) /* front surface query? */ |
576 |
> |
if (v1[2] > 0) { /* front surface query? */ |
577 |
|
rdf = sd->rf; |
578 |
< |
else |
578 |
> |
tdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
579 |
> |
} else { |
580 |
|
rdf = sd->rb; |
581 |
+ |
tdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
582 |
+ |
} |
583 |
+ |
if (v2 != NULL) /* bidirectional? */ |
584 |
+ |
if (v1[2] > 0 ^ v2[2] > 0) |
585 |
+ |
rdf = NULL; |
586 |
+ |
else |
587 |
+ |
tdf = NULL; |
588 |
|
ec = SDEdata; /* run through components */ |
589 |
|
for (i = (rdf==NULL) ? 0 : rdf->ncomp; i--; ) { |
590 |
< |
ec = (*rdf->comp[i].func->queryProjSA)(projSA, vec, qflags, |
591 |
< |
rdf->comp[i].dist); |
590 |
> |
ec = (*rdf->comp[i].func->queryProjSA)(projSA, v1, v2, |
591 |
> |
qflags, &rdf->comp[i]); |
592 |
|
if (ec) |
593 |
|
return ec; |
594 |
|
} |
595 |
< |
for (i = (sd->tf==NULL) ? 0 : sd->tf->ncomp; i--; ) { |
596 |
< |
ec = (*sd->tf->comp[i].func->queryProjSA)(projSA, vec, qflags, |
597 |
< |
sd->tf->comp[i].dist); |
595 |
> |
for (i = (tdf==NULL) ? 0 : tdf->ncomp; i--; ) { |
596 |
> |
ec = (*tdf->comp[i].func->queryProjSA)(projSA, v1, v2, |
597 |
> |
qflags, &tdf->comp[i]); |
598 |
|
if (ec) |
599 |
|
return ec; |
600 |
|
} |
618 |
|
if ((sv == NULL) | (outVec == NULL) | (inVec == NULL) | (sd == NULL)) |
619 |
|
return SDEargument; |
620 |
|
/* whose side are we on? */ |
621 |
< |
inFront = (inVec[2] > .0); |
622 |
< |
outFront = (outVec[2] > .0); |
621 |
> |
inFront = (inVec[2] > 0); |
622 |
> |
outFront = (outVec[2] > 0); |
623 |
|
/* start with diffuse portion */ |
624 |
|
if (inFront & outFront) { |
625 |
|
*sv = sd->rLambFront; |
627 |
|
} else if (!(inFront | outFront)) { |
628 |
|
*sv = sd->rLambBack; |
629 |
|
sdf = sd->rb; |
630 |
< |
} else /* inFront ^ outFront */ { |
630 |
> |
} else if (inFront) { |
631 |
|
*sv = sd->tLamb; |
632 |
< |
sdf = sd->tf; |
632 |
> |
sdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
633 |
> |
} else /* inBack */ { |
634 |
> |
*sv = sd->tLamb; |
635 |
> |
sdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
636 |
|
} |
637 |
|
sv->cieY *= 1./M_PI; |
638 |
|
/* add non-diffuse components */ |
639 |
|
i = (sdf != NULL) ? sdf->ncomp : 0; |
640 |
|
while (i-- > 0) { |
641 |
|
nch = (*sdf->comp[i].func->getBSDFs)(coef, outVec, inVec, |
642 |
< |
sdf->comp[i].dist); |
642 |
> |
&sdf->comp[i]); |
643 |
|
while (nch-- > 0) { |
644 |
|
c_cmix(&sv->spec, sv->cieY, &sv->spec, |
645 |
|
coef[nch], &sdf->comp[i].cspec[nch]); |
656 |
|
SDdirectHemi(const FVECT inVec, int sflags, const SDData *sd) |
657 |
|
{ |
658 |
|
double hsum; |
