| 1 |
#ifndef lint
|
| 2 |
static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.29 2014/08/21 10:33:48 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 <stdio.h>
|
| 12 |
#include <stdlib.h>
|
| 13 |
#include <math.h>
|
| 14 |
#include "random.h"
|
| 15 |
#include "platform.h"
|
| 16 |
#include "rtprocess.h"
|
| 17 |
#include "calcomp.h"
|
| 18 |
#include "bsdfrep.h"
|
| 19 |
/* global argv[0] */
|
| 20 |
char *progname;
|
| 21 |
/* percentage to cull (<0 to turn off) */
|
| 22 |
double pctcull = 90.;
|
| 23 |
/* sampling order */
|
| 24 |
int samp_order = 6;
|
| 25 |
/* super-sampling threshold */
|
| 26 |
const double ssamp_thresh = 0.35;
|
| 27 |
/* number of super-samples */
|
| 28 |
#ifndef NSSAMP
|
| 29 |
#define NSSAMP 100
|
| 30 |
#endif
|
| 31 |
/* limit on number of RBF lobes */
|
| 32 |
static int lobe_lim = 15000;
|
| 33 |
/* progress bar length */
|
| 34 |
static int do_prog = 79;
|
| 35 |
|
| 36 |
|
| 37 |
/* Start new progress bar */
|
| 38 |
#define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else
|
| 39 |
|
| 40 |
/* Draw progress bar of the appropriate length */
|
| 41 |
static void
|
| 42 |
prog_show(double frac)
|
| 43 |
{
|
| 44 |
static unsigned call_cnt = 0;
|
| 45 |
static char lastc[] = "-\\|/";
|
| 46 |
char pbar[256];
|
| 47 |
int nchars;
|
| 48 |
|
| 49 |
if (do_prog <= 1) return;
|
| 50 |
if (do_prog > sizeof(pbar)-2)
|
| 51 |
do_prog = sizeof(pbar)-2;
|
| 52 |
if (frac < 0) frac = 0;
|
| 53 |
else if (frac >= 1) frac = .9999;
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| 54 |
nchars = do_prog*frac;
|
| 55 |
pbar[0] = '\r';
|
| 56 |
memset(pbar+1, '*', nchars);
|
| 57 |
pbar[nchars+1] = lastc[call_cnt++ & 3];
|
| 58 |
memset(pbar+2+nchars, '-', do_prog-nchars-1);
|
| 59 |
pbar[do_prog+1] = '\0';
|
| 60 |
fputs(pbar, stderr);
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| 61 |
}
|
| 62 |
|
| 63 |
/* Finish progress bar */
|
| 64 |
static void
|
| 65 |
prog_done(void)
|
| 66 |
{
|
| 67 |
int n = do_prog;
|
| 68 |
|
| 69 |
if (n <= 1) return;
|
| 70 |
fputc('\r', stderr);
|
| 71 |
while (n--)
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| 72 |
fputc(' ', stderr);
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| 73 |
fputc('\r', stderr);
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| 74 |
}
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| 75 |
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| 76 |
/* Output XML prologue to stdout */
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| 77 |
static void
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| 78 |
xml_prologue(int ac, char *av[])
|
| 79 |
{
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| 80 |
puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
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| 81 |
puts("<WindowElement xmlns=\"http://windows.lbl.gov\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://windows.lbl.gov/BSDF-v1.4.xsd\">");
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| 82 |
fputs("<!-- File produced by:", stdout);
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| 83 |
while (ac-- > 0) {
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| 84 |
fputc(' ', stdout);
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| 85 |
