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#ifndef lint
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static const char RCSid[] = "$Id: renderopts.c,v 2.27 2025/04/22 17:12:25 greg Exp $";
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#endif
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/*
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* renderopts.c - process common rendering options
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*
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* External symbols declared in ray.h
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*/
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#include "copyright.h"
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#include "ray.h"
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#include "func.h"
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#include "paths.h"
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#include "pmapopt.h"
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extern char *progname; /* global argv[0] */
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char RFeatureList[2048] = /* newline-separated feature list */
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"VirtualSources\nSecondarySources\nSourceSubsampling\n"
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"SourceVisibility\nAmbientModifierSelection\n"
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"PathTracing\nRussianRoulette\nLowDiscrepancySeq\n"
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"SpecularSampling\nMaterialMixtures\nAntimatter\nBackFaceVisibility\n"
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"ScatteringModels=WGMD,Ashikhmin-Shirley\n"
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"TabulatedBSDFs=DataFile,KlemsXML,TensorTreeXML,+ViewPeakExtraction\n"
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"Instancing=Octree,TriangleMesh\nAliases\n"
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#if MAXCSAMP>3
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"Hyperspectral\n"
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#endif
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#if !defined(SHADCACHE) || SHADCACHE > 0
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"ShadowCache\n"
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#endif
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#ifdef DISPERSE
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"DielectricDispersion\n"
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#endif
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/* PMAP_FEATURES XXX @Roland: need to define this in pmapopt.h */
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;
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static char *
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get_feature( /* find a specific feature (with optional sublist) */
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const char *feat
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)
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{
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char *cp = RFeatureList;
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int n = 0;
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while ((feat[n] != '\0') & (feat[n] != '='))
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n++;
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if (!n)
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return(NULL);
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while (*cp) {
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if (!strncmp(cp, feat, n) && (cp[n] == '\n') | !feat[n] | (cp[n] == feat[n]))
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return(cp);
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while (*cp++ != '\n')
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;
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}
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return(NULL);
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}
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static int
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match_subfeatures( /* check if subfeatures are supported */
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char *mysublist,
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char *reqs
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)
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{
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if (mysublist)
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mysublist = strchr(mysublist, '=');
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if (!mysublist++ | !reqs)
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return(0); /* not a feature list */
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while (*reqs) { /* check each of their subfeature requests */
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char subfeat[64];
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char *cp = subfeat;
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int n;
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while (*reqs && (*cp = *reqs++) != ',')
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cp++;
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*cp = '\0';
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if (!(n = cp - subfeat))
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continue; /* empty subfeature */
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for (cp = mysublist; (cp = strstr(cp, subfeat)) != NULL; cp++)
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if ((cp[-1] == ',') | (cp[-1] == '=') &&
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(cp[n] == ',') | (cp[n] == '\n'))
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break; /* match */
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if (!cp)
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return(0); /* missing this one! */
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}
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return(1); /* matched them all */
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}
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int
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feature_status( /* report active feature list / check specifics */
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int ac,
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char *av[]
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)
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{
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if (ac <= 0) /* report entire list? */
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fputs(RFeatureList, stdout);
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for ( ; ac-- > 0; av++) { /* check each argument */
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char *cp;
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if (!*av[0]) continue;
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if ((cp = strchr(av[0], '=')) != NULL) {
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if (!match_subfeatures(get_feature(av[0]), cp+1))
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goto missing_feature;
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} else if ((cp = get_feature(av[0])) != NULL) {
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char *tp = strchr(cp, '=');
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if (tp && tp < strchr(cp, '\n'))
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do
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fputc(*cp, stdout);
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while (*cp++ != '\n');
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} else
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goto missing_feature;
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}
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return(0); /* return satisfactory status */
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missing_feature: /* or report error */
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fprintf(stderr, "%s: missing feature - %s\n", progname, av[0]);
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return(1);
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}
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int
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getrenderopt( /* get next render option */
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int ac,
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char *av[]
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)
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{
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#define check(ol,al) if (av[0][ol] || \
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badarg(ac-1,av+1,al)) \
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return(-1)
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#define check_bool(olen,var) switch (av[0][olen]) { \
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case '\0': var = !var; break; \
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case 'y': case 'Y': case 't': case 'T': \
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case '+': case '1': var = 1; break; \
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case 'n': case 'N': case 'f': case 'F': \
