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#ifndef lint |
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static const char RCSid[] = "$Id: pmapio.c,v 2.13 2021/02/18 17:08:50 rschregle Exp $"; |
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#endif |
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|
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/* |
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======================================================================= |
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Photon map portable file I/O |
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|
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Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
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(c) Fraunhofer Institute for Solar Energy Systems, |
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supported by the German Research Foundation |
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(DFG LU-204/10-2, "Fassadenintegrierte Regelsysteme FARESYS") |
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(c) Lucerne University of Applied Sciences and Arts, |
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supported by the Swiss National Science Foundation |
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(SNSF #147053, "Daylight Redirecting Components", |
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SNSF #179067, "Light Fields for Spatio-Temporal Glare Assessment") |
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======================================================================= |
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|
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$Id: pmapio.c,v 2.13 2021/02/18 17:08:50 rschregle Exp $ |
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*/ |
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|
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|
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|
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#include "pmapio.h" |
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#include "pmapdiag.h" |
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#include "resolu.h" |
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|
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|
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|
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void savePhotonMap (const PhotonMap *pmap, const char *fname, |
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int argc, char **argv) |
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{ |
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unsigned long i, j; |
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FILE *file; |
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|
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if (!pmap || !pmap -> numPhotons || !validPmapType(pmap -> type)) { |
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error(INTERNAL, "attempt to save empty or invalid photon map"); |
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return; |
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} |
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|
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if (verbose) { |
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if (pmap -> numPrimary) |
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sprintf(errmsg, "Saving %s (%ld photons, %d primaries)\n", |
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fname, pmap -> numPhotons, pmap -> numPrimary); |
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else sprintf(errmsg, "Saving %s (%ld photons)\n", fname, |
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pmap -> numPhotons); |
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|
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eputs(errmsg); |
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fflush(stderr); |
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} |
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|
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if (!(file = fopen(fname, "wb"))) { |
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sprintf(errmsg, "can't open photon map file %s", fname); |
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error(SYSTEM, errmsg); |
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} |
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|
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/* Write header */ |
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newheader("RADIANCE", file); |
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|
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/* Write command line */ |
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printargs(argc, argv, file); |
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|
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/* Include statistics in info text */ |
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fprintf( |
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file, |
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"NumPhotons\t= %ld\n" |
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"AvgFlux\t\t= [%.2e, %.2e, %.2e]\n" |
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"Bbox\t\t= [%.3f, %.3f, %.3f] [%.3f, %.3f, %.3f]\n" |
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"CoG\t\t= [%.3f, %.3f, %.3f]\n" |
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"MaxDist^2\t= %.3f\n", |
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pmap -> numPhotons, |
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pmap -> photonFlux [0], pmap -> photonFlux [1], pmap -> photonFlux [2], |
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pmap -> minPos [0], pmap -> minPos [1], pmap -> minPos [2], |
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pmap -> maxPos [0], pmap -> maxPos [1], pmap -> maxPos [2], |
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pmap -> CoG [0], pmap -> CoG [1], pmap -> CoG [2], |
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pmap -> CoGdist |
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); |
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|
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if (pmap -> primaries) |
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fprintf(file, "%d primary rays\n", pmap -> numPrimary); |
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|
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/* Write format, including human-readable file version */ |
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fputformat(pmapFormat [pmap -> type], file); |
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fprintf(file, "VERSION=%s\n", PMAP_FILEVER); |
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|
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/* Empty line = end of header */ |
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putc('\n', file); |
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|
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/* Write machine-readable file format version */ |
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putstr(PMAP_FILEVER, file); |
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|
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/* Write 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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putint(pmap -> numPhotons, PMAP_LONGSIZE, file); |
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|
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/* Write average photon flux */ |
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for (j = 0; j < 3; j++) |
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putflt(pmap -> photonFlux [j], file); |
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|
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/* Write max and min photon positions */ |
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for (j = 0; j < 3; j++) { |
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putflt(pmap -> minPos [j], file); |
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putflt(pmap -> maxPos [j], file); |
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} |
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|
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/* Write centre of gravity */ |
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for (j = 0; j < 3; j++) |
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putflt(pmap -> CoG [j], file); |
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|
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/* Write avg distance to centre of gravity */ |
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putflt(pmap -> CoGdist, file); |
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|
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/* Write out primary photon rays (or just zero count if none) */ |
