| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: bsdf2rad.c,v 2.22 2017/04/11 02:21:37 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Plot 3-D BSDF output based on scattering interpolant or XML representation |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <stdio.h> |
| 9 |
#include <string.h> |
| 10 |
#include <stdlib.h> |
| 11 |
#include "paths.h" |
| 12 |
#include "rtmath.h" |
| 13 |
#include "resolu.h" |
| 14 |
#include "bsdfrep.h" |
| 15 |
|
| 16 |
#define NINCIDENT 37 /* number of samples/hemisphere */ |
| 17 |
|
| 18 |
#define GRIDSTEP 2 /* our grid step size */ |
| 19 |
#define SAMPRES (GRIDRES/GRIDSTEP) |
| 20 |
|
| 21 |
int front_comp = 0; /* front component flags (SDsamp*) */ |
| 22 |
int back_comp = 0; /* back component flags */ |
| 23 |
double overall_min = 1./PI; /* overall minimum BSDF value */ |
| 24 |
double min_log10; /* smallest log10 value for plotting */ |
| 25 |
double overall_max = .0; /* overall maximum BSDF value */ |
| 26 |
|
| 27 |
char ourTempDir[TEMPLEN] = ""; /* our temporary directory */ |
| 28 |
|
| 29 |
const char frpref[] = "frefl"; |
| 30 |
const char ftpref[] = "ftrans"; |
| 31 |
const char brpref[] = "brefl"; |
| 32 |
const char btpref[] = "btrans"; |
| 33 |
const char dsuffix[] = ".txt"; |
| 34 |
|
| 35 |
const char sph_mat[] = "BSDFmat"; |
| 36 |
const double sph_rad = 10.; |
| 37 |
const double sph_xoffset = 15.; |
| 38 |
|
| 39 |
#define bsdf_rad (sph_rad*.25) |
| 40 |
#define arrow_rad (bsdf_rad*.015) |
| 41 |
|
| 42 |
#define FEQ(a,b) ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7) |
| 43 |
|
| 44 |
#define set_minlog() (min_log10 = log10(overall_min + 1e-5) - .1) |
| 45 |
|
| 46 |
char *progname; |
| 47 |
|
| 48 |
/* Get Fibonacci sphere vector (0 to NINCIDENT-1) */ |
| 49 |
static RREAL * |
| 50 |
get_ivector(FVECT iv, int i) |
| 51 |
{ |
| 52 |
const double phistep = PI*(3. - 2.236067978); |
| 53 |
double r; |
| 54 |
|
| 55 |
iv[2] = 1. - (i+.5)*(1./NINCIDENT); |
| 56 |
r = sqrt(1. - iv[2]*iv[2]); |
| 57 |
iv[0] = r * cos((i+1.)*phistep); |
| 58 |
iv[1] = r * sin((i+1.)*phistep); |
| 59 |
|
| 60 |
return(iv); |
| 61 |
} |
| 62 |
|
| 63 |
/* Convert incident vector into sphere position */ |
| 64 |
static RREAL * |
| 65 |
cvt_sposition(FVECT sp, const FVECT iv, int inc_side) |
| 66 |
{ |
| 67 |
sp[0] = -iv[0]*sph_rad + inc_side*sph_xoffset; |
| 68 |
sp[1] = -iv[1]*sph_rad; |
| 69 |
sp[2] = iv[2]*sph_rad; |
| 70 |
|
| 71 |
return(sp); |
| 72 |
} |
| 73 |
|
| 74 |
/* Get temporary file name */ |
| 75 |
static char * |
| 76 |
tfile_name(const char *prefix, const char *suffix, int i) |
| 77 |
{ |
| 78 |
static char buf[128]; |
| 79 |
|
| 80 |
if (!ourTempDir[0]) { /* create temporary directory */ |
| 81 |
mktemp(strcpy(ourTempDir,TEMPLATE)); |
| 82 |
if (mkdir(ourTempDir, 0777) < 0) { |
| 83 |
perror("mkdir"); |
| 84 |
exit(1); |
| 85 |
} |
| 86 |
} |
| 87 |
if (!prefix) prefix = "T"; |
| 88 |
if (!suffix) suffix = ""; |
| 89 |
sprintf(buf, "%s/%s%03d%s", ourTempDir, prefix, i, suffix); |
| 90 |
return(buf); |
| 91 |
} |
| 92 |
|
| 93 |
/* Remove temporary directory & contents */ |
| 94 |
static void |
| 95 |
cleanup_tmp(void) |
| 96 |
{ |
| 97 |
char buf[128]; |
| 98 |
|
| 99 |
if (!ourTempDir[0]) |
| 100 |
return; |
| 101 |
#if defined(_WIN32) || defined(_WIN64) |
| 102 |
sprintf(buf, "RMDIR %s /S /Q", ourTempDir); |
| 103 |
#else |
| 104 |
sprintf(buf, "rm -rf %s", ourTempDir); |
| 105 |
#endif |
| 106 |
system(buf); |
| 107 |
} |
| 108 |
|
| 109 |
/* Run the specified command, returning 1 if OK */ |
| 110 |
static int |
| 111 |
run_cmd(const char *cmd) |
| 112 |
{ |
| 113 |
fflush(stdout); |
| 114 |
if (system(cmd)) { |
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fprintf(stderr, "%s: error running: %s\n", progname, cmd); |
| 116 |
return(0); |
| 117 |
} |
| 118 |
return(1); |
| 119 |
} |
| 120 |
|
| 121 |
/* Plot surface points for the given BSDF incident angle */ |
| 122 |
static int |
| 123 |
plotBSDF(const char *fname, const FVECT ivec, int dfl, const SDData *sd) |
| 124 |
{ |
| 125 |
FILE *fp = fopen(fname, "w"); |
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int i, j; |
