src/hd/rhdisp.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#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

#if defined(freebsd)
#define fbufcnt(f)      ((f)->_r)
#elif defined(__GNUC__)
#define fbufcnt(f)      ((f)->_IO_read_end - (f)->_IO_read_ptr)
#else
#define fbufcnt(f)      ((f)->_cnt)
#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[];
{
        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 || fbufcnt(stdin) > 0)
                flgs |= RDY_SRV;
        if (sstdin != NULL && fbufcnt(sstdin) > 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");
}


void
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;
        }
}


void
quit(code)                      /* clean up and exit */
int     code;
{
        if (code)
                exit(code);
        if (odev.v.type)
                dev_close();
        exit(0);
}
Revision:	3.43
Committed:	Sat Feb 22 02:07:24 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Changes since 3.42:	+6 -6 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	User	Rev	Content
1	gregl	3.1	#ifndef lint
2	greg	3.43	static const char RCSid[] = "$Id$";
3	gregl	3.1	#endif
4			/*
5			* Holodeck display process.
6			*/
7
8			#include "rholo.h"
9			#include "rhdisp.h"
10			#include "rhdriver.h"
11			#include "selcall.h"
12	gregl	3.10	#include <ctype.h>
13	gregl	3.1
14	gregl	3.12	#ifndef VIEWHISTLEN
15	gregl	3.16	#define VIEWHISTLEN 4 /* number of remembered views */
16	gregl	3.12	#endif
17
18	gwlarson	3.36	#ifndef FSIZDEF
19			#define FSIZDEF 0.125 /* default focus frame size */
20			#endif
21
22	greg	3.43	#if defined(freebsd)
23			#define fbufcnt(f) ((f)->_r)
24			#elif defined(__GNUC__)
25	gwlarson	3.42	#define fbufcnt(f) ((f)->_IO_read_end - (f)->_IO_read_ptr)
26			#else
27			#define fbufcnt(f) ((f)->_cnt)
28			#endif
29
30	gregl	3.1	HOLO hdlist[HDMAX+1]; / global holodeck list */
31
32	gwlarson	3.38	char hdgfn[HDMAX]; / holodeck section geometry list */
33			char hdpfn[HDMAX]; / section portal list */
34	gwlarson	3.37
35	gregl	3.10	char cmdlist[DC_NCMDS][8] = DC_INIT;
36
37	gregl	3.1	int imm_mode = 0; /* bundles are being delivered immediately */
38
39	gregl	3.20	int do_outside = 0; /* render from outside sections */
40
41	gwlarson	3.25	double eyesepdist = 1; /* eye separation distance */
42
43	gregl	3.1	char progname; / global argv[0] */
44
45	gregl	3.10	FILE sstdin, sstdout; /* server's standard input and output */
46	gregl	3.1
47	gregl	3.21	#ifdef DEBUG
48			extern time_t time();
49			static time_t tmodesw;
50			static time_t timm, tadd;
51			static long nimmrays, naddrays;
52			#endif
53
54	gregl	3.10	#define RDY_SRV 01
55			#define RDY_DEV 02
56			#define RDY_SIN 04
57	gregl	3.1
58	gregl	3.10
59	gregl	3.1	main(argc, argv)
60			int argc;
61			char *argv[];
62			{
63	gregl	3.3	int rdy, inp, res = 0, pause = 0;
64	gregl	3.1
65			progname = argv[0];
66	gregl	3.10	if (argc < 3)
67	gregl	3.1	error(USER, "bad command line arguments");
68			/* open our device */
69			dev_open(argv[1]);
70	gregl	3.10	/* open server process i/o */
71			sstdout = fdopen(atoi(argv[2]), "w");
72			if (argc < 4 \|\| (inp = atoi(argv[3])) < 0)
73			sstdin = NULL;
74			else
75			sstdin = fdopen(inp, "r");
76			/* set command error vector */
77			erract[COMMAND].pf = eputs;
78	gregl	3.21	#ifdef DEBUG
79			tmodesw = time(NULL);
80			#endif
