| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.62 2025/05/21 20:42:48 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Load measured BSDF interpolant and write out as XML file with tensor tree. |
| 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 |
/* reciprocity averaging option */ |
| 21 |
static const char *recip = ""; |
| 22 |
/* percentage to cull (<0 to turn off) */ |
| 23 |
static double pctcull = 90.; |
| 24 |
/* sampling order */ |
| 25 |
static int samp_order = 6; |
| 26 |
/* super-sampling threshold */ |
| 27 |
static double ssamp_thresh = 0.35; |
| 28 |
/* number of super-samples */ |
| 29 |
static int nssamp = 64; |
| 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", "-U"}; |
| 37 |
static int wbsdfac = 2; |
| 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 |
/* Create Yuv component file and add appropriate arguments */ |
| 59 |
static char * |
| 60 |
create_component_file(int c) |
| 61 |
{ |
| 62 |
static const char sname[3][6] = {"CIE-Y", "CIE-u", "CIE-v"}; |
| 63 |
static const char cname[4][4] = {"-rf", "-tf", "-tb", "-rb"}; |
| 64 |
char *tfname = mktemp(savqstr(TEMPLATE)); |
| 65 |
|
| 66 |
add_wbsdf("-s", 1); add_wbsdf(sname[c], 1); |
| 67 |
add_wbsdf(cname[(input_orient>0)<<1 | (output_orient>0)], 1); |
| 68 |
add_wbsdf(tfname, 1); |
| 69 |
return(tfname); |
| 70 |
} |
| 71 |
|
| 72 |
/* Start new progress bar */ |
| 73 |
#define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else |
| 74 |
|
| 75 |
/* Draw progress bar of the appropriate length */ |
| 76 |
static void |
| 77 |
prog_show(double frac) |
| 78 |
{ |
| 79 |
static unsigned call_cnt = 0; |
| 80 |
static char lastc[] = "-\\|/"; |
| 81 |
char pbar[256]; |
| 82 |
int nchars; |
| 83 |
|
| 84 |
if (do_prog <= 1) return; |
| 85 |
if (do_prog > sizeof(pbar)-2) |
| 86 |
do_prog = sizeof(pbar)-2; |
| 87 |
if (frac < 0) frac = 0; |
| 88 |
else if (frac >= 1) frac = .9999; |
| 89 |
nchars = do_prog*frac; |
| 90 |
pbar[0] = '\r'; |
| 91 |
memset(pbar+1, '*', nchars); |
| 92 |
pbar[nchars+1] = lastc[call_cnt++ & 3]; |
| 93 |
memset(pbar+2+nchars, '-', do_prog-nchars-1); |
| 94 |
pbar[do_prog+1] = '\0'; |
| 95 |
fputs(pbar, stderr); |
| 96 |
} |
| 97 |
|
| 98 |
/* Finish progress bar */ |
| 99 |
static void |
| 100 |
prog_done(void) |
| 101 |
{ |
| 102 |
int n = do_prog; |
| 103 |
|
| 104 |
if (n <= 1) return; |
| 105 |
fputc('\r', stderr); |
| 106 |
while (n--) |
| 107 |
fputc(' ', stderr); |
| 108 |
fputc('\r', stderr); |
| 109 |
} |
| 110 |
|
| 111 |
/* Compute absolute relative difference */ |
| 112 |
static double |
| 113 |
abs_diff(double v1, double v0) |
| 114 |
{ |
| 115 |
if ((v0 < 0) | (v1 < 0)) |
| 116 |
return(.0); |
| 117 |
v1 = (v1-v0)*2./(v0+v1+.0001); |
| 118 |
if (v1 < 0) |
| 119 |
return(-v1); |
| 120 |
return(v1); |
| 121 |
} |
| 122 |
|
| 123 |
/* Interpolate and output isotropic BSDF data */ |
| 124 |
static void |
| 125 |
eval_isotropic(char *funame) |
| 126 |
{ |
| 127 |
const int sqres = 1<<samp_order; |
| 128 |
const double sqfact = 1./(double)sqres; |
| 129 |
float *val_last = NULL; |
| 130 |
float *val_next = NULL; |
| 131 |
SDValue *sdv_next = NULL; |
| 132 |
FILE *ofp, *uvfp[2]; |
| 133 |
int assignD = 0; |
| 134 |
char cmd[128]; |
| 135 |
int ix, ox, oy; |
| 136 |
RREAL iovec[6]; |
| 137 |
float bsdf, uv[2]; |
| 138 |
|
| 139 |
if (pctcull >= 0) { |
| 140 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s", |
| 141 |
recip, pctcull, samp_order, create_component_file(0)); |
| 142 |
ofp = popen(cmd, "w"); |
| 143 |
if (ofp == NULL) { |
| 144 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n", |
| 145 |
progname); |
| 146 |
exit(1); |
| 147 |
} |
| 148 |
SET_FILE_BINARY(ofp); |
| 149 |
#ifdef getc_unlocked /* avoid lock/unlock overhead */ |
| 150 |
flockfile(ofp); |
| 151 |
#endif |
| 152 |
