src/hd/rholo.c

/* Copyright (c) 1997 Silicon Graphics, Inc. */

#ifndef lint
static char SCCSid[] = "$SunId$ SGI";
#endif

/*
 * Radiance holodeck generation controller
 */

#include "rholo.h"
#include "random.h"
#include "paths.h"
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>

                        /* the following must be consistent with rholo.h */
int     NVARS = NRHVARS;                /* total number of variables */

VARIABLE        vv[] = RHVINIT;         /* variable-value pairs */

char    *progname;              /* our program name */
char    *hdkfile;               /* holodeck file name */
char    froot[MAXPATH];         /* root file name */

int     nowarn = 0;             /* turn warnings off? */

double  expval = 1.;            /* global exposure value */

int     ncprocs = 0;            /* desired number of compute processes */

char    *outdev = NULL;         /* output device name */

time_t  starttime;              /* time we got started */
time_t  endtime;                /* time we should end by */
time_t  reporttime;             /* time for next report */

long    maxdisk;                /* maximum file space (bytes) */

int     rtargc = 1;             /* rtrace command */
char    *rtargv[128] = {"rtrace", NULL};

int     orig_mode = -1;         /* original file mode (-1 if unchanged) */

long    nraysdone = 0L;         /* number of rays done */
long    npacksdone = 0L;        /* number of packets done */

PACKET  *freepacks;             /* available packets */

char  *sigerr[NSIG];            /* signal error messages */

extern time_t   time();


main(argc, argv)
int     argc;
char    *argv[];
{
        HDGRID  hdg;
        int     i;
        int     force = 0;
                                                /* mark start time */
        starttime = time(NULL);
        initurand(10240);                       /* initialize urand */
        progname = argv[0];                     /* get arguments */
        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'w':                       /* turn off warnings */
                        nowarn++;
                        break;
                case 'f':                       /* force overwrite */
                        force++;
                        break;
                case 'n':                       /* compute processes */
                        if (i >= argc-2)
                                goto userr;
                        ncprocs = atoi(argv[++i]);
                        break;
                case 'o':                       /* output display */
                        if (i >= argc-2)
                                goto userr;
                        outdev = argv[++i];
                        break;
                default:
                        goto userr;
                }
                                                /* do we have a job? */
        if (outdev == NULL && ncprocs <= 0)
                goto userr;
                                                /* get root file name */
        rootname(froot, hdkfile=argv[i++]);
                                                /* load... */
        if (i < argc) {                         /* variables */
                loadvars(argv[i++]);
                                                        /* cmdline settings */
                for ( ; i < argc; i++)
                        if (setvariable(argv[i], matchvar) < 0) {
                                sprintf(errmsg, "unknown variable: %s",
                                                argv[i]);
                                error(USER, errmsg);
                        }
                                                        /* check settings */
                checkvalues();
                                                        /* load RIF if any */
                if (vdef(RIF))
                        getradfile(vval(RIF));
                                                        /* set defaults */
                setdefaults(&hdg);
                                                        /* holodeck exists? */
                if (!force && access(hdkfile, R_OK|W_OK) == 0)
                        error(USER,
                                "holodeck file exists -- use -f to overwrite");
                                                        /* create holodeck */
                creatholo(&hdg);
        } else {                                /* else load holodeck */
                loadholo();
                if (vdef(RIF))                          /* load RIF if any */
                        getradfile(vval(RIF));
        }
                                                /* initialize */
        initrholo();
                                                /* run */
        while (rholo())
                ;
                                                /* done */
        quit(0);
userr:
        fprintf(stderr,
"Usage: %s {-n nprocs|-o disp} [-w][-f] output.hdk [control.hif [VAR=val ..]]\n",
                        progname);
        quit(1);
}


onsig(signo)                            /* fatal signal */
int  signo;
{
        static int  gotsig = 0;

        if (gotsig++)                   /* two signals and we're gone! */
                _exit(signo);

        alarm(30);                      /* allow 30 seconds to clean up */
        signal(SIGALRM, SIG_DFL);       /* make certain we do die */
        eputs("signal - ");
        eputs(sigerr[signo]);
        eputs("\n");
        quit(3);
}


sigdie(signo, msg)                      /* set fatal signal */
int  signo;
char  *msg;
{
        if (signal(signo, onsig) == SIG_IGN)
                signal(signo, SIG_IGN);
        sigerr[signo] = msg;
}


int
resfmode(fd, mod)               /* restrict open file access mode */
int     fd, mod;
{
        struct stat     stbuf;
                                        /* get original mode */
        if (fstat(fd, &stbuf) < 0)
                error(SYSTEM, "cannot stat open holodeck file");
        mod &= stbuf.st_mode;           /* always more restrictive */
        if (mod == stbuf.st_mode)
                return(-1);             /* already set */
                                        /* else change it */
        if (fchmod(fd, mod) < 0) {
                error(WARNING, "cannot change holodeck file access mode");
                return(-1);
        }
        return(stbuf.st_mode);          /* return original mode */
}


initrholo()                     /* get our holodeck running */
{
        extern int      global_packet();
        register int    i;