659 |
< |
SDSpectralDF *rdf; |
659 |
> |
SDSpectralDF *rdf, *tdf; |
660 |
|
const SDCDst *cd; |
661 |
|
int i; |
662 |
|
/* check arguments */ |
663 |
|
if ((inVec == NULL) | (sd == NULL)) |
664 |
|
return .0; |
665 |
|
/* gather diffuse components */ |
666 |
< |
if (inVec[2] > .0) { |
666 |
> |
if (inVec[2] > 0) { |
667 |
|
hsum = sd->rLambFront.cieY; |
668 |
|
rdf = sd->rf; |
669 |
+ |
tdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
670 |
|
} else /* !inFront */ { |
671 |
|
hsum = sd->rLambBack.cieY; |
672 |
|
rdf = sd->rb; |
673 |
+ |
tdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
674 |
|
} |
675 |
|
if ((sflags & SDsampDf+SDsampR) != SDsampDf+SDsampR) |
676 |
|
hsum = .0; |
677 |
|
if ((sflags & SDsampDf+SDsampT) == SDsampDf+SDsampT) |
678 |
|
hsum += sd->tLamb.cieY; |
679 |
|
/* gather non-diffuse components */ |
680 |
< |
i = ((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR && |
681 |
< |
rdf != NULL) ? rdf->ncomp : 0; |
680 |
> |
i = (((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR) & |
681 |
> |
(rdf != NULL)) ? rdf->ncomp : 0; |
682 |
|
while (i-- > 0) { /* non-diffuse reflection */ |
683 |
|
cd = (*rdf->comp[i].func->getCDist)(inVec, &rdf->comp[i]); |
684 |
|
if (cd != NULL) |
685 |
|
hsum += cd->cTotal; |
686 |
|
} |
687 |
< |
i = ((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT && |
688 |
< |
sd->tf != NULL) ? sd->tf->ncomp : 0; |
687 |
> |
i = (((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT) & |
688 |
> |
(tdf != NULL)) ? tdf->ncomp : 0; |
689 |
|
while (i-- > 0) { /* non-diffuse transmission */ |
690 |
< |
cd = (*sd->tf->comp[i].func->getCDist)(inVec, &sd->tf->comp[i]); |
690 |
> |
cd = (*tdf->comp[i].func->getCDist)(inVec, &tdf->comp[i]); |
691 |
|
if (cd != NULL) |
692 |
|
hsum += cd->cTotal; |
693 |
|
} |
696 |
|
|
697 |
|
/* Sample BSDF direction based on the given random variable */ |
698 |
|
SDError |
699 |
< |
SDsampBSDF(SDValue *sv, FVECT outVec, const FVECT inVec, |
616 |
< |
double randX, int sflags, const SDData *sd) |
699 |
> |
SDsampBSDF(SDValue *sv, FVECT ioVec, double randX, int sflags, const SDData *sd) |
700 |
|
{ |
701 |
|
SDError ec; |
702 |
+ |
FVECT inVec; |
703 |
|
int inFront; |
704 |
< |
SDSpectralDF *rdf; |
704 |
> |
SDSpectralDF *rdf, *tdf; |
705 |
|
double rdiff; |
706 |
|
float coef[SDmaxCh]; |
707 |
|
int i, j, n, nr; |
708 |
|
SDComponent *sdc; |
709 |
|
const SDCDst **cdarr = NULL; |
710 |
|
/* check arguments */ |
711 |
< |
if ((sv == NULL) | (outVec == NULL) | (inVec == NULL) | (sd == NULL) | |
712 |
< |
(randX < .0) | (randX >= 1.)) |
711 |
