1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: bsdf2klems.c,v 2.35 2023/07/26 15:50:03 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Load measured BSDF interpolant and write out as XML file with Klems matrix. |
6 |
* |
7 |
* G. Ward |
8 |
*/ |
9 |
|
10 |
#define _USE_MATH_DEFINES |
11 |
#include <stdlib.h> |
12 |
#include <math.h> |
13 |
#include <ctype.h> |
14 |
#include "random.h" |
15 |
#include "platform.h" |
16 |
#include "paths.h" |
17 |
#include "rtio.h" |
18 |
#include "calcomp.h" |
19 |
#include "bsdfrep.h" |
20 |
#include "bsdf_m.h" |
21 |
/* tristimulus components */ |
22 |
enum {CIE_X, CIE_Y, CIE_Z}; |
23 |
/* assumed maximum # Klems patches */ |
24 |
#define MAXPATCHES 145 |
25 |
/* global argv[0] */ |
26 |
char *progname; |
27 |
/* selected basis function name */ |
28 |
static const char klems_full[] = "LBNL/Klems Full"; |
29 |
static const char klems_half[] = "LBNL/Klems Half"; |
30 |
static const char klems_quarter[] = "LBNL/Klems Quarter"; |
31 |
static const char *kbasis = klems_full; |
32 |
/* number of BSDF samples per patch */ |
33 |
static int npsamps = 1024; |
34 |
/* limit on number of RBF lobes */ |
35 |
static int lobe_lim = 15000; |
36 |
/* progress bar length */ |
37 |
static int do_prog = 79; |
38 |
|
39 |
#define MAXCARG 512 /* wrapBSDF command */ |
40 |
static char *wrapBSDF[MAXCARG] = {"wrapBSDF", "-W", "-UU"}; |
41 |
static int wbsdfac = 3; |
42 |
|
43 |
/* Add argument to wrapBSDF, allocating space if !isstatic */ |
44 |
static void |
45 |
add_wbsdf(const char *arg, int isstatic) |
46 |
{ |
47 |
if (arg == NULL) |
48 |
return; |
49 |
if (wbsdfac >= MAXCARG-1) { |
50 |
fputs(progname, stderr); |
51 |
fputs(": too many command arguments to wrapBSDF\n", stderr); |
52 |
exit(1); |
53 |
} |
54 |
if (!*arg) |
55 |
arg = ""; |
56 |
else if (!isstatic) |
57 |
arg = savqstr((char *)arg); |
58 |
|
59 |
wrapBSDF[wbsdfac++] = (char *)arg; |
60 |
} |
61 |
|
62 |
/* Start new progress bar */ |
63 |
#define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else |
64 |
|
65 |
/* Draw progress bar of the appropriate length */ |
66 |
static void |
67 |
prog_show(double frac) |
68 |
{ |
69 |
static unsigned call_cnt = 0; |
70 |
static char lastc[] = "-\\|/"; |
71 |
char pbar[256]; |
72 |
int nchars; |
73 |
|
74 |
if (do_prog <= 1) return; |
75 |
if (do_prog > sizeof(pbar)-2) |
76 |
do_prog = sizeof(pbar)-2; |
77 |
if (frac < 0) frac = 0; |
78 |
else if (frac >= 1) frac = .9999; |
79 |
nchars = do_prog*frac; |
80 |
pbar[0] = '\r'; |
81 |
memset(pbar+1, '*', nchars); |
82 |
pbar[nchars+1] = lastc[call_cnt++ & 3]; |
83 |
memset(pbar+2+nchars, '-', do_prog-nchars-1); |
84 |
pbar[do_prog+1] = '\0'; |
85 |
fputs(pbar, stderr); |
86 |
} |
87 |
|
88 |
/* Finish progress bar */ |
89 |
static void |
90 |
prog_done(void) |
91 |
{ |
92 |
int n = do_prog; |
93 |
|
94 |
if (n <= 1) return; |
95 |
fputc('\r', stderr); |
96 |
while (n--) |
97 |
fputc(' ', stderr); |
98 |
fputc('\r', stderr); |
99 |
} |
100 |
|
101 |
/* Return angle basis corresponding to the given name */ |
102 |
static ANGLE_BASIS * |
103 |
get_basis(const char *bn) |
104 |
{ |
105 |