81	gregl	3.1	/* enter main loop */
82			do {
83			rdy = disp_wait();
84	gregl	3.19	if (rdy & RDY_SRV) { /* process server result */
85			res = serv_result();
86			if (pause && res != DS_SHUTDOWN) {
87			serv_request(DR_ATTEN, 0, NULL);
88			while ((res = serv_result()) != DS_ACKNOW &&
89			res != DS_SHUTDOWN)
90			;
91			}
92			}
93	gregl	3.10	if (rdy & RDY_DEV) { /* user input from driver */
94	gregl	3.3	inp = dev_input();
95	gregl	3.13	if (inp & DFL(DC_SETVIEW))
96			new_view(&odev.v);
97	gwlarson	3.37	else if (inp & DFL(DC_LASTVIEW))
98			new_view(NULL);
99			if (inp & DFL(DC_REDRAW))
100			imm_mode = beam_sync(1) > 0;
101	gregl	3.13	if (inp & DFL(DC_GETVIEW))
102	gregl	3.10	printview();
103	gwlarson	3.36	if (inp & DFL(DC_FOCUS))
104			set_focus(odev_args);
105	gregl	3.15	if (inp & DFL(DC_KILL)) {
106	gregl	3.14	serv_request(DR_KILL, 0, NULL);
107	gregl	3.15	pause = 0;
108			}
109	gregl	3.14	if (inp & DFL(DC_CLOBBER))
110			serv_request(DR_CLOBBER, 0, NULL);
111	gregl	3.15	if (inp & DFL(DC_RESTART)) {
112	gregl	3.14	serv_request(DR_RESTART, 0, NULL);
113	gregl	3.15	pause = 0;
114			}
115	gwlarson	3.32	if (inp & DFL(DC_RESUME)) {
116			serv_request(DR_NOOP, 0, NULL);
117			pause = 0;
118			}
119			if (inp & DFL(DC_PAUSE))
120			pause = 1;
121	gregl	3.13	if (inp & DFL(DC_QUIT))
122			serv_request(DR_SHUTDOWN, 0, NULL);
123	gregl	3.3	}
124	gwlarson	3.34	if (rdy & RDY_SIN && !imm_mode) /* user input from sstdin */
125	gregl	3.10	switch (usr_input()) {
126			case DC_PAUSE:
127			pause = 1;
128			break;
129			case DC_RESUME:
130			serv_request(DR_NOOP, 0, NULL);
131	gregl	3.15	/* fall through */
132			case DC_KILL:
133			case DC_RESTART:
134	gregl	3.10	pause = 0;
135			break;
136			}
137	gregl	3.1	} while (res != DS_SHUTDOWN);
138	gregl	3.21	#ifdef DEBUG
139			if (timm && nimmrays)
140			fprintf(stderr,
141			"%s: %.1f rays recalled/second (%ld rays total)\n",
142			progname, (double)nimmrays/timm, nimmrays);
143			if (tadd && naddrays)
144			fprintf(stderr,
145			"%s: %.1f rays calculated/second (%ld rays total)\n",
146			progname, (double)naddrays/tadd, naddrays);
147			#endif
148	gregl	3.1	/* all done */
149			quit(0);
150			}
151
152
153			int
154			disp_wait() /* wait for more input */
155			{
156			fd_set readset, errset;
157			int flgs;
158			int n;
159			register int i;
160			/* see if we can avoid select call */
161	gwlarson	3.40	if (hdlist[0] == NULL)
162			return(RDY_SRV); /* initialize first */
163	gwlarson	3.30	flgs = 0; /* flag what's ready already */
164	gwlarson	3.42	if (imm_mode \|\| fbufcnt(stdin) > 0)
165	gwlarson	3.30	flgs \|= RDY_SRV;
166	gwlarson	3.42	if (sstdin != NULL && fbufcnt(sstdin) > 0)
167	gwlarson	3.30	flgs \|= RDY_SIN;
168			if (odev.inpready)
169			flgs \|= RDY_DEV;
170			if (flgs) /* got something? */
171			return(flgs);
172			if (dev_flush()) /* else flush output & check keyboard+mouse */
173	gregl	3.4	return(RDY_DEV);
174	gwlarson	3.30	/* if nothing, we need to call select */
175	gregl	3.1	FD_ZERO(&readset); FD_ZERO(&errset);
176			FD_SET(0, &readset);
177			FD_SET(0, &errset);
178			FD_SET(odev.ifd, &readset);
179			FD_SET(odev.ifd, &errset);
180	gregl	3.10	n = odev.ifd+1;
181			if (sstdin != NULL) {
182			FD_SET(fileno(sstdin), &readset);
183	gregl	3.23	FD_SET(fileno(sstdin), &errset);
184	gregl	3.10	if (fileno(sstdin) >= n)
185			n = fileno(sstdin) + 1;
186			}