> |
if ((sv == NULL) | (ioVec == NULL) | (sd == NULL) | |
712 |
> |
(randX < 0) | (randX >= 1.)) |
713 |
|
return SDEargument; |
714 |
|
/* whose side are we on? */ |
715 |
< |
inFront = (inVec[2] > .0); |
715 |
> |
VCOPY(inVec, ioVec); |
716 |
> |
inFront = (inVec[2] > 0); |
717 |
|
/* remember diffuse portions */ |
718 |
|
if (inFront) { |
719 |
|
*sv = sd->rLambFront; |
720 |
|
rdf = sd->rf; |
721 |
+ |
tdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
722 |
|
} else /* !inFront */ { |
723 |
|
*sv = sd->rLambBack; |
724 |
|
rdf = sd->rb; |
725 |
+ |
tdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
726 |
|
} |
727 |
|
if ((sflags & SDsampDf+SDsampR) != SDsampDf+SDsampR) |
728 |
|
sv->cieY = .0; |
730 |
|
if ((sflags & SDsampDf+SDsampT) == SDsampDf+SDsampT) |
731 |
|
sv->cieY += sd->tLamb.cieY; |
732 |
|
/* gather non-diffuse components */ |
733 |
< |
i = nr = ((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR && |
734 |
< |
rdf != NULL) ? rdf->ncomp : 0; |
735 |
< |
j = ((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT && |
736 |
< |
sd->tf != NULL) ? sd->tf->ncomp : 0; |
733 |
> |
i = nr = (((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR) & |
734 |
> |
(rdf != NULL)) ? rdf->ncomp : 0; |
735 |
> |
j = (((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT) & |
736 |
> |
(tdf != NULL)) ? tdf->ncomp : 0; |
737 |
|
n = i + j; |
738 |
|
if (n > 0 && (cdarr = (const SDCDst **)malloc(n*sizeof(SDCDst *))) == NULL) |
739 |
|
return SDEmemory; |
740 |
|
while (j-- > 0) { /* non-diffuse transmission */ |
741 |
< |
cdarr[i+j] = (*sd->tf->comp[j].func->getCDist)(inVec, &sd->tf->comp[j]); |
741 |
> |
cdarr[i+j] = (*tdf->comp[j].func->getCDist)(inVec, &tdf->comp[j]); |
742 |
|
if (cdarr[i+j] == NULL) { |
743 |
|
free(cdarr); |
744 |
|
return SDEmemory; |
753 |
|
} |
754 |
|
sv->cieY += cdarr[i]->cTotal; |
755 |
|
} |
756 |
< |
if (sv->cieY <= 1e-7) { /* anything to sample? */ |
756 |
> |
if (sv->cieY <= 1e-6) { /* anything to sample? */ |
757 |
|
sv->cieY = .0; |
758 |
< |
memset(outVec, 0, 3*sizeof(double)); |
758 |
> |
memset(ioVec, 0, 3*sizeof(double)); |
759 |
|
return SDEnone; |
760 |
|
} |
761 |
|
/* scale random variable */ |
762 |
|
randX *= sv->cieY; |
763 |
|
/* diffuse reflection? */ |
764 |
|
if (randX < rdiff) { |
765 |
< |
SDdiffuseSamp(outVec, inFront, randX/rdiff); |
765 |
> |
SDdiffuseSamp(ioVec, inFront, randX/rdiff); |
766 |
|
goto done; |
767 |
|
} |
768 |
|
randX -= rdiff; |
770 |
|
if ((sflags & SDsampDf+SDsampT) == SDsampDf+SDsampT) { |
771 |
|
if (randX < sd->tLamb.cieY) { |
772 |
|
sv->spec = sd->tLamb.spec; |
