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/* |
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================================================================== |
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Photon map 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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(c) Lucerne University of Applied Sciences and Arts, |
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supported by the Swiss National Science Foundation (SNSF, #147053) |
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================================================================== |
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|
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$Id: pmapio.c,v 2.4 2015/05/20 14:44:12 greg 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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const Photon* p; |
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FILE* file; |
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|
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if (!pmap || !pmap -> heap || !pmap -> heapSize || |
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!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 (photonRepTime) { |
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sprintf(errmsg, "Saving %s (%ld photons)...\n", |
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fname, pmap -> heapSize); |
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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(file, "%ld photons @ (%.2e, %.2e, %.2e) avg watts\n" |
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"Extent [%.3f, %.3f, %.3f] [%.3f, %.3f, %.3f]\n", |
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pmap -> heapSize, pmap -> photonFlux [0], |
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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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if (pmap -> primary) |
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fprintf(file, "%d primary rays\n", pmap -> primaryEnd + 1); |
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|
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/* Write format */ |
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fputformat((char*)pmapFormat [pmap -> type], file); |
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fprintf(file, "VERSION=%d\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 file format version */ |
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putint(PMAP_FILEVER, sizeof(PMAP_FILEVER), file); |
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|
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/* Write number of photons */ |
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putint(pmap -> heapSize, sizeof(pmap -> heapSize), 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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for (i = 0, p = pmap -> heap; i < pmap -> heapSize; i++, p++) { |
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/* Write photon attributes */ |
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for (j = 0; j < 3; j++) |
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putflt(p -> pos [j], file); |
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|
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/* Bytewise dump otherwise we have portability probs */ |
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for (j = 0; j < 3; j++) |
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putint(p -> norm [j], 1, file); |
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|
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#ifdef PMAP_FLOAT_FLUX |
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for (j = 0; j < 3; j++) |
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putflt(p -> flux [j], file); |
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#else |
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for (j = 0; j < 4; j++) |
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putint(p -> flux [j], 1, file); |
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#endif |
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|
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putint(p -> primary, sizeof(p -> primary), file); |
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putint(p -> flags, 1, file); |
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|
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if (ferror(file)) { |
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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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|
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/* Write out primary photon rays (or just zero count if none) */ |
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if (pmap -> primary) { |
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/* primaryEnd points to last primary ray in array, so increment for |
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* number of entries */ |
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putint(pmap -> primaryEnd + 1, sizeof(pmap -> primaryEnd), file); |
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|
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for (i = 0; i <= pmap -> primaryEnd; i++) { |
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PhotonPrimary *prim = pmap -> primary + i; |
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|
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putint(prim -> srcIdx, sizeof(prim -> srcIdx), file); |
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|
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putint(prim -> dir, sizeof(prim -> dir), file); |
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|
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for (j = 0; j < 3; j++) |
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putflt(prim -> pos [j], file); |
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|
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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 -> primaryEnd), file); |
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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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Photon* p; |
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PhotonMapType ptype = PMAP_TYPE_NONE; |
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char format [128]; |
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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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strcmp(pmapFormat [ptype], format) && ptype < NUM_PMAP_TYPES; |
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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 (getint(sizeof(PMAP_FILEVER), 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 */ |
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pmap -> heapSize = pmap -> heapEnd = |
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getint(sizeof(pmap -> heapSize), file); |
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pmap -> heap = (Photon *)malloc(pmap -> heapSize * sizeof(Photon)); |
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if (!pmap -> heap) |
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error(INTERNAL, "can't allocate photon heap from 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 photon attributes */ |
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for (i = 0, p = pmap -> heap; i < pmap -> heapSize; i++, p++) { |
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for (j = 0; j < 3; j++) |
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p -> pos [j] = getflt(file); |
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|
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/* Bytewise grab otherwise we have portability probs */ |
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for (j = 0; j < 3; j++) |
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p -> norm [j] = getint(1, file); |
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|
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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(file); |
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#else |
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for (j = 0; j < 4; j++) |
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p -> flux [j] = getint(1, file); |
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#endif |
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|
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p -> primary = getint(sizeof(p -> primary), file); |
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p -> flags = getint(1, file); |
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|
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if (feof(file)) { |
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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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|
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/* Get primary photon rays */ |
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pmap -> primarySize = getint(sizeof(pmap -> primarySize), file); |
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|
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if (pmap -> primarySize) { |
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pmap -> primaryEnd = pmap -> primarySize - 1; |
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pmap -> primary = (PhotonPrimary*)malloc(pmap -> primarySize * |
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sizeof(PhotonPrimary)); |
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if (!pmap -> primary) |
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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 -> primarySize; i++) { |
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PhotonPrimary *prim = pmap -> primary + i; |
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|
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prim -> srcIdx = getint(sizeof(prim -> srcIdx), file); |
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|
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prim -> dir = getint(sizeof(prim -> dir), file); |
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|
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for (j = 0; j < 3; j++) |
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prim -> pos [j] = getflt(file); |
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|
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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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fclose(file); |
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|
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return ptype; |
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} |