int n = nabases; |
106 |
|
107 |
while (n-- > 0) |
108 |
if (!strcasecmp(bn, abase_list[n].name)) |
109 |
return &abase_list[n]; |
110 |
return NULL; |
111 |
} |
112 |
|
113 |
/* Copy geometry string to file for wrapBSDF */ |
114 |
static char * |
115 |
save_geom(const char *mgf) |
116 |
{ |
117 |
char *tfname = mktemp(savqstr(TEMPLATE)); |
118 |
int fd = open(tfname, O_CREAT|O_WRONLY, 0600); |
119 |
|
120 |
if (fd < 0) |
121 |
return(NULL); |
122 |
write(fd, mgf, strlen(mgf)); |
123 |
close(fd); |
124 |
add_wbsdf("-g", 1); |
125 |
add_wbsdf(tfname, 1); |
126 |
return(tfname); |
127 |
} |
128 |
|
129 |
/* Open XYZ component file for output and add appropriate arguments */ |
130 |
static FILE * |
131 |
open_component_file(int c) |
132 |
{ |
133 |
static const char sname[3][6] = {"CIE-X", "CIE-Y", "CIE-Z"}; |
134 |
static const char cname[4][4] = {"-rf", "-tf", "-tb", "-rb"}; |
135 |
char *tfname = mktemp(savqstr(TEMPLATE)); |
136 |
FILE *fp = fopen(tfname, "w"); |
137 |
|
138 |
if (fp == NULL) { |
139 |
fprintf(stderr, "%s: cannot open '%s' for writing\n", |
140 |
progname, tfname); |
141 |
exit(1); |
142 |
} |
143 |
add_wbsdf("-s", 1); add_wbsdf(sname[c], 1); |
144 |
add_wbsdf(cname[(input_orient>0)<<1 | (output_orient>0)], 1); |
145 |
add_wbsdf(tfname, 1); |
146 |
return(fp); |
147 |
} |
148 |
|
149 |
/* Load and resample XML BSDF description using Klems basis */ |
150 |
static void |
151 |
eval_bsdf(const char *fname) |
152 |
{ |
153 |
ANGLE_BASIS *abp = get_basis(kbasis); |
154 |
FILE *cfp[3]; |
155 |
SDData bsd; |
156 |
SDError ec; |
157 |
FVECT vin, vout; |
158 |
SDValue sdv; |
159 |
double sum, xsum, ysum; |
160 |
int i, j, n; |
161 |
|
162 |
initurand(npsamps); |
163 |
SDclearBSDF(&bsd, fname); /* load BSDF file */ |
164 |
if ((ec = SDloadFile(&bsd, fname)) != SDEnone) |
165 |
goto err; |
166 |
if (bsd.mgf != NULL) /* save geometry */ |
167 |
save_geom(bsd.mgf); |
168 |
if (bsd.matn[0]) /* save identifier(s) */ |
169 |
strcpy(bsdf_name, bsd.matn); |
170 |
if (bsd.makr[0]) |
171 |
strcpy(bsdf_manuf, bsd.makr); |
172 |
if (bsd.dim[2] > 0) { /* save dimension(s) */ |
173 |
char buf[64]; |
174 |
if ((bsd.dim[0] > 0) & (bsd.dim[1] > 0)) |
175 |
sprintf(buf, "w=%g;h=%g;t=%g", |
176 |
bsd.dim[0], bsd.dim[1], bsd.dim[2]); |
177 |
else |
178 |
sprintf(buf, "t=%g", bsd.dim[2]); |
179 |
add_wbsdf("-f", 1); |
180 |
add_wbsdf(buf, 0); |
181 |
} |
182 |
/* front reflection */ |
183 |
if (bsd.rf != NULL || bsd.rLambFront.cieY > .002) { |
184 |
input_orient = 1; output_orient = 1; |
185 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
186 |
if (bsd.rf != NULL && bsd.rf->comp[0].cspec[2].flags) { |
187 |
rbf_colorimetry = RBCtristimulus; |
188 |
cfp[CIE_X] = open_component_file(CIE_X); |
189 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
190 |
} else |
191 |
rbf_colorimetry = RBCphotopic; |
192 |
for (j = 0; j < abp->nangles; j++) { |
193 |
for (i = 0; i < abp->nangles; i++) { |
194 |
sum = 0; /* average over patches */ |
195 |
xsum = ysum = 0; |
196 |
for (n = npsamps; n-- > 0; ) { |
197 |
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
198 |
fi_getvec(vin, i+urand(n), abp); |
