src/hd/rhdisp.c

/* Copyright (c) 1999 Silicon Graphics, Inc. */

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

/*
 * Holodeck display process.
 */

#include "rholo.h"
#include "rhdisp.h"
#include "rhdriver.h"
#include "selcall.h"
#include <ctype.h>

#ifndef VIEWHISTLEN
#define VIEWHISTLEN     4       /* number of remembered views */
#endif

#ifndef FSIZDEF
#define FSIZDEF         0.125   /* default focus frame size */
#endif

HOLO    *hdlist[HDMAX+1];       /* global holodeck list */

char    *hdgfn[HDMAX];          /* holodeck section geometry list */
char    *hdpfn[HDMAX];          /* section portal list */

char    cmdlist[DC_NCMDS][8] = DC_INIT;

int     imm_mode = 0;           /* bundles are being delivered immediately */

int     do_outside = 0;         /* render from outside sections */

double  eyesepdist = 1;         /* eye separation distance */

char    *progname;              /* global argv[0] */

FILE    *sstdin, *sstdout;      /* server's standard input and output */

#ifdef DEBUG
extern time_t   time();
static time_t   tmodesw;
static time_t   timm, tadd;
static long     nimmrays, naddrays;
#endif

#define RDY_SRV         01
#define RDY_DEV         02
#define RDY_SIN         04


main(argc, argv)
int     argc;
char    *argv[];
{
        extern int      eputs();
        int     rdy, inp, res = 0, pause = 0;

        progname = argv[0];
        if (argc < 3)
                error(USER, "bad command line arguments");
                                        /* open our device */
        dev_open(argv[1]);
                                        /* open server process i/o */
        sstdout = fdopen(atoi(argv[2]), "w");
        if (argc < 4 || (inp = atoi(argv[3])) < 0)
                sstdin = NULL;
        else
                sstdin = fdopen(inp, "r");
                                        /* set command error vector */
        erract[COMMAND].pf = eputs;
#ifdef DEBUG
        tmodesw = time(NULL);
#endif
                                        /* enter main loop */
        do {
                rdy = disp_wait();
                if (rdy & RDY_SRV) {            /* process server result */
                        res = serv_result();
                        if (pause && res != DS_SHUTDOWN) {
                                serv_request(DR_ATTEN, 0, NULL);
                                while ((res = serv_result()) != DS_ACKNOW &&
                                                res != DS_SHUTDOWN)
                                        ;
                        }
                }
                if (rdy & RDY_DEV) {            /* user input from driver */
                        inp = dev_input();
                        if (inp & DFL(DC_SETVIEW))
                                new_view(&odev.v);
                        else if (inp & DFL(DC_LASTVIEW))
                                new_view(NULL);
                        if (inp & DFL(DC_REDRAW))
                                imm_mode = beam_sync(1) > 0;
                        if (inp & DFL(DC_GETVIEW))
                                printview();
                        if (inp & DFL(DC_FOCUS))
                                set_focus(odev_args);
                        if (inp & DFL(DC_KILL)) {
                                serv_request(DR_KILL, 0, NULL);
                                pause = 0;
                        }
                        if (inp & DFL(DC_CLOBBER))
                                serv_request(DR_CLOBBER, 0, NULL);
                        if (inp & DFL(DC_RESTART)) {
                                serv_request(DR_RESTART, 0, NULL);
                                pause = 0;
                        }
                        if (inp & DFL(DC_RESUME)) {
                                serv_request(DR_NOOP, 0, NULL);
                                pause = 0;
                        }
                        if (inp & DFL(DC_PAUSE))
                                pause = 1;
                        if (inp & DFL(DC_QUIT))
                                serv_request(DR_SHUTDOWN, 0, NULL);
                }
                if (rdy & RDY_SIN && !imm_mode) /* user input from sstdin */
                        switch (usr_input()) {
                        case DC_PAUSE:
                                pause = 1;
                                break;
                        case DC_RESUME:
                                serv_request(DR_NOOP, 0, NULL);
                                /* fall through */
                        case DC_KILL:
                        case DC_RESTART:
                                pause = 0;
                                break;
                        }
        } while (res != DS_SHUTDOWN);
#ifdef DEBUG
        if (timm && nimmrays)
                fprintf(stderr,
                        "%s: %.1f rays recalled/second (%ld rays total)\n",
                                progname, (double)nimmrays/timm, nimmrays);
        if (tadd && naddrays)
                fprintf(stderr,
                        "%s: %.1f rays calculated/second (%ld rays total)\n",
                                progname, (double)naddrays/tadd, naddrays);
#endif
                                        /* all done */
        quit(0);
}


