11 |
|
* |
12 |
|
*/ |
13 |
|
|
14 |
+ |
#define _USE_MATH_DEFINES |
15 |
|
#include "rtio.h" |
16 |
|
#include <stdlib.h> |
17 |
|
#include <math.h> |
82 |
|
static int |
83 |
|
fequal(double a, double b) |
84 |
|
{ |
85 |
< |
if (b != .0) |
85 |
> |
if (b != 0) |
86 |
|
a = a/b - 1.; |
87 |
|
return (a <= 1e-6) & (a >= -1e-6); |
88 |
|
} |
89 |
|
|
89 |
– |
/* Returns the name of the given tag */ |
90 |
– |
#ifdef ezxml_name |
91 |
– |
#undef ezxml_name |
92 |
– |
static char * |
93 |
– |
ezxml_name(ezxml_t xml) |
94 |
– |
{ |
95 |
– |
if (xml == NULL) |
96 |
– |
return NULL; |
97 |
– |
return xml->name; |
98 |
– |
} |
99 |
– |
#endif |
100 |
– |
|
90 |
|
/* Returns the given tag's character content or empty string if none */ |
91 |
|
#ifdef ezxml_txt |
92 |
|
#undef ezxml_txt |
178 |
|
{ |
179 |
|
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
180 |
|
int li, ndx; |
181 |
< |
double pol, azi, d; |
181 |
> |
double pol, azi; |
182 |
|
|
183 |
|
if (v == NULL) |
184 |
|
return -1; |
185 |
< |
if ((v[2] < .0) | (v[2] > 1.0)) |
185 |
> |
if ((v[2] < 0) | (v[2] > 1.)) |
186 |
|
return -1; |
187 |
|
pol = 180.0/M_PI*acos(v[2]); |
188 |
|
azi = 180.0/M_PI*atan2(v[1], v[0]); |
341 |
|
"ThetaBounds"), "LowerTheta"))), |
342 |
|
abase_list[nabases].lat[i].tmin)) { |
343 |
|
sprintf(SDerrorDetail, "Theta values disagree in '%s'", |
344 |
< |
abname); |
344 |
> |
abname); |
345 |
|
return RC_DATERR; |
346 |
|
} |
347 |
|
abase_list[nabases].nangles += |
351 |
|
(abase_list[nabases].lat[i].nphis == 1 && |
352 |
|
abase_list[nabases].lat[i].tmin > FTINY)) { |
353 |
|
sprintf(SDerrorDetail, "Illegal phi count in '%s'", |
354 |
< |
abname); |
354 |
> |
abname); |
355 |
|
return RC_DATERR; |
356 |
|
} |
357 |
|
} |
407 |
|
int i; |
408 |
|
/* allocate BSDF component */ |
409 |
|
sdata = ezxml_txt(ezxml_child(wdb, "WavelengthDataDirection")); |
410 |
+ |
if (!sdata) |
411 |
+ |
return RC_FAIL; |
412 |
|
/* |
413 |
|
* Remember that front and back are reversed from WINDOW 6 orientations |
414 |
|
* Favor their "Front" (incoming light) since that's more often valid |
498 |
|
df->comp[0].dist = dp; |
499 |
|
df->comp[0].func = &SDhandleMtx; |
500 |
|
/* read BSDF data */ |
501 |
< |
sdata = ezxml_txt(ezxml_child(wdb,"ScatteringData")); |
501 |
> |
sdata = ezxml_txt(ezxml_child(wdb, "ScatteringData")); |
502 |
|
if (!sdata || !*sdata) { |
503 |
|
sprintf(SDerrorDetail, "Missing BSDF ScatteringData in '%s'", |
504 |
|
sd->name); |
512 |
|
sd->name); |
513 |
|
return RC_FORMERR; |
514 |
|
} |
515 |
< |
while (*sdnext && isspace(*sdnext)) |
515 |
> |
while (isspace(*sdnext)) |
516 |
|
sdnext++; |
517 |
|
if (*sdnext == ',') sdnext++; |
518 |
|
