| 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 |
|
|
| 87 |
|
|
| 88 |
|
/* Load geometric dimensions and description (if any) */ |
| 89 |
|
static SDError |
| 90 |
< |
SDloadGeometry(SDData *sd, ezxml_t wdb) |
| 90 |
> |
SDloadGeometry(SDData *sd, ezxml_t wtl) |
| 91 |
|
{ |
| 92 |
< |
ezxml_t geom; |
| 92 |
> |
ezxml_t node, matl, geom; |
| 93 |
|
double cfact; |
| 94 |
< |
const char *fmt, *mgfstr; |
| 94 |
> |
const char *fmt = NULL, *mgfstr; |
| 95 |
|
|
| 96 |
< |
if (wdb == NULL) /* no geometry section? */ |
| 97 |
< |
return SDEnone; |
| 98 |
< |
sd->dim[0] = sd->dim[1] = sd->dim[2] = .0; |
| 99 |
< |
if ((geom = ezxml_child(wdb, "Width")) != NULL) |
| 100 |
< |
sd->dim[0] = atof(ezxml_txt(geom)) * |
| 101 |
< |
to_meters(ezxml_attr(geom, "unit")); |
| 102 |
< |
if ((geom = ezxml_child(wdb, "Height")) != NULL) |
| 103 |
< |
sd->dim[1] = atof(ezxml_txt(geom)) * |
| 104 |
< |
to_meters(ezxml_attr(geom, "unit")); |
| 105 |
< |
if ((geom = ezxml_child(wdb, "Thickness")) != NULL) |
| 106 |
< |
sd->dim[2] = atof(ezxml_txt(geom)) * |
| 107 |
< |
to_meters(ezxml_attr(geom, "unit")); |
| 108 |
< |
if ((sd->dim[0] < 0) | (sd->dim[1] < 0) | (sd->dim[2] < 0)) { |
| 109 |
< |
sprintf(SDerrorDetail, "Negative size in \"%s\"", sd->name); |
| 110 |
< |
return SDEdata; |
| 96 |
> |
SDerrorDetail[0] = '\0'; |
| 97 |
> |
sd->matn[0] = '\0'; sd->makr[0] = '\0'; |
| 98 |
> |
sd->dim[0] = sd->dim[1] = sd->dim[2] = 0; |
| 99 |
> |
matl = ezxml_child(wtl, "Material"); |
| 100 |
> |
if (matl != NULL) { /* get material info. */ |
| 101 |
> |
if ((node = ezxml_child(matl, "Name")) != NULL) { |
| 102 |
> |
strncpy(sd->matn, ezxml_txt(node), SDnameLn); |
| 103 |
> |
if (sd->matn[SDnameLn-1]) |
| 104 |
> |
strcpy(sd->matn+(SDnameLn-4), "..."); |
| 105 |
> |
} |
| 106 |
> |
if ((node = ezxml_child(matl, "Manufacturer")) != NULL) { |
| 107 |
> |
strncpy(sd->makr, ezxml_txt(node), SDnameLn); |
| 108 |
> |
if (sd->makr[SDnameLn-1]) |
| 109 |
> |
strcpy(sd->makr+(SDnameLn-4), "..."); |
| 110 |
> |
} |
| 111 |
> |
if ((node = ezxml_child(matl, "Width")) != NULL) |
| 112 |
> |
sd->dim[0] = atof(ezxml_txt(node)) * |
| 113 |
> |
to_meters(ezxml_attr(node, "unit")); |
| 114 |
> |
if ((node = ezxml_child(matl, "Height")) != NULL) |
| 115 |
> |
sd->dim[1] = atof(ezxml_txt(node)) * |
| 116 |
> |
to_meters(ezxml_attr(node, "unit")); |
| 117 |
> |
if ((node = ezxml_child(matl, "Thickness")) != NULL) |
| 118 |
> |
sd->dim[2] = atof(ezxml_txt(node)) * |
| 119 |
> |
to_meters(ezxml_attr(node, "unit")); |
| 120 |
> |
if ((sd->dim[0] < 0) | (sd->dim[1] < 0) | (sd->dim[2] < 0)) { |
| 121 |
> |
if (!SDerrorDetail[0]) |
| 122 |
> |
sprintf(SDerrorDetail, "Negative dimension in \"%s\"", |
| 123 |
> |
sd->name); |
| 124 |
> |
return SDEdata; |
| 125 |
> |
} |
| 126 |
|
} |
| 127 |
< |
if ((geom = ezxml_child(wdb, "Geometry")) == NULL || |
| 128 |
< |
(mgfstr = ezxml_txt(geom)) == NULL) |
| 127 |
> |
sd->mgf = NULL; |
| 128 |
> |
geom = ezxml_child(wtl, "Geometry"); |
| 129 |
> |
if (geom == NULL) /* no actual geometry? */ |
| 130 |
|
return SDEnone; |
| 131 |
< |
while (isspace(*mgfstr)) |
| 132 |
< |
++mgfstr; |
| 114 |
< |
if (!*mgfstr) |
| 115 |
< |
return SDEnone; |
| 116 |
< |
if ((fmt = ezxml_attr(geom, "format")) != NULL && |
| 117 |
< |
strcasecmp(fmt, "MGF")) { |
| 131 |
> |
fmt = ezxml_attr(geom, "format"); |
| 132 |
> |
if (fmt != NULL && strcasecmp(fmt, "MGF")) { |
| 133 |
|
sprintf(SDerrorDetail, |
| 134 |
|
"Unrecognized geometry format '%s' in \"%s\"", |
| 135 |
|
fmt, sd->name); |
| 136 |
|
return SDEsupport; |
| 137 |
|
} |
| 138 |
< |
cfact = to_meters(ezxml_attr(geom, "unit")); |
| 138 |
> |
if ((node = ezxml_child(geom, "MGFblock")) == NULL || |
| 139 |
> |
(mgfstr = ezxml_txt(node)) == NULL) |
| 140 |
> |
return SDEnone; |
| 141 |
> |
while (isspace(*mgfstr)) |
| 142 |
> |
++mgfstr; |
| 143 |
> |
if (!*mgfstr) |
| 144 |
> |
return SDEnone; |
| 145 |
> |
cfact = to_meters(ezxml_attr(node, "unit")); |
| 146 |
> |
if (cfact <= 0) |
| 147 |
> |
return SDEformat; |
| 148 |
|
sd->mgf = (char *)malloc(strlen(mgfstr)+32); |
| 149 |
|
if (sd->mgf == NULL) { |
| 150 |
|
strcpy(SDerrorDetail, "Out of memory in SDloadGeometry"); |
| 186 |
|
ezxml_free(fl); |
| 187 |
|
return SDEformat; |
| 188 |
|
} |
| 189 |
+ |
wtl = ezxml_child(fl, "FileType"); |
| 190 |
+ |
if (wtl != NULL && strcmp(ezxml_txt(wtl), "BSDF")) { |
| 191 |
+ |
sprintf(SDerrorDetail, |
| 192 |
+ |
"XML \"%s\": wrong FileType (must be 'BSDF')", |
| 193 |
+ |
sd->name); |
| 194 |
+ |
ezxml_free(fl); |
| 195 |
+ |
return SDEformat; |
| 196 |
+ |
} |
| 197 |
|
wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer"); |
| 198 |
|
if (wtl == NULL) { |
| 199 |
< |
sprintf(SDerrorDetail, "BSDF \"%s\": no optical layer'", |
| 199 |
> |
sprintf(SDerrorDetail, "BSDF \"%s\": no optical layers'", |
| 200 |
|
sd->name); |
| 201 |
|
ezxml_free(fl); |
| 202 |
|
return SDEformat; |
| 203 |
|
} |
| 204 |
|
/* load geometry if present */ |
| 205 |
