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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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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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/* |
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* Make illum sources for optimizing rendering process |
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*/ |
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|
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#include "standard.h" |
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|
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#include "object.h" |
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|
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#include "otypes.h" |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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int doneheader = 0; /* printed header yet? */ |
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|
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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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|
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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} |
