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#ifndef lint |
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static const char RCSid[] = "$Id: pmapdump.c,v 2.17 2020/08/07 01:21:13 rschregle Exp $"; |
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#endif |
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|
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/* |
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====================================================================== |
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Dump photon maps as RADIANCE scene description or ASCII point list |
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to stdout |
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|
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Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
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(c) Fraunhofer Institute for Solar Energy Systems, |
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supported by the German Research Foundation |
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(DFG LU-204/10-2, "Fassadenintegrierte Regelsysteme FARESYS") |
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(c) Lucerne University of Applied Sciences and Arts, |
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supported by the Swiss National Science Foundation |
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(SNSF #147053, "Daylight Redirecting Components") |
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(c) Tokyo University of Science, |
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supported by the JSPS Grants-in-Aid for Scientific Research |
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(KAKENHI JP19KK0115, "Three-Dimensional Light Flow") |
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====================================================================== |
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|
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$Id: pmapdump.c,v 2.17 2020/08/07 01:21:13 rschregle Exp $ |
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*/ |
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|
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|
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|
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#include "pmap.h" |
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#include "pmapio.h" |
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#include "rtio.h" |
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#include "resolu.h" |
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#include "random.h" |
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#include "math.h" |
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|
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|
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/* Defaults */ |
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/* Sphere radius as fraction of avg. intersphere dist */ |
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/* Relative scale for sphere radius (fudge factor) */ |
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/* Number of spheres */ |
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#define RADCOEFF 0.05 |
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#define RADSCALE 1.0 |
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#define NSPHERES 10000 |
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|
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/* Format for optional ASCII output as XYZ RGB points */ |
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#define POINTFMT "%g\t%g\t%g\t%g\t%g\t%g\n" |
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|
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/* RADIANCE material and object defs for each photon type */ |
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typedef struct { |
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char *mat, *obj; |
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} RadianceDef; |
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|
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const RadianceDef radDefs [] = { |
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{ "void glow mat.global\n0\n0\n4 %g %g %g 0\n", |
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"mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n" |
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}, |
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{ "void glow mat.pglobal\n0\n0\n4 %g %g %g 0\n", |
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"mat.pglobal sphere obj.pglobal\n0\n0\n4 %g %g %g %g\n" |
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}, |
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{ "void glow mat.caustic\n0\n0\n4 %g %g %g 0\n", |
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"mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n" |
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}, |
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{ "void glow mat.volume\n0\n0\n4 %g %g %g 0\n", |
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"mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n" |
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}, |
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{ "void glow mat.direct\n0\n0\n4 %g %g %g 0\n", |
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"mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n" |
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}, |
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{ "void glow mat.contrib\n0\n0\n4 %g %g %g 0\n", |
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"mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n" |
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} |
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}; |
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|
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|
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/* Default colour codes are as follows: global = blue |
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precomp global = cyan |
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caustic = red |
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volume = green |
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direct = magenta |
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contrib = yellow */ |
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const COLOR colDefs [] = { |
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{0.25, 0.25, 2}, {0.1, 1, 1}, {1, 0.1, 0.1}, |
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{0.1, 1, 0.1}, {1, 0.1, 1}, {1, 1, 0.1} |
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}; |
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|
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|
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static int setBool(char *str, unsigned pos, unsigned *var) |
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{ |
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switch ((str) [pos]) { |
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case '\0': |
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*var = !*var; |
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break; |
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case 'y': case 'Y': case 't': case 'T': case '+': case '1': |
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*var = 1; |
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break; |
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case 'n': case 'N': case 'f': case 'F': case '-': case '0': |
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*var = 0; |
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break; |
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default: |
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return 0; |
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} |
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|
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return 1; |
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} |
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|
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|
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int main (int argc, char** argv) |
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{ |
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char format [MAXFMTLEN]; |
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RREAL rad, radScale = RADSCALE, extent, dumpRatio; |
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unsigned arg, j, ptype, dim, fluxCol = 0, points = 0; |
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long numSpheres = NSPHERES; |
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COLOR col = {0, 0, 0}; |
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FILE *pmapFile; |
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PhotonMap pm; |
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PhotonPrimary pri; |
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Photon p; |
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#ifdef PMAP_OOC |
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char leafFname [1024]; |
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#endif |
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|
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if (argc < 2) { |
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puts("Dump photon maps as RADIANCE scene description " |
