26 |
|
|
27 |
|
/* reference width maximum (1.0) */ |
28 |
|
static const unsigned iwbits = sizeof(unsigned)*4; |
29 |
< |
static const unsigned iwmax = (1<<(sizeof(unsigned)*4))-1; |
29 |
> |
static const unsigned iwmax = 1<<(sizeof(unsigned)*4); |
30 |
|
/* maximum cumulative value */ |
31 |
|
static const unsigned cumlmax = ~0; |
32 |
|
/* constant z-vector */ |
36 |
|
|
37 |
|
/* Struct used for our distribution-building callback */ |
38 |
|
typedef struct { |
39 |
< |
int nic; /* number of input coordinates */ |
39 |
> |
short nic; /* number of input coordinates */ |
40 |
> |
short rev; /* reversing query */ |
41 |
|
unsigned alen; /* current array length */ |
42 |
|
unsigned nall; /* number of allocated entries */ |
43 |
|
unsigned wmin; /* minimum square size so far */ |
433 |
|
static float |
434 |
|
SDqueryTre(const SDTre *sdt, const FVECT outVec, const FVECT inVec, double *hc) |
435 |
|
{ |
436 |
< |
FVECT rOutVec; |
437 |
< |
double gridPos[4]; |
436 |
> |
const RREAL *vtmp; |
437 |
> |
FVECT rOutVec; |
438 |
> |
double gridPos[4]; |
439 |
|
|
440 |
|
switch (sdt->sidef) { /* whose side are you on? */ |
441 |
< |
case SD_UFRONT: |
441 |
> |
case SD_FREFL: |
442 |
|
if ((outVec[2] < 0) | (inVec[2] < 0)) |
443 |
|
return -1.; |
444 |
|
break; |
445 |
< |
case SD_UBACK: |
445 |
> |
case SD_BREFL: |
446 |
|
if ((outVec[2] > 0) | (inVec[2] > 0)) |
447 |
|
return -1.; |
448 |
|
break; |
449 |
< |
case SD_XMIT: |
450 |
< |
if ((outVec[2] > 0) == (inVec[2] > 0)) |
449 |
> |
case SD_FXMIT: |
450 |
> |
if (outVec[2] > 0) { |
451 |
> |
if (inVec[2] > 0) |
452 |
> |
return -1.; |
453 |
> |
vtmp = outVec; outVec = inVec; inVec = vtmp; |
454 |
> |
} else if (inVec[2] < 0) |
455 |
|
return -1.; |
456 |
|
break; |
457 |
+ |
case SD_BXMIT: |
458 |
+ |
if (inVec[2] > 0) { |
459 |
+ |
if (outVec[2] > 0) |
460 |
+ |
return -1.; |
461 |
+ |
vtmp = outVec; outVec = inVec; inVec = vtmp; |
462 |
+ |
} else if (outVec[2] < 0) |
463 |
+ |
return -1.; |
464 |
+ |
break; |
465 |
|
default: |
466 |
|
return -1.; |
467 |
|
} |
501 |
|
int wid = csiz*(double)iwmax + .5; |
502 |
|
bitmask_t bmin[2], bmax[2]; |
503 |
|
|
504 |
< |
cmin += sp->nic; /* skip to output coords */ |
504 |
> |
cmin += sp->nic * !sp->rev; /* skip to output coords */ |
505 |
|
if (wid < sp->wmin) /* new minimum width? */ |
506 |
|
sp->wmin = wid; |
507 |
|
if (wid > sp->wmax) /* new maximum? */ |
547 |
|
|
548 |
|
/* Create a new cumulative distribution for the given input direction */ |
549 |
|
static SDTreCDst * |
550 |
< |
make_cdist(const SDTre *sdt, const double *pos) |
550 |
> |
make_cdist(const SDTre *sdt, const double *invec, int rev) |
551 |
|
{ |
552 |
|
SDdistScaffold myScaffold; |
553 |
+ |
double pos[4]; |
554 |
+ |
int cmask; |
555 |
|
SDTreCDst *cd; |
556 |
|
struct outdir_s *sp; |
557 |
|
double scale, cursum; |
560 |
|
myScaffold.wmin = iwmax; |
561 |
|
myScaffold.wmax = 0; |
