| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: bsdf2klems.c,v 2.37 2025/06/03 21:31:51 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 "rtio.h" |
| 16 |
#include "calcomp.h" |
| 17 |
#include "bsdfrep.h" |
| 18 |
#include "bsdf_m.h" |
| 19 |
/* tristimulus components */ |
| 20 |
enum {CIE_X, CIE_Y, CIE_Z}; |
| 21 |
/* assumed maximum # Klems patches */ |
| 22 |
#define MAXPATCHES 145 |
| 23 |
/* selected basis function name */ |
| 24 |
static const char klems_full[] = "LBNL/Klems Full"; |
| 25 |
static const char klems_half[] = "LBNL/Klems Half"; |
| 26 |
static const char klems_quarter[] = "LBNL/Klems Quarter"; |
| 27 |
static const char *kbasis = klems_full; |
| 28 |
/* number of BSDF samples per patch */ |
| 29 |
static int npsamps = 1024; |
| 30 |
/* limit on number of RBF lobes */ |
| 31 |
static int lobe_lim = 15000; |
| 32 |
/* progress bar length */ |
| 33 |
static int do_prog = 79; |
| 34 |
|
| 35 |
#define MAXCARG 512 /* wrapBSDF command */ |
| 36 |
static char *wrapBSDF[MAXCARG] = {"wrapBSDF", "-W", "-UU"}; |
| 37 |
static int wbsdfac = 3; |
| 38 |
|
| 39 |
/* Add argument to wrapBSDF, allocating space if !isstatic */ |
| 40 |
static void |
| 41 |
add_wbsdf(const char *arg, int isstatic) |
| 42 |
{ |
| 43 |
if (arg == NULL) |
| 44 |
return; |
| 45 |
if (wbsdfac >= MAXCARG-1) { |
| 46 |
fputs(progname, stderr); |
| 47 |
fputs(": too many command arguments to wrapBSDF\n", stderr); |
| 48 |
exit(1); |
| 49 |
} |
| 50 |
if (!*arg) |
| 51 |
arg = ""; |
| 52 |
else if (!isstatic) |
| 53 |
arg = savqstr((char *)arg); |
| 54 |
|
| 55 |
wrapBSDF[wbsdfac++] = (char *)arg; |
| 56 |
} |
| 57 |
|
| 58 |
/* Start new progress bar */ |
| 59 |
#define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else |
| 60 |
|
| 61 |
/* Draw progress bar of the appropriate length */ |
| 62 |
static void |
| 63 |
prog_show(double frac) |
| 64 |
{ |
| 65 |
static unsigned call_cnt = 0; |
| 66 |
static char lastc[] = "-\\|/"; |
| 67 |
char pbar[256]; |
| 68 |
int nchars; |
| 69 |
|
| 70 |
if (do_prog <= 1) return; |
| 71 |
if (do_prog > sizeof(pbar)-2) |
| 72 |
do_prog = sizeof(pbar)-2; |
| 73 |
if (frac < 0) frac = 0; |
| 74 |
else if (frac >= 1) frac = .9999; |
| 75 |
nchars = do_prog*frac; |
| 76 |
pbar[0] = '\r'; |
| 77 |
memset(pbar+1, '*', nchars); |
| 78 |
pbar[nchars+1] = lastc[call_cnt++ & 3]; |
| 79 |
memset(pbar+2+nchars, '-', do_prog-nchars-1); |
| 80 |
pbar[do_prog+1] = '\0'; |
| 81 |
fputs(pbar, stderr); |
| 82 |
} |
| 83 |
|
| 84 |
/* Finish progress bar */ |
| 85 |
static void |
| 86 |
prog_done(void) |
| 87 |
{ |
| 88 |
int n = do_prog; |
| 89 |
|
| 90 |
if (n <= 1) return; |
| 91 |
fputc('\r', stderr); |
| 92 |
while (n--) |
| 93 |
fputc(' ', stderr); |
| 94 |
fputc('\r', stderr); |
| 95 |
} |
| 96 |
|
| 97 |
/* Return angle basis corresponding to the given name */ |
| 98 |
static ANGLE_BASIS * |
| 99 |
get_basis(const char *bn) |
| 100 |
{ |
| 101 |
int n = nabases; |
| 102 |
|
| 103 |
while (n-- > 0) |
| 104 |
if (!strcasecmp(bn, abase_list[n].name)) |
| 105 |
return &abase_list[n]; |
| 106 |
return NULL; |
| 107 |
} |
| 108 |
|
| 109 |
/* Copy geometry string to file for wrapBSDF */ |
| 110 |
static char * |
| 111 |
save_geom(const char *mgf) |
| 112 |
{ |
| 113 |
char *tfname = mktemp(savqstr(TEMPLATE)); |
