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 <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[256];             /* root file name */

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

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

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

int     readinp = 0;            /* read commands from stdin */

int     force = 0;              /* allow overwrite of holodeck */

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;
                                                /* mark start time */
        starttime = time(NULL);
        initurand(16384);                       /* 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 'i':                       /* read input from stdin */
                        readinp++;
                        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;
                }
                                                /* get root file name */
        rootname(froot, hdkfile=argv[i++]);
                                                /* load variables? */
        if (i < argc)
                if (argv[i][0] != '-' && argv[i][0] != '+')
                        loadvars(argv[i]);      /* load variables from file */

        if (i >= argc || argv[i][0] == '+')
                loadholo();                     /* load existing holodeck */

        while (++i < argc)                      /* get command line settings */
                if (setvariable(argv[i], matchvar) < 0) {
                        sprintf(errmsg, "unknown variable: %s", argv[i]);
                        error(USER, errmsg);
                }
                                                /* check settings */
        checkvalues();
                                                /* load RIF if any */
        getradfile();

        if (hdlist[i] == NULL) {                /* create new holodeck */
                                                        /* 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 just set defaults */
                setdefaults(NULL);
                                                /* initialize */
        initrholo();
                                                /* main loop */
        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;
                                                /* close holodeck on exec() */
        fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);

        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. + .5;
                                                /* 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(es)");
                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 (!vdef(OBSTRUCTIONS) || !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 (nprocs <= 0)
                return(outdev != NULL);
                                        /* check file size */
        if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
                error(WARNING, "file limit exceeded");
                done_rtrace();
                idle = 1;
                return(1);      /* comes back */
        }
                                        /* check time */
        if (endtime > 0 || reporttime > 0)
                t = time(NULL);
        if (endtime > 0 && t >= endtime) {
                error(WARNING, "time limit exceeded");
                done_rtrace();
                idle = 1;
                return(1);      /* comes back */
        }
        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;
                        idle = 1;
                        break;
                }
                if (pl == NULL) pl = p;
                else plend->next = p;
                plend = p;
        }
                                        /* process packets */
        done_packets(do_packets(pl));
        return(1);                      /* and continue */
}


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 (!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(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));
        
        if (gp == NULL)         /* already initialized? */
                return;
                                /* set grid parameters */
        gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
        if (sscanf(vval(SECTION),
                "%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
                        &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],
                        &gp->grid[0], &gp->grid[1], &gp->grid[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++)
                if (gp->grid[i] <= 0)
                        gp->grid[i] = len[i]/d + (1.-FTINY);
}


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*nprocs) {
                hdflush(NULL);                  /* flush holodeck buffers */
                n2flush = 0;
        }
}


