| 1 |
#ifndef lint
|
| 2 |
static const char RCSid[] = "$Id: pmapdump.c,v 2.17 2020/08/07 01:21:13 rschregle Exp $";
|
| 3 |
#endif
|
| 4 |
|
| 5 |
/*
|
| 6 |
======================================================================
|
| 7 |
Dump photon maps as RADIANCE scene description or ASCII point list
|
| 8 |
to stdout
|
| 9 |
|
| 10 |
Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
|
| 11 |
(c) Fraunhofer Institute for Solar Energy Systems,
|
| 12 |
supported by the German Research Foundation
|
| 13 |
(DFG LU-204/10-2, "Fassadenintegrierte Regelsysteme FARESYS")
|
| 14 |
(c) Lucerne University of Applied Sciences and Arts,
|
| 15 |
supported by the Swiss National Science Foundation
|
| 16 |
(SNSF #147053, "Daylight Redirecting Components")
|
| 17 |
(c) Tokyo University of Science,
|
| 18 |
supported by the JSPS Grants-in-Aid for Scientific Research
|
| 19 |
(KAKENHI JP19KK0115, "Three-Dimensional Light Flow")
|
| 20 |
======================================================================
|
| 21 |
|
| 22 |
$Id: pmapdump.c,v 2.17 2020/08/07 01:21:13 rschregle Exp $
|
| 23 |
*/
|
| 24 |
|
| 25 |
|
| 26 |
|
| 27 |
#include "pmap.h"
|
| 28 |
#include "pmapio.h"
|
| 29 |
#include "rtio.h"
|
| 30 |
#include "resolu.h"
|
| 31 |
#include "random.h"
|
| 32 |
#include "math.h"
|
| 33 |
|
| 34 |
|
| 35 |
/* Defaults */
|
| 36 |
/* Sphere radius as fraction of avg. intersphere dist */
|
| 37 |
/* Relative scale for sphere radius (fudge factor) */
|
| 38 |
/* Number of spheres */
|
| 39 |
#define RADCOEFF 0.05
|
| 40 |
#define RADSCALE 1.0
|
| 41 |
#define NSPHERES 10000
|
| 42 |
|
| 43 |
/* Format for optional ASCII output as XYZ RGB points */
|
| 44 |
#define POINTFMT "%g\t%g\t%g\t%g\t%g\t%g\n"
|
| 45 |
|
| 46 |
/* RADIANCE material and object defs for each photon type */
|
| 47 |
typedef struct {
|
| 48 |
char *mat, *obj;
|
| 49 |
} RadianceDef;
|
| 50 |
|
| 51 |
const RadianceDef radDefs [] = {
|
| 52 |
{ "void glow mat.global\n0\n0\n4 %g %g %g 0\n",
|
| 53 |
"mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n"
|
| 54 |
},
|
| 55 |
{ "void glow mat.pglobal\n0\n0\n4 %g %g %g 0\n",
|
| 56 |
"mat.pglobal sphere obj.pglobal\n0\n0\n4 %g %g %g %g\n"
|
| 57 |
},
|
| 58 |
{ "void glow mat.caustic\n0\n0\n4 %g %g %g 0\n",
|
| 59 |
"mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n"
|
| 60 |
},
|
| 61 |
{ "void glow mat.volume\n0\n0\n4 %g %g %g 0\n",
|
| 62 |
"mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n"
|
| 63 |
},
|
| 64 |
{ "void glow mat.direct\n0\n0\n4 %g %g %g 0\n",
|
| 65 |
"mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n"
|
| 66 |
},
|
| 67 |
{ "void glow mat.contrib\n0\n0\n4 %g %g %g 0\n",
|
| 68 |
"mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n"
|
| 69 |
}
|
| 70 |
};
|
| 71 |
|
| 72 |
|
| 73 |
/* Default colour codes are as follows: global = blue
|
| 74 |
precomp global = cyan
|
| 75 |
caustic = red
|
| 76 |
volume = green
|
| 77 |
direct = magenta
|
| 78 |
contrib = yellow */
|
| 79 |
const COLOR colDefs [] = {
|
| 80 |
{0.25, 0.25, 2}, {0.1, 1, 1}, {1, 0.1, 0.1},
|
| 81 |
{0.1, 1, 0.1}, {1, 0.1, 1}, {1, 1, 0.1}
|
| 82 |
};
|
| 83 |
|
| 84 |
|
| 85 |