562 |
|
myScaffold.nic = sdt->st->ndim - 2; |
563 |
+ |
myScaffold.rev = rev; |
564 |
|
myScaffold.alen = 0; |
565 |
|
myScaffold.nall = 512; |
566 |
|
myScaffold.darr = (struct outdir_s *)malloc(sizeof(struct outdir_s) * |
567 |
|
myScaffold.nall); |
568 |
|
if (myScaffold.darr == NULL) |
569 |
|
return NULL; |
570 |
+ |
/* set up traversal */ |
571 |
+ |
cmask = (1<<myScaffold.nic) - 1; |
572 |
+ |
for (i = myScaffold.nic; i--; ) |
573 |
+ |
pos[i+2*rev] = invec[i]; |
574 |
+ |
cmask <<= 2*rev; |
575 |
|
/* grow the distribution */ |
576 |
< |
if (SDtraverseTre(sdt->st, pos, (1<<myScaffold.nic)-1, |
576 |
> |
if (SDtraverseTre(sdt->st, pos, cmask, |
577 |
|
&build_scaffold, &myScaffold) < 0) { |
578 |
|
free(myScaffold.darr); |
579 |
|
return NULL; |
605 |
|
} |
606 |
|
cd->max_psa = myScaffold.wmax / (double)iwmax; |
607 |
|
cd->max_psa *= cd->max_psa * M_PI; |
608 |
< |
cd->sidef = sdt->sidef; |
608 |
> |
if (rev) |
609 |
> |
cd->sidef = (sdt->sidef==SD_BXMIT) ? SD_FXMIT : SD_BXMIT; |
610 |
> |
else |
611 |
> |
cd->sidef = sdt->sidef; |
612 |
|
cd->cTotal = 1e-20; /* compute directional total */ |
613 |
|
sp = myScaffold.darr; |
614 |
|
for (i = myScaffold.alen; i--; sp++) |
636 |
|
const SDTre *sdt; |
637 |
|
double inCoord[2]; |
638 |
|
int i; |
639 |
+ |
int mode; |
640 |
|
SDTreCDst *cd, *cdlast; |
641 |
|
/* check arguments */ |
642 |
|
if ((inVec == NULL) | (sdc == NULL) || |
643 |
|
(sdt = (SDTre *)sdc->dist) == NULL) |
644 |
|
return NULL; |
645 |
+ |
switch (mode = sdt->sidef) { /* check direction */ |
646 |
+ |
case SD_FREFL: |
647 |
+ |
if (inVec[2] < 0) |
648 |
+ |
return NULL; |
649 |
+ |
break; |
650 |
+ |
case SD_BREFL: |
651 |
+ |
if (inVec[2] > 0) |
652 |
+ |
return NULL; |
653 |
+ |
break; |
654 |
+ |
case SD_FXMIT: |
655 |
+ |
if (inVec[2] < 0) |
656 |
+ |
mode = SD_BXMIT; |
657 |
+ |
break; |
658 |
+ |
case SD_BXMIT: |
659 |
+ |
if (inVec[2] > 0) |
660 |
+ |
mode = SD_FXMIT; |
661 |
+ |
break; |
662 |
+ |
default: |
663 |
+ |
return NULL; |
664 |
+ |
} |
665 |
|
if (sdt->st->ndim == 3) { /* isotropic BSDF? */ |
666 |
+ |
if (mode != sdt->sidef) /* XXX unhandled reciprocity */ |
667 |
+ |
return &SDemptyCD; |
668 |
|
inCoord[0] = .5 - .5*sqrt(inVec[0]*inVec[0] + inVec[1]*inVec[1]); |
669 |
|
} else if (sdt->st->ndim == 4) { |
670 |
|
SDdisk2square(inCoord, -inVec[0], -inVec[1]); |
676 |
|
cdlast = NULL; /* check for direction in cache list */ |
677 |
|
for (cd = (SDTreCDst *)sdc->cdList; cd != NULL; |
678 |
|
cdlast = cd, cd = cd->next) { |
679 |
+ |
if (cd->sidef != mode) |
680 |
+ |
continue; |
681 |
|
for (i = sdt->st->ndim - 2; i--; ) |
682 |
|
if ((cd->clim[i][0] > inCoord[i]) | |
683 |
|
(inCoord[i] >= cd->clim[i][1])) |
686 |
|
break; /* means we have a match */ |
687 |
|
} |
688 |
|
if (cd == NULL) /* need to create new entry? */ |
689 |
< |
cdlast = cd = make_cdist(sdt, inCoord); |
689 |
> |