| 127 |
|
| 128 |
if (fp == NULL) { |
| 129 |
fprintf(stderr, "%s: cannot open '%s' for writing\n", |
| 130 |
progname, fname); |
| 131 |
return(0); |
| 132 |
} |
| 133 |
if (ivec[2] > 0) { |
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input_orient = 1; |
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output_orient = dfl&SDsampR ? 1 : -1; |
| 136 |
} else { |
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input_orient = -1; |
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output_orient = dfl&SDsampR ? -1 : 1; |
| 139 |
} |
| 140 |
for (i = SAMPRES; i--; ) |
| 141 |
for (j = 0; j < SAMPRES; j++) { |
| 142 |
FVECT ovec; |
| 143 |
SDValue sval; |
| 144 |
double bsdf; |
| 145 |
ovec_from_pos(ovec, i*GRIDSTEP, j*GRIDSTEP); |
| 146 |
if (SDreportError(SDevalBSDF(&sval, ovec, |
| 147 |
ivec, sd), stderr)) |
| 148 |
return(0); |
| 149 |
if (sval.cieY > overall_max) |
| 150 |
overall_max = sval.cieY; |
| 151 |
bsdf = (sval.cieY < overall_min) ? overall_min : sval.cieY; |
| 152 |
bsdf = log10(bsdf) - min_log10; |
| 153 |
fprintf(fp, "%.5f %.5f %.5f\n", |
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ovec[0]*bsdf, ovec[1]*bsdf, ovec[2]*bsdf); |
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} |
| 156 |
if (fclose(fp) == EOF) { |
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fprintf(stderr, "%s: error writing data to '%s'\n", |
| 158 |
progname, fname); |
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return(0); |
| 160 |
} |
| 161 |
return(1); |
| 162 |
} |
| 163 |
|
| 164 |
/* Build BSDF values from loaded XML file */ |
| 165 |
static int |
| 166 |
build_wBSDF(const SDData *sd) |
| 167 |
{ |
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FVECT ivec; |
| 169 |
int i; |
| 170 |
|
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if (front_comp & SDsampR) |
| 172 |
for (i = 0; i < NINCIDENT; i++) { |
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get_ivector(ivec, i); |
| 174 |
if (!plotBSDF(tfile_name(frpref, dsuffix, i), |
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ivec, SDsampR, sd)) |
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return(0); |
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} |
| 178 |
if (front_comp & SDsampT) |
| 179 |
for (i = 0; i < NINCIDENT; i++) { |
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get_ivector(ivec, i); |
| 181 |
if (!plotBSDF(tfile_name(ftpref, dsuffix, i), |
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ivec, SDsampT, sd)) |
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return(0); |
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} |
| 185 |
if (back_comp & SDsampR) |
| 186 |
for (i = 0; i < NINCIDENT; i++) { |
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get_ivector(ivec, i); |
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ivec[0] = -ivec[0]; ivec[2] = -ivec[2]; |
| 189 |
if (!plotBSDF(tfile_name(brpref, dsuffix, i), |
| 190 |
ivec, SDsampR, sd)) |
| 191 |
return(0); |
| 192 |
} |
| 193 |
if (back_comp & SDsampT) |
| 194 |
for (i = 0; i < NINCIDENT; i++) { |
| 195 |
get_ivector(ivec, i); |
| 196 |
ivec[0] = -ivec[0]; ivec[2] = -ivec[2]; |
| 197 |
if (!plotBSDF(tfile_name(btpref, dsuffix, i), |
| 198 |
ivec, SDsampT, sd)) |
| 199 |
return(0); |
| 200 |
} |
| 201 |
return(1); |
| 202 |
} |
| 203 |
|
| 204 |
/* Plot surface points using radial basis function */ |
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static int |
| 206 |
plotRBF(const char *fname, const RBFNODE *rbf) |
| 207 |
{ |
| 208 |
FILE *fp = fopen(fname, "w"); |
| 209 |
int i, j; |
| 210 |
|
| 211 |
if (fp == NULL) { |
| 212 |
fprintf(stderr, "%s: cannot open '%s' for writing\n", |
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progname, fname); |
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return(0); |
| 215 |
} |
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for (i = SAMPRES; i--; ) |
| 217 |
for (j = 0; j < SAMPRES; j++) { |
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FVECT ovec; |
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double bsdf; |
