10 |
|
* |
11 |
|
*/ |
12 |
|
|
13 |
+ |
#define _USE_MATH_DEFINES |
14 |
|
#include "rtio.h" |
15 |
|
#include <stdlib.h> |
16 |
|
#include <math.h> |
29 |
|
static const unsigned iwmax = (1<<(sizeof(unsigned)*4))-1; |
30 |
|
/* maximum cumulative value */ |
31 |
|
static const unsigned cumlmax = ~0; |
32 |
+ |
/* constant z-vector */ |
33 |
+ |
static const FVECT zvec = {.0, .0, 1.}; |
34 |
|
|
35 |
|
/* Struct used for our distribution-building callback */ |
36 |
|
typedef struct { |
64 |
|
if (lg < 0) { |
65 |
|
st = (SDNode *)malloc(sizeof(SDNode) + |
66 |
|
sizeof(st->u.t[0])*((1<<nd) - 1)); |
67 |
< |
if (st != NULL) |
65 |
< |
memset(st->u.t, 0, sizeof(st->u.t[0])<<nd); |
66 |
< |
} else |
67 |
< |
st = (SDNode *)malloc(sizeof(SDNode) + |
68 |
< |
sizeof(st->u.v[0])*((1 << nd*lg) - 1)); |
69 |
< |
|
70 |
< |
if (st == NULL) { |
71 |
< |
if (lg < 0) |
67 |
> |
if (st == NULL) { |
68 |
|
sprintf(SDerrorDetail, |
69 |
|
"Cannot allocate %d branch BSDF tree", 1<<nd); |
70 |
< |
else |
70 |
> |
return NULL; |
71 |
> |
} |
72 |
> |
memset(st->u.t, 0, sizeof(st->u.t[0])<<nd); |
73 |
> |
} else { |
74 |
> |
st = (SDNode *)malloc(sizeof(SDNode) + |
75 |
> |
sizeof(st->u.v[0])*((1 << nd*lg) - 1)); |
76 |
> |
if (st == NULL) { |
77 |
|
sprintf(SDerrorDetail, |
78 |
|
"Cannot allocate %d BSDF leaves", 1 << nd*lg); |
79 |
< |
return NULL; |
79 |
> |
return NULL; |
80 |
> |
} |
81 |
|
} |
82 |
|
st->ndim = nd; |
83 |
|
st->log2GR = lg; |
88 |
|
static void |
89 |
|
SDfreeTre(SDNode *st) |
90 |
|
{ |
91 |
< |
int i; |
91 |
> |
int n; |
92 |
|
|
93 |
|
if (st == NULL) |
94 |
|
return; |
95 |
< |
for (i = (st->log2GR < 0) << st->ndim; i--; ) |
96 |
< |
SDfreeTre(st->u.t[i]); |
97 |
< |
free((void *)st); |
95 |
> |
for (n = (st->log2GR < 0) << st->ndim; n--; ) |
96 |
> |
SDfreeTre(st->u.t[n]); |
97 |
> |
free(st); |
98 |
|
} |
99 |
|
|
100 |
|
/* Free a variable-resolution BSDF */ |
128 |
|
static float * |
129 |
|
grid_branch_start(SDNode *st, int n) |
130 |
|
{ |
131 |
< |
unsigned skipsiz = 1 << st->log2GR; |
131 |
> |
unsigned skipsiz = 1 << (st->log2GR - 1); |
132 |
|
float *vptr = st->u.v; |
133 |
|
int i; |
134 |
|
|
135 |
|
for (i = st->ndim; i--; skipsiz <<= st->log2GR) |
136 |
|
if (1<<i & n) |
137 |
< |
vptr += skipsiz >> 1; |
137 |
> |
vptr += skipsiz; |
138 |
|
return vptr; |
139 |
|
} |
140 |
|
|
154 |
|
return NULL; /* propogate error up call stack */ |
155 |
|
match &= (st->u.t[n]->log2GR == st->u.t[0]->log2GR); |
156 |
|
} |
157 |
< |
if (match && st->u.t[0]->log2GR >= 0) { |
158 |
< |
SDNode *stn = SDnewNode(st->ndim, st->u.t[0]->log2GR + 1); |
157 |
> |
if (match && (match = st->u.t[0]->log2GR) >= 0) { |
