| 1 |
greg |
2.1 |
#ifndef lint
|
| 2 |
greg |
2.28 |
static const char RCSid[] = "$Id: bsdf2klems.c,v 2.27 2019/06/17 23:58:32 greg Exp $";
|
| 3 |
greg |
2.1 |
#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 "random.h"
|
| 14 |
|
|
#include "platform.h"
|
| 15 |
greg |
2.20 |
#include "paths.h"
|
| 16 |
|
|
#include "rtio.h"
|
| 17 |
greg |
2.1 |
#include "calcomp.h"
|
| 18 |
|
|
#include "bsdfrep.h"
|
| 19 |
|
|
#include "bsdf_m.h"
|
| 20 |
greg |
2.20 |
/* tristimulus components */
|
| 21 |
|
|
enum {CIE_X, CIE_Y, CIE_Z};
|
| 22 |
greg |
2.4 |
/* assumed maximum # Klems patches */
|
| 23 |
|
|
#define MAXPATCHES 145
|
| 24 |
greg |
2.1 |
/* global argv[0] */
|
| 25 |
|
|
char *progname;
|
| 26 |
|
|
/* selected basis function name */
|
| 27 |
greg |
2.20 |
static const char klems_full[] = "LBNL/Klems Full";
|
| 28 |
|
|
static const char klems_half[] = "LBNL/Klems Half";
|
| 29 |
|
|
static const char klems_quarter[] = "LBNL/Klems Quarter";
|
| 30 |
|
|
static const char *kbasis = klems_full;
|
| 31 |
greg |
2.1 |
/* number of BSDF samples per patch */
|
| 32 |
greg |
2.26 |
static int npsamps = 1024;
|
| 33 |
greg |
2.10 |
/* limit on number of RBF lobes */
|
| 34 |
|
|
static int lobe_lim = 15000;
|
| 35 |
greg |
2.13 |
/* progress bar length */
|
| 36 |
|
|
static int do_prog = 79;
|
| 37 |
|
|
|
| 38 |
greg |
2.20 |
#define MAXCARG 512 /* wrapBSDF command */
|
| 39 |
|
|
static char *wrapBSDF[MAXCARG] = {"wrapBSDF", "-W", "-UU"};
|
| 40 |
|
|
static int wbsdfac = 3;
|
| 41 |
|
|
|
| 42 |
greg |
2.23 |
/* Add argument to wrapBSDF, allocating space if !isstatic */
|
| 43 |
greg |
2.20 |
static void
|
| 44 |
|
|
add_wbsdf(const char *arg, int isstatic)
|
| 45 |
|
|
{
|
| 46 |
|
|
if (arg == NULL)
|
| 47 |
|
|
return;
|
| 48 |
|
|
if (wbsdfac >= MAXCARG-1) {
|
| 49 |
|
|
fputs(progname, stderr);
|
| 50 |
|
|
fputs(": too many command arguments to wrapBSDF\n", stderr);
|
| 51 |
|
|
exit(1);
|
| 52 |
|
|
}
|
| 53 |
|
|
if (!*arg)
|
| 54 |
|
|
arg = "";
|
| 55 |
|
|
else if (!isstatic)
|
| 56 |
|
|
arg = savqstr((char *)arg);
|
| 57 |
|
|
|
| 58 |
|
|
wrapBSDF[wbsdfac++] = (char *)arg;
|
| 59 |
|
|
}
|
| 60 |
greg |
2.13 |
|
| 61 |
|
|
/* Start new progress bar */
|
| 62 |
|
|
#define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else
|
| 63 |
|
|
|
| 64 |
|
|
/* Draw progress bar of the appropriate length */
|
| 65 |
|
|
static void
|
| 66 |
|
|
prog_show(double frac)
|
| 67 |
|
|
{
|
| 68 |
greg |
2.17 |
static unsigned call_cnt = 0;
|
| 69 |
|
|
static char lastc[] = "-\\|/";
|
| 70 |
|
|
char pbar[256];
|
| 71 |
|
|
int nchars;
|
| 72 |
greg |
2.13 |
|
| 73 |
greg |
2.14 |
if (do_prog <= 1) return;
|
| 74 |
greg |
2.13 |
if (do_prog > sizeof(pbar)-2)
|
| 75 |
|
|
do_prog = sizeof(pbar)-2;
|
| 76 |
|
|
if (frac < 0) frac = 0;
|
| 77 |
greg |
2.17 |
else if (frac >= 1) frac = .9999;
|
| 78 |
|
|
nchars = do_prog*frac;
|
| 79 |
greg |
2.13 |
pbar[0] = '\r';
|
| 80 |
|
|
memset(pbar+1, '*', nchars);
|
| 81 |
greg |
2.17 |
pbar[nchars+1] = lastc[call_cnt++ & 3];
|
| 82 |
|
|
memset(pbar+2+nchars, '-', do_prog-nchars-1);
|
| 83 |
greg |
2.13 |
pbar[do_prog+1] = '\0';
|
| 84 |
|
|
fputs(pbar, stderr);
|
| 85 |
|
|
}
|
| 86 |
|
|
|
| 87 |
|
|
/* Finish progress bar */
|
| 88 |
greg |
2.14 |
static void
|
| 89 |
|
|
prog_done(void)
|
| 90 |
|
|
{
|
| 91 |
|
|
int n = do_prog;
|
| 92 |
|
|
|
| 93 |
|
|
if (n <= 1) return;
|
| 94 |
|
|
fputc('\r', stderr);
|
| 95 |
|
|
while (n--)
|
| 96 |
|
|
fputc(' ', stderr);
|
| 97 |
|
|
fputc('\r', stderr);
|
| 98 |
|
|
}
|
| 99 |
greg |
2.1 |
|
| 100 |
|
|
/* Return angle basis corresponding to the given name */
|
| 101 |
greg |
2.13 |
static ANGLE_BASIS *
|
| 102 |
greg |
2.1 |
get_basis(const char *bn)
|
| 103 |