199 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
200 |
if (ec != SDEnone) |
201 |
goto err; |
202 |
sum += sdv.cieY; |
203 |
if (rbf_colorimetry == RBCtristimulus) { |
204 |
xsum += sdv.cieY * sdv.spec.cx; |
205 |
ysum += sdv.cieY * sdv.spec.cy; |
206 |
} |
207 |
} |
208 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
209 |
if (rbf_colorimetry == RBCtristimulus) { |
210 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
211 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
212 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
213 |
} |
214 |
} |
215 |
fputc('\n', cfp[CIE_Y]); /* extra space between rows */ |
216 |
if (rbf_colorimetry == RBCtristimulus) { |
217 |
fputc('\n', cfp[CIE_X]); |
218 |
fputc('\n', cfp[CIE_Z]); |
219 |
} |
220 |
} |
221 |
if (fclose(cfp[CIE_Y])) { |
222 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
223 |
exit(1); |
224 |
} |
225 |
if (rbf_colorimetry == RBCtristimulus && |
226 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
227 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
228 |
exit(1); |
229 |
} |
230 |
} |
231 |
/* back reflection */ |
232 |
if (bsd.rb != NULL || bsd.rLambBack.cieY > .002) { |
233 |
input_orient = -1; output_orient = -1; |
234 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
235 |
if (bsd.rb != NULL && bsd.rb->comp[0].cspec[2].flags) { |
236 |
rbf_colorimetry = RBCtristimulus; |
237 |
cfp[CIE_X] = open_component_file(CIE_X); |
238 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
239 |
} else |
240 |
rbf_colorimetry = RBCphotopic; |
241 |
for (j = 0; j < abp->nangles; j++) { |
242 |
for (i = 0; i < abp->nangles; i++) { |
243 |
sum = 0; /* average over patches */ |
244 |
xsum = ysum = 0; |
245 |
for (n = npsamps; n-- > 0; ) { |
246 |
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
247 |
bi_getvec(vin, i+urand(n), abp); |
248 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
249 |
if (ec != SDEnone) |
250 |
goto err; |
251 |
sum += sdv.cieY; |
252 |
if (rbf_colorimetry == RBCtristimulus) { |
253 |
xsum += sdv.cieY * sdv.spec.cx; |
254 |
ysum += sdv.cieY * sdv.spec.cy; |
255 |
} |
256 |
} |
257 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
258 |
if (rbf_colorimetry == RBCtristimulus) { |
259 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
260 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
261 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
262 |
} |
263 |
} |
264 |
if (rbf_colorimetry == RBCtristimulus) { |
265 |
fputc('\n', cfp[CIE_X]); |
266 |
fputc('\n', cfp[CIE_Z]); |
267 |
} |
268 |
} |
269 |
if (fclose(cfp[CIE_Y])) { |
270 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
271 |
exit(1); |
272 |
} |
273 |
if (rbf_colorimetry == RBCtristimulus && |
274 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
275 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
276 |
exit(1); |
277 |
} |
278 |
} |
279 |
/* front transmission */ |
280 |
if (bsd.tf != NULL || bsd.tLambFront.cieY > .002) { |
281 |
input_orient = 1; output_orient = -1; |
282 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
283 |