static int setBool(char *str, unsigned pos, unsigned *var)
|
| 86 |
{
|
| 87 |
switch ((str) [pos]) {
|
| 88 |
case '\0':
|
| 89 |
*var = !*var;
|
| 90 |
break;
|
| 91 |
case 'y': case 'Y': case 't': case 'T': case '+': case '1':
|
| 92 |
*var = 1;
|
| 93 |
break;
|
| 94 |
case 'n': case 'N': case 'f': case 'F': case '-': case '0':
|
| 95 |
*var = 0;
|
| 96 |
break;
|
| 97 |
default:
|
| 98 |
return 0;
|
| 99 |
}
|
| 100 |
|
| 101 |
return 1;
|
| 102 |
}
|
| 103 |
|
| 104 |
|
| 105 |
int main (int argc, char** argv)
|
| 106 |
{
|
| 107 |
char format [MAXFMTLEN];
|
| 108 |
RREAL rad, radScale = RADSCALE, extent, dumpRatio;
|
| 109 |
unsigned arg, j, ptype, dim, fluxCol = 0, points = 0;
|
| 110 |
long numSpheres = NSPHERES;
|
| 111 |
COLOR col = {0, 0, 0};
|
| 112 |
FILE *pmapFile;
|
| 113 |
PhotonMap pm;
|
| 114 |
PhotonPrimary pri;
|
| 115 |
Photon p;
|
| 116 |
#ifdef PMAP_OOC
|
| 117 |
char leafFname [1024];
|
| 118 |
#endif
|
| 119 |
|
| 120 |
if (argc < 2) {
|
| 121 |
puts("Dump photon maps as RADIANCE scene description "
|
| 122 |
"or ASCII point list\n");
|
| 123 |
printf("Usage: %s "
|
| 124 |
"[-a] [-r radscale1] [-n num1] "
|
| 125 |
"[-f | -c rcol1 gcol1 bcol1] pmap1 "
|
| 126 |
"[-a] [-r radscale2] [-n num2] "
|
| 127 |
"[-f | -c rcol2 gcol2 bcol2] pmap2 "
|
| 128 |
"...\n", argv [0]);
|
| 129 |
return 1;
|
| 130 |
}
|
| 131 |
|
| 132 |
for (arg = 1; arg < argc; arg++) {
|
| 133 |
/* Parse options */
|
| 134 |
if (argv [arg][0] == '-') {
|
| 135 |
switch (argv [arg][1]) {
|
| 136 |
case 'a':
|
| 137 |
if (!setBool(argv [arg], 2, &points))
|
| 138 |
error(USER, "invalid option syntax at -a");
|
| 139 |
break;
|
| 140 |
case 'r':
|
| 141 |
if ((radScale = atof(argv [++arg])) <= 0)
|
| 142 |
error(USER, "invalid radius scale");
|
| 143 |
break;
|
| 144 |
|
| 145 |
case 'n':
|
| 146 |
if ((numSpheres = parseMultiplier(argv [++arg])) <= 0)
|
| 147 |
error(USER, "invalid number of points/spheres");
|
| 148 |
break;
|
| 149 |
|
| 150 |
case 'c':
|
| 151 |
if (fluxCol)
|
| 152 |
error(USER, "-f and -c are mutually exclusive");
|
| 153 |
|
| 154 |
if (badarg(argc - arg - 1, &argv [arg + 1], "fff"))
|
| 155 |
error(USER, "invalid RGB colour");
|
| 156 |
|
| 157 |
for (j = 0; j < 3; j++)
|
| 158 |
col [j] = atof(argv [++arg]);
|
| 159 |
break;
|
| 160 |
|
| 161 |
case 'f':
|
| 162 |
if (intens(col) > 0)
|
| 163 |
error(USER, "-f and -c are mutually exclusive");
|
| 164 |
|
| 165 |
if (!setBool(argv [arg], 2, &fluxCol))
|
| 166 |
error(USER, "invalid option syntax at -f");
|
| 167 |
break;
|
| 168 |
|
| 169 |
default:
|
| 170 |
sprintf(errmsg, "unknown option %s", argv [arg]);
|
| 171 |
error(USER, errmsg);
|
| 172 |
return -1;
|
| 173 |
}
|
| 174 |
|
| 175 |
continue;
|
| 176 |
}
|
| 177 |
|
| 178 |
/* Open next photon map file */
|
| 179 |
if (!(pmapFile = fopen(argv [arg], "rb"))) {
|
| 180 |
sprintf(errmsg, "can't open %s", argv [arg]);
|
| 181 |
error(SYSTEM, errmsg);
|
| 182 |
}
|
| 183 |
|
| 184 |
/* Get format string */
|
| 185 |
strcpy(format, PMAP_FORMAT_GLOB);
|
| 186 |
if (checkheader(pmapFile, format, NULL) != 1) {
|
| 187 |
sprintf(errmsg, "photon map file %s has unknown format %s",