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"or ASCII point list\n"); |
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printf("Usage: %s " |
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"[-a] [-r radscale1] [-n num1] " |
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"[-f | -c rcol1 gcol1 bcol1] pmap1 " |
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"[-a] [-r radscale2] [-n num2] " |
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"[-f | -c rcol2 gcol2 bcol2] pmap2 " |
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"...\n", argv [0]); |
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return 1; |
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} |
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|
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for (arg = 1; arg < argc; arg++) { |
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/* Parse options */ |
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if (argv [arg][0] == '-') { |
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switch (argv [arg][1]) { |
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case 'a': |
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if (!setBool(argv [arg], 2, &points)) |
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error(USER, "invalid option syntax at -a"); |
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break; |
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case 'r': |
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if ((radScale = atof(argv [++arg])) <= 0) |
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error(USER, "invalid radius scale"); |
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break; |
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|
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case 'n': |
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if ((numSpheres = parseMultiplier(argv [++arg])) <= 0) |
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error(USER, "invalid number of points/spheres"); |
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break; |
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|
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case 'c': |
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if (fluxCol) |
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error(USER, "-f and -c are mutually exclusive"); |
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|
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if (badarg(argc - arg - 1, &argv [arg + 1], "fff")) |
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error(USER, "invalid RGB colour"); |
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|
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for (j = 0; j < 3; j++) |
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col [j] = atof(argv [++arg]); |
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break; |
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|
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case 'f': |
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if (intens(col) > 0) |
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error(USER, "-f and -c are mutually exclusive"); |
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|
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if (!setBool(argv [arg], 2, &fluxCol)) |
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error(USER, "invalid option syntax at -f"); |
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break; |
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|
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default: |
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sprintf(errmsg, "unknown option %s", argv [arg]); |
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error(USER, errmsg); |
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return -1; |
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} |
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|
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continue; |
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} |
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|
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/* Open next photon map file */ |
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if (!(pmapFile = fopen(argv [arg], "rb"))) { |
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sprintf(errmsg, "can't open %s", argv [arg]); |
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error(SYSTEM, errmsg); |
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} |
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|
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/* Get format string */ |
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strcpy(format, PMAP_FORMAT_GLOB); |
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if (checkheader(pmapFile, format, NULL) != 1) { |
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sprintf(errmsg, "photon map file %s has unknown format %s", |
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argv [arg], format); |
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error(USER, errmsg); |
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} |
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|
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/* Identify photon map type from format string */ |
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for (ptype = 0; |
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ptype < NUM_PMAP_TYPES && strcmp(pmapFormat [ptype], format); |
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ptype++); |
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|
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if (!validPmapType(ptype)) { |
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sprintf(errmsg, "file %s contains an unknown photon map type", |
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argv [arg]); |
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error(USER, errmsg); |
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} |
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|
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/* Get file format version and check for compatibility */ |
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if (strcmp(getstr(format, pmapFile), PMAP_FILEVER)) |
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error(USER, "incompatible photon map file format"); |
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|
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if (!points) { |
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/* Dump command line as comment */ |
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fputs("# ", stdout); |
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printargs(argc, argv, stdout); |
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fputc('\n', stdout); |
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} |
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|
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/* Set point/sphere colour if independent of photon flux, |
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output RADIANCE material def if required */ |
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if (!fluxCol) { |
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if (intens(col) <= 0) |
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copycolor(col, colDefs [ptype]); |
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if (!points) { |
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printf(radDefs [ptype].mat, col [0], col [1], col [2]); |
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fputc('\n', stdout); |
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} |
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} |
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|
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/* Get number of photons as fixed size, which possibly results in |
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* padding of MSB with 0 on some platforms. Unlike sizeof() however, |
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* this ensures portability since this value may span 32 or 64 bits |
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* depending on platform. */ |
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pm.numPhotons = getint(PMAP_LONGSIZE, pmapFile); |
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|
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/* Skip avg photon flux */ |
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for (j = 0; j < 3; j++) |
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getflt(pmapFile); |
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|
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/* Get distribution extent (min & max photon positions) */ |
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for (j = 0; j < 3; j++) { |
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pm.minPos [j] = getflt(pmapFile); |
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pm.maxPos [j] = getflt(pmapFile); |
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} |
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|
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/* Skip centre of gravity, and avg photon dist to it */ |
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for (j = 0; j < 4; j++) |
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getflt(pmapFile); |
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|