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 (*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) {        /* close holodeck */
                if (nprocs > 0)
                        status = done_rtrace();         /* calls hdsync() */
                if (ncprocs > 0 && vdef(REPORT)) {
                        long    fsiz, fuse;
                        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);
                }
        }
        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:	3.27
Committed:	Sun Dec 14 09:46:52 1997 UTC (27 years, 10 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 3.26:	+21 -23 lines
Log Message:	allow command-line setting of variables even when reusing holodeck
#	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	3.12	#include <signal.h>
14	gregl	3.1	#include <sys/types.h>
15	gregl	3.12	#include <sys/stat.h>
16	gregl	3.1
17			/* the following must be consistent with rholo.h */
18			int NVARS = NRHVARS; /* total number of variables */
19
20			VARIABLE vv[] = RHVINIT; /* variable-value pairs */
21
22			char progname; / our program name */
23			char hdkfile; / holodeck file name */
24	gregl	3.22	char froot[256]; /* root file name */
25	gregl	3.1
26			int nowarn = 0; /* turn warnings off? */
27
28			int ncprocs = 0; /* desired number of compute processes */
29
30			char outdev = NULL; / output device name */
31
32	gregl	3.17	int readinp = 0; /* read commands from stdin */
33
34	gregl	3.20	int force = 0; /* allow overwrite of holodeck */
35
36	gregl	3.1	time_t starttime; /* time we got started */
37			time_t endtime; /* time we should end by */
38			time_t reporttime; /* time for next report */
39
40	gregl	3.8	long maxdisk; /* maximum file space (bytes) */
41
42	gregl	3.1	int rtargc = 1; /* rtrace command */
43			char *rtargv[128] = {"rtrace", NULL};
44
45	gregl	3.12	int orig_mode = -1; /* original file mode (-1 if unchanged) */
46
47	gregl	3.1	long nraysdone = 0L; /* number of rays done */
48			long npacksdone = 0L; /* number of packets done */
49
50			PACKET freepacks; / available packets */
51
52	gregl	3.12	char sigerr[NSIG]; / signal error messages */
53
54	gregl	3.1	extern time_t time();
55
56
57			main(argc, argv)
58			int argc;
59			char *argv[];
60			{
61			HDGRID hdg;
62			int i;
63	gregl	3.3	/* mark start time */
64			starttime = time(NULL);
65	gregl	3.18	initurand(16384); /* 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	gregl	3.17	case 'i': /* read input from stdin */
76			readinp++;
77			break;
78	gregl	3.1	case 'n': /* compute processes */
79			if (i >= argc-2)
80			goto userr;
81			ncprocs = atoi(argv[++i]);
82			break;
83			case 'o': /* output display */
84			if (i >= argc-2)
85			goto userr;
86			outdev = argv[++i];
87			break;
88			default:
89			goto userr;
90			}
91			/* get root file name */
92			rootname(froot, hdkfile=argv[i++]);
93	gregl	3.27	/* load variables? */
94			if (i < argc)
95			if (argv[i][0] != '-' && argv[i][0] != '+')
96			loadvars(argv[i]); /* load variables from file */
97
98			if (i >= argc \|\| argv[i][0] == '+')
99			loadholo(); /* load existing holodeck */
100
101			while (++i < argc) /* get command line settings */
102			if (setvariable(argv[i], matchvar) < 0) {
103			sprintf(errmsg, "unknown variable: %s", argv[i]);
104			error(USER, errmsg);
105			}
106			/* check settings */
107			checkvalues();
108			/* load RIF if any */
109			getradfile();
110
111			if (hdlist[i] == NULL) { /* create new holodeck */
112	gregl	3.1	/* set defaults */
113			setdefaults(&hdg);
114			/* holodeck exists? */
115			if (!force && access(hdkfile, R_OK\|W_OK) == 0)
116			error(USER,
117			"holodeck file exists -- use -f to overwrite");
118			/* create holodeck */
119			creatholo(&hdg);
120	gregl	3.27	} else /* else just set defaults */
121	gregl	3.15	setdefaults(NULL);
122	gregl	3.1	/* initialize */
123			initrholo();
124	gregl	3.15	/* main loop */
125	gregl	3.1	while (rholo())
126			;
127			/* done */
128			quit(0);
129			userr:
130			fprintf(stderr,
131	gregl	3.27	"Usage: %s [-n nprocs][-o disp][-w][-f] output.hdk [control.hif\|+\|- [VAR=val ..]]\n",
132	gregl	3.1	progname);
133			quit(1);
134			}
135
136