if (rbf_colorimetry == RBCtristimulus) { |
| 153 |
double uvcull = 100. - (100.-pctcull)*.25; |
| 154 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s", |
| 155 |
recip, uvcull, samp_order, create_component_file(1)); |
| 156 |
uvfp[0] = popen(cmd, "w"); |
| 157 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s", |
| 158 |
recip, uvcull, samp_order, create_component_file(2)); |
| 159 |
uvfp[1] = popen(cmd, "w"); |
| 160 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) { |
| 161 |
fprintf(stderr, "%s: cannot open pipes to uv output\n", |
| 162 |
progname); |
| 163 |
exit(1); |
| 164 |
} |
| 165 |
SET_FILE_BINARY(uvfp[0]); SET_FILE_BINARY(uvfp[1]); |
| 166 |
#ifdef getc_unlocked |
| 167 |
flockfile(uvfp[0]); flockfile(uvfp[1]); |
| 168 |
#endif |
| 169 |
} |
| 170 |
} else { |
| 171 |
ofp = fopen(create_component_file(0), "w"); |
| 172 |
if (ofp == NULL) { |
| 173 |
fprintf(stderr, "%s: cannot create Y output file\n", |
| 174 |
progname); |
| 175 |
exit(1); |
| 176 |
} |
| 177 |
fputs("{\n", ofp); |
| 178 |
if (rbf_colorimetry == RBCtristimulus) { |
| 179 |
uvfp[0] = fopen(create_component_file(1), "w"); |
| 180 |
uvfp[1] = fopen(create_component_file(2), "w"); |
| 181 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) { |
| 182 |
fprintf(stderr, "%s: cannot create uv output file(s)\n", |
| 183 |
progname); |
| 184 |
exit(1); |
| 185 |
} |
| 186 |
fputs("{\n", uvfp[0]); |
| 187 |
fputs("{\n", uvfp[1]); |
| 188 |
} |
| 189 |
} |
| 190 |
if (funame != NULL) /* need to assign Dx, Dy, Dz? */ |
| 191 |
assignD = (fundefined(funame) < 6); |
| 192 |
val_last = (float *)calloc(sqres, sizeof(float)); |
| 193 |
if (funame == NULL) |
| 194 |
sdv_next = (SDValue *)malloc(sizeof(SDValue)*sqres); |
| 195 |
else |
| 196 |
val_next = (float *)malloc(sizeof(float)*sqres); |
| 197 |
/* run through directions */ |
| 198 |
for (ix = 0; ix < sqres/2; ix++) { |
| 199 |
const int zipsgn = (ix & 1)*2 - 1; |
| 200 |
RBFNODE *rbf = NULL; |
| 201 |
iovec[0] = 2.*sqfact*(ix+.5) - 1.; |
| 202 |
iovec[1] = zipsgn*sqfact*.5; |
| 203 |
iovec[2] = input_orient * sqrt(1. - iovec[0]*iovec[0] |
| 204 |
- iovec[1]*iovec[1]); |
| 205 |
if (funame == NULL) |
| 206 |
rbf = advect_rbf(iovec, lobe_lim); |
| 207 |
/* presample first row */ |
| 208 |
for (oy = 0; oy < sqres; oy++) { |
| 209 |
square2disk(iovec+3, .5*sqfact, (oy+.5)*sqfact); |
| 210 |
iovec[5] = output_orient * |
| 211 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
| 212 |
if (funame == NULL) { |
| 213 |
eval_rbfcol(&sdv_next[oy], rbf, iovec+3); |
| 214 |
} else { |
| 215 |
if (assignD) { |
| 216 |
varset("Dx", '=', -iovec[3]); |
| 217 |
varset("Dy", '=', -iovec[4]); |
| 218 |
varset("Dz", '=', -iovec[5]); |
| 219 |
++eclock; |
| 220 |
} |
| 221 |
val_next[oy] = funvalue(funame, 6, iovec); |
| 222 |
} |
| 223 |
} |
| 224 |
for (ox = 0; ox < sqres; ox++) { |
| 225 |
/* |
| 226 |
* Super-sample when we detect a difference from before |
| 227 |
* or after in this row, above or below. |
| 228 |
*/ |
| 229 |
for (oy = 0; oy < sqres; oy++) { |
| 230 |
if (ox < sqres-1) { /* keeping one row ahead... */ |
| 231 |
square2disk(iovec+3, (ox+1.5)*sqfact, (oy+.5)*sqfact); |
| 232 |
iovec[5] = output_orient * |
| 233 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
| 234 |
} |
| 235 |
if (funame == NULL) { |
| 236 |
SDValue sdv = sdv_next[oy]; |
| 237 |
bsdf = sdv.cieY; |
| 238 |
if (ox < sqres-1) |
| 239 |
eval_rbfcol(&sdv_next[oy], rbf, iovec+3); |
| 240 |
if (abs_diff(bsdf, sdv_next[oy].cieY) > ssamp_thresh || |
| 241 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) || |
| 242 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) || |
| 243 |
(oy < sqres-1 && |
| 244 |
abs_diff(bsdf, sdv_next[oy+1].cieY) > ssamp_thresh)) { |
| 245 |
int ssi; |
| 246 |
double ssa[2], sum = 0, usum = 0, vsum = 0; |
| 247 |