if (bsd.tf != NULL && bsd.tf->comp[0].cspec[2].flags) { |
284 |
rbf_colorimetry = RBCtristimulus; |
285 |
cfp[CIE_X] = open_component_file(CIE_X); |
286 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
287 |
} else |
288 |
rbf_colorimetry = RBCphotopic; |
289 |
for (j = 0; j < abp->nangles; j++) { |
290 |
for (i = 0; i < abp->nangles; i++) { |
291 |
sum = 0; /* average over patches */ |
292 |
xsum = ysum = 0; |
293 |
for (n = npsamps; n-- > 0; ) { |
294 |
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
295 |
fi_getvec(vin, i+urand(n), abp); |
296 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
297 |
if (ec != SDEnone) |
298 |
goto err; |
299 |
sum += sdv.cieY; |
300 |
if (rbf_colorimetry == RBCtristimulus) { |
301 |
xsum += sdv.cieY * sdv.spec.cx; |
302 |
ysum += sdv.cieY * sdv.spec.cy; |
303 |
} |
304 |
} |
305 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
306 |
if (rbf_colorimetry == RBCtristimulus) { |
307 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
308 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
309 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
310 |
} |
311 |
} |
312 |
if (rbf_colorimetry == RBCtristimulus) { |
313 |
fputc('\n', cfp[CIE_X]); |
314 |
fputc('\n', cfp[CIE_Z]); |
315 |
} |
316 |
} |
317 |
if (fclose(cfp[CIE_Y])) { |
318 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
319 |
exit(1); |
320 |
} |
321 |
if (rbf_colorimetry == RBCtristimulus && |
322 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
323 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
324 |
exit(1); |
325 |
} |
326 |
} |
327 |
/* back transmission */ |
328 |
if ((bsd.tb != NULL) | (bsd.tf != NULL)) { |
329 |
input_orient = -1; output_orient = 1; |
330 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
331 |
if (bsd.tb != NULL) |
332 |
rbf_colorimetry = bsd.tb->comp[0].cspec[2].flags |
333 |
? RBCtristimulus : RBCphotopic ; |
334 |
if (rbf_colorimetry == RBCtristimulus) { |
335 |
cfp[CIE_X] = open_component_file(CIE_X); |
336 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
337 |
} |
338 |
for (j = 0; j < abp->nangles; j++) { |
339 |
for (i = 0; i < abp->nangles; i++) { |
340 |
sum = 0; /* average over patches */ |
341 |
xsum = ysum = 0; |
342 |
for (n = npsamps; n-- > 0; ) { |
343 |
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
344 |
bi_getvec(vin, i+urand(n), abp); |
345 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
346 |
if (ec != SDEnone) |
347 |
goto err; |
348 |
sum += sdv.cieY; |
349 |
if (rbf_colorimetry == RBCtristimulus) { |
350 |
xsum += sdv.cieY * sdv.spec.cx; |
351 |
ysum += sdv.cieY * sdv.spec.cy; |
352 |
} |
353 |
} |
354 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
355 |
if (rbf_colorimetry == RBCtristimulus) { |
356 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
357 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
358 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
359 |
} |
360 |
} |
361 |
if (rbf_colorimetry == RBCtristimulus) { |
362 |
fputc('\n', cfp[CIE_X]); |
363 |
fputc('\n', cfp[CIE_Z]); |
364 |
} |
365 |
} |
366 |
if (fclose(cfp[CIE_Y])) { |
367 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