int
disp_wait()                     /* wait for more input */
{
        fd_set  readset, errset;
        int     flgs;
        int     n;
        register int    i;
                                /* see if we can avoid select call */
        if (hdlist[0] == NULL)
                return(RDY_SRV);        /* initialize first */
        flgs = 0;               /* flag what's ready already */
        if (imm_mode || stdin->_cnt > 0)
                flgs |= RDY_SRV;
        if (sstdin != NULL && sstdin->_cnt > 0)
                flgs |= RDY_SIN;
        if (odev.inpready)
                flgs |= RDY_DEV;
        if (flgs)               /* got something? */
                return(flgs);
        if (dev_flush())        /* else flush output & check keyboard+mouse */
                return(RDY_DEV);
                                /* if nothing, we need to call select */
        FD_ZERO(&readset); FD_ZERO(&errset);
        FD_SET(0, &readset);
        FD_SET(0, &errset);
        FD_SET(odev.ifd, &readset);
        FD_SET(odev.ifd, &errset);
        n = odev.ifd+1;
        if (sstdin != NULL) {
                FD_SET(fileno(sstdin), &readset);
                FD_SET(fileno(sstdin), &errset);
                if (fileno(sstdin) >= n)
                        n = fileno(sstdin) + 1;
        }
        n = select(n, &readset, NULL, &errset, NULL);
        if (n < 0) {
                if (errno == EINTR)
                        return(0);
                error(SYSTEM, "select call failure in disp_wait");
        }
        if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset))
                flgs |= RDY_SRV;
        if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset))
                flgs |= RDY_DEV;
        if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) ||
                                FD_ISSET(fileno(sstdin), &errset)))
                flgs |= RDY_SIN;
        return(flgs);
}


add_holo(hdg, gfn, pfn)         /* register a new holodeck section */
HDGRID  *hdg;
char    *gfn, *pfn;
{
        VIEW    nv;
        double  d;
        register int    hd;

        for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++)
                ;
        if (hd >= HDMAX)
                error(INTERNAL, "too many holodeck sections in add_holo");
        hdlist[hd] = (HOLO *)malloc(sizeof(HOLO));
        if (hdlist[hd] == NULL)
                error(SYSTEM, "out of memory in add_holo");
        bcopy((char *)hdg, (char *)hdlist[hd], sizeof(HDGRID));
        hdcompgrid(hdlist[hd]);
        hdgfn[hd] = savestr(gfn);
        hdpfn[hd] = pfn && *pfn ? savestr(pfn) : (char *)NULL;
        if (hd)
                return;
                                        /* set initial viewpoint */
        copystruct(&nv, &odev.v);
        VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5);
        VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5);
        VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5);
        fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]);
        VCOPY(nv.vup, hdlist[0]->xv[2]);
        if (do_outside) {
                normalize(nv.vdir);
                d = VLEN(hdlist[0]->xv[1]);
                d += VLEN(hdlist[0]->xv[2]);
                VSUM(nv.vp, nv.vp, nv.vdir, -d);
        }
        new_view(&nv);
}


disp_bundle(p)                  /* display a ray bundle */
register PACKHEAD       *p;
{
        GCOORD  gc[2];
        FVECT   ro, rd, wp;
        double  d;
        register int    i;
                                        /* get beam coordinates */
        if (p->hd < 0 | p->hd >= HDMAX || hdlist[p->hd] == NULL)
                error(INTERNAL, "bad holodeck number in disp_bundle");
        if (!hdbcoord(gc, hdlist[p->hd], p->bi))
                error(INTERNAL, "bad beam index in disp_bundle");
                                        /* display each ray */
        for (i = p->nr; i--; ) {
                hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r);
                d = hddepth(hdlist[p->hd], packra(p)[i].d);
                if (d < .99*FHUGE) {
                        VSUM(wp, ro, rd, d);    /* might be behind viewpoint */
                        dev_value(packra(p)[i].v, rd, wp);
                } else
                        dev_value(packra(p)[i].v, rd, NULL);
        }
#ifdef DEBUG
        if (imm_mode) nimmrays += p->nr;
        else naddrays += p->nr;
#endif
}


new_view(v)                     /* change view parameters */
register VIEW   *v;
{
        static VIEW     viewhist[VIEWHISTLEN];
        static unsigned nhist;
        VIEW    *dv;
        int     i, res[2];
        int2    *slist;
        char    *err;
                                /* restore previous view? */
        if (v == NULL) {
                if (nhist > 1)          /* get one before last setting */
                        nhist--;
                else                    /* else go to end of list */
                        while (nhist < VIEWHISTLEN && viewhist[nhist].type)
                                nhist++;
                v = viewhist + ((nhist-1)%VIEWHISTLEN);
        } else
again:
        if ((err = setview(v)) != NULL) {
                error(COMMAND, err);
                return;
        }
        if (!dev_view(v))       /* notify display driver */
                goto again;
        if (v->type == VT_PAR) {
                error(COMMAND, "cannot handle parallel views");
                return;
        }
        beam_init(odev.firstuse);       /* compute new beam set */
        for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) {
                if ((slist = beam_view(dv, res[0], res[1])) == NULL) {
                        if (!nhist) {
                                error(COMMAND, "invalid starting view");
                                return;
                        }
                        copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN));
                        goto again;     /* poss. overloading dev_section()? */
                }
                DCHECK(*slist < 0, WARNING, "no visible sections in new_view");
                for ( ; *slist >= 0; slist++)
                        dev_section(hdgfn[*slist], hdpfn[*slist]);
        }
        dev_section(NULL,NULL); /* end section list */
        dev_flush();            /* update display */
                                /* update server */
        imm_mode = beam_sync(odev.firstuse) > 0;
                                /* record new view */
        if (v < viewhist || v >= viewhist+VIEWHISTLEN) {
                copystruct(viewhist + (nhist%VIEWHISTLEN), v);
                nhist++;
        }
}


set_focus(args)                 /* set focus frame */
char    *args;
{
        double  hcent, vcent, hsiz, vsiz;
        VIEW    *dv, vwfocus;
        int     i, res[2];

