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;
                }
                                                /* 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 */
                getradfile();
                                                        /* 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();
                                                        /* check settings */
                checkvalues();
                                                        /* load RIF if any */
                getradfile();
                                                        /* 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:	3.25
Committed:	Sat Dec 13 10:30:56 1997 UTC (26 years, 4 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 3.24:	+1 -5 lines
Log Message:	allow OBSTRUCTIONS to be undefined, and use random offset in that case
#	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			/* do we have a job? */
92			if (outdev == NULL && ncprocs <= 0)
93			goto userr;
94			/* get root file name */
95			rootname(froot, hdkfile=argv[i++]);
96			/* load... */
97			if (i < argc) { /* variables */
98			loadvars(argv[i++]);
99			/* cmdline settings */
100			for ( ; i < argc; i++)
101			if (setvariable(argv[i], matchvar) < 0) {
102			sprintf(errmsg, "unknown variable: %s",
103			argv[i]);
104			error(USER, errmsg);
105			}
106			/* check settings */
107			checkvalues();
108			/* load RIF if any */
109	gregl	3.22	getradfile();
110	gregl	3.1	/* set defaults */
111			setdefaults(&hdg);
112			/* holodeck exists? */
113			if (!force && access(hdkfile, R_OK\|W_OK) == 0)
114			error(USER,
115			"holodeck file exists -- use -f to overwrite");
116			/* create holodeck */
117			creatholo(&hdg);
118	gregl	3.3	} else { /* else load holodeck */
119	gregl	3.1	loadholo();
120	gregl	3.15	/* check settings */
121			checkvalues();
122			/* load RIF if any */
123	gregl	3.22	getradfile();
124	gregl	3.15	/* set defaults */
125			setdefaults(NULL);
126	gregl	3.3	}
127	gregl	3.1	/* initialize */
128			initrholo();
129	gregl	3.15	/* main loop */
130	gregl	3.1	while (rholo())
131			;
132			/* done */
133			quit(0);
134			userr:
135			fprintf(stderr,
136			"Usage: %s {-n nprocs\|-o disp} [-w][-f] output.hdk [control.hif [VAR=val ..]]\n",
137			progname);
138			quit(1);
139			}
140
141
142	gregl	3.12	onsig(signo) /* fatal signal */
143			int signo;
144			{
145			static int gotsig = 0;
146
147			if (gotsig++) /* two signals and we're gone! */
148			_exit(signo);
149
150			alarm(30); /* allow 30 seconds to clean up */
151			signal(SIGALRM, SIG_DFL); /* make certain we do die */
152			eputs("signal - ");
153			eputs(sigerr[signo]);
154			eputs("\n");
155			quit(3);
156			}
157
158
159			sigdie(signo, msg) /* set fatal signal */
160			int signo;
161			char *msg;
162			{
163			if (signal(signo, onsig) == SIG_IGN)
164			signal(signo, SIG_IGN);
165			sigerr[signo] = msg;
166			}
167
168
169			int
170			resfmode(fd, mod) /* restrict open file access mode */
171			int fd, mod;
172			{
173			struct stat stbuf;
174			/* get original mode */
175			if (fstat(fd, &stbuf) < 0)
176			error(SYSTEM, "cannot stat open holodeck file");
177			mod &= stbuf.st_mode; /* always more restrictive */
178			if (mod == stbuf.st_mode)
179			return(-1); /* already set */
180			/* else change it */
181			if (fchmod(fd, mod) < 0) {
182			error(WARNING, "cannot change holodeck file access mode");
183			return(-1);
184			}
185			return(stbuf.st_mode); /* return original mode */
186			}
187
188
189	gregl	3.1	initrholo() /* get our holodeck running */
190			{
191			extern int global_packet();
192			register int i;
193	gregl	3.17	/* close holodeck on exec() */
194			fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);