/* super-sample voxel */ |
| 248 |
for (ssi = nssamp; ssi--; ) { |
| 249 |
SDmultiSamp(ssa, 2, (ssi+frandom()) / |
| 250 |
(double)nssamp); |
| 251 |
square2disk(iovec+3, (ox+ssa[0])*sqfact, |
| 252 |
(oy+ssa[1])*sqfact); |
| 253 |
iovec[5] = output_orient * |
| 254 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
| 255 |
eval_rbfcol(&sdv, rbf, iovec+3); |
| 256 |
sum += sdv.cieY; |
| 257 |
if (rbf_colorimetry == RBCtristimulus) { |
| 258 |
sdv.cieY /= |
| 259 |
-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.; |
| 260 |
usum += 4.*sdv.spec.cx * sdv.cieY; |
| 261 |
vsum += 9.*sdv.spec.cy * sdv.cieY; |
| 262 |
} |
| 263 |
} |
| 264 |
bsdf = sum / (double)nssamp; |
| 265 |
if (rbf_colorimetry == RBCtristimulus) { |
| 266 |
uv[0] = usum / (sum+FTINY); |
| 267 |
uv[1] = vsum / (sum+FTINY); |
| 268 |
} |
| 269 |
} else if (rbf_colorimetry == RBCtristimulus) { |
| 270 |
uv[0] = uv[1] = 1. / |
| 271 |
(-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.); |
| 272 |
uv[0] *= 4.*sdv.spec.cx; |
| 273 |
uv[1] *= 9.*sdv.spec.cy; |
| 274 |
} |
| 275 |
} else { |
| 276 |
bsdf = val_next[oy]; |
| 277 |
if (ox < sqres-1) { |
| 278 |
if (assignD) { |
| 279 |
varset("Dx", '=', -iovec[3]); |
| 280 |
varset("Dy", '=', -iovec[4]); |
| 281 |
varset("Dz", '=', -iovec[5]); |
| 282 |
++eclock; |
| 283 |
} |
| 284 |
val_next[oy] = funvalue(funame, 6, iovec); |
| 285 |
} |
| 286 |
if (abs_diff(bsdf, val_next[oy]) > ssamp_thresh || |
| 287 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) || |
| 288 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) || |
| 289 |
(oy < sqres-1 && |
| 290 |
abs_diff(bsdf, val_next[oy+1]) > ssamp_thresh)) { |
| 291 |
int ssi; |
| 292 |
double ssa[4], ssvec[6], sum = 0; |
| 293 |
/* super-sample voxel */ |
| 294 |
for (ssi = nssamp; ssi--; ) { |
| 295 |
SDmultiSamp(ssa, 4, (ssi+frandom()) / |
| 296 |
(double)nssamp); |
| 297 |
ssvec[0] = 2.*sqfact*(ix+ssa[0]) - 1.; |
| 298 |
ssvec[1] = zipsgn*sqfact*ssa[1]; |
| 299 |
ssvec[2] = 1. - ssvec[0]*ssvec[0] |
| 300 |
- ssvec[1]*ssvec[1]; |
| 301 |
if (ssvec[2] < .0) { |
| 302 |
ssvec[1] = 0; |
| 303 |
ssvec[2] = 1. - ssvec[0]*ssvec[0]; |
| 304 |
} |
| 305 |
ssvec[2] = input_orient * sqrt(ssvec[2]); |
| 306 |
square2disk(ssvec+3, (ox+ssa[2])*sqfact, |
| 307 |
(oy+ssa[3])*sqfact); |
| 308 |
ssvec[5] = output_orient * |
| 309 |
sqrt(1. - ssvec[3]*ssvec[3] - |
| 310 |
ssvec[4]*ssvec[4]); |
| 311 |
if (assignD) { |
| 312 |
varset("Dx", '=', -ssvec[3]); |
| 313 |
varset("Dy", '=', -ssvec[4]); |
| 314 |
varset("Dz", '=', -ssvec[5]); |
| 315 |
++eclock; |
| 316 |
} |
| 317 |
sum += funvalue(funame, 6, ssvec); |
| 318 |
} |
| 319 |
bsdf = sum / (double)nssamp; |
| 320 |
} |
| 321 |
} |
| 322 |
if (pctcull >= 0) |
| 323 |
putbinary(&bsdf, sizeof(bsdf), 1, ofp); |
| 324 |
else |
| 325 |
fprintf(ofp, "\t%.3e\n", bsdf); |
| 326 |
|
| 327 |
if (rbf_colorimetry == RBCtristimulus) { |
| 328 |
if (pctcull >= 0) { |
| 329 |
putbinary(&uv[0], sizeof(*uv), 1, uvfp[0]); |
| 330 |
putbinary(&uv[1], sizeof(*uv), 1, uvfp[1]); |
| 331 |
} else { |
| 332 |
fprintf(uvfp[0], "\t%.3e\n", uv[0]); |
| 333 |
fprintf(uvfp[1], "\t%.3e\n", uv[1]); |
| 334 |
} |
| 335 |
} |
| 336 |
if (val_last != NULL) |
| 337 |
val_last[oy] = bsdf; |
| 338 |
} |
| 339 |
} |
| 340 |
if (rbf != NULL) |
| 341 |
free(rbf); |
| 342 |
prog_show((ix+1.)*(2.*sqfact)); |
| 343 |
} |
| 344 |
prog_done(); |
| 345 |
if (val_last != NULL) { |
| 346 |
free(val_last); |
| 347 |
if (val_next != NULL) free(val_next); |
| 348 |
if (sdv_next != NULL) free(sdv_next); |
| 349 |
} |
| 350 |
if (pctcull >= 0) { /* finish output */ |
| 351 |
if (pclose(ofp)) { |
| 352 |
fprintf(stderr, "%s: error running rttree_reduce on Y\n", |
| 353 |
progname); |
| 354 |
exit(1); |
| 355 |
} |
| 356 |
if (rbf_colorimetry == RBCtristimulus && |
| 357 |