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case '-': case '0': var = 0; break; \
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default: return(-1); }
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static char **amblp; /* pointer to build ambient list */
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int rval;
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/* is it even an option? */
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if (ac < 1 || av[0] == NULL || av[0][0] != '-')
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return(-1);
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/* check if it's one we know */
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switch (av[0][1]) {
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case 'u': /* uncorrelated sampling */
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check_bool(2,rand_samp);
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return(0);
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case 'b': /* back face vis. */
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if (av[0][2] == 'v') {
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check_bool(3,backvis);
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return(0);
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}
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break;
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case 'd': /* direct */
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switch (av[0][2]) {
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case 't': /* threshold */
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check(3,"f");
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shadthresh = atof(av[1]);
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return(1);
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case 'c': /* certainty */
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check(3,"f");
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shadcert = atof(av[1]);
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return(1);
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case 'j': /* jitter */
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check(3,"f");
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dstrsrc = atof(av[1]);
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return(1);
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case 'r': /* relays */
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check(3,"i");
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directrelay = atoi(av[1]);
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return(1);
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case 'p': /* pretest */
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check(3,"i");
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vspretest = atoi(av[1]);
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return(1);
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case 'v': /* visibility */
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check_bool(3,directvis);
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return(0);
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case 's': /* size */
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check(3,"f");
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srcsizerat = atof(av[1]);
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return(1);
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}
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break;
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case 's': /* specular */
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switch (av[0][2]) {
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case 't': /* threshold */
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check(3,"f");
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specthresh = atof(av[1]);
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return(1);
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case 's': /* sampling */
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check(3,"f");
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specjitter = atof(av[1]);
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return(1);
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}
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break;
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case 'l': /* limit */
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switch (av[0][2]) {
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case 'r': /* recursion */
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check(3,"i");
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maxdepth = atoi(av[1]);
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return(1);
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case 'w': /* weight */
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check(3,"f");
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minweight = atof(av[1]);
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return(1);
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}
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break;
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case 'i': /* irradiance */
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check_bool(2,do_irrad);
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return(0);
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case 'a': /* ambient */
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switch (av[0][2]) {
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case 'v': /* value */
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check(3,"fff");
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setcolor(ambval, atof(av[1]),
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atof(av[2]),
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atof(av[3]));
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return(3);
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case 'w': /* weight */
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check(3,"i");
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ambvwt = atoi(av[1]);
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return(1);
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case 'a': /* accuracy */
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check(3,"f");
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ambacc = atof(av[1]);
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return(1);
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case 'r': /* resolution */
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check(3,"i");
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ambres = atoi(av[1]);
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return(1);
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case 'd': /* divisions */
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check(3,"i");
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ambdiv = atoi(av[1]);
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return(1);
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case 's': /* super-samp */
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check(3,"i");
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ambssamp = atoi(av[1]);
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return(1);
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case 'b': /* bounces */
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check(3,"i");
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ambounce = atoi(av[1]);
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return(1);
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case 'i': /* include */
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case 'I':
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check(3,"s");
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if (ambincl != 1) {
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ambincl = 1;
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amblp = amblist;
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}
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if (av[0][2] == 'I') { /* file */
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rval = wordfile(amblp, AMBLLEN-(amblp-amblist),
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getpath(av[1],getrlibpath(),R_OK));
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if (rval < 0) {
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sprintf(errmsg,
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"cannot open ambient include file \"%s\"", av[1]);
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error(SYSTEM, errmsg);
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}
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amblp += rval;
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} else {
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*amblp++ = savqstr(av[1]);
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*amblp = NULL;
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}
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return(1);
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case 'e': /* exclude */
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case 'E':
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check(3,"s");