        i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz);
        if (i < 2 || hcent < 0 || hcent > 1 || vcent < 0 || vcent > 1) {
                beam_init(0);                           /* restore view */
                for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
                        beam_view(dv, res[0], res[1]);
                beam_sync(0);                           /* update server */
                return;
        }
        if (i < 4 || hsiz <= hcent || hsiz > 1 || vsiz <= vcent || vsiz > 1)
                hsiz = vsiz = FSIZDEF;                  /* gave center only */
        else {
                hsiz -= hcent; hcent += 0.5*hsiz;       /* gave min and max */
                vsiz -= vcent; vcent += 0.5*vsiz;
        }
        beam_init(0);                                   /* add basic views */
        for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
                beam_view(dv, res[0]>>4, res[1]>>4);
        copystruct(&vwfocus, &odev.v);                  /* add focus view */
        switch (odev.v.type) {
        case VT_PER:
                vwfocus.horiz = 2.*180./PI*atan(
                                hsiz * tan(PI/180./2.*odev.v.horiz) );
                vwfocus.vert = 2.*180./PI*atan(
                                vsiz * tan(PI/180./2.*odev.v.vert) );
                break;
        case VT_PAR:
        case VT_ANG:
                vwfocus.horiz = hsiz * odev.v.horiz;
                vwfocus.vert = vsiz * odev.v.vert;
                break;
        case VT_HEM:
                vwfocus.horiz = 2.*180./PI*asin(
                                hsiz * sin(PI/180./2.*odev.v.horiz) );
                vwfocus.vert = 2.*180./PI*asin(
                                vsiz * sin(PI/180./2.*odev.v.vert) );
                break;
        case VT_CYL:
                vwfocus.horiz = hsiz * odev.v.horiz;
                vwfocus.vert = 2.*180./PI*atan(
                                vsiz * tan(PI/180./2.*odev.v.vert) );
                break;
        default:
                error(INTERNAL, "bad view type in set_focus");
        }
        vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz;
        vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz;
        setview(&vwfocus);
        beam_view(&vwfocus, (int)(3*odev.hres*hsiz)+100,
                        (int)(3*odev.vres*vsiz)+100);
        beam_sync(0);                                   /* update server */
}


int
usr_input()                     /* get user input and process it */
{
        VIEW    vparams;
        char    cmd[256];
        register char   *args;
        register int    i;

        if (fgets(cmd, sizeof(cmd), sstdin) == NULL) {
                fclose(sstdin);
                sstdin = NULL;
                return(-1);
        }
        if (*cmd == '\n')
                return(DC_RESUME);
        for (args = cmd; *args && !isspace(*args); args++)
                ;
        while (isspace(*args))
                *args++ = '\0';
        if (*args && args[i=strlen(args)-1] == '\n')
                args[i] = '\0';
        for (i = 0; i < DC_NCMDS; i++)
                if (!strcmp(cmd, cmdlist[i]))
                        break;
        if (i >= DC_NCMDS) {
                dev_auxcom(cmd, args);
                return(-1);
        }
        switch (i) {
        case DC_SETVIEW:                /* set the view */
                copystruct(&vparams, &odev.v);
                if (!sscanview(&vparams, args))
                        error(COMMAND, "missing view options");
                else
                        new_view(&vparams);
                break;
        case DC_GETVIEW:                /* print the current view */
                printview();
                break;
        case DC_LASTVIEW:               /* restore previous view */
                new_view(NULL);
                break;
        case DC_FOCUS:                  /* set focus frame */
                set_focus(args);
                break;
        case DC_PAUSE:                  /* pause the current calculation */
        case DC_RESUME:                 /* resume the calculation */
                /* handled in main() */
                break;
        case DC_REDRAW:                 /* redraw from server */
                imm_mode = beam_sync(1) > 0;
                dev_clear();
                break;
        case DC_KILL:                   /* kill rtrace process(es) */
                serv_request(DR_KILL, 0, NULL);
                break;
        case DC_CLOBBER:                /* clobber holodeck */
                serv_request(DR_CLOBBER, 0, NULL);
                break;
        case DC_RESTART:                /* restart rtrace */
                serv_request(DR_RESTART, 0, NULL);
                break;
        case DC_QUIT:                   /* quit request */
                serv_request(DR_SHUTDOWN, 0, NULL);
                break;
        default:
                error(CONSISTENCY, "bad command id in usr_input");
        }
        return(i);
}


printview()                     /* print our current view to server stdout */
{
        fputs(VIEWSTR, sstdout);
        fprintview(&odev.v, sstdout);
        fputc('\n', sstdout);
        fflush(sstdout);
}