if (rowinc) { |
519 |
|
int r = i/dp->nout; |
520 |
< |
int c = i - c*dp->nout; |
520 |
> |
int c = i - r*dp->nout; |
521 |
|
mBSDF_value(dp,r,c) = atof(sdata); |
522 |
|
} else |
523 |
|
dp->bsdf[i] = atof(sdata); |
537 |
|
for (i = n; --i; ) |
538 |
|
if (sm->bsdf[i] < minv) |
539 |
|
minv = sm->bsdf[i]; |
540 |
+ |
|
541 |
+ |
if (minv <= FTINY) |
542 |
+ |
return .0; |
543 |
+ |
|
544 |
|
for (i = n; i--; ) |
545 |
|
sm->bsdf[i] -= minv; |
546 |
|
|
566 |
|
c_cmix(&dv->spec, dv->cieY, &dv->spec, ymin, &df->comp[n].cspec[0]); |
567 |
|
dv->cieY += ymin; |
568 |
|
} |
569 |
< |
df->maxHemi -= dv->cieY; /* adjust minimum hemispherical */ |
569 |
> |
df->maxHemi -= dv->cieY; /* adjust maximum hemispherical */ |
570 |
|
/* make sure everything is set */ |
571 |
|
c_ccvt(&dv->spec, C_CSXY+C_CSSPEC); |
572 |
|
} |
575 |
|
SDError |
576 |
|
SDloadMtx(SDData *sd, ezxml_t wtl) |
577 |
|
{ |
578 |
< |
ezxml_t wld, wdb; |
579 |
< |
int rowIn; |
580 |
< |
struct BSDF_data *dp; |
581 |
< |
char *txt; |
582 |
< |
int rval; |
588 |
< |
|
578 |
> |
ezxml_t wld, wdb; |
579 |
> |
int rowIn; |
580 |
> |
char *txt; |
581 |
> |
int rval; |
582 |
> |
/* basic checks and data ordering */ |
583 |
|
txt = ezxml_txt(ezxml_child(ezxml_child(wtl, |
584 |
|
"DataDefinition"), "IncidentDataStructure")); |
585 |
|
if (txt == NULL || !*txt) { |
598 |
|
sd->name); |
599 |
|
return SDEsupport; |
600 |
|
} |
601 |
< |
/* get angle basis */ |
601 |
> |
/* get angle basis */ |
602 |
|
rval = load_angle_basis(ezxml_child(ezxml_child(wtl, |
603 |
|
"DataDefinition"), "AngleBasis")); |
604 |
|
if (rval < 0) |
605 |
|
return convert_errcode(rval); |
606 |
< |
/* load BSDF components */ |
606 |
> |
/* load BSDF components */ |
607 |
|
for (wld = ezxml_child(wtl, "WavelengthData"); |
608 |
|
wld != NULL; wld = wld->next) { |
609 |
|
if (strcasecmp(ezxml_txt(ezxml_child(wld,"Wavelength")), |
614 |
|
if ((rval = load_bsdf_data(sd, wdb, rowIn)) < 0) |
615 |
|
return convert_errcode(rval); |
616 |
|
} |
617 |
< |
/* separate diffuse components */ |
617 |
> |
/* separate diffuse components */ |
618 |
|
extract_diffuse(&sd->rLambFront, sd->rf); |
619 |
|
extract_diffuse(&sd->rLambBack, sd->rb); |
620 |
|
extract_diffuse(&sd->tLamb, sd->tf); |
621 |
< |
/* return success */ |
621 |
> |
/* return success */ |
622 |
|
return SDEnone; |
623 |
|
} |
624 |
|
|
625 |
|
/* Get Matrix BSDF value */ |
626 |
|
static int |
627 |
|
SDgetMtxBSDF(float coef[SDmaxCh], const FVECT outVec, |
628 |
< |
const FVECT inVec, const void *dist) |
628 |
> |
const FVECT inVec, SDComponent *sdc) |
629 |
|
{ |
630 |
< |
const SDMat *dp = (const SDMat *)dist; |
630 |
> |
const SDMat *dp; |
631 |
|
int i_ndx, o_ndx; |