< |
lastErr = SDloadGeometry(sd, ezxml_child(wtl, "Material")); |
| 206 |
< |
if (lastErr) |
| 205 |
> |
lastErr = SDloadGeometry(sd, wtl); |
| 206 |
> |
if (lastErr) { |
| 207 |
> |
ezxml_free(fl); |
| 208 |
|
return lastErr; |
| 209 |
+ |
} |
| 210 |
|
/* try loading variable resolution data */ |
| 211 |
|
lastErr = SDloadTre(sd, wtl); |
| 212 |
|
/* check our result */ |
| 230 |
|
if (sd->tf != NULL && sd->tf->maxHemi <= .001) { |
| 231 |
|
SDfreeSpectralDF(sd->tf); sd->tf = NULL; |
| 232 |
|
} |
| 233 |
+ |
if (sd->tb != NULL && sd->tb->maxHemi <= .001) { |
| 234 |
+ |
SDfreeSpectralDF(sd->tb); sd->tb = NULL; |
| 235 |
+ |
} |
| 236 |
|
/* return success */ |
| 237 |
|
return SDEnone; |
| 238 |
|
} |
| 261 |
|
return df; |
| 262 |
|
} |
| 263 |
|
|
| 264 |
+ |
/* Add component(s) to spectral distribution function */ |
| 265 |
+ |
SDSpectralDF * |
| 266 |
+ |
SDaddComponent(SDSpectralDF *odf, int nadd) |
| 267 |
+ |
{ |
| 268 |
+ |
SDSpectralDF *df; |
| 269 |
+ |
|
| 270 |
+ |
if (odf == NULL) |
| 271 |
+ |
return SDnewSpectralDF(nadd); |
| 272 |
+ |
if (nadd <= 0) |
| 273 |
+ |
return odf; |
| 274 |
+ |
df = (SDSpectralDF *)realloc(odf, sizeof(SDSpectralDF) + |
| 275 |
+ |
(odf->ncomp+nadd-1)*sizeof(SDComponent)); |
| 276 |
+ |
if (df == NULL) { |
| 277 |
+ |
sprintf(SDerrorDetail, |
| 278 |
+ |
"Cannot add %d component(s) to spectral DF", nadd); |
| 279 |
+ |
SDfreeSpectralDF(odf); |
| 280 |
+ |
return NULL; |
| 281 |
+ |
} |
| 282 |
+ |
memset(df->comp+df->ncomp, 0, nadd*sizeof(SDComponent)); |
| 283 |
+ |
df->ncomp += nadd; |
| 284 |
+ |
return df; |
| 285 |
+ |
} |
| 286 |
+ |
|
| 287 |
|
/* Free cached cumulative distributions for BSDF component */ |
| 288 |
|
void |
| 289 |
|
SDfreeCumulativeCache(SDSpectralDF *df) |
| 310 |
|
return; |
| 311 |
|
SDfreeCumulativeCache(df); |
| 312 |
|
for (n = df->ncomp; n-- > 0; ) |
| 313 |
< |
(*df->comp[n].func->freeSC)(df->comp[n].dist); |
| 313 |
> |
if (df->comp[n].dist != NULL) |
| 314 |
> |
(*df->comp[n].func->freeSC)(df->comp[n].dist); |
| 315 |
|
free(df); |
| 316 |
|
} |
| 317 |
|
|
| 367 |
|
SDfreeSpectralDF(sd->tf); |
| 368 |
|
sd->tf = NULL; |
| 369 |
|
} |
| 370 |
+ |
if (sd->tb != NULL) { |
| 371 |
+ |
SDfreeSpectralDF(sd->tb); |
| 372 |
+ |
sd->tb = NULL; |
| 373 |
+ |
} |
| 374 |
|
sd->rLambFront.cieY = .0; |
| 375 |
|
sd->rLambFront.spec.flags = 0; |
| 376 |
|
sd->rLambBack.cieY = .0; |
| 458 |
|
SDfreeCumulativeCache(sd->rf); |
| 459 |
|
SDfreeCumulativeCache(sd->rb); |
| 460 |
|
SDfreeCumulativeCache(sd->tf); |
| 461 |
+ |
SDfreeCumulativeCache(sd->tb); |
| 462 |
|
return; |
| 463 |
|
} |
| 464 |
|
/* remove from list and free */ |
| 488 |
|
cd = (*sdc->func->getCDist)(inVec, sdc); |
| 489 |
|
if (cd == NULL) |
| 490 |
|
return SDEmemory; |
| 491 |
< |
if (cd->cTotal <= 1e-7) { /* anything to sample? */ |
| 491 |
> |
if (cd->cTotal <= 1e-6) { /* anything to sample? */ |
| 492 |
|
sv->spec = c_dfcolor; |
| 493 |
|
sv->cieY = .0; |
| 494 |
|
memset(ioVec, 0, 3*sizeof(double)); |
| 525 |
|
unsigned nBits; |
| 526 |
|
double scale; |
| 527 |
|
bitmask_t ndx, coord[MS_MAXDIM]; |
| 528 |
< |
|
| 528 |
> |
|
| 529 |
> |
if (n <= 0) /* check corner cases */ |
| 530 |
> |
return; |
| 531 |
> |
if (randX < 0) randX = 0; |
| 532 |
> |
else if (randX >= 1.) randX = 0.999999999999999; |
| 533 |
> |
if (n == 1) { |
| 534 |
> |
t[0] = randX; |
| 535 |
> |
return; |
| 536 |
> |
} |
| 537 |
|
while (n > MS_MAXDIM) /* punt for higher dimensions */ |
| 538 |
|
t[--n] = rand()*(1./(RAND_MAX+.5)); |
| 539 |
|
nBits = (8*sizeof(bitmask_t) - 1) / n; |
| 587 |
|
case 0: |
| 588 |
|
return SDEargument; |
| 589 |
|
} |
| 590 |
< |
if (v1[2] > 0) /* front surface query? */ |
| 590 |
> |
if (v1[2] > 0) { /* front surface query? */ |
| 591 |
|
rdf = sd->rf; |
| 592 |
< |
else |
| 592 |
> |
tdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
| 593 |
> |
} else { |
| 594 |
|
rdf = sd->rb; |
| 595 |
< |
tdf = sd->tf; |
| 595 |
> |
tdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
| 596 |
> |
} |
| 597 |
|
if (v2 != NULL) /* bidirectional? */ |
| 598 |
|
if (v1[2] > 0 ^ v2[2] > 0) |
| 599 |
|
rdf = NULL; |
| 641 |
|
} else if (!(inFront | outFront)) { |
| 642 |
|
*sv = sd->rLambBack; |
| 643 |
|
sdf = sd->rb; |
| 644 |
< |
} else /* inFront ^ outFront */ { |
| 644 |
> |
} else if (inFront) { |
| 645 |
|
*sv = sd->tLamb; |
| 646 |
< |
sdf = sd->tf; |
| 646 |
> |
sdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
| 647 |
> |
} else /* inBack */ { |
| 648 |
> |
*sv = sd->tLamb; |
| 649 |
> |
sdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
| 650 |
|
} |
| 651 |
|
sv->cieY *= 1./M_PI; |
| 652 |
|
/* add non-diffuse components */ |
| 670 |
|
SDdirectHemi(const FVECT inVec, int sflags, const SDData *sd) |
| 671 |
|
{ |
| 672 |
|
double hsum; |
| 673 |
< |
SDSpectralDF *rdf; |
| 673 |
> |
SDSpectralDF *rdf, *tdf; |
| 674 |
|
const SDCDst *cd; |
| 675 |
|
int i; |
| 676 |
|
/* check arguments */ |
| 680 |
|