int
serv_result()                   /* get next server result and process it */
{
        static char     *buf = NULL;
        static int      bufsiz = 0;
        MSGHEAD msg;
        int     n;
                                        /* read message header */
        if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1)
                goto readerr;
        if (msg.nbytes > 0) {           /* get the message body */
                if (msg.nbytes > bufsiz) {
                        if (buf == NULL)
                                buf = (char *)malloc(bufsiz=msg.nbytes);
                        else
                                buf = (char *)realloc(buf, bufsiz=msg.nbytes);
                        if (buf == NULL)
                                error(SYSTEM, "out of memory in serv_result");
                }
                if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes)
                        goto readerr;
        }
        switch (msg.type) {             /* process results */
        case DS_BUNDLE:
                if (msg.nbytes < sizeof(PACKHEAD) ||
                                msg.nbytes != packsiz(((PACKHEAD *)buf)->nr))
                        error(INTERNAL, "bad display packet from server");
                disp_bundle((PACKHEAD *)buf);
                break;
        case DS_ADDHOLO:
                if (msg.nbytes < sizeof(HDGRID)+2)
                        error(INTERNAL, "bad holodeck record from server");
                add_holo((HDGRID *)buf, buf+sizeof(HDGRID),
                        buf+sizeof(HDGRID)+strlen(buf+sizeof(HDGRID))+1);
                break;
        case DS_OUTSECT:
                do_outside = 1;
                goto noargs;
        case DS_EYESEP:
                if (msg.nbytes <= 1 || (eyesepdist = atof(buf)) <= FTINY)
                        error(INTERNAL, "bad eye separation from server");
                break;
        case DS_STARTIMM:
        case DS_ENDIMM:
                if (!(imm_mode = msg.type==DS_STARTIMM))
                        dev_flush();
#ifdef DEBUG
                {
                        time_t  tnow = time(NULL);
                        if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw;
                        else timm += tnow - tmodesw;
                        tmodesw = tnow;
                }
#endif
                goto noargs;
        case DS_ACKNOW:
        case DS_SHUTDOWN:
                goto noargs;
        default:
                error(INTERNAL, "unrecognized result from server process");
        }
        return(msg.type);               /* return message type */
noargs:
        if (msg.nbytes) {
                sprintf(errmsg, "unexpected body with server message %d",
                                msg.type);
                error(INTERNAL, errmsg);
        }
        return(msg.type);
readerr:
        if (feof(stdin))
                error(SYSTEM, "server process died");
        error(SYSTEM, "error reading from server process");
}


serv_request(type, nbytes, p)   /* send a request to the server process */
int     type, nbytes;
char    *p;
{
        MSGHEAD msg;
        int     m;
                                /* consistency checks */
        DCHECK(nbytes < 0 || nbytes > 0 & p == NULL,
                        CONSISTENCY, "bad buffer handed to serv_request");
                                /* get server's attention for big request */
        if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) {
                serv_request(DR_ATTEN, 0, NULL);
                while ((m = serv_result()) != DS_ACKNOW)
                        if (m == DS_SHUTDOWN)   /* the bugger quit on us */
                                quit(0);
        }
        msg.type = type;        /* write and flush the message */
        msg.nbytes = nbytes;
        fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout);
        if (nbytes > 0)
                fwrite(p, 1, nbytes, stdout);
        if (fflush(stdout) < 0)
                error(SYSTEM, "write error in serv_request");
}