195	gregl	3.4
196			if (outdev != NULL) /* open output device */
197			disp_open(outdev);
198	gregl	3.1	else if (ncprocs > 0) /* else use global ray feed */
199			init_global();
200	gregl	3.8	/* record disk space limit */
201			if (!vdef(DISKSPACE))
202			maxdisk = 0;
203			else
204	gregl	3.9	maxdisk = 1024.1024.vflt(DISKSPACE);
205	gregl	3.3	/* record end time */
206	gregl	3.1	if (!vdef(TIME) \|\| vflt(TIME) <= FTINY)
207			endtime = 0;
208			else
209	gregl	3.23	endtime = starttime + vflt(TIME)*3600. + .5;
210	gregl	3.1	/* set up memory cache */
211	gregl	3.5	if (outdev == NULL)
212			hdcachesize = 0; /* manual flushing */
213			else if (vdef(CACHE))
214			hdcachesize = 1024.1024.vflt(CACHE);
215	gregl	3.1	/* open report file */
216			if (vdef(REPORT)) {
217			register char *s = sskip2(vval(REPORT), 1);
218			if (*s && freopen(s, "a", stderr) == NULL)
219			quit(2);
220			}
221			/* start rtrace */
222			if (ncprocs > 0) {
223			i = start_rtrace();
224			if (i < 1)
225	gregl	3.20	error(USER, "cannot start rtrace process(es)");
226	gregl	3.1	if (vdef(REPORT)) { /* make first report */
227			printargs(rtargc, rtargv, stderr);
228			report(0);
229			}
230			/* allocate packets */
231			freepacks = (PACKET )bmalloc(isizeof(PACKET));
232			if (freepacks == NULL)
233			goto memerr;
234			freepacks[--i].nr = 0;
235			freepacks[i].next = NULL;
236	gregl	3.25	if (!vdef(OBSTRUCTIONS) \|\| !vbool(OBSTRUCTIONS)) {
237	gregl	3.1	freepacks[i].offset = (float *)bmalloc(
238			RPACKSIZsizeof(float)(i+1) );
239			if (freepacks[i].offset == NULL)
240			goto memerr;
241			} else
242			freepacks[i].offset = NULL;
243			while (i--) {
244			freepacks[i].nr = 0;
245			freepacks[i].offset = freepacks[i+1].offset == NULL ?
246			NULL : freepacks[i+1].offset+RPACKSIZ ;
247			freepacks[i].next = &freepacks[i+1];
248			}
249			}
250	gregl	3.12	/* set up signal handling */
251			sigdie(SIGINT, "Interrupt");
252			sigdie(SIGHUP, "Hangup");
253			sigdie(SIGTERM, "Terminate");
254			sigdie(SIGPIPE, "Broken pipe");
255			sigdie(SIGALRM, "Alarm clock");
256			#ifdef SIGXCPU
257			sigdie(SIGXCPU, "CPU limit exceeded");
258			sigdie(SIGXFSZ, "File size exceeded");
259			#endif
260			/* protect holodeck file */
261			orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
262	gregl	3.1	return;
263			memerr:
264			error(SYSTEM, "out of memory in initrholo");
265			}
266
267
268			rholo() /* holodeck main loop */
269			{
270			static int idle = 1;
271			PACKET pl = NULL, plend;
272			register PACKET *p;
273			time_t t;
274			long l;
275	gregl	3.4
276			if (outdev != NULL) /* check display */
277			if (!disp_check(idle))
278			return(0);
279	gregl	3.1	/* display only? */
280	gregl	3.19	if (nprocs <= 0)
281	gregl	3.21	return(outdev != NULL);
282	gregl	3.1	/* check file size */
283	gregl	3.9	if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
284	gregl	3.8	error(WARNING, "file limit exceeded");
285	gregl	3.21	done_rtrace();
286			idle = 1;
287			return(1); /* comes back */
288	gregl	3.8	}
289	gregl	3.1	/* check time */
290	gregl	3.3	if (endtime > 0 \|\| reporttime > 0)
291	gregl	3.1	t = time(NULL);
292	gregl	3.8	if (endtime > 0 && t >= endtime) {
293			error(WARNING, "time limit exceeded");
294	gregl	3.21	done_rtrace();
295			idle = 1;
296			return(1); /* comes back */
297	gregl	3.8	}
298	gregl	3.3	if (reporttime > 0 && t >= reporttime)
299	gregl	3.1	report(t);
300			/* get packets to process */
301			while (freepacks != NULL) {
302			p = freepacks; freepacks = p->next; p->next = NULL;
303			if (!next_packet(p)) {
304			p->next = freepacks; freepacks = p;
305	gregl	3.21	idle = 1;
306	gregl	3.1	break;
307			}
308			if (pl == NULL) pl = p;
309			else plend->next = p;
310			plend = p;