137	gregl	3.12	onsig(signo) /* fatal signal */
138			int signo;
139			{
140			static int gotsig = 0;
141
142			if (gotsig++) /* two signals and we're gone! */
143			_exit(signo);
144
145			alarm(30); /* allow 30 seconds to clean up */
146			signal(SIGALRM, SIG_DFL); /* make certain we do die */
147			eputs("signal - ");
148			eputs(sigerr[signo]);
149			eputs("\n");
150			quit(3);
151			}
152
153
154			sigdie(signo, msg) /* set fatal signal */
155			int signo;
156			char *msg;
157			{
158			if (signal(signo, onsig) == SIG_IGN)
159			signal(signo, SIG_IGN);
160			sigerr[signo] = msg;
161			}
162
163
164			int
165			resfmode(fd, mod) /* restrict open file access mode */
166			int fd, mod;
167			{
168			struct stat stbuf;
169			/* get original mode */
170			if (fstat(fd, &stbuf) < 0)
171			error(SYSTEM, "cannot stat open holodeck file");
172			mod &= stbuf.st_mode; /* always more restrictive */
173			if (mod == stbuf.st_mode)
174			return(-1); /* already set */
175			/* else change it */
176			if (fchmod(fd, mod) < 0) {
177			error(WARNING, "cannot change holodeck file access mode");
178			return(-1);
179			}
180			return(stbuf.st_mode); /* return original mode */
181			}
182
183
184	gregl	3.1	initrholo() /* get our holodeck running */
185			{
186			extern int global_packet();
187			register int i;
188	gregl	3.17	/* close holodeck on exec() */
189			fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);
190	gregl	3.4
191			if (outdev != NULL) /* open output device */
192			disp_open(outdev);
193	gregl	3.1	else if (ncprocs > 0) /* else use global ray feed */
194			init_global();
195	gregl	3.8	/* record disk space limit */
196			if (!vdef(DISKSPACE))
197			maxdisk = 0;
198			else
199	gregl	3.9	maxdisk = 1024.1024.vflt(DISKSPACE);
200	gregl	3.3	/* record end time */
201	gregl	3.1	if (!vdef(TIME) \|\| vflt(TIME) <= FTINY)
202			endtime = 0;
203			else
204	gregl	3.23	endtime = starttime + vflt(TIME)*3600. + .5;
205	gregl	3.1	/* set up memory cache */
206	gregl	3.5	if (outdev == NULL)
207			hdcachesize = 0; /* manual flushing */
208			else if (vdef(CACHE))
209			hdcachesize = 1024.1024.vflt(CACHE);
210	gregl	3.1	/* open report file */
211			if (vdef(REPORT)) {
212			register char *s = sskip2(vval(REPORT), 1);
213			if (*s && freopen(s, "a", stderr) == NULL)
214			quit(2);
215			}
216			/* start rtrace */
217			if (ncprocs > 0) {
218			i = start_rtrace();
219			if (i < 1)
220	gregl	3.20	error(USER, "cannot start rtrace process(es)");
221	gregl	3.1	if (vdef(REPORT)) { /* make first report */
222			printargs(rtargc, rtargv, stderr);
223			report(0);
224			}
225			/* allocate packets */
226			freepacks = (PACKET )bmalloc(isizeof(PACKET));
227			if (freepacks == NULL)
228			goto memerr;
229			freepacks[--i].nr = 0;
230			freepacks[i].next = NULL;
231	gregl	3.25	if (!vdef(OBSTRUCTIONS) \|\| !vbool(OBSTRUCTIONS)) {
232	gregl	3.1	freepacks[i].offset = (float *)bmalloc(
233			RPACKSIZsizeof(float)(i+1) );
234			if (freepacks[i].offset == NULL)
235			goto memerr;
236			} else
237			freepacks[i].offset = NULL;
238			while (i--) {
239			freepacks[i].nr = 0;
240			freepacks[i].offset = freepacks[i+1].offset == NULL ?
241			NULL : freepacks[i+1].offset+RPACKSIZ ;
242			freepacks[i].next = &freepacks[i+1];
243			}
244			}
245	gregl	3.12	/* set up signal handling */
246			sigdie(SIGINT, "Interrupt");
247			sigdie(SIGHUP, "Hangup");
248			sigdie(SIGTERM, "Terminate");
249			sigdie(SIGPIPE, "Broken pipe");
250			sigdie(SIGALRM, "Alarm clock");
251			#ifdef SIGXCPU
252			sigdie(SIGXCPU, "CPU limit exceeded");
253			sigdie(SIGXFSZ, "File size exceeded");
254			#endif
255			/* protect holodeck file */
256			orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
257	gregl	3.1	return;
258			memerr:
259			error(SYSTEM, "out of memory in initrholo");
260			}
261
262
263			rholo() /* holodeck main loop */
264			{
265			static int idle = 1;
266			PACKET pl = NULL, plend;
267			register PACKET *p;
268			time_t t;
269			long l;
270	gregl	3.4
271			if (outdev != NULL) /* check display */
272			if (!disp_check(idle))
273			return(0);
274	gregl	3.1	/* display only? */
275	gregl	3.19	if (nprocs <= 0)
276	gregl	3.21	return(outdev != NULL);
277	gregl	3.1	/* check file size */