        if (outdev != NULL)                     /* open output device */
                disp_open(outdev);
        else if (ncprocs > 0)                   /* else use global ray feed */
                init_global();
                                                /* record disk space limit */
        if (!vdef(DISKSPACE))
                maxdisk = 0;
        else
                maxdisk = 1024.*1024.*vflt(DISKSPACE);
                                                /* record end time */
        if (!vdef(TIME) || vflt(TIME) <= FTINY)
                endtime = 0;
        else
                endtime = starttime + vflt(TIME)*3600.;
                                                /* set up memory cache */
        if (outdev == NULL)
                hdcachesize = 0;        /* manual flushing */
        else if (vdef(CACHE))
                hdcachesize = 1024.*1024.*vflt(CACHE);
                                                /* open report file */
        if (vdef(REPORT)) {
                register char   *s = sskip2(vval(REPORT), 1);
                if (*s && freopen(s, "a", stderr) == NULL)
                        quit(2);
        }
                                                /* start rtrace */
        if (ncprocs > 0) {
                i = start_rtrace();
                if (i < 1)
                        error(USER, "cannot start rtrace process");
                if (vdef(REPORT)) {             /* make first report */
                        printargs(rtargc, rtargv, stderr);
                        report(0);
                }
                                                /* allocate packets */
                freepacks = (PACKET *)bmalloc(i*sizeof(PACKET));
                if (freepacks == NULL)
                        goto memerr;
                freepacks[--i].nr = 0;
                freepacks[i].next = NULL;
                if (!vbool(OBSTRUCTIONS)) {
                        freepacks[i].offset = (float *)bmalloc(
                                        RPACKSIZ*sizeof(float)*(i+1) );
                        if (freepacks[i].offset == NULL)
                                goto memerr;
                } else
                        freepacks[i].offset = NULL;
                while (i--) {
                        freepacks[i].nr = 0;
                        freepacks[i].offset = freepacks[i+1].offset == NULL ?
                                        NULL : freepacks[i+1].offset+RPACKSIZ ;
                        freepacks[i].next = &freepacks[i+1];
                }
        }
                                        /* set up signal handling */
        sigdie(SIGINT, "Interrupt");
        sigdie(SIGHUP, "Hangup");
        sigdie(SIGTERM, "Terminate");
        sigdie(SIGPIPE, "Broken pipe");
        sigdie(SIGALRM, "Alarm clock");
#ifdef  SIGXCPU
        sigdie(SIGXCPU, "CPU limit exceeded");
        sigdie(SIGXFSZ, "File size exceeded");
#endif
                                                /* protect holodeck file */
        orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
        return;
memerr:
        error(SYSTEM, "out of memory in initrholo");
}


rholo()                         /* holodeck main loop */
{
        static int      idle = 1;
        PACKET  *pl = NULL, *plend;
        register PACKET *p;
        time_t  t;
        long    l;

        if (outdev != NULL)             /* check display */
                if (!disp_check(idle))
                        return(0);
                                        /* display only? */
        if (ncprocs <= 0)
                return(1);
                                        /* check file size */
        if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
                error(WARNING, "file limit exceeded");
                return(0);
        }
                                        /* check time */
        if (endtime > 0 || reporttime > 0)
                t = time(NULL);
        if (endtime > 0 && t >= endtime) {
                error(WARNING, "time limit exceeded");
                return(0);
        }
        if (reporttime > 0 && t >= reporttime)
                report(t);
                                        /* get packets to process */
        while (freepacks != NULL) {
                p = freepacks; freepacks = p->next; p->next = NULL;
                if (!next_packet(p)) {
                        p->next = freepacks; freepacks = p;
                        break;
                }
                if (pl == NULL) pl = p;
                else plend->next = p;
                plend = p;
        }
        idle = pl == NULL && freepacks != NULL;
                                        /* are we out of stuff to do? */
        if (idle && outdev == NULL)
                return(0);
                                        /* else process packets */
        done_packets(do_packets(pl));
        return(1);                      /* and continue */
}


report(t)                       /* report progress so far */
time_t  t;
{
        if (t == 0)
                t = time(NULL);
        fprintf(stderr, "%s: %ld packets (%ld rays) done after %.2f hours\n",
                        progname, npacksdone, nraysdone, (t-starttime)/3600.);
        fflush(stderr);
        if (vdef(REPORT))
                reporttime = t + (time_t)(vflt(REPORT)*60.+.5);
}


setdefaults(gp)                 /* set default values */
register HDGRID *gp;
{
        extern char     *atos();
        register int    i;
        double  len[3], maxlen, d;
        char    buf[64];