158 |
> |
SDNode *stn = SDnewNode(st->ndim, match + 1); |
159 |
|
if (stn == NULL) /* out of memory? */ |
160 |
|
return st; |
161 |
|
/* transfer values to new grid */ |
162 |
|
for (n = 1 << st->ndim; n--; ) |
163 |
|
fill_grid_branch(grid_branch_start(stn, n), |
164 |
< |
st->u.t[n]->u.v, st->ndim, st->log2GR); |
164 |
> |
st->u.t[n]->u.v, stn->ndim, stn->log2GR); |
165 |
|
SDfreeTre(st); /* free old tree */ |
166 |
|
st = stn; /* return new one */ |
167 |
|
} |
190 |
|
static double |
191 |
|
SDiterSum(const float *va, int nd, int shft, const int *imin, const int *imax) |
192 |
|
{ |
193 |
< |
const unsigned skipsiz = 1 << nd*shft; |
193 |
> |
const unsigned skipsiz = 1 << --nd*shft; |
194 |
|
double sum = .0; |
195 |
|
int i; |
196 |
< |
|
196 |
> |
|
197 |
> |
va += *imin * skipsiz; |
198 |
> |
|
199 |
|
if (skipsiz == 1) |
200 |
|
for (i = *imin; i < *imax; i++) |
201 |
< |
sum += va[i]; |
201 |
> |
sum += *va++; |
202 |
|
else |
203 |
< |
for (i = *imin; i < *imax; i++) |
204 |
< |
sum += SDiterSum(va + i*skipsiz, |
200 |
< |
nd-1, shft, imin+1, imax+1); |
203 |
> |
for (i = *imin; i < *imax; i++, va += skipsiz) |
204 |
> |
sum += SDiterSum(va, nd, shft, imin+1, imax+1); |
205 |
|
return sum; |
206 |
|
} |
207 |
|
|
209 |
|
static double |
210 |
|
SDavgTreBox(const SDNode *st, const double *bmin, const double *bmax) |
211 |
|
{ |
208 |
– |
int imin[SD_MAXDIM], imax[SD_MAXDIM]; |
212 |
|
unsigned n; |
213 |
|
int i; |
214 |
|
|
218 |
|
for (i = st->ndim; i--; ) { |
219 |
|
if (bmin[i] >= 1.) |
220 |
|
return .0; |
221 |
< |
if (bmax[i] <= .0) |
221 |
> |
if (bmax[i] <= 0) |
222 |
|
return .0; |
223 |
|
if (bmin[i] >= bmax[i]) |
224 |
|
return .0; |
226 |
|
if (st->log2GR < 0) { /* iterate on subtree */ |
227 |
|
double sum = .0, wsum = 1e-20; |
228 |
|
double sbmin[SD_MAXDIM], sbmax[SD_MAXDIM], w; |
226 |
– |
|
229 |
|
for (n = 1 << st->ndim; n--; ) { |
230 |
|
w = 1.; |
231 |
|
for (i = st->ndim; i--; ) { |
237 |
|
} |
238 |
|
if (sbmin[i] < .0) sbmin[i] = .0; |
239 |
|
if (sbmax[i] > 1.) sbmax[i] = 1.; |
240 |
+ |
if (sbmin[i] >= sbmax[i]) { |
241 |
+ |
w = .0; |
242 |
+ |
break; |
243 |
+ |
} |
244 |
|
w *= sbmax[i] - sbmin[i]; |
245 |
|
} |
246 |
|
if (w > 1e-10) { |
249 |
|
} |
250 |
|
} |
251 |
|
return sum / wsum; |
252 |
+ |
} else { /* iterate over leaves */ |
253 |
+ |
int imin[SD_MAXDIM], imax[SD_MAXDIM]; |
254 |
+ |
|
255 |
+ |
n = 1; |
256 |
+ |
for (i = st->ndim; i--; ) { |
257 |
+ |
imin[i] = (bmin[i] <= 0) ? 0 : |
258 |
+ |
(int)((1 << st->log2GR)*bmin[i]); |
259 |
+ |
imax[i] = (bmax[i] >= 1.) ? (1 << st->log2GR) : |
260 |
+ |
(int)((1 << st->log2GR)*bmax[i] + .999999); |