|
|
{
|
| 104 |
|
|
int n = nabases;
|
| 105 |
|
|
|
| 106 |
|
|
while (n-- > 0)
|
| 107 |
|
|
if (!strcasecmp(bn, abase_list[n].name))
|
| 108 |
|
|
return &abase_list[n];
|
| 109 |
|
|
return NULL;
|
| 110 |
|
|
}
|
| 111 |
|
|
|
| 112 |
greg |
2.20 |
/* Copy geometry string to file for wrapBSDF */
|
| 113 |
|
|
static char *
|
| 114 |
|
|
save_geom(const char *mgf)
|
| 115 |
|
|
{
|
| 116 |
|
|
char *tfname = mktemp(savqstr(TEMPLATE));
|
| 117 |
|
|
int fd = open(tfname, O_CREAT|O_WRONLY, 0600);
|
| 118 |
|
|
|
| 119 |
|
|
if (fd < 0)
|
| 120 |
|
|
return(NULL);
|
| 121 |
|
|
write(fd, mgf, strlen(mgf));
|
| 122 |
|
|
close(fd);
|
| 123 |
|
|
add_wbsdf("-g", 1);
|
| 124 |
|
|
add_wbsdf(tfname, 1);
|
| 125 |
|
|
return(tfname);
|
| 126 |
|
|
}
|
| 127 |
|
|
|
| 128 |
|
|
/* Open XYZ component file for output and add appropriate arguments */
|
| 129 |
|
|
static FILE *
|
| 130 |
|
|
open_component_file(int c)
|
| 131 |
|
|
{
|
| 132 |
|
|
static const char sname[3][6] = {"CIE-X", "CIE-Y", "CIE-Z"};
|
| 133 |
|
|
static const char cname[4][4] = {"-rf", "-tf", "-tb", "-rb"};
|
| 134 |
|
|
char *tfname = mktemp(savqstr(TEMPLATE));
|
| 135 |
|
|
FILE *fp = fopen(tfname, "w");
|
| 136 |
|
|
|
| 137 |
|
|
if (fp == NULL) {
|
| 138 |
|
|
fprintf(stderr, "%s: cannot open '%s' for writing\n",
|
| 139 |
|
|
progname, tfname);
|
| 140 |
greg |
2.1 |
exit(1);
|
| 141 |
|
|
}
|
| 142 |
greg |
2.20 |
add_wbsdf("-s", 1); add_wbsdf(sname[c], 1);
|
| 143 |
|
|
add_wbsdf(cname[(input_orient>0)<<1 | (output_orient>0)], 1);
|
| 144 |
|
|
add_wbsdf(tfname, 1);
|
| 145 |
|
|
return(fp);
|
| 146 |
greg |
2.1 |
}
|
| 147 |
|
|
|
| 148 |
greg |
2.2 |
/* Load and resample XML BSDF description using Klems basis */
|
| 149 |
greg |
2.1 |
static void
|
| 150 |
|
|
eval_bsdf(const char *fname)
|
| 151 |
|
|
{
|
| 152 |
|
|
ANGLE_BASIS *abp = get_basis(kbasis);
|
| 153 |
greg |
2.20 |
FILE *cfp[3];
|
| 154 |
greg |
2.1 |
SDData bsd;
|
| 155 |
|
|
SDError ec;
|
| 156 |
|
|
FVECT vin, vout;
|
| 157 |
greg |
2.20 |
SDValue sdv;
|
| 158 |
|
|
double sum, xsum, ysum;
|
| 159 |
greg |
2.1 |
int i, j, n;
|
| 160 |
|
|
|
| 161 |
greg |
2.18 |
initurand(npsamps);
|
| 162 |
greg |
2.1 |
SDclearBSDF(&bsd, fname); /* load BSDF file */
|
| 163 |
|
|
if ((ec = SDloadFile(&bsd, fname)) != SDEnone)
|
| 164 |
|
|
goto err;
|
| 165 |
greg |
2.20 |
if (bsd.mgf != NULL) /* save geometry */
|
| 166 |
|
|
save_geom(bsd.mgf);
|
| 167 |
|
|
if (bsd.matn[0]) /* save identifier(s) */
|
| 168 |
|
|
strcpy(bsdf_name, bsd.matn);
|
| 169 |
|
|
if (bsd.makr[0])
|
| 170 |
|
|
strcpy(bsdf_manuf, bsd.makr);
|
| 171 |
|
|
if (bsd.dim[2] > 0) { /* save dimension(s) */
|
| 172 |
|
|
char buf[64];
|
| 173 |
|
|
if ((bsd.dim[0] > 0) & (bsd.dim[1] > 0))
|
| 174 |
|
|
sprintf(buf, "w=%g;h=%g;t=%g",
|
| 175 |
|
|
bsd.dim[0], bsd.dim[1], bsd.dim[2]);
|
| 176 |
|
|
else
|
| 177 |
|
|
sprintf(buf, "t=%g", bsd.dim[2]);
|
| 178 |
|
|
add_wbsdf("-f", 1);
|
| 179 |
|
|
add_wbsdf(buf, 0);
|
| 180 |
|
|
}
|
| 181 |
greg |
2.1 |
/* front reflection */
|
| 182 |
|
|
if (bsd.rf != NULL || bsd.rLambFront.cieY > .002) {
|
| 183 |
|
|
input_orient = 1; output_orient = 1;
|
| 184 |
greg |
2.20 |
cfp[CIE_Y] = open_component_file(CIE_Y);
|
| 185 |
|
|
if (bsd.rf != NULL && bsd.rf->comp[0].cspec[2].flags) {
|
| 186 |
|
|
rbf_colorimetry = RBCtristimulus;
|
| 187 |
|
|
cfp[CIE_X] = open_component_file(CIE_X);
|
| 188 |
|
|
cfp[CIE_Z] = open_component_file(CIE_Z);
|
| 189 |
|
|
} else
|
| 190 |
|
|
rbf_colorimetry = RBCphotopic;
|
| 191 |
greg |
2.1 |
for (j = 0; j < abp->nangles; j++) {
|
| 192 |
|
|
for (i = 0; i < abp->nangles; i++) {
|
| 193 |
|
|
sum = 0; /* average over patches */
|
| 194 |
greg |
2.20 |
xsum = ysum = 0;
|
| 195 |
greg |
2.1 |