| 114 |
int fd = open(tfname, O_CREAT|O_WRONLY, 0600); |
| 115 |
|
| 116 |
if (fd < 0) |
| 117 |
return(NULL); |
| 118 |
write(fd, mgf, strlen(mgf)); |
| 119 |
close(fd); |
| 120 |
add_wbsdf("-g", 1); |
| 121 |
add_wbsdf(tfname, 1); |
| 122 |
return(tfname); |
| 123 |
} |
| 124 |
|
| 125 |
/* Open XYZ component file for output and add appropriate arguments */ |
| 126 |
static FILE * |
| 127 |
open_component_file(int c) |
| 128 |
{ |
| 129 |
static const char sname[3][6] = {"CIE-X", "CIE-Y", "CIE-Z"}; |
| 130 |
static const char cname[4][4] = {"-rf", "-tf", "-tb", "-rb"}; |
| 131 |
char *tfname = mktemp(savqstr(TEMPLATE)); |
| 132 |
FILE *fp = fopen(tfname, "w"); |
| 133 |
|
| 134 |
if (fp == NULL) { |
| 135 |
fprintf(stderr, "%s: cannot open '%s' for writing\n", |
| 136 |
progname, tfname); |
| 137 |
exit(1); |
| 138 |
} |
| 139 |
add_wbsdf("-s", 1); add_wbsdf(sname[c], 1); |
| 140 |
add_wbsdf(cname[(input_orient>0)<<1 | (output_orient>0)], 1); |
| 141 |
add_wbsdf(tfname, 1); |
| 142 |
return(fp); |
| 143 |
} |
| 144 |
|
| 145 |
/* Load and resample XML BSDF description using Klems basis */ |
| 146 |
static void |
| 147 |
eval_bsdf(const char *fname) |
| 148 |
{ |
| 149 |
ANGLE_BASIS *abp = get_basis(kbasis); |
| 150 |
FILE *cfp[3]; |
| 151 |
SDData bsd; |
| 152 |
SDError ec; |
| 153 |
FVECT vin, vout; |
| 154 |
SDValue sdv; |
| 155 |
double sum, xsum, ysum; |
| 156 |
int i, j, n; |
| 157 |
|
| 158 |
initurand(npsamps); |
| 159 |
SDclearBSDF(&bsd, fname); /* load BSDF file */ |
| 160 |
if ((ec = SDloadFile(&bsd, fname)) != SDEnone) |
| 161 |
goto err; |
| 162 |
if (bsd.mgf != NULL) /* save geometry */ |
| 163 |
save_geom(bsd.mgf); |
| 164 |
if (bsd.matn[0]) /* save identifier(s) */ |
| 165 |
strcpy(bsdf_name, bsd.matn); |
| 166 |
if (bsd.makr[0]) |
| 167 |
strcpy(bsdf_manuf, bsd.makr); |
| 168 |
if (bsd.dim[2] > 0) { /* save dimension(s) */ |
| 169 |
char buf[64]; |
| 170 |
if ((bsd.dim[0] > 0) & (bsd.dim[1] > 0)) |
| 171 |
sprintf(buf, "w=%g;h=%g;t=%g", |
| 172 |
bsd.dim[0], bsd.dim[1], bsd.dim[2]); |
| 173 |
else |
| 174 |
sprintf(buf, "t=%g", bsd.dim[2]); |
| 175 |
add_wbsdf("-f", 1); |
| 176 |
add_wbsdf(buf, 0); |
| 177 |
} |
| 178 |
/* front reflection */ |
| 179 |
if (bsd.rf != NULL || bsd.rLambFront.cieY > .002) { |
| 180 |
input_orient = 1; output_orient = 1; |
| 181 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
| 182 |
if (bsd.rf != NULL && bsd.rf->comp[0].cspec[2].flags) { |
| 183 |
rbf_colorimetry = RBCtristimulus; |
| 184 |
cfp[CIE_X] = open_component_file(CIE_X); |
| 185 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
| 186 |
} else |
| 187 |
rbf_colorimetry = RBCphotopic; |
| 188 |
for (j = 0; j < abp->nangles; j++) { |
| 189 |
for (i = 0; i < abp->nangles; i++) { |
| 190 |
sum = 0; /* average over patches */ |
| 191 |
xsum = ysum = 0; |
| 192 |
for (n = npsamps; n-- > 0; ) { |
| 193 |
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
| 194 |
fi_getvec(vin, i+urand(n), abp); |
| 195 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
| 196 |
if (ec != SDEnone) |
| 197 |
goto err; |
| 198 |
sum += sdv.cieY; |
| 199 |
if (rbf_colorimetry == RBCtristimulus) { |
| 200 |
xsum += sdv.cieY * sdv.spec.cx; |
| 201 |
ysum += sdv.cieY * sdv.spec.cy; |
| 202 |
} |
| 203 |
} |