fputs(*av++, stdout);
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| 86 |
}
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| 87 |
puts(" -->");
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| 88 |
puts("<WindowElementType>System</WindowElementType>");
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| 89 |
puts("<FileType>BSDF</FileType>");
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| 90 |
puts("<Optical>");
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| 91 |
puts("<Layer>");
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| 92 |
puts("\t<Material>");
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| 93 |
printf("\t\t<Name>%s</Name>\n", bsdf_name[0] ? bsdf_name : "Unknown");
|
| 94 |
printf("\t\t<Manufacturer>%s</Manufacturer>\n",
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| 95 |
bsdf_manuf[0] ? bsdf_manuf : "Unknown");
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| 96 |
puts("\t\t<DeviceType>Other</DeviceType>");
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| 97 |
puts("\t</Material>");
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| 98 |
puts("\t<DataDefinition>");
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| 99 |
printf("\t\t<IncidentDataStructure>TensorTree%c</IncidentDataStructure>\n",
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| 100 |
single_plane_incident ? '3' : '4');
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| 101 |
puts("\t</DataDefinition>");
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| 102 |
}
|
| 103 |
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| 104 |
/* Output XML data prologue to stdout */
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| 105 |
static void
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| 106 |
data_prologue()
|
| 107 |
{
|
| 108 |
static const char *bsdf_type[4] = {
|
| 109 |
"Reflection Front",
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| 110 |
"Transmission Front",
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| 111 |
"Transmission Back",
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| 112 |
"Reflection Back"
|
| 113 |
};
|
| 114 |
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| 115 |
puts("\t<WavelengthData>");
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| 116 |
puts("\t\t<LayerNumber>System</LayerNumber>");
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| 117 |
puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
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| 118 |
puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
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| 119 |
puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
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| 120 |
puts("\t\t<WavelengthDataBlock>");
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| 121 |
printf("\t\t\t<WavelengthDataDirection>%s</WavelengthDataDirection>\n",
|
| 122 |
bsdf_type[(input_orient>0)<<1 | (output_orient>0)]);
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| 123 |
puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
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| 124 |
puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
|
| 125 |
puts("\t\t\t<ScatteringData>");
|
| 126 |
}
|
