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/* Copyright (c) 1991 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* Make illum sources for optimizing rendering process
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*/
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#include "standard.h"
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#include "object.h"
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#include "otypes.h"
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/* default parameters */
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#define SAMPDENS 128 /* points per projected steradian */
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#define NSAMPS 32 /* samples per point */
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#define DFLMAT "illum_mat" /* material name */
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/* selection options */
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#define S_NONE 0 /* select none */
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#define S_ELEM 1 /* select specified element */
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#define S_COMPL 2 /* select all but element */
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#define S_ALL 3 /* select all */
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/* rtrace command and defaults */
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char *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-ab", "2",
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"-ad", "256", "-as", "128", "-aa", ".15" };
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int rtargc = 13;
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/* overriding rtrace options */
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char *myrtopts[] = { "-I-", "-i-", "-di+", "-ov", "-h-", "-fff", NULL };
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/* illum flags */
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#define IL_FLAT 0x1 /* flat surface */
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#define IL_LIGHT 0x2 /* light rather than illum */
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#define IL_COLDST 0x4 /* colored distribution */
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#define IL_COLAVG 0x8 /* compute average color */
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#define IL_DATCLB 0x10 /* OK to clobber data file */
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struct illum_args {
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int flags; /* flags from list above */
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char matname[MAXSTR]; /* illum material name */
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char datafile[MAXSTR]; /* distribution data file name */
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int dfnum; /* data file number */
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char altmatname[MAXSTR]; /* alternate material name */
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int nsamps; /* # of samples in each direction */
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int nalt, nazi; /* # of altitude and azimuth angles */
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FVECT orient; /* coordinate system orientation */
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} thisillum = { /* default values */
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0,
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DFLMAT,
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DFLMAT,
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0,
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VOIDID,
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NSAMPS,
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};
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int sampdens = SAMPDENS; /* sample point density */
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char matcheck[MAXSTR]; /* current material to include or exclude */
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int matselect = S_ALL; /* selection criterion */
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int rt_pd[3]; /* rtrace pipe descriptors */
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float *rt_buf; /* rtrace i/o buffer */
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int rt_bsiz; /* maximum rays for rtrace buffer */
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int rt_nrays; /* current length of rtrace buffer */
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int gargc; /* global argc */
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char **gargv; /* global argv */
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#define progname gargv[0]
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int doneheader = 0; /* printed header yet? */
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extern char *fgetline(), *fgetword(), *sskip(),
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*atos(), *iskip(), *fskip();
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extern FILE *popen();
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main(argc, argv) /* compute illum distributions using rtrace */
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int argc;
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char *argv[];
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{
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extern char *getenv(), *getpath();
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char *rtpath;
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register int i;
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/* set global arguments */
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gargc = argc; gargv = argv;
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/* set up rtrace command */
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if (argc < 2)
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error(USER, "too few arguments");
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for (i = 1; i < argc-1; i++)
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rtargv[rtargc++] = argv[i];
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for (i = 0; myrtopts[i] != NULL; i++)
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rtargv[rtargc++] = myrtopts[i];
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rtargv[rtargc++] = argv[argc-1];
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rtargv[rtargc] = NULL;
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/* just asking for defaults? */
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if (!strcmp(argv[argc-1], "-defaults")) {
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rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
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if (rtpath == NULL) {
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eputs(rtargv[0]);
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eputs(": command not found\n");
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exit(1);
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}
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execv(rtpath, rtargv);
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perror(rtpath);
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exit(1);
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}
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/* else initialize and run our calculation */
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init();
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mkillum(stdin, "standard input");
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exit(cleanup()); /* cleanup returns rtrace status */
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}
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init() /* start rtrace and set up buffers */
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{
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int maxbytes;
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maxbytes = open_process(rt_pd, rtargv);
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if (maxbytes == 0) {
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eputs(rtargv[0]);
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eputs(": command not found\n");
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exit(1);
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}
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if (maxbytes < 0)
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error(SYSTEM, "cannot start rtrace process");
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rt_bsiz = maxbytes/(6*sizeof(float));
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rt_buf = (float *)malloc(rt_bsiz*(6*sizeof(float)));
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if (rt_buf == NULL)
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error(SYSTEM, "out of memory in init");
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rt_bsiz--; /* allow for flush ray */
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rt_nrays = 0;
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}
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int
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cleanup() /* close rtrace process and return status */
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{
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int status;
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free((char *)rt_buf);
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rt_bsiz = 0;
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status = close_process(rt_pd);
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if (status < 0)
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return(0); /* unknown status */
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return(status);
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}
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eputs(s) /* put string to stderr */
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register char *s;
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{
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static int midline = 0;
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if (!*s) return;
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if (!midline) {
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fputs(progname, stderr);
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fputs(": ", stderr);
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}
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fputs(s, stderr);
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midline = s[strlen(s)-1] != '\n';
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}
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mkillum(infp, name) /* process stream */
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register FILE *infp;