for (n = npsamps; n-- > 0; ) {
|
| 196 |
|
|
fo_getvec(vout, j+(n+frandom())/npsamps, abp);
|
| 197 |
greg |
2.5 |
fi_getvec(vin, i+urand(n), abp);
|
| 198 |
greg |
2.20 |
ec = SDevalBSDF(&sdv, vout, vin, &bsd);
|
| 199 |
greg |
2.1 |
if (ec != SDEnone)
|
| 200 |
|
|
goto err;
|
| 201 |
greg |
2.20 |
sum += sdv.cieY;
|
| 202 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 203 |
greg |
2.21 |
xsum += sdv.cieY * sdv.spec.cx;
|
| 204 |
|
|
ysum += sdv.cieY * sdv.spec.cy;
|
| 205 |
greg |
2.20 |
}
|
| 206 |
|
|
}
|
| 207 |
|
|
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps);
|
| 208 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 209 |
greg |
2.21 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum));
|
| 210 |
|
|
fprintf(cfp[CIE_Z], "\t%.3e\n",
|
| 211 |
greg |
2.20 |
(sum - xsum - ysum)*sum/(npsamps*ysum));
|
| 212 |
greg |
2.1 |
}
|
| 213 |
|
|
}
|
| 214 |
greg |
2.20 |
fputc('\n', cfp[CIE_Y]); /* extra space between rows */
|
| 215 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 216 |
|
|
fputc('\n', cfp[CIE_X]);
|
| 217 |
|
|
fputc('\n', cfp[CIE_Z]);
|
| 218 |
|
|
}
|
| 219 |
|
|
}
|
| 220 |
|
|
if (fclose(cfp[CIE_Y])) {
|
| 221 |
|
|
fprintf(stderr, "%s: error writing Y output\n", progname);
|
| 222 |
|
|
exit(1);
|
| 223 |
|
|
}
|
| 224 |
|
|
if (rbf_colorimetry == RBCtristimulus &&
|
| 225 |
|
|
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) {
|
| 226 |
|
|
fprintf(stderr, "%s: error writing X/Z output\n", progname);
|
| 227 |
|
|
exit(1);
|
| 228 |
greg |
2.1 |
}
|
| 229 |
|
|
}
|
| 230 |
|
|
/* back reflection */
|
| 231 |
|
|
if (bsd.rb != NULL || bsd.rLambBack.cieY > .002) {
|
| 232 |
|
|
input_orient = -1; output_orient = -1;
|
| 233 |
greg |
2.20 |
cfp[CIE_Y] = open_component_file(CIE_Y);
|
| 234 |
|
|
if (bsd.rb != NULL && bsd.rb->comp[0].cspec[2].flags) {
|
| 235 |
|
|
rbf_colorimetry = RBCtristimulus;
|
| 236 |
|
|
cfp[CIE_X] = open_component_file(CIE_X);
|
| 237 |
|
|
cfp[CIE_Z] = open_component_file(CIE_Z);
|
| 238 |
|
|
} else
|
| 239 |
|
|
rbf_colorimetry = RBCphotopic;
|
| 240 |
greg |
2.1 |
for (j = 0; j < abp->nangles; j++) {
|
| 241 |
|
|
for (i = 0; i < abp->nangles; i++) {
|
| 242 |
|
|
sum = 0; /* average over patches */
|
| 243 |
greg |
2.20 |
xsum = ysum = 0;
|
| 244 |
greg |
2.1 |
for (n = npsamps; n-- > 0; ) {
|
| 245 |
|
|
bo_getvec(vout, j+(n+frandom())/npsamps, abp);
|
| 246 |
greg |
2.5 |
bi_getvec(vin, i+urand(n), abp);
|
| 247 |
greg |
2.20 |
ec = SDevalBSDF(&sdv, vout, vin, &bsd);
|
| 248 |
greg |
2.1 |
if (ec != SDEnone)
|
| 249 |
|
|
goto err;
|
| 250 |
greg |
2.20 |
sum += sdv.cieY;
|
| 251 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 252 |
greg |
2.21 |
xsum += sdv.cieY * sdv.spec.cx;
|
| 253 |
|
|
ysum += sdv.cieY * sdv.spec.cy;
|
| 254 |
greg |
2.20 |
}
|
| 255 |
|
|
}
|
| 256 |
|
|
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps);
|
| 257 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 258 |
greg |
2.21 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum));
|
| 259 |
|
|
fprintf(cfp[CIE_Z], "\t%.3e\n",
|
| 260 |
greg |
2.20 |
(sum - xsum - ysum)*sum/(npsamps*ysum));
|
| 261 |
greg |
2.1 |
}
|
| 262 |
|
|
}
|
| 263 |
greg |
2.20 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 264 |
|
|
fputc('\n', cfp[CIE_X]);
|
| 265 |
|
|
fputc('\n', cfp[CIE_Z]);
|
| 266 |
|
|
}
|
| 267 |
|
|
}
|
| 268 |
|
|
if (fclose(cfp[CIE_Y])) {
|
| 269 |
|
|
fprintf(stderr, "%s: error writing Y output\n", progname);
|
| 270 |
|
|
exit(1);
|
| 271 |
|
|
}
|
| 272 |
|
|
if (rbf_colorimetry == RBCtristimulus &&
|
| 273 |
|
|
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) {
|
| 274 |
|
|
fprintf(stderr, "%s: error writing X/Z output\n", progname);
|
| 275 |
|
|
exit(1);