| 204 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
| 205 |
if (rbf_colorimetry == RBCtristimulus) { |
| 206 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
| 207 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
| 208 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
| 209 |
} |
| 210 |
} |
| 211 |
fputc('\n', cfp[CIE_Y]); /* extra space between rows */ |
| 212 |
if (rbf_colorimetry == RBCtristimulus) { |
| 213 |
fputc('\n', cfp[CIE_X]); |
| 214 |
fputc('\n', cfp[CIE_Z]); |
| 215 |
} |
| 216 |
} |
| 217 |
if (fclose(cfp[CIE_Y])) { |
| 218 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
| 219 |
exit(1); |
| 220 |
} |
| 221 |
if (rbf_colorimetry == RBCtristimulus && |
| 222 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
| 223 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
| 224 |
exit(1); |
| 225 |
} |
| 226 |
} |
| 227 |
/* back reflection */ |
| 228 |
if (bsd.rb != NULL || bsd.rLambBack.cieY > .002) { |
| 229 |
input_orient = -1; output_orient = -1; |
| 230 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
| 231 |
if (bsd.rb != NULL && bsd.rb->comp[0].cspec[2].flags) { |
| 232 |
rbf_colorimetry = RBCtristimulus; |
| 233 |
cfp[CIE_X] = open_component_file(CIE_X); |
| 234 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
| 235 |
} else |
| 236 |
rbf_colorimetry = RBCphotopic; |
| 237 |
for (j = 0; j < abp->nangles; j++) { |
| 238 |
for (i = 0; i < abp->nangles; i++) { |
| 239 |
sum = 0; /* average over patches */ |
| 240 |
xsum = ysum = 0; |
| 241 |
for (n = npsamps; n-- > 0; ) { |
| 242 |
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
| 243 |
bi_getvec(vin, i+urand(n), abp); |
| 244 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
| 245 |
if (ec != SDEnone) |
| 246 |
goto err; |
| 247 |
sum += sdv.cieY; |
| 248 |
if (rbf_colorimetry == RBCtristimulus) { |
| 249 |
xsum += sdv.cieY * sdv.spec.cx; |
| 250 |
ysum += sdv.cieY * sdv.spec.cy; |
| 251 |
} |
| 252 |
} |
| 253 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
| 254 |
if (rbf_colorimetry == RBCtristimulus) { |
| 255 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
| 256 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
| 257 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
| 258 |
} |
| 259 |
} |
| 260 |
if (rbf_colorimetry == RBCtristimulus) { |
| 261 |
fputc('\n', cfp[CIE_X]); |
| 262 |
fputc('\n', cfp[CIE_Z]); |
| 263 |
} |
| 264 |
} |
| 265 |
if (fclose(cfp[CIE_Y])) { |
| 266 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
| 267 |
exit(1); |
| 268 |
} |
| 269 |
if (rbf_colorimetry == RBCtristimulus && |
| 270 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
| 271 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
| 272 |
exit(1); |
| 273 |
} |
| 274 |
} |
| 275 |
/* front transmission */ |
| 276 |
if (bsd.tf != NULL || bsd.tLambFront.cieY > .002) { |
| 277 |
input_orient = 1; output_orient = -1; |
| 278 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
| 279 |
if (bsd.tf != NULL && bsd.tf->comp[0].cspec[2].flags) { |
| 280 |
rbf_colorimetry = RBCtristimulus; |
| 281 |
cfp[CIE_X] = open_component_file(CIE_X); |
| 282 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
| 283 |
} else |
| 284 |
rbf_colorimetry = RBCphotopic; |
| 285 |
for (j = 0; j < abp->nangles; j++) { |