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ovec_from_pos(ovec, i*GRIDSTEP, j*GRIDSTEP); |
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bsdf = eval_rbfrep(rbf, ovec); |
| 222 |
if (bsdf > overall_max) |
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overall_max = bsdf; |
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else if (bsdf < overall_min) |
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bsdf = overall_min; |
| 226 |
bsdf = log10(bsdf) - min_log10; |
| 227 |
fprintf(fp, "%.5f %.5f %.5f\n", |
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ovec[0]*bsdf, ovec[1]*bsdf, ovec[2]*bsdf); |
| 229 |
} |
| 230 |
if (fclose(fp) == EOF) { |
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fprintf(stderr, "%s: error writing data to '%s'\n", |
| 232 |
progname, fname); |
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return(0); |
| 234 |
} |
| 235 |
return(1); |
| 236 |
} |
| 237 |
|
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/* Build BSDF values from scattering interpolant representation */ |
| 239 |
static int |
| 240 |
build_wRBF(void) |
| 241 |
{ |
| 242 |
const char *pref; |
| 243 |
int i; |
| 244 |
|
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if (input_orient > 0) { |
| 246 |
if (output_orient > 0) |
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pref = frpref; |
| 248 |
else |
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pref = ftpref; |
| 250 |
} else if (output_orient < 0) |
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pref = brpref; |
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else |
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pref = btpref; |
| 254 |
|
| 255 |
for (i = 0; i < NINCIDENT; i++) { |
| 256 |
FVECT ivec; |
| 257 |
RBFNODE *rbf; |
| 258 |
get_ivector(ivec, i); |
| 259 |
if (input_orient < 0) { |
| 260 |
ivec[0] = -ivec[0]; ivec[2] = -ivec[2]; |
| 261 |
} |
| 262 |
rbf = advect_rbf(ivec, 15000); |
| 263 |
if (!plotRBF(tfile_name(pref, dsuffix, i), rbf)) |
| 264 |
return(0); |
| 265 |
if (rbf) free(rbf); |
| 266 |
} |
| 267 |
return(1); /* next call frees */ |
| 268 |
} |
| 269 |
|
| 270 |
/* Put out mirror arrow for the given incident vector */ |
| 271 |
static void |
| 272 |
put_mirror_arrow(const FVECT ivec, int inc_side) |
| 273 |
{ |
| 274 |
const double arrow_len = 1.2*bsdf_rad; |
| 275 |
const double tip_len = 0.2*bsdf_rad; |
| 276 |
FVECT origin, refl; |
| 277 |
int i; |
| 278 |
|
| 279 |
cvt_sposition(origin, ivec, inc_side); |
| 280 |
|
| 281 |
refl[0] = -2.*ivec[2]*ivec[0]; |
| 282 |
refl[1] = -2.*ivec[2]*ivec[1]; |
| 283 |
refl[2] = 2.*ivec[2]*ivec[2] - 1.; |
| 284 |
|
| 285 |
printf("\n# Mirror arrow\n"); |
| 286 |
printf("\narrow_mat cylinder inc_dir\n0\n0\n7"); |
| 287 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f\n", |
| 288 |
origin[0], origin[1], origin[2]+arrow_len, |
| 289 |
origin[0], origin[1], origin[2], |
| 290 |
arrow_rad); |
| 291 |
printf("\narrow_mat cylinder mir_dir\n0\n0\n7"); |
| 292 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f\n", |
| 293 |
origin[0], origin[1], origin[2], |
| 294 |
origin[0] + arrow_len*refl[0], |
| 295 |
origin[1] + arrow_len*refl[1], |
| 296 |
origin[2] + arrow_len*refl[2], |
| 297 |
arrow_rad); |
| 298 |
printf("\narrow_mat cone mir_tip\n0\n0\n8"); |
| 299 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f 0\n", |
| 300 |
origin[0] + (arrow_len-.5*tip_len)*refl[0], |
| 301 |
origin[1] + (arrow_len-.5*tip_len)*refl[1], |
| 302 |
origin[2] + (arrow_len-.5*tip_len)*refl[2], |
| 303 |
origin[0] + (arrow_len+.5*tip_len)*refl[0], |
| 304 |
origin[1] + (arrow_len+.5*tip_len)*refl[1], |
| 305 |
origin[2] + (arrow_len+.5*tip_len)*refl[2], |
| 306 |
2.*arrow_rad); |
| 307 |
} |
| 308 |
|
| 309 |
/* Put out transmitted direction arrow for the given incident vector */ |
| 310 |
static void |
| 311 |
put_trans_arrow(const FVECT ivec, int inc_side) |
| 312 |
{ |
| 313 |
const double arrow_len = 1.2*bsdf_rad; |
| 314 |
const double tip_len = 0.2*bsdf_rad; |
| 315 |
FVECT origin; |
| 316 |
int i; |
| 317 |
|
| 318 |
cvt_sposition(origin, ivec, inc_side); |