311			}
312	gregl	3.21	/* process packets */
313	gregl	3.1	done_packets(do_packets(pl));
314			return(1); /* and continue */
315			}
316
317
318			setdefaults(gp) /* set default values */
319			register HDGRID *gp;
320			{
321			extern char *atos();
322			register int i;
323			double len[3], maxlen, d;
324			char buf[64];
325
326			if (!vdef(SECTION)) {
327			sprintf(errmsg, "%s must be defined", vnam(SECTION));
328			error(USER, errmsg);
329			}
330			if (vdef(SECTION) > 1) {
331			sprintf(errmsg, "ignoring all but first %s", vnam(SECTION));
332			error(WARNING, errmsg);
333			}
334			if (!vdef(OCTREE)) {
335			if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
336			error(SYSTEM, "out of memory");
337			sprintf(vval(OCTREE), "%s.oct", froot);
338			vdef(OCTREE)++;
339	gregl	3.14	}
340			if (!vdef(VDIST)) {
341			vval(VDIST) = "F";
342			vdef(VDIST)++;
343	gregl	3.1	}
344			if (!vdef(OCCUPANCY)) {
345			vval(OCCUPANCY) = "U";
346			vdef(OCCUPANCY)++;
347			}
348			/* append rendering options */
349			if (vdef(RENDER))
350			rtargc += wordstring(rtargv+rtargc, vval(RENDER));
351	gregl	3.15
352			if (gp == NULL) /* already initialized? */
353			return;
354			/* set grid parameters */
355	gregl	3.16	gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
356	gregl	3.15	if (sscanf(vval(SECTION),
357	gregl	3.16	"%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
358	gregl	3.15	&gp->orig[0], &gp->orig[1], &gp->orig[2],
359			&gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
360			&gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
361	gregl	3.16	&gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
362			&gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
363	gregl	3.15	badvalue(SECTION);
364			maxlen = 0.;
365			for (i = 0; i < 3; i++)
366			if ((len[i] = VLEN(gp->xv[i])) > maxlen)
367			maxlen = len[i];
368			if (!vdef(GRID)) {
369			sprintf(buf, "%.4f", maxlen/8.);
370			vval(GRID) = savqstr(buf);
371			vdef(GRID)++;
372			}
373			if ((d = vflt(GRID)) <= FTINY)
374			badvalue(GRID);
375			for (i = 0; i < 3; i++)
376	gregl	3.16	if (gp->grid[i] <= 0)
377			gp->grid[i] = len[i]/d + (1.-FTINY);
378	gregl	3.1	}
379
380
381			creatholo(gp) /* create a holodeck output file */
382			HDGRID *gp;
383			{
384	gregl	3.12	extern char VersionID[];
385	gregl	3.1	long endloc = 0;
386	gregl	3.10	int fd;
387	gregl	3.1	FILE *fp;
388			/* open & truncate file */
389			if ((fp = fopen(hdkfile, "w+")) == NULL) {
390			sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
391			error(SYSTEM, errmsg);
392			}
393			/* write information header */
394			newheader("RADIANCE", fp);
395	gregl	3.12	fprintf(fp, "SOFTWARE= %s\n", VersionID);
396	gregl	3.1	printvars(fp);
397			fputformat(HOLOFMT, fp);
398			fputc('\n', fp);
399			putw(HOLOMAGIC, fp); /* put magic number & terminus */
400			fwrite(&endloc, sizeof(long), 1, fp);
401	gregl	3.10	fd = dup(fileno(fp));
402			fclose(fp); /* flush and close stdio stream */
403			hdinit(fd, gp); /* allocate and initialize index */
404	gregl	3.1	}
405
406
407			headline(s) /* process information header line */
408			char *s;
409			{
410			extern char FMTSTR[];
411			register char *cp;
412			char fmt[32];
413
414	gregl	3.2	if (formatval(fmt, s)) {
415	gregl	3.1	if (strcmp(fmt, HOLOFMT)) {
416			sprintf(errmsg, "%s file \"%s\" has %s%s",
417			HOLOFMT, hdkfile, FMTSTR, fmt);
418			error(USER, errmsg);
419			}
420			return;
421			}
422			for (cp = s; cp; cp++) / take off any comments */
423			if (*cp == '#') {
424			*cp = '\0';
425			break;
426			}
427			setvariable(s, matchvar); /* don't flag errors */
428			}
429
430
431			loadholo() /* start loading a holodeck from fname */
432			{
433	gregl	3.10	extern long ftell();