261 |
+ |
n *= imax[i] - imin[i]; |
262 |
+ |
} |
263 |
+ |
if (n) |
264 |
+ |
return SDiterSum(st->u.v, st->ndim, |
265 |
+ |
st->log2GR, imin, imax) / (double)n; |
266 |
|
} |
267 |
< |
n = 1; /* iterate over leaves */ |
248 |
< |
for (i = st->ndim; i--; ) { |
249 |
< |
imin[i] = (bmin[i] <= 0) ? 0 |
250 |
< |
: (int)((1 << st->log2GR)*bmin[i]); |
251 |
< |
imax[i] = (bmax[i] >= 1.) ? (1 << st->log2GR) |
252 |
< |
: (int)((1 << st->log2GR)*bmax[i] + .999999); |
253 |
< |
n *= imax[i] - imin[i]; |
254 |
< |
} |
255 |
< |
if (!n) |
256 |
< |
return .0; |
257 |
< |
|
258 |
< |
return SDiterSum(st->u.v, st->ndim, st->log2GR, imin, imax) / (double)n; |
267 |
> |
return .0; |
268 |
|
} |
269 |
|
|
270 |
|
/* Recursive call for SDtraverseTre() */ |
279 |
|
/* in branches? */ |
280 |
|
if (st->log2GR < 0) { |
281 |
|
unsigned skipmask = 0; |
273 |
– |
|
282 |
|
csiz *= .5; |
283 |
|
for (i = st->ndim; i--; ) |
284 |
|
if (1<<i & cmask) |
285 |
|
if (pos[i] < cmin[i] + csiz) |
286 |
< |
for (n = 1 << st->ndim; n--; ) |
286 |
> |
for (n = 1 << st->ndim; n--; ) { |
287 |
|
if (n & 1<<i) |
288 |
|
skipmask |= 1<<n; |
289 |
+ |
} |
290 |
|
else |
291 |
< |
for (n = 1 << st->ndim; n--; ) |
291 |
> |
for (n = 1 << st->ndim; n--; ) { |
292 |
|
if (!(n & 1<<i)) |
293 |
|
skipmask |= 1<<n; |
294 |
+ |
} |
295 |
|
for (n = 1 << st->ndim; n--; ) { |
296 |
|
if (1<<n & skipmask) |
297 |
|
continue; |
325 |
|
clim[i][0] = 0; |
326 |
|
clim[i][1] = 1 << st->log2GR; |
327 |
|
} |
318 |
– |
/* fill in unused dimensions */ |
319 |
– |
for (i = SD_MAXDIM; i-- > st->ndim; ) { |
320 |
– |
clim[i][0] = 0; clim[i][1] = 1; |
321 |
– |
} |
328 |
|
#if (SD_MAXDIM == 4) |
329 |
|
bmin[0] = cmin[0] + csiz*clim[0][0]; |
330 |
|
for (cpos[0] = clim[0][0]; cpos[0] < clim[0][1]; cpos[0]++) { |
331 |
|
bmin[1] = cmin[1] + csiz*clim[1][0]; |
332 |
|
for (cpos[1] = clim[1][0]; cpos[1] < clim[1][1]; cpos[1]++) { |
333 |
|
bmin[2] = cmin[2] + csiz*clim[2][0]; |
334 |
< |
for (cpos[2] = clim[2][0]; cpos[2] < clim[2][1]; cpos[2]++) { |
335 |
< |
bmin[3] = cmin[3] + csiz*(cpos[3] = clim[3][0]); |
334 |
> |
if (st->ndim == 3) { |
335 |
> |
cpos[2] = clim[2][0]; |
336 |
|
n = cpos[0]; |
337 |
< |
for (i = 1; i < st->ndim; i++) |
337 |
> |
for (i = 1; i < 3; i++) |
338 |
|
n = (n << st->log2GR) + cpos[i]; |
339 |
< |
for ( ; cpos[3] < clim[3][1]; cpos[3]++) { |
339 |
> |
for ( ; cpos[2] < clim[2][1]; cpos[2]++) { |
340 |
|
rval += rv = (*cf)(st->u.v[n++], bmin, csiz, cptr); |
341 |
|
if (rv < 0) |
342 |
|
return rv; |
343 |
< |
bmin[3] += csiz; |
343 |
> |
bmin[2] += csiz; |
344 |
|
} |
345 |
< |
bmin[2] += csiz; |
345 |
> |
} else { |
