| 1 |
greg |
2.4 |
#ifndef lint |
| 2 |
|
|
static const char RCSid[] = "$Id$"; |
| 3 |
|
|
#endif |
| 4 |
greg |
2.1 |
/* |
| 5 |
rschregle |
2.3 |
================================================================== |
| 6 |
greg |
2.1 |
Dump photon maps as RADIANCE scene description to stdout |
| 7 |
|
|
|
| 8 |
|
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 9 |
|
|
(c) Fraunhofer Institute for Solar Energy Systems, |
| 10 |
rschregle |
2.3 |
(c) Lucerne University of Applied Sciences and Arts, |
| 11 |
|
|
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 12 |
greg |
2.1 |
================================================================== |
| 13 |
|
|
|
| 14 |
greg |
2.4 |
$Id: pmapdump.c,v 2.3 2015/05/08 13:20:23 rschregle Exp $ |
| 15 |
greg |
2.1 |
*/ |
| 16 |
|
|
|
| 17 |
|
|
|
| 18 |
|
|
|
| 19 |
|
|
#include "pmapio.h" |
| 20 |
|
|
#include "pmapparm.h" |
| 21 |
|
|
#include "pmaptype.h" |
| 22 |
|
|
#include "rtio.h" |
| 23 |
|
|
#include "resolu.h" |
| 24 |
|
|
#include "random.h" |
| 25 |
greg |
2.2 |
#include "math.h" |
| 26 |
greg |
2.1 |
|
| 27 |
|
|
|
| 28 |
|
|
/* Defaults */ |
| 29 |
|
|
/* Sphere radius as fraction of avg. intersphere dist */ |
| 30 |
|
|
/* Relative scale for sphere radius (fudge factor) */ |
| 31 |
|
|
/* Number of spheres */ |
| 32 |
|
|
#define RADCOEFF 0.05 |
| 33 |
|
|
#define RADSCALE 1.0 |
| 34 |
|
|
#define NSPHERES 10000 |
| 35 |
|
|
|
| 36 |
|
|
|
| 37 |
|
|
/* RADIANCE material and object defs for each photon type */ |
| 38 |
|
|
typedef struct { |
| 39 |
|
|
char *mat, *obj; |
| 40 |
|
|
} RadianceDef; |
| 41 |
|
|
|
| 42 |
|
|
|
| 43 |
greg |
2.4 |
static char header [] = "$Revision: 2.3 $"; |
| 44 |
greg |
2.1 |
|
| 45 |
|
|
|
| 46 |
|
|
/* Colour code is as follows: global = blue |
| 47 |
|
|
precomp global = cyan |
| 48 |
|
|
caustic = red |
| 49 |
|
|
volume = green |
| 50 |
|
|
direct = magenta |
| 51 |
|
|
contrib = yellow */ |
| 52 |
|
|
const RadianceDef radDefs [] = { |
| 53 |
|
|
{ "void plastic mat.global\n0\n0\n5 0 0 1 0 0\n", |
| 54 |
|
|
"mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n" |
| 55 |
|
|
}, |
| 56 |
|
|
{ "void plastic mat.pglobal\n0\n0\n5 0 1 1 0 0\n", |
| 57 |
|
|
"mat.pglobal sphere obj.global\n0\n0\n4 %g %g %g %g\n" |
| 58 |
|
|
}, |
| 59 |
|
|
{ "void plastic mat.caustic\n0\n0\n5 1 0 0 0 0\n", |
| 60 |
|
|
"mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n" |
| 61 |
|
|
}, |
| 62 |
|
|
{ "void plastic mat.volume\n0\n0\n5 0 1 0 0 0\n", |
| 63 |
|
|
"mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n" |
| 64 |
|
|
}, |
| 65 |
|
|
{ "void plastic mat.direct\n0\n0\n5 1 0 1 0 0\n", |
| 66 |
|
|
"mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n" |
| 67 |
|
|
}, |
| 68 |
|
|
{ "void plastic mat.contrib\n0\n0\n5 1 1 0 0 0\n", |
| 69 |
|
|
"mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n" |
| 70 |
|
|
} |
| 71 |
|
|
}; |
| 72 |
|
|
|
| 73 |
|
|
|
| 74 |
|
|
|
| 75 |
|
|
int main (int argc, char** argv) |
| 76 |
|
|
{ |
| 77 |
|
|
char format [128]; |
| 78 |
|
|
RREAL rad, radScale = RADSCALE, vol, dumpRatio; |
| 79 |
|
|
FVECT minPos, maxPos; |
| 80 |
|
|
unsigned arg, j, ptype; |
| 81 |
|
|
long numPhotons, numSpheres = NSPHERES; |
| 82 |
|
|
FILE *pmapFile; |
| 83 |
|
|
Photon p; |
| 84 |
|
|
|
| 85 |
|
|
if (argc < 2) { |
| 86 |
|
|
puts("Dump photon maps as RADIANCE scene description\n"); |
| 87 |
|
|
printf("Usage: %s [-r radscale1] [-n nspheres1] pmap1 " |
| 88 |
|
|
"[-r radscale2] [-n nspheres2] pmap2 ...\n", argv [0]); |
| 89 |
|
|
return 1; |
| 90 |
|
|
} |
| 91 |
|
|
|
| 92 |
|
|
for (arg = 1; arg < argc; arg++) { |
| 93 |
|
|
/* Parse options */ |
| 94 |
|
|
if (argv [arg][0] == '-') { |
| 95 |
|
|
switch (argv [arg][1]) { |
| 96 |
|
|
case 'r': |
| 97 |
|
|
if ((radScale = atof(argv [++arg])) <= 0) |
| 98 |
|
|
error(USER, "invalid radius scale"); |
| 99 |
|
|
break; |
| 100 |
|
|
|
| 101 |
|
|
case 'n': |
| 102 |
|
|
if ((numSpheres = parseMultiplier(argv [++arg])) <= 0) |
| 103 |
|
|
error(USER, "invalid number of spheres"); |
| 104 |
|
|
break; |
| 105 |
|
|
|
| 106 |
|
|
default: |
| 107 |
|
|
sprintf(errmsg, "unknown option %s", argv [arg]); |
| 108 |
|
|
error(USER, errmsg); |
| 109 |
|
|
return -1; |
| 110 |
|
|
} |
| 111 |
|
|
|
| 112 |
|
|
continue; |
| 113 |
|
|
} |
| 114 |
|
|
|
| 115 |
|
|
/* Dump photon map */ |
| 116 |
|
|
if (!(pmapFile = fopen(argv [arg], "rb"))) { |
| 117 |
|
|
sprintf(errmsg, "can't open %s", argv [arg]); |
| 118 |
|
|
error(SYSTEM, errmsg); |
| 119 |
|
|
} |
| 120 |
|
|
|
| 121 |
|
|
/* Get format string */ |
| 122 |
|
|
strcpy(format, PMAP_FORMAT_GLOB); |
| 123 |
|
|
if (checkheader(pmapFile, format, NULL) != 1) { |
| 124 |
|
|
sprintf(errmsg, "photon map file %s has unknown format %s", |
| 125 |
|
|
argv [arg], format); |
| 126 |
|
|
error(USER, errmsg); |
| 127 |
|
|
} |
| 128 |
|
|
|
| 129 |
|
|
/* Identify photon map type from format string */ |
| 130 |
|
|
for (ptype = 0; |
| 131 |
|
|
strcmp(pmapFormat [ptype], format) && ptype < NUM_PMAP_TYPES; |
| 132 |
|
|
ptype++); |
| 133 |
|
|
|
| 134 |
|
|
if (!validPmapType(ptype)) { |
| 135 |
|
|
sprintf(errmsg, "file %s contains an unknown photon map type", |
| 136 |
|
|
argv [arg]); |
| 137 |
|
|
error(USER, errmsg); |
| 138 |
|
|
} |
| 139 |
|
|
|
| 140 |
|
|
/* Get file format version and check for compatibility */ |
| 141 |
|
|
if (getint(sizeof(PMAP_FILEVER), pmapFile) != PMAP_FILEVER) |
| 142 |
|
|
error(USER, "incompatible photon map file format"); |
| 143 |
|
|
|
| 144 |
|
|
/* Dump command line as comment */ |
| 145 |
|
|
fputs("# ", stdout); |
| 146 |
|
|
printargs(argc, argv, stdout); |
| 147 |
|
|
fputc('\n', stdout); |
