11 |
|
* |
12 |
|
*/ |
13 |
|
|
14 |
+ |
#define _USE_MATH_DEFINES |
15 |
|
#include "rtio.h" |
16 |
|
#include <stdlib.h> |
17 |
|
#include <math.h> |
20 |
|
#include "bsdf.h" |
21 |
|
#include "bsdf_m.h" |
22 |
|
|
22 |
– |
#ifndef FTINY |
23 |
– |
#define FTINY 1e-6 |
24 |
– |
#endif |
25 |
– |
|
23 |
|
/* Function return codes */ |
24 |
|
#define RC_GOOD 1 |
25 |
|
#define RC_FAIL 0 |
29 |
|
#define RC_INTERR (-4) |
30 |
|
#define RC_MEMERR (-5) |
31 |
|
|
32 |
< |
#define MAXLATS 46 /* maximum number of latitudes */ |
36 |
< |
|
37 |
< |
/* BSDF angle specification */ |
38 |
< |
typedef struct { |
39 |
< |
char name[64]; /* basis name */ |
40 |
< |
int nangles; /* total number of directions */ |
41 |
< |
struct { |
42 |
< |
float tmin; /* starting theta */ |
43 |
< |
int nphis; /* number of phis (0 term) */ |
44 |
< |
} lat[MAXLATS+1]; /* latitudes */ |
45 |
< |
} ANGLE_BASIS; |
46 |
< |
|
47 |
< |
#define MAXABASES 7 /* limit on defined bases */ |
48 |
< |
|
49 |
< |
static ANGLE_BASIS abase_list[MAXABASES] = { |
32 |
> |
ANGLE_BASIS abase_list[MAXABASES] = { |
33 |
|
{ |
34 |
|
"LBNL/Klems Full", 145, |
35 |
< |
{ {-5., 1}, |
35 |
> |
{ {0., 1}, |
36 |
|
{5., 8}, |
37 |
|
{15., 16}, |
38 |
|
{25., 20}, |
44 |
|
{90., 0} } |
45 |
|
}, { |
46 |
|
"LBNL/Klems Half", 73, |
47 |
< |
{ {-6.5, 1}, |
47 |
> |
{ {0., 1}, |
48 |
|
{6.5, 8}, |
49 |
|
{19.5, 12}, |
50 |
|
{32.5, 16}, |
54 |
|
{90., 0} } |
55 |
|
}, { |
56 |
|
"LBNL/Klems Quarter", 41, |
57 |
< |
{ {-9., 1}, |
57 |
> |
{ {0., 1}, |
58 |
|
{9., 8}, |
59 |
|
{27., 12}, |
60 |
|
{46., 12}, |
63 |
|
} |
64 |
|
}; |
65 |
|
|
66 |
< |
static int nabases = 3; /* current number of defined bases */ |
66 |
> |
int nabases = 3; /* current number of defined bases */ |
67 |
|
|
68 |
|
static int |
69 |
|
fequal(double a, double b) |
70 |
|
{ |
71 |
< |
if (b != .0) |
71 |
> |
if (b != 0) |
72 |
|
a = a/b - 1.; |
73 |
|
return (a <= 1e-6) & (a >= -1e-6); |
74 |
|
} |
75 |
|
|
76 |
< |
/* returns the name of the given tag */ |
94 |
< |
#ifdef ezxml_name |
95 |
< |
#undef ezxml_name |
96 |
< |
static char * |
97 |
< |
ezxml_name(ezxml_t xml) |
98 |
< |
{ |
99 |
< |
if (xml == NULL) |
100 |
< |
return NULL; |
101 |
< |
return xml->name; |
102 |
< |
} |
103 |
< |
#endif |
104 |
< |
|
105 |
< |
/* returns the given tag's character content or empty string if none */ |
76 |
> |
/* Returns the given tag's character content or empty string if none */ |
77 |
|
#ifdef ezxml_txt |
78 |
|
#undef ezxml_txt |
79 |
|
static char * |
132 |
|
/* Free a BSDF matrix */ |
133 |
|
#define SDfreeMatrix free |
134 |
|
|
135 |
< |
/* get vector for this angle basis index */ |
136 |
< |
static int |
137 |
< |
ab_getvec(FVECT v, int ndx, double randX, void *p) |
135 |
> |
/* Get vector for this angle basis index (front exiting) */ |
136 |
> |
int |
137 |
> |
fo_getvec(FVECT v, double ndxr, void *p) |
138 |
|
{ |
139 |
< |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
139 |
> |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
140 |
> |
int ndx = (int)ndxr; |
141 |
> |
double randX = ndxr - ndx; |
142 |
|
double rx[2]; |
143 |
|
int li; |
144 |
|
double pol, azi, d; |
145 |
|
|
146 |
< |
if ((ndx < 0) | (ndx >= ab->nangles)) |