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char *name;
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{
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char buf[512];
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FILE *pfp;
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register int c;
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while ((c = getc(infp)) != EOF) {
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if (isspace(c))
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continue;
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if (c == '#') { /* comment/options */
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buf[0] = c;
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fgets(buf+1, sizeof(buf)-1, infp);
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fputs(buf, stdout);
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getoptions(buf, name);
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} else if (c == '!') { /* command */
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buf[0] = c;
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fgetline(buf+1, sizeof(buf)-1, infp);
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if ((pfp = popen(buf+1, "r")) == NULL) {
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sprintf(errmsg, "cannot execute \"%s\"", buf);
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error(SYSTEM, errmsg);
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}
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mkillum(pfp, buf);
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pclose(pfp);
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} else { /* object */
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ungetc(c, infp);
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xobject(infp, name);
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}
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}
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}
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getoptions(s, nm) /* get options from string s */
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char *s;
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char *nm;
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{
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extern FILE *freopen();
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char buf[64];
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int nerrs = 0;
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register char *cp;
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if (strncmp(s, "#@mkillum", 9) || !isspace(s[9]))
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return;
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cp = s+10;
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while (*cp) {
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switch (*cp) {
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case ' ':
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case '\t':
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case '\n':
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cp++;
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continue;
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case 'm': /* material name */
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cp++;
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if (*cp != '=')
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break;
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cp++;
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atos(thisillum.matname, MAXSTR, cp);
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cp = sskip(cp);
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if (!(thisillum.flags & IL_DATCLB)) {
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strcpy(thisillum.datafile, thisillum.matname);
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thisillum.dfnum = 0;
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}
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continue;
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case 'f': /* data file name */
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cp++;
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if (*cp != '=')
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break;
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cp++;
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if (*cp == '\0') {
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thisillum.flags &= ~IL_DATCLB;
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continue;
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}
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atos(thisillum.datafile, MAXSTR, cp);
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cp = sskip(cp);
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thisillum.dfnum = 0;
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thisillum.flags |= IL_DATCLB;
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continue;
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case 'i': /* include material */
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case 'e': /* exclude material */
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matselect = (*cp++ == 'i') ? S_ELEM : S_COMPL;
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if (*cp != '=')
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break;
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cp++;
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atos(matcheck, MAXSTR, cp);
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cp = sskip(cp);
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continue;
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case 'a': /* use everything */
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cp = sskip(cp);
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matselect = S_ALL;
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continue;
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case 'n': /* use nothing (passive) */
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cp = sskip(cp);
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matselect = S_NONE;
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continue;
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case 'c': /* color calculation */
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cp++;
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if (*cp != '=')
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break;
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cp++;
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switch (*cp) {
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case 'a': /* average */
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thisillum.flags |= IL_COLAVG;
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thisillum.flags &= ~IL_COLDST;
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break;
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case 'd': /* distribution */
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thisillum.flags |= IL_COLDST;
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thisillum.flags &= ~IL_COLAVG;
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break;
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case 'n': /* none */
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thisillum.flags &= ~(IL_COLAVG|IL_COLDST);
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break;
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default:
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goto opterr;
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}
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cp = sskip(cp);
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continue;
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case 'd': /* point sample density */
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cp++;
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if (*cp != '=')
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break;
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cp++;
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if (!isintd(cp, " \t\n"))
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break;
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sampdens = atoi(cp);
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cp = sskip(cp);
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continue;
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case 's': /* point super-samples */
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cp++;
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if (*cp != '=')
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break;
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cp++;
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if (!isintd(cp, " \t\n"))
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break;
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thisillum.nsamps = atoi(cp);
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cp = sskip(cp);
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continue;
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case 'o': /* output file */
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cp++;
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if (*cp != '=')
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break;
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cp++;
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atos(buf, sizeof(buf), cp);
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cp = sskip(cp);
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if (freopen(buf, "w", stdout) == NULL) {
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sprintf(errmsg,
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"cannot open output file \"%s\"", buf);
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error(SYSTEM, errmsg);
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}
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doneheader = 0;
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continue;
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}
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opterr: /* skip faulty option */
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cp = sskip(cp);
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nerrs++;
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}
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if (nerrs) {
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sprintf(errmsg, "(%s): %d error(s) in option line:",
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nm, nerrs);
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error(WARNING, errmsg);
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eputs(s);
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}
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}
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