773 |
< |
SDdiffuseSamp(outVec, !inFront, randX/sd->tLamb.cieY); |
773 |
> |
SDdiffuseSamp(ioVec, !inFront, randX/sd->tLamb.cieY); |
774 |
|
goto done; |
775 |
|
} |
776 |
|
randX -= sd->tLamb.cieY; |
781 |
|
if (i >= n) |
782 |
|
return SDEinternal; |
783 |
|
/* compute sample direction */ |
784 |
< |
sdc = (i < nr) ? &rdf->comp[i] : &sd->tf->comp[i-nr]; |
785 |
< |
ec = (*sdc->func->sampCDist)(outVec, randX/cdarr[i]->cTotal, cdarr[i]); |
784 |
> |
sdc = (i < nr) ? &rdf->comp[i] : &tdf->comp[i-nr]; |
785 |
> |
ec = (*sdc->func->sampCDist)(ioVec, randX/cdarr[i]->cTotal, cdarr[i]); |
786 |
|
if (ec) |
787 |
|
return ec; |
788 |
|
/* compute color */ |
789 |
< |
j = (*sdc->func->getBSDFs)(coef, outVec, inVec, sdc->dist); |
789 |
> |
j = (*sdc->func->getBSDFs)(coef, ioVec, inVec, sdc); |
790 |
|
if (j <= 0) { |
791 |
|
sprintf(SDerrorDetail, "BSDF \"%s\" sampling value error", |
792 |
|
sd->name); |
813 |
|
if ((vMtx == NULL) | (sNrm == NULL) | (uVec == NULL)) |
814 |
|
return SDEargument; |
815 |
|
VCOPY(vMtx[2], sNrm); |
816 |
< |
if (normalize(vMtx[2]) == .0) |
816 |
> |
if (normalize(vMtx[2]) == 0) |
817 |
|
return SDEargument; |
818 |
|
fcross(vMtx[0], uVec, vMtx[2]); |
819 |
< |
if (normalize(vMtx[0]) == .0) |
819 |
> |
if (normalize(vMtx[0]) == 0) |
820 |
|
return SDEargument; |
821 |
|
fcross(vMtx[1], vMtx[2], vMtx[0]); |
822 |
|
return SDEnone; |
836 |
|
mTmp[0][1] = vMtx[2][1]*vMtx[0][2] - vMtx[2][2]*vMtx[0][1]; |
837 |
|
mTmp[0][2] = vMtx[1][2]*vMtx[0][1] - vMtx[1][1]*vMtx[0][2]; |
838 |
|
d = vMtx[0][0]*mTmp[0][0] + vMtx[1][0]*mTmp[0][1] + vMtx[2][0]*mTmp[0][2]; |
839 |
< |
if (d == .0) { |
839 |
> |
if (d == 0) { |
840 |
|
strcpy(SDerrorDetail, "Zero determinant in matrix inversion"); |
841 |
|
return SDEargument; |
842 |
|
} |
863 |
|
if (vMtx == NULL) { /* assume they just want to normalize */ |
864 |
|
if (resVec != inpVec) |
865 |
|
VCOPY(resVec, inpVec); |
866 |
< |
return (normalize(resVec) > .0) ? SDEnone : SDEargument; |
866 |
> |
return (normalize(resVec) > 0) ? SDEnone : SDEargument; |
867 |
|
} |
868 |
|
vTmp[0] = DOT(vMtx[0], inpVec); |
869 |
|
vTmp[1] = DOT(vMtx[1], inpVec); |
870 |
|
vTmp[2] = DOT(vMtx[2], inpVec); |
871 |
< |
if (normalize(vTmp) == .0) |
871 |
> |
if (normalize(vTmp) == 0) |
872 |
|
return SDEargument; |
873 |
|
VCOPY(resVec, vTmp); |
874 |
|
return SDEnone; |
883 |
|
|
884 |
|
#include "standard.h" |
885 |
|
#include "paths.h" |
799 |
– |
#include <ctype.h> |
886 |
|
|
887 |
|
#define MAXLATS 46 /* maximum number of latitudes */ |
888 |
|
|
939 |
|
static int |
940 |
|
fequal(double a, double b) |