(pclose(uvfp[0]) || pclose(uvfp[1]))) { |
| 358 |
fprintf(stderr, "%s: error running rttree_reduce on uv\n", |
| 359 |
progname); |
| 360 |
exit(1); |
| 361 |
} |
| 362 |
} else { |
| 363 |
for (ix = sqres*sqres*sqres/2; ix--; ) |
| 364 |
fputs("\t0\n", ofp); |
| 365 |
fputs("}\n", ofp); |
| 366 |
if (fclose(ofp)) { |
| 367 |
fprintf(stderr, "%s: error writing Y file\n", |
| 368 |
progname); |
| 369 |
exit(1); |
| 370 |
} |
| 371 |
if (rbf_colorimetry == RBCtristimulus) { |
| 372 |
for (ix = sqres*sqres*sqres/2; ix--; ) { |
| 373 |
fputs("\t0\n", uvfp[0]); |
| 374 |
fputs("\t0\n", uvfp[1]); |
| 375 |
} |
| 376 |
fputs("}\n", uvfp[0]); |
| 377 |
fputs("}\n", uvfp[1]); |
| 378 |
if (fclose(uvfp[0]) || fclose(uvfp[1])) { |
| 379 |
fprintf(stderr, "%s: error writing uv file(s)\n", |
| 380 |
progname); |
| 381 |
exit(1); |
| 382 |
} |
| 383 |
} |
| 384 |
} |
| 385 |
} |
| 386 |
|
| 387 |
/* Interpolate and output anisotropic BSDF data */ |
| 388 |
static void |
| 389 |
eval_anisotropic(char *funame) |
| 390 |
{ |
| 391 |
const int sqres = 1<<samp_order; |
| 392 |
const double sqfact = 1./(double)sqres; |
| 393 |
float *val_last = NULL; |
| 394 |
float *val_next = NULL; |
| 395 |
SDValue *sdv_next = NULL; |
| 396 |
FILE *ofp, *uvfp[2]; |
| 397 |
int assignD = 0; |
| 398 |
char cmd[128]; |
| 399 |
int ix, iy, ox, oy; |
| 400 |
RREAL iovec[6]; |
| 401 |
float bsdf, uv[2]; |
| 402 |
|
| 403 |
if (pctcull >= 0) { |
| 404 |
const char *avgopt = (input_orient>0 ^ output_orient>0) |
| 405 |
? "" : recip; |
| 406 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s", |
| 407 |
avgopt, pctcull, samp_order, |
| 408 |
create_component_file(0)); |
| 409 |
ofp = popen(cmd, "w"); |
| 410 |
if (ofp == NULL) { |
| 411 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n", |
| 412 |
progname); |
| 413 |
exit(1); |
| 414 |
} |
| 415 |
SET_FILE_BINARY(ofp); |
| 416 |
#ifdef getc_unlocked /* avoid lock/unlock overhead */ |
| 417 |
flockfile(ofp); |
| 418 |
#endif |
| 419 |
if (rbf_colorimetry == RBCtristimulus) { |
| 420 |
double uvcull = 100. - (100.-pctcull)*.25; |
| 421 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s", |
| 422 |
avgopt, uvcull, samp_order, |
| 423 |
create_component_file(1)); |
| 424 |
uvfp[0] = popen(cmd, "w"); |
| 425 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s", |
| 426 |
avgopt, uvcull, samp_order, |
| 427 |
create_component_file(2)); |
| 428 |
uvfp[1] = popen(cmd, "w"); |
| 429 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) { |
| 430 |
fprintf(stderr, "%s: cannot open pipes to uv output\n", |
| 431 |
progname); |
| 432 |
exit(1); |
| 433 |
} |
| 434 |
SET_FILE_BINARY(uvfp[0]); SET_FILE_BINARY(uvfp[1]); |
| 435 |
#ifdef getc_unlocked |
| 436 |
flockfile(uvfp[0]); flockfile(uvfp[1]); |
| 437 |
#endif |
| 438 |
} |
| 439 |
} else { |
| 440 |
ofp = fopen(create_component_file(0), "w"); |
| 441 |
if (ofp == NULL) { |
| 442 |
fprintf(stderr, "%s: cannot create Y output file\n", |
| 443 |
progname); |
| 444 |
exit(1); |
| 445 |
} |
| 446 |
fputs("{\n", ofp); |
| 447 |
if (rbf_colorimetry == RBCtristimulus) { |
| 448 |
uvfp[0] = fopen(create_component_file(1), "w"); |
| 449 |
uvfp[1] = fopen(create_component_file(2), "w"); |
| 450 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) { |
| 451 |
fprintf(stderr, "%s: cannot create uv output file(s)\n", |
| 452 |
progname); |
| 453 |
exit(1); |
| 454 |
} |
| 455 |
fputs("{\n", uvfp[0]); |
| 456 |
fputs("{\n", uvfp[1]); |
| 457 |
} |
| 458 |
} |
| 459 |
if (funame != NULL) /* need to assign Dx, Dy, Dz? */ |
| 460 |
assignD = (fundefined(funame) < 6); |
| 461 |
val_last = (float *)calloc(sqres, sizeof(float)); |
| 462 |
if (funame == NULL) |
| 463 |
sdv_next = (SDValue *)malloc(sizeof(SDValue)*sqres); |
| 464 |
else |
| 465 |
val_next = (float *)malloc(sizeof(float)*sqres); |