|
| 276 |
greg |
2.1 |
}
|
| 277 |
|
|
}
|
| 278 |
|
|
/* front transmission */
|
| 279 |
|
|
if (bsd.tf != NULL || bsd.tLamb.cieY > .002) {
|
| 280 |
|
|
input_orient = 1; output_orient = -1;
|
| 281 |
greg |
2.20 |
cfp[CIE_Y] = open_component_file(CIE_Y);
|
| 282 |
|
|
if (bsd.tf != NULL && bsd.tf->comp[0].cspec[2].flags) {
|
| 283 |
|
|
rbf_colorimetry = RBCtristimulus;
|
| 284 |
|
|
cfp[CIE_X] = open_component_file(CIE_X);
|
| 285 |
|
|
cfp[CIE_Z] = open_component_file(CIE_Z);
|
| 286 |
|
|
} else
|
| 287 |
|
|
rbf_colorimetry = RBCphotopic;
|
| 288 |
greg |
2.1 |
for (j = 0; j < abp->nangles; j++) {
|
| 289 |
|
|
for (i = 0; i < abp->nangles; i++) {
|
| 290 |
|
|
sum = 0; /* average over patches */
|
| 291 |
greg |
2.20 |
xsum = ysum = 0;
|
| 292 |
greg |
2.1 |
for (n = npsamps; n-- > 0; ) {
|
| 293 |
|
|
bo_getvec(vout, j+(n+frandom())/npsamps, abp);
|
| 294 |
greg |
2.5 |
fi_getvec(vin, i+urand(n), abp);
|
| 295 |
greg |
2.20 |
ec = SDevalBSDF(&sdv, vout, vin, &bsd);
|
| 296 |
greg |
2.1 |
if (ec != SDEnone)
|
| 297 |
|
|
goto err;
|
| 298 |
greg |
2.20 |
sum += sdv.cieY;
|
| 299 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 300 |
greg |
2.21 |
xsum += sdv.cieY * sdv.spec.cx;
|
| 301 |
|
|
ysum += sdv.cieY * sdv.spec.cy;
|
| 302 |
greg |
2.20 |
}
|
| 303 |
greg |
2.1 |
}
|
| 304 |
greg |
2.20 |
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps);
|
| 305 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 306 |
greg |
2.21 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum));
|
| 307 |
|
|
fprintf(cfp[CIE_Z], "\t%.3e\n",
|
| 308 |
greg |
2.20 |
(sum - xsum - ysum)*sum/(npsamps*ysum));
|
| 309 |
|
|
}
|
| 310 |
|
|
}
|
| 311 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 312 |
|
|
fputc('\n', cfp[CIE_X]);
|
| 313 |
|
|
fputc('\n', cfp[CIE_Z]);
|
| 314 |
greg |
2.1 |
}
|
| 315 |
|
|
}
|
| 316 |
greg |
2.20 |
if (fclose(cfp[CIE_Y])) {
|
| 317 |
|
|
fprintf(stderr, "%s: error writing Y output\n", progname);
|
| 318 |
|
|
exit(1);
|
| 319 |
|
|
}
|
| 320 |
|
|
if (rbf_colorimetry == RBCtristimulus &&
|
| 321 |
|
|
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) {
|
| 322 |
|
|
fprintf(stderr, "%s: error writing X/Z output\n", progname);
|
| 323 |
|
|
exit(1);
|
| 324 |
|
|
}
|
| 325 |
greg |
2.1 |
}
|
| 326 |
|
|
/* back transmission */
|
| 327 |
greg |
2.9 |
if ((bsd.tb != NULL) | (bsd.tf != NULL)) {
|
| 328 |
greg |
2.1 |
input_orient = -1; output_orient = 1;
|
| 329 |
greg |
2.20 |
cfp[CIE_Y] = open_component_file(CIE_Y);
|
| 330 |
greg |
2.21 |
if (bsd.tb != NULL)
|
| 331 |
|
|
rbf_colorimetry = bsd.tb->comp[0].cspec[2].flags
|
| 332 |
|
|
? RBCtristimulus : RBCphotopic ;
|
| 333 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 334 |
greg |
2.20 |
cfp[CIE_X] = open_component_file(CIE_X);
|
| 335 |
|
|
cfp[CIE_Z] = open_component_file(CIE_Z);
|
| 336 |
greg |
2.21 |
}
|
| 337 |
greg |
2.1 |
for (j = 0; j < abp->nangles; j++) {
|
| 338 |
greg |
2.9 |
for (i = 0; i < abp->nangles; i++) {
|
| 339 |
|
|
sum = 0; /* average over patches */
|
| 340 |
greg |
2.20 |
xsum = ysum = 0;
|
| 341 |
greg |
2.9 |
for (n = npsamps; n-- > 0; ) {
|
| 342 |
|
|
fo_getvec(vout, j+(n+frandom())/npsamps, abp);
|
| 343 |
|
|
bi_getvec(vin, i+urand(n), abp);
|
| 344 |
greg |
2.20 |
ec = SDevalBSDF(&sdv, vout, vin, &bsd);
|
| 345 |
greg |
2.9 |
if (ec != SDEnone)
|
| 346 |
greg |
2.1 |
goto err;
|
| 347 |
greg |
2.20 |
sum += sdv.cieY;
|
| 348 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 349 |
greg |
2.21 |
xsum += sdv.cieY * sdv.spec.cx;
|
| 350 |
|
|
ysum += sdv.cieY * sdv.spec.cy;
|
| 351 |
greg |
2.20 |
}
|
| 352 |
|
|
}
|
| 353 |
|
|
fprintf(cfp[CIE_Y], "\t%.3e\n", sum/npsamps);
|
| 354 |
|
|
if (rbf_colorimetry == RBCtristimulus) {