941 |
|
{ |
942 |
< |
if (b != .0) |
942 |
> |
if (b != 0) |
943 |
|
a = a/b - 1.; |
944 |
|
return((a <= 1e-6) & (a >= -1e-6)); |
945 |
|
} |
1002 |
|
{ |
1003 |
|
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
1004 |
|
int li, ndx; |
1005 |
< |
double pol, azi, d; |
1005 |
> |
double pol, azi; |
1006 |
|
|
1007 |
|
if ((v[2] < -1.0) | (v[2] > 1.0)) |
1008 |
|
return(-1); |
1242 |
|
) |
1243 |
|
{ |
1244 |
|
double *omega_iarr, *omega_oarr; |
1245 |
< |
double dom, contrib, hemi_total, full_total; |
1245 |
> |
double dom, hemi_total, full_total; |
1246 |
|
int nneg; |
1247 |
|
FVECT v; |
1248 |
|
int i, o; |
1257 |
|
hemi_total = .0; |
1258 |
|
for (i = dp->ninc; i--; ) { |
1259 |
|
dom = getBSDF_incohm(dp,i); |
1260 |
< |
if (dom <= .0) { |
1260 |
> |
if (dom <= 0) { |
1261 |
|
error(WARNING, "zero/negative incoming solid angle"); |
1262 |
|
continue; |
1263 |
|
} |
1280 |
|
hemi_total = .0; |
1281 |
|
for (o = dp->nout; o--; ) { |
1282 |
|
dom = getBSDF_outohm(dp,o); |
1283 |
< |
if (dom <= .0) { |
1283 |
> |
if (dom <= 0) { |
1284 |
|
error(WARNING, "zero/negative outgoing solid angle"); |
1285 |
|
continue; |
1286 |
|
} |
1304 |
|
hemi_total = .0; |
1305 |
|
for (o = dp->nout; o--; ) { |
1306 |
|
double f = BSDF_value(dp,i,o); |
1307 |
< |
if (f >= .0) |
1307 |
> |
if (f >= 0) |
1308 |
|
hemi_total += f*omega_oarr[o]; |
1309 |
|
else { |
1310 |
|
nneg += (f < -FTINY); |
1392 |
|
error(WARNING, errmsg); |
1393 |
|
ezxml_free(fl); |
1394 |
|
return(NULL); |
1395 |
< |
} |
1396 |
< |
load_angle_basis(ezxml_child(ezxml_child(wtl, |
1397 |
< |
"DataDefinition"), "AngleBasis")); |
1395 |
> |
} |
1396 |
> |
for (wld = ezxml_child(ezxml_child(wtl, |
1397 |
> |
"DataDefinition"), "AngleBasis"); |
1398 |
> |
wld != NULL; wld = wld->next) |
1399 |
> |
load_angle_basis(wld); |
1400 |
|
dp = (struct BSDF_data *)calloc(1, sizeof(struct BSDF_data)); |
1401 |
|
load_geometry(dp, ezxml_child(wtl, "Material")); |
1402 |
|
for (wld = ezxml_child(wtl, "WavelengthData"); |
1457 |
|
if (!getBSDF_incvec(v, b, i)) |
1458 |
|
return(0); |
1459 |
|
rad = sqrt(getBSDF_incohm(b, i) / PI); |
1460 |
< |
multisamp(pert, 3, rv); |
1460 |
> |
SDmultiSamp(pert, 3, rv); |
1461 |
|
for (j = 0; j < 3; j++) |
1462 |
|
v[j] += rad*(2.*pert[j] - 1.); |
1463 |
|
if (xm != NULL) |
1482 |
|
if (!getBSDF_outvec(v, b, o)) |
1483 |
|
return(0); |
1484 |
|
rad = sqrt(getBSDF_outohm(b, o) / PI); |
1485 |
< |
multisamp(pert, 3, rv); |
1485 |
> |
SDmultiSamp(pert, 3, rv); |
1486 |
|
for (j = 0; j < 3; j++) |
1487 |
|
v[j] += rad*(2.*pert[j] - 1.); |
1488 |
|
if (xm != NULL) |