368 |
exit(1); |
369 |
} |
370 |
if (rbf_colorimetry == RBCtristimulus && |
371 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
372 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
373 |
exit(1); |
374 |
} |
375 |
} |
376 |
SDfreeBSDF(&bsd); /* all done */ |
377 |
return; |
378 |
err: |
379 |
SDreportError(ec, stderr); |
380 |
exit(1); |
381 |
} |
382 |
|
383 |
/* Interpolate and output a BSDF function using Klems basis */ |
384 |
static void |
385 |
eval_function(char *funame) |
386 |
{ |
387 |
ANGLE_BASIS *abp = get_basis(kbasis); |
388 |
int assignD = (fundefined(funame) < 6); |
389 |
FILE *ofp = open_component_file(CIE_Y); |
390 |
double iovec[6]; |
391 |
double sum; |
392 |
int i, j, n; |
393 |
|
394 |
initurand(npsamps); |
395 |
for (j = 0; j < abp->nangles; j++) { /* run through directions */ |
396 |
for (i = 0; i < abp->nangles; i++) { |
397 |
sum = 0; |
398 |
for (n = npsamps; n--; ) { /* average over patches */ |
399 |
if (output_orient > 0) |
400 |
fo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
401 |
else |
402 |
bo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
403 |
|
404 |
if (input_orient > 0) |
405 |
fi_getvec(iovec, i+urand(n), abp); |
406 |
else |
407 |
bi_getvec(iovec, i+urand(n), abp); |
408 |
|
409 |
if (assignD) { |
410 |
varset("Dx", '=', -iovec[3]); |
411 |
varset("Dy", '=', -iovec[4]); |
412 |
varset("Dz", '=', -iovec[5]); |
413 |
++eclock; |
414 |
} |
415 |
sum += funvalue(funame, 6, iovec); |
416 |
} |
417 |
fprintf(ofp, "\t%.3e\n", sum/npsamps); |
418 |
} |
419 |
fputc('\n', ofp); |
420 |
prog_show((j+1.)/abp->nangles); |
421 |
} |
422 |
prog_done(); |
423 |
if (fclose(ofp)) { |
424 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
425 |
exit(1); |
426 |
} |
427 |
} |
428 |
|
429 |
/* Interpolate and output a radial basis function BSDF representation */ |
430 |
static void |
431 |
eval_rbf(void) |
432 |
{ |
433 |
ANGLE_BASIS *abp = get_basis(kbasis); |
434 |
float (*XZarr)[2] = NULL; |
435 |
float bsdfarr[MAXPATCHES*MAXPATCHES]; |
436 |
FILE *cfp[3]; |
437 |
FVECT vin, vout; |
438 |
double sum, xsum, ysum, normf; |
439 |
int i, j, ni, no, nisamps, nosamps; |
440 |
/* sanity check */ |
441 |
if (abp->nangles > MAXPATCHES) { |
442 |
fprintf(stderr, "%s: too many patches!\n", progname); |
443 |
exit(1); |
444 |
} |
445 |
memset(bsdfarr, 0, sizeof(bsdfarr)); |
446 |
if (rbf_colorimetry == RBCtristimulus) |
447 |
XZarr = (float (*)[2])calloc(abp->nangles*abp->nangles, 2*sizeof(float)); |
448 |
nosamps = (int)(pow((double)npsamps, 0.67) + .5); |
449 |
nisamps = (npsamps + (nosamps>>1)) / nosamps; |
450 |
normf = 1./(double)(nisamps*nosamps); |
451 |
for (i = 0; i < abp->nangles; i++) { |
452 |
for (ni = nisamps; ni--; ) { /* sample over incident patch */ |
453 |
RBFNODE *rbf; |
454 |
if (input_orient > 0) /* vary incident patch loc. */ |
455 |
fi_getvec(vin, i+urand(ni), abp); |
456 |
else |
457 |
bi_getvec(vin, i+urand(ni), abp); |
458 |
|
459 |
rbf = advect_rbf(vin, lobe_lim); /* compute radial basis func */ |
460 |
|
461 |
for (j = 0; j < abp->nangles; j++) { |
462 |
sum = 0; /* sample over exiting patch */ |