146 |
> |
if ((ndxr < 0) | (ndx >= ab->nangles)) |
147 |
|
return RC_FAIL; |
148 |
|
for (li = 0; ndx >= ab->lat[li].nphis; li++) |
149 |
|
ndx -= ab->lat[li].nphis; |
158 |
|
return RC_GOOD; |
159 |
|
} |
160 |
|
|
161 |
< |
/* get index corresponding to the given vector */ |
162 |
< |
static int |
163 |
< |
ab_getndx(const FVECT v, void *p) |
161 |
> |
/* Get index corresponding to the given vector (front exiting) */ |
162 |
> |
int |
163 |
> |
fo_getndx(const FVECT v, void *p) |
164 |
|
{ |
165 |
< |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
165 |
> |
ANGLE_BASIS *ab = (ANGLE_BASIS *)p; |
166 |
|
int li, ndx; |
167 |
< |
double pol, azi, d; |
167 |
> |
double pol, azi; |
168 |
|
|
169 |
|
if (v == NULL) |
170 |
|
return -1; |
171 |
< |
if ((v[2] < .0) | (v[2] > 1.0)) |
171 |
> |
if ((v[2] < 0) | (v[2] > 1.)) |
172 |
|
return -1; |
173 |
|
pol = 180.0/M_PI*acos(v[2]); |
174 |
|
azi = 180.0/M_PI*atan2(v[1], v[0]); |
187 |
|
/* compute square of real value */ |
188 |
|
static double sq(double x) { return x*x; } |
189 |
|
|
190 |
< |
/* get projected solid angle for this angle basis index */ |
191 |
< |
static double |
192 |
< |
ab_getohm(int ndx, void *p) |
190 |
> |
/* Get projected solid angle for this angle basis index (universal) */ |
191 |
> |
double |
192 |
> |
io_getohm(int ndx, void *p) |
193 |
|
{ |
194 |
|
static int last_li = -1; |
195 |
|
static double last_ohm; |
204 |
|
if (li == last_li) /* cached latitude? */ |
205 |
|
return last_ohm; |
206 |
|
last_li = li; |
234 |
– |
theta1 = M_PI/180. * ab->lat[li+1].tmin; |
235 |
– |
if (ab->lat[li].nphis == 1) /* special case */ |
236 |
– |
return last_ohm = M_PI*(1. - sq(cos(theta1))); |
207 |
|
theta = M_PI/180. * ab->lat[li].tmin; |
208 |
+ |
theta1 = M_PI/180. * ab->lat[li+1].tmin; |
209 |
|
return last_ohm = M_PI*(sq(cos(theta)) - sq(cos(theta1))) / |
210 |
|
(double)ab->lat[li].nphis; |
211 |
|
} |
212 |
|
|
213 |
< |
/* get reverse vector for this angle basis index */ |
214 |
< |
static int |
215 |
< |
ab_getvecR(FVECT v, int ndx, double randX, void *p) |
213 |
> |
/* Get vector for this angle basis index (back incident) */ |
214 |
> |
int |
215 |
> |
bi_getvec(FVECT v, double ndxr, void *p) |
216 |
|
{ |
217 |
< |
int na = (*(ANGLE_BASIS *)p).nangles; |
247 |
< |
|
248 |
< |
if (!ab_getvec(v, ndx, randX, p)) |
217 |
> |
if (!fo_getvec(v, ndxr, p)) |
218 |
|
return RC_FAIL; |
219 |
|
|
220 |
|
v[0] = -v[0]; |
224 |
|
return RC_GOOD; |
225 |
|
} |
226 |
|
|
227 |
< |
/* get index corresponding to the reverse vector */ |
228 |
< |
static int |
229 |
< |
ab_getndxR(const FVECT v, void *p) |
227 |
> |
/* Get index corresponding to the vector (back incident) */ |
228 |
> |
int |
229 |
> |
bi_getndx(const FVECT v, void *p) |
230 |
|
{ |
231 |
|
FVECT v2; |
232 |
|
|
234 |
|
v2[1] = -v[1]; |
235 |
|
v2[2] = -v[2]; |
236 |
|
|
237 |
< |
return ab_getndx(v2, p); |
237 |
> |
return fo_getndx(v2, p); |
238 |
|
} |
239 |
|
|
240 |
+ |
/* Get vector for this angle basis index (back exiting) */ |
241 |
+ |
int |
242 |
+ |
bo_getvec(FVECT v, double ndxr, void *p) |
243 |
+ |
{ |
244 |
+ |
if (!fo_getvec(v, ndxr, p)) |
245 |
+ |
return RC_FAIL; |
246 |
+ |
|
247 |
+ |
v[2] = -v[2]; |
248 |
+ |
|