| 127 |
|
| 128 |
/* Output XML data epilogue to stdout */
|
| 129 |
static void
|
| 130 |
data_epilogue(void)
|
| 131 |
{
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| 132 |
puts("\t\t\t</ScatteringData>");
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| 133 |
puts("\t\t</WavelengthDataBlock>");
|
| 134 |
puts("\t</WavelengthData>");
|
| 135 |
}
|
| 136 |
|
| 137 |
/* Output XML epilogue to stdout */
|
| 138 |
static void
|
| 139 |
xml_epilogue(void)
|
| 140 |
{
|
| 141 |
puts("</Layer>");
|
| 142 |
puts("</Optical>");
|
| 143 |
puts("</WindowElement>");
|
| 144 |
}
|
| 145 |
|
| 146 |
/* Compute absolute relative difference */
|
| 147 |
static double
|
| 148 |
abs_diff(double v1, double v0)
|
| 149 |
{
|
| 150 |
if ((v0 < 0) | (v1 < 0))
|
| 151 |
return(.0);
|
| 152 |
v1 = (v1-v0)*2./(v0+v1+.0001);
|
| 153 |
if (v1 < 0)
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| 154 |
return(-v1);
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| 155 |
return(v1);
|
| 156 |
}
|
| 157 |
|
| 158 |
/* Interpolate and output isotropic BSDF data */
|
| 159 |
static void
|
| 160 |
eval_isotropic(char *funame)
|
| 161 |
{
|
| 162 |
const int sqres = 1<<samp_order;
|
| 163 |
FILE *ofp = NULL;
|
| 164 |
int assignD = 0;
|
| 165 |
char cmd[128];
|
| 166 |
int ix, ox, oy;
|
| 167 |
double iovec[6];
|
| 168 |
float bsdf;
|
| 169 |
|
| 170 |
data_prologue(); /* begin output */
|
| 171 |
if (pctcull >= 0) {
|
| 172 |
sprintf(cmd, "rttree_reduce -a -h -ff -r 3 -t %f -g %d",
|
| 173 |
pctcull, samp_order);
|
| 174 |
fflush(stdout);
|
| 175 |
ofp = popen(cmd, "w");
|
| 176 |
if (ofp == NULL) {
|
| 177 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
|
| 178 |
progname);
|
| 179 |
exit(1);
|
| 180 |
}
|
| 181 |
SET_FILE_BINARY(ofp);
|
| 182 |
#ifdef getc_unlocked /* avoid lock/unlock overhead */
|
| 183 |
flockfile(ofp);
|
| 184 |
#endif
|
| 185 |
} else
|
| 186 |
fputs("{\n", stdout);
|
| 187 |
/* need to assign Dx, Dy, Dz? */
|
| 188 |
if (funame != NULL)
|
| 189 |
assignD = (fundefined(funame) < 6);
|
| 190 |
/* run through directions */
|
| 191 |
for (ix = 0; ix < sqres/2; ix++) {
|
| 192 |
RBFNODE *rbf = NULL;
|
| 193 |
iovec[0] = 2.*(ix+.5)/sqres - 1.;
|
| 194 |
iovec[1] = .0;
|
| 195 |
iovec[2] = input_orient * sqrt(1. - iovec[0]*iovec[0]);
|
| 196 |
if (funame == NULL)
|
| 197 |
rbf = advect_rbf(iovec, lobe_lim);
|
| 198 |
for (ox = 0; ox < sqres; ox++) {
|
| 199 |
float last_bsdf = -1;
|
| 200 |
for (oy = 0; oy < sqres; oy++) {
|
| 201 |
SDsquare2disk(iovec+3, (ox+.5)/sqres, (oy+.5)/sqres);
|
| 202 |
iovec[5] = output_orient *
|
| 203 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
|
| 204 |
if (funame == NULL)
|
| 205 |
bsdf = eval_rbfrep(rbf, iovec+3);
|
| 206 |
else {
|
| 207 |
if (assignD) {
|
| 208 |
varset("Dx", '=', -iovec[3]);
|
| 209 |
varset("Dy", '=', -iovec[4]);
|
| 210 |
varset("Dz", '=', -iovec[5]);
|
| 211 |
++eclock;
|
| 212 |
}
|
| 213 |
bsdf = funvalue(funame, 6, iovec);
|
| 214 |
#if (NSSAMP > 0)
|
| 215 |
if (abs_diff(bsdf, last_bsdf) > ssamp_thresh) {
|
| 216 |
int ssi;
|
| 217 |
double ssa[3], ssvec[6], sum = 0;
|
| 218 |
/* super-sample voxel */
|
| 219 |
for (ssi = NSSAMP; ssi--; ) {
|
| 220 |
SDmultiSamp(ssa, 3, (ssi+frandom()) *
|
| 221 |
(1./NSSAMP));
|
| 222 |
ssvec[0] = 2.*(ix+ssa[0])/sqres - 1.;