463 |
xsum = ysum = 0; |
464 |
for (no = nosamps; no--; ) { |
465 |
SDValue sdv; |
466 |
if (output_orient > 0) |
467 |
fo_getvec(vout, j+(no+frandom())/nosamps, abp); |
468 |
else |
469 |
bo_getvec(vout, j+(no+frandom())/nosamps, abp); |
470 |
|
471 |
eval_rbfcol(&sdv, rbf, vout); |
472 |
sum += sdv.cieY; |
473 |
if (rbf_colorimetry == RBCtristimulus) { |
474 |
xsum += sdv.cieY * sdv.spec.cx; |
475 |
ysum += sdv.cieY * sdv.spec.cy; |
476 |
} |
477 |
} |
478 |
no = j*abp->nangles + i; |
479 |
bsdfarr[no] += sum * normf; |
480 |
if (rbf_colorimetry == RBCtristimulus) { |
481 |
XZarr[no][0] += xsum*sum*normf/ysum; |
482 |
XZarr[no][1] += (sum - xsum - ysum)*sum*normf/ysum; |
483 |
} |
484 |
} |
485 |
if (rbf != NULL) |
486 |
free(rbf); |
487 |
} |
488 |
prog_show((i+1.)/abp->nangles); |
489 |
} |
490 |
/* write out our matrix */ |
491 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
492 |
no = 0; |
493 |
for (j = 0; j < abp->nangles; j++) { |
494 |
for (i = 0; i < abp->nangles; i++, no++) |
495 |
fprintf(cfp[CIE_Y], "\t%.3e\n", bsdfarr[no]); |
496 |
fputc('\n', cfp[CIE_Y]); |
497 |
} |
498 |
prog_done(); |
499 |
if (fclose(cfp[CIE_Y])) { |
500 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
501 |
exit(1); |
502 |
} |
503 |
if (XZarr == NULL) /* no color? */ |
504 |
return; |
505 |
cfp[CIE_X] = open_component_file(CIE_X); |
506 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
507 |
no = 0; |
508 |
for (j = 0; j < abp->nangles; j++) { |
509 |
for (i = 0; i < abp->nangles; i++, no++) { |
510 |
fprintf(cfp[CIE_X], "\t%.3e\n", XZarr[no][0]); |
511 |
fprintf(cfp[CIE_Z], "\t%.3e\n", XZarr[no][1]); |
512 |
} |
513 |
fputc('\n', cfp[CIE_X]); |
514 |
fputc('\n', cfp[CIE_Z]); |
515 |
} |
516 |
free(XZarr); |
517 |
if (fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z])) { |
518 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
519 |
exit(1); |
520 |
} |
521 |
} |
522 |
|
523 |
#if defined(_WIN32) || defined(_WIN64) |
524 |
/* Execute wrapBSDF command (may never return) */ |
525 |
static int |
526 |
wrap_up(void) |
527 |
{ |
528 |
char cmd[32700]; |
529 |
|
530 |
if (bsdf_manuf[0]) { |
531 |
add_wbsdf("-f", 1); |
532 |
strcpy(cmd, "m="); |
533 |
strcpy(cmd+2, bsdf_manuf); |
534 |
add_wbsdf(cmd, 0); |
535 |
} |
536 |
if (bsdf_name[0]) { |
537 |
add_wbsdf("-f", 1); |
538 |
strcpy(cmd, "n="); |
539 |
strcpy(cmd+2, bsdf_name); |
540 |
add_wbsdf(cmd, 0); |
541 |
} |
542 |
if (!convert_commandline(cmd, sizeof(cmd), wrapBSDF)) { |
543 |
fputs(progname, stderr); |
544 |
fputs(": command line too long in wrap_up()\n", stderr); |
545 |
return(1); |
546 |
} |
547 |
return(system(cmd)); |
548 |
} |
549 |
#else |
550 |
/* Execute wrapBSDF command (may never return) */ |
551 |
static int |
552 |
wrap_up(void) |
553 |
{ |
554 |
char buf[256]; |
555 |
char *compath = getpath((char *)wrapBSDF[0], getenv("PATH"), X_OK); |
556 |
|
557 |
if (compath == NULL) { |
558 |
fprintf(stderr, "%s: cannot locate %s\n", progname, wrapBSDF[0]); |
559 |
return(1); |
560 |
} |
561 |
if (bsdf_manuf[0]) { |
562 |
add_wbsdf("-f", 1); |
563 |
strcpy(buf, "m="); |
564 |
strcpy(buf+2, bsdf_manuf); |