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;
        }
}


quit(code)                      /* clean up and exit */
int     code;
{
        if (code)
                exit(code);
        if (odev.v.type)
                dev_close();
        exit(0);
}
Revision:	3.41
Committed:	Mon Mar 8 17:31:49 1999 UTC (25 years, 1 month ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 3.40:	+1 -2 lines
Log Message:	removed unnecessary inclusion of sys/types.h
#	User	Rev	Content
1	gwlarson	3.41	/* Copyright (c) 1999 Silicon Graphics, Inc. */
2	gregl	3.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ SGI";
5			#endif
6
7			/*
8			* Holodeck display process.
9			*/
10
11			#include "rholo.h"
12			#include "rhdisp.h"
13			#include "rhdriver.h"
14			#include "selcall.h"
15	gregl	3.10	#include <ctype.h>
16	gregl	3.1
17	gregl	3.12	#ifndef VIEWHISTLEN
18	gregl	3.16	#define VIEWHISTLEN 4 /* number of remembered views */
19	gregl	3.12	#endif
20
21	gwlarson	3.36	#ifndef FSIZDEF
22			#define FSIZDEF 0.125 /* default focus frame size */
23			#endif
24
25	gregl	3.1	HOLO hdlist[HDMAX+1]; / global holodeck list */
26
27	gwlarson	3.38	char hdgfn[HDMAX]; / holodeck section geometry list */
28			char hdpfn[HDMAX]; / section portal list */
29	gwlarson	3.37
30	gregl	3.10	char cmdlist[DC_NCMDS][8] = DC_INIT;
31
32	gregl	3.1	int imm_mode = 0; /* bundles are being delivered immediately */
33
34	gregl	3.20	int do_outside = 0; /* render from outside sections */
35
36	gwlarson	3.25	double eyesepdist = 1; /* eye separation distance */
37
38	gregl	3.1	char progname; / global argv[0] */
39
40	gregl	3.10	FILE sstdin, sstdout; /* server's standard input and output */
41	gregl	3.1
42	gregl	3.21	#ifdef DEBUG
43			extern time_t time();
44			static time_t tmodesw;
45			static time_t timm, tadd;
46			static long nimmrays, naddrays;
47			#endif
48
49	gregl	3.10	#define RDY_SRV 01
50			#define RDY_DEV 02
51			#define RDY_SIN 04
52	gregl	3.1
53	gregl	3.10
54	gregl	3.1	main(argc, argv)
55			int argc;
56			char *argv[];
57			{
58	gregl	3.10	extern int eputs();
59	gregl	3.3	int rdy, inp, res = 0, pause = 0;
60	gregl	3.1
61			progname = argv[0];
62	gregl	3.10	if (argc < 3)
63	gregl	3.1	error(USER, "bad command line arguments");
64			/* open our device */
65			dev_open(argv[1]);
66	gregl	3.10	/* open server process i/o */
67			sstdout = fdopen(atoi(argv[2]), "w");
68			if (argc < 4 \|\| (inp = atoi(argv[3])) < 0)
69			sstdin = NULL;
70			else
71			sstdin = fdopen(inp, "r");
72			/* set command error vector */
73			erract[COMMAND].pf = eputs;
74	gregl	3.21	#ifdef DEBUG
75			tmodesw = time(NULL);
76			#endif
77	gregl	3.1	/* enter main loop */
78			do {
79			rdy = disp_wait();
80	gregl	3.19	if (rdy & RDY_SRV) { /* process server result */
81			res = serv_result();
82			if (pause && res != DS_SHUTDOWN) {
83			serv_request(DR_ATTEN, 0, NULL);
84			while ((res = serv_result()) != DS_ACKNOW &&
85			res != DS_SHUTDOWN)
86			;
87			}
88			}
89	gregl	3.10	if (rdy & RDY_DEV) { /* user input from driver */
90	gregl	3.3	inp = dev_input();
91	gregl	3.13	if (inp & DFL(DC_SETVIEW))
92			new_view(&odev.v);
93	gwlarson	3.37	else if (inp & DFL(DC_LASTVIEW))
94			new_view(NULL);
95			if (inp & DFL(DC_REDRAW))
96			imm_mode = beam_sync(1) > 0;
97	gregl	3.13	if (inp & DFL(DC_GETVIEW))
98	gregl	3.10	printview();
99	gwlarson	3.36	if (inp & DFL(DC_FOCUS))
100			set_focus(odev_args);
101	gregl	3.15	if (inp & DFL(DC_KILL)) {
102	gregl	3.14	serv_request(DR_KILL, 0, NULL);
103	gregl	3.15	pause = 0;
104			}
105	gregl	3.14	if (inp & DFL(DC_CLOBBER))
106			serv_request(DR_CLOBBER, 0, NULL);
107	gregl	3.15	if (inp & DFL(DC_RESTART)) {
108	gregl	3.14	serv_request(DR_RESTART, 0, NULL);
109	gregl	3.15	pause = 0;
110			}
111	gwlarson	3.32	if (inp & DFL(DC_RESUME)) {
112			serv_request(DR_NOOP, 0, NULL);
113			pause = 0;
114			}
115			if (inp & DFL(DC_PAUSE))
116			pause = 1;
117	gregl	3.13	if (inp & DFL(DC_QUIT))
118			serv_request(DR_SHUTDOWN, 0, NULL);
119	gregl	3.3	}
120	gwlarson	3.34	if (rdy & RDY_SIN && !imm_mode) /* user input from sstdin */
121	gregl	3.10	switch (usr_input()) {
122			case DC_PAUSE:
123			pause = 1;
124			break;
125			case DC_RESUME:
126			serv_request(DR_NOOP, 0, NULL);
127	gregl	3.15	/* fall through */
128			case DC_KILL:
129			case DC_RESTART:
130	gregl	3.10	pause = 0;
131			break;
132			}
133	gregl	3.1	} while (res != DS_SHUTDOWN);
134	gregl	3.21	#ifdef DEBUG
135			if (timm && nimmrays)
136			fprintf(stderr,
137			"%s: %.1f rays recalled/second (%ld rays total)\n",
138			progname, (double)nimmrays/timm, nimmrays);
139			if (tadd && naddrays)
140			fprintf(stderr,
141			"%s: %.1f rays calculated/second (%ld rays total)\n",
142			progname, (double)naddrays/tadd, naddrays);
143			#endif
144	gregl	3.1	/* all done */
145			quit(0);
146			}
147
148
149			int
150			disp_wait() /* wait for more input */