        if (!vdef(SECTION)) {
                sprintf(errmsg, "%s must be defined", vnam(SECTION));
                error(USER, errmsg);
        }
        if (vdef(SECTION) > 1) {
                sprintf(errmsg, "ignoring all but first %s", vnam(SECTION));
                error(WARNING, errmsg);
        }
        if (sscanf(vval(SECTION),
                        "%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf",
                        &gp->orig[0], &gp->orig[1], &gp->orig[2],
                        &gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
                        &gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
                        &gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2]) != 12)
                badvalue(SECTION);
        maxlen = 0.;
        for (i = 0; i < 3; i++)
                if ((len[i] = VLEN(gp->xv[i])) > maxlen)
                        maxlen = len[i];
        if (!vdef(GRID)) {
                sprintf(buf, "%.4f", maxlen/8.);
                vval(GRID) = savqstr(buf);
                vdef(GRID)++;
        }
        if ((d = vflt(GRID)) <= FTINY)
                badvalue(GRID);
        for (i = 0; i < 3; i++)
                gp->grid[i] = len[i]/d + (1.-FTINY);
        if (!vdef(EXPOSURE)) {
                sprintf(errmsg, "%s must be defined", vnam(EXPOSURE));
                error(USER, errmsg);
        }
        expval = vval(EXPOSURE)[0] == '-' || vval(EXPOSURE)[0] == '+' ?
                        pow(2., vflt(EXPOSURE)) : vflt(EXPOSURE);
        if (!vdef(OCTREE)) {
                if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
                        error(SYSTEM, "out of memory");
                sprintf(vval(OCTREE), "%s.oct", froot);
                vdef(OCTREE)++;
        }
        if (!vdef(OBSTRUCTIONS)) {
                vval(OBSTRUCTIONS) = "T";
                vdef(OBSTRUCTIONS)++;
        }
        if (!vdef(VDIST)) {
                vval(VDIST) = "F";
                vdef(VDIST)++;
        }
        if (!vdef(OCCUPANCY)) {
                vval(OCCUPANCY) = "U";
                vdef(OCCUPANCY)++;
        }
                                /* append rendering options */
        if (vdef(RENDER))
                rtargc += wordstring(rtargv+rtargc, vval(RENDER));
}


creatholo(gp)                   /* create a holodeck output file */
HDGRID  *gp;
{
        extern char     VersionID[];
        long    endloc = 0;
        int     fd;
        FILE    *fp;
                                        /* open & truncate file */
        if ((fp = fopen(hdkfile, "w+")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
                error(SYSTEM, errmsg);
        }
                                        /* write information header */
        newheader("RADIANCE", fp);
        fprintf(fp, "SOFTWARE= %s\n", VersionID);
        printvars(fp);
        fputformat(HOLOFMT, fp);
        fputc('\n', fp);
        putw(HOLOMAGIC, fp);            /* put magic number & terminus */
        fwrite(&endloc, sizeof(long), 1, fp);
        fd = dup(fileno(fp));
        fclose(fp);                     /* flush and close stdio stream */
        hdinit(fd, gp);                 /* allocate and initialize index */
}


headline(s)                     /* process information header line */
char    *s;
{
        extern char     FMTSTR[];
        register char   *cp;
        char    fmt[32];

        if (formatval(fmt, s)) {
                if (strcmp(fmt, HOLOFMT)) {
                        sprintf(errmsg, "%s file \"%s\" has %s%s",
                                        HOLOFMT, hdkfile, FMTSTR, fmt);
                        error(USER, errmsg);
                }
                return;
        }
        for (cp = s; *cp; cp++)         /* take off any comments */
                if (*cp == '#') {
                        *cp = '\0';
                        break;
                }
        setvariable(s, matchvar);       /* don't flag errors */
}


loadholo()                      /* start loading a holodeck from fname */
{
        extern long     ftell();
        FILE    *fp;
        int     fd;
        long    fpos;
                                        /* open holodeck file */
        if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
                                ncprocs>0 ? "appending" : "reading");
                error(SYSTEM, errmsg);
        }
                                        /* load variables from header */
        getheader(fp, headline, NULL);
                                        /* check magic number */
        if (getw(fp) != HOLOMAGIC) {
                sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
                                hdkfile);
                error(USER, errmsg);
        }
        fread(&fpos, sizeof(long), 1, fp);
        if (fpos != 0)
                error(WARNING, "ignoring multiple sections in holodeck file");
        fpos = ftell(fp);                       /* get stdio position */
        fd = dup(fileno(fp));
        fclose(fp);                             /* done with stdio */
        lseek(fd, fpos, 0);                     /* align system file pointer */
        hdinit(fd, NULL);                       /* allocate and load index */
}


done_packets(pl)                /* handle finished packets */
PACKET  *pl;
{
        static int      n2flush = 0;
        register PACKET *p;

        while (pl != NULL) {
                p = pl; pl = p->next; p->next = NULL;
                if (p->nr > 0) {                /* add to holodeck */
                        bcopy((char *)p->ra,
                                (char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
                                p->nr*sizeof(RAYVAL));
                        if (outdev != NULL)     /* display it */
                                disp_packet((PACKHEAD *)p);
                        if (hdcachesize <= 0)   /* manual flushing */
                                n2flush += p->nr;
                        nraysdone += p->nr;
                        npacksdone++;
                }
                p->nr = 0;                      /* push onto free list */
                p->next = freepacks;
                freepacks = p;
        }
        if (n2flush > 512*RPACKSIZ*ncprocs) {
                hdflush(NULL);                  /* flush holodeck buffers */
                n2flush = 0;
        }
}