| 319 |
|
| 320 |
printf("\n# Transmission arrow\n"); |
| 321 |
printf("\narrow_mat cylinder trans_dir\n0\n0\n7"); |
| 322 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f\n", |
| 323 |
origin[0], origin[1], origin[2], |
| 324 |
origin[0], origin[1], origin[2]-arrow_len, |
| 325 |
arrow_rad); |
| 326 |
printf("\narrow_mat cone trans_tip\n0\n0\n8"); |
| 327 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f 0\n", |
| 328 |
origin[0], origin[1], origin[2]-arrow_len+.5*tip_len, |
| 329 |
origin[0], origin[1], origin[2]-arrow_len-.5*tip_len, |
| 330 |
2.*arrow_rad); |
| 331 |
} |
| 332 |
|
| 333 |
/* Compute rotation (x,y,z) => (xp,yp,zp) */ |
| 334 |
static int |
| 335 |
addrot(char *xf, const FVECT xp, const FVECT yp, const FVECT zp) |
| 336 |
{ |
| 337 |
int n = 0; |
| 338 |
double theta; |
| 339 |
|
| 340 |
if (yp[2]*yp[2] + zp[2]*zp[2] < 2.*FTINY*FTINY) { |
| 341 |
/* Special case for X' along Z-axis */ |
| 342 |
theta = -atan2(yp[0], yp[1]); |
| 343 |
sprintf(xf, " -ry %f -rz %f", |
| 344 |
xp[2] < 0.0 ? 90.0 : -90.0, |
| 345 |
theta*(180./PI)); |
| 346 |
return(4); |
| 347 |
} |
| 348 |
theta = atan2(yp[2], zp[2]); |
| 349 |
if (!FEQ(theta,0.0)) { |
| 350 |
sprintf(xf, " -rx %f", theta*(180./PI)); |
| 351 |
while (*xf) ++xf; |
| 352 |
n += 2; |
| 353 |
} |
| 354 |
theta = Asin(-xp[2]); |
| 355 |
if (!FEQ(theta,0.0)) { |
| 356 |
sprintf(xf, " -ry %f", theta*(180./PI)); |
| 357 |
while (*xf) ++xf; |
| 358 |
n += 2; |
| 359 |
} |
| 360 |
theta = atan2(xp[1], xp[0]); |
| 361 |
if (!FEQ(theta,0.0)) { |
| 362 |
sprintf(xf, " -rz %f", theta*(180./PI)); |
| 363 |
/* while (*xf) ++xf; */ |
| 364 |
n += 2; |
| 365 |
} |
| 366 |
return(n); |
| 367 |
} |
| 368 |
|
| 369 |
/* Put out BSDF surfaces */ |
| 370 |
static int |
| 371 |
put_BSDFs(void) |
| 372 |
{ |
| 373 |
const double scalef = bsdf_rad/(log10(overall_max) - min_log10); |
| 374 |
FVECT ivec, sorg, upv; |
| 375 |
RREAL vMtx[3][3]; |
| 376 |
char *fname; |
| 377 |
char cmdbuf[256]; |
| 378 |
char xfargs[128]; |
| 379 |
int nxfa; |
| 380 |
int i; |
| 381 |
|
| 382 |
printf("\n# Gensurf output corresponding to %d incident directions\n", |
| 383 |
NINCIDENT); |
| 384 |
|
| 385 |
printf("\nvoid glow arrow_glow\n0\n0\n4 1 0 1 0\n"); |
| 386 |
printf("\nvoid mixfunc arrow_mat\n4 arrow_glow void 0.25 .\n0\n0\n"); |
| 387 |
|
| 388 |
if (front_comp & SDsampR) /* front reflection */ |
| 389 |
for (i = 0; i < NINCIDENT; i++) { |
| 390 |
get_ivector(ivec, i); |
| 391 |
put_mirror_arrow(ivec, 1); |
| 392 |
cvt_sposition(sorg, ivec, 1); |
| 393 |
ivec[0] = -ivec[0]; ivec[1] = -ivec[1]; /* normal */ |
| 394 |
upv[0] = ivec[0]*ivec[1]*(ivec[2] - 1.); |
| 395 |
upv[1] = ivec[0]*ivec[0] + ivec[1]*ivec[1]*ivec[2]; |
| 396 |
upv[2] = -ivec[1]*(ivec[0]*ivec[0] + ivec[1]*ivec[1]); |
| 397 |
sprintf(xfargs, "-s %f -t %f %f %f", bsdf_rad, |
| 398 |
sorg[0], sorg[1], sorg[2]); |
| 399 |
nxfa = 6; |
| 400 |
printf("\nvoid colorfunc scale_pat\n"); |
| 401 |
printf("%d bsdf_red bsdf_grn bsdf_blu bsdf2rad.cal\n\t%s\n0\n0\n", |
| 402 |
4+nxfa, xfargs); |
| 403 |
printf("\nscale_pat glow scale_mat\n0\n0\n4 1 1 1 0\n"); |
| 404 |
if (SDcompXform(vMtx, ivec, upv) != SDEnone) |
| 405 |
continue; |
| 406 |
nxfa = addrot(xfargs, vMtx[0], vMtx[1], vMtx[2]); |
| 407 |
sprintf(xfargs+strlen(xfargs), " -s %f -t %f %f %f", |
| 408 |
scalef, sorg[0], sorg[1], sorg[2]); |
| 409 |
nxfa += 6; |
| 410 |
fname = tfile_name(frpref, dsuffix, i); |
| 411 |
sprintf(cmdbuf, "gensurf scale_mat %s%d %s %s %s %d %d | xform %s", |
| 412 |
frpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
| 413 |
xfargs); |
| 414 |
if (!run_cmd(cmdbuf)) |
| 415 |
return(0); |
| 416 |
} |
| 417 |
if (front_comp & SDsampT) /* front transmission */ |
| 418 |
for (i = 0; i < NINCIDENT; i++) { |
| 419 |
get_ivector(ivec, i); |
| 420 |
put_trans_arrow(ivec, 1); |
| 421 |
cvt_sposition(sorg, ivec, 1); |
| 422 |
ivec[0] = -ivec[0]; ivec[1] = -ivec[1]; /* normal */ |
| 423 |
upv[0] = ivec[0]*ivec[1]*(ivec[2] - 1.); |
| 424 |
upv[1] = ivec[0]*ivec[0] + ivec[1]*ivec[1]*ivec[2]; |
| 425 |
upv[2] = -ivec[1]*(ivec[0]*ivec[0] + ivec[1]*ivec[1]); |