if (inVec[2] > 0) { |
| 681 |
|
hsum = sd->rLambFront.cieY; |
| 682 |
|
rdf = sd->rf; |
| 683 |
+ |
tdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
| 684 |
|
} else /* !inFront */ { |
| 685 |
|
hsum = sd->rLambBack.cieY; |
| 686 |
|
rdf = sd->rb; |
| 687 |
+ |
tdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
| 688 |
|
} |
| 689 |
|
if ((sflags & SDsampDf+SDsampR) != SDsampDf+SDsampR) |
| 690 |
|
hsum = .0; |
| 691 |
|
if ((sflags & SDsampDf+SDsampT) == SDsampDf+SDsampT) |
| 692 |
|
hsum += sd->tLamb.cieY; |
| 693 |
|
/* gather non-diffuse components */ |
| 694 |
< |
i = ((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR && |
| 695 |
< |
rdf != NULL) ? rdf->ncomp : 0; |
| 694 |
> |
i = (((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR) & |
| 695 |
> |
(rdf != NULL)) ? rdf->ncomp : 0; |
| 696 |
|
while (i-- > 0) { /* non-diffuse reflection */ |
| 697 |
|
cd = (*rdf->comp[i].func->getCDist)(inVec, &rdf->comp[i]); |
| 698 |
|
if (cd != NULL) |
| 699 |
|
hsum += cd->cTotal; |
| 700 |
|
} |
| 701 |
< |
i = ((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT && |
| 702 |
< |
sd->tf != NULL) ? sd->tf->ncomp : 0; |
| 701 |
> |
i = (((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT) & |
| 702 |
> |
(tdf != NULL)) ? tdf->ncomp : 0; |
| 703 |
|
while (i-- > 0) { /* non-diffuse transmission */ |
| 704 |
< |
cd = (*sd->tf->comp[i].func->getCDist)(inVec, &sd->tf->comp[i]); |
| 704 |
> |
cd = (*tdf->comp[i].func->getCDist)(inVec, &tdf->comp[i]); |
| 705 |
|
if (cd != NULL) |
| 706 |
|
hsum += cd->cTotal; |
| 707 |
|
} |
| 715 |
|
SDError ec; |
| 716 |
|
FVECT inVec; |
| 717 |
|
int inFront; |
| 718 |
< |
SDSpectralDF *rdf; |
| 718 |
> |
SDSpectralDF *rdf, *tdf; |
| 719 |
|
double rdiff; |
| 720 |
|
float coef[SDmaxCh]; |
| 721 |
|
int i, j, n, nr; |
| 732 |
|
if (inFront) { |
| 733 |
|
*sv = sd->rLambFront; |
| 734 |
|
rdf = sd->rf; |
| 735 |
+ |
tdf = (sd->tf != NULL) ? sd->tf : sd->tb; |
| 736 |
|
} else /* !inFront */ { |
| 737 |
|
*sv = sd->rLambBack; |
| 738 |
|
rdf = sd->rb; |
| 739 |
+ |
tdf = (sd->tb != NULL) ? sd->tb : sd->tf; |
| 740 |
|
} |
| 741 |
|
if ((sflags & SDsampDf+SDsampR) != SDsampDf+SDsampR) |
| 742 |
|
sv->cieY = .0; |
| 744 |
|
if ((sflags & SDsampDf+SDsampT) == SDsampDf+SDsampT) |
| 745 |
|
sv->cieY += sd->tLamb.cieY; |
| 746 |
|
/* gather non-diffuse components */ |
| 747 |
< |
i = nr = ((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR && |
| 748 |
< |
rdf != NULL) ? rdf->ncomp : 0; |
| 749 |
< |
j = ((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT && |
| 750 |
< |
sd->tf != NULL) ? sd->tf->ncomp : 0; |
| 747 |
> |
i = nr = (((sflags & SDsampSp+SDsampR) == SDsampSp+SDsampR) & |
| 748 |
> |
(rdf != NULL)) ? rdf->ncomp : 0; |
| 749 |
> |
j = (((sflags & SDsampSp+SDsampT) == SDsampSp+SDsampT) & |
| 750 |
> |
(tdf != NULL)) ? tdf->ncomp : 0; |
| 751 |
|
n = i + j; |
| 752 |
|
if (n > 0 && (cdarr = (const SDCDst **)malloc(n*sizeof(SDCDst *))) == NULL) |
| 753 |
|
return SDEmemory; |
| 754 |
|
while (j-- > 0) { /* non-diffuse transmission */ |
| 755 |
< |
cdarr[i+j] = (*sd->tf->comp[j].func->getCDist)(inVec, &sd->tf->comp[j]); |
| 755 |
> |
cdarr[i+j] = (*tdf->comp[j].func->getCDist)(inVec, &tdf->comp[j]); |
| 756 |
|
if (cdarr[i+j] == NULL) { |
| 757 |
|
free(cdarr); |
| 758 |
|
return SDEmemory; |
| 767 |
|
} |
| 768 |
|
sv->cieY += cdarr[i]->cTotal; |
| 769 |
|
} |
| 770 |
< |
if (sv->cieY <= 1e-7) { /* anything to sample? */ |
| 770 |
> |
if (sv->cieY <= 1e-6) { /* anything to sample? */ |
| 771 |
|
sv->cieY = .0; |
| 772 |
|
memset(ioVec, 0, 3*sizeof(double)); |
| 773 |
|
return SDEnone; |
| 795 |
|
if (i >= n) |
| 796 |
|
return SDEinternal; |
| 797 |
|
/* compute sample direction */ |
| 798 |
< |
sdc = (i < nr) ? &rdf->comp[i] : &sd->tf->comp[i-nr]; |
| 798 |
> |
sdc = (i < nr) ? &rdf->comp[i] : &tdf->comp[i-nr]; |
| 799 |
|
ec = (*sdc->func->sampCDist)(ioVec, randX/cdarr[i]->cTotal, cdarr[i]); |
| 800 |
|
if (ec) |
| 801 |
|
return ec; |
| 887 |
|
VCOPY(resVec, vTmp); |
| 888 |
|
return SDEnone; |
| 889 |
|
} |
| 807 |
– |
|
| 808 |
– |
/*################################################################*/ |
| 809 |
– |
/*######### DEPRECATED ROUTINES AWAITING PERMANENT REMOVAL #######*/ |
| 810 |
– |
|
| 811 |
– |
/* |
| 812 |
– |
* Routines for handling BSDF data |
| 813 |
– |
*/ |
| 814 |
– |
|
| 815 |
– |
#include "standard.h" |
| 816 |
– |
#include "paths.h" |
| 817 |
– |
|
| 818 |
– |
#define MAXLATS 46 /* maximum number of latitudes */ |
| 819 |
– |
|
| 820 |
– |
/* BSDF angle specification */ |
| 821 |
– |
typedef struct { |
| 822 |
– |
char name[64]; /* basis name */ |
| 823 |
– |
int nangles; /* total number of directions */ |
| 824 |
– |
struct { |
| 825 |
– |
float tmin; /* starting theta */ |
| 826 |
– |
short nphis; /* number of phis (0 term) */ |
| 827 |
– |
} lat[MAXLATS+1]; /* latitudes */ |
| 828 |
– |
} ANGLE_BASIS; |
| 829 |
– |
|
| 830 |
– |
#define MAXABASES 7 /* limit on defined bases */ |