632 |
+ |
/* check arguments */ |
633 |
+ |
if ((coef == NULL) | (outVec == NULL) | (inVec == NULL) | (sdc == NULL) |
634 |
+ |
|| (dp = (SDMat *)sdc->dist) == NULL) |
635 |
+ |
return 0; |
636 |
|
/* get angle indices */ |
637 |
|
i_ndx = mBSDF_incndx(dp, inVec); |
638 |
|
o_ndx = mBSDF_outndx(dp, outVec); |
647 |
|
return 1; /* XXX monochrome for now */ |
648 |
|
} |
649 |
|
|
650 |
< |
/* Query solid angle for vector */ |
650 |
> |
/* Query solid angle for vector(s) */ |
651 |
|
static SDError |
652 |
< |
SDqueryMtxProjSA(double *psa, const FVECT vec, int qflags, const void *dist) |
652 |
> |
SDqueryMtxProjSA(double *psa, const FVECT v1, const RREAL *v2, |
653 |
> |
int qflags, SDComponent *sdc) |
654 |
|
{ |
655 |
< |
const SDMat *dp = (const SDMat *)dist; |
655 |
> |
const SDMat *dp; |
656 |
|
double inc_psa, out_psa; |
657 |
|
/* check arguments */ |
658 |
< |
if ((psa == NULL) | (vec == NULL) | (dp == NULL)) |
658 |
> |
if ((psa == NULL) | (v1 == NULL) | (sdc == NULL) || |
659 |
> |
(dp = (SDMat *)sdc->dist) == NULL) |
660 |
|
return SDEargument; |
661 |
+ |
if (v2 == NULL) |
662 |
+ |
v2 = v1; |
663 |
|
/* get projected solid angles */ |
664 |
< |
inc_psa = mBSDF_incohm(dp, mBSDF_incndx(dp, vec)); |
665 |
< |
out_psa = mBSDF_outohm(dp, mBSDF_outndx(dp, vec)); |
664 |
> |
out_psa = mBSDF_outohm(dp, mBSDF_outndx(dp, v1)); |
665 |
> |
inc_psa = mBSDF_incohm(dp, mBSDF_incndx(dp, v2)); |
666 |
> |
if ((v1 != v2) & (out_psa <= 0) & (inc_psa <= 0)) { |
667 |
> |
inc_psa = mBSDF_outohm(dp, mBSDF_outndx(dp, v2)); |
668 |
> |
out_psa = mBSDF_incohm(dp, mBSDF_incndx(dp, v1)); |
669 |
> |
} |
670 |
|
|
671 |
|
switch (qflags) { /* record based on flag settings */ |
666 |
– |
case SDqueryVal: |
667 |
– |
psa[0] = .0; |
668 |
– |
/* fall through */ |
672 |
|
case SDqueryMax: |
673 |
|
if (inc_psa > psa[0]) |
674 |
|
psa[0] = inc_psa; |
676 |
|
psa[0] = out_psa; |
677 |
|
break; |
678 |
|
case SDqueryMin+SDqueryMax: |
679 |
< |
if (inc_psa > psa[0]) |
679 |
> |
if (inc_psa > psa[1]) |
680 |
|
psa[1] = inc_psa; |
681 |
< |
if (out_psa > psa[0]) |
681 |
> |
if (out_psa > psa[1]) |
682 |
|
psa[1] = out_psa; |
683 |
|
/* fall through */ |
684 |
+ |
case SDqueryVal: |
685 |
+ |
if (qflags == SDqueryVal) |
686 |
+ |
psa[0] = M_PI; |
687 |
+ |
/* fall through */ |
688 |
|
case SDqueryMin: |
689 |
< |
if ((inc_psa > .0) & (inc_psa < psa[0])) |
689 |
> |
if ((inc_psa > 0) & (inc_psa < psa[0])) |
690 |
|
psa[0] = inc_psa; |
691 |
< |
if ((out_psa > .0) & (out_psa < psa[0])) |
691 |
> |
if ((out_psa > 0) & (out_psa < psa[0])) |
692 |
|
psa[0] = out_psa; |
693 |
|
break; |
694 |
|
} |
695 |
|
/* make sure it's legal */ |
696 |
< |