565 |
add_wbsdf(buf, 0); |
566 |
} |
567 |
if (bsdf_name[0]) { |
568 |
add_wbsdf("-f", 1); |
569 |
strcpy(buf, "n="); |
570 |
strcpy(buf+2, bsdf_name); |
571 |
add_wbsdf(buf, 0); |
572 |
} |
573 |
execv(compath, wrapBSDF); /* successful call never returns */ |
574 |
perror(compath); |
575 |
return(1); |
576 |
} |
577 |
#endif |
578 |
|
579 |
#define HEAD_BUFLEN 10240 |
580 |
static char head_buf[HEAD_BUFLEN]; |
581 |
static int cur_headlen = 0; |
582 |
|
583 |
/* Record header line as comment associated with this SIR input */ |
584 |
static int |
585 |
record2header(char *s) |
586 |
{ |
587 |
int len = strlen(s); |
588 |
|
589 |
if (cur_headlen+len >= HEAD_BUFLEN-6) |
590 |
return(0); |
591 |
/* includes EOL */ |
592 |
strcpy(head_buf+cur_headlen, s); |
593 |
cur_headlen += len; |
594 |
|
595 |
#if defined(_WIN32) || defined(_WIN64) |
596 |
if (head_buf[cur_headlen-1] == '\n') |
597 |
head_buf[cur_headlen-1] = '\t'; |
598 |
#endif |
599 |
return(1); |
600 |
} |
601 |
|
602 |
/* Finish off header for this file */ |
603 |
static void |
604 |
done_header(void) |
605 |
{ |
606 |
while (cur_headlen > 0 && isspace(head_buf[cur_headlen-1])) |
607 |
--cur_headlen; |
608 |
head_buf[cur_headlen] = '\0'; |
609 |
if (!cur_headlen) |
610 |
return; |
611 |
add_wbsdf("-C", 1); |
612 |
add_wbsdf(head_buf, 0); |
613 |
head_buf[cur_headlen=0] = '\0'; |
614 |
} |
615 |
|
616 |
/* Read in BSDF and interpolate as Klems matrix representation */ |
617 |
int |
618 |
main(int argc, char *argv[]) |
619 |
{ |
620 |
int dofwd = 0, dobwd = 1; |
621 |
char buf[1024]; |
622 |
char *cp; |
623 |
int i, na; |
624 |
|
625 |
progname = argv[0]; |
626 |
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
627 |
esupport &= ~(E_INCHAN|E_OUTCHAN); |
628 |
scompile("PI:3.14159265358979323846", NULL, 0); |
629 |
biggerlib(); |
630 |
for (i = 1; i < argc && (argv[i][0] == '-') | (argv[i][0] == '+'); i++) |
631 |
switch (argv[i][1]) { /* get options */ |
632 |
case 'n': |
633 |
npsamps = atoi(argv[++i]); |
634 |
if (npsamps <= 0) |
635 |
goto userr; |
636 |
break; |
637 |
case 'e': |
638 |
scompile(argv[++i], NULL, 0); |
639 |
single_plane_incident = 0; |
640 |
break; |
641 |
case 'f': |
642 |
if ((argv[i][0] == '-') & !argv[i][2]) { |
643 |
if (strchr(argv[++i], '=') != NULL) { |
644 |
add_wbsdf("-f", 1); |
645 |
add_wbsdf(argv[i], 1); |
646 |
} else { |
647 |
char *fpath = getpath(argv[i], |
648 |
getrlibpath(), 0); |
649 |
if (fpath == NULL) { |
650 |
fprintf(stderr, |
651 |
"%s: cannot find file '%s'\n", |
652 |
argv[0], argv[i]); |
653 |
return(1); |
654 |
} |
655 |
fcompile(fpath); |
656 |
single_plane_incident = 0; |
657 |
} |
658 |
} else |
659 |
dofwd = (argv[i][0] == '+'); |
660 |
break; |
661 |
case 'b': |
662 |
dobwd = (argv[i][0] == '+'); |
663 |
break; |
664 |
case 'h': |
665 |
kbasis = klems_half; |
666 |
add_wbsdf("-a", 1); |
667 |
add_wbsdf("kh", 1); |
668 |
break; |
669 |
case 'q': |
670 |
kbasis = klems_quarter; |
671 |
add_wbsdf("-a", 1); |
672 |
add_wbsdf("kq", 1); |
673 |
break; |
674 |
case 'l': |
675 |
lobe_lim = atoi(argv[++i]); |
676 |
break; |
677 |
case 'p': |
678 |
