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#ifndef lint
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static const char RCSid[] = "$Id: pmapio.c,v 2.6 2015/08/18 18:45:55 greg Exp $";
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#endif
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/*
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==================================================================
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Photon map file I/O
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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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#include "pmapio.h"
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#include "pmapdiag.h"
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#include "resolu.h"
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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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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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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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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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/* Write header */
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newheader("RADIANCE", file);
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/* Write command line */
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printargs(argc, argv, file);
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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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/* 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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/* Empty line = end of header */
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putc('\n', file);
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/* Write file format version */
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putint(PMAP_FILEVER, sizeof(PMAP_FILEVER), file);
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/* Write number of photons */
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putint(pmap -> heapSize, sizeof(pmap -> heapSize), file);
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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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/* 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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/* 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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/* Write avg distance to centre of gravity */
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putflt(pmap -> CoGdist, file);
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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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/* 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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#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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putint(p -> primary, sizeof(p -> primary), file);
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putint(p -> flags, 1, file);
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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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/* 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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for (i = 0; i <= pmap -> primaryEnd; i++) {
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PhotonPrimary *prim = pmap -> primary + i;
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putint(prim -> srcIdx, sizeof(prim -> srcIdx), file);
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putint(prim -> dir, sizeof(prim -> dir), file);
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for (j = 0; j < 3; j++)
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putflt(prim -> pos [j], file);
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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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fclose(file);
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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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if (!pmap)
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return PMAP_TYPE_NONE;
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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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/* 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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/* 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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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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initPhotonMap(pmap, ptype);
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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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/* 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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/* 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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/* 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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/* 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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/* Get avg distance to centre of gravity */
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pmap -> CoGdist = getflt(file);
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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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/* 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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#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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p -> primary = getint(sizeof(p -> primary), file);
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p -> flags = getint(1, file);
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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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/* Get primary photon rays */
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pmap -> primarySize = getint(sizeof(pmap -> primarySize), file);
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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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for (i = 0; i < pmap -> primarySize; i++) {
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PhotonPrimary *prim = pmap -> primary + i;
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prim -> srcIdx = getint(sizeof(prim -> srcIdx), file);
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prim -> dir = getint(sizeof(prim -> dir), file);
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for (j = 0; j < 3; j++)
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prim -> pos [j] = getflt(file);
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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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fclose(file);
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return ptype;
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}
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