249 |
+ |
return RC_GOOD; |
250 |
+ |
} |
251 |
+ |
|
252 |
+ |
/* Get index corresponding to the vector (back exiting) */ |
253 |
+ |
int |
254 |
+ |
bo_getndx(const FVECT v, void *p) |
255 |
+ |
{ |
256 |
+ |
FVECT v2; |
257 |
+ |
|
258 |
+ |
v2[0] = v[0]; |
259 |
+ |
v2[1] = v[1]; |
260 |
+ |
v2[2] = -v[2]; |
261 |
+ |
|
262 |
+ |
return fo_getndx(v2, p); |
263 |
+ |
} |
264 |
+ |
|
265 |
+ |
/* Get vector for this angle basis index (front incident) */ |
266 |
+ |
int |
267 |
+ |
fi_getvec(FVECT v, double ndxr, void *p) |
268 |
+ |
{ |
269 |
+ |
if (!fo_getvec(v, ndxr, p)) |
270 |
+ |
return RC_FAIL; |
271 |
+ |
|
272 |
+ |
v[0] = -v[0]; |
273 |
+ |
v[1] = -v[1]; |
274 |
+ |
|
275 |
+ |
return RC_GOOD; |
276 |
+ |
} |
277 |
+ |
|
278 |
+ |
/* Get index corresponding to the vector (front incident) */ |
279 |
+ |
int |
280 |
+ |
fi_getndx(const FVECT v, void *p) |
281 |
+ |
{ |
282 |
+ |
FVECT v2; |
283 |
+ |
|
284 |
+ |
v2[0] = -v[0]; |
285 |
+ |
v2[1] = -v[1]; |
286 |
+ |
v2[2] = v[2]; |
287 |
+ |
|
288 |
+ |
return fo_getndx(v2, p); |
289 |
+ |
} |
290 |
+ |
|
291 |
|
/* load custom BSDF angle basis */ |
292 |
|
static int |
293 |
|
load_angle_basis(ezxml_t wab) |
319 |
|
ezxml_child(ezxml_child(wbb, |
320 |
|
"ThetaBounds"), "UpperTheta"))); |
321 |
|
if (!i) |
322 |
< |
abase_list[nabases].lat[i].tmin = |
303 |
< |
-abase_list[nabases].lat[i+1].tmin; |
322 |
> |
abase_list[nabases].lat[0].tmin = 0; |
323 |
|
else if (!fequal(atof(ezxml_txt(ezxml_child(ezxml_child(wbb, |
324 |
|
"ThetaBounds"), "LowerTheta"))), |
325 |
|
abase_list[nabases].lat[i].tmin)) { |
326 |
|
sprintf(SDerrorDetail, "Theta values disagree in '%s'", |
327 |
< |
abname); |
327 |
> |
abname); |
328 |
|
return RC_DATERR; |
329 |
|
} |
330 |
|
abase_list[nabases].nangles += |
334 |
|
(abase_list[nabases].lat[i].nphis == 1 && |
335 |
|
abase_list[nabases].lat[i].tmin > FTINY)) { |
336 |
|
sprintf(SDerrorDetail, "Illegal phi count in '%s'", |
337 |
< |
abname); |
337 |
> |
abname); |
338 |
|
return RC_DATERR; |
339 |
|
} |
340 |
|
} |
369 |
|
} |
370 |
|
free(ohma); |
371 |
|
/* need incoming solid angles, too? */ |
372 |
< |
if (dp->ninc < dp->nout || dp->ib_ohm != dp->ob_ohm || |
354 |
< |
dp->ib_priv != dp->ob_priv) { |
372 |
> |
if ((dp->ib_ohm != dp->ob_ohm) | (dp->ib_priv != dp->ob_priv)) { |
373 |
|
double ohm; |
374 |
|
for (i = dp->ninc; i--; ) |
375 |
|
if ((ohm = mBSDF_incohm(dp,i)) < df->minProjSA) |
382 |
|
static int |
383 |
|
load_bsdf_data(SDData *sd, ezxml_t wdb, int rowinc) |
384 |
|
{ |
367 |
– |
char *cbasis = ezxml_txt(ezxml_child(wdb,"ColumnAngleBasis")); |
368 |
– |
char *rbasis = ezxml_txt(ezxml_child(wdb,"RowAngleBasis")); |
385 |
|
SDSpectralDF *df; |
386 |
|
SDMat *dp; |
387 |
|
char *sdata; |
388 |
|
int inbi, outbi; |
389 |
|
int i; |
374 |
– |
|
375 |
– |
if ((!cbasis || !*cbasis) | (!rbasis || !*rbasis)) { |
376 |
– |
sprintf(SDerrorDetail, "Missing column/row basis for BSDF '%s'", |
377 |
– |
sd->name); |
378 |
– |
return RC_FORMERR; |
379 |
– |
} |
390 |
|
/* allocate BSDF component */ |
391 |
|
sdata = ezxml_txt(ezxml_child(wdb, "WavelengthDataDirection")); |
392 |
+ |
if (!sdata) |
393 |
+ |
return RC_FAIL; |
394 |
+ |
/* |
395 |
+ |