187	gregl	3.1	n = select(n, &readset, NULL, &errset, NULL);
188			if (n < 0) {
189			if (errno == EINTR)
190			return(0);
191			error(SYSTEM, "select call failure in disp_wait");
192			}
193			if (FD_ISSET(0, &readset) \|\| FD_ISSET(0, &errset))
194	gregl	3.4	flgs \|= RDY_SRV;
195	gregl	3.1	if (FD_ISSET(odev.ifd, &readset) \|\| FD_ISSET(odev.ifd, &errset))
196	gregl	3.4	flgs \|= RDY_DEV;
197	gregl	3.23	if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) \|\|
198			FD_ISSET(fileno(sstdin), &errset)))
199	gregl	3.10	flgs \|= RDY_SIN;
200	gregl	3.1	return(flgs);
201			}
202
203
204	gwlarson	3.38	add_holo(hdg, gfn, pfn) /* register a new holodeck section */
205	gregl	3.1	HDGRID *hdg;
206	gwlarson	3.38	char gfn, pfn;
207	gregl	3.1	{
208			VIEW nv;
209	gregl	3.20	double d;
210	gregl	3.1	register int hd;
211
212			for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++)
213			;
214			if (hd >= HDMAX)
215			error(INTERNAL, "too many holodeck sections in add_holo");
216			hdlist[hd] = (HOLO *)malloc(sizeof(HOLO));
217			if (hdlist[hd] == NULL)
218			error(SYSTEM, "out of memory in add_holo");
219			bcopy((char )hdg, (char )hdlist[hd], sizeof(HDGRID));
220			hdcompgrid(hdlist[hd]);
221	gwlarson	3.38	hdgfn[hd] = savestr(gfn);
222			hdpfn[hd] = pfn && pfn ? savestr(pfn) : (char )NULL;
223	gregl	3.1	if (hd)
224			return;
225			/* set initial viewpoint */
226			copystruct(&nv, &odev.v);
227			VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5);
228			VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5);
229			VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5);
230			fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]);
231			VCOPY(nv.vup, hdlist[0]->xv[2]);
232	gregl	3.20	if (do_outside) {
233			normalize(nv.vdir);
234			d = VLEN(hdlist[0]->xv[1]);
235			d += VLEN(hdlist[0]->xv[2]);
236			VSUM(nv.vp, nv.vp, nv.vdir, -d);
237			}
238	gregl	3.1	new_view(&nv);
239			}
240
241
242			disp_bundle(p) /* display a ray bundle */
243			register PACKHEAD *p;
244			{
245			GCOORD gc[2];
246			FVECT ro, rd, wp;
247			double d;
248			register int i;
249			/* get beam coordinates */
250			if (p->hd < 0 \| p->hd >= HDMAX \|\| hdlist[p->hd] == NULL)
251			error(INTERNAL, "bad holodeck number in disp_bundle");
252			if (!hdbcoord(gc, hdlist[p->hd], p->bi))
253			error(INTERNAL, "bad beam index in disp_bundle");
254			/* display each ray */
255			for (i = p->nr; i--; ) {
256			hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r);
257			d = hddepth(hdlist[p->hd], packra(p)[i].d);
258	gwlarson	3.29	if (d < .99*FHUGE) {
259			VSUM(wp, ro, rd, d); /* might be behind viewpoint */
260			dev_value(packra(p)[i].v, rd, wp);
261			} else
262			dev_value(packra(p)[i].v, rd, NULL);
263	gregl	3.1	}
264	gregl	3.21	#ifdef DEBUG
265			if (imm_mode) nimmrays += p->nr;
266			else naddrays += p->nr;
267			#endif
268	gregl	3.1	}
269
270
271			new_view(v) /* change view parameters */
272	gregl	3.12	register VIEW *v;
273	gregl	3.1	{
274	gregl	3.12	static VIEW viewhist[VIEWHISTLEN];
275			static unsigned nhist;
276	gwlarson	3.24	VIEW *dv;
277	gwlarson	3.40	int i, res[2];
278			int2 *slist;
279	gregl	3.1	char *err;
280	gregl	3.12	/* restore previous view? */
281			if (v == NULL) {
282	gregl	3.16	if (nhist > 1) /* get one before last setting */
283			nhist--;
284			else /* else go to end of list */