|
| 355 |
greg |
2.21 |
fprintf(cfp[CIE_X], "\t%.3e\n", xsum*sum/(npsamps*ysum));
|
| 356 |
|
|
fprintf(cfp[CIE_Z], "\t%.3e\n",
|
| 357 |
greg |
2.20 |
(sum - xsum - ysum)*sum/(npsamps*ysum));
|
| 358 |
greg |
2.1 |
}
|
| 359 |
greg |
2.9 |
}
|
| 360 |
greg |
2.20 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 361 |
|
|
fputc('\n', cfp[CIE_X]);
|
| 362 |
|
|
fputc('\n', cfp[CIE_Z]);
|
| 363 |
|
|
}
|
| 364 |
|
|
}
|
| 365 |
|
|
if (fclose(cfp[CIE_Y])) {
|
| 366 |
|
|
fprintf(stderr, "%s: error writing Y output\n", progname);
|
| 367 |
|
|
exit(1);
|
| 368 |
|
|
}
|
| 369 |
|
|
if (rbf_colorimetry == RBCtristimulus &&
|
| 370 |
|
|
(fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z]))) {
|
| 371 |
|
|
fprintf(stderr, "%s: error writing X/Z output\n", progname);
|
| 372 |
|
|
exit(1);
|
| 373 |
greg |
2.1 |
}
|
| 374 |
|
|
}
|
| 375 |
|
|
SDfreeBSDF(&bsd); /* all done */
|
| 376 |
|
|
return;
|
| 377 |
|
|
err:
|
| 378 |
|
|
SDreportError(ec, stderr);
|
| 379 |
|
|
exit(1);
|
| 380 |
|
|
}
|
| 381 |
|
|
|
| 382 |
greg |
2.2 |
/* Interpolate and output a BSDF function using Klems basis */
|
| 383 |
greg |
2.1 |
static void
|
| 384 |
|
|
eval_function(char *funame)
|
| 385 |
|
|
{
|
| 386 |
|
|
ANGLE_BASIS *abp = get_basis(kbasis);
|
| 387 |
greg |
2.8 |
int assignD = (fundefined(funame) < 6);
|
| 388 |
greg |
2.20 |
FILE *ofp = open_component_file(CIE_Y);
|
| 389 |
greg |
2.1 |
double iovec[6];
|
| 390 |
|
|
double sum;
|
| 391 |
|
|
int i, j, n;
|
| 392 |
|
|
|
| 393 |
greg |
2.4 |
initurand(npsamps);
|
| 394 |
greg |
2.1 |
for (j = 0; j < abp->nangles; j++) { /* run through directions */
|
| 395 |
|
|
for (i = 0; i < abp->nangles; i++) {
|
| 396 |
|
|
sum = 0;
|
| 397 |
|
|
for (n = npsamps; n--; ) { /* average over patches */
|
| 398 |
|
|
if (output_orient > 0)
|
| 399 |
|
|
fo_getvec(iovec+3, j+(n+frandom())/npsamps, abp);
|
| 400 |
|
|
else
|
| 401 |
|
|
bo_getvec(iovec+3, j+(n+frandom())/npsamps, abp);
|
| 402 |
|
|
|
| 403 |
|
|
if (input_orient > 0)
|
| 404 |
greg |
2.4 |
fi_getvec(iovec, i+urand(n), abp);
|
| 405 |
greg |
2.1 |
else
|
| 406 |
greg |
2.4 |
bi_getvec(iovec, i+urand(n), abp);
|
| 407 |
greg |
2.1 |
|
| 408 |
greg |
2.8 |
if (assignD) {
|
| 409 |
|
|
varset("Dx", '=', -iovec[3]);
|
| 410 |
|
|
varset("Dy", '=', -iovec[4]);
|
| 411 |
|
|
varset("Dz", '=', -iovec[5]);
|
| 412 |
|
|
++eclock;
|
| 413 |
|
|
}
|
| 414 |
greg |
2.1 |
sum += funvalue(funame, 6, iovec);
|
| 415 |
|
|
}
|
| 416 |
greg |
2.20 |
fprintf(ofp, "\t%.3e\n", sum/npsamps);
|
| 417 |
greg |
2.1 |
}
|
| 418 |
greg |
2.20 |
fputc('\n', ofp);
|
| 419 |
greg |
2.13 |
prog_show((j+1.)/abp->nangles);
|
| 420 |
greg |
2.1 |
}
|
| 421 |
greg |
2.13 |
prog_done();
|
| 422 |
greg |
2.20 |
if (fclose(ofp)) {
|
| 423 |
|
|
fprintf(stderr, "%s: error writing Y output\n", progname);
|
| 424 |
|
|
exit(1);
|
| 425 |
|
|
}
|
| 426 |
greg |
2.1 |
}
|
| 427 |
|
|
|
| 428 |
|
|
/* Interpolate and output a radial basis function BSDF representation */
|
| 429 |
|
|
static void
|
| 430 |
|
|
eval_rbf(void)
|
| 431 |
|
|
{
|
| 432 |
greg |
2.27 |
ANGLE_BASIS *abp = get_basis(kbasis);
|
| 433 |
|
|
float (*XZarr)[2] = NULL;
|
| 434 |
|
|
float bsdfarr[MAXPATCHES*MAXPATCHES];
|
| 435 |
|
|
FILE *cfp[3];
|
| 436 |
|
|
FVECT vin, vout;
|
| 437 |
|
|
double sum, xsum, ysum, normf;
|
| 438 |
|
|
int i, j, ni, no, nisamps, nosamps;
|
| 439 |
|
|
/* sanity check */
|
| 440 |
|
|
if (abp->nangles > MAXPATCHES) {
|
| 441 |
|
|
fprintf(stderr, "%s: too many patches!\n", progname);
|
| 442 |
|
|
exit(1);
|
| 443 |
|
|
}
|
| 444 |
|
|
memset(bsdfarr, 0, sizeof(bsdfarr));
|
| 445 |
|
|
if (rbf_colorimetry == RBCtristimulus)
|
| 446 |
|
|
XZarr = (float (*)[2])calloc(abp->nangles*abp->nangles, 2*sizeof(float));