| 426 |
sprintf(xfargs, "-s %f -t %f %f %f", bsdf_rad, |
| 427 |
sorg[0], sorg[1], sorg[2]); |
| 428 |
nxfa = 6; |
| 429 |
printf("\nvoid colorfunc scale_pat\n"); |
| 430 |
printf("%d bsdf_red bsdf_grn bsdf_blu bsdf2rad.cal\n\t%s\n0\n0\n", |
| 431 |
4+nxfa, xfargs); |
| 432 |
printf("\nscale_pat glow scale_mat\n0\n0\n4 1 1 1 0\n"); |
| 433 |
if (SDcompXform(vMtx, ivec, upv) != SDEnone) |
| 434 |
continue; |
| 435 |
nxfa = addrot(xfargs, vMtx[0], vMtx[1], vMtx[2]); |
| 436 |
sprintf(xfargs+strlen(xfargs), " -s %f -t %f %f %f", |
| 437 |
scalef, sorg[0], sorg[1], sorg[2]); |
| 438 |
nxfa += 6; |
| 439 |
fname = tfile_name(ftpref, dsuffix, i); |
| 440 |
sprintf(cmdbuf, "gensurf scale_mat %s%d %s %s %s %d %d | xform -I %s", |
| 441 |
ftpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
| 442 |
xfargs); |
| 443 |
if (!run_cmd(cmdbuf)) |
| 444 |
return(0); |
| 445 |
} |
| 446 |
if (back_comp & SDsampR) /* rear reflection */ |
| 447 |
for (i = 0; i < NINCIDENT; i++) { |
| 448 |
get_ivector(ivec, i); |
| 449 |
put_mirror_arrow(ivec, -1); |
| 450 |
cvt_sposition(sorg, ivec, -1); |
| 451 |
ivec[0] = -ivec[0]; ivec[1] = -ivec[1]; /* normal */ |
| 452 |
upv[0] = ivec[0]*ivec[1]*(ivec[2] - 1.); |
| 453 |
upv[1] = ivec[0]*ivec[0] + ivec[1]*ivec[1]*ivec[2]; |
| 454 |
upv[2] = -ivec[1]*(ivec[0]*ivec[0] + ivec[1]*ivec[1]); |
| 455 |
sprintf(xfargs, "-s %f -t %f %f %f", bsdf_rad, |
| 456 |
sorg[0], sorg[1], sorg[2]); |
| 457 |
nxfa = 6; |
| 458 |
printf("\nvoid colorfunc scale_pat\n"); |
| 459 |
printf("%d bsdf_red bsdf_grn bsdf_blu bsdf2rad.cal\n\t%s\n0\n0\n", |
| 460 |
4+nxfa, xfargs); |
| 461 |
printf("\nscale_pat glow scale_mat\n0\n0\n4 1 1 1 0\n"); |
| 462 |
if (SDcompXform(vMtx, ivec, upv) != SDEnone) |
| 463 |
continue; |
| 464 |
nxfa = addrot(xfargs, vMtx[0], vMtx[1], vMtx[2]); |
| 465 |
sprintf(xfargs+strlen(xfargs), " -s %f -t %f %f %f", |
| 466 |
scalef, sorg[0], sorg[1], sorg[2]); |
| 467 |
nxfa += 6; |
| 468 |
fname = tfile_name(brpref, dsuffix, i); |
| 469 |
sprintf(cmdbuf, "gensurf scale_mat %s%d %s %s %s %d %d | xform -I -ry 180 %s", |
| 470 |
brpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
| 471 |
xfargs); |
| 472 |
if (!run_cmd(cmdbuf)) |
| 473 |
return(0); |
| 474 |
} |
| 475 |
if (back_comp & SDsampT) /* rear transmission */ |
| 476 |
for (i = 0; i < NINCIDENT; i++) { |
| 477 |
get_ivector(ivec, i); |
| 478 |
put_trans_arrow(ivec, -1); |
| 479 |
cvt_sposition(sorg, ivec, -1); |
| 480 |
ivec[0] = -ivec[0]; ivec[1] = -ivec[1]; /* normal */ |
| 481 |
upv[0] = ivec[0]*ivec[1]*(ivec[2] - 1.); |
| 482 |
upv[1] = ivec[0]*ivec[0] + ivec[1]*ivec[1]*ivec[2]; |
| 483 |
upv[2] = -ivec[1]*(ivec[0]*ivec[0] + ivec[1]*ivec[1]); |
| 484 |
sprintf(xfargs, "-s %f -t %f %f %f", bsdf_rad, |
| 485 |
sorg[0], sorg[1], sorg[2]); |
| 486 |
nxfa = 6; |
| 487 |
printf("\nvoid colorfunc scale_pat\n"); |
| 488 |
printf("%d bsdf_red bsdf_grn bsdf_blu bsdf2rad.cal\n\t%s\n0\n0\n", |
| 489 |
4+nxfa, xfargs); |
| 490 |
printf("\nscale_pat glow scale_mat\n0\n0\n4 1 1 1 0\n"); |
| 491 |
if (SDcompXform(vMtx, ivec, upv) != SDEnone) |
| 492 |
continue; |
| 493 |
nxfa = addrot(xfargs, vMtx[0], vMtx[1], vMtx[2]); |
| 494 |
sprintf(xfargs+strlen(xfargs), " -s %f -t %f %f %f", |
| 495 |
scalef, sorg[0], sorg[1], sorg[2]); |
| 496 |
nxfa += 6; |
| 497 |
fname = tfile_name(btpref, dsuffix, i); |
| 498 |
sprintf(cmdbuf, "gensurf scale_mat %s%d %s %s %s %d %d | xform -ry 180 %s", |
| 499 |
btpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
| 500 |
xfargs); |
| 501 |
if (!run_cmd(cmdbuf)) |
| 502 |
return(0); |
| 503 |
} |
| 504 |
return(1); |
| 505 |
} |
| 506 |
|
| 507 |
/* Put our hemisphere material */ |
| 508 |
static void |
| 509 |
put_matBSDF(const char *XMLfile) |
| 510 |
{ |
| 511 |
const char *curdir = "./"; |
| 512 |
|
| 513 |
if (!XMLfile) { /* simple material */ |
| 514 |
printf("\n# Simplified material because we have no XML input\n"); |
| 515 |
printf("\nvoid brightfunc latlong\n2 latlong bsdf2rad.cal\n0\n0\n"); |
| 516 |
if ((front_comp|back_comp) & SDsampT) |
| 517 |
printf("\nlatlong trans %s\n0\n0\n7 .75 .75 .75 0 .04 .5 .8\n", |
| 518 |