| 286 |
for (i = 0; i < abp->nangles; i++) { |
| 287 |
sum = 0; /* average over patches */ |
| 288 |
xsum = ysum = 0; |
| 289 |
for (n = npsamps; n-- > 0; ) { |
| 290 |
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
| 291 |
fi_getvec(vin, i+urand(n), abp); |
| 292 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
| 293 |
if (ec != SDEnone) |
| 294 |
goto err; |
| 295 |
sum += sdv.cieY; |
| 296 |
if (rbf_colorimetry == RBCtristimulus) { |
| 297 |
xsum += sdv.cieY * sdv.spec.cx; |
| 298 |
ysum += sdv.cieY * sdv.spec.cy; |
| 299 |
} |
| 300 |
} |
| 301 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
| 302 |
if (rbf_colorimetry == RBCtristimulus) { |
| 303 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
| 304 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
| 305 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
| 306 |
} |
| 307 |
} |
| 308 |
if (rbf_colorimetry == RBCtristimulus) { |
| 309 |
fputc('\n', cfp[CIE_X]); |
| 310 |
fputc('\n', cfp[CIE_Z]); |
| 311 |
} |
| 312 |
} |
| 313 |
if (fclose(cfp[CIE_Y])) { |
| 314 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
| 315 |
exit(1); |
| 316 |
} |
| 317 |
if (rbf_colorimetry == RBCtristimulus && |
| 318 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
| 319 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
| 320 |
exit(1); |
| 321 |
} |
| 322 |
} |
| 323 |
/* back transmission */ |
| 324 |
if ((bsd.tb != NULL) | (bsd.tf != NULL)) { |
| 325 |
input_orient = -1; output_orient = 1; |
| 326 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
| 327 |
if (bsd.tb != NULL) |
| 328 |
rbf_colorimetry = bsd.tb->comp[0].cspec[2].flags |
| 329 |
? RBCtristimulus : RBCphotopic ; |
| 330 |
if (rbf_colorimetry == RBCtristimulus) { |
| 331 |
cfp[CIE_X] = open_component_file(CIE_X); |
| 332 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
| 333 |
} |
| 334 |
for (j = 0; j < abp->nangles; j++) { |
| 335 |
for (i = 0; i < abp->nangles; i++) { |
| 336 |
sum = 0; /* average over patches */ |
| 337 |
xsum = ysum = 0; |
| 338 |
for (n = npsamps; n-- > 0; ) { |
| 339 |
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
| 340 |
bi_getvec(vin, i+urand(n), abp); |
| 341 |
ec = SDevalBSDF(&sdv, vin, vout, &bsd); |
| 342 |
if (ec != SDEnone) |
| 343 |
goto err; |
| 344 |
sum += sdv.cieY; |
| 345 |
if (rbf_colorimetry == RBCtristimulus) { |
| 346 |
xsum += sdv.cieY * sdv.spec.cx; |
| 347 |
ysum += sdv.cieY * sdv.spec.cy; |
| 348 |
} |
| 349 |
} |
| 350 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps); |
| 351 |
if (rbf_colorimetry == RBCtristimulus) { |
| 352 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum)); |
| 353 |
fprintf(cfp[CIE_Z], "\t%.3e\n", |
| 354 |
(sum - xsum - ysum)*sum/(npsamps*ysum)); |
| 355 |
} |
| 356 |
} |
| 357 |
if (rbf_colorimetry == RBCtristimulus) { |
| 358 |
fputc('\n', cfp[CIE_X]); |
| 359 |
fputc('\n', cfp[CIE_Z]); |
| 360 |
} |
| 361 |
} |
| 362 |
if (fclose(cfp[CIE_Y])) { |
| 363 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
| 364 |
exit(1); |
| 365 |
} |
| 366 |
if (rbf_colorimetry == RBCtristimulus && |
| 367 |
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) { |
| 368 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
| 369 |
exit(1); |
| 370 |
} |
| 371 |
} |