151			{
152			fd_set readset, errset;
153			int flgs;
154			int n;
155			register int i;
156			/* see if we can avoid select call */
157	gwlarson	3.40	if (hdlist[0] == NULL)
158			return(RDY_SRV); /* initialize first */
159	gwlarson	3.30	flgs = 0; /* flag what's ready already */
160	gregl	3.1	if (imm_mode \|\| stdin->_cnt > 0)
161	gwlarson	3.30	flgs \|= RDY_SRV;
162	gregl	3.10	if (sstdin != NULL && sstdin->_cnt > 0)
163	gwlarson	3.30	flgs \|= RDY_SIN;
164			if (odev.inpready)
165			flgs \|= RDY_DEV;
166			if (flgs) /* got something? */
167			return(flgs);
168			if (dev_flush()) /* else flush output & check keyboard+mouse */
169	gregl	3.4	return(RDY_DEV);
170	gwlarson	3.30	/* if nothing, we need to call select */
171	gregl	3.1	FD_ZERO(&readset); FD_ZERO(&errset);
172			FD_SET(0, &readset);
173			FD_SET(0, &errset);
174			FD_SET(odev.ifd, &readset);
175			FD_SET(odev.ifd, &errset);
176	gregl	3.10	n = odev.ifd+1;
177			if (sstdin != NULL) {
178			FD_SET(fileno(sstdin), &readset);
179	gregl	3.23	FD_SET(fileno(sstdin), &errset);
180	gregl	3.10	if (fileno(sstdin) >= n)
181			n = fileno(sstdin) + 1;
182			}
183	gregl	3.1	n = select(n, &readset, NULL, &errset, NULL);
184			if (n < 0) {
185			if (errno == EINTR)
186			return(0);
187			error(SYSTEM, "select call failure in disp_wait");
188			}
189			if (FD_ISSET(0, &readset) \|\| FD_ISSET(0, &errset))
190	gregl	3.4	flgs \|= RDY_SRV;
191	gregl	3.1	if (FD_ISSET(odev.ifd, &readset) \|\| FD_ISSET(odev.ifd, &errset))
192	gregl	3.4	flgs \|= RDY_DEV;
193	gregl	3.23	if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) \|\|
194			FD_ISSET(fileno(sstdin), &errset)))
195	gregl	3.10	flgs \|= RDY_SIN;
196	gregl	3.1	return(flgs);
197			}
198
199
200	gwlarson	3.38	add_holo(hdg, gfn, pfn) /* register a new holodeck section */
201	gregl	3.1	HDGRID *hdg;
202	gwlarson	3.38	char gfn, pfn;
203	gregl	3.1	{
204			VIEW nv;
205	gregl	3.20	double d;
206	gregl	3.1	register int hd;
207
208			for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++)
209			;
210			if (hd >= HDMAX)
211			error(INTERNAL, "too many holodeck sections in add_holo");
212			hdlist[hd] = (HOLO *)malloc(sizeof(HOLO));
213			if (hdlist[hd] == NULL)
214			error(SYSTEM, "out of memory in add_holo");
215			bcopy((char )hdg, (char )hdlist[hd], sizeof(HDGRID));
216			hdcompgrid(hdlist[hd]);
217	gwlarson	3.38	hdgfn[hd] = savestr(gfn);
218			hdpfn[hd] = pfn && pfn ? savestr(pfn) : (char )NULL;
219	gregl	3.1	if (hd)
220			return;
221			/* set initial viewpoint */
222			copystruct(&nv, &odev.v);
223			VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5);
224			VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5);
225			VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5);
226			fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]);
227			VCOPY(nv.vup, hdlist[0]->xv[2]);
228	gregl	3.20	if (do_outside) {
229			normalize(nv.vdir);
230			d = VLEN(hdlist[0]->xv[1]);
231			d += VLEN(hdlist[0]->xv[2]);
232			VSUM(nv.vp, nv.vp, nv.vdir, -d);
233			}
234	gregl	3.1	new_view(&nv);
235			}
236
237
238			disp_bundle(p) /* display a ray bundle */
239			register PACKHEAD *p;
240			{
241			GCOORD gc[2];
242			FVECT ro, rd, wp;
243			double d;
244			register int i;
245			/* get beam coordinates */
246			if (p->hd < 0 \| p->hd >= HDMAX \|\| hdlist[p->hd] == NULL)
247			error(INTERNAL, "bad holodeck number in disp_bundle");
248			if (!hdbcoord(gc, hdlist[p->hd], p->bi))
249			error(INTERNAL, "bad beam index in disp_bundle");
250			/* display each ray */
251			for (i = p->nr; i--; ) {
252			hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r);
253			d = hddepth(hdlist[p->hd], packra(p)[i].d);
254	gwlarson	3.29	if (d < .99*FHUGE) {
255			VSUM(wp, ro, rd, d); /* might be behind viewpoint */
256			dev_value(packra(p)[i].v, rd, wp);
257			} else
258			dev_value(packra(p)[i].v, rd, NULL);
259	gregl	3.1	}
260	gregl	3.21	#ifdef DEBUG
261			if (imm_mode) nimmrays += p->nr;
262			else naddrays += p->nr;
263			#endif
264	gregl	3.1	}
265
266
267			new_view(v) /* change view parameters */
268	gregl	3.12	register VIEW *v;
269	gregl	3.1	{
270	gregl	3.12	static VIEW viewhist[VIEWHISTLEN];
271			static unsigned nhist;
272	gwlarson	3.24	VIEW *dv;
273	gwlarson	3.40	int i, res[2];
274			int2 *slist;
275	gregl	3.1	char *err;
276	gregl	3.12	/* restore previous view? */
277			if (v == NULL) {
278	gregl	3.16	if (nhist > 1) /* get one before last setting */
279			nhist--;
280			else /* else go to end of list */
281			while (nhist < VIEWHISTLEN && viewhist[nhist].type)
282			nhist++;
283	gregl	3.12	v = viewhist + ((nhist-1)%VIEWHISTLEN);
284	gregl	3.17	} else
285			again:
286			if ((err = setview(v)) != NULL) {
287	gregl	3.12	error(COMMAND, err);
288			return;
289			}
290	gwlarson	3.37	if (!dev_view(v)) /* notify display driver */
291			goto again;