* Remember that front and back are reversed from WINDOW 6 orientations |
396 |
+ |
*/ |
397 |
|
if (!strcasecmp(sdata, "Transmission Front")) { |
398 |
+ |
if (sd->tb != NULL) |
399 |
+ |
SDfreeSpectralDF(sd->tb); |
400 |
+ |
if ((sd->tb = SDnewSpectralDF(1)) == NULL) |
401 |
+ |
return RC_MEMERR; |
402 |
+ |
df = sd->tb; |
403 |
+ |
} else if (!strcasecmp(sdata, "Transmission Back")) { |
404 |
|
if (sd->tf != NULL) |
405 |
|
SDfreeSpectralDF(sd->tf); |
406 |
|
if ((sd->tf = SDnewSpectralDF(1)) == NULL) |
407 |
|
return RC_MEMERR; |
408 |
|
df = sd->tf; |
409 |
|
} else if (!strcasecmp(sdata, "Reflection Front")) { |
389 |
– |
if (sd->rf != NULL) |
390 |
– |
SDfreeSpectralDF(sd->rf); |
391 |
– |
if ((sd->rf = SDnewSpectralDF(1)) == NULL) |
392 |
– |
return RC_MEMERR; |
393 |
– |
df = sd->rf; |
394 |
– |
} else if (!strcasecmp(sdata, "Reflection Back")) { |
410 |
|
if (sd->rb != NULL) |
411 |
|
SDfreeSpectralDF(sd->rb); |
412 |
|
if ((sd->rb = SDnewSpectralDF(1)) == NULL) |
413 |
|
return RC_MEMERR; |
414 |
|
df = sd->rb; |
415 |
+ |
} else if (!strcasecmp(sdata, "Reflection Back")) { |
416 |
+ |
if (sd->rf != NULL) |
417 |
+ |
SDfreeSpectralDF(sd->rf); |
418 |
+ |
if ((sd->rf = SDnewSpectralDF(1)) == NULL) |
419 |
+ |
return RC_MEMERR; |
420 |
+ |
df = sd->rf; |
421 |
|
} else |
422 |
|
return RC_FAIL; |
423 |
+ |
/* XXX should also check "ScatteringDataType" for consistency? */ |
424 |
|
/* get angle bases */ |
425 |
|
sdata = ezxml_txt(ezxml_child(wdb,"ColumnAngleBasis")); |
426 |
|
if (!sdata || !*sdata) { |
429 |
|
return RC_FORMERR; |
430 |
|
} |
431 |
|
for (inbi = nabases; inbi--; ) |
432 |
< |
if (!strcasecmp(cbasis, abase_list[inbi].name)) |
432 |
> |
if (!strcasecmp(sdata, abase_list[inbi].name)) |
433 |
|
break; |
434 |
|
if (inbi < 0) { |
435 |
< |
sprintf(SDerrorDetail, "Undefined ColumnAngleBasis '%s'", |
414 |
< |
cbasis); |
435 |
> |
sprintf(SDerrorDetail, "Undefined ColumnAngleBasis '%s'", sdata); |
436 |
|
return RC_FORMERR; |
437 |
|
} |
438 |
|
sdata = ezxml_txt(ezxml_child(wdb,"RowAngleBasis")); |
442 |
|
return RC_FORMERR; |
443 |
|
} |
444 |
|
for (outbi = nabases; outbi--; ) |
445 |
< |
if (!strcasecmp(rbasis, abase_list[outbi].name)) |
445 |
> |
if (!strcasecmp(sdata, abase_list[outbi].name)) |
446 |
|
break; |
447 |
|
if (outbi < 0) { |
448 |
< |
sprintf(SDerrorDetail, "Undefined RowAngleBasis '%s'", cbasis); |
448 |
> |
sprintf(SDerrorDetail, "Undefined RowAngleBasis '%s'", sdata); |
449 |
|
return RC_FORMERR; |
450 |
|
} |
451 |
|
/* allocate BSDF matrix */ |
452 |
|
dp = SDnewMatrix(abase_list[inbi].nangles, abase_list[outbi].nangles); |
453 |
|
if (dp == NULL) |
454 |
|
return RC_MEMERR; |
455 |
< |
dp->ib_priv = (void *)&abase_list[inbi]; |
456 |
< |
dp->ob_priv = (void *)&abase_list[outbi]; |
455 |
> |
dp->ib_priv = &abase_list[inbi]; |
456 |
> |
dp->ob_priv = &abase_list[outbi]; |
457 |
|
if (df == sd->tf) { |
458 |
< |
dp->ib_vec = ab_getvecR; |
459 |
< |
dp->ib_ndx = ab_getndxR; |
460 |
< |
dp->ob_vec = ab_getvec; |
461 |
< |
dp->ob_ndx = ab_getndx; |
458 |
> |
dp->ib_vec = &fi_getvec; |
459 |
> |
dp->ib_ndx = &fi_getndx; |
460 |
> |
dp->ob_vec = &bo_getvec; |
461 |
> |
dp->ob_ndx = &bo_getndx; |
462 |
> |
} else if (df == sd->tb) { |
463 |