| 466 |
/* run through directions */ |
| 467 |
for (ix = 0; ix < sqres; ix++) |
| 468 |
for (iy = 0; iy < sqres; iy++) { |
| 469 |
RBFNODE *rbf = NULL; /* Klems reversal */ |
| 470 |
square2disk(iovec, 1.-(ix+.5)*sqfact, 1.-(iy+.5)*sqfact); |
| 471 |
iovec[2] = input_orient * |
| 472 |
sqrt(1. - iovec[0]*iovec[0] - iovec[1]*iovec[1]); |
| 473 |
if (funame == NULL) |
| 474 |
rbf = advect_rbf(iovec, lobe_lim); |
| 475 |
/* presample first row */ |
| 476 |
for (oy = 0; oy < sqres; oy++) { |
| 477 |
square2disk(iovec+3, .5*sqfact, (oy+.5)*sqfact); |
| 478 |
iovec[5] = output_orient * |
| 479 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
| 480 |
if (funame == NULL) { |
| 481 |
eval_rbfcol(&sdv_next[oy], rbf, iovec+3); |
| 482 |
} else { |
| 483 |
if (assignD) { |
| 484 |
varset("Dx", '=', -iovec[3]); |
| 485 |
varset("Dy", '=', -iovec[4]); |
| 486 |
varset("Dz", '=', -iovec[5]); |
| 487 |
++eclock; |
| 488 |
} |
| 489 |
val_next[oy] = funvalue(funame, 6, iovec); |
| 490 |
} |
| 491 |
} |
| 492 |
for (ox = 0; ox < sqres; ox++) { |
| 493 |
/* |
| 494 |
* Super-sample when we detect a difference from before |
| 495 |
* or after in this row, above or below. |
| 496 |
*/ |
| 497 |
for (oy = 0; oy < sqres; oy++) { |
| 498 |
if (ox < sqres-1) { /* keeping one row ahead... */ |
| 499 |
square2disk(iovec+3, (ox+1.5)*sqfact, (oy+.5)*sqfact); |
| 500 |
iovec[5] = output_orient * |
| 501 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
| 502 |
} |
| 503 |
if (funame == NULL) { |
| 504 |
SDValue sdv = sdv_next[oy]; |
| 505 |
bsdf = sdv.cieY; |
| 506 |
if (ox < sqres-1) |
| 507 |
eval_rbfcol(&sdv_next[oy], rbf, iovec+3); |
| 508 |
if (abs_diff(bsdf, sdv_next[oy].cieY) > ssamp_thresh || |
| 509 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) || |
| 510 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) || |
| 511 |
(oy < sqres-1 && |
| 512 |
abs_diff(bsdf, sdv_next[oy+1].cieY) > ssamp_thresh)) { |
| 513 |
int ssi; |
| 514 |
double ssa[2], sum = 0, usum = 0, vsum = 0; |
| 515 |
/* super-sample voxel */ |
| 516 |
for (ssi = nssamp; ssi--; ) { |
| 517 |
SDmultiSamp(ssa, 2, (ssi+frandom()) / |
| 518 |
(double)nssamp); |
| 519 |
square2disk(iovec+3, (ox+ssa[0])*sqfact, |
| 520 |
(oy+ssa[1])*sqfact); |
| 521 |
iovec[5] = output_orient * |
| 522 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
| 523 |
eval_rbfcol(&sdv, rbf, iovec+3); |
| 524 |
sum += sdv.cieY; |
| 525 |
if (rbf_colorimetry == RBCtristimulus) { |
| 526 |
sdv.cieY /= |
| 527 |
-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.; |
| 528 |
usum += 4.*sdv.spec.cx * sdv.cieY; |
| 529 |
vsum += 9.*sdv.spec.cy * sdv.cieY; |
| 530 |
} |
| 531 |
} |
| 532 |
bsdf = sum / (double)nssamp; |
| 533 |
if (rbf_colorimetry == RBCtristimulus) { |
| 534 |
uv[0] = usum / (sum+FTINY); |
| 535 |
uv[1] = vsum / (sum+FTINY); |
| 536 |
} |
| 537 |
} else if (rbf_colorimetry == RBCtristimulus) { |
| 538 |
uv[0] = uv[1] = 1. / |
| 539 |
(-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.); |
| 540 |
uv[0] *= 4.*sdv.spec.cx; |
| 541 |
uv[1] *= 9.*sdv.spec.cy; |
| 542 |
} |
| 543 |
} else { |
| 544 |
bsdf = val_next[oy]; |
| 545 |
if (ox < sqres-1) { |
| 546 |
if (assignD) { |
| 547 |
varset("Dx", '=', -iovec[3]); |
| 548 |
varset("Dy", '=', -iovec[4]); |
| 549 |
varset("Dz", '=', -iovec[5]); |
| 550 |
++eclock; |
| 551 |
} |
| 552 |
val_next[oy] = funvalue(funame, 6, iovec); |
| 553 |
} |
| 554 |
if (abs_diff(bsdf, val_next[oy]) > ssamp_thresh || |
| 555 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) || |
| 556 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) || |
| 557 |
(oy < sqres-1 && |
| 558 |
abs_diff(bsdf, val_next[oy+1]) > ssamp_thresh)) { |
| 559 |
int ssi; |
| 560 |
double ssa[4], ssvec[6], sum = 0; |
| 561 |
/* super-sample voxel */ |
| 562 |
for (ssi = nssamp; ssi--; ) { |