getradfile(rfargs)              /* run rad and get needed variables */
char    *rfargs;
{
        static short    mvar[] = {OCTREE,EXPOSURE,-1};
        static char     tf1[] = TEMPLATE;
        char    tf2[64];
        char    combuf[256];
        char    *pippt;
        register int    i;
        register char   *cp;
                                        /* create rad command */
        mktemp(tf1);
        sprintf(tf2, "%s.rif", tf1);
        sprintf(combuf,
                "rad -v 0 -s -e -w %s OPTFILE=%s | egrep '^[ \t]*(NOMATCH",
                        rfargs, tf1);
        cp = combuf;
        while (*cp){
                if (*cp == '|') pippt = cp;
                cp++;
        }                               /* match unset variables */
        for (i = 0; mvar[i] >= 0; i++)
                if (!vdef(mvar[i])) {
                        *cp++ = '|';
                        strcpy(cp, vnam(mvar[i]));
                        while (*cp) cp++;
                        pippt = NULL;
                }
        if (pippt != NULL)
                strcpy(pippt, "> /dev/null");   /* nothing to match */
        else
                sprintf(cp, ")[ \t]*=' > %s", tf2);
        if (system(combuf)) {
                error(SYSTEM, "cannot execute rad command");
                unlink(tf2);                    /* clean up */
                unlink(tf1);
                quit(1);
        }
        if (pippt == NULL) {
                loadvars(tf2);                  /* load variables */
                unlink(tf2);
        }
        rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */
        unlink(tf1);                    /* clean up */
}


rootname(rn, fn)                /* remove tail from end of fn */
register char   *rn, *fn;
{
        char    *tp, *dp;

        for (tp = NULL, dp = rn; *rn = *fn++; rn++)
                if (ISDIRSEP(*rn))
                        dp = rn;
                else if (*rn == '.')
                        tp = rn;
        if (tp != NULL && tp > dp)
                *tp = '\0';
}


badvalue(vc)                    /* report bad variable value and exit */
int     vc;
{
        sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
        error(USER, errmsg);
}


eputs(s)                        /* put error message to stderr */
register char  *s;
{
        static int  midline = 0;

        if (!*s)
                return;
        if (!midline++) {       /* prepend line with program name */
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}


wputs(s)                        /* put warning string to stderr */
char    *s;
{
        if (!nowarn)
                eputs(s);
}


quit(ec)                        /* exit program gracefully */
int     ec;
{
        int     status = 0;