| 831 |
– |
|
| 832 |
– |
static ANGLE_BASIS abase_list[MAXABASES] = { |
| 833 |
– |
{ |
| 834 |
– |
"LBNL/Klems Full", 145, |
| 835 |
– |
{ {-5., 1}, |
| 836 |
– |
{5., 8}, |
| 837 |
– |
{15., 16}, |
| 838 |
– |
{25., 20}, |
| 839 |
– |
{35., 24}, |
| 840 |
– |
{45., 24}, |
| 841 |
– |
{55., 24}, |
| 842 |
– |
{65., 16}, |
| 843 |
– |
{75., 12}, |
| 844 |
– |
{90., 0} } |
| 845 |
– |
}, { |
| 846 |
– |
"LBNL/Klems Half", 73, |
| 847 |
– |
{ {-6.5, 1}, |
| 848 |
– |
{6.5, 8}, |
| 849 |
– |
{19.5, 12}, |
| 850 |
– |
{32.5, 16}, |
| 851 |
– |
{46.5, 20}, |
| 852 |
– |
{61.5, 12}, |
| 853 |
– |
{76.5, 4}, |
| 854 |
– |
{90., 0} } |
| 855 |
– |
}, { |
| 856 |
– |
"LBNL/Klems Quarter", 41, |
| 857 |
– |
{ {-9., 1}, |
| 858 |
– |
{9., 8}, |
| 859 |
– |
{27., 12}, |
| 860 |
– |
{46., 12}, |
| 861 |
– |
{66., 8}, |
| 862 |
– |
{90., 0} } |
| 863 |
– |
} |
| 864 |
– |
}; |
| 865 |
– |
|
| 866 |
– |
static int nabases = 3; /* current number of defined bases */ |
| 867 |
– |
|
| 868 |
– |
#define FEQ(a,b) ((a)-(b) <= 1e-6 && (b)-(a) <= 1e-6) |
| 869 |
– |
|
| 870 |
– |
static int |
| 871 |
– |
fequal(double a, double b) |
| 872 |
– |
{ |
| 873 |
– |
if (b != 0) |
| 874 |
– |
a = a/b - 1.; |
| 875 |
– |
return((a <= 1e-6) & (a >= -1e-6)); |
| 876 |
– |
} |
| 877 |
– |
|
| 878 |
– |
/* Returns the name of the given tag */ |
| 879 |
– |
#ifdef ezxml_name |
| 880 |
– |
#undef ezxml_name |
| 881 |
– |
static char * |
| 882 |
– |
ezxml_name(ezxml_t xml) |
| 883 |
– |
{ |
| 884 |
– |
if (xml == NULL) |
| 885 |
– |
return(NULL); |
| 886 |
– |
return(xml->name); |
| 887 |
– |
} |
| 888 |
– |
#endif |
| 889 |
– |
|
| 890 |
– |
/* Returns the given tag's character content or empty string if none */ |
| 891 |
– |
#ifdef ezxml_txt |
| 892 |
– |
#undef ezxml_txt |
| 893 |
– |
static char * |
| 894 |
– |
ezxml_txt(ezxml_t xml) |
| 895 |
– |
{ |
| 896 |
– |
if (xml == NULL) |
| 897 |
– |
return(""); |
| 898 |
– |
return(xml->txt); |
| 899 |
– |
} |
| 900 |
– |
#endif |
| 901 |
– |
|
| 902 |
– |
|
| 903 |
– |
static int |
| 904 |
– |
ab_getvec( /* get vector for this angle basis index */ |
| 905 |
– |
FVECT v, |
| 906 |
– |
int ndx, |
| 907 |
– |
void *p |
| 908 |
– |
) |
| 909 |
– |
{ |
| 910 |
– |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
| 911 |
– |
int li; |
| 912 |
– |
double pol, azi, d; |
| 913 |
– |
|
| 914 |
– |
if ((ndx < 0) | (ndx >= ab->nangles)) |
| 915 |
– |
return(0); |
| 916 |
– |
for (li = 0; ndx >= ab->lat[li].nphis; li++) |
| 917 |
– |
ndx -= ab->lat[li].nphis; |
| 918 |
– |
pol = PI/180.*0.5*(ab->lat[li].tmin + ab->lat[li+1].tmin); |
| 919 |
– |
azi = 2.*PI*ndx/ab->lat[li].nphis; |
| 920 |
– |
v[2] = d = cos(pol); |
| 921 |
– |
d = sqrt(1. - d*d); /* sin(pol) */ |
| 922 |
– |
v[0] = cos(azi)*d; |
| 923 |
– |
v[1] = sin(azi)*d; |
| 924 |
– |
return(1); |
| 925 |
– |
} |
| 926 |
– |
|
| 927 |
– |
|
| 928 |
– |
static int |
| 929 |
– |
ab_getndx( /* get index corresponding to the given vector */ |
| 930 |
– |
FVECT v, |
| 931 |
– |
void *p |
| 932 |
– |
) |
| 933 |
– |
{ |
| 934 |
– |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
| 935 |
– |
int li, ndx; |
| 936 |
– |
double pol, azi, d; |
| 937 |
– |
|
| 938 |
– |
if ((v[2] < -1.0) | (v[2] > 1.0)) |
| 939 |
– |
return(-1); |
| 940 |
– |
pol = 180.0/PI*acos(v[2]); |
| 941 |
– |
azi = 180.0/PI*atan2(v[1], v[0]); |
| 942 |
– |
if (azi < 0.0) azi += 360.0; |
| 943 |
– |
for (li = 1; ab->lat[li].tmin <= pol; li++) |
| 944 |
– |
if (!ab->lat[li].nphis) |
| 945 |
– |
return(-1); |
| 946 |
– |
--li; |
| 947 |
– |
ndx = (int)((1./360.)*azi*ab->lat[li].nphis + 0.5); |
| 948 |
– |
if (ndx >= ab->lat[li].nphis) ndx = 0; |
| 949 |
– |
while (li--) |
| 950 |
– |
ndx += ab->lat[li].nphis; |
| 951 |
– |
return(ndx); |
| 952 |
– |
} |
| 953 |
– |
|
| 954 |
– |
|
| 955 |
– |
static double |
| 956 |
– |
ab_getohm( /* get solid angle for this angle basis index */ |
| 957 |
– |
int ndx, |
| 958 |
– |
void *p |
| 959 |
– |
) |
| 960 |
– |
{ |
| 961 |
– |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
| 962 |
– |
int li; |
| 963 |
– |
double theta, theta1; |
| 964 |
– |
|
| 965 |
– |
if ((ndx < 0) | (ndx >= ab->nangles)) |
| 966 |
– |
return(0); |
| 967 |
– |
for (li = 0; ndx >= ab->lat[li].nphis; li++) |
| 968 |
– |
ndx -= ab->lat[li].nphis; |
| 969 |
– |
theta1 = PI/180. * ab->lat[li+1].tmin; |
| 970 |
– |
if (ab->lat[li].nphis == 1) { /* special case */ |
| 971 |
– |
if (ab->lat[li].tmin > FTINY) |
| 972 |
– |
error(USER, "unsupported BSDF coordinate system"); |
| 973 |
– |
return(2.*PI*(1. - cos(theta1))); |
| 974 |
– |
} |
| 975 |
– |
theta = PI/180. * ab->lat[li].tmin; |
| 976 |
– |
return(2.*PI*(cos(theta) - cos(theta1))/(double)ab->lat[li].nphis); |
| 977 |
– |
} |
| 978 |
– |
|
| 979 |
– |
|
| 980 |
– |
static int |
| 981 |
– |
ab_getvecR( /* get reverse vector for this angle basis index */ |
| 982 |
– |
FVECT v, |
| 983 |
– |
int ndx, |
| 984 |
– |
void *p |
| 985 |
– |
) |
| 986 |
– |
{ |
| 987 |
– |