285			while (nhist < VIEWHISTLEN && viewhist[nhist].type)
286			nhist++;
287	gregl	3.12	v = viewhist + ((nhist-1)%VIEWHISTLEN);
288	gregl	3.17	} else
289			again:
290			if ((err = setview(v)) != NULL) {
291	gregl	3.12	error(COMMAND, err);
292			return;
293			}
294	gwlarson	3.37	if (!dev_view(v)) /* notify display driver */
295			goto again;
296	gregl	3.12	if (v->type == VT_PAR) {
297			error(COMMAND, "cannot handle parallel views");
298			return;
299			}
300	gwlarson	3.37	beam_init(odev.firstuse); /* compute new beam set */
301			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) {
302			if ((slist = beam_view(dv, res[0], res[1])) == NULL) {
303	gwlarson	3.24	if (!nhist) {
304			error(COMMAND, "invalid starting view");
305			return;
306			}
307			copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN));
308	gwlarson	3.37	goto again; /* poss. overloading dev_section()? */
309			}
310			DCHECK(*slist < 0, WARNING, "no visible sections in new_view");
311	gwlarson	3.38	for ( ; *slist >= 0; slist++)
312			dev_section(hdgfn[slist], hdpfn[slist]);
313	gwlarson	3.37	}
314	gwlarson	3.38	dev_section(NULL,NULL); /* end section list */
315	gwlarson	3.37	dev_flush(); /* update display */
316	gwlarson	3.34	/* update server */
317	gwlarson	3.37	imm_mode = beam_sync(odev.firstuse) > 0;
318	gregl	3.12	/* record new view */
319			if (v < viewhist \|\| v >= viewhist+VIEWHISTLEN) {
320			copystruct(viewhist + (nhist%VIEWHISTLEN), v);
321			nhist++;
322			}
323	gregl	3.10	}
324
325
326	gwlarson	3.36	set_focus(args) /* set focus frame */
327			char *args;
328			{
329			double hcent, vcent, hsiz, vsiz;
330			VIEW *dv, vwfocus;
331			int i, res[2];
332
333			i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz);
334			if (i < 2 \|\| hcent < 0 \|\| hcent > 1 \|\| vcent < 0 \|\| vcent > 1) {
335			beam_init(0); /* restore view */
336			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
337			beam_view(dv, res[0], res[1]);
338			beam_sync(0); /* update server */
339			return;
340			}
341			if (i < 4 \|\| hsiz <= hcent \|\| hsiz > 1 \|\| vsiz <= vcent \|\| vsiz > 1)
342			hsiz = vsiz = FSIZDEF; /* gave center only */
343			else {
344			hsiz -= hcent; hcent += 0.5hsiz; / gave min and max */
345			vsiz -= vcent; vcent += 0.5*vsiz;
346			}
347			beam_init(0); /* add basic views */
348			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
349			beam_view(dv, res[0]>>4, res[1]>>4);
350			copystruct(&vwfocus, &odev.v); /* add focus view */
351			switch (odev.v.type) {
352			case VT_PER:
353			vwfocus.horiz = 2.180./PIatan(
354			hsiz * tan(PI/180./2.*odev.v.horiz) );
355			vwfocus.vert = 2.180./PIatan(
356			vsiz * tan(PI/180./2.*odev.v.vert) );
357			break;
358			case VT_PAR:
359			case VT_ANG:
360			vwfocus.horiz = hsiz * odev.v.horiz;
361			vwfocus.vert = vsiz * odev.v.vert;
362			break;
363			case VT_HEM:
364			vwfocus.horiz = 2.180./PIasin(
365			hsiz * sin(PI/180./2.*odev.v.horiz) );
366			vwfocus.vert = 2.180./PIasin(
367			vsiz * sin(PI/180./2.*odev.v.vert) );
368			break;
369			case VT_CYL:
370			vwfocus.horiz = hsiz * odev.v.horiz;
371			vwfocus.vert = 2.180./PIatan(
372			vsiz * tan(PI/180./2.*odev.v.vert) );
373			break;
374			default:
375			error(INTERNAL, "bad view type in set_focus");
376			}
377			vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz;
378			vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz;