        if (hdlist[0] != NULL) {        /* flush holodeck */
                if (ncprocs > 0) {
                        done_packets(flush_queue());
                        status = end_rtrace();  /* close rtrace */
                        hdflush(NULL);
                        if (vdef(REPORT)) {
                                long    fsiz, fuse;
                                report(0);
                                fsiz = hdfilen(hdlist[0]->fd);
                                fuse = hdfiluse(hdlist[0]->fd, 1);
                                fprintf(stderr,
                        "%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
                                                hdkfile, fsiz/(1024.*1024.),
                                                100.*(fsiz-fuse)/fsiz);
                        }
                } else
                        hdflush(NULL);
        }
        if (orig_mode >= 0)             /* reset holodeck access mode */
                fchmod(hdlist[0]->fd, orig_mode);
        if (outdev != NULL)             /* close display */
                disp_close();
        exit(ec ? ec : status);         /* exit */
}
Revision:	3.14
Committed:	Mon Dec 1 16:34:21 1997 UTC (26 years, 5 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 3.13:	+6 -0 lines
Log Message:	added "VDISTANCE" variable for virtual distance calculation changed ray sampling to low discrepency sequence
#	User	Rev	Content
1	gregl	3.1	/* Copyright (c) 1997 Silicon Graphics, Inc. */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ SGI";
5			#endif
6
7			/*
8			* Radiance holodeck generation controller
9			*/
10
11			#include "rholo.h"
12	gregl	3.14	#include "random.h"
13	gregl	3.1	#include "paths.h"
14	gregl	3.12	#include <signal.h>
15	gregl	3.1	#include <sys/types.h>
16	gregl	3.12	#include <sys/stat.h>
17	gregl	3.1
18			/* the following must be consistent with rholo.h */
19			int NVARS = NRHVARS; /* total number of variables */
20
21			VARIABLE vv[] = RHVINIT; /* variable-value pairs */
22
23			char progname; / our program name */
24			char hdkfile; / holodeck file name */
25			char froot[MAXPATH]; /* root file name */
26
27			int nowarn = 0; /* turn warnings off? */
28
29			double expval = 1.; /* global exposure value */
30
31			int ncprocs = 0; /* desired number of compute processes */
32
33			char outdev = NULL; / output device name */
34
35			time_t starttime; /* time we got started */
36			time_t endtime; /* time we should end by */
37			time_t reporttime; /* time for next report */
38
39	gregl	3.8	long maxdisk; /* maximum file space (bytes) */
40
41	gregl	3.1	int rtargc = 1; /* rtrace command */
42			char *rtargv[128] = {"rtrace", NULL};
43
44	gregl	3.12	int orig_mode = -1; /* original file mode (-1 if unchanged) */
45
46	gregl	3.1	long nraysdone = 0L; /* number of rays done */
47			long npacksdone = 0L; /* number of packets done */
48
49			PACKET freepacks; / available packets */
50
51	gregl	3.12	char sigerr[NSIG]; / signal error messages */
52
53	gregl	3.1	extern time_t time();
54
55
56			main(argc, argv)
57			int argc;
58			char *argv[];
59			{
60			HDGRID hdg;
61			int i;
62			int force = 0;
63	gregl	3.3	/* mark start time */
64			starttime = time(NULL);
65	gregl	3.14	initurand(10240); /* initialize urand */
66	gregl	3.1	progname = argv[0]; /* get arguments */
67			for (i = 1; i < argc && argv[i][0] == '-'; i++)
68			switch (argv[i][1]) {
69			case 'w': /* turn off warnings */
70			nowarn++;
71			break;
72			case 'f': /* force overwrite */
73			force++;
74			break;
75			case 'n': /* compute processes */
76			if (i >= argc-2)
77			goto userr;
78			ncprocs = atoi(argv[++i]);
79			break;
80			case 'o': /* output display */
81			if (i >= argc-2)
82			goto userr;
83			outdev = argv[++i];
84			break;
85			default:
86			goto userr;
87			}
88			/* do we have a job? */
89			if (outdev == NULL && ncprocs <= 0)
90			goto userr;
91			/* get root file name */
92			rootname(froot, hdkfile=argv[i++]);
93			/* load... */
94			if (i < argc) { /* variables */
95			loadvars(argv[i++]);
96			/* cmdline settings */
97			for ( ; i < argc; i++)
98			if (setvariable(argv[i], matchvar) < 0) {
99			sprintf(errmsg, "unknown variable: %s",
100			argv[i]);
101			error(USER, errmsg);
102			}
103			/* check settings */
104			checkvalues();
105			/* load RIF if any */
106			if (vdef(RIF))
107			getradfile(vval(RIF));
108			/* set defaults */
109			setdefaults(&hdg);
110			/* holodeck exists? */
111			if (!force && access(hdkfile, R_OK\|W_OK) == 0)
112			error(USER,
113			"holodeck file exists -- use -f to overwrite");
114			/* create holodeck */
115			creatholo(&hdg);
116	gregl	3.3	} else { /* else load holodeck */
117	gregl	3.1	loadholo();
118	gregl	3.3	if (vdef(RIF)) /* load RIF if any */
119			getradfile(vval(RIF));
120			}
121	gregl	3.1	/* initialize */