if (!ab_getvec(v, ndx, p)) |
| 988 |
– |
return(0); |
| 989 |
– |
|
| 990 |
– |
v[0] = -v[0]; |
| 991 |
– |
v[1] = -v[1]; |
| 992 |
– |
v[2] = -v[2]; |
| 993 |
– |
|
| 994 |
– |
return(1); |
| 995 |
– |
} |
| 996 |
– |
|
| 997 |
– |
|
| 998 |
– |
static int |
| 999 |
– |
ab_getndxR( /* get index corresponding to the reverse vector */ |
| 1000 |
– |
FVECT v, |
| 1001 |
– |
void *p |
| 1002 |
– |
) |
| 1003 |
– |
{ |
| 1004 |
– |
FVECT v2; |
| 1005 |
– |
|
| 1006 |
– |
v2[0] = -v[0]; |
| 1007 |
– |
v2[1] = -v[1]; |
| 1008 |
– |
v2[2] = -v[2]; |
| 1009 |
– |
|
| 1010 |
– |
return ab_getndx(v2, p); |
| 1011 |
– |
} |
| 1012 |
– |
|
| 1013 |
– |
|
| 1014 |
– |
static void |
| 1015 |
– |
load_angle_basis( /* load custom BSDF angle basis */ |
| 1016 |
– |
ezxml_t wab |
| 1017 |
– |
) |
| 1018 |
– |
{ |
| 1019 |
– |
char *abname = ezxml_txt(ezxml_child(wab, "AngleBasisName")); |
| 1020 |
– |
ezxml_t wbb; |
| 1021 |
– |
int i; |
| 1022 |
– |
|
| 1023 |
– |
if (!abname || !*abname) |
| 1024 |
– |
return; |
| 1025 |
– |
for (i = nabases; i--; ) |
| 1026 |
– |
if (!strcasecmp(abname, abase_list[i].name)) |
| 1027 |
– |
return; /* assume it's the same */ |
| 1028 |
– |
if (nabases >= MAXABASES) |
| 1029 |
– |
error(INTERNAL, "too many angle bases"); |
| 1030 |
– |
strcpy(abase_list[nabases].name, abname); |
| 1031 |
– |
abase_list[nabases].nangles = 0; |
| 1032 |
– |
for (i = 0, wbb = ezxml_child(wab, "AngleBasisBlock"); |
| 1033 |
– |
wbb != NULL; i++, wbb = wbb->next) { |
| 1034 |
– |
if (i >= MAXLATS) |
| 1035 |
– |
error(INTERNAL, "too many latitudes in custom basis"); |
| 1036 |
– |
abase_list[nabases].lat[i+1].tmin = atof(ezxml_txt( |
| 1037 |
– |
ezxml_child(ezxml_child(wbb, |
| 1038 |
– |
"ThetaBounds"), "UpperTheta"))); |
| 1039 |
– |
if (!i) |
| 1040 |
– |
abase_list[nabases].lat[i].tmin = |
| 1041 |
– |
-abase_list[nabases].lat[i+1].tmin; |
| 1042 |
– |
else if (!fequal(atof(ezxml_txt(ezxml_child(ezxml_child(wbb, |
| 1043 |
– |
"ThetaBounds"), "LowerTheta"))), |
| 1044 |
– |
abase_list[nabases].lat[i].tmin)) |
| 1045 |
– |
error(WARNING, "theta values disagree in custom basis"); |
| 1046 |
– |
abase_list[nabases].nangles += |
| 1047 |
– |
abase_list[nabases].lat[i].nphis = |
| 1048 |
– |
atoi(ezxml_txt(ezxml_child(wbb, "nPhis"))); |
| 1049 |
– |
} |
| 1050 |
– |
abase_list[nabases++].lat[i].nphis = 0; |
| 1051 |
– |
} |
| 1052 |
– |
|
| 1053 |
– |
|
| 1054 |
– |
static void |
| 1055 |
– |
load_geometry( /* load geometric dimensions and description (if any) */ |
| 1056 |
– |
struct BSDF_data *dp, |
| 1057 |
– |
ezxml_t wdb |
| 1058 |
– |
) |
| 1059 |
– |
{ |
| 1060 |
– |
ezxml_t geom; |
| 1061 |
– |
double cfact; |
| 1062 |
– |
const char *fmt, *mgfstr; |
| 1063 |
– |
|
| 1064 |
– |
dp->dim[0] = dp->dim[1] = dp->dim[2] = 0; |
| 1065 |
– |
dp->mgf = NULL; |
| 1066 |
– |
if ((geom = ezxml_child(wdb, "Width")) != NULL) |
| 1067 |
– |
dp->dim[0] = atof(ezxml_txt(geom)) * |
| 1068 |
– |
to_meters(ezxml_attr(geom, "unit")); |
| 1069 |
– |
if ((geom = ezxml_child(wdb, "Height")) != NULL) |
| 1070 |
– |
dp->dim[1] = atof(ezxml_txt(geom)) * |
| 1071 |
– |
to_meters(ezxml_attr(geom, "unit")); |
| 1072 |
– |
if ((geom = ezxml_child(wdb, "Thickness")) != NULL) |
| 1073 |
– |
dp->dim[2] = atof(ezxml_txt(geom)) * |
| 1074 |
– |
to_meters(ezxml_attr(geom, "unit")); |
| 1075 |
– |
if ((geom = ezxml_child(wdb, "Geometry")) == NULL || |
| 1076 |
– |
(mgfstr = ezxml_txt(geom)) == NULL) |
| 1077 |
– |
return; |
| 1078 |
– |
if ((fmt = ezxml_attr(geom, "format")) != NULL && |
| 1079 |
– |
strcasecmp(fmt, "MGF")) { |
| 1080 |
– |
sprintf(errmsg, "unrecognized geometry format '%s'", fmt); |
| 1081 |
– |
error(WARNING, errmsg); |
| 1082 |
– |
return; |
| 1083 |
– |
} |
| 1084 |
– |
cfact = to_meters(ezxml_attr(geom, "unit")); |
| 1085 |
– |
dp->mgf = (char *)malloc(strlen(mgfstr)+32); |
| 1086 |
– |
if (dp->mgf == NULL) |
| 1087 |
– |
error(SYSTEM, "out of memory in load_geometry"); |
| 1088 |
– |
if (cfact < 0.99 || cfact > 1.01) |
| 1089 |
– |
sprintf(dp->mgf, "xf -s %.5f\n%s\nxf\n", cfact, mgfstr); |
| 1090 |
– |
else |
| 1091 |
– |
strcpy(dp->mgf, mgfstr); |
| 1092 |
– |
} |
| 1093 |
– |
|
| 1094 |
– |
|
| 1095 |
– |
static void |
| 1096 |
– |
load_bsdf_data( /* load BSDF distribution for this wavelength */ |
| 1097 |
– |
struct BSDF_data *dp, |
| 1098 |
– |
ezxml_t wdb |
| 1099 |
– |
) |
| 1100 |
– |
{ |
| 1101 |
– |
char *cbasis = ezxml_txt(ezxml_child(wdb,"ColumnAngleBasis")); |
| 1102 |
– |
char *rbasis = ezxml_txt(ezxml_child(wdb,"RowAngleBasis")); |
| 1103 |
– |
char *sdata; |
| 1104 |
– |
int i; |
| 1105 |
– |
|
| 1106 |
– |
if ((!cbasis || !*cbasis) | (!rbasis || !*rbasis)) { |
| 1107 |
– |
error(WARNING, "missing column/row basis for BSDF"); |
| 1108 |
– |
return; |
| 1109 |
– |
} |
| 1110 |
– |
for (i = nabases; i--; ) |
| 1111 |
– |
if (!strcasecmp(cbasis, abase_list[i].name)) { |
| 1112 |
– |
dp->ninc = abase_list[i].nangles; |
| 1113 |
– |
dp->ib_priv = (void *)&abase_list[i]; |