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if (pmap -> primaries) { |
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putint(pmap -> numPrimary, sizeof(pmap -> numPrimary), file); |
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|
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for (i = 0; i < pmap -> numPrimary; i++) { |
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PhotonPrimary *prim = pmap -> primaries + i; |
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|
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putint(prim -> srcIdx, sizeof(prim -> srcIdx), file); |
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#ifdef PMAP_PRIMARYDIR |
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putint(prim -> dir, sizeof(prim -> dir), file); |
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#endif |
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#ifdef PMAP_PRIMARYPOS |
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for (j = 0; j < 3; j++) |
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putflt(prim -> pos [j], file); |
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#endif |
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if (ferror(file)) |
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error(SYSTEM, "error writing primary photon rays"); |
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} |
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} |
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else putint(0, sizeof(pmap -> numPrimary), file); |
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|
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/* Save photon storage */ |
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#ifdef PMAP_OOC |
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if (OOC_SavePhotons(pmap, file)) { |
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#else |
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if (kdT_SavePhotons(pmap, file)) { |
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#endif |
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sprintf(errmsg, "error writing photon map file %s", fname); |
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error(SYSTEM, errmsg); |
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} |
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|
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fclose(file); |
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} |
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|
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|
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|
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PhotonMapType loadPhotonMap (PhotonMap *pmap, const char *fname) |
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{ |
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PhotonMapType ptype = PMAP_TYPE_NONE; |
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char format [MAXFMTLEN]; |
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unsigned long i, j; |
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FILE *file; |
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|
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if (!pmap) |
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return PMAP_TYPE_NONE; |
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|
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if ((file = fopen(fname, "rb")) == NULL) { |
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sprintf(errmsg, "can't open photon map file %s", fname); |
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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(file, format, NULL) != 1) { |
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sprintf(errmsg, "photon map file %s has unknown format %s", |
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fname, 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", fname); |
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error(USER, errmsg); |
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} |
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|
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initPhotonMap(pmap, ptype); |
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|
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/* Get file format version and check for compatibility */ |
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if (strcmp(getstr(format, file), PMAP_FILEVER)) |
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error(USER, "incompatible photon map file format"); |
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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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pmap -> numPhotons = getint(PMAP_LONGSIZE, file); |
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|
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/* Get average photon flux */ |
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for (j = 0; j < 3; j++) |
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pmap -> photonFlux [j] = getflt(file); |
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|
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/* Get max and min photon positions */ |
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for (j = 0; j < 3; j++) { |
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pmap -> minPos [j] = getflt(file); |
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pmap -> maxPos [j] = getflt(file); |
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} |
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|
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/* Get centre of gravity */ |
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for (j = 0; j < 3; j++) |
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pmap -> CoG [j] = getflt(file); |
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|
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/* Get avg distance to centre of gravity */ |
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pmap -> CoGdist = getflt(file); |
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|
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/* Get primary photon rays */ |
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pmap -> numPrimary = getint(sizeof(pmap -> numPrimary), file); |
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|
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if (pmap -> numPrimary) { |
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pmap -> primaries = calloc(pmap -> numPrimary, sizeof(PhotonPrimary)); |
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if (!pmap -> primaries) |
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error(INTERNAL, "can't allocate primary photon rays"); |
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|
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for (i = 0; i < pmap -> numPrimary; i++) { |
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PhotonPrimary *prim = pmap -> primaries + i; |
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|
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prim -> srcIdx = getint(sizeof(prim -> srcIdx), file); |
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#ifdef PMAP_PRIMARYDIR |
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prim -> dir = getint(sizeof(prim -> dir), file); |
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#endif |
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#ifdef PMAP_PRIMARYPOS |
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for (j = 0; j < 3; j++) |
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prim -> pos [j] = getflt(file); |
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#endif |
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if (feof(file)) |
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error(SYSTEM, "error reading primary photon rays"); |
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} |
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} |
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|
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/* Load photon storage */ |
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#ifdef PMAP_OOC |
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if (OOC_LoadPhotons(pmap, file)) { |
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#else |
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if (kdT_LoadPhotons(pmap, file)) { |
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#endif |
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sprintf(errmsg, "error reading photon map file %s", fname); |
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error(SYSTEM, errmsg); |
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} |
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|
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fclose(file); |
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return ptype; |
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} |