do_prog = atoi(argv[i]+2); |
679 |
break; |
680 |
case 'C': |
681 |
add_wbsdf(argv[i], 1); |
682 |
add_wbsdf(argv[++i], 1); |
683 |
break; |
684 |
default: |
685 |
goto userr; |
686 |
} |
687 |
if (kbasis == klems_full) { /* default (full) basis? */ |
688 |
add_wbsdf("-a", 1); |
689 |
add_wbsdf("kf", 1); |
690 |
} |
691 |
strcpy(buf, "File produced by: "); |
692 |
if (convert_commandline(buf+18, sizeof(buf)-18, argv) != NULL) { |
693 |
add_wbsdf("-C", 1); add_wbsdf(buf, 0); |
694 |
} |
695 |
if (single_plane_incident >= 0) { /* function-based BSDF? */ |
696 |
if (i != argc-1 || fundefined(argv[i]) < 3) { |
697 |
fprintf(stderr, |
698 |
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
699 |
progname); |
700 |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n"); |
701 |
goto userr; |
702 |
} |
703 |
doptimize(1); /* optimize definitions */ |
704 |
++eclock; |
705 |
if (dofwd) { |
706 |
input_orient = -1; |
707 |
output_orient = -1; |
708 |
prog_start("Evaluating outside reflectance"); |
709 |
eval_function(argv[i]); |
710 |
output_orient = 1; |
711 |
prog_start("Evaluating outside->inside transmission"); |
712 |
eval_function(argv[i]); |
713 |
} |
714 |
if (dobwd) { |
715 |
input_orient = 1; |
716 |
output_orient = 1; |
717 |
prog_start("Evaluating inside reflectance"); |
718 |
eval_function(argv[i]); |
719 |
output_orient = -1; |
720 |
prog_start("Evaluating inside->outside transmission"); |
721 |
eval_function(argv[i]); |
722 |
} |
723 |
return(wrap_up()); |
724 |
} |
725 |
/* XML input? */ |
726 |
if (i == argc-1 && (cp = argv[i]+strlen(argv[i])-4) > argv[i] && |
727 |
!strcasecmp(cp, ".xml")) { |
728 |
eval_bsdf(argv[i]); /* load & resample BSDF */ |
729 |
return(wrap_up()); |
730 |
} |
731 |
if (i < argc) { /* open input files if given */ |
732 |
int nbsdf = 0; |
733 |
for ( ; i < argc; i++) { /* interpolate each component */ |
734 |
FILE *fpin = fopen(argv[i], "rb"); |
735 |
if (fpin == NULL) { |
736 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
737 |
progname, argv[i]); |
738 |
return(1); |
739 |
} |
740 |
sprintf(buf, "%s:\n", argv[i]); |
741 |
record2header(buf); |
742 |
sir_headshare = &record2header; |
743 |
if (!load_bsdf_rep(fpin)) |
744 |
return(1); |
745 |
fclose(fpin); |
746 |
done_header(); |
747 |
sprintf(buf, "Interpolating component '%s'", argv[i]); |
748 |
prog_start(buf); |
749 |
eval_rbf(); |
750 |
} |
751 |
return(wrap_up()); |
752 |
} |
753 |
SET_FILE_BINARY(stdin); /* load from stdin */ |
754 |
record2header("<stdin>:\n"); |
755 |
sir_headshare = &record2header; |
756 |
if (!load_bsdf_rep(stdin)) |
757 |
return(1); |
758 |
done_header(); |
759 |
prog_start("Interpolating from standard input"); |
760 |
eval_rbf(); /* resample dist. */ |
761 |
return(wrap_up()); |
762 |
userr: |
763 |
fprintf(stderr, |
764 |
"Usage: %s [-n spp][-h|-q][-l maxlobes] [bsdf.sir ..] > bsdf.xml\n", progname); |
765 |
fprintf(stderr, |
766 |
" or: %s [-n spp][-h|-q] bsdf_in.xml > bsdf_out.xml\n", progname); |
767 |
fprintf(stderr, |
768 |
" or: %s [-n spp][-h|-q][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n", |
769 |
progname); |
770 |
return(1); |
771 |
} |