346 |
> |
for (cpos[2] = clim[2][0]; cpos[2] < clim[2][1]; cpos[2]++) { |
347 |
> |
bmin[3] = cmin[3] + csiz*(cpos[3] = clim[3][0]); |
348 |
> |
n = cpos[0]; |
349 |
> |
for (i = 1; i < 4; i++) |
350 |
> |
n = (n << st->log2GR) + cpos[i]; |
351 |
> |
for ( ; cpos[3] < clim[3][1]; cpos[3]++) { |
352 |
> |
rval += rv = (*cf)(st->u.v[n++], bmin, csiz, cptr); |
353 |
> |
if (rv < 0) |
354 |
> |
return rv; |
355 |
> |
bmin[3] += csiz; |
356 |
> |
} |
357 |
> |
bmin[2] += csiz; |
358 |
> |
} |
359 |
|
} |
360 |
|
bmin[1] += csiz; |
361 |
|
} |
430 |
|
static float |
431 |
|
SDqueryTre(const SDTre *sdt, const FVECT outVec, const FVECT inVec, double *hc) |
432 |
|
{ |
414 |
– |
static const FVECT zvec = {.0, .0, 1.}; |
433 |
|
FVECT rOutVec; |
434 |
|
double gridPos[4]; |
435 |
|
|
451 |
|
} |
452 |
|
/* convert vector coordinates */ |
453 |
|
if (sdt->st->ndim == 3) { |
454 |
< |
spinvector(rOutVec, outVec, zvec, -atan2(inVec[1],inVec[0])); |
454 |
> |
spinvector(rOutVec, outVec, zvec, -atan2(-inVec[1],-inVec[0])); |
455 |
|
gridPos[0] = .5 - .5*sqrt(inVec[0]*inVec[0] + inVec[1]*inVec[1]); |
456 |
|
SDdisk2square(gridPos+1, rOutVec[0], rOutVec[1]); |
457 |
|
} else if (sdt->st->ndim == 4) { |
492 |
|
sp->wmax = wid; |
493 |
|
if (sp->alen >= sp->nall) { /* need more space? */ |
494 |
|
struct outdir_s *ndarr; |
495 |
< |
sp->nall += 8192; |
495 |
> |
sp->nall += 1024; |
496 |
|
ndarr = (struct outdir_s *)realloc(sp->darr, |
497 |
|
sizeof(struct outdir_s)*sp->nall); |
498 |
< |
if (ndarr == NULL) |
498 |
> |
if (ndarr == NULL) { |
499 |
> |
sprintf(SDerrorDetail, |
500 |
> |
"Cannot grow scaffold to %u entries", sp->nall); |
501 |
|
return -1; /* abort build */ |
502 |
+ |
} |
503 |
|
sp->darr = ndarr; |
504 |
|
} |
505 |
|
/* find Hilbert entry index */ |
506 |
|
bmin[0] = cmin[0]*(double)iwmax + .5; |
507 |
|
bmin[1] = cmin[1]*(double)iwmax + .5; |
508 |
< |
bmax[0] = bmin[0] + wid; |
509 |
< |
bmax[1] = bmin[1] + wid; |
508 |
> |
bmax[0] = bmin[0] + wid-1; |
509 |
> |
bmax[1] = bmin[1] + wid-1; |
510 |
|
hilbert_box_vtx(2, sizeof(bitmask_t), iwbits, 1, bmin, bmax); |
511 |
|
sp->darr[sp->alen].hent = hilbert_c2i(2, iwbits, bmin); |
512 |
|
sp->darr[sp->alen].wid = wid; |
519 |
|
static int |
520 |
|
sscmp(const void *p1, const void *p2) |
521 |
|
{ |
522 |
< |
return (int)((*(const struct outdir_s *)p1).hent - |
523 |
< |
(*(const struct outdir_s *)p2).hent); |
522 |
> |
unsigned h1 = (*(const struct outdir_s *)p1).hent; |
523 |
> |
unsigned h2 = (*(const struct outdir_s *)p2).hent; |
524 |
> |
|
525 |
> |
if (h1 > h2) |
526 |
> |
return 1; |
527 |
> |
if (h1 < h2) |
528 |
> |
return -1; |
529 |
> |