> |
dp->ib_vec = &bi_getvec; |
464 |
> |
dp->ib_ndx = &bi_getndx; |
465 |
> |
dp->ob_vec = &fo_getvec; |
466 |
> |
dp->ob_ndx = &fo_getndx; |
467 |
|
} else if (df == sd->rf) { |
468 |
< |
dp->ib_vec = ab_getvec; |
469 |
< |
dp->ib_ndx = ab_getndx; |
470 |
< |
dp->ob_vec = ab_getvec; |
471 |
< |
dp->ob_ndx = ab_getndx; |
468 |
> |
dp->ib_vec = &fi_getvec; |
469 |
> |
dp->ib_ndx = &fi_getndx; |
470 |
> |
dp->ob_vec = &fo_getvec; |
471 |
> |
dp->ob_ndx = &fo_getndx; |
472 |
|
} else /* df == sd->rb */ { |
473 |
< |
dp->ib_vec = ab_getvecR; |
474 |
< |
dp->ib_ndx = ab_getndxR; |
475 |
< |
dp->ob_vec = ab_getvecR; |
476 |
< |
dp->ob_ndx = ab_getndxR; |
473 |
> |
dp->ib_vec = &bi_getvec; |
474 |
> |
dp->ib_ndx = &bi_getndx; |
475 |
> |
dp->ob_vec = &bo_getvec; |
476 |
> |
dp->ob_ndx = &bo_getndx; |
477 |
|
} |
478 |
< |
dp->ib_ohm = ab_getohm; |
479 |
< |
dp->ob_ohm = ab_getohm; |
478 |
> |
dp->ib_ohm = &io_getohm; |
479 |
> |
dp->ob_ohm = &io_getohm; |
480 |
|
df->comp[0].cspec[0] = c_dfcolor; /* XXX monochrome for now */ |
481 |
|
df->comp[0].dist = dp; |
482 |
|
df->comp[0].func = &SDhandleMtx; |
483 |
|
/* read BSDF data */ |
484 |
< |
sdata = ezxml_txt(ezxml_child(wdb,"ScatteringData")); |
484 |
> |
sdata = ezxml_txt(ezxml_child(wdb, "ScatteringData")); |
485 |
|
if (!sdata || !*sdata) { |
486 |
|
sprintf(SDerrorDetail, "Missing BSDF ScatteringData in '%s'", |
487 |
|
sd->name); |
495 |
|
sd->name); |
496 |
|
return RC_FORMERR; |
497 |
|
} |
498 |
< |
while (*sdnext && isspace(*sdnext)) |
498 |
> |
while (isspace(*sdnext)) |
499 |
|
sdnext++; |
500 |
|
if (*sdnext == ',') sdnext++; |
501 |
|
if (rowinc) { |
502 |
|
int r = i/dp->nout; |
503 |
< |
int c = i - c*dp->nout; |
503 |
> |
int c = i - r*dp->nout; |
504 |
|
mBSDF_value(dp,r,c) = atof(sdata); |
505 |
|
} else |
506 |
|
dp->bsdf[i] = atof(sdata); |
520 |
|
for (i = n; --i; ) |
521 |
|
if (sm->bsdf[i] < minv) |
522 |
|
minv = sm->bsdf[i]; |
523 |
+ |
|
524 |
+ |
if (minv <= FTINY) |
525 |
+ |
return .0; |
526 |
+ |
|
527 |
|
for (i = n; i--; ) |
528 |
|
sm->bsdf[i] -= minv; |
529 |
|
|
549 |
|
c_cmix(&dv->spec, dv->cieY, &dv->spec, ymin, &df->comp[n].cspec[0]); |
550 |
|
dv->cieY += ymin; |
551 |
|
} |
552 |
< |
df->maxHemi -= dv->cieY; /* correct minimum hemispherical */ |
553 |
< |
dv->spec.clock++; /* make sure everything is set */ |
552 |
> |
df->maxHemi -= dv->cieY; /* adjust maximum hemispherical */ |
553 |
> |
/* make sure everything is set */ |
554 |
|
c_ccvt(&dv->spec, C_CSXY+C_CSSPEC); |
555 |
|
} |
556 |
|
|
557 |
|
/* Load a BSDF matrix from an open XML file */ |
558 |
|
SDError |
559 |
< |
SDloadMtx(SDData *sd, ezxml_t fl) |
559 |
> |
SDloadMtx(SDData *sd, ezxml_t wtl) |
560 |
|
{ |
561 |
< |
ezxml_t wtl, wld, wdb; |
562 |
< |
int rowIn; |
563 |
< |
struct BSDF_data *dp; |
564 |
< |
char *txt; |
565 |
< |
int rval; |
566 |
< |
|
567 |
< |
if (strcmp(ezxml_name(fl), "WindowElement")) { |
561 |
> |
ezxml_t wld, wdb; |
562 |
> |
int rowIn; |
563 |
> |
char *txt; |
564 |
> |
int rval; |
565 |
> |
/* basic checks and data ordering */ |
566 |
> |
txt = ezxml_txt(ezxml_child(ezxml_child(wtl, |
567 |
> |
"DataDefinition"), "IncidentDataStructure")); |
568 |
> |
if (txt == NULL || !*txt) { |
569 |
|