|
| 223 |
ssvec[1] = .0;
|
| 224 |
ssvec[2] = input_orient *
|
| 225 |
sqrt(1. - ssvec[0]*ssvec[0]);
|
| 226 |
SDsquare2disk(ssvec+3, (ox+ssa[1])/sqres,
|
| 227 |
(oy+ssa[2])/sqres);
|
| 228 |
ssvec[5] = output_orient *
|
| 229 |
sqrt(1. - ssvec[3]*ssvec[3] -
|
| 230 |
ssvec[4]*ssvec[4]);
|
| 231 |
if (assignD) {
|
| 232 |
varset("Dx", '=', -ssvec[3]);
|
| 233 |
varset("Dy", '=', -ssvec[4]);
|
| 234 |
varset("Dz", '=', -ssvec[5]);
|
| 235 |
++eclock;
|
| 236 |
}
|
| 237 |
sum += funvalue(funame, 6, ssvec);
|
| 238 |
}
|
| 239 |
bsdf = sum/NSSAMP;
|
| 240 |
}
|
| 241 |
#endif
|
| 242 |
}
|
| 243 |
if (pctcull >= 0)
|
| 244 |
fwrite(&bsdf, sizeof(bsdf), 1, ofp);
|
| 245 |
else
|
| 246 |
printf("\t%.3e\n", bsdf);
|
| 247 |
last_bsdf = bsdf;
|
| 248 |
}
|
| 249 |
}
|
| 250 |
if (rbf != NULL)
|
| 251 |
free(rbf);
|
| 252 |
prog_show((ix+1.)*(2./sqres));
|
| 253 |
}
|
| 254 |
if (pctcull >= 0) { /* finish output */
|
| 255 |
if (pclose(ofp)) {
|
| 256 |
fprintf(stderr, "%s: error running '%s'\n",
|
| 257 |
progname, cmd);
|
| 258 |
exit(1);
|
| 259 |
}
|
| 260 |
} else {
|
| 261 |
for (ix = sqres*sqres*sqres/2; ix--; )
|
| 262 |
fputs("\t0\n", stdout);
|
| 263 |
fputs("}\n", stdout);
|
| 264 |
}
|
| 265 |
data_epilogue();
|
| 266 |
prog_done();
|
| 267 |
}
|
| 268 |
|
| 269 |
/* Interpolate and output anisotropic BSDF data */
|
| 270 |
static void
|
| 271 |
eval_anisotropic(char *funame)
|
| 272 |
{
|
| 273 |
const int sqres = 1<<samp_order;
|
| 274 |
FILE *ofp = NULL;
|
| 275 |
int assignD = 0;
|
| 276 |
char cmd[128];
|
| 277 |
int ix, iy, ox, oy;
|
| 278 |
double iovec[6];
|
| 279 |
float bsdf;
|
| 280 |
|
| 281 |
data_prologue(); /* begin output */
|
| 282 |
if (pctcull >= 0) {
|
| 283 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d",
|
| 284 |
(input_orient>0 ^ output_orient>0) ? "" : " -a",
|
| 285 |
pctcull, samp_order);
|
| 286 |
fflush(stdout);
|
| 287 |
ofp = popen(cmd, "w");
|
| 288 |
if (ofp == NULL) {
|
| 289 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
|
| 290 |
progname);
|
| 291 |
exit(1);
|
| 292 |
}
|
| 293 |
SET_FILE_BINARY(ofp);
|
| 294 |
#ifdef getc_unlocked /* avoid lock/unlock overhead */
|
| 295 |
flockfile(ofp);
|
| 296 |
#endif
|
| 297 |
} else
|
| 298 |
fputs("{\n", stdout);
|
| 299 |
/* need to assign Dx, Dy, Dz? */
|
| 300 |
if (funame != NULL)
|
| 301 |
assignD = (fundefined(funame) < 6);
|
| 302 |
/* run through directions */
|
| 303 |
for (ix = 0; ix < sqres; ix++)
|
| 304 |
for (iy = 0; iy < sqres; iy++) {
|
| 305 |
RBFNODE *rbf = NULL; /* Klems reversal */
|
| 306 |
SDsquare2disk(iovec, 1.-(ix+.5)/sqres, 1.-(iy+.5)/sqres);
|
| 307 |
iovec[2] = input_orient *
|
| 308 |
sqrt(1. - iovec[0]*iovec[0] - iovec[1]*iovec[1]);
|
| 309 |
if (funame == NULL)
|
| 310 |
rbf = advect_rbf(iovec, lobe_lim);
|
| 311 |
for (ox = 0; ox < sqres; ox++) {
|
| 312 |
float last_bsdf = -1;
|
| 313 |
for (oy = 0; oy < sqres; oy++) {
|
| 314 |
SDsquare2disk(iovec+3, (ox+.5)/sqres, (oy+.5)/sqres);
|
| 315 |
iovec[5] = output_orient *
|
| 316 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
|
| 317 |
if (funame == NULL)
|
| 318 |
bsdf = eval_rbfrep(rbf, iovec+3);
|
| 319 |
else {
|
| 320 |
if (assignD) {
|
| 321 |
varset("Dx", '=', -iovec[3]);
|
| 322 |
varset("Dy", '=', -iovec[4]);
|
| 323 |