return 0; |
530 |
|
} |
531 |
|
|
532 |
|
/* Create a new cumulative distribution for the given input direction */ |
543 |
|
myScaffold.wmax = 0; |
544 |
|
myScaffold.nic = sdt->st->ndim - 2; |
545 |
|
myScaffold.alen = 0; |
546 |
< |
myScaffold.nall = 8192; |
546 |
> |
myScaffold.nall = 512; |
547 |
|
myScaffold.darr = (struct outdir_s *)malloc(sizeof(struct outdir_s) * |
548 |
|
myScaffold.nall); |
549 |
|
if (myScaffold.darr == NULL) |
558 |
|
cd = (SDTreCDst *)malloc(sizeof(SDTreCDst) + |
559 |
|
sizeof(cd->carr[0])*myScaffold.alen); |
560 |
|
if (cd == NULL) { |
561 |
+ |
sprintf(SDerrorDetail, |
562 |
+ |
"Cannot allocate %u entry cumulative distribution", |
563 |
+ |
myScaffold.alen); |
564 |
|
free(myScaffold.darr); |
565 |
|
return NULL; |
566 |
|
} |
567 |
+ |
cd->isodist = (myScaffold.nic == 1); |
568 |
|
/* sort the distribution */ |
569 |
|
qsort(myScaffold.darr, cd->calen = myScaffold.alen, |
570 |
|
sizeof(struct outdir_s), &sscmp); |
575 |
|
cd->clim[i][0] = floor(pos[i]/scale) * scale; |
576 |
|
cd->clim[i][1] = cd->clim[i][0] + scale; |
577 |
|
} |
578 |
+ |
if (cd->isodist) { /* avoid issue in SDqueryTreProjSA() */ |
579 |
+ |
cd->clim[1][0] = cd->clim[0][0]; |
580 |
+ |
cd->clim[1][1] = cd->clim[0][1]; |
581 |
+ |
} |
582 |
|
cd->max_psa = myScaffold.wmax / (double)iwmax; |
583 |
|
cd->max_psa *= cd->max_psa * M_PI; |
584 |
|
cd->sidef = sdt->sidef; |
608 |
|
{ |
609 |
|
const SDTre *sdt; |
610 |
|
double inCoord[2]; |
576 |
– |
int vflags; |
611 |
|
int i; |
612 |
|
SDTreCDst *cd, *cdlast; |
613 |
|
/* check arguments */ |
622 |
|
return NULL; /* should be internal error */ |
623 |
|
cdlast = NULL; /* check for direction in cache list */ |
624 |
|
for (cd = (SDTreCDst *)sdc->cdList; cd != NULL; |
625 |
< |
cdlast = cd, cd = (SDTreCDst *)cd->next) { |
625 |
> |
cdlast = cd, cd = cd->next) { |
626 |
|
for (i = sdt->st->ndim - 2; i--; ) |
627 |
|
if ((cd->clim[i][0] > inCoord[i]) | |
628 |
|
(inCoord[i] >= cd->clim[i][1])) |
634 |
|
cdlast = cd = make_cdist(sdt, inCoord); |
635 |
|
if (cdlast != NULL) { /* move entry to head of cache list */ |
636 |
|
cdlast->next = cd->next; |
637 |
< |
cd->next = sdc->cdList; |
637 |
> |
cd->next = (SDTreCDst *)sdc->cdList; |
638 |
|
sdc->cdList = (SDCDst *)cd; |
639 |
|
} |
640 |
|
return (SDCDst *)cd; /* ready to go */ |
697 |
|
const SDTreCDst *cd = (const SDTreCDst *)cdp; |
698 |
|
const unsigned target = randX*cumlmax; |
699 |
|
bitmask_t hndx, hcoord[2]; |
700 |
< |
double gpos[3]; |
700 |
> |
double gpos[3], rotangle; |
701 |
|
int i, iupper, ilower; |
702 |
|
/* check arguments */ |
703 |
|
if ((ioVec == NULL) | (cd == NULL)) |
710 |
|