| 1114 |
– |
dp->ib_vec = ab_getvecR; |
| 1115 |
– |
dp->ib_ndx = ab_getndxR; |
| 1116 |
– |
dp->ib_ohm = ab_getohm; |
| 1117 |
– |
break; |
| 1118 |
– |
} |
| 1119 |
– |
if (i < 0) { |
| 1120 |
– |
sprintf(errmsg, "undefined ColumnAngleBasis '%s'", cbasis); |
| 1121 |
– |
error(WARNING, errmsg); |
| 1122 |
– |
return; |
| 1123 |
– |
} |
| 1124 |
– |
for (i = nabases; i--; ) |
| 1125 |
– |
if (!strcasecmp(rbasis, abase_list[i].name)) { |
| 1126 |
– |
dp->nout = abase_list[i].nangles; |
| 1127 |
– |
dp->ob_priv = (void *)&abase_list[i]; |
| 1128 |
– |
dp->ob_vec = ab_getvec; |
| 1129 |
– |
dp->ob_ndx = ab_getndx; |
| 1130 |
– |
dp->ob_ohm = ab_getohm; |
| 1131 |
– |
break; |
| 1132 |
– |
} |
| 1133 |
– |
if (i < 0) { |
| 1134 |
– |
sprintf(errmsg, "undefined RowAngleBasis '%s'", rbasis); |
| 1135 |
– |
error(WARNING, errmsg); |
| 1136 |
– |
return; |
| 1137 |
– |
} |
| 1138 |
– |
/* read BSDF data */ |
| 1139 |
– |
sdata = ezxml_txt(ezxml_child(wdb,"ScatteringData")); |
| 1140 |
– |
if (!sdata || !*sdata) { |
| 1141 |
– |
error(WARNING, "missing BSDF ScatteringData"); |
| 1142 |
– |
return; |
| 1143 |
– |
} |
| 1144 |
– |
dp->bsdf = (float *)malloc(sizeof(float)*dp->ninc*dp->nout); |
| 1145 |
– |
if (dp->bsdf == NULL) |
| 1146 |
– |
error(SYSTEM, "out of memory in load_bsdf_data"); |
| 1147 |
– |
for (i = 0; i < dp->ninc*dp->nout; i++) { |
| 1148 |
– |
char *sdnext = fskip(sdata); |
| 1149 |
– |
if (sdnext == NULL) { |
| 1150 |
– |
error(WARNING, "bad/missing BSDF ScatteringData"); |
| 1151 |
– |
free(dp->bsdf); dp->bsdf = NULL; |
| 1152 |
– |
return; |
| 1153 |
– |
} |
| 1154 |
– |
while (*sdnext && isspace(*sdnext)) |
| 1155 |
– |
sdnext++; |
| 1156 |
– |
if (*sdnext == ',') sdnext++; |
| 1157 |
– |
dp->bsdf[i] = atof(sdata); |
| 1158 |
– |
sdata = sdnext; |
| 1159 |
– |
} |
| 1160 |
– |
while (isspace(*sdata)) |
| 1161 |
– |
sdata++; |
| 1162 |
– |
if (*sdata) { |
| 1163 |
– |
sprintf(errmsg, "%d extra characters after BSDF ScatteringData", |
| 1164 |
– |
(int)strlen(sdata)); |
| 1165 |
– |
error(WARNING, errmsg); |
| 1166 |
– |
} |
| 1167 |
– |
} |
| 1168 |
– |
|
| 1169 |
– |
|
| 1170 |
– |
static int |
| 1171 |
– |
check_bsdf_data( /* check that BSDF data is sane */ |
| 1172 |
– |
struct BSDF_data *dp |
| 1173 |
– |
) |
| 1174 |
– |
{ |
| 1175 |
– |
double *omega_iarr, *omega_oarr; |
| 1176 |
– |
double dom, contrib, hemi_total, full_total; |
| 1177 |
– |
int nneg; |
| 1178 |
– |
FVECT v; |
| 1179 |
– |
int i, o; |
| 1180 |
– |
|
| 1181 |
– |
if (dp == NULL || dp->bsdf == NULL) |
| 1182 |
– |
return(0); |
| 1183 |
– |
omega_iarr = (double *)calloc(dp->ninc, sizeof(double)); |
| 1184 |
– |
omega_oarr = (double *)calloc(dp->nout, sizeof(double)); |
| 1185 |
– |
if ((omega_iarr == NULL) | (omega_oarr == NULL)) |
| 1186 |
– |
error(SYSTEM, "out of memory in check_bsdf_data"); |
| 1187 |
– |
/* incoming projected solid angles */ |
| 1188 |
– |
hemi_total = .0; |
| 1189 |
– |
for (i = dp->ninc; i--; ) { |
| 1190 |
– |
dom = getBSDF_incohm(dp,i); |
| 1191 |
– |
if (dom <= 0) { |
| 1192 |
– |
error(WARNING, "zero/negative incoming solid angle"); |
| 1193 |
– |
continue; |
| 1194 |
– |
} |
| 1195 |
– |
if (!getBSDF_incvec(v,dp,i) || v[2] > FTINY) { |
| 1196 |
– |
error(WARNING, "illegal incoming BSDF direction"); |
| 1197 |
– |
free(omega_iarr); free(omega_oarr); |
| 1198 |
– |
return(0); |
| 1199 |
– |
} |
| 1200 |
– |
hemi_total += omega_iarr[i] = dom * -v[2]; |
| 1201 |
– |
} |
| 1202 |
– |
if ((hemi_total > 1.02*PI) | (hemi_total < 0.98*PI)) { |
| 1203 |
– |
sprintf(errmsg, "incoming BSDF hemisphere off by %.1f%%", |
| 1204 |
– |
100.*(hemi_total/PI - 1.)); |
| 1205 |
– |
error(WARNING, errmsg); |
| 1206 |
– |
} |
| 1207 |
– |
dom = PI / hemi_total; /* fix normalization */ |
| 1208 |
– |
for (i = dp->ninc; i--; ) |
| 1209 |
– |
omega_iarr[i] *= dom; |
| 1210 |
– |
/* outgoing projected solid angles */ |
| 1211 |
– |
hemi_total = .0; |
| 1212 |
– |
for (o = dp->nout; o--; ) { |
| 1213 |
– |
dom = getBSDF_outohm(dp,o); |
| 1214 |
– |
if (dom <= 0) { |
| 1215 |
– |
error(WARNING, "zero/negative outgoing solid angle"); |
| 1216 |
– |
continue; |
| 1217 |
– |
} |
| 1218 |
– |
if (!getBSDF_outvec(v,dp,o) || v[2] < -FTINY) { |
| 1219 |
– |
error(WARNING, "illegal outgoing BSDF direction"); |
| 1220 |
– |
free(omega_iarr); free(omega_oarr); |
| 1221 |
– |
return(0); |
| 1222 |
– |
} |
| 1223 |
– |
hemi_total += omega_oarr[o] = dom * v[2]; |
| 1224 |
– |
} |
| 1225 |
– |
if ((hemi_total > 1.02*PI) | (hemi_total < 0.98*PI)) { |
| 1226 |
– |
sprintf(errmsg, "outgoing BSDF hemisphere off by %.1f%%", |
| 1227 |
– |
100.*(hemi_total/PI - 1.)); |
| 1228 |
– |
error(WARNING, errmsg); |
| 1229 |
– |
} |
| 1230 |
– |
dom = PI / hemi_total; /* fix normalization */ |
| 1231 |
– |
for (o = dp->nout; o--; ) |
| 1232 |
– |
omega_oarr[o] *= dom; |
| 1233 |
– |
nneg = 0; /* check outgoing totals */ |
| 1234 |
– |
for (i = 0; i < dp->ninc; i++) { |
| 1235 |
– |
hemi_total = .0; |
| 1236 |
– |