278	gregl	3.9	if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
279	gregl	3.8	error(WARNING, "file limit exceeded");
280	gregl	3.21	done_rtrace();
281			idle = 1;
282			return(1); /* comes back */
283	gregl	3.8	}
284	gregl	3.1	/* check time */
285	gregl	3.3	if (endtime > 0 \|\| reporttime > 0)
286	gregl	3.1	t = time(NULL);
287	gregl	3.8	if (endtime > 0 && t >= endtime) {
288			error(WARNING, "time limit exceeded");
289	gregl	3.21	done_rtrace();
290			idle = 1;
291			return(1); /* comes back */
292	gregl	3.8	}
293	gregl	3.3	if (reporttime > 0 && t >= reporttime)
294	gregl	3.1	report(t);
295			/* get packets to process */
296			while (freepacks != NULL) {
297			p = freepacks; freepacks = p->next; p->next = NULL;
298			if (!next_packet(p)) {
299			p->next = freepacks; freepacks = p;
300	gregl	3.21	idle = 1;
301	gregl	3.1	break;
302			}
303			if (pl == NULL) pl = p;
304			else plend->next = p;
305			plend = p;
306			}
307	gregl	3.21	/* process packets */
308	gregl	3.1	done_packets(do_packets(pl));
309			return(1); /* and continue */
310			}
311
312
313			setdefaults(gp) /* set default values */
314			register HDGRID *gp;
315			{
316			extern char *atos();
317			register int i;
318			double len[3], maxlen, d;
319			char buf[64];
320
321			if (!vdef(SECTION)) {
322			sprintf(errmsg, "%s must be defined", vnam(SECTION));
323			error(USER, errmsg);
324			}
325			if (vdef(SECTION) > 1) {
326			sprintf(errmsg, "ignoring all but first %s", vnam(SECTION));
327			error(WARNING, errmsg);
328			}
329			if (!vdef(OCTREE)) {
330			if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
331			error(SYSTEM, "out of memory");
332			sprintf(vval(OCTREE), "%s.oct", froot);
333			vdef(OCTREE)++;
334	gregl	3.14	}
335			if (!vdef(VDIST)) {
336			vval(VDIST) = "F";
337			vdef(VDIST)++;
338	gregl	3.1	}
339			if (!vdef(OCCUPANCY)) {
340			vval(OCCUPANCY) = "U";
341			vdef(OCCUPANCY)++;
342			}
343			/* append rendering options */
344			if (vdef(RENDER))
345			rtargc += wordstring(rtargv+rtargc, vval(RENDER));
346	gregl	3.15
347			if (gp == NULL) /* already initialized? */
348			return;
349			/* set grid parameters */
350	gregl	3.16	gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
351	gregl	3.15	if (sscanf(vval(SECTION),
352	gregl	3.16	"%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
353	gregl	3.15	&gp->orig[0], &gp->orig[1], &gp->orig[2],
354			&gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
355			&gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
356	gregl	3.16	&gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
357			&gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
358	gregl	3.15	badvalue(SECTION);
359			maxlen = 0.;
360			for (i = 0; i < 3; i++)
361			if ((len[i] = VLEN(gp->xv[i])) > maxlen)
362			maxlen = len[i];
363			if (!vdef(GRID)) {
364			sprintf(buf, "%.4f", maxlen/8.);
365			vval(GRID) = savqstr(buf);
366			vdef(GRID)++;
367			}
368			if ((d = vflt(GRID)) <= FTINY)
369			badvalue(GRID);
370			for (i = 0; i < 3; i++)
371	gregl	3.16	if (gp->grid[i] <= 0)
372			gp->grid[i] = len[i]/d + (1.-FTINY);
373	gregl	3.1	}
374
375
376			creatholo(gp) /* create a holodeck output file */
377			HDGRID *gp;
378			{
379	gregl	3.12	extern char VersionID[];
380	gregl	3.1	long endloc = 0;
381	gregl	3.10	int fd;
382	gregl	3.1	FILE *fp;
383			/* open & truncate file */
384			if ((fp = fopen(hdkfile, "w+")) == NULL) {
385			sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
386			error(SYSTEM, errmsg);
387			}
388			/* write information header */
389			newheader("RADIANCE", fp);
390	gregl	3.12	fprintf(fp, "SOFTWARE= %s\n", VersionID);
391	gregl	3.1	printvars(fp);
392			fputformat(HOLOFMT, fp);
393			fputc('\n', fp);
394			putw(HOLOMAGIC, fp); /* put magic number & terminus */
395			fwrite(&endloc, sizeof(long), 1, fp);
396	gregl	3.10	fd = dup(fileno(fp));
397			fclose(fp); /* flush and close stdio stream */
398			hdinit(fd, gp); /* allocate and initialize index */
399	gregl	3.1	}
400
401
402			headline(s) /* process information header line */
403			char *s;
404			{
405			extern char FMTSTR[];
406			register char *cp;
407			char fmt[32];
408
409	gregl	3.2	if (formatval(fmt, s)) {
410	gregl	3.1	if (strcmp(fmt, HOLOFMT)) {