434	gregl	3.1	FILE *fp;
435	gregl	3.10	int fd;
436			long fpos;
437	gregl	3.4	/* open holodeck file */
438			if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
439			sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
440			ncprocs>0 ? "appending" : "reading");
441	gregl	3.1	error(SYSTEM, errmsg);
442			}
443			/* load variables from header */
444			getheader(fp, headline, NULL);
445			/* check magic number */
446			if (getw(fp) != HOLOMAGIC) {
447			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
448			hdkfile);
449			error(USER, errmsg);
450			}
451	gregl	3.10	fread(&fpos, sizeof(long), 1, fp);
452			if (fpos != 0)
453	gregl	3.1	error(WARNING, "ignoring multiple sections in holodeck file");
454	gregl	3.10	fpos = ftell(fp); /* get stdio position */
455			fd = dup(fileno(fp));
456			fclose(fp); /* done with stdio */
457			lseek(fd, fpos, 0); /* align system file pointer */
458			hdinit(fd, NULL); /* allocate and load index */
459	gregl	3.1	}
460
461
462			done_packets(pl) /* handle finished packets */
463			PACKET *pl;
464			{
465	gregl	3.13	static int n2flush = 0;
466	gregl	3.1	register PACKET *p;
467
468			while (pl != NULL) {
469			p = pl; pl = p->next; p->next = NULL;
470			if (p->nr > 0) { /* add to holodeck */
471			bcopy((char *)p->ra,
472			(char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
473			p->nr*sizeof(RAYVAL));
474			if (outdev != NULL) /* display it */
475	gregl	3.7	disp_packet((PACKHEAD *)p);
476	gregl	3.13	if (hdcachesize <= 0) /* manual flushing */
477			n2flush += p->nr;
478	gregl	3.6	nraysdone += p->nr;
479			npacksdone++;
480	gregl	3.1	}
481			p->nr = 0; /* push onto free list */
482			p->next = freepacks;
483			freepacks = p;
484	gregl	3.5	}
485	gregl	3.19	if (n2flush > 512RPACKSIZnprocs) {
486	gregl	3.5	hdflush(NULL); /* flush holodeck buffers */
487	gregl	3.13	n2flush = 0;
488	gregl	3.1	}
489			}
490
491
492			rootname(rn, fn) /* remove tail from end of fn */
493			register char rn, fn;
494			{
495			char tp, dp;
496
497			for (tp = NULL, dp = rn; rn = fn++; rn++)
498	gregl	3.22	if (*rn == '/')
499	gregl	3.1	dp = rn;
500			else if (*rn == '.')
501			tp = rn;
502			if (tp != NULL && tp > dp)
503			*tp = '\0';
504			}
505
506
507			badvalue(vc) /* report bad variable value and exit */
508			int vc;
509			{
510			sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
511			error(USER, errmsg);
512			}
513
514
515			eputs(s) /* put error message to stderr */
516			register char *s;
517			{
518			static int midline = 0;
519
520			if (!*s)
521			return;
522			if (!midline++) { /* prepend line with program name */
523			fputs(progname, stderr);
524			fputs(": ", stderr);
525			}
526			fputs(s, stderr);
527			if (s[strlen(s)-1] == '\n') {
528			fflush(stderr);
529			midline = 0;
530			}
531			}
532
533
534			wputs(s) /* put warning string to stderr */
535			char *s;
536			{
537			if (!nowarn)
538			eputs(s);
539			}
540
541
542			quit(ec) /* exit program gracefully */
543			int ec;
544			{
545			int status = 0;
546
547	gregl	3.24	if (hdlist[0] != NULL) { /* close holodeck */
548	gregl	3.21	if (nprocs > 0)
549	gregl	3.24	status = done_rtrace(); /* calls hdsync() */
550	gregl	3.19	if (ncprocs > 0 && vdef(REPORT)) {
551			long fsiz, fuse;
552			fsiz = hdfilen(hdlist[0]->fd);
553			fuse = hdfiluse(hdlist[0]->fd, 1);
554			fprintf(stderr,
555	gregl	3.3	"%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
556	gregl	3.19	hdkfile, fsiz/(1024.*1024.),
557			100.*(fsiz-fuse)/fsiz);
558			}
559	gregl	3.1	}
560	gregl	3.12	if (orig_mode >= 0) /* reset holodeck access mode */
561			fchmod(hdlist[0]->fd, orig_mode);
562	gregl	3.11	if (outdev != NULL) /* close display */
563			disp_close();
564	gregl	3.1	exit(ec ? ec : status); /* exit */
565			}