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#ifndef lint
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static const char RCSid[] = "$Id: pmapopt.c,v 2.9 2020/01/23 18:24:47 rschregle Exp $";
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#endif
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/*
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==================================================================
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Photon map interface to RADIANCE render options
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Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
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(c) Fraunhofer Institute for Solar Energy Systems,
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(c) Lucerne University of Applied Sciences and Arts,
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supported by the Swiss National Science Foundation (SNSF, #147053)
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==================================================================
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$Id: pmapopt.c,v 2.9 2020/01/23 18:24:47 rschregle Exp $
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*/
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#include "ray.h"
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#include "pmapparm.h"
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int getPmapRenderOpt (int ac, char *av [])
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/* Parse next render option for photon map; interface to getrenderopt();
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* return -1 if parsing failed, else number of parameters consumed */
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{
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#define check(ol,al) (av[0][ol] || badarg(ac-1,av+1,al))
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static int t = -1; /* pmap parameter index */
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if (ac < 1 || !av [0] || av [0][0] != '-')
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return -1;
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switch (av [0][1]) {
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case 'a':
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switch (av [0][2]) {
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case 'p': /* photon map */
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/* Asking for photon map, ergo ambounce != 0 */
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ambounce += (ambounce == 0);
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if (!check(3, "s")) {
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/* File -> assume bwidth = 1 or precomputed pmap */
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if (++t >= NUM_PMAP_TYPES)
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error(USER, "too many photon maps");
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pmapParams [t].fileName = savqstr(av [1]);
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pmapParams [t].minGather = pmapParams [t].maxGather =
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defaultGather;
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}
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else return -1;
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if (!check(3, "si")) {
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/* File + bandwidth */
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pmapParams [t].minGather = pmapParams [t].maxGather =
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atoi(av [2]);
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if (!pmapParams [t].minGather)
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return -1;
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}
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else {
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sprintf(errmsg, "missing photon lookup bandwidth, "
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"defaulting to %d", defaultGather);
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error(WARNING, errmsg);
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return 1;
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}
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if (!check(3, "sii")) {
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/* File + min bwidth + max bwidth -> bias compensation */
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pmapParams [t].maxGather = atoi(av [3]);
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if (pmapParams [t].minGather >= pmapParams [t].maxGather)
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return -1;
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return 3;
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}
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else return 2;
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case 'm': /* Fixed max photon search radius */
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if (check(3, "f") || (maxDistFix = atof(av [1])) <= 0)
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error(USER, "invalid max photon search radius");
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return 1;
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#ifdef PMAP_OOC
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case 'c': /* OOC pmap cache page size ratio */
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if (check(3, "f") || (pmapCachePageSize = atof(av [1])) <= 0)
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error(USER, "invalid photon cache page size ratio");
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return 1;
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case 'C': /* OOC pmap cache size (in photons); 0 = no caching */
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if (check(3, "s"))
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error(USER, "invalid number of cached photons");
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/* Parsing failure sets to zero and disables caching */
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pmapCacheSize = parseMultiplier(av [1]);
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return 1;
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#endif
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}
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}
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#undef check
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/* Unknown option */
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return -1;
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}
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void printPmapDefaults ()
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/* Print defaults for photon map render options */
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{
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printf("-am %.1f\t\t\t\t# max photon search radius\n", maxDistFix);
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#ifdef PMAP_OOC
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printf("-ac %.1f\t\t\t\t# photon cache page size ratio\n",
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pmapCachePageSize);
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printf("-aC %ld\t\t\t# num cached photons\n", pmapCacheSize);
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#endif
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}
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