|
| 447 |
|
|
nosamps = (int)(pow((double)npsamps, 0.67) + .5);
|
| 448 |
|
|
nisamps = (npsamps + (nosamps>>1)) / nosamps;
|
| 449 |
|
|
normf = 1./(double)(nisamps*nosamps);
|
| 450 |
|
|
for (i = 0; i < abp->nangles; i++) {
|
| 451 |
|
|
for (ni = nisamps; ni--; ) { /* sample over incident patch */
|
| 452 |
|
|
RBFNODE *rbf;
|
| 453 |
|
|
if (input_orient > 0) /* vary incident patch loc. */
|
| 454 |
|
|
fi_getvec(vin, i+urand(ni), abp);
|
| 455 |
|
|
else
|
| 456 |
|
|
bi_getvec(vin, i+urand(ni), abp);
|
| 457 |
greg |
2.2 |
|
| 458 |
greg |
2.27 |
rbf = advect_rbf(vin, lobe_lim); /* compute radial basis func */
|
| 459 |
greg |
2.2 |
|
| 460 |
greg |
2.27 |
for (j = 0; j < abp->nangles; j++) {
|
| 461 |
|
|
sum = 0; /* sample over exiting patch */
|
| 462 |
greg |
2.20 |
xsum = ysum = 0;
|
| 463 |
greg |
2.27 |
for (no = nosamps; no--; ) {
|
| 464 |
greg |
2.20 |
SDValue sdv;
|
| 465 |
greg |
2.2 |
if (output_orient > 0)
|
| 466 |
greg |
2.27 |
fo_getvec(vout, j+(no+frandom())/nosamps, abp);
|
| 467 |
greg |
2.2 |
else
|
| 468 |
greg |
2.27 |
bo_getvec(vout, j+(no+frandom())/nosamps, abp);
|
| 469 |
greg |
2.1 |
|
| 470 |
greg |
2.20 |
eval_rbfcol(&sdv, rbf, vout);
|
| 471 |
|
|
sum += sdv.cieY;
|
| 472 |
greg |
2.23 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 473 |
greg |
2.21 |
xsum += sdv.cieY * sdv.spec.cx;
|
| 474 |
|
|
ysum += sdv.cieY * sdv.spec.cy;
|
| 475 |
greg |
2.27 |
}
|
| 476 |
greg |
2.20 |
}
|
| 477 |
greg |
2.27 |
no = j*abp->nangles + i;
|
| 478 |
|
|
bsdfarr[no] += sum * normf;
|
| 479 |
greg |
2.23 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 480 |
greg |
2.27 |
XZarr[no][0] += xsum*sum*normf/ysum;
|
| 481 |
|
|
XZarr[no][1] += (sum - xsum - ysum)*sum*normf/ysum;
|
| 482 |
greg |
2.2 |
}
|
| 483 |
|
|
}
|
| 484 |
greg |
2.27 |
if (rbf != NULL)
|
| 485 |
greg |
2.6 |
free(rbf);
|
| 486 |
greg |
2.20 |
}
|
| 487 |
greg |
2.27 |
prog_show((i+1.)/abp->nangles);
|
| 488 |
|
|
}
|
| 489 |
|
|
/* write out our matrix */
|
| 490 |
|
|
cfp[CIE_Y] = open_component_file(CIE_Y);
|
| 491 |
|
|
no = 0;
|
| 492 |
|
|
for (j = 0; j < abp->nangles; j++) {
|
| 493 |
|
|
for (i = 0; i < abp->nangles; i++, no++)
|
| 494 |
|
|
fprintf(cfp[CIE_Y], "\t%.3e\n", bsdfarr[no]);
|
| 495 |
|
|
fputc('\n', cfp[CIE_Y]);
|
| 496 |
|
|
}
|
| 497 |
|
|
prog_done();
|
| 498 |
|
|
if (fclose(cfp[CIE_Y])) {
|
| 499 |
|
|
fprintf(stderr, "%s: error writing Y output\n", progname);
|
| 500 |
|
|
exit(1);
|
| 501 |
|
|
}
|
| 502 |
|
|
if (XZarr == NULL) /* no color? */
|
| 503 |
|
|
return;
|
| 504 |
|
|
cfp[CIE_X] = open_component_file(CIE_X);
|
| 505 |
|
|
cfp[CIE_Z] = open_component_file(CIE_Z);
|
| 506 |
|
|
no = 0;
|
| 507 |
|
|
for (j = 0; j < abp->nangles; j++) {
|
| 508 |
|
|
for (i = 0; i < abp->nangles; i++, no++) {
|
| 509 |
|
|
fprintf(cfp[CIE_X], "\t%.3e\n", XZarr[no][0]);
|
| 510 |
|
|
fprintf(cfp[CIE_Z], "\t%.3e\n", XZarr[no][1]);
|
| 511 |
|
|
}
|
| 512 |
|
|
fputc('\n', cfp[CIE_X]);
|
| 513 |
|
|
fputc('\n', cfp[CIE_Z]);
|
| 514 |
|
|
}
|
| 515 |
|
|
free(XZarr);
|
| 516 |
|
|
if (fclose(cfp[CIE_X]) || fclose(cfp[CIE_Z])) {
|
| 517 |
|
|
fprintf(stderr, "%s: error writing X/Z output\n", progname);
|
| 518 |
|
|
exit(1);
|
| 519 |
|
|
}
|
| 520 |
greg |
2.1 |
}
|
| 521 |
|
|
|
| 522 |
schorsch |
2.22 |
#if defined(_WIN32) || defined(_WIN64)
|
| 523 |
greg |
2.20 |
/* Execute wrapBSDF command (may never return) */
|
| 524 |
|
|
static int
|
| 525 |
|
|
wrap_up(void)
|
| 526 |
|
|
{
|
| 527 |
|
|
char cmd[8192];
|
| 528 |
|
|
|
| 529 |
|
|
if (bsdf_manuf[0]) {
|
| 530 |
|
|
add_wbsdf("-f", 1);
|
| 531 |
|
|
strcpy(cmd, "m=");
|
| 532 |
|
|
strcpy(cmd+2, bsdf_manuf);
|
| 533 |
|
|
add_wbsdf(cmd, 0);
|
| 534 |
|
|
}
|
| 535 |
|
|