sprintf(SDerrorDetail, |
570 |
< |
"BSDF \"%s\": top level node not 'WindowElement'", |
570 |
> |
"BSDF \"%s\": missing IncidentDataStructure", |
571 |
|
sd->name); |
572 |
|
return SDEformat; |
573 |
|
} |
543 |
– |
wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer"); |
544 |
– |
txt = ezxml_txt(ezxml_child(ezxml_child(wtl, |
545 |
– |
"DataDefinition"), "IncidentDataStructure")); |
574 |
|
if (!strcasecmp(txt, "Rows")) |
575 |
|
rowIn = 1; |
576 |
|
else if (!strcasecmp(txt, "Columns")) |
581 |
|
sd->name); |
582 |
|
return SDEsupport; |
583 |
|
} |
584 |
< |
/* get angle basis */ |
585 |
< |
rval = load_angle_basis(ezxml_child(ezxml_child(wtl, |
586 |
< |
"DataDefinition"), "AngleBasis")); |
587 |
< |
if (rval < 0) |
588 |
< |
goto err_return; |
589 |
< |
/* load BSDF components */ |
584 |
> |
/* get angle bases */ |
585 |
> |
for (wld = ezxml_child(ezxml_child(wtl, "DataDefinition"), "AngleBasis"); |
586 |
> |
wld != NULL; wld = wld->next) { |
587 |
> |
rval = load_angle_basis(wld); |
588 |
> |
if (rval < 0) |
589 |
> |
return convert_errcode(rval); |
590 |
> |
} |
591 |
> |
/* load BSDF components */ |
592 |
|
for (wld = ezxml_child(wtl, "WavelengthData"); |
593 |
|
wld != NULL; wld = wld->next) { |
594 |
|
if (strcasecmp(ezxml_txt(ezxml_child(wld,"Wavelength")), |
597 |
|
for (wdb = ezxml_child(wld, "WavelengthDataBlock"); |
598 |
|
wdb != NULL; wdb = wdb->next) |
599 |
|
if ((rval = load_bsdf_data(sd, wdb, rowIn)) < 0) |
600 |
< |
goto err_return; |
600 |
> |
return convert_errcode(rval); |
601 |
|
} |
602 |
< |
/* separate diffuse components */ |
602 |
> |
/* separate diffuse components */ |
603 |
|
extract_diffuse(&sd->rLambFront, sd->rf); |
604 |
|
extract_diffuse(&sd->rLambBack, sd->rb); |
605 |
< |
extract_diffuse(&sd->tLamb, sd->tf); |
606 |
< |
/* return success */ |
605 |
> |
if (sd->tf != NULL) |
606 |
> |
extract_diffuse(&sd->tLamb, sd->tf); |
607 |
> |
if (sd->tb != NULL) |
608 |
> |
extract_diffuse(&sd->tLamb, sd->tb); |
609 |
> |
/* return success */ |
610 |
|
return SDEnone; |
578 |
– |
err_return: /* jump here on failure */ |
579 |
– |
if (sd->rf != NULL) { |
580 |
– |
SDfreeSpectralDF(sd->rf); |
581 |
– |
sd->rf = NULL; |
582 |
– |
} |
583 |
– |
if (sd->rb != NULL) { |
584 |
– |
SDfreeSpectralDF(sd->rb); |
585 |
– |
sd->rb = NULL; |
586 |
– |
} |
587 |
– |
if (sd->tf != NULL) { |
588 |
– |
SDfreeSpectralDF(sd->tf); |
589 |
– |
sd->tf = NULL; |
590 |
– |
} |
591 |
– |
return convert_errcode(rval); |
611 |
|
} |
612 |
|
|
613 |
|
/* Get Matrix BSDF value */ |
614 |
|
static int |
615 |
|
SDgetMtxBSDF(float coef[SDmaxCh], const FVECT outVec, |
616 |
< |
const FVECT inVec, const void *dist) |
616 |
> |
const FVECT inVec, SDComponent *sdc) |
617 |
|
{ |
618 |
< |
const SDMat *dp = (const SDMat *)dist; |
618 |
> |
const SDMat *dp; |
619 |
|
int i_ndx, o_ndx; |
620 |
+ |
/* check arguments */ |
621 |
+ |
if ((coef == NULL) | (outVec == NULL) | (inVec == NULL) | (sdc == NULL) |
622 |
+ |
|| (dp = (SDMat *)sdc->dist) == NULL) |
623 |
+ |
return 0; |
624 |
|
/* get angle indices */ |
625 |
|
i_ndx = mBSDF_incndx(dp, inVec); |
626 |
|
o_ndx = mBSDF_outndx(dp, outVec); |
635 |
|
return 1; /* XXX monochrome for now */ |
636 |
|
} |
637 |
|