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if (ambincl != 0) {
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ambincl = 0;
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amblp = amblist;
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}
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if (av[0][2] == 'E') { /* file */
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rval = wordfile(amblp, AMBLLEN-(amblp-amblist),
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getpath(av[1],getrlibpath(),R_OK));
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if (rval < 0) {
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sprintf(errmsg,
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"cannot open ambient exclude file \"%s\"", av[1]);
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error(SYSTEM, errmsg);
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}
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amblp += rval;
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} else {
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*amblp++ = savqstr(av[1]);
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*amblp = NULL;
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}
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return(1);
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case 'f': /* file */
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check(3,"s");
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ambfile = savqstr(av[1]);
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return(1);
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}
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break;
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case 'm': /* medium */
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switch (av[0][2]) {
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case 'e': /* extinction */
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check(3,"fff");
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setcolor(cextinction, atof(av[1]),
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atof(av[2]),
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atof(av[3]));
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return(3);
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case 'a': /* albedo */
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check(3,"fff");
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setcolor(salbedo, atof(av[1]),
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atof(av[2]),
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atof(av[3]));
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return(3);
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case 'g': /* eccentr. */
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check(3,"f");
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seccg = atof(av[1]);
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return(1);
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case 's': /* sampling */
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check(3,"f");
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ssampdist = atof(av[1]);
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return(1);
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}
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break;
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case 'f': /* .cal file */
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check(2,"s");
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loadfunc(av[1]);
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return(1);
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case 'e': /* .cal expression */
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check(2,"s");
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if (!strchr(av[1], '=') && !strchr(av[1], ':'))
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break;
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scompile(av[1], NULL, 0);
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return(1);
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#if MAXCSAMP>3
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case 'c': /* spectral sampling */
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switch (av[0][2]) {
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case 's': /* spectral bin count */
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check(3,"i");
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NCSAMP = atoi(av[1]);
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return(1);
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case 'w': /* wavelength extrema */
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check(3,"ff");
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WLPART[0] = atof(av[1]);
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WLPART[3] = atof(av[2]);
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| 338 |
return(2);
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| 339 |
}
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break;
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| 341 |
#endif
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| 342 |
}
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| 343 |
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| 344 |
/* PMAP: Parse photon mapping options */
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| 345 |
return(getPmapRenderOpt(ac, av));
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/* return(-1); */ /* unknown option */
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| 348 |
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#undef check
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| 350 |
#undef check_bool
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| 351 |
}
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| 354 |
void
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| 355 |
print_rdefaults(void) /* print default render values to stdout */
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| 356 |
{
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| 357 |
printf(do_irrad ? "-i+\t\t\t\t# irradiance calculation on\n" :
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| 358 |
"-i-\t\t\t\t# irradiance calculation off\n");
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| 359 |
printf(rand_samp ? "-u+\t\t\t\t# uncorrelated Monte Carlo sampling\n" :
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| 360 |
"-u-\t\t\t\t# correlated quasi-Monte Carlo sampling\n");
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| 361 |
printf(backvis ? "-bv+\t\t\t\t# back face visibility on\n" :
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| 362 |
"-bv-\t\t\t\t# back face visibility off\n");
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| 363 |
printf("-dt %f\t\t\t# direct threshold\n", shadthresh);
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| 364 |
printf("-dc %f\t\t\t# direct certainty\n", shadcert);
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| 365 |
printf("-dj %f\t\t\t# direct jitter\n", dstrsrc);
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| 366 |
printf("-ds %f\t\t\t# direct sampling\n", srcsizerat);
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| 367 |
printf("-dr %-9d\t\t\t# direct relays\n", directrelay);
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| 368 |
printf("-dp %-9d\t\t\t# direct pretest density\n", vspretest);
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| 369 |
printf(directvis ? "-dv+\t\t\t\t# direct visibility on\n" :
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| 370 |
"-dv-\t\t\t\t# direct visibility off\n");
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| 371 |
printf("-ss %f\t\t\t# specular sampling\n", specjitter);
|
| 372 |
printf("-st %f\t\t\t# specular threshold\n", specthresh);
|
| 373 |
printf("-av %f %f %f\t# ambient value\n", colval(ambval,RED),
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| 374 |
colval(ambval,GRN), colval(ambval, BLU));
|
| 375 |
printf("-aw %-9d\t\t\t# ambient value weight\n", ambvwt);
|
| 376 |
printf("-ab %-9d\t\t\t# ambient bounces\n", ambounce);
|
| 377 |
printf("-aa %f\t\t\t# ambient accuracy\n", ambacc);
|
| 378 |
printf("-ar %-9d\t\t\t# ambient resolution\n", ambres);
|
| 379 |
printf("-ad %-9d\t\t\t# ambient divisions\n", ambdiv);
|
| 380 |
printf("-as %-9d\t\t\t# ambient super-samples\n", ambssamp);
|
| 381 |
printf("-me %.2e %.2e %.2e\t# mist extinction coefficient\n",
|
| 382 |
colval(cextinction,RED),
|
| 383 |
colval(cextinction,GRN),
|
| 384 |
colval(cextinction,BLU));
|
| 385 |
printf("-ma %f %f %f\t# mist scattering albedo\n", colval(salbedo,RED),
|
| 386 |
colval(salbedo,GRN), colval(salbedo,BLU));
|
| 387 |
printf("-mg %f\t\t\t# mist scattering eccentricity\n", seccg);
|
| 388 |
printf("-ms %f\t\t\t# mist sampling distance\n", ssampdist);
|
| 389 |
if (NCSAMP > 3) {
|
| 390 |
printf("-cs %-2d\t\t\t\t# number of spectral bins\n", NCSAMP);
|
| 391 |
printf("-cw %3.0f %3.0f\t\t\t# wavelength limits (nm)\n",
|
| 392 |
WLPART[3], WLPART[0]);
|
| 393 |
}
|
| 394 |
printf("-lr %-9d\t\t\t# limit reflection%s\n", maxdepth,
|
| 395 |
maxdepth<=0 ? " (Russian roulette)" : "");
|
| 396 |
printf("-lw %.2e\t\t\t# limit weight\n", minweight);
|
| 397 |
|
| 398 |
/* PMAP: output photon map defaults */
|
| 399 |
printPmapDefaults();
|
| 400 |
}
|