| 563 |
SDmultiSamp(ssa, 4, (ssi+frandom()) / |
| 564 |
(double)nssamp); |
| 565 |
square2disk(ssvec, 1.-(ix+ssa[0])*sqfact, |
| 566 |
1.-(iy+ssa[1])*sqfact); |
| 567 |
ssvec[2] = input_orient * |
| 568 |
sqrt(1. - ssvec[0]*ssvec[0] - |
| 569 |
ssvec[1]*ssvec[1]); |
| 570 |
square2disk(ssvec+3, (ox+ssa[2])*sqfact, |
| 571 |
(oy+ssa[3])*sqfact); |
| 572 |
ssvec[5] = output_orient * |
| 573 |
sqrt(1. - ssvec[3]*ssvec[3] - |
| 574 |
ssvec[4]*ssvec[4]); |
| 575 |
if (assignD) { |
| 576 |
varset("Dx", '=', -ssvec[3]); |
| 577 |
varset("Dy", '=', -ssvec[4]); |
| 578 |
varset("Dz", '=', -ssvec[5]); |
| 579 |
++eclock; |
| 580 |
} |
| 581 |
sum += funvalue(funame, 6, ssvec); |
| 582 |
} |
| 583 |
bsdf = sum / (double)nssamp; |
| 584 |
} |
| 585 |
} |
| 586 |
if (pctcull >= 0) |
| 587 |
putbinary(&bsdf, sizeof(bsdf), 1, ofp); |
| 588 |
else |
| 589 |
fprintf(ofp, "\t%.3e\n", bsdf); |
| 590 |
|
| 591 |
if (rbf_colorimetry == RBCtristimulus) { |
| 592 |
if (pctcull >= 0) { |
| 593 |
putbinary(&uv[0], sizeof(*uv), 1, uvfp[0]); |
| 594 |
putbinary(&uv[1], sizeof(*uv), 1, uvfp[1]); |
| 595 |
} else { |
| 596 |
fprintf(uvfp[0], "\t%.3e\n", uv[0]); |
| 597 |
fprintf(uvfp[1], "\t%.3e\n", uv[1]); |
| 598 |
} |
| 599 |
} |
| 600 |
if (val_last != NULL) |
| 601 |
val_last[oy] = bsdf; |
| 602 |
} |
| 603 |
} |
| 604 |
if (rbf != NULL) |
| 605 |
free(rbf); |
| 606 |
prog_show((ix*sqres+iy+1.)/(sqres*sqres)); |
| 607 |
} |
| 608 |
prog_done(); |
| 609 |
if (val_last != NULL) { |
| 610 |
free(val_last); |
| 611 |
if (val_next != NULL) free(val_next); |
| 612 |
if (sdv_next != NULL) free(sdv_next); |
| 613 |
} |
| 614 |
if (pctcull >= 0) { /* finish output */ |
| 615 |
if (pclose(ofp)) { |
| 616 |
fprintf(stderr, "%s: error running rttree_reduce on Y\n", |
| 617 |
progname); |
| 618 |
exit(1); |
| 619 |
} |
| 620 |
if (rbf_colorimetry == RBCtristimulus && |
| 621 |
(pclose(uvfp[0]) || pclose(uvfp[1]))) { |
| 622 |
fprintf(stderr, "%s: error running rttree_reduce on uv\n", |
| 623 |
progname); |
| 624 |
exit(1); |
| 625 |
} |
| 626 |
} else { |
| 627 |
fputs("}\n", ofp); |
| 628 |
if (fclose(ofp)) { |
| 629 |
fprintf(stderr, "%s: error writing Y file\n", |
| 630 |
progname); |
| 631 |
exit(1); |
| 632 |
} |
| 633 |
if (rbf_colorimetry == RBCtristimulus) { |
| 634 |
fputs("}\n", uvfp[0]); |
| 635 |
fputs("}\n", uvfp[1]); |
| 636 |
if (fclose(uvfp[0]) || fclose(uvfp[1])) { |
| 637 |
fprintf(stderr, "%s: error writing uv file(s)\n", |
| 638 |
progname); |
| 639 |
exit(1); |
| 640 |
} |
| 641 |
} |
| 642 |
} |
| 643 |
} |
| 644 |
|
| 645 |
#if defined(_WIN32) || defined(_WIN64) |
| 646 |
/* Execute wrapBSDF command (may never return) */ |
| 647 |
static int |
| 648 |
wrap_up(void) |
| 649 |
{ |
| 650 |
char cmd[32700]; |
| 651 |
|
| 652 |
if (bsdf_manuf[0]) { |
| 653 |
add_wbsdf("-f", 1); |
| 654 |
strcpy(cmd, "m="); |
| 655 |
strcpy(cmd+2, bsdf_manuf); |
| 656 |
add_wbsdf(cmd, 0); |
| 657 |
} |
| 658 |
if (bsdf_name[0]) { |
| 659 |
add_wbsdf("-f", 1); |
| 660 |
strcpy(cmd, "n="); |
| 661 |
strcpy(cmd+2, bsdf_name); |
| 662 |
add_wbsdf(cmd, 0); |
| 663 |
} |
| 664 |
if (!convert_commandline(cmd, sizeof(cmd), wrapBSDF)) { |
| 665 |
fputs(progname, stderr); |
| 666 |
fputs(": command line too long in wrap_up()\n", stderr); |
| 667 |
return(1); |
| 668 |
} |
| 669 |
return(system(cmd)); |
| 670 |
} |
| 671 |
#else |
| 672 |
/* Execute wrapBSDF command (may never return) */ |
| 673 |
static int |
| 674 |
wrap_up(void) |
| 675 |
{ |
| 676 |
char buf[256]; |
| 677 |
char *compath = getpath((char *)wrapBSDF[0], getenv("PATH"), X_OK); |
| 678 |
|
| 679 |
if (compath == NULL) { |
| 680 |
fprintf(stderr, "%s: cannot locate %s\n", progname, wrapBSDF[0]); |
| 681 |
return(1); |
| 682 |
} |
| 683 |
if (bsdf_manuf[0]) { |
| 684 |
add_wbsdf("-f", 1); |
| 685 |