| 148 |
|
|
|
| 149 |
|
|
/* Dump material def */ |
| 150 |
|
|
fputs(radDefs [ptype].mat, stdout); |
| 151 |
|
|
fputc('\n', stdout); |
| 152 |
|
|
|
| 153 |
|
|
/* Get number of photons (is this sizeof() hack portable?) */ |
| 154 |
|
|
numPhotons = getint(sizeof(((PhotonMap*)NULL) -> heapSize), pmapFile); |
| 155 |
|
|
|
| 156 |
|
|
/* Skip avg photon flux */ |
| 157 |
|
|
for (j = 0; j < 3; j++) |
| 158 |
|
|
getflt(pmapFile); |
| 159 |
|
|
|
| 160 |
|
|
/* Get distribution extent (min & max photon positions) */ |
| 161 |
|
|
for (j = 0; j < 3; j++) { |
| 162 |
|
|
minPos [j] = getflt(pmapFile); |
| 163 |
|
|
maxPos [j] = getflt(pmapFile); |
| 164 |
|
|
} |
| 165 |
|
|
|
| 166 |
|
|
/* Skip centre of gravity, and avg photon dist to it */ |
| 167 |
|
|
for (j = 0; j < 4; j++) |
| 168 |
|
|
getflt(pmapFile); |
| 169 |
|
|
|
| 170 |
|
|
/* Sphere radius based on avg intersphere dist |
| 171 |
|
|
(= sphere distrib density ^-1/3) */ |
| 172 |
|
|
vol = (maxPos [0] - minPos [0]) * (maxPos [1] - minPos [1]) * |
| 173 |
|
|
(maxPos [2] - minPos [2]); |
| 174 |
greg |
2.2 |
rad = radScale * RADCOEFF * pow(vol / numSpheres, 1./3.); |
| 175 |
greg |
2.1 |
|
| 176 |
|
|
/* Photon dump probability to satisfy target sphere count */ |
| 177 |
|
|
dumpRatio = numSpheres < numPhotons ? (float)numSpheres / numPhotons |
| 178 |
|
|
: 1; |
| 179 |
|
|
|
| 180 |
|
|
while (numPhotons-- > 0) { |
| 181 |
|
|
/* Get photon position */ |
| 182 |
|
|
for (j = 0; j < 3; j++) |
| 183 |
|
|
p.pos [j] = getflt(pmapFile); |
| 184 |
|
|
|
| 185 |
|
|
/* Dump photon probabilistically acc. to target sphere count */ |
| 186 |
|
|
if (frandom() <= dumpRatio) { |
| 187 |
|
|
printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2], rad); |
| 188 |
|
|
fputc('\n', stdout); |
| 189 |
|
|
} |
| 190 |
|
|
|
| 191 |
|
|
/* Skip photon normal and flux */ |
| 192 |
|
|
for (j = 0; j < 3; j++) |
| 193 |
|
|
getint(sizeof(p.norm [j]), pmapFile); |
| 194 |
|
|
|
| 195 |
|
|
#ifdef PMAP_FLOAT_FLUX |
| 196 |
|
|
for (j = 0; j < 3; j++) |
| 197 |
|
|
getflt(pmapFile); |
| 198 |
|
|
#else |
| 199 |
|
|
for (j = 0; j < 4; j++) |
| 200 |
|
|
getint(1, pmapFile); |
| 201 |
|
|
#endif |
| 202 |
|
|
|
| 203 |
|
|
/* Skip primary ray index */ |
| 204 |
|
|
getint(sizeof(p.primary), pmapFile); |
| 205 |
|
|
|
| 206 |
|
|
/* Skip flags */ |
| 207 |
|
|
getint(sizeof(p.flags), pmapFile); |
| 208 |
|
|
|
| 209 |
|
|
if (feof(pmapFile)) { |
| 210 |
|
|
sprintf(errmsg, "error reading %s", argv [arg]); |
| 211 |
|
|
error(USER, errmsg); |
| 212 |
|
|
} |
| 213 |
|
|
} |
| 214 |
|
|
|
| 215 |
|
|
fclose(pmapFile); |
| 216 |
|
|
|
| 217 |
|
|
/* Reset defaults for next dump */ |
| 218 |
|
|
radScale = RADSCALE; |
| 219 |
|
|
numSpheres = NSPHERES; |
| 220 |
|
|
} |
| 221 |
|
|
|
| 222 |
|
|
return 0; |
| 223 |
|
|
} |