379			setview(&vwfocus);
380			beam_view(&vwfocus, (int)(3odev.hreshsiz)+100,
381			(int)(3odev.vresvsiz)+100);
382			beam_sync(0); /* update server */
383			}
384
385
386	gregl	3.10	int
387			usr_input() /* get user input and process it */
388			{
389			VIEW vparams;
390	gregl	3.23	char cmd[256];
391	gregl	3.10	register char *args;
392	gregl	3.11	register int i;
393	gregl	3.10
394	gregl	3.23	if (fgets(cmd, sizeof(cmd), sstdin) == NULL) {
395			fclose(sstdin);
396			sstdin = NULL;
397	gwlarson	3.26	return(-1);
398	gregl	3.23	}
399	gwlarson	3.31	if (*cmd == '\n')
400	gwlarson	3.26	return(DC_RESUME);
401	gregl	3.10	for (args = cmd; args && !isspace(args); args++)
402			;
403			while (isspace(*args))
404			*args++ = '\0';
405	gregl	3.11	if (*args && args[i=strlen(args)-1] == '\n')
406			args[i] = '\0';
407			for (i = 0; i < DC_NCMDS; i++)
408			if (!strcmp(cmd, cmdlist[i]))
409	gregl	3.10	break;
410	gregl	3.11	if (i >= DC_NCMDS) {
411	gwlarson	3.26	dev_auxcom(cmd, args);
412	gregl	3.10	return(-1);
413			}
414	gregl	3.11	switch (i) {
415	gregl	3.10	case DC_SETVIEW: /* set the view */
416			copystruct(&vparams, &odev.v);
417			if (!sscanview(&vparams, args))
418			error(COMMAND, "missing view options");
419			else
420			new_view(&vparams);
421			break;
422			case DC_GETVIEW: /* print the current view */
423			printview();
424	gregl	3.12	break;
425			case DC_LASTVIEW: /* restore previous view */
426			new_view(NULL);
427	gwlarson	3.36	break;
428			case DC_FOCUS: /* set focus frame */
429			set_focus(args);
430	gregl	3.10	break;
431			case DC_PAUSE: /* pause the current calculation */
432			case DC_RESUME: /* resume the calculation */
433			/* handled in main() */
434	gregl	3.13	break;
435			case DC_REDRAW: /* redraw from server */
436	gwlarson	3.24	imm_mode = beam_sync(1) > 0;
437	gregl	3.22	dev_clear();
438	gregl	3.14	break;
439			case DC_KILL: /* kill rtrace process(es) */
440			serv_request(DR_KILL, 0, NULL);
441			break;
442			case DC_CLOBBER: /* clobber holodeck */
443			serv_request(DR_CLOBBER, 0, NULL);
444			break;
445			case DC_RESTART: /* restart rtrace */
446			serv_request(DR_RESTART, 0, NULL);
447	gregl	3.10	break;
448			case DC_QUIT: /* quit request */
449			serv_request(DR_SHUTDOWN, 0, NULL);
450			break;
451			default:
452			error(CONSISTENCY, "bad command id in usr_input");
453			}
454	gregl	3.11	return(i);
455	gregl	3.10	}
456
457
458			printview() /* print our current view to server stdout */
459			{
460			fputs(VIEWSTR, sstdout);
461			fprintview(&odev.v, sstdout);
462			fputc('\n', sstdout);
463			fflush(sstdout);
464	gregl	3.1	}
465
466
467			int
468			serv_result() /* get next server result and process it */
469			{
470			static char *buf = NULL;
471			static int bufsiz = 0;
472			MSGHEAD msg;
473			int n;
474			/* read message header */
475			if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1)
476			goto readerr;
477			if (msg.nbytes > 0) { /* get the message body */
478			if (msg.nbytes > bufsiz) {
479			if (buf == NULL)
480			buf = (char *)malloc(bufsiz=msg.nbytes);
481			else
482			buf = (char *)realloc(buf, bufsiz=msg.nbytes);
483			if (buf == NULL)
484			error(SYSTEM, "out of memory in serv_result");
485			}
486			if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes)
487			goto readerr;
488			}
489			switch (msg.type) { /* process results */