if (bsdf_name[0]) {
|
| 536 |
|
|
add_wbsdf("-f", 1);
|
| 537 |
|
|
strcpy(cmd, "n=");
|
| 538 |
|
|
strcpy(cmd+2, bsdf_name);
|
| 539 |
|
|
add_wbsdf(cmd, 0);
|
| 540 |
|
|
}
|
| 541 |
|
|
if (!convert_commandline(cmd, sizeof(cmd), wrapBSDF)) {
|
| 542 |
|
|
fputs(progname, stderr);
|
| 543 |
|
|
fputs(": command line too long in wrap_up()\n", stderr);
|
| 544 |
|
|
return(1);
|
| 545 |
|
|
}
|
| 546 |
|
|
return(system(cmd));
|
| 547 |
|
|
}
|
| 548 |
|
|
#else
|
| 549 |
|
|
/* Execute wrapBSDF command (may never return) */
|
| 550 |
|
|
static int
|
| 551 |
|
|
wrap_up(void)
|
| 552 |
|
|
{
|
| 553 |
|
|
char buf[256];
|
| 554 |
|
|
char *compath = getpath((char *)wrapBSDF[0], getenv("PATH"), X_OK);
|
| 555 |
|
|
|
| 556 |
|
|
if (compath == NULL) {
|
| 557 |
|
|
fprintf(stderr, "%s: cannot locate %s\n", progname, wrapBSDF[0]);
|
| 558 |
|
|
return(1);
|
| 559 |
|
|
}
|
| 560 |
|
|
if (bsdf_manuf[0]) {
|
| 561 |
|
|
add_wbsdf("-f", 1);
|
| 562 |
|
|
strcpy(buf, "m=");
|
| 563 |
|
|
strcpy(buf+2, bsdf_manuf);
|
| 564 |
|
|
add_wbsdf(buf, 0);
|
| 565 |
|
|
}
|
| 566 |
|
|
if (bsdf_name[0]) {
|
| 567 |
|
|
add_wbsdf("-f", 1);
|
| 568 |
|
|
strcpy(buf, "n=");
|
| 569 |
|
|
strcpy(buf+2, bsdf_name);
|
| 570 |
|
|
add_wbsdf(buf, 0);
|
| 571 |
|
|
}
|
| 572 |
|
|
execv(compath, wrapBSDF); /* successful call never returns */
|
| 573 |
|
|
perror(compath);
|
| 574 |
|
|
return(1);
|
| 575 |
|
|
}
|
| 576 |
|
|
#endif
|
| 577 |
|
|
|
| 578 |
greg |
2.1 |
/* Read in BSDF and interpolate as Klems matrix representation */
|
| 579 |
|
|
int
|
| 580 |
|
|
main(int argc, char *argv[])
|
| 581 |
|
|
{
|
| 582 |
|
|
int dofwd = 0, dobwd = 1;
|
| 583 |
greg |
2.20 |
char buf[2048];
|
| 584 |
greg |
2.1 |
char *cp;
|
| 585 |
|
|
int i, na;
|
| 586 |
|
|
|
| 587 |
|
|
progname = argv[0];
|
| 588 |
|
|
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST;
|
| 589 |
|
|
esupport &= ~(E_INCHAN|E_OUTCHAN);
|
| 590 |
|
|
scompile("PI:3.14159265358979323846", NULL, 0);
|
| 591 |
|
|
biggerlib();
|
| 592 |
greg |
2.2 |
for (i = 1; i < argc && (argv[i][0] == '-') | (argv[i][0] == '+'); i++)
|
| 593 |
greg |
2.1 |
switch (argv[i][1]) { /* get options */
|
| 594 |
|
|
case 'n':
|
| 595 |
|
|
npsamps = atoi(argv[++i]);
|
| 596 |
|
|
if (npsamps <= 0)
|
| 597 |
|
|
goto userr;
|
| 598 |
|
|
break;
|
| 599 |
|
|
case 'e':
|
| 600 |
|
|
scompile(argv[++i], NULL, 0);
|
| 601 |
|
|
single_plane_incident = 0;
|
| 602 |
|
|
break;
|
| 603 |
|
|
case 'f':
|
| 604 |
|
|
if (!argv[i][2]) {
|
| 605 |
greg |
2.20 |
if (strchr(argv[++i], '=') != NULL) {
|
| 606 |
|
|
add_wbsdf("-f", 1);
|
| 607 |
|
|
add_wbsdf(argv[i], 1);
|
| 608 |
|
|
} else {
|
| 609 |
greg |
2.25 |
char *fpath = getpath(argv[i],
|
| 610 |
|
|
getrlibpath(), 0);
|
| 611 |
|
|
if (fpath == NULL) {
|
| 612 |
|
|
fprintf(stderr,
|
| 613 |
|
|
"%s: cannot find file '%s'\n",
|
| 614 |
|
|
argv[0], argv[i]);
|
| 615 |
|
|
return(1);
|
| 616 |
|
|
}
|
| 617 |
|
|
fcompile(fpath);
|
| 618 |
greg |
2.20 |
single_plane_incident = 0;
|
| 619 |
|
|
}
|
| 620 |
greg |
2.1 |
} else
|
| 621 |
|
|
dofwd = (argv[i][0] == '+');
|
| 622 |
|
|
break;
|
| 623 |
|
|
case 'b':
|
| 624 |
|
|
dobwd = (argv[i][0] == '+');
|
| 625 |
|
|
break;
|
| 626 |
|
|
case 'h':
|
| 627 |
greg |
2.20 |
kbasis = klems_half;
|
| 628 |
|
|
add_wbsdf("-a", 1);
|
| 629 |
|
|
add_wbsdf("kh", 1);
|
| 630 |
greg |
2.1 |
break;
|
| 631 |
|
|
case 'q':
|
| 632 |
greg |
2.20 |
kbasis = klems_quarter;
|
| 633 |
|
|
add_wbsdf("-a", 1);
|
| 634 |
|
|
add_wbsdf("kq", 1);
|
| 635 |
greg |
2.1 |
break;
|
| 636 |
greg |
2.10 |
case 'l':
|
| 637 |
|
|
lobe_lim = atoi(argv[++i]);
|
| 638 |
|
|
break;
|
| 639 |
greg |
2.13 |
case 'p':
|
| 640 |
|
|
do_prog = atoi(argv[i]+2);
|
| 641 |
|