sph_mat); |
| 519 |
else |
| 520 |
printf("\nlatlong plastic %s\n0\n0\n5 .5 .5 .5 0 0\n", |
| 521 |
sph_mat); |
| 522 |
return; |
| 523 |
} |
| 524 |
switch (XMLfile[0]) { /* avoid RAYPATH search */ |
| 525 |
case '.': |
| 526 |
CASEDIRSEP: |
| 527 |
curdir = ""; |
| 528 |
break; |
| 529 |
case '\0': |
| 530 |
fprintf(stderr, "%s: empty file name in put_matBSDF\n", progname); |
| 531 |
exit(1); |
| 532 |
break; |
| 533 |
} |
| 534 |
printf("\n# Actual BSDF material for rendering the hemispheres\n"); |
| 535 |
printf("\nvoid BSDF BSDFmat\n6 0 \"%s%s\" upx upy upz bsdf2rad.cal\n0\n0\n", |
| 536 |
curdir, XMLfile); |
| 537 |
printf("\nvoid plastic black\n0\n0\n5 0 0 0 0 0\n"); |
| 538 |
printf("\nvoid mixfunc %s\n4 BSDFmat black latlong bsdf2rad.cal\n0\n0\n", |
| 539 |
sph_mat); |
| 540 |
} |
| 541 |
|
| 542 |
/* Put out overhead parallel light source */ |
| 543 |
static void |
| 544 |
put_source(void) |
| 545 |
{ |
| 546 |
printf("\n# Overhead parallel light source\n"); |
| 547 |
printf("\nvoid light bright\n0\n0\n3 2500 2500 2500\n"); |
| 548 |
printf("\nbright source light\n0\n0\n4 0 0 1 2\n"); |
| 549 |
printf("\n# Material used for labels\n"); |
| 550 |
printf("\nvoid trans vellum\n0\n0\n7 1 1 1 0 0 .5 0\n"); |
| 551 |
} |
| 552 |
|
| 553 |
/* Put out hemisphere(s) */ |
| 554 |
static void |
| 555 |
put_hemispheres(void) |
| 556 |
{ |
| 557 |
const int nsegs = 131; |
| 558 |
|
| 559 |
printf("\n# Hemisphere(s) for showing BSDF appearance (if XML file)\n"); |
| 560 |
if (front_comp) { |
| 561 |
printf( |
| 562 |
"\n!genrev %s Front \"R*sin(A*t)\" \"R*cos(A*t)\" %d -e \"R:%g;A:%f\" -s | xform -t %g 0 0\n", |
| 563 |
sph_mat, nsegs, sph_rad, 0.495*PI, sph_xoffset); |
| 564 |
printf("\nvoid brighttext front_text\n3 helvet.fnt . FRONT\n0\n"); |
| 565 |
printf("12\n\t%f %f 0\n\t%f 0 0\n\t0 %f 0\n\t.01 1 -.1\n", |
| 566 |
-.22*sph_rad + sph_xoffset, -1.4*sph_rad, |
| 567 |
.35/5.*sph_rad, -1.6*.35/5.*sph_rad); |
| 568 |
printf("\nfront_text alias front_label_mat vellum\n"); |
| 569 |
printf("\nfront_label_mat polygon front_label\n0\n0\n12"); |
| 570 |
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
| 571 |
-.25*sph_rad + sph_xoffset, -1.3*sph_rad, |
| 572 |
-.25*sph_rad + sph_xoffset, (-1.4-1.6*.35/5.-.1)*sph_rad, |
| 573 |
.25*sph_rad + sph_xoffset, (-1.4-1.6*.35/5.-.1)*sph_rad, |
| 574 |
.25*sph_rad + sph_xoffset, -1.3*sph_rad ); |
| 575 |
} |
| 576 |
if (back_comp) { |
| 577 |
printf( |
| 578 |
"\n!genrev %s Back \"R*cos(A*t)\" \"R*sin(A*t)\" %d -e \"R:%g;A:%f\" -s | xform -t %g 0 0\n", |
| 579 |
sph_mat, nsegs, sph_rad, 0.495*PI, -sph_xoffset); |
| 580 |
printf("\nvoid brighttext back_text\n3 helvet.fnt . BACK\n0\n"); |
| 581 |
printf("12\n\t%f %f 0\n\t%f 0 0\n\t0 %f 0\n\t.01 1 -.1\n", |
| 582 |
-.22*sph_rad - sph_xoffset, -1.4*sph_rad, |
| 583 |
.35/4.*sph_rad, -1.6*.35/4.*sph_rad); |
| 584 |
printf("\nback_text alias back_label_mat vellum\n"); |
| 585 |
printf("\nback_label_mat polygon back_label\n0\n0\n12"); |
| 586 |
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
| 587 |
-.25*sph_rad - sph_xoffset, -1.3*sph_rad, |
| 588 |
-.25*sph_rad - sph_xoffset, (-1.4-1.6*.35/4.-.1)*sph_rad, |
| 589 |
.25*sph_rad - sph_xoffset, (-1.4-1.6*.35/4.-.1)*sph_rad, |
| 590 |
.25*sph_rad - sph_xoffset, -1.3*sph_rad ); |
| 591 |
} |
| 592 |
} |
| 593 |
|
| 594 |
/* Put out falsecolor scale and name label */ |
| 595 |
static void |
| 596 |
put_scale(void) |
| 597 |
{ |
| 598 |
const double max_log10 = log10(overall_max); |
| 599 |
const double leg_width = 2.*.75*(fabs(sph_xoffset) - sph_rad); |
| 600 |
const double leg_height = 2.*sph_rad; |
| 601 |
const int text_lines = 6; |
| 602 |
const int text_digits = 8; |
| 603 |
char fmt[16]; |
| 604 |
int i; |
| 605 |
|
| 606 |
printf("\n# BSDF legend with falsecolor scale\n"); |
| 607 |
printf("\nvoid colorfunc lscale\n10 sca_red(Py) sca_grn(Py) sca_blu(Py)"); |
| 608 |
printf("\n\tbsdf2rad.cal -s %f -t 0 %f 0\n0\n0\n", leg_height, -.5*leg_height); |
| 609 |
sprintf(fmt, "%%.%df", text_digits-3); |
| 610 |
for (i = 0; i < text_lines; i++) { |
| 611 |
char vbuf[16]; |
| 612 |