292	gregl	3.12	if (v->type == VT_PAR) {
293			error(COMMAND, "cannot handle parallel views");
294			return;
295			}
296	gwlarson	3.37	beam_init(odev.firstuse); /* compute new beam set */
297			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) {
298			if ((slist = beam_view(dv, res[0], res[1])) == NULL) {
299	gwlarson	3.24	if (!nhist) {
300			error(COMMAND, "invalid starting view");
301			return;
302			}
303			copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN));
304	gwlarson	3.37	goto again; /* poss. overloading dev_section()? */
305			}
306			DCHECK(*slist < 0, WARNING, "no visible sections in new_view");
307	gwlarson	3.38	for ( ; *slist >= 0; slist++)
308			dev_section(hdgfn[slist], hdpfn[slist]);
309	gwlarson	3.37	}
310	gwlarson	3.38	dev_section(NULL,NULL); /* end section list */
311	gwlarson	3.37	dev_flush(); /* update display */
312	gwlarson	3.34	/* update server */
313	gwlarson	3.37	imm_mode = beam_sync(odev.firstuse) > 0;
314	gregl	3.12	/* record new view */
315			if (v < viewhist \|\| v >= viewhist+VIEWHISTLEN) {
316			copystruct(viewhist + (nhist%VIEWHISTLEN), v);
317			nhist++;
318			}
319	gregl	3.10	}
320
321
322	gwlarson	3.36	set_focus(args) /* set focus frame */
323			char *args;
324			{
325			double hcent, vcent, hsiz, vsiz;
326			VIEW *dv, vwfocus;
327			int i, res[2];
328
329			i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz);
330			if (i < 2 \|\| hcent < 0 \|\| hcent > 1 \|\| vcent < 0 \|\| vcent > 1) {
331			beam_init(0); /* restore view */
332			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
333			beam_view(dv, res[0], res[1]);
334			beam_sync(0); /* update server */
335			return;
336			}
337			if (i < 4 \|\| hsiz <= hcent \|\| hsiz > 1 \|\| vsiz <= vcent \|\| vsiz > 1)
338			hsiz = vsiz = FSIZDEF; /* gave center only */
339			else {
340			hsiz -= hcent; hcent += 0.5hsiz; / gave min and max */
341			vsiz -= vcent; vcent += 0.5*vsiz;
342			}
343			beam_init(0); /* add basic views */
344			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
345			beam_view(dv, res[0]>>4, res[1]>>4);
346			copystruct(&vwfocus, &odev.v); /* add focus view */
347			switch (odev.v.type) {
348			case VT_PER:
349			vwfocus.horiz = 2.180./PIatan(
350			hsiz * tan(PI/180./2.*odev.v.horiz) );
351			vwfocus.vert = 2.180./PIatan(
352			vsiz * tan(PI/180./2.*odev.v.vert) );
353			break;
354			case VT_PAR:
355			case VT_ANG:
356			vwfocus.horiz = hsiz * odev.v.horiz;
357			vwfocus.vert = vsiz * odev.v.vert;
358			break;
359			case VT_HEM:
360			vwfocus.horiz = 2.180./PIasin(
361			hsiz * sin(PI/180./2.*odev.v.horiz) );
362			vwfocus.vert = 2.180./PIasin(
363			vsiz * sin(PI/180./2.*odev.v.vert) );
364			break;
365			case VT_CYL:
366			vwfocus.horiz = hsiz * odev.v.horiz;
367			vwfocus.vert = 2.180./PIatan(
368			vsiz * tan(PI/180./2.*odev.v.vert) );
369			break;
370			default:
371			error(INTERNAL, "bad view type in set_focus");
372			}
373			vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz;
374			vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz;
375			setview(&vwfocus);
376			beam_view(&vwfocus, (int)(3odev.hreshsiz)+100,
377			(int)(3odev.vresvsiz)+100);
378			beam_sync(0); /* update server */
379			}
380
381
382	gregl	3.10	int
383			usr_input() /* get user input and process it */
384			{
385			VIEW vparams;
386	gregl	3.23	char cmd[256];
387	gregl	3.10	register char *args;
388	gregl	3.11	register int i;
389	gregl	3.10
390	gregl	3.23	if (fgets(cmd, sizeof(cmd), sstdin) == NULL) {
391			fclose(sstdin);
392			sstdin = NULL;
393	gwlarson	3.26	return(-1);
394	gregl	3.23	}
395	gwlarson	3.31	if (*cmd == '\n')
396	gwlarson	3.26	return(DC_RESUME);
397	gregl	3.10	for (args = cmd; args && !isspace(args); args++)
398			;
399			while (isspace(*args))
400			*args++ = '\0';
401	gregl	3.11	if (*args && args[i=strlen(args)-1] == '\n')
402			args[i] = '\0';
403			for (i = 0; i < DC_NCMDS; i++)
404			if (!strcmp(cmd, cmdlist[i]))
405	gregl	3.10	break;
406	gregl	3.11	if (i >= DC_NCMDS) {
407	gwlarson	3.26	dev_auxcom(cmd, args);
408	gregl	3.10	return(-1);
409			}
410	gregl	3.11	switch (i) {
411	gregl	3.10	case DC_SETVIEW: /* set the view */
412			copystruct(&vparams, &odev.v);
413			if (!sscanview(&vparams, args))
414			error(COMMAND, "missing view options");
415			else
416			new_view(&vparams);
417			break;
418			case DC_GETVIEW: /* print the current view */
419			printview();
420	gregl	3.12	break;
421			case DC_LASTVIEW: /* restore previous view */
422			new_view(NULL);
423	gwlarson	3.36	break;
424			case DC_FOCUS: /* set focus frame */
425			set_focus(args);
426	gregl	3.10	break;
427			case DC_PAUSE: /* pause the current calculation */
428			case DC_RESUME: /* resume the calculation */
429			/* handled in main() */
430	gregl	3.13	break;
431			case DC_REDRAW: /* redraw from server */
432	gwlarson	3.24	imm_mode = beam_sync(1) > 0;