122			initrholo();
123			/* run */
124			while (rholo())
125			;
126			/* done */
127			quit(0);
128			userr:
129			fprintf(stderr,
130			"Usage: %s {-n nprocs\|-o disp} [-w][-f] output.hdk [control.hif [VAR=val ..]]\n",
131			progname);
132			quit(1);
133			}
134
135
136	gregl	3.12	onsig(signo) /* fatal signal */
137			int signo;
138			{
139			static int gotsig = 0;
140
141			if (gotsig++) /* two signals and we're gone! */
142			_exit(signo);
143
144			alarm(30); /* allow 30 seconds to clean up */
145			signal(SIGALRM, SIG_DFL); /* make certain we do die */
146			eputs("signal - ");
147			eputs(sigerr[signo]);
148			eputs("\n");
149			quit(3);
150			}
151
152
153			sigdie(signo, msg) /* set fatal signal */
154			int signo;
155			char *msg;
156			{
157			if (signal(signo, onsig) == SIG_IGN)
158			signal(signo, SIG_IGN);
159			sigerr[signo] = msg;
160			}
161
162
163			int
164			resfmode(fd, mod) /* restrict open file access mode */
165			int fd, mod;
166			{
167			struct stat stbuf;
168			/* get original mode */
169			if (fstat(fd, &stbuf) < 0)
170			error(SYSTEM, "cannot stat open holodeck file");
171			mod &= stbuf.st_mode; /* always more restrictive */
172			if (mod == stbuf.st_mode)
173			return(-1); /* already set */
174			/* else change it */
175			if (fchmod(fd, mod) < 0) {
176			error(WARNING, "cannot change holodeck file access mode");
177			return(-1);
178			}
179			return(stbuf.st_mode); /* return original mode */
180			}
181
182
183	gregl	3.1	initrholo() /* get our holodeck running */
184			{
185			extern int global_packet();
186			register int i;
187	gregl	3.4
188			if (outdev != NULL) /* open output device */
189			disp_open(outdev);
190	gregl	3.1	else if (ncprocs > 0) /* else use global ray feed */
191			init_global();
192	gregl	3.8	/* record disk space limit */
193			if (!vdef(DISKSPACE))
194			maxdisk = 0;
195			else
196	gregl	3.9	maxdisk = 1024.1024.vflt(DISKSPACE);
197	gregl	3.3	/* record end time */
198	gregl	3.1	if (!vdef(TIME) \|\| vflt(TIME) <= FTINY)
199			endtime = 0;
200			else
201			endtime = starttime + vflt(TIME)*3600.;
202			/* set up memory cache */
203	gregl	3.5	if (outdev == NULL)
204			hdcachesize = 0; /* manual flushing */
205			else if (vdef(CACHE))
206			hdcachesize = 1024.1024.vflt(CACHE);
207	gregl	3.1	/* open report file */
208			if (vdef(REPORT)) {
209			register char *s = sskip2(vval(REPORT), 1);
210			if (*s && freopen(s, "a", stderr) == NULL)
211			quit(2);
212			}
213			/* start rtrace */
214			if (ncprocs > 0) {
215			i = start_rtrace();
216			if (i < 1)
217			error(USER, "cannot start rtrace process");
218			if (vdef(REPORT)) { /* make first report */
219			printargs(rtargc, rtargv, stderr);
220			report(0);
221			}
222			/* allocate packets */
223			freepacks = (PACKET )bmalloc(isizeof(PACKET));
224			if (freepacks == NULL)
225			goto memerr;
226			freepacks[--i].nr = 0;
227			freepacks[i].next = NULL;
228			if (!vbool(OBSTRUCTIONS)) {
229			freepacks[i].offset = (float *)bmalloc(
230			RPACKSIZsizeof(float)(i+1) );
231			if (freepacks[i].offset == NULL)
232			goto memerr;
233			} else
234			freepacks[i].offset = NULL;
235			while (i--) {
236			freepacks[i].nr = 0;
237			freepacks[i].offset = freepacks[i+1].offset == NULL ?
238			NULL : freepacks[i+1].offset+RPACKSIZ ;
239			freepacks[i].next = &freepacks[i+1];
240			}
241			}
242	gregl	3.12	/* set up signal handling */
243			sigdie(SIGINT, "Interrupt");
244			sigdie(SIGHUP, "Hangup");
245			sigdie(SIGTERM, "Terminate");
246			sigdie(SIGPIPE, "Broken pipe");
247			sigdie(SIGALRM, "Alarm clock");
248			#ifdef SIGXCPU
249			sigdie(SIGXCPU, "CPU limit exceeded");
250			sigdie(SIGXFSZ, "File size exceeded");
251			#endif
252			/* protect holodeck file */
253			orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
254	gregl	3.1	return;
255			memerr:
256			error(SYSTEM, "out of memory in initrholo");
257			}
258
259
260			rholo() /* holodeck main loop */
261			{
262			static int idle = 1;
263			PACKET pl = NULL, plend;
264			register PACKET *p;
265			time_t t;
266			long l;
267	gregl	3.4
268			if (outdev != NULL) /* check display */
269			if (!disp_check(idle))
270			return(0);
271	gregl	3.1	/* display only? */
272			if (ncprocs <= 0)
273			return(1);
274			/* check file size */
275	gregl	3.9	if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
276	gregl	3.8	error(WARNING, "file limit exceeded");
277	gregl	3.1	return(0);
278	gregl	3.8	}
279	gregl	3.1	/* check time */
280	gregl	3.3	if (endtime > 0 \|\| reporttime > 0)
281	gregl	3.1	t = time(NULL);
282	gregl	3.8	if (endtime > 0 && t >= endtime) {
283			error(WARNING, "time limit exceeded");
284	gregl	3.1	return(0);
285	gregl	3.8	}
286	gregl	3.3	if (reporttime > 0 && t >= reporttime)
287	gregl	3.1	report(t);
288			/* get packets to process */
289			while (freepacks != NULL) {