|
638 |
< |
/* Query solid angle for vector */ |
638 |
> |
/* Query solid angle for vector(s) */ |
639 |
|
static SDError |
640 |
< |
SDqueryMtxProjSA(double *psa, const FVECT vec, int qflags, const void *dist) |
640 |
> |
SDqueryMtxProjSA(double *psa, const FVECT v1, const RREAL *v2, |
641 |
> |
int qflags, SDComponent *sdc) |
642 |
|
{ |
643 |
< |
const SDMat *dp = (const SDMat *)dist; |
644 |
< |
|
645 |
< |
if (!(qflags & SDqueryInc+SDqueryOut)) |
643 |
> |
const SDMat *dp; |
644 |
> |
double inc_psa, out_psa; |
645 |
> |
/* check arguments */ |
646 |
> |
if ((psa == NULL) | (v1 == NULL) | (sdc == NULL) || |
647 |
> |
(dp = (SDMat *)sdc->dist) == NULL) |
648 |
|
return SDEargument; |
649 |
< |
if (qflags & SDqueryInc) { |
650 |
< |
double inc_psa = mBSDF_incohm(dp, mBSDF_incndx(dp, vec)); |
651 |
< |
if (inc_psa < .0) |
652 |
< |
return SDEinternal; |
653 |
< |
switch (qflags & SDqueryMin+SDqueryMax) { |
654 |
< |
case SDqueryMax: |
655 |
< |
if (inc_psa > psa[0]) |
656 |
< |
psa[0] = inc_psa; |
657 |
< |
break; |
658 |
< |
case SDqueryMin+SDqueryMax: |
659 |
< |
if (inc_psa > psa[1]) |
660 |
< |
psa[1] = inc_psa; |
661 |
< |
/* fall through */ |
636 |
< |
case SDqueryMin: |
637 |
< |
if (inc_psa < psa[0]) |
638 |
< |
psa[0] = inc_psa; |
639 |
< |
break; |
640 |
< |
case 0: |
649 |
> |
if (v2 == NULL) |
650 |
> |
v2 = v1; |
651 |
> |
/* get projected solid angles */ |
652 |
> |
out_psa = mBSDF_outohm(dp, mBSDF_outndx(dp, v1)); |
653 |
> |
inc_psa = mBSDF_incohm(dp, mBSDF_incndx(dp, v2)); |
654 |
> |
if ((v1 != v2) & (out_psa <= 0) & (inc_psa <= 0)) { |
655 |
> |
inc_psa = mBSDF_outohm(dp, mBSDF_outndx(dp, v2)); |
656 |
> |
out_psa = mBSDF_incohm(dp, mBSDF_incndx(dp, v1)); |
657 |
> |
} |
658 |
> |
|
659 |
> |
switch (qflags) { /* record based on flag settings */ |
660 |
> |
case SDqueryMax: |
661 |
> |
if (inc_psa > psa[0]) |
662 |
|
psa[0] = inc_psa; |
663 |
< |
break; |
664 |
< |
} |
663 |
> |
if (out_psa > psa[0]) |
664 |
> |
psa[0] = out_psa; |
665 |
> |
break; |
666 |
> |
case SDqueryMin+SDqueryMax: |
667 |
> |
if (inc_psa > psa[1]) |
668 |
> |
psa[1] = inc_psa; |
669 |
> |
if (out_psa > psa[1]) |
670 |
> |
psa[1] = out_psa; |
671 |
> |
/* fall through */ |
672 |
> |
case SDqueryVal: |
673 |
> |
if (qflags == SDqueryVal) |
674 |
> |
psa[0] = M_PI; |
675 |
> |
/* fall through */ |
676 |
> |
case SDqueryMin: |
677 |
> |
if ((inc_psa > 0) & (inc_psa < psa[0])) |
678 |
> |
psa[0] = inc_psa; |
679 |
> |
if ((out_psa > 0) & (out_psa < psa[0])) |
680 |
> |
psa[0] = out_psa; |
681 |
> |
break; |
682 |
|
} |
683 |
< |
if (qflags & SDqueryOut) { |
684 |
< |
double out_psa = mBSDF_outohm(dp, mBSDF_outndx(dp, vec)); |
647 |
< |
if (out_psa < .0) |
648 |
< |
return SDEinternal; |
649 |
< |
switch (qflags & SDqueryMin+SDqueryMax) { |
650 |
< |
case SDqueryMax: |
651 |
< |
if (out_psa > psa[0]) |
652 |
< |
psa[0] = out_psa; |
653 |
< |
break; |
654 |
< |
case SDqueryMin+SDqueryMax: |
655 |
< |
if (out_psa > psa[1]) |
656 |
< |
psa[1] = out_psa; |
657 |
< |
/* fall through */ |
658 |
< |
case SDqueryMin: |
659 |
< |
if (out_psa < psa[0]) |
660 |
< |
psa[0] = out_psa; |
661 |
< |
break; |
662 |
< |
case 0: |
663 |
< |
psa[(qflags&SDqueryInc)!=0] = out_psa; |
664 |