433	gregl	3.22	dev_clear();
434	gregl	3.14	break;
435			case DC_KILL: /* kill rtrace process(es) */
436			serv_request(DR_KILL, 0, NULL);
437			break;
438			case DC_CLOBBER: /* clobber holodeck */
439			serv_request(DR_CLOBBER, 0, NULL);
440			break;
441			case DC_RESTART: /* restart rtrace */
442			serv_request(DR_RESTART, 0, NULL);
443	gregl	3.10	break;
444			case DC_QUIT: /* quit request */
445			serv_request(DR_SHUTDOWN, 0, NULL);
446			break;
447			default:
448			error(CONSISTENCY, "bad command id in usr_input");
449			}
450	gregl	3.11	return(i);
451	gregl	3.10	}
452
453
454			printview() /* print our current view to server stdout */
455			{
456			fputs(VIEWSTR, sstdout);
457			fprintview(&odev.v, sstdout);
458			fputc('\n', sstdout);
459			fflush(sstdout);
460	gregl	3.1	}
461
462
463			int
464			serv_result() /* get next server result and process it */
465			{
466			static char *buf = NULL;
467			static int bufsiz = 0;
468			MSGHEAD msg;
469			int n;
470			/* read message header */
471			if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1)
472			goto readerr;
473			if (msg.nbytes > 0) { /* get the message body */
474			if (msg.nbytes > bufsiz) {
475			if (buf == NULL)
476			buf = (char *)malloc(bufsiz=msg.nbytes);
477			else
478			buf = (char *)realloc(buf, bufsiz=msg.nbytes);
479			if (buf == NULL)
480			error(SYSTEM, "out of memory in serv_result");
481			}
482			if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes)
483			goto readerr;
484			}
485			switch (msg.type) { /* process results */
486			case DS_BUNDLE:
487			if (msg.nbytes < sizeof(PACKHEAD) \|\|
488			msg.nbytes != packsiz(((PACKHEAD *)buf)->nr))
489			error(INTERNAL, "bad display packet from server");
490			disp_bundle((PACKHEAD *)buf);
491			break;
492			case DS_ADDHOLO:
493	gwlarson	3.38	if (msg.nbytes < sizeof(HDGRID)+2)
494	gregl	3.1	error(INTERNAL, "bad holodeck record from server");
495	gwlarson	3.38	add_holo((HDGRID *)buf, buf+sizeof(HDGRID),
496			buf+sizeof(HDGRID)+strlen(buf+sizeof(HDGRID))+1);
497	gregl	3.20	break;
498			case DS_OUTSECT:
499			do_outside = 1;
500	gwlarson	3.28	goto noargs;
501	gwlarson	3.25	case DS_EYESEP:
502			if (msg.nbytes <= 1 \|\| (eyesepdist = atof(buf)) <= FTINY)
503			error(INTERNAL, "bad eye separation from server");
504	gregl	3.1	break;
505			case DS_STARTIMM:
506			case DS_ENDIMM:
507	gwlarson	3.39	if (!(imm_mode = msg.type==DS_STARTIMM))
508			dev_flush();
509	gregl	3.21	#ifdef DEBUG
510	gwlarson	3.35	{
511	gregl	3.21	time_t tnow = time(NULL);
512	gwlarson	3.35	if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw;
513			else timm += tnow - tmodesw;
514	gregl	3.21	tmodesw = tnow;
515			}
516			#endif
517	gwlarson	3.28	goto noargs;
518	gregl	3.1	case DS_ACKNOW:
519			case DS_SHUTDOWN:
520	gwlarson	3.28	goto noargs;
521	gregl	3.1	default:
522			error(INTERNAL, "unrecognized result from server process");
523			}
524			return(msg.type); /* return message type */
525	gwlarson	3.28	noargs:
526			if (msg.nbytes) {
527			sprintf(errmsg, "unexpected body with server message %d",
528			msg.type);
529			error(INTERNAL, errmsg);
530			}
531			return(msg.type);
532	gregl	3.1	readerr:
533			if (feof(stdin))
534			error(SYSTEM, "server process died");
535			error(SYSTEM, "error reading from server process");
536			}
537
538
539			serv_request(type, nbytes, p) /* send a request to the server process */
540			int type, nbytes;
541			char *p;
542			{
543			MSGHEAD msg;
544			int m;
545	gwlarson	3.33	/* consistency checks */
546	gwlarson	3.37	DCHECK(nbytes < 0 \|\| nbytes > 0 & p == NULL,
547			CONSISTENCY, "bad buffer handed to serv_request");
548	gregl	3.1	/* get server's attention for big request */
549			if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) {
550			serv_request(DR_ATTEN, 0, NULL);
551			while ((m = serv_result()) != DS_ACKNOW)
552			if (m == DS_SHUTDOWN) /* the bugger quit on us */
553			quit(0);
554			}
555			msg.type = type; /* write and flush the message */
556			msg.nbytes = nbytes;
557			fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout);
558			if (nbytes > 0)
559			fwrite(p, 1, nbytes, stdout);
560			if (fflush(stdout) < 0)
561			error(SYSTEM, "write error in serv_request");
562	gregl	3.2	}
563
564
565			eputs(s) /* put error message to stderr */
566			register char *s;
567			{
568			static int midline = 0;
569
570			if (!*s)
571			return;
572			if (!midline++) { /* prepend line with program name */
573			fputs(progname, stderr);
574			fputs(": ", stderr);
575			}
576			fputs(s, stderr);
577			if (s[strlen(s)-1] == '\n') {
578			fflush(stderr);
579			midline = 0;
580			}
581	gregl	3.1	}
582
583
584			quit(code) /* clean up and exit */
585			int code;
586			{
587	gwlarson	3.38	if (code)
588			exit(code);
589	gregl	3.1	if (odev.v.type)
590			dev_close();
591	gwlarson	3.38	exit(0);
592	gregl	3.1	}