strcpy(buf, "m="); |
| 686 |
strcpy(buf+2, bsdf_manuf); |
| 687 |
add_wbsdf(buf, 0); |
| 688 |
} |
| 689 |
if (bsdf_name[0]) { |
| 690 |
add_wbsdf("-f", 1); |
| 691 |
strcpy(buf, "n="); |
| 692 |
strcpy(buf+2, bsdf_name); |
| 693 |
add_wbsdf(buf, 0); |
| 694 |
} |
| 695 |
execv(compath, wrapBSDF); /* successful call never returns */ |
| 696 |
perror(compath); |
| 697 |
return(1); |
| 698 |
} |
| 699 |
#endif |
| 700 |
|
| 701 |
#define HEAD_BUFLEN 10240 |
| 702 |
static char head_buf[HEAD_BUFLEN]; |
| 703 |
static int cur_headlen = 0; |
| 704 |
|
| 705 |
/* Record header line as comment associated with this SIR input */ |
| 706 |
static int |
| 707 |
record2header(char *s) |
| 708 |
{ |
| 709 |
int len = strlen(s); |
| 710 |
|
| 711 |
if (cur_headlen+len >= HEAD_BUFLEN-6) |
| 712 |
return(0); |
| 713 |
/* includes EOL */ |
| 714 |
strcpy(head_buf+cur_headlen, s); |
| 715 |
cur_headlen += len; |
| 716 |
|
| 717 |
#if defined(_WIN32) || defined(_WIN64) |
| 718 |
if (head_buf[cur_headlen-1] == '\n') |
| 719 |
head_buf[cur_headlen-1] = '\t'; |
| 720 |
#endif |
| 721 |
return(1); |
| 722 |
} |
| 723 |
|
| 724 |
/* Finish off header for this file */ |
| 725 |
static void |
| 726 |
done_header(void) |
| 727 |
{ |
| 728 |
while (cur_headlen > 0 && isspace(head_buf[cur_headlen-1])) |
| 729 |
--cur_headlen; |
| 730 |
head_buf[cur_headlen] = '\0'; |
| 731 |
if (!cur_headlen) |
| 732 |
return; |
| 733 |
add_wbsdf("-C", 1); |
| 734 |
add_wbsdf(head_buf, 0); |
| 735 |
head_buf[cur_headlen=0] = '\0'; |
| 736 |
} |
| 737 |
|
| 738 |
/* Read in BSDF and interpolate as tensor tree representation */ |
| 739 |
int |
| 740 |
main(int argc, char *argv[]) |
| 741 |
{ |
| 742 |
static const char tfmt[2][4] = {"t4", "t3"}; |
| 743 |
int dofwd = 0, dobwd = 1; |
| 744 |
int nsirs = 0; |
| 745 |
char buf[1024]; |
| 746 |
int i; |
| 747 |
/* set global progname */ |
| 748 |
fixargv0(argv[0]); |
| 749 |
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
| 750 |
esupport &= ~(E_INCHAN|E_OUTCHAN); |
| 751 |
scompile("PI:3.14159265358979323846", NULL, 0); |
| 752 |
biggerlib(); |
| 753 |
strcpy(buf, "File produced by: "); |
| 754 |
if (convert_commandline(buf+18, sizeof(buf)-18, argv) != NULL) { |
| 755 |
add_wbsdf("-C", 1); add_wbsdf(buf, 0); |
| 756 |
} |
| 757 |
for (i = 1; i < argc; i++) |
| 758 |
if ((argv[i][0] == '-') | (argv[i][0] == '+')) { |
| 759 |
switch (argv[i][1]) { /* get option */ |
| 760 |
case 'e': |
| 761 |
scompile(argv[++i], NULL, 0); |
| 762 |
if (single_plane_incident < 0) |
| 763 |
single_plane_incident = 0; |
| 764 |
break; |
| 765 |
case 'f': |
| 766 |
if ((argv[i][0] == '-') & !argv[i][2]) { |
| 767 |
if (strchr(argv[++i], '=') != NULL) { |
| 768 |
add_wbsdf("-f", 1); |
| 769 |
add_wbsdf(argv[i], 1); |
| 770 |
} else { |
| 771 |
char *fpath = getpath(argv[i], |
| 772 |
getrlibpath(), 0); |
| 773 |
if (fpath == NULL) { |
| 774 |
fprintf(stderr, |
| 775 |
"%s: cannot find file '%s'\n", |
| 776 |
argv[0], argv[i]); |
| 777 |
return(1); |
| 778 |
} |
| 779 |
fcompile(fpath); |
| 780 |
if (single_plane_incident < 0) |
| 781 |
single_plane_incident = 0; |
| 782 |
} |
| 783 |
} else |
| 784 |
dofwd = (argv[i][0] == '+'); |
| 785 |
break; |
| 786 |
case 'a': |
| 787 |
recip = (argv[i][0] == '+') ? " -a" : ""; |
| 788 |
break; |
| 789 |
case 'b': |
| 790 |
dobwd = (argv[i][0] == '+'); |
| 791 |
break; |
| 792 |
case 'n': |
| 793 |
nssamp = atoi(argv[++i]); |
| 794 |
if (nssamp <= 0) |
| 795 |
goto userr; |
| 796 |
break; |
| 797 |
case 's': |
| 798 |
ssamp_thresh = atof(argv[++i]); |
| 799 |
if (ssamp_thresh <= FTINY) |
| 800 |
goto userr; |
| 801 |
break; |
| 802 |
case 't': |
| 803 |
switch (argv[i][2]) { |
| 804 |
case '3': |
| 805 |
single_plane_incident = 1; |
| 806 |
break; |
| 807 |
case '4': |
| 808 |
single_plane_incident = 0; |
| 809 |
break; |