varset("Dz", '=', -iovec[5]);
|
| 324 |
++eclock;
|
| 325 |
}
|
| 326 |
bsdf = funvalue(funame, 6, iovec);
|
| 327 |
#if (NSSAMP > 0)
|
| 328 |
if (abs_diff(bsdf, last_bsdf) > ssamp_thresh) {
|
| 329 |
int ssi;
|
| 330 |
double ssa[4], ssvec[6], sum = 0;
|
| 331 |
/* super-sample voxel */
|
| 332 |
for (ssi = NSSAMP; ssi--; ) {
|
| 333 |
SDmultiSamp(ssa, 4, (ssi+frandom()) *
|
| 334 |
(1./NSSAMP));
|
| 335 |
SDsquare2disk(ssvec, 1.-(ix+ssa[0])/sqres,
|
| 336 |
1.-(iy+ssa[1])/sqres);
|
| 337 |
ssvec[2] = input_orient *
|
| 338 |
sqrt(1. - ssvec[0]*ssvec[0] -
|
| 339 |
ssvec[1]*ssvec[1]);
|
| 340 |
SDsquare2disk(ssvec+3, (ox+ssa[2])/sqres,
|
| 341 |
(oy+ssa[3])/sqres);
|
| 342 |
ssvec[5] = output_orient *
|
| 343 |
sqrt(1. - ssvec[3]*ssvec[3] -
|
| 344 |
ssvec[4]*ssvec[4]);
|
| 345 |
if (assignD) {
|
| 346 |
varset("Dx", '=', -ssvec[3]);
|
| 347 |
varset("Dy", '=', -ssvec[4]);
|
| 348 |
varset("Dz", '=', -ssvec[5]);
|
| 349 |
++eclock;
|
| 350 |
}
|
| 351 |
sum += funvalue(funame, 6, ssvec);
|
| 352 |
}
|
| 353 |
bsdf = sum/NSSAMP;
|
| 354 |
}
|
| 355 |
#endif
|
| 356 |
}
|
| 357 |
if (pctcull >= 0)
|
| 358 |
fwrite(&bsdf, sizeof(bsdf), 1, ofp);
|
| 359 |
else
|
| 360 |
printf("\t%.3e\n", bsdf);
|
| 361 |
last_bsdf = bsdf;
|
| 362 |
}
|
| 363 |
}
|
| 364 |
if (rbf != NULL)
|
| 365 |
free(rbf);
|
| 366 |
prog_show((ix*sqres+iy+1.)/(sqres*sqres));
|
| 367 |
}
|
| 368 |
if (pctcull >= 0) { /* finish output */
|
| 369 |
if (pclose(ofp)) {
|
| 370 |
fprintf(stderr, "%s: error running '%s'\n",
|
| 371 |
progname, cmd);
|
| 372 |
exit(1);
|
| 373 |
}
|
| 374 |
} else
|
| 375 |
fputs("}\n", stdout);
|
| 376 |
data_epilogue();
|
| 377 |
prog_done();
|
| 378 |
}
|
| 379 |
|
| 380 |
/* Read in BSDF and interpolate as tensor tree representation */
|
| 381 |
int
|
| 382 |
main(int argc, char *argv[])
|
| 383 |
{
|
| 384 |
int dofwd = 0, dobwd = 1;
|
| 385 |
int i, na;
|
| 386 |
|
| 387 |
progname = argv[0];
|
| 388 |
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST;
|
| 389 |
esupport &= ~(E_INCHAN|E_OUTCHAN);
|
| 390 |
scompile("PI:3.14159265358979323846", NULL, 0);
|
| 391 |
biggerlib();
|
| 392 |
for (i = 1; i < argc-1 && (argv[i][0] == '-') | (argv[i][0] == '+'); i++)
|
| 393 |
switch (argv[i][1]) { /* get options */
|
| 394 |
case 'e':
|
| 395 |
scompile(argv[++i], NULL, 0);
|
| 396 |
break;
|
| 397 |
case 'f':
|
| 398 |
if (!argv[i][2])
|
| 399 |
fcompile(argv[++i]);
|
| 400 |
else
|
| 401 |
dofwd = (argv[i][0] == '+');
|
| 402 |
break;
|
| 403 |
case 'b':
|
| 404 |
dobwd = (argv[i][0] == '+');
|
| 405 |
break;
|
| 406 |
case 't':
|
| 407 |
switch (argv[i][2]) {
|
| 408 |
case '3':
|
| 409 |
single_plane_incident = 1;
|
| 410 |
break;
|
| 411 |
case '4':
|
| 412 |
single_plane_incident = 0;
|
| 413 |
break;
|
| 414 |
case '\0':
|
| 415 |
pctcull = atof(argv[++i]);
|
| 416 |
break;
|
| 417 |
default:
|
| 418 |
goto userr;
|
| 419 |
}
|
| 420 |
break;
|
| 421 |
case 'g':
|
| 422 |
samp_order = atoi(argv[++i]);
|
| 423 |
break;
|
| 424 |
case 'l':
|
| 425 |
lobe_lim = atoi(argv[++i]);
|
| 426 |
break;
|
| 427 |
case 'p':
|
| 428 |
do_prog = atoi(argv[i]+2);
|
| 429 |
break;
|
| 430 |
default:
|
| 431 |
goto userr;
|
| 432 |
}
|
| 433 |
if (single_plane_incident >= 0) { /* function-based BSDF? */
|
| 434 |
void (*evf)(char *s) = single_plane_incident ?