| 372 |
SDfreeBSDF(&bsd); /* all done */ |
| 373 |
return; |
| 374 |
err: |
| 375 |
SDreportError(ec, stderr); |
| 376 |
exit(1); |
| 377 |
} |
| 378 |
|
| 379 |
/* Interpolate and output a BSDF function using Klems basis */ |
| 380 |
static void |
| 381 |
eval_function(char *funame) |
| 382 |
{ |
| 383 |
ANGLE_BASIS *abp = get_basis(kbasis); |
| 384 |
int assignD = (fundefined(funame) < 6); |
| 385 |
FILE *ofp = open_component_file(CIE_Y); |
| 386 |
double iovec[6]; |
| 387 |
double sum; |
| 388 |
int i, j, n; |
| 389 |
|
| 390 |
initurand(npsamps); |
| 391 |
for (j = 0; j < abp->nangles; j++) { /* run through directions */ |
| 392 |
for (i = 0; i < abp->nangles; i++) { |
| 393 |
sum = 0; |
| 394 |
for (n = npsamps; n--; ) { /* average over patches */ |
| 395 |
if (output_orient > 0) |
| 396 |
fo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
| 397 |
else |
| 398 |
bo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
| 399 |
|
| 400 |
if (input_orient > 0) |
| 401 |
fi_getvec(iovec, i+urand(n), abp); |
| 402 |
else |
| 403 |
bi_getvec(iovec, i+urand(n), abp); |
| 404 |
|
| 405 |
if (assignD) { |
| 406 |
varset("Dx", '=', -iovec[3]); |
| 407 |
varset("Dy", '=', -iovec[4]); |
| 408 |
varset("Dz", '=', -iovec[5]); |
| 409 |
++eclock; |
| 410 |
} |
| 411 |
sum += funvalue(funame, 6, iovec); |
| 412 |
} |
| 413 |
fprintf(ofp, "\t%.3e\n", sum/npsamps); |
| 414 |
} |
| 415 |
fputc('\n', ofp); |
| 416 |
prog_show((j+1.)/abp->nangles); |
| 417 |
} |
| 418 |
prog_done(); |
| 419 |
if (fclose(ofp)) { |
| 420 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
| 421 |
exit(1); |
| 422 |
} |
| 423 |
} |
| 424 |
|
| 425 |
/* Interpolate and output a radial basis function BSDF representation */ |
| 426 |
static void |
| 427 |
eval_rbf(void) |
| 428 |
{ |
| 429 |
ANGLE_BASIS *abp = get_basis(kbasis); |
| 430 |
float (*XZarr)[2] = NULL; |
| 431 |
float bsdfarr[MAXPATCHES*MAXPATCHES]; |
| 432 |
FILE *cfp[3]; |
| 433 |
FVECT vin, vout; |
| 434 |
double sum, xsum, ysum, normf; |
| 435 |
int i, j, ni, no, nisamps, nosamps; |
| 436 |
/* sanity check */ |
| 437 |
if (abp->nangles > MAXPATCHES) { |
| 438 |
fprintf(stderr, "%s: too many patches!\n", progname); |
| 439 |
exit(1); |
| 440 |
} |
| 441 |
memset(bsdfarr, 0, sizeof(bsdfarr)); |
| 442 |
if (rbf_colorimetry == RBCtristimulus) |
| 443 |
XZarr = (float (*)[2])calloc(abp->nangles*abp->nangles, 2*sizeof(float)); |
| 444 |
nosamps = (int)(pow((double)npsamps, 0.67) + .5); |
| 445 |
nisamps = (npsamps + (nosamps>>1)) / nosamps; |
| 446 |
normf = 1./(double)(nisamps*nosamps); |
| 447 |
for (i = 0; i < abp->nangles; i++) { |
| 448 |
for (ni = nisamps; ni--; ) { /* sample over incident patch */ |
| 449 |
RBFNODE *rbf; |
| 450 |
if (input_orient > 0) /* vary incident patch loc. */ |
| 451 |
fi_getvec(vin, i+urand(ni), abp); |
| 452 |
else |
| 453 |
bi_getvec(vin, i+urand(ni), abp); |
| 454 |
|
| 455 |
rbf = advect_rbf(vin, lobe_lim); /* compute radial basis func */ |
| 456 |
|
| 457 |
for (j = 0; j < abp->nangles; j++) { |
| 458 |
sum = 0; /* sample over exiting patch */ |
| 459 |
xsum = ysum = 0; |
| 460 |
for (no = nosamps; no--; ) { |
| 461 |
SDValue sdv; |
| 462 |
if (output_orient > 0) |
| 463 |
fo_getvec(vout, j+(no+frandom())/nosamps, abp); |
| 464 |
else |
| 465 |