|
| 188 |
argv [arg], format);
|
| 189 |
error(USER, errmsg);
|
| 190 |
}
|
| 191 |
|
| 192 |
/* Identify photon map type from format string */
|
| 193 |
for (ptype = 0;
|
| 194 |
ptype < NUM_PMAP_TYPES && strcmp(pmapFormat [ptype], format);
|
| 195 |
ptype++);
|
| 196 |
|
| 197 |
if (!validPmapType(ptype)) {
|
| 198 |
sprintf(errmsg, "file %s contains an unknown photon map type",
|
| 199 |
argv [arg]);
|
| 200 |
error(USER, errmsg);
|
| 201 |
}
|
| 202 |
|
| 203 |
/* Get file format version and check for compatibility */
|
| 204 |
if (strcmp(getstr(format, pmapFile), PMAP_FILEVER))
|
| 205 |
error(USER, "incompatible photon map file format");
|
| 206 |
|
| 207 |
if (!points) {
|
| 208 |
/* Dump command line as comment */
|
| 209 |
fputs("# ", stdout);
|
| 210 |
printargs(argc, argv, stdout);
|
| 211 |
fputc('\n', stdout);
|
| 212 |
}
|
| 213 |
|
| 214 |
/* Set point/sphere colour if independent of photon flux,
|
| 215 |
output RADIANCE material def if required */
|
| 216 |
if (!fluxCol) {
|
| 217 |
if (intens(col) <= 0)
|
| 218 |
copycolor(col, colDefs [ptype]);
|
| 219 |
if (!points) {
|
| 220 |
printf(radDefs [ptype].mat, col [0], col [1], col [2]);
|
| 221 |
fputc('\n', stdout);
|
| 222 |
}
|
| 223 |
}
|
| 224 |
|
| 225 |
/* Get number of photons as fixed size, which possibly results in
|
| 226 |
* padding of MSB with 0 on some platforms. Unlike sizeof() however,
|
| 227 |
* this ensures portability since this value may span 32 or 64 bits
|
| 228 |
* depending on platform. */
|
| 229 |
pm.numPhotons = getint(PMAP_LONGSIZE, pmapFile);
|
| 230 |
|
| 231 |
/* Skip avg photon flux */
|
| 232 |
for (j = 0; j < 3; j++)
|
| 233 |
getflt(pmapFile);
|
| 234 |
|
| 235 |
/* Get distribution extent (min & max photon positions) */
|
| 236 |
for (j = 0; j < 3; j++) {
|
| 237 |
pm.minPos [j] = getflt(pmapFile);
|
| 238 |
pm.maxPos [j] = getflt(pmapFile);
|
| 239 |
}
|
| 240 |
|
| 241 |
/* Skip centre of gravity, and avg photon dist to it */
|
| 242 |
for (j = 0; j < 4; j++)
|
| 243 |
getflt(pmapFile);
|
| 244 |
|
| 245 |
/* Sphere radius based on avg intersphere dist depending on
|
| 246 |
whether the distribution occupies a 1D line (!), a 2D plane,
|
| 247 |
or 3D volume (= sphere distrib density ^-1/d, where d is the
|
| 248 |
dimensionality of the distribution) */
|
| 249 |
for (j = 0, extent = 1.0, dim = 0; j < 3; j++) {
|
| 250 |
rad = pm.maxPos [j] - pm.minPos [j];
|
| 251 |
|
| 252 |
if (rad > FTINY) {
|
| 253 |
dim++;
|
| 254 |
extent *= rad;
|
| 255 |
}
|
| 256 |
}
|
| 257 |
|
| 258 |
rad = radScale * RADCOEFF * pow(extent / numSpheres, 1./dim);
|
| 259 |
|
| 260 |
/* Photon dump probability to satisfy target sphere count */
|
| 261 |
dumpRatio = min(1, (float)numSpheres / pm.numPhotons);
|
| 262 |
|
| 263 |
/* Skip primary rays */
|
| 264 |
pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile);
|
| 265 |
while (pm.numPrimary-- > 0) {
|
| 266 |
/* Skip source index & incident dir */
|
| 267 |
getint(sizeof(pri.srcIdx), pmapFile);
|
| 268 |
#ifdef PMAP_PRIMARYDIR
|
| 269 |
/* Skip primary incident dir */
|
| 270 |
getint(sizeof(pri.dir), pmapFile);
|
| 271 |
#endif
|
| 272 |