sprintf(vbuf, fmt, pow(10., (i+.5)/text_lines*(max_log10-min_log10)+min_log10)); |
| 613 |
printf("\nlscale brighttext lscale\n"); |
| 614 |
printf("3 helvet.fnt . %s\n0\n12\n", vbuf); |
| 615 |
printf("\t%f %f 0\n", -.45*leg_width, ((i+.9)/text_lines-.5)*leg_height); |
| 616 |
printf("\t%f 0 0\n", .8*leg_width/strlen(vbuf)); |
| 617 |
printf("\t0 %f 0\n", -.9/text_lines*leg_height); |
| 618 |
printf("\t.01 1 -.1\n"); |
| 619 |
} |
| 620 |
printf("\nlscale alias legend_mat vellum\n"); |
| 621 |
printf("\nlegend_mat polygon legend\n0\n0\n12"); |
| 622 |
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
| 623 |
-.5*leg_width, .5*leg_height, |
| 624 |
-.5*leg_width, -.5*leg_height, |
| 625 |
.5*leg_width, -.5*leg_height, |
| 626 |
.5*leg_width, .5*leg_height); |
| 627 |
printf("\nvoid brighttext BSDFtitle\n3 helvet.fnt . BSDF\n0\n12\n"); |
| 628 |
printf("\t%f %f 0\n", -.25*leg_width, .7*leg_height); |
| 629 |
printf("\t%f 0 0\n", .4/4.*leg_width); |
| 630 |
printf("\t0 %f 0\n", -.1*leg_height); |
| 631 |
printf("\t.01 1 -.1\n"); |
| 632 |
printf("\nBSDFtitle alias title_mat vellum\n"); |
| 633 |
printf("\ntitle_mat polygon title\n0\n0\n12"); |
| 634 |
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
| 635 |
-.3*leg_width, .75*leg_height, |
| 636 |
-.3*leg_width, .55*leg_height, |
| 637 |
.3*leg_width, .55*leg_height, |
| 638 |
.3*leg_width, .75*leg_height); |
| 639 |
if (!bsdf_name[0]) |
| 640 |
return; |
| 641 |
printf("\nvoid brighttext BSDFname\n3 helvet.fnt . \"%s\"\n0\n12\n", bsdf_name); |
| 642 |
printf("\t%f %f 0\n", -.95*leg_width, -.6*leg_height); |
| 643 |
printf("\t%f 0 0\n", 1.8/strlen(bsdf_name)*leg_width); |
| 644 |
printf("\t0 %f 0\n", -.1*leg_height); |
| 645 |
printf("\t.01 1 -.1\n"); |
| 646 |
printf("\nBSDFname alias name_mat vellum\n"); |
| 647 |
printf("\nname_mat polygon name\n0\n0\n12"); |
| 648 |
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
| 649 |
-leg_width, -.55*leg_height, |
| 650 |
-leg_width, -.75*leg_height, |
| 651 |
leg_width, -.75*leg_height, |
| 652 |
leg_width, -.55*leg_height); |
| 653 |
} |
| 654 |
|
| 655 |
/* Convert MGF to Radiance in output */ |
| 656 |
static void |
| 657 |
convert_mgf(const char *mgfdata) |
| 658 |
{ |
| 659 |
int len = strlen(mgfdata); |
| 660 |
char mgfn[128]; |
| 661 |
char radfn[128]; |
| 662 |
char cmdbuf[256]; |
| 663 |
float xmin, xmax, ymin, ymax, zmin, zmax; |
| 664 |
double max_dim; |
| 665 |
int fd; |
| 666 |
FILE *fp; |
| 667 |
|
| 668 |
if (!len) return; |
| 669 |
strcpy(mgfn, tfile_name("geom", ".mgf", 0)); |
| 670 |
fd = open(mgfn, O_WRONLY|O_CREAT, 0666); |
| 671 |
if (fd < 0 || write(fd, mgfdata, len) != len) { |
| 672 |
fprintf(stderr, "%s: cannot write file '%s'\n", |
| 673 |
progname, mgfn); |
| 674 |
return; |
| 675 |
} |
| 676 |
close(fd); |
| 677 |
strcpy(radfn, tfile_name("geom", ".rad", 0)); |
| 678 |
sprintf(cmdbuf, "mgf2rad %s > %s", mgfn, radfn); |
| 679 |
if (!run_cmd(cmdbuf)) |
| 680 |
return; |
| 681 |
sprintf(cmdbuf, "getbbox -w -h %s", radfn); |
| 682 |
if ((fp = popen(cmdbuf, "r")) == NULL || |
| 683 |
fscanf(fp, "%f %f %f %f %f %f", |
| 684 |
&xmin, &xmax, &ymin, &ymax, &zmin, &zmax) != 6 |
| 685 |
|| pclose(fp) < 0) { |
| 686 |
fprintf(stderr, "%s: error reading from command: %s\n", |
| 687 |
progname, cmdbuf); |
| 688 |
return; |
| 689 |
} |
| 690 |
max_dim = ymax - ymin; |
| 691 |
if (xmax - xmin > max_dim) |
| 692 |
max_dim = xmax - xmin; |
| 693 |
if (front_comp) { |
| 694 |
printf("\n# BSDF system geometry (front view)\n"); |
| 695 |
sprintf(cmdbuf, "xform -t %f %f %f -s %f -t %f %f 0 %s", |
| 696 |
-.5*(xmin+xmax), -.5*(ymin+ymax), -zmax, |
| 697 |
1.5*sph_rad/max_dim, |
| 698 |
sph_xoffset, -2.5*sph_rad, |
| 699 |
radfn); |
| 700 |
if (!run_cmd(cmdbuf)) |
| 701 |
return; |
| 702 |
} |
| 703 |
if (back_comp) { |
| 704 |
printf("\n# BSDF system geometry (back view)\n"); |
| 705 |
sprintf(cmdbuf, "xform -t %f %f %f -s %f -ry 180 -t %f %f 0 %s", |
| 706 |
-.5*(xmin+xmax), -.5*(ymin+ymax), -zmin, |
| 707 |
1.5*sph_rad/max_dim, |
| 708 |
-sph_xoffset, -2.5*sph_rad, |
| 709 |
radfn); |
| 710 |
if (!run_cmd(cmdbuf)) |
| 711 |
return; |
| 712 |