for (o = dp->nout; o--; ) { |
| 1237 |
– |
double f = BSDF_value(dp,i,o); |
| 1238 |
– |
if (f >= 0) |
| 1239 |
– |
hemi_total += f*omega_oarr[o]; |
| 1240 |
– |
else { |
| 1241 |
– |
nneg += (f < -FTINY); |
| 1242 |
– |
BSDF_value(dp,i,o) = .0f; |
| 1243 |
– |
} |
| 1244 |
– |
} |
| 1245 |
– |
if (hemi_total > 1.01) { |
| 1246 |
– |
sprintf(errmsg, |
| 1247 |
– |
"incoming BSDF direction %d passes %.1f%% of light", |
| 1248 |
– |
i, 100.*hemi_total); |
| 1249 |
– |
error(WARNING, errmsg); |
| 1250 |
– |
} |
| 1251 |
– |
} |
| 1252 |
– |
if (nneg) { |
| 1253 |
– |
sprintf(errmsg, "%d negative BSDF values (ignored)", nneg); |
| 1254 |
– |
error(WARNING, errmsg); |
| 1255 |
– |
} |
| 1256 |
– |
full_total = .0; /* reverse roles and check again */ |
| 1257 |
– |
for (o = 0; o < dp->nout; o++) { |
| 1258 |
– |
hemi_total = .0; |
| 1259 |
– |
for (i = dp->ninc; i--; ) |
| 1260 |
– |
hemi_total += BSDF_value(dp,i,o) * omega_iarr[i]; |
| 1261 |
– |
|
| 1262 |
– |
if (hemi_total > 1.01) { |
| 1263 |
– |
sprintf(errmsg, |
| 1264 |
– |
"outgoing BSDF direction %d collects %.1f%% of light", |
| 1265 |
– |
o, 100.*hemi_total); |
| 1266 |
– |
error(WARNING, errmsg); |
| 1267 |
– |
} |
| 1268 |
– |
full_total += hemi_total*omega_oarr[o]; |
| 1269 |
– |
} |
| 1270 |
– |
full_total /= PI; |
| 1271 |
– |
if (full_total > 1.00001) { |
| 1272 |
– |
sprintf(errmsg, "BSDF transfers %.4f%% of light", |
| 1273 |
– |
100.*full_total); |
| 1274 |
– |
error(WARNING, errmsg); |
| 1275 |
– |
} |
| 1276 |
– |
free(omega_iarr); free(omega_oarr); |
| 1277 |
– |
return(1); |
| 1278 |
– |
} |
| 1279 |
– |
|
| 1280 |
– |
|
| 1281 |
– |
struct BSDF_data * |
| 1282 |
– |
load_BSDF( /* load BSDF data from file */ |
| 1283 |
– |
char *fname |
| 1284 |
– |
) |
| 1285 |
– |
{ |
| 1286 |
– |
char *path; |
| 1287 |
– |
ezxml_t fl, wtl, wld, wdb; |
| 1288 |
– |
struct BSDF_data *dp; |
| 1289 |
– |
|
| 1290 |
– |
path = getpath(fname, getrlibpath(), R_OK); |
| 1291 |
– |
if (path == NULL) { |
| 1292 |
– |
sprintf(errmsg, "cannot find BSDF file \"%s\"", fname); |
| 1293 |
– |
error(WARNING, errmsg); |
| 1294 |
– |
return(NULL); |
| 1295 |
– |
} |
| 1296 |
– |
fl = ezxml_parse_file(path); |
| 1297 |
– |
if (fl == NULL) { |
| 1298 |
– |
sprintf(errmsg, "cannot open BSDF \"%s\"", path); |
| 1299 |
– |
error(WARNING, errmsg); |
| 1300 |
– |
return(NULL); |
| 1301 |
– |
} |
| 1302 |
– |
if (ezxml_error(fl)[0]) { |
| 1303 |
– |
sprintf(errmsg, "BSDF \"%s\" %s", path, ezxml_error(fl)); |
| 1304 |
– |
error(WARNING, errmsg); |
| 1305 |
– |
ezxml_free(fl); |
| 1306 |
– |
return(NULL); |
| 1307 |
– |
} |
| 1308 |
– |
if (strcmp(ezxml_name(fl), "WindowElement")) { |
| 1309 |
– |
sprintf(errmsg, |
| 1310 |
– |
"BSDF \"%s\": top level node not 'WindowElement'", |
| 1311 |
– |
path); |
| 1312 |
– |
error(WARNING, errmsg); |
| 1313 |
– |
ezxml_free(fl); |
| 1314 |
– |
return(NULL); |
| 1315 |
– |
} |
| 1316 |
– |
wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer"); |
| 1317 |
– |
if (strcasecmp(ezxml_txt(ezxml_child(ezxml_child(wtl, |
| 1318 |
– |
"DataDefinition"), "IncidentDataStructure")), |
| 1319 |
– |
"Columns")) { |
| 1320 |
– |
sprintf(errmsg, |
| 1321 |
– |
"BSDF \"%s\": unsupported IncidentDataStructure", |
| 1322 |
– |
path); |
| 1323 |
– |
error(WARNING, errmsg); |
| 1324 |
– |
ezxml_free(fl); |
| 1325 |
– |
return(NULL); |
| 1326 |
– |
} |
| 1327 |
– |
load_angle_basis(ezxml_child(ezxml_child(wtl, |
| 1328 |
– |
"DataDefinition"), "AngleBasis")); |
| 1329 |
– |
dp = (struct BSDF_data *)calloc(1, sizeof(struct BSDF_data)); |
| 1330 |
– |
load_geometry(dp, ezxml_child(wtl, "Material")); |
| 1331 |
– |
for (wld = ezxml_child(wtl, "WavelengthData"); |
| 1332 |
– |
wld != NULL; wld = wld->next) { |
| 1333 |
– |
if (strcasecmp(ezxml_txt(ezxml_child(wld,"Wavelength")), |
| 1334 |
– |
"Visible")) |
| 1335 |
– |
continue; |
| 1336 |
– |
for (wdb = ezxml_child(wld, "WavelengthDataBlock"); |
| 1337 |
– |
wdb != NULL; wdb = wdb->next) |
| 1338 |
– |
if (!strcasecmp(ezxml_txt(ezxml_child(wdb, |
| 1339 |
– |
"WavelengthDataDirection")), |
| 1340 |
– |
"Transmission Front")) |
| 1341 |
– |
break; |
| 1342 |
– |
if (wdb != NULL) { /* load front BTDF */ |
| 1343 |
– |
load_bsdf_data(dp, wdb); |
| 1344 |
– |
break; /* ignore the rest */ |
| 1345 |
– |
} |
| 1346 |
– |
} |
| 1347 |
– |
ezxml_free(fl); /* done with XML file */ |
| 1348 |
– |
if (!check_bsdf_data(dp)) { |
| 1349 |
– |
sprintf(errmsg, "bad/missing BTDF data in \"%s\"", path); |
| 1350 |
– |
error(WARNING, errmsg); |
| 1351 |
– |
free_BSDF(dp); |
| 1352 |
– |
dp = NULL; |
| 1353 |
– |
} |
| 1354 |
– |
return(dp); |
| 1355 |
– |
} |
| 1356 |
– |
|
| 1357 |
– |
|
| 1358 |
– |
void |
| 1359 |
– |
free_BSDF( /* free BSDF data structure */ |
| 1360 |
– |
struct BSDF_data *b |
| 1361 |
– |
) |
| 1362 |
– |
{ |
| 1363 |
– |
if (b == NULL) |
| 1364 |
– |
return; |
| 1365 |
– |
if (b->mgf != NULL) |
| 1366 |
– |
free(b->mgf); |
| 1367 |
– |
if (b->bsdf != NULL) |
| 1368 |