|
break;
|
| 642 |
greg |
2.20 |
case 'C':
|
| 643 |
|
|
add_wbsdf(argv[i], 1);
|
| 644 |
|
|
add_wbsdf(argv[++i], 1);
|
| 645 |
|
|
break;
|
| 646 |
greg |
2.1 |
default:
|
| 647 |
|
|
goto userr;
|
| 648 |
|
|
}
|
| 649 |
greg |
2.20 |
if (kbasis == klems_full) { /* default (full) basis? */
|
| 650 |
|
|
add_wbsdf("-a", 1);
|
| 651 |
|
|
add_wbsdf("kf", 1);
|
| 652 |
|
|
}
|
| 653 |
|
|
strcpy(buf, "File produced by: ");
|
| 654 |
|
|
if (convert_commandline(buf+18, sizeof(buf)-18, argv) != NULL) {
|
| 655 |
|
|
add_wbsdf("-C", 1); add_wbsdf(buf, 0);
|
| 656 |
|
|
}
|
| 657 |
greg |
2.1 |
if (single_plane_incident >= 0) { /* function-based BSDF? */
|
| 658 |
greg |
2.19 |
if (i != argc-1 || fundefined(argv[i]) < 3) {
|
| 659 |
greg |
2.1 |
fprintf(stderr,
|
| 660 |
|
|
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n",
|
| 661 |
|
|
progname);
|
| 662 |
greg |
2.13 |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n");
|
| 663 |
greg |
2.1 |
goto userr;
|
| 664 |
|
|
}
|
| 665 |
greg |
2.8 |
++eclock;
|
| 666 |
greg |
2.1 |
if (dofwd) {
|
| 667 |
|
|
input_orient = -1;
|
| 668 |
|
|
output_orient = -1;
|
| 669 |
greg |
2.13 |
prog_start("Evaluating outside reflectance");
|
| 670 |
|
|
eval_function(argv[i]);
|
| 671 |
greg |
2.1 |
output_orient = 1;
|
| 672 |
greg |
2.13 |
prog_start("Evaluating outside->inside transmission");
|
| 673 |
|
|
eval_function(argv[i]);
|
| 674 |
greg |
2.1 |
}
|
| 675 |
|
|
if (dobwd) {
|
| 676 |
|
|
input_orient = 1;
|
| 677 |
|
|
output_orient = 1;
|
| 678 |
greg |
2.13 |
prog_start("Evaluating inside reflectance");
|
| 679 |
|
|
eval_function(argv[i]);
|
| 680 |
greg |
2.1 |
output_orient = -1;
|
| 681 |
greg |
2.13 |
prog_start("Evaluating inside->outside transmission");
|
| 682 |
|
|
eval_function(argv[i]);
|
| 683 |
greg |
2.1 |
}
|
| 684 |
greg |
2.20 |
return(wrap_up());
|
| 685 |
greg |
2.1 |
}
|
| 686 |
greg |
2.2 |
/* XML input? */
|
| 687 |
|
|
if (i == argc-1 && (cp = argv[i]+strlen(argv[i])-4) > argv[i] &&
|
| 688 |
|
|
!strcasecmp(cp, ".xml")) {
|
| 689 |
greg |
2.1 |
eval_bsdf(argv[i]); /* load & resample BSDF */
|
| 690 |
greg |
2.20 |
return(wrap_up());
|
| 691 |
greg |
2.1 |
}
|
| 692 |
|
|
if (i < argc) { /* open input files if given */
|
| 693 |
|
|
int nbsdf = 0;
|
| 694 |
|
|
for ( ; i < argc; i++) { /* interpolate each component */
|
| 695 |
greg |
2.13 |
char pbuf[256];
|
| 696 |
greg |
2.1 |
FILE *fpin = fopen(argv[i], "rb");
|
| 697 |
|
|
if (fpin == NULL) {
|
| 698 |
|
|
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
|
| 699 |
|
|
progname, argv[i]);
|
| 700 |
|
|
return(1);
|
| 701 |
|
|
}
|
| 702 |
|
|
if (!load_bsdf_rep(fpin))
|
| 703 |
|
|
return(1);
|
| 704 |
|
|
fclose(fpin);
|
| 705 |
greg |
2.13 |
sprintf(pbuf, "Interpolating component '%s'", argv[i]);
|
| 706 |
|
|
prog_start(pbuf);
|
| 707 |
greg |
2.1 |
eval_rbf();
|
| 708 |
|
|
}
|
| 709 |
greg |
2.20 |
return(wrap_up());
|
| 710 |
greg |
2.1 |
}
|
| 711 |
|
|
SET_FILE_BINARY(stdin); /* load from stdin */
|
| 712 |
|
|
if (!load_bsdf_rep(stdin))
|
| 713 |
|
|
return(1);
|
| 714 |
greg |
2.13 |
prog_start("Interpolating from standard input");
|
| 715 |
greg |
2.1 |
eval_rbf(); /* resample dist. */
|
| 716 |
greg |
2.20 |
return(wrap_up());
|
| 717 |
greg |
2.1 |
userr:
|
| 718 |
|
|
fprintf(stderr,
|
| 719 |
greg |
2.10 |
"Usage: %s [-n spp][-h|-q][-l maxlobes] [bsdf.sir ..] > bsdf.xml\n", progname);
|
| 720 |
greg |
2.1 |
fprintf(stderr,
|
| 721 |
greg |
2.3 |
" or: %s [-n spp][-h|-q] bsdf_in.xml > bsdf_out.xml\n", progname);
|
| 722 |
greg |
2.1 |
fprintf(stderr,
|
| 723 |
|
|
" or: %s [-n spp][-h|-q][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n",
|
| 724 |
|
|
progname);
|
| 725 |
|
|
return(1);
|
| 726 |
|
|
}
|