return (psa[0] <= .0) ? SDEinternal : SDEnone; |
696 |
> |
return (psa[0] <= 0) ? SDEinternal : SDEnone; |
697 |
|
} |
698 |
|
|
699 |
|
/* Compute new cumulative distribution from BSDF */ |
731 |
|
static const SDCDst * |
732 |
|
SDgetMtxCDist(const FVECT inVec, SDComponent *sdc) |
733 |
|
{ |
734 |
< |
SDMat *dp = (SDMat *)sdc->dist; |
734 |
> |
SDMat *dp; |
735 |
|
int reverse; |
736 |
|
SDMatCDst myCD; |
737 |
|
SDMatCDst *cd, *cdlast; |
738 |
|
/* check arguments */ |
739 |
< |
if ((inVec == NULL) | (dp == NULL)) |
739 |
> |
if ((inVec == NULL) | (sdc == NULL) || |
740 |
> |
(dp = (SDMat *)sdc->dist) == NULL) |
741 |
|
return NULL; |
742 |
|
memset(&myCD, 0, sizeof(myCD)); |
743 |
|
myCD.indx = mBSDF_incndx(dp, inVec); |
756 |
|
reverse = 1; |
757 |
|
} |
758 |
|
cdlast = NULL; /* check for it in cache list */ |
759 |
< |
for (cd = (SDMatCDst *)sdc->cdList; |
760 |
< |
cd != NULL; cd = (SDMatCDst *)cd->next) { |
759 |
> |
for (cd = (SDMatCDst *)sdc->cdList; cd != NULL; |
760 |
> |
cdlast = cd, cd = (SDMatCDst *)cd->next) |
761 |
|
if (cd->indx == myCD.indx && (cd->calen == myCD.calen) & |
762 |
|
(cd->ob_priv == myCD.ob_priv) & |
763 |
|
(cd->ob_vec == myCD.ob_vec)) |
764 |
|
break; |
757 |
– |
cdlast = cd; |
758 |
– |
} |
765 |
|
if (cd == NULL) { /* need to allocate new entry */ |
766 |
|
cd = (SDMatCDst *)malloc(sizeof(SDMatCDst) + |
767 |
< |
myCD.calen*sizeof(myCD.carr[0])); |
767 |
> |
sizeof(myCD.carr[0])*myCD.calen); |
768 |
|
if (cd == NULL) |
769 |
|
return NULL; |
770 |
|
*cd = myCD; /* compute cumulative distribution */ |
784 |
|
|
785 |
|
/* Sample cumulative distribution */ |
786 |
|
static SDError |
787 |
< |
SDsampMtxCDist(FVECT outVec, double randX, const SDCDst *cdp) |
787 |
> |
SDsampMtxCDist(FVECT ioVec, double randX, const SDCDst *cdp) |
788 |
|
{ |
789 |
|
const unsigned maxval = ~0; |
790 |
|
const SDMatCDst *mcd = (const SDMatCDst *)cdp; |
791 |
|
const unsigned target = randX*maxval; |
792 |
|
int i, iupper, ilower; |
793 |
|
/* check arguments */ |
794 |
< |
if ((outVec == NULL) | (mcd == NULL)) |
794 |
> |
if ((ioVec == NULL) | (mcd == NULL)) |
795 |
|
return SDEargument; |
796 |
|
/* binary search to find index */ |
797 |
|
ilower = 0; iupper = mcd->calen; |
804 |
|
randX = (randX*maxval - mcd->carr[ilower]) / |
805 |
|
(double)(mcd->carr[iupper] - mcd->carr[ilower]); |
806 |
|
/* convert index to vector */ |
807 |
< |
if ((*mcd->ob_vec)(outVec, i+randX, mcd->ob_priv)) |
807 |
> |
if ((*mcd->ob_vec)(ioVec, i+randX, mcd->ob_priv)) |
808 |
|
return SDEnone; |
809 |
< |
strcpy(SDerrorDetail, "BSDF sampling fault"); |
809 |
> |
strcpy(SDerrorDetail, "Matrix BSDF sampling fault"); |
810 |
|
return SDEinternal; |
811 |
|
} |
812 |
|
|