290			p = freepacks; freepacks = p->next; p->next = NULL;
291			if (!next_packet(p)) {
292			p->next = freepacks; freepacks = p;
293			break;
294			}
295			if (pl == NULL) pl = p;
296			else plend->next = p;
297			plend = p;
298			}
299			idle = pl == NULL && freepacks != NULL;
300			/* are we out of stuff to do? */
301			if (idle && outdev == NULL)
302			return(0);
303			/* else process packets */
304			done_packets(do_packets(pl));
305			return(1); /* and continue */
306			}
307
308
309			report(t) /* report progress so far */
310			time_t t;
311			{
312			if (t == 0)
313			t = time(NULL);
314	gregl	3.2	fprintf(stderr, "%s: %ld packets (%ld rays) done after %.2f hours\n",
315	gregl	3.1	progname, npacksdone, nraysdone, (t-starttime)/3600.);
316	gregl	3.2	fflush(stderr);
317	gregl	3.3	if (vdef(REPORT))
318			reporttime = t + (time_t)(vflt(REPORT)*60.+.5);
319	gregl	3.1	}
320
321
322			setdefaults(gp) /* set default values */
323			register HDGRID *gp;
324			{
325			extern char *atos();
326			register int i;
327			double len[3], maxlen, d;
328			char buf[64];
329
330			if (!vdef(SECTION)) {
331			sprintf(errmsg, "%s must be defined", vnam(SECTION));
332			error(USER, errmsg);
333			}
334			if (vdef(SECTION) > 1) {
335			sprintf(errmsg, "ignoring all but first %s", vnam(SECTION));
336			error(WARNING, errmsg);
337			}
338			if (sscanf(vval(SECTION),
339			"%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf",
340			&gp->orig[0], &gp->orig[1], &gp->orig[2],
341			&gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
342			&gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
343			&gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2]) != 12)
344			badvalue(SECTION);
345			maxlen = 0.;
346			for (i = 0; i < 3; i++)
347			if ((len[i] = VLEN(gp->xv[i])) > maxlen)
348			maxlen = len[i];
349			if (!vdef(GRID)) {
350	gregl	3.2	sprintf(buf, "%.4f", maxlen/8.);
351	gregl	3.1	vval(GRID) = savqstr(buf);
352			vdef(GRID)++;
353			}
354			if ((d = vflt(GRID)) <= FTINY)
355			badvalue(GRID);
356			for (i = 0; i < 3; i++)
357			gp->grid[i] = len[i]/d + (1.-FTINY);
358			if (!vdef(EXPOSURE)) {
359			sprintf(errmsg, "%s must be defined", vnam(EXPOSURE));
360			error(USER, errmsg);
361			}
362			expval = vval(EXPOSURE)[0] == '-' \|\| vval(EXPOSURE)[0] == '+' ?
363			pow(2., vflt(EXPOSURE)) : vflt(EXPOSURE);
364			if (!vdef(OCTREE)) {
365			if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
366			error(SYSTEM, "out of memory");
367			sprintf(vval(OCTREE), "%s.oct", froot);
368			vdef(OCTREE)++;
369			}
370			if (!vdef(OBSTRUCTIONS)) {
371			vval(OBSTRUCTIONS) = "T";
372			vdef(OBSTRUCTIONS)++;
373	gregl	3.14	}
374			if (!vdef(VDIST)) {
375			vval(VDIST) = "F";
376			vdef(VDIST)++;
377	gregl	3.1	}
378			if (!vdef(OCCUPANCY)) {
379			vval(OCCUPANCY) = "U";
380			vdef(OCCUPANCY)++;
381			}
382			/* append rendering options */
383			if (vdef(RENDER))
384			rtargc += wordstring(rtargv+rtargc, vval(RENDER));
385			}
386
387
388			creatholo(gp) /* create a holodeck output file */
389			HDGRID *gp;
390			{
391	gregl	3.12	extern char VersionID[];
392	gregl	3.1	long endloc = 0;
393	gregl	3.10	int fd;
394	gregl	3.1	FILE *fp;
395			/* open & truncate file */
396			if ((fp = fopen(hdkfile, "w+")) == NULL) {
397			sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
398			error(SYSTEM, errmsg);
399			}
400			/* write information header */
401			newheader("RADIANCE", fp);
402	gregl	3.12	fprintf(fp, "SOFTWARE= %s\n", VersionID);
403	gregl	3.1	printvars(fp);
404			fputformat(HOLOFMT, fp);
405			fputc('\n', fp);
406			putw(HOLOMAGIC, fp); /* put magic number & terminus */
407			fwrite(&endloc, sizeof(long), 1, fp);
408	gregl	3.10	fd = dup(fileno(fp));
409			fclose(fp); /* flush and close stdio stream */
410			hdinit(fd, gp); /* allocate and initialize index */
411	gregl	3.1	}
412
413
414			headline(s) /* process information header line */
415			char *s;
416			{
417			extern char FMTSTR[];
418			register char *cp;
419			char fmt[32];
420
421	gregl	3.2	if (formatval(fmt, s)) {
422	gregl	3.1	if (strcmp(fmt, HOLOFMT)) {
423			sprintf(errmsg, "%s file \"%s\" has %s%s",
424			HOLOFMT, hdkfile, FMTSTR, fmt);
425			error(USER, errmsg);
426			}
427			return;
428			}
429			for (cp = s; cp; cp++) / take off any comments */
430			if (*cp == '#') {
431			*cp = '\0';
432			break;
433			}
434			setvariable(s, matchvar); /* don't flag errors */
435			}
436
437
438			loadholo() /* start loading a holodeck from fname */
439			{
440	gregl	3.10	extern long ftell();
441	gregl	3.1	FILE *fp;
442	gregl	3.10	int fd;
443			long fpos;
444	gregl	3.4	/* open holodeck file */
445			if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
446			sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
447			ncprocs>0 ? "appending" : "reading");
448	gregl	3.1	error(SYSTEM, errmsg);
449			}
450			/* load variables from header */