| 810 |
case '\0': |
| 811 |
pctcull = atof(argv[++i]); |
| 812 |
break; |
| 813 |
default: |
| 814 |
goto userr; |
| 815 |
} |
| 816 |
break; |
| 817 |
case 'g': |
| 818 |
samp_order = atoi(argv[++i]); |
| 819 |
break; |
| 820 |
case 'l': |
| 821 |
lobe_lim = atoi(argv[++i]); |
| 822 |
break; |
| 823 |
case 'p': |
| 824 |
do_prog = atoi(argv[i]+2); |
| 825 |
break; |
| 826 |
case 'W': |
| 827 |
add_wbsdf(argv[i], 1); |
| 828 |
break; |
| 829 |
case 'u': |
| 830 |
case 'C': |
| 831 |
add_wbsdf(argv[i], 1); |
| 832 |
add_wbsdf(argv[++i], 1); |
| 833 |
break; |
| 834 |
default: |
| 835 |
goto userr; |
| 836 |
} |
| 837 |
} else { /* input SIR or function */ |
| 838 |
FILE *fpin; |
| 839 |
if (!nsirs & (single_plane_incident >= 0)) |
| 840 |
break; /* must be a function */ |
| 841 |
if (nsirs >= 4) { |
| 842 |
fprintf(stderr, "At most 4 SIR inputs supported\n"); |
| 843 |
goto userr; |
| 844 |
} |
| 845 |
fpin = fopen(argv[i], "rb"); /* open SIR file */ |
| 846 |
if (fpin == NULL) { |
| 847 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
| 848 |
progname, argv[i]); |
| 849 |
return(1); |
| 850 |
} |
| 851 |
sprintf(buf, "%s:\n", argv[i]); |
| 852 |
record2header(buf); |
| 853 |
sir_headshare = &record2header; |
| 854 |
if (!load_bsdf_rep(fpin)) |
| 855 |
return(1); |
| 856 |
fclose(fpin); |
| 857 |
done_header(); |
| 858 |
sprintf(buf, "Interpolating component '%s'", argv[i]); |
| 859 |
prog_start(buf); |
| 860 |
if (!nsirs++) { |
| 861 |
add_wbsdf("-a", 1); |
| 862 |
add_wbsdf(tfmt[single_plane_incident], 1); |
| 863 |
} |
| 864 |
if (single_plane_incident) |
| 865 |
eval_isotropic(NULL); |
| 866 |
else |
| 867 |
eval_anisotropic(NULL); |
| 868 |
} |
| 869 |
if (i < argc) { /* function-based BSDF? */ |
| 870 |
void (*evf)(char *s) = single_plane_incident ? |
| 871 |
eval_isotropic : eval_anisotropic; |
| 872 |
if (i != argc-1 || fundefined(argv[i]) < 3) { |
| 873 |
fprintf(stderr, |
| 874 |
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
| 875 |
progname); |
| 876 |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n"); |
| 877 |
goto userr; |
| 878 |
} |
| 879 |
doptimize(1); /* optimize definitions */ |
| 880 |
++eclock; |
| 881 |
add_wbsdf("-a", 1); |
| 882 |
add_wbsdf(tfmt[single_plane_incident], 1); |
| 883 |
if (dofwd) { |
| 884 |
input_orient = -1; |
| 885 |
output_orient = -1; |
| 886 |
prog_start("Evaluating outside reflectance"); |
| 887 |
(*evf)(argv[i]); |
| 888 |
output_orient = 1; |
| 889 |
prog_start("Evaluating outside->inside transmission"); |
| 890 |
(*evf)(argv[i]); |
| 891 |
} |
| 892 |
if (dobwd) { |
| 893 |
input_orient = 1; |
| 894 |
output_orient = 1; |
| 895 |
prog_start("Evaluating inside reflectance"); |
| 896 |
(*evf)(argv[i]); |
| 897 |
output_orient = -1; |
| 898 |
prog_start("Evaluating inside->outside transmission"); |
| 899 |
(*evf)(argv[i]); |
| 900 |
} |
| 901 |
} else if (!nsirs) { /* else load SIR from stdin? */ |
| 902 |
record2header("<stdin>:\n"); |
| 903 |
sir_headshare = &record2header; |
| 904 |
if (!load_bsdf_rep(stdin)) |
| 905 |
return(1); |
| 906 |
done_header(); |
| 907 |
prog_start("Interpolating from standard input"); |
| 908 |
add_wbsdf("-a", 1); |
| 909 |
add_wbsdf(tfmt[single_plane_incident], 1); |
| 910 |
if (single_plane_incident) /* resample dist. */ |
| 911 |
eval_isotropic(NULL); |
| 912 |
else |
| 913 |
eval_anisotropic(NULL); |
| 914 |
} |
| 915 |
return(wrap_up()); /* call wrapBSDF */ |
| 916 |
userr: |
| 917 |
fprintf(stderr, |
| 918 |
"Usage: %s [{+|-}a][-g Nlog2][-t pctcull][-n nss][-s thresh][-l maxlobes][bsdf.sir ..] > bsdf.xml\n", |
| 919 |
progname); |
| 920 |
fprintf(stderr, |
| 921 |
" or: %s -t{3|4} [{+|-}a][-g Nlog2][-t pctcull][-n nss][-s thresh][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n", |
| 922 |
progname); |
| 923 |
return(1); |
| 924 |
} |