|
| 435 |
&eval_isotropic : &eval_anisotropic;
|
| 436 |
if (i != argc-1 || fundefined(argv[i]) < 3) {
|
| 437 |
fprintf(stderr,
|
| 438 |
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n",
|
| 439 |
progname);
|
| 440 |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n");
|
| 441 |
goto userr;
|
| 442 |
}
|
| 443 |
++eclock;
|
| 444 |
xml_prologue(argc, argv); /* start XML output */
|
| 445 |
if (dofwd) {
|
| 446 |
input_orient = -1;
|
| 447 |
output_orient = -1;
|
| 448 |
prog_start("Evaluating outside reflectance");
|
| 449 |
(*evf)(argv[i]);
|
| 450 |
output_orient = 1;
|
| 451 |
prog_start("Evaluating outside->inside transmission");
|
| 452 |
(*evf)(argv[i]);
|
| 453 |
}
|
| 454 |
if (dobwd) {
|
| 455 |
input_orient = 1;
|
| 456 |
output_orient = 1;
|
| 457 |
prog_start("Evaluating inside reflectance");
|
| 458 |
(*evf)(argv[i]);
|
| 459 |
output_orient = -1;
|
| 460 |
prog_start("Evaluating inside->outside transmission");
|
| 461 |
(*evf)(argv[i]);
|
| 462 |
}
|
| 463 |
xml_epilogue(); /* finish XML output & exit */
|
| 464 |
return(0);
|
| 465 |
}
|
| 466 |
if (i < argc) { /* open input files if given */
|
| 467 |
int nbsdf = 0;
|
| 468 |
for ( ; i < argc; i++) { /* interpolate each component */
|
| 469 |
char pbuf[256];
|
| 470 |
FILE *fpin = fopen(argv[i], "rb");
|
| 471 |
if (fpin == NULL) {
|
| 472 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
|
| 473 |
progname, argv[i]);
|
| 474 |
return(1);
|
| 475 |
}
|
| 476 |
if (!load_bsdf_rep(fpin))
|
| 477 |
return(1);
|
| 478 |
fclose(fpin);
|
| 479 |
if (!nbsdf++) /* start XML on first dist. */
|
| 480 |
xml_prologue(argc, argv);
|
| 481 |
sprintf(pbuf, "Interpolating component '%s'", argv[i]);
|
| 482 |
prog_start(pbuf);
|
| 483 |
if (single_plane_incident)
|
| 484 |
eval_isotropic(NULL);
|
| 485 |
else
|
| 486 |
eval_anisotropic(NULL);
|
| 487 |
}
|
| 488 |
xml_epilogue(); /* finish XML output & exit */
|
| 489 |
return(0);
|
| 490 |
}
|
| 491 |
SET_FILE_BINARY(stdin); /* load from stdin */
|
| 492 |
if (!load_bsdf_rep(stdin))
|
| 493 |
return(1);
|
| 494 |
xml_prologue(argc, argv); /* start XML output */
|
| 495 |
prog_start("Interpolating from standard input");
|
| 496 |
if (single_plane_incident) /* resample dist. */
|
| 497 |
eval_isotropic(NULL);
|
| 498 |
else
|
| 499 |
eval_anisotropic(NULL);
|
| 500 |
xml_epilogue(); /* finish XML output & exit */
|
| 501 |
return(0);
|
| 502 |
userr:
|
| 503 |
fprintf(stderr,
|
| 504 |
"Usage: %s [-g Nlog2][-t pctcull][-l maxlobes] [bsdf.sir ..] > bsdf.xml\n",
|
| 505 |
progname);
|
| 506 |
fprintf(stderr,
|
| 507 |
" or: %s -t{3|4} [-g Nlog2][-t pctcull][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n",
|
| 508 |
progname);
|
| 509 |
return(1);
|
| 510 |
}
|