bo_getvec(vout, j+(no+frandom())/nosamps, abp); |
| 466 |
|
| 467 |
eval_rbfcol(&sdv, rbf, vout); |
| 468 |
sum += sdv.cieY; |
| 469 |
if (rbf_colorimetry == RBCtristimulus) { |
| 470 |
xsum += sdv.cieY * sdv.spec.cx; |
| 471 |
ysum += sdv.cieY * sdv.spec.cy; |
| 472 |
} |
| 473 |
} |
| 474 |
no = j*abp->nangles + i; |
| 475 |
bsdfarr[no] += sum * normf; |
| 476 |
if (rbf_colorimetry == RBCtristimulus) { |
| 477 |
XZarr[no][0] += xsum*sum*normf/ysum; |
| 478 |
XZarr[no][1] += (sum - xsum - ysum)*sum*normf/ysum; |
| 479 |
} |
| 480 |
} |
| 481 |
if (rbf != NULL) |
| 482 |
free(rbf); |
| 483 |
} |
| 484 |
prog_show((i+1.)/abp->nangles); |
| 485 |
} |
| 486 |
/* write out our matrix */ |
| 487 |
cfp[CIE_Y] = open_component_file(CIE_Y); |
| 488 |
no = 0; |
| 489 |
for (j = 0; j < abp->nangles; j++) { |
| 490 |
for (i = 0; i < abp->nangles; i++, no++) |
| 491 |
fprintf(cfp[CIE_Y], "\t%.3e\n", bsdfarr[no]); |
| 492 |
fputc('\n', cfp[CIE_Y]); |
| 493 |
} |
| 494 |
prog_done(); |
| 495 |
if (fclose(cfp[CIE_Y])) { |
| 496 |
fprintf(stderr, "%s: error writing Y output\n", progname); |
| 497 |
exit(1); |
| 498 |
} |
| 499 |
if (XZarr == NULL) /* no color? */ |
| 500 |
return; |
| 501 |
cfp[CIE_X] = open_component_file(CIE_X); |
| 502 |
cfp[CIE_Z] = open_component_file(CIE_Z); |
| 503 |
no = 0; |
| 504 |
for (j = 0; j < abp->nangles; j++) { |
| 505 |
for (i = 0; i < abp->nangles; i++, no++) { |
| 506 |
fprintf(cfp[CIE_X], "\t%.3e\n", XZarr[no][0]); |
| 507 |
fprintf(cfp[CIE_Z], "\t%.3e\n", XZarr[no][1]); |
| 508 |
} |
| 509 |
fputc('\n', cfp[CIE_X]); |
| 510 |
fputc('\n', cfp[CIE_Z]); |
| 511 |
} |
| 512 |
free(XZarr); |
| 513 |
if (fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z])) { |
| 514 |
fprintf(stderr, "%s: error writing X/Z output\n", progname); |
| 515 |
exit(1); |
| 516 |
} |
| 517 |
} |
| 518 |
|
| 519 |
#if defined(_WIN32) || defined(_WIN64) |
| 520 |
/* Execute wrapBSDF command (may never return) */ |
| 521 |
static int |
| 522 |
wrap_up(void) |
| 523 |
{ |
| 524 |
char cmd[32700]; |
| 525 |
|
| 526 |
if (bsdf_manuf[0]) { |
| 527 |
add_wbsdf("-f", 1); |
| 528 |
strcpy(cmd, "m="); |
| 529 |
strcpy(cmd+2, bsdf_manuf); |
| 530 |
add_wbsdf(cmd, 0); |
| 531 |
} |
| 532 |
if (bsdf_name[0]) { |
| 533 |
add_wbsdf("-f", 1); |
| 534 |
strcpy(cmd, "n="); |
| 535 |
strcpy(cmd+2, bsdf_name); |
| 536 |
add_wbsdf(cmd, 0); |
| 537 |
} |
| 538 |
if (!convert_commandline(cmd, sizeof(cmd), wrapBSDF)) { |
| 539 |
fputs(progname, stderr); |
| 540 |
fputs(": command line too long in wrap_up()\n", stderr); |
| 541 |
return(1); |
| 542 |
} |
| 543 |
return(system(cmd)); |
| 544 |
} |
| 545 |
#else |
| 546 |
/* Execute wrapBSDF command (may never return) */ |
| 547 |
static int |
| 548 |
wrap_up(void) |
| 549 |
{ |
| 550 |
char buf[256]; |
| 551 |
char *compath = getpath((char *)wrapBSDF[0], getenv("PATH"), X_OK); |
| 552 |
|
| 553 |
if (compath == NULL) { |
| 554 |
fprintf(stderr, "%s: cannot locate %s\n", progname, wrapBSDF[0]); |
| 555 |
return(1); |
| 556 |
} |
| 557 |
if (bsdf_manuf[0]) { |
| 558 |
add_wbsdf("-f", 1); |
| 559 |
strcpy(buf, "m="); |
| 560 |
strcpy(buf+2, bsdf_manuf); |
| 561 |
add_wbsdf(buf, 0); |
| 562 |
} |
| 563 |
if (bsdf_name[0]) { |
| 564 |
add_wbsdf("-f", 1); |
| 565 |
strcpy(buf, "n="); |
| 566 |