/* binary search to find position */ |
711 |
|
ilower = 0; iupper = cd->calen; |
712 |
|
while ((i = (iupper + ilower) >> 1) != ilower) |
713 |
< |
if ((long)target >= (long)cd->carr[i].cuml) |
713 |
> |
if (target >= cd->carr[i].cuml) |
714 |
|
ilower = i; |
715 |
|
else |
716 |
|
iupper = i; |
733 |
|
/* emit from back? */ |
734 |
|
if (ioVec[2] > 0 ^ cd->sidef != SD_XMIT) |
735 |
|
gpos[2] = -gpos[2]; |
736 |
< |
VCOPY(ioVec, gpos); |
736 |
> |
if (cd->isodist) { /* rotate isotropic result */ |
737 |
> |
rotangle = atan2(-ioVec[1],-ioVec[0]); |
738 |
> |
VCOPY(ioVec, gpos); |
739 |
> |
spinvector(ioVec, ioVec, zvec, rotangle); |
740 |
> |
} else |
741 |
> |
VCOPY(ioVec, gpos); |
742 |
|
return SDEnone; |
743 |
|
} |
744 |
|
|
751 |
|
return **spp; |
752 |
|
} |
753 |
|
|
754 |
+ |
/* Advance pointer past matching token (or any token if c==0) */ |
755 |
+ |
#define eat_token(spp,c) (next_token(spp)==(c) ^ !(c) ? *(*(spp))++ : 0) |
756 |
+ |
|
757 |
|
/* Count words from this point in string to '}' */ |
758 |
|
static int |
759 |
|
count_values(char *cp) |
760 |
|
{ |
761 |
|
int n = 0; |
762 |
|
|
763 |
< |
while (next_token(&cp) != '}') { |
764 |
< |
if (*cp == '{') |
765 |
< |
return -1; |
766 |
< |
while (*cp && !isspace(*cp)) |
725 |
< |
++cp; |
763 |
> |
while (next_token(&cp) != '}' && *cp) { |
764 |
> |
while (!isspace(*cp) & (*cp != ',') & (*cp != '}')) |
765 |
> |
if (!*++cp) |
766 |
> |
break; |
767 |
|
++n; |
768 |
< |
cp += (next_token(&cp) == ','); |
768 |
> |
eat_token(&cp, ','); |
769 |
|
} |
770 |
|
return n; |
771 |
|
} |
780 |
|
while (n-- > 0 && (svnext = fskip(*spp)) != NULL) { |
781 |
|
*v++ = atof(*spp); |
782 |
|
*spp = svnext; |
783 |
< |
*spp += (next_token(spp) == ','); |
783 |
> |
eat_token(spp, ','); |
784 |
|
} |
785 |
|
return v - va; |
786 |
|
} |
792 |
|
SDNode *st; |
793 |
|
int n; |
794 |
|
|
795 |
< |
if (next_token(spp) != '{') { |
795 |
> |
if (!eat_token(spp, '{')) { |
796 |
|
strcpy(SDerrorDetail, "Missing '{' in tensor tree"); |
797 |
|
return NULL; |
798 |
|
} |
758 |
– |
++*spp; /* in tree, now */ |
799 |
|
if (next_token(spp) == '{') { /* tree branches */ |
800 |
|
st = SDnewNode(nd, -1); |
801 |
|
if (st == NULL) |
808 |
|
} else { /* else load value grid */ |
809 |
|
int bsiz; |
810 |
|
n = count_values(*spp); /* see how big the grid is */ |
811 |
< |
if (n <= 0) { |
772 |
< |
strcpy(SDerrorDetail, "Bad tensor tree data"); |
773 |
< |
return NULL; |
774 |
< |
} |
775 |
< |
for (bsiz = 0; bsiz < 8*sizeof(size_t)-1; bsiz += nd) |
811 |
> |
for (bsiz = 0; bsiz < 8*sizeof(size_t); bsiz += nd) |
812 |
|
if (1<<bsiz == n) |
813 |
|
break; |
814 |
|