< |
break; |
665 |
< |
} |
666 |
< |
} |
667 |
< |
return SDEnone; |
683 |
> |
/* make sure it's legal */ |
684 |
> |
return (psa[0] <= 0) ? SDEinternal : SDEnone; |
685 |
|
} |
686 |
|
|
687 |
|
/* Compute new cumulative distribution from BSDF */ |
719 |
|
static const SDCDst * |
720 |
|
SDgetMtxCDist(const FVECT inVec, SDComponent *sdc) |
721 |
|
{ |
722 |
< |
SDMat *dp = (SDMat *)sdc->dist; |
722 |
> |
SDMat *dp; |
723 |
|
int reverse; |
724 |
|
SDMatCDst myCD; |
725 |
|
SDMatCDst *cd, *cdlast; |
726 |
< |
|
727 |
< |
if (dp == NULL) |
726 |
> |
/* check arguments */ |
727 |
> |
if ((inVec == NULL) | (sdc == NULL) || |
728 |
> |
(dp = (SDMat *)sdc->dist) == NULL) |
729 |
|
return NULL; |
730 |
|
memset(&myCD, 0, sizeof(myCD)); |
731 |
|
myCD.indx = mBSDF_incndx(dp, inVec); |
744 |
|
reverse = 1; |
745 |
|
} |
746 |
|
cdlast = NULL; /* check for it in cache list */ |
747 |
< |
for (cd = (SDMatCDst *)sdc->cdList; |
748 |
< |
cd != NULL; cd = (SDMatCDst *)cd->next) { |
747 |
> |
for (cd = (SDMatCDst *)sdc->cdList; cd != NULL; |
748 |
> |
cdlast = cd, cd = cd->next) |
749 |
|
if (cd->indx == myCD.indx && (cd->calen == myCD.calen) & |
750 |
|
(cd->ob_priv == myCD.ob_priv) & |
751 |
|
(cd->ob_vec == myCD.ob_vec)) |
752 |
|
break; |
735 |
– |
cdlast = cd; |
736 |
– |
} |
753 |
|
if (cd == NULL) { /* need to allocate new entry */ |
754 |
|
cd = (SDMatCDst *)malloc(sizeof(SDMatCDst) + |
755 |
< |
myCD.calen*sizeof(myCD.carr[0])); |
755 |
> |
sizeof(myCD.carr[0])*myCD.calen); |
756 |
|
if (cd == NULL) |
757 |
|
return NULL; |
758 |
|
*cd = myCD; /* compute cumulative distribution */ |
764 |
|
} |
765 |
|
if (cdlast != NULL) { /* move entry to head of cache list */ |
766 |
|
cdlast->next = cd->next; |
767 |
< |
cd->next = sdc->cdList; |
767 |
> |
cd->next = (SDMatCDst *)sdc->cdList; |
768 |
|
sdc->cdList = (SDCDst *)cd; |
769 |
|
} |
770 |
|
return (SDCDst *)cd; /* ready to go */ |
772 |
|
|
773 |
|
/* Sample cumulative distribution */ |
774 |
|
static SDError |
775 |
< |
SDsampMtxCDist(FVECT outVec, double randX, const SDCDst *cdp) |
775 |
> |
SDsampMtxCDist(FVECT ioVec, double randX, const SDCDst *cdp) |
776 |
|
{ |
777 |
|
const unsigned maxval = ~0; |
778 |
|
const SDMatCDst *mcd = (const SDMatCDst *)cdp; |
779 |
|
const unsigned target = randX*maxval; |
780 |
|
int i, iupper, ilower; |
781 |
+ |
/* check arguments */ |
782 |
+ |
if ((ioVec == NULL) | (mcd == NULL)) |
783 |
+ |
return SDEargument; |
784 |
|
/* binary search to find index */ |
785 |
|
ilower = 0; iupper = mcd->calen; |
786 |
|
while ((i = (iupper + ilower) >> 1) != ilower) |
787 |
< |
if ((long)target >= (long)mcd->carr[i]) |
787 |
> |
if (target >= mcd->carr[i]) |
788 |
|
ilower = i; |
789 |
|
else |
790 |
|
iupper = i; |
792 |
|
randX = (randX*maxval - mcd->carr[ilower]) / |
793 |
|
(double)(mcd->carr[iupper] - mcd->carr[ilower]); |
794 |
|
/* convert index to vector */ |
795 |
< |
if ((*mcd->ob_vec)(outVec, i, randX, mcd->ob_priv)) |
795 |
> |
if ((*mcd->ob_vec)(ioVec, i+randX, mcd->ob_priv)) |
796 |
|
return SDEnone; |
797 |
< |
strcpy(SDerrorDetail, "BSDF sampling fault"); |
797 |
> |
strcpy(SDerrorDetail, "Matrix BSDF sampling fault"); |
798 |
|
return SDEinternal; |
799 |
|
} |
800 |
|
|