490			case DS_BUNDLE:
491			if (msg.nbytes < sizeof(PACKHEAD) \|\|
492			msg.nbytes != packsiz(((PACKHEAD *)buf)->nr))
493			error(INTERNAL, "bad display packet from server");
494			disp_bundle((PACKHEAD *)buf);
495			break;
496			case DS_ADDHOLO:
497	gwlarson	3.38	if (msg.nbytes < sizeof(HDGRID)+2)
498	gregl	3.1	error(INTERNAL, "bad holodeck record from server");
499	gwlarson	3.38	add_holo((HDGRID *)buf, buf+sizeof(HDGRID),
500			buf+sizeof(HDGRID)+strlen(buf+sizeof(HDGRID))+1);
501	gregl	3.20	break;
502			case DS_OUTSECT:
503			do_outside = 1;
504	gwlarson	3.28	goto noargs;
505	gwlarson	3.25	case DS_EYESEP:
506			if (msg.nbytes <= 1 \|\| (eyesepdist = atof(buf)) <= FTINY)
507			error(INTERNAL, "bad eye separation from server");
508	gregl	3.1	break;
509			case DS_STARTIMM:
510			case DS_ENDIMM:
511	gwlarson	3.39	if (!(imm_mode = msg.type==DS_STARTIMM))
512			dev_flush();
513	gregl	3.21	#ifdef DEBUG
514	gwlarson	3.35	{
515	gregl	3.21	time_t tnow = time(NULL);
516	gwlarson	3.35	if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw;
517			else timm += tnow - tmodesw;
518	gregl	3.21	tmodesw = tnow;
519			}
520			#endif
521	gwlarson	3.28	goto noargs;
522	gregl	3.1	case DS_ACKNOW:
523			case DS_SHUTDOWN:
524	gwlarson	3.28	goto noargs;
525	gregl	3.1	default:
526			error(INTERNAL, "unrecognized result from server process");
527			}
528			return(msg.type); /* return message type */
529	gwlarson	3.28	noargs:
530			if (msg.nbytes) {
531			sprintf(errmsg, "unexpected body with server message %d",
532			msg.type);
533			error(INTERNAL, errmsg);
534			}
535			return(msg.type);
536	gregl	3.1	readerr:
537			if (feof(stdin))
538			error(SYSTEM, "server process died");
539			error(SYSTEM, "error reading from server process");
540			}
541
542
543			serv_request(type, nbytes, p) /* send a request to the server process */
544			int type, nbytes;
545			char *p;
546			{
547			MSGHEAD msg;
548			int m;
549	gwlarson	3.33	/* consistency checks */
550	gwlarson	3.37	DCHECK(nbytes < 0 \|\| nbytes > 0 & p == NULL,
551			CONSISTENCY, "bad buffer handed to serv_request");
552	gregl	3.1	/* get server's attention for big request */
553			if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) {
554			serv_request(DR_ATTEN, 0, NULL);
555			while ((m = serv_result()) != DS_ACKNOW)
556			if (m == DS_SHUTDOWN) /* the bugger quit on us */
557			quit(0);
558			}
559			msg.type = type; /* write and flush the message */
560			msg.nbytes = nbytes;
561			fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout);
562			if (nbytes > 0)
563			fwrite(p, 1, nbytes, stdout);
564			if (fflush(stdout) < 0)
565			error(SYSTEM, "write error in serv_request");
566	gregl	3.2	}
567
568
569	greg	3.43	void
570	gregl	3.2	eputs(s) /* put error message to stderr */
571			register char *s;
572			{
573			static int midline = 0;
574
575			if (!*s)
576			return;
577			if (!midline++) { /* prepend line with program name */
578			fputs(progname, stderr);
579			fputs(": ", stderr);
580			}
581			fputs(s, stderr);
582			if (s[strlen(s)-1] == '\n') {
583			fflush(stderr);
584			midline = 0;
585			}
586	gregl	3.1	}
587
588
589	greg	3.43	void
590	gregl	3.1	quit(code) /* clean up and exit */
591			int code;
592			{
593	gwlarson	3.38	if (code)
594			exit(code);
595	gregl	3.1	if (odev.v.type)
596			dev_close();
597	gwlarson	3.38	exit(0);
598	gregl	3.1	}