411			sprintf(errmsg, "%s file \"%s\" has %s%s",
412			HOLOFMT, hdkfile, FMTSTR, fmt);
413			error(USER, errmsg);
414			}
415			return;
416			}
417			for (cp = s; cp; cp++) / take off any comments */
418			if (*cp == '#') {
419			*cp = '\0';
420			break;
421			}
422			setvariable(s, matchvar); /* don't flag errors */
423			}
424
425
426			loadholo() /* start loading a holodeck from fname */
427			{
428	gregl	3.10	extern long ftell();
429	gregl	3.1	FILE *fp;
430	gregl	3.10	int fd;
431			long fpos;
432	gregl	3.4	/* open holodeck file */
433			if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
434			sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
435			ncprocs>0 ? "appending" : "reading");
436	gregl	3.1	error(SYSTEM, errmsg);
437			}
438			/* load variables from header */
439			getheader(fp, headline, NULL);
440			/* check magic number */
441			if (getw(fp) != HOLOMAGIC) {
442			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
443			hdkfile);
444			error(USER, errmsg);
445			}
446	gregl	3.10	fread(&fpos, sizeof(long), 1, fp);
447			if (fpos != 0)
448	gregl	3.1	error(WARNING, "ignoring multiple sections in holodeck file");
449	gregl	3.10	fpos = ftell(fp); /* get stdio position */
450			fd = dup(fileno(fp));
451			fclose(fp); /* done with stdio */
452			lseek(fd, fpos, 0); /* align system file pointer */
453			hdinit(fd, NULL); /* allocate and load index */
454	gregl	3.1	}
455
456
457			done_packets(pl) /* handle finished packets */
458			PACKET *pl;
459			{
460	gregl	3.13	static int n2flush = 0;
461	gregl	3.1	register PACKET *p;
462
463			while (pl != NULL) {
464			p = pl; pl = p->next; p->next = NULL;
465			if (p->nr > 0) { /* add to holodeck */
466			bcopy((char *)p->ra,
467			(char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
468			p->nr*sizeof(RAYVAL));
469			if (outdev != NULL) /* display it */
470	gregl	3.7	disp_packet((PACKHEAD *)p);
471	gregl	3.13	if (hdcachesize <= 0) /* manual flushing */
472			n2flush += p->nr;
473	gregl	3.6	nraysdone += p->nr;
474			npacksdone++;
475	gregl	3.1	}
476			p->nr = 0; /* push onto free list */
477			p->next = freepacks;
478			freepacks = p;
479	gregl	3.5	}
480	gregl	3.19	if (n2flush > 512RPACKSIZnprocs) {
481	gregl	3.5	hdflush(NULL); /* flush holodeck buffers */
482	gregl	3.13	n2flush = 0;
483	gregl	3.1	}
484			}
485
486
487			rootname(rn, fn) /* remove tail from end of fn */
488			register char rn, fn;
489			{
490			char tp, dp;
491
492			for (tp = NULL, dp = rn; rn = fn++; rn++)
493	gregl	3.22	if (*rn == '/')
494	gregl	3.1	dp = rn;
495			else if (*rn == '.')
496			tp = rn;
497			if (tp != NULL && tp > dp)
498			*tp = '\0';
499			}
500
501
502			badvalue(vc) /* report bad variable value and exit */
503			int vc;
504			{
505			sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
506			error(USER, errmsg);
507			}
508
509
510			eputs(s) /* put error message to stderr */
511			register char *s;
512			{
513			static int midline = 0;
514
515			if (!*s)
516			return;
517			if (!midline++) { /* prepend line with program name */
518			fputs(progname, stderr);
519			fputs(": ", stderr);
520			}
521			fputs(s, stderr);
522			if (s[strlen(s)-1] == '\n') {
523			fflush(stderr);
524			midline = 0;
525			}
526			}
527
528
529			wputs(s) /* put warning string to stderr */
530			char *s;
531			{
532			if (!nowarn)
533			eputs(s);
534			}
535
536
537			quit(ec) /* exit program gracefully */
538			int ec;
539			{
540			int status = 0;
541
542	gregl	3.24	if (hdlist[0] != NULL) { /* close holodeck */
543	gregl	3.21	if (nprocs > 0)
544	gregl	3.24	status = done_rtrace(); /* calls hdsync() */
545	gregl	3.19	if (ncprocs > 0 && vdef(REPORT)) {
546			long fsiz, fuse;
547			fsiz = hdfilen(hdlist[0]->fd);
548			fuse = hdfiluse(hdlist[0]->fd, 1);
549			fprintf(stderr,
550	gregl	3.3	"%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
551	gregl	3.19	hdkfile, fsiz/(1024.*1024.),
552			100.*(fsiz-fuse)/fsiz);
553			}
554	gregl	3.1	}
555	gregl	3.12	if (orig_mode >= 0) /* reset holodeck access mode */
556			fchmod(hdlist[0]->fd, orig_mode);
557	gregl	3.11	if (outdev != NULL) /* close display */
558			disp_close();
559	gregl	3.1	exit(ec ? ec : status); /* exit */
560			}