cdlast = cd = make_cdist(sdt, inCoord, mode != sdt->sidef); |
690 |
|
if (cdlast != NULL) { /* move entry to head of cache list */ |
691 |
|
cdlast->next = cd->next; |
692 |
|
cd->next = (SDTreCDst *)sdc->cdList; |
757 |
|
/* check arguments */ |
758 |
|
if ((ioVec == NULL) | (cd == NULL)) |
759 |
|
return SDEargument; |
760 |
+ |
if (!cd->sidef) |
761 |
+ |
return SDEnone; /* XXX should never happen */ |
762 |
|
if (ioVec[2] > 0) { |
763 |
< |
if (!(cd->sidef & SD_UFRONT)) |
763 |
> |
if ((cd->sidef != SD_FREFL) & (cd->sidef != SD_FXMIT)) |
764 |
|
return SDEargument; |
765 |
< |
} else if (!(cd->sidef & SD_UBACK)) |
765 |
> |
} else if ((cd->sidef != SD_BREFL) & (cd->sidef != SD_BXMIT)) |
766 |
|
return SDEargument; |
767 |
|
/* binary search to find position */ |
768 |
|
ilower = 0; iupper = cd->calen; |
788 |
|
if (gpos[2] > 0) /* paranoia, I hope */ |
789 |
|
gpos[2] = sqrt(gpos[2]); |
790 |
|
/* emit from back? */ |
791 |
< |
if (ioVec[2] > 0 ^ cd->sidef != SD_XMIT) |
791 |
> |
if ((cd->sidef == SD_BREFL) | (cd->sidef == SD_FXMIT)) |
792 |
|
gpos[2] = -gpos[2]; |
793 |
|
if (cd->isodist) { /* rotate isotropic result */ |
794 |
|
rotangle = atan2(-ioVec[1],-ioVec[0]); |
946 |
|
/* |
947 |
|
* Remember that front and back are reversed from WINDOW 6 orientations |
948 |
|
*/ |
949 |
< |
if (!strcasecmp(sdata, "Transmission")) { |
949 |
> |
if (!strcasecmp(sdata, "Transmission Front")) { |
950 |
|
if (sd->tf != NULL) |
951 |
|
SDfreeSpectralDF(sd->tf); |
952 |
|
if ((sd->tf = SDnewSpectralDF(1)) == NULL) |
953 |
|
return SDEmemory; |
954 |
|
df = sd->tf; |
955 |
+ |
} else if (!strcasecmp(sdata, "Transmission Back")) { |
956 |
+ |
if (sd->tb != NULL) |
957 |
+ |
SDfreeSpectralDF(sd->tb); |
958 |
+ |
if ((sd->tb = SDnewSpectralDF(1)) == NULL) |
959 |
+ |
return SDEmemory; |
960 |
+ |
df = sd->tb; |
961 |
|
} else if (!strcasecmp(sdata, "Reflection Front")) { |
962 |
|
if (sd->rb != NULL) /* note back-front reversal */ |
963 |
|
SDfreeSpectralDF(sd->rb); |
985 |
|
if (sdt == NULL) |
986 |
|
return SDEmemory; |
987 |
|
if (df == sd->rf) |
988 |
< |
sdt->sidef = SD_UFRONT; |
988 |
> |
sdt->sidef = SD_FREFL; |
989 |
|
else if (df == sd->rb) |
990 |
< |
sdt->sidef = SD_UBACK; |
991 |
< |
else |
992 |
< |
sdt->sidef = SD_XMIT; |
990 |
> |
sdt->sidef = SD_BREFL; |
991 |
> |
else if (df == sd->tf) |
992 |
> |
sdt->sidef = SD_FXMIT; |
993 |
> |
else /* df == sd->tb */ |
994 |
> |
sdt->sidef = SD_BXMIT; |
995 |
|
sdt->st = NULL; |
996 |
|
df->comp[0].cspec[0] = c_dfcolor; /* XXX monochrome for now */ |
997 |
|
df->comp[0].dist = sdt; |
1153 |
|
/* separate diffuse components */ |
1154 |
|
extract_diffuse(&sd->rLambFront, sd->rf); |
1155 |
|
extract_diffuse(&sd->rLambBack, sd->rb); |
1156 |
< |
extract_diffuse(&sd->tLamb, sd->tf); |
1156 |
> |
extract_diffuse(&sd->tLamb, (sd->tf != NULL) ? sd->tf : sd->tb); |
1157 |
|
/* return success */ |
1158 |
|
return SDEnone; |
1159 |
|
} |