if (bsiz >= 8*sizeof(size_t)) { |
824 |
|
return NULL; |
825 |
|
} |
826 |
|
} |
827 |
< |
if (next_token(spp) != '}') { |
827 |
> |
if (!eat_token(spp, '}')) { |
828 |
|
strcpy(SDerrorDetail, "Missing '}' in tensor tree"); |
829 |
|
SDfreeTre(st); |
830 |
|
return NULL; |
831 |
|
} |
832 |
< |
++*spp; /* walk past close and return */ |
797 |
< |
*spp += (next_token(spp) == ','); |
832 |
> |
eat_token(spp, ','); |
833 |
|
return st; |
834 |
|
} |
835 |
|
|
880 |
|
SDSpectralDF *df; |
881 |
|
SDTre *sdt; |
882 |
|
char *sdata; |
848 |
– |
int i; |
883 |
|
/* allocate BSDF component */ |
884 |
|
sdata = ezxml_txt(ezxml_child(wdb, "WavelengthDataDirection")); |
885 |
|
if (!sdata) |
956 |
|
static float |
957 |
|
SDgetTreMin(const SDNode *st) |
958 |
|
{ |
959 |
< |
float vmin = 1./M_PI; |
959 |
> |
float vmin = FHUGE; |
960 |
|
int n; |
961 |
|
|
962 |
|
if (st->log2GR < 0) { |
984 |
|
SDsubtractTreVal(st->u.t[n], val); |
985 |
|
} else { |
986 |
|
for (n = 1<<(st->ndim*st->log2GR); n--; ) |
987 |
< |
st->u.v[n] -= val; |
987 |
> |
if ((st->u.v[n] -= val) < 0) |
988 |
> |
st->u.v[n] = .0f; |
989 |
|
} |
990 |
|
} |
991 |
|
|
995 |
|
{ |
996 |
|
float vmin; |
997 |
|
/* be sure to skip unused portion */ |
998 |
< |
if ((st->ndim == 3) & (st->log2GR < 0)) { |
999 |
< |
float v; |
965 |
< |
int i; |
998 |
> |
if (st->ndim == 3) { |
999 |
> |
int n; |
1000 |
|
vmin = 1./M_PI; |
1001 |
< |
for (i = 0; i < 4; i++) { |
1002 |
< |
v = SDgetTreMin(st->u.t[i]); |
1003 |
< |
if (v < vmin) |
1004 |
< |
vmin = v; |
1005 |
< |
} |
1001 |
> |
if (st->log2GR < 0) { |
1002 |
> |
for (n = 0; n < 8; n += 2) { |
1003 |
> |
float v = SDgetTreMin(st->u.t[n]); |
1004 |
> |
if (v < vmin) |
1005 |
> |
vmin = v; |
1006 |
> |
} |
1007 |
> |
} else if (st->log2GR) { |
1008 |
> |
for (n = 1 << (3*st->log2GR - 1); n--; ) |
1009 |
> |
if (st->u.v[n] < vmin) |
1010 |
> |
vmin = st->u.v[n]; |
1011 |
> |
} else |
1012 |
> |
vmin = st->u.v[0]; |
1013 |
|
} else /* anisotropic covers entire tree */ |
1014 |
|
vmin = SDgetTreMin(st); |
1015 |
|
|
1016 |
|
if (vmin <= FTINY) |
1017 |
|
return .0; |
1018 |
|
|
1019 |
< |
SDsubtractTreMin(st, vmin); |
1019 |
> |
SDsubtractTreVal(st, vmin); |
1020 |
|
|
1021 |
|
return M_PI * vmin; /* return hemispherical value */ |
1022 |
|
} |
1033 |
|
return; |
1034 |
|
} |
1035 |
|
dv->spec = df->comp[0].cspec[0]; |
1036 |
< |
dv->cieY = subtract_min((*(SDTre *)df->comp[n].dist).st); |
1036 |
> |
dv->cieY = subtract_min((*(SDTre *)df->comp[0].dist).st); |
1037 |
|
/* in case of multiple components */ |
1038 |
|
for (n = df->ncomp; --n; ) { |
1039 |
|
double ymin = subtract_min((*(SDTre *)df->comp[n].dist).st); |