451			getheader(fp, headline, NULL);
452			/* check magic number */
453			if (getw(fp) != HOLOMAGIC) {
454			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
455			hdkfile);
456			error(USER, errmsg);
457			}
458	gregl	3.10	fread(&fpos, sizeof(long), 1, fp);
459			if (fpos != 0)
460	gregl	3.1	error(WARNING, "ignoring multiple sections in holodeck file");
461	gregl	3.10	fpos = ftell(fp); /* get stdio position */
462			fd = dup(fileno(fp));
463			fclose(fp); /* done with stdio */
464			lseek(fd, fpos, 0); /* align system file pointer */
465			hdinit(fd, NULL); /* allocate and load index */
466	gregl	3.1	}
467
468
469			done_packets(pl) /* handle finished packets */
470			PACKET *pl;
471			{
472	gregl	3.13	static int n2flush = 0;
473	gregl	3.1	register PACKET *p;
474
475			while (pl != NULL) {
476			p = pl; pl = p->next; p->next = NULL;
477			if (p->nr > 0) { /* add to holodeck */
478			bcopy((char *)p->ra,
479			(char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
480			p->nr*sizeof(RAYVAL));
481			if (outdev != NULL) /* display it */
482	gregl	3.7	disp_packet((PACKHEAD *)p);
483	gregl	3.13	if (hdcachesize <= 0) /* manual flushing */
484			n2flush += p->nr;
485	gregl	3.6	nraysdone += p->nr;
486			npacksdone++;
487	gregl	3.1	}
488			p->nr = 0; /* push onto free list */
489			p->next = freepacks;
490			freepacks = p;
491	gregl	3.5	}
492	gregl	3.13	if (n2flush > 512RPACKSIZncprocs) {
493	gregl	3.5	hdflush(NULL); /* flush holodeck buffers */
494	gregl	3.13	n2flush = 0;
495	gregl	3.1	}
496			}
497
498
499			getradfile(rfargs) /* run rad and get needed variables */
500			char *rfargs;
501			{
502	gregl	3.9	static short mvar[] = {OCTREE,EXPOSURE,-1};
503	gregl	3.1	static char tf1[] = TEMPLATE;
504			char tf2[64];
505			char combuf[256];
506	gregl	3.3	char *pippt;
507	gregl	3.1	register int i;
508			register char *cp;
509			/* create rad command */
510			mktemp(tf1);
511			sprintf(tf2, "%s.rif", tf1);
512			sprintf(combuf,
513			"rad -v 0 -s -e -w %s OPTFILE=%s \| egrep '^[ \t]*(NOMATCH",
514			rfargs, tf1);
515			cp = combuf;
516	gregl	3.3	while (*cp){
517			if (*cp == '\|') pippt = cp;
518			cp++;
519			} /* match unset variables */
520	gregl	3.1	for (i = 0; mvar[i] >= 0; i++)
521			if (!vdef(mvar[i])) {
522			*cp++ = '\|';
523			strcpy(cp, vnam(mvar[i]));
524			while (*cp) cp++;
525	gregl	3.3	pippt = NULL;
526	gregl	3.1	}
527	gregl	3.3	if (pippt != NULL)
528			strcpy(pippt, "> /dev/null"); /* nothing to match */
529			else
530			sprintf(cp, ")[ \t]*=' > %s", tf2);
531	gregl	3.1	if (system(combuf)) {
532			error(SYSTEM, "cannot execute rad command");
533			unlink(tf2); /* clean up */
534			unlink(tf1);
535			quit(1);
536			}
537	gregl	3.3	if (pippt == NULL) {
538			loadvars(tf2); /* load variables */
539			unlink(tf2);
540			}
541	gregl	3.1	rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */
542	gregl	3.3	unlink(tf1); /* clean up */
543	gregl	3.1	}
544
545
546			rootname(rn, fn) /* remove tail from end of fn */
547			register char rn, fn;
548			{
549			char tp, dp;
550
551			for (tp = NULL, dp = rn; rn = fn++; rn++)
552			if (ISDIRSEP(*rn))
553			dp = rn;
554			else if (*rn == '.')
555			tp = rn;
556			if (tp != NULL && tp > dp)
557			*tp = '\0';
558			}
559
560
561			badvalue(vc) /* report bad variable value and exit */
562			int vc;
563			{
564			sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
565			error(USER, errmsg);
566			}
567
568
569			eputs(s) /* put error message to stderr */
570			register char *s;
571			{
572			static int midline = 0;
573
574			if (!*s)
575			return;
576			if (!midline++) { /* prepend line with program name */
577			fputs(progname, stderr);
578			fputs(": ", stderr);
579			}
580			fputs(s, stderr);
581			if (s[strlen(s)-1] == '\n') {
582			fflush(stderr);
583			midline = 0;
584			}
585			}
586
587
588			wputs(s) /* put warning string to stderr */
589			char *s;
590			{
591			if (!nowarn)
592			eputs(s);
593			}
594
595
596			quit(ec) /* exit program gracefully */
597			int ec;
598			{
599			int status = 0;
600
601			if (hdlist[0] != NULL) { /* flush holodeck */
602			if (ncprocs > 0) {
603			done_packets(flush_queue());
604			status = end_rtrace(); /* close rtrace */
605			hdflush(NULL);
606			if (vdef(REPORT)) {
607			long fsiz, fuse;
608			report(0);
609	gregl	3.9	fsiz = hdfilen(hdlist[0]->fd);
610	gregl	3.1	fuse = hdfiluse(hdlist[0]->fd, 1);
611			fprintf(stderr,
612	gregl	3.3	"%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
613	gregl	3.1	hdkfile, fsiz/(1024.*1024.),
614			100.*(fsiz-fuse)/fsiz);
615			}
616			} else
617			hdflush(NULL);
618			}
619	gregl	3.12	if (orig_mode >= 0) /* reset holodeck access mode */
620			fchmod(hdlist[0]->fd, orig_mode);
621	gregl	3.11	if (outdev != NULL) /* close display */
622			disp_close();
623	gregl	3.1	exit(ec ? ec : status); /* exit */
624			}