strcpy(buf+2, bsdf_name); |
| 567 |
add_wbsdf(buf, 0); |
| 568 |
} |
| 569 |
execv(compath, wrapBSDF); /* successful call never returns */ |
| 570 |
perror(compath); |
| 571 |
return(1); |
| 572 |
} |
| 573 |
#endif |
| 574 |
|
| 575 |
#define HEAD_BUFLEN 10240 |
| 576 |
static char head_buf[HEAD_BUFLEN]; |
| 577 |
static int cur_headlen = 0; |
| 578 |
|
| 579 |
/* Record header line as comment associated with this SIR input */ |
| 580 |
static int |
| 581 |
record2header(char *s) |
| 582 |
{ |
| 583 |
int len = strlen(s); |
| 584 |
|
| 585 |
if (cur_headlen+len >= HEAD_BUFLEN-6) |
| 586 |
return(0); |
| 587 |
/* includes EOL */ |
| 588 |
strcpy(head_buf+cur_headlen, s); |
| 589 |
cur_headlen += len; |
| 590 |
|
| 591 |
#if defined(_WIN32) || defined(_WIN64) |
| 592 |
if (head_buf[cur_headlen-1] == '\n') |
| 593 |
head_buf[cur_headlen-1] = '\t'; |
| 594 |
#endif |
| 595 |
return(1); |
| 596 |
} |
| 597 |
|
| 598 |
/* Finish off header for this file */ |
| 599 |
static void |
| 600 |
done_header(void) |
| 601 |
{ |
| 602 |
while (cur_headlen > 0 && isspace(head_buf[cur_headlen-1])) |
| 603 |
--cur_headlen; |
| 604 |
head_buf[cur_headlen] = '\0'; |
| 605 |
if (!cur_headlen) |
| 606 |
return; |
| 607 |
add_wbsdf("-C", 1); |
| 608 |
add_wbsdf(head_buf, 0); |
| 609 |
head_buf[cur_headlen=0] = '\0'; |
| 610 |
} |
| 611 |
|
| 612 |
/* Read in BSDF and interpolate as Klems matrix representation */ |
| 613 |
int |
| 614 |
main(int argc, char *argv[]) |
| 615 |
{ |
| 616 |
int dofwd = 0, dobwd = 1; |
| 617 |
char buf[1024]; |
| 618 |
char *cp; |
| 619 |
int i, na; |
| 620 |
/* set global progname */ |
| 621 |
fixargv0(argv[0]); |
| 622 |
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
| 623 |
esupport &= ~(E_INCHAN|E_OUTCHAN); |
| 624 |
scompile("PI:3.14159265358979323846", NULL, 0); |
| 625 |
biggerlib(); |
| 626 |
for (i = 1; i < argc && (argv[i][0] == '-') | (argv[i][0] == '+'); i++) |
| 627 |
switch (argv[i][1]) { /* get options */ |
| 628 |
case 'n': |
| 629 |
npsamps = atoi(argv[++i]); |
| 630 |
if (npsamps <= 0) |
| 631 |
goto userr; |
| 632 |
break; |
| 633 |
case 'e': |
| 634 |
scompile(argv[++i], NULL, 0); |
| 635 |
single_plane_incident = 0; |
| 636 |
break; |
| 637 |
case 'f': |
| 638 |
if ((argv[i][0] == '-') & !argv[i][2]) { |
| 639 |
if (strchr(argv[++i], '=') != NULL) { |
| 640 |
add_wbsdf("-f", 1); |
| 641 |
add_wbsdf(argv[i], 1); |
| 642 |
} else { |
| 643 |
char *fpath = getpath(argv[i], |
| 644 |
getrlibpath(), 0); |
| 645 |
if (fpath == NULL) { |
| 646 |
fprintf(stderr, |
| 647 |
"%s: cannot find file '%s'\n", |
| 648 |
argv[0], argv[i]); |
| 649 |
return(1); |
| 650 |
} |
| 651 |
fcompile(fpath); |
| 652 |
single_plane_incident = 0; |
| 653 |
} |
| 654 |
} else |
| 655 |
dofwd = (argv[i][0] == '+'); |
| 656 |
break; |
| 657 |
case 'b': |
| 658 |
dobwd = (argv[i][0] == '+'); |
| 659 |
break; |
| 660 |
case 'h': |
| 661 |
kbasis = klems_half; |
| 662 |
add_wbsdf("-a", 1); |
| 663 |
add_wbsdf("kh", 1); |
| 664 |
break; |
| 665 |
case 'q': |
| 666 |
kbasis = klems_quarter; |
| 667 |
add_wbsdf("-a", 1); |
| 668 |
add_wbsdf("kq", 1); |
| 669 |
break; |
| 670 |
case 'l': |
| 671 |
lobe_lim = atoi(argv[++i]); |
| 672 |
break; |
| 673 |
case 'p': |
| 674 |
do_prog = atoi(argv[i]+2); |
| 675 |
break; |
| 676 |