#ifdef PMAP_PRIMARYPOS
|
| 273 |
/* Skip primary hitpoint */
|
| 274 |
for (j = 0; j < 3; j++)
|
| 275 |
getflt(pmapFile);
|
| 276 |
#endif
|
| 277 |
}
|
| 278 |
|
| 279 |
#ifdef PMAP_OOC
|
| 280 |
/* Open leaf file with filename derived from pmap, replace pmapFile
|
| 281 |
* (which is currently the node file) */
|
| 282 |
strncpy(leafFname, argv [arg], sizeof(leafFname) - 1);
|
| 283 |
strncat(leafFname, PMAP_OOC_LEAFSUFFIX, sizeof(leafFname) - 1);
|
| 284 |
fclose(pmapFile);
|
| 285 |
if (!(pmapFile = fopen(leafFname, "rb"))) {
|
| 286 |
sprintf(errmsg, "cannot open leaf file %s", leafFname);
|
| 287 |
error(SYSTEM, errmsg);
|
| 288 |
}
|
| 289 |
#endif
|
| 290 |
|
| 291 |
/* Read photons */
|
| 292 |
while (pm.numPhotons-- > 0) {
|
| 293 |
#ifdef PMAP_OOC
|
| 294 |
/* Get entire photon record from ooC octree leaf file
|
| 295 |
!!! OOC PMAP FILES CURRENTLY DON'T USE PORTABLE I/O !!! */
|
| 296 |
if (!fread(&p, sizeof(p), 1, pmapFile)) {
|
| 297 |
sprintf(errmsg, "error reading OOC leaf file %s", leafFname);
|
| 298 |
error(SYSTEM, errmsg);
|
| 299 |
}
|
| 300 |
#else /* kd-tree */
|
| 301 |
/* Get photon position */
|
| 302 |
for (j = 0; j < 3; j++)
|
| 303 |
p.pos [j] = getflt(pmapFile);
|
| 304 |
|
| 305 |
/* Get photon normal (currently not used) */
|
| 306 |
for (j = 0; j < 3; j++)
|
| 307 |
p.norm [j] = getint(1, pmapFile);
|
| 308 |
|
| 309 |
/* Get photon flux */
|
| 310 |
#ifdef PMAP_FLOAT_FLUX
|
| 311 |
for (j = 0; j < 3; j++)
|
| 312 |
p.flux [j] = getflt(pmapFile);
|
| 313 |
#else
|
| 314 |
for (j = 0; j < 4; j++)
|
| 315 |
p.flux [j] = getint(1, pmapFile);
|
| 316 |
#endif
|
| 317 |
|
| 318 |
|
| 319 |
|
| 320 |
/* Skip primary ray index */
|
| 321 |
getint(sizeof(p.primary), pmapFile);
|
| 322 |
|
| 323 |
/* Skip flags */
|
| 324 |
getint(sizeof(p.flags), pmapFile);
|
| 325 |
#endif
|
| 326 |
|
| 327 |
/* Dump photon probabilistically acc. to target sphere count */
|
| 328 |
if (frandom() <= dumpRatio) {
|
| 329 |
if (fluxCol) {
|
| 330 |
/* Get photon flux */
|
| 331 |
getPhotonFlux(&p, col);
|
| 332 |
/* Scale by dumpRatio for energy conservation */
|
| 333 |
scalecolor(col, 1.0 / dumpRatio);
|
| 334 |
}
|
| 335 |
|
| 336 |
if (!points) {
|
| 337 |
if (fluxCol) {
|
| 338 |
/* Dump material def if variable (depends on flux) */
|
| 339 |
printf(radDefs [ptype].mat, col [0], col [1], col [2]);
|
| 340 |
fputc('\n', stdout);
|
| 341 |
}
|
| 342 |
printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2],
|
| 343 |
rad);
|
| 344 |
fputc('\n', stdout);
|
| 345 |
}
|
| 346 |
else /* Dump as XYZ RGB point */
|
| 347 |
printf(POINTFMT, p.pos [0], p.pos [1], p.pos [2],
|
| 348 |
col [0], col [1] ,col [2]);
|
| 349 |
}
|
| 350 |
|
| 351 |
if (ferror(pmapFile) || feof(pmapFile)) {
|
| 352 |
sprintf(errmsg, "error reading %s", argv [arg]);
|
| 353 |
error(USER, errmsg);
|
| 354 |
}
|
| 355 |
}
|
| 356 |
|
| 357 |
fclose(pmapFile);
|
| 358 |
|
| 359 |
/* Reset defaults for next dump */
|
| 360 |
radScale = RADSCALE;
|
| 361 |
numSpheres = NSPHERES;
|
| 362 |
col [0] = col [1] = col [2] = 0;
|
| 363 |
fluxCol = points = 0;
|
| 364 |
}
|
| 365 |
|
| 366 |
return 0;
|
| 367 |
}
|