} |
| 713 |
} |
| 714 |
|
| 715 |
/* Check RBF input header line & get minimum BSDF value */ |
| 716 |
static int |
| 717 |
rbf_headline(char *s, void *p) |
| 718 |
{ |
| 719 |
char fmt[64]; |
| 720 |
|
| 721 |
if (formatval(fmt, s)) { |
| 722 |
if (strcmp(fmt, BSDFREP_FMT)) |
| 723 |
return(-1); |
| 724 |
return(0); |
| 725 |
} |
| 726 |
if (!strncmp(s, "IO_SIDES=", 9)) { |
| 727 |
sscanf(s+9, "%d %d", &input_orient, &output_orient); |
| 728 |
if (input_orient == output_orient) { |
| 729 |
if (input_orient > 0) |
| 730 |
front_comp |= SDsampR; |
| 731 |
else |
| 732 |
back_comp |= SDsampR; |
| 733 |
} else if (input_orient > 0) |
| 734 |
front_comp |= SDsampT; |
| 735 |
else |
| 736 |
back_comp |= SDsampT; |
| 737 |
return(0); |
| 738 |
} |
| 739 |
if (!strncmp(s, "BSDFMIN=", 8)) { |
| 740 |
sscanf(s+8, "%lf", &bsdf_min); |
| 741 |
if (bsdf_min < overall_min) |
| 742 |
overall_min = bsdf_min; |
| 743 |
return(0); |
| 744 |
} |
| 745 |
return(0); |
| 746 |
} |
| 747 |
|
| 748 |
/* Produce a Radiance model plotting the given BSDF representation */ |
| 749 |
int |
| 750 |
main(int argc, char *argv[]) |
| 751 |
{ |
| 752 |
int inpXML = -1; |
| 753 |
SDData myBSDF; |
| 754 |
int n; |
| 755 |
/* check arguments */ |
| 756 |
progname = argv[0]; |
| 757 |
if (argc > 1 && (n = strlen(argv[1])-4) > 0) { |
| 758 |
if (!strcasecmp(argv[1]+n, ".xml")) |
| 759 |
inpXML = 1; |
| 760 |
else if (!strcasecmp(argv[1]+n, ".sir")) |
| 761 |
inpXML = 0; |
| 762 |
} |
| 763 |
if (inpXML < 0 || inpXML & (argc > 2)) { |
| 764 |
fprintf(stderr, "Usage: %s bsdf.xml > output.rad\n", progname); |
| 765 |
fprintf(stderr, " Or: %s hemi1.sir hemi2.sir .. > output.rad\n", progname); |
| 766 |
return(1); |
| 767 |
} |
| 768 |
fputs("# ", stdout); /* copy our command */ |
| 769 |
printargs(argc, argv, stdout); |
| 770 |
/* evaluate BSDF */ |
| 771 |
if (inpXML) { |
| 772 |
SDclearBSDF(&myBSDF, argv[1]); |
| 773 |
if (SDreportError(SDloadFile(&myBSDF, argv[1]), stderr)) |
| 774 |
return(1); |
| 775 |
if (myBSDF.rf != NULL) front_comp |= SDsampR; |
| 776 |
if (myBSDF.tf != NULL) front_comp |= SDsampT; |
| 777 |
if (myBSDF.rb != NULL) back_comp |= SDsampR; |
| 778 |
if (myBSDF.tb != NULL) back_comp |= SDsampT; |
| 779 |
if (!front_comp & !back_comp) { |
| 780 |
fprintf(stderr, "%s: nothing to plot in '%s'\n", |
| 781 |
progname, argv[1]); |
| 782 |
return(1); |
| 783 |
} |
| 784 |
if (front_comp & SDsampR && myBSDF.rLambFront.cieY < overall_min*PI) |
| 785 |
overall_min = myBSDF.rLambFront.cieY/PI; |
| 786 |
if (back_comp & SDsampR && myBSDF.rLambBack.cieY < overall_min*PI) |
| 787 |
overall_min = myBSDF.rLambBack.cieY/PI; |
| 788 |
if ((front_comp|back_comp) & SDsampT && |
| 789 |
myBSDF.tLamb.cieY < overall_min*PI) |
| 790 |
overall_min = myBSDF.tLamb.cieY/PI; |
| 791 |
set_minlog(); |
| 792 |
if (!build_wBSDF(&myBSDF)) |
| 793 |
return(1); |
| 794 |
if (myBSDF.matn[0]) |
| 795 |
strcpy(bsdf_name, myBSDF.matn); |
| 796 |
else |
| 797 |
strcpy(bsdf_name, myBSDF.name); |
| 798 |
strcpy(bsdf_manuf, myBSDF.makr); |
| 799 |
put_matBSDF(argv[1]); |
| 800 |
} else { |
| 801 |
FILE *fp; |
| 802 |
for (n = 1; n < argc; n++) { |
| 803 |
fp = fopen(argv[n], "rb"); |
| 804 |
if (fp == NULL) { |
| 805 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
| 806 |
progname, argv[n]); |
| 807 |
return(1); |
| 808 |
} |
| 809 |
if (getheader(fp, rbf_headline, NULL) < 0) { |
| 810 |
fprintf(stderr, "%s: bad BSDF interpolant '%s'\n", |
| 811 |
progname, argv[n]); |
| 812 |
return(1); |
| 813 |
} |
| 814 |
fclose(fp); |
| 815 |
} |
| 816 |
set_minlog(); |
| 817 |
for (n = 1; n < argc; n++) { |
| 818 |
fp = fopen(argv[n], "rb"); |
| 819 |
if (!load_bsdf_rep(fp)) |
| 820 |
return(1); |
| 821 |
fclose(fp); |
| 822 |
if (!build_wRBF()) |
| 823 |
return(1); |
| 824 |
} |
| 825 |
put_matBSDF(NULL); |
| 826 |
} |
| 827 |
put_source(); /* before hemispheres & labels */ |
| 828 |
put_hemispheres(); |
| 829 |
put_scale(); |
| 830 |
if (inpXML && myBSDF.mgf) |
| 831 |
convert_mgf(myBSDF.mgf); |
| 832 |
if (!put_BSDFs()) |
| 833 |
return(1); |
| 834 |
cleanup_tmp(); |
| 835 |
return(0); |
| 836 |
} |