case 'C': |
| 677 |
add_wbsdf(argv[i], 1); |
| 678 |
add_wbsdf(argv[++i], 1); |
| 679 |
break; |
| 680 |
default: |
| 681 |
goto userr; |
| 682 |
} |
| 683 |
if (kbasis == klems_full) { /* default (full) basis? */ |
| 684 |
add_wbsdf("-a", 1); |
| 685 |
add_wbsdf("kf", 1); |
| 686 |
} |
| 687 |
strcpy(buf, "File produced by: "); |
| 688 |
if (convert_commandline(buf+18, sizeof(buf)-18, argv) != NULL) { |
| 689 |
add_wbsdf("-C", 1); add_wbsdf(buf, 0); |
| 690 |
} |
| 691 |
if (single_plane_incident >= 0) { /* function-based BSDF? */ |
| 692 |
if (i != argc-1 || fundefined(argv[i]) < 3) { |
| 693 |
fprintf(stderr, |
| 694 |
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
| 695 |
progname); |
| 696 |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n"); |
| 697 |
goto userr; |
| 698 |
} |
| 699 |
doptimize(1); /* optimize definitions */ |
| 700 |
++eclock; |
| 701 |
if (dofwd) { |
| 702 |
input_orient = -1; |
| 703 |
output_orient = -1; |
| 704 |
prog_start("Evaluating outside reflectance"); |
| 705 |
eval_function(argv[i]); |
| 706 |
output_orient = 1; |
| 707 |
prog_start("Evaluating outside->inside transmission"); |
| 708 |
eval_function(argv[i]); |
| 709 |
} |
| 710 |
if (dobwd) { |
| 711 |
input_orient = 1; |
| 712 |
output_orient = 1; |
| 713 |
prog_start("Evaluating inside reflectance"); |
| 714 |
eval_function(argv[i]); |
| 715 |
output_orient = -1; |
| 716 |
prog_start("Evaluating inside->outside transmission"); |
| 717 |
eval_function(argv[i]); |
| 718 |
} |
| 719 |
return(wrap_up()); |
| 720 |
} |
| 721 |
/* XML input? */ |
| 722 |
if (i == argc-1 && (cp = argv[i]+strlen(argv[i])-4) > argv[i] && |
| 723 |
!strcasecmp(cp, ".xml")) { |
| 724 |
eval_bsdf(argv[i]); /* load & resample BSDF */ |
| 725 |
return(wrap_up()); |
| 726 |
} |
| 727 |
if (i < argc) { /* open input files if given */ |
| 728 |
int nbsdf = 0; |
| 729 |
for ( ; i < argc; i++) { /* interpolate each component */ |
| 730 |
FILE *fpin = fopen(argv[i], "rb"); |
| 731 |
if (fpin == NULL) { |
| 732 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
| 733 |
progname, argv[i]); |
| 734 |
return(1); |
| 735 |
} |
| 736 |
sprintf(buf, "%s:\n", argv[i]); |
| 737 |
record2header(buf); |
| 738 |
sir_headshare = &record2header; |
| 739 |
if (!load_bsdf_rep(fpin)) |
| 740 |
return(1); |
| 741 |
fclose(fpin); |
| 742 |
done_header(); |
| 743 |
sprintf(buf, "Interpolating component '%s'", argv[i]); |
| 744 |
prog_start(buf); |
| 745 |
eval_rbf(); |
| 746 |
} |
| 747 |
return(wrap_up()); |
| 748 |
} |
| 749 |
SET_FILE_BINARY(stdin); /* load from stdin */ |
| 750 |
record2header("<stdin>:\n"); |
| 751 |
sir_headshare = &record2header; |
| 752 |
if (!load_bsdf_rep(stdin)) |
| 753 |
return(1); |
| 754 |
done_header(); |
| 755 |
prog_start("Interpolating from standard input"); |
| 756 |
eval_rbf(); /* resample dist. */ |
| 757 |
return(wrap_up()); |
| 758 |
userr: |
| 759 |
fprintf(stderr, |
| 760 |
"Usage: %s [-n spp][-h|-q][-l maxlobes] [bsdf.sir ..] > bsdf.xml\n", progname); |
| 761 |
fprintf(stderr, |
| 762 |
" or: %s [-n spp][-h|-q] bsdf_in.xml > bsdf_out.xml\n", progname); |
| 763 |
fprintf(stderr, |
| 764 |
" or: %s [-n spp][-h|-q][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n", |
| 765 |
progname); |
| 766 |
return(1); |
| 767 |
} |