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/* Sphere radius based on avg intersphere dist depending on |
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whether the distribution occupies a 1D line (!), a 2D plane, |
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or 3D volume (= sphere distrib density ^-1/d, where d is the |
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dimensionality of the distribution) */ |
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for (j = 0, extent = 1.0, dim = 0; j < 3; j++) { |
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rad = pm.maxPos [j] - pm.minPos [j]; |
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|
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if (rad > FTINY) { |
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dim++; |
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extent *= rad; |
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} |
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} |
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|
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rad = radScale * RADCOEFF * pow(extent / numSpheres, 1./dim); |
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|
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/* Photon dump probability to satisfy target sphere count */ |
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dumpRatio = min(1, (float)numSpheres / pm.numPhotons); |
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|
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/* Skip primary rays */ |
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pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile); |
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while (pm.numPrimary-- > 0) { |
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/* Skip source index & incident dir */ |
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getint(sizeof(pri.srcIdx), pmapFile); |
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#ifdef PMAP_PRIMARYDIR |
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/* Skip primary incident dir */ |
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getint(sizeof(pri.dir), pmapFile); |
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#endif |
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#ifdef PMAP_PRIMARYPOS |
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/* Skip primary hitpoint */ |
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for (j = 0; j < 3; j++) |
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getflt(pmapFile); |
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#endif |
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} |
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|
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#ifdef PMAP_OOC |
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/* Open leaf file with filename derived from pmap, replace pmapFile |
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* (which is currently the node file) */ |
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strncpy(leafFname, argv [arg], sizeof(leafFname) - 1); |
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strncat(leafFname, PMAP_OOC_LEAFSUFFIX, sizeof(leafFname) - 1); |
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fclose(pmapFile); |
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if (!(pmapFile = fopen(leafFname, "rb"))) { |
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sprintf(errmsg, "cannot open leaf file %s", leafFname); |
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error(SYSTEM, errmsg); |
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} |
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#endif |
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|
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/* Read photons */ |
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while (pm.numPhotons-- > 0) { |
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#ifdef PMAP_OOC |
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/* Get entire photon record from ooC octree leaf file |
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!!! OOC PMAP FILES CURRENTLY DON'T USE PORTABLE I/O !!! */ |
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if (!fread(&p, sizeof(p), 1, pmapFile)) { |
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sprintf(errmsg, "error reading OOC leaf file %s", leafFname); |
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error(SYSTEM, errmsg); |
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} |
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#else /* kd-tree */ |
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/* Get photon position */ |
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for (j = 0; j < 3; j++) |
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p.pos [j] = getflt(pmapFile); |
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|
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/* Get photon normal (currently not used) */ |
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for (j = 0; j < 3; j++) |
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p.norm [j] = getint(1, pmapFile); |
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|
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/* Get photon flux */ |
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#ifdef PMAP_FLOAT_FLUX |
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for (j = 0; j < 3; j++) |
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p.flux [j] = getflt(pmapFile); |
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#else |
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for (j = 0; j < 4; j++) |
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p.flux [j] = getint(1, pmapFile); |
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#endif |
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|
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|
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|
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/* Skip primary ray index */ |
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getint(sizeof(p.primary), pmapFile); |
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|
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/* Skip flags */ |
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getint(sizeof(p.flags), pmapFile); |
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#endif |
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|
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/* Dump photon probabilistically acc. to target sphere count */ |
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if (frandom() <= dumpRatio) { |
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if (fluxCol) { |
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/* Get photon flux */ |
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getPhotonFlux(&p, col); |
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/* Scale by dumpRatio for energy conservation */ |
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scalecolor(col, 1.0 / dumpRatio); |
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} |
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|
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if (!points) { |
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if (fluxCol) { |
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/* Dump material def if variable (depends on flux) */ |
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printf(radDefs [ptype].mat, col [0], col [1], col [2]); |
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fputc('\n', stdout); |
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} |
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printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2], |
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rad); |
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fputc('\n', stdout); |
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} |
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else /* Dump as XYZ RGB point */ |
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printf(POINTFMT, p.pos [0], p.pos [1], p.pos [2], |
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col [0], col [1] ,col [2]); |
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} |
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|
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if (ferror(pmapFile) || feof(pmapFile)) { |
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sprintf(errmsg, "error reading %s", argv [arg]); |
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error(USER, errmsg); |
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} |
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} |
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|
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fclose(pmapFile); |
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|
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/* Reset defaults for next dump */ |
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radScale = RADSCALE; |
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numSpheres = NSPHERES; |
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col [0] = col [1] = col [2] = 0; |
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fluxCol = points = 0; |
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} |
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|
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return 0; |
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} |