– |
free(b->bsdf); |
| 1369 |
– |
free(b); |
| 1370 |
– |
} |
| 1371 |
– |
|
| 1372 |
– |
|
| 1373 |
– |
int |
| 1374 |
– |
r_BSDF_incvec( /* compute random input vector at given location */ |
| 1375 |
– |
FVECT v, |
| 1376 |
– |
struct BSDF_data *b, |
| 1377 |
– |
int i, |
| 1378 |
– |
double rv, |
| 1379 |
– |
MAT4 xm |
| 1380 |
– |
) |
| 1381 |
– |
{ |
| 1382 |
– |
FVECT pert; |
| 1383 |
– |
double rad; |
| 1384 |
– |
int j; |
| 1385 |
– |
|
| 1386 |
– |
if (!getBSDF_incvec(v, b, i)) |
| 1387 |
– |
return(0); |
| 1388 |
– |
rad = sqrt(getBSDF_incohm(b, i) / PI); |
| 1389 |
– |
multisamp(pert, 3, rv); |
| 1390 |
– |
for (j = 0; j < 3; j++) |
| 1391 |
– |
v[j] += rad*(2.*pert[j] - 1.); |
| 1392 |
– |
if (xm != NULL) |
| 1393 |
– |
multv3(v, v, xm); |
| 1394 |
– |
return(normalize(v) != 0.0); |
| 1395 |
– |
} |
| 1396 |
– |
|
| 1397 |
– |
|
| 1398 |
– |
int |
| 1399 |
– |
r_BSDF_outvec( /* compute random output vector at given location */ |
| 1400 |
– |
FVECT v, |
| 1401 |
– |
struct BSDF_data *b, |
| 1402 |
– |
int o, |
| 1403 |
– |
double rv, |
| 1404 |
– |
MAT4 xm |
| 1405 |
– |
) |
| 1406 |
– |
{ |
| 1407 |
– |
FVECT pert; |
| 1408 |
– |
double rad; |
| 1409 |
– |
int j; |
| 1410 |
– |
|
| 1411 |
– |
if (!getBSDF_outvec(v, b, o)) |
| 1412 |
– |
return(0); |
| 1413 |
– |
rad = sqrt(getBSDF_outohm(b, o) / PI); |
| 1414 |
– |
multisamp(pert, 3, rv); |
| 1415 |
– |
for (j = 0; j < 3; j++) |
| 1416 |
– |
v[j] += rad*(2.*pert[j] - 1.); |
| 1417 |
– |
if (xm != NULL) |
| 1418 |
– |
multv3(v, v, xm); |
| 1419 |
– |
return(normalize(v) != 0.0); |
| 1420 |
– |
} |
| 1421 |
– |
|
| 1422 |
– |
|
| 1423 |
– |
static int |
| 1424 |
– |
addrot( /* compute rotation (x,y,z) => (xp,yp,zp) */ |
| 1425 |
– |
char *xfarg[], |
| 1426 |
– |
FVECT xp, |
| 1427 |
– |
FVECT yp, |
| 1428 |
– |
FVECT zp |
| 1429 |
– |
) |
| 1430 |
– |
{ |
| 1431 |
– |
static char bufs[3][16]; |
| 1432 |
– |
int bn = 0; |
| 1433 |
– |
char **xfp = xfarg; |
| 1434 |
– |
double theta; |
| 1435 |
– |
|
| 1436 |
– |
if (yp[2]*yp[2] + zp[2]*zp[2] < 2.*FTINY*FTINY) { |
| 1437 |
– |
/* Special case for X' along Z-axis */ |
| 1438 |
– |
theta = -atan2(yp[0], yp[1]); |
| 1439 |
– |
*xfp++ = "-ry"; |
| 1440 |
– |
*xfp++ = xp[2] < 0.0 ? "90" : "-90"; |
| 1441 |
– |
*xfp++ = "-rz"; |
| 1442 |
– |
sprintf(bufs[bn], "%f", theta*(180./PI)); |
| 1443 |
– |
*xfp++ = bufs[bn++]; |
| 1444 |
– |
return(xfp - xfarg); |
| 1445 |
– |
} |
| 1446 |
– |
theta = atan2(yp[2], zp[2]); |
| 1447 |
– |
if (!FEQ(theta,0.0)) { |
| 1448 |
– |
*xfp++ = "-rx"; |
| 1449 |
– |
sprintf(bufs[bn], "%f", theta*(180./PI)); |
| 1450 |
– |
*xfp++ = bufs[bn++]; |
| 1451 |
– |
} |
| 1452 |
– |
theta = asin(-xp[2]); |
| 1453 |
– |
if (!FEQ(theta,0.0)) { |
| 1454 |
– |
*xfp++ = "-ry"; |
| 1455 |
– |
sprintf(bufs[bn], " %f", theta*(180./PI)); |
| 1456 |
– |
*xfp++ = bufs[bn++]; |
| 1457 |
– |
} |
| 1458 |
– |
theta = atan2(xp[1], xp[0]); |
| 1459 |
– |
if (!FEQ(theta,0.0)) { |
| 1460 |
– |
*xfp++ = "-rz"; |
| 1461 |
– |
sprintf(bufs[bn], "%f", theta*(180./PI)); |
| 1462 |
– |
*xfp++ = bufs[bn++]; |
| 1463 |
– |
} |
| 1464 |
– |
*xfp = NULL; |
| 1465 |
– |
return(xfp - xfarg); |
| 1466 |
– |
} |
| 1467 |
– |
|
| 1468 |
– |
|
| 1469 |
– |
int |
| 1470 |
– |
getBSDF_xfm( /* compute BSDF orient. -> world orient. transform */ |
| 1471 |
– |
MAT4 xm, |
| 1472 |
– |
FVECT nrm, |
| 1473 |
– |
UpDir ud, |
| 1474 |
– |
char *xfbuf |
| 1475 |
– |
) |
| 1476 |
– |
{ |
| 1477 |
– |
char *xfargs[7]; |
| 1478 |
– |
XF myxf; |
| 1479 |
– |
FVECT updir, xdest, ydest; |
| 1480 |
– |
int i; |
| 1481 |
– |
|
| 1482 |
– |
updir[0] = updir[1] = updir[2] = 0.; |
| 1483 |
– |
switch (ud) { |
| 1484 |
– |
case UDzneg: |
| 1485 |
– |
updir[2] = -1.; |
| 1486 |
– |
break; |
| 1487 |
– |
case UDyneg: |
| 1488 |
– |
updir[1] = -1.; |
| 1489 |
– |
break; |
| 1490 |
– |
case UDxneg: |
| 1491 |
– |
updir[0] = -1.; |
| 1492 |
– |
break; |
| 1493 |
– |
case UDxpos: |
| 1494 |
– |
updir[0] = 1.; |
| 1495 |
– |
break; |
| 1496 |
– |
case UDypos: |
| 1497 |
– |
updir[1] = 1.; |
| 1498 |
– |
break; |
| 1499 |
– |
case UDzpos: |
| 1500 |
– |
updir[2] = 1.; |
| 1501 |
– |
break; |
| 1502 |
– |
case UDunknown: |
| 1503 |
– |
return(0); |
| 1504 |
– |
} |
| 1505 |
– |
fcross(xdest, updir, nrm); |
| 1506 |
– |
if (normalize(xdest) == 0.0) |
| 1507 |
– |
return(0); |
| 1508 |
– |
fcross(ydest, nrm, xdest); |
| 1509 |
– |
xf(&myxf, addrot(xfargs, xdest, ydest, nrm), xfargs); |
| 1510 |
– |
copymat4(xm, myxf.xfm); |
| 1511 |
– |
if (xfbuf == NULL) |
| 1512 |
– |
return(1); |
| 1513 |
– |
/* return xf arguments as well */ |
| 1514 |
– |
for (i = 0; xfargs[i] != NULL; i++) { |
| 1515 |
– |
*xfbuf++ = ' '; |
| 1516 |
– |
strcpy(xfbuf, xfargs[i]); |
| 1517 |
– |
while (*xfbuf) ++xfbuf; |
| 1518 |
– |
} |
| 1519 |
– |
return(1); |
| 1520 |
– |
} |
| 1521 |
– |
|
| 1522 |
– |
/*######### END DEPRECATED ROUTINES #######*/ |
| 1523 |
– |
/*################################################################*/ |
