src/hd/rhdisp.c

/* Copyright (c) 1998 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    *hdofn[HDMAX+1];        /* holodeck section octree 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
#include <sys/types.h>
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 */
        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, ofn)              /* register a new holodeck section */
HDGRID  *hdg;
char    *ofn;
{
        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]);
        hdofn[hd] = savestr(ofn);
        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], *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");
                while (*slist >= 0)
                        dev_section(hdofn[*slist++]);
        }
        dev_section(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))
                        error(INTERNAL, "bad holodeck record from server");
                add_holo((HDGRID *)buf, buf+sizeof(HDGRID));
                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:
#ifdef DEBUG
                {
                        time_t  tnow = time(NULL);
                        if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw;
                        else timm += tnow - tmodesw;
                        tmodesw = tnow;
                }
#endif
                if (!(imm_mode = msg.type==DS_STARTIMM))
                        dev_flush();
                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 (odev.v.type)
                dev_close();
        exit(code);
}
Revision:	3.37
Committed:	Fri Dec 18 11:56:10 1998 UTC (25 years, 4 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 3.36:	+28 -21 lines
Log Message:	created new ogl driver with direct geometry rendering
#	User	Rev	Content
1	gregl	3.23	/* Copyright (c) 1998 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	3.37	char hdofn[HDMAX+1]; / holodeck section octree list */
28
29	gregl	3.10	char cmdlist[DC_NCMDS][8] = DC_INIT;
30
31	gregl	3.1	int imm_mode = 0; /* bundles are being delivered immediately */
32
33	gregl	3.20	int do_outside = 0; /* render from outside sections */
34
35	gwlarson	3.25	double eyesepdist = 1; /* eye separation distance */
36
37	gregl	3.1	char progname; / global argv[0] */
38
39	gregl	3.10	FILE sstdin, sstdout; /* server's standard input and output */
40	gregl	3.1
41	gregl	3.21	#ifdef DEBUG
42			#include <sys/types.h>
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	3.30	flgs = 0; /* flag what's ready already */
158	gregl	3.1	if (imm_mode \|\| stdin->_cnt > 0)
159	gwlarson	3.30	flgs \|= RDY_SRV;
160	gregl	3.10	if (sstdin != NULL && sstdin->_cnt > 0)
161	gwlarson	3.30	flgs \|= RDY_SIN;
162			if (odev.inpready)
163			flgs \|= RDY_DEV;
164			if (flgs) /* got something? */
165			return(flgs);
166			if (dev_flush()) /* else flush output & check keyboard+mouse */
167	gregl	3.4	return(RDY_DEV);
168	gwlarson	3.30	/* if nothing, we need to call select */
169	gregl	3.1	FD_ZERO(&readset); FD_ZERO(&errset);
170			FD_SET(0, &readset);
171			FD_SET(0, &errset);
172			FD_SET(odev.ifd, &readset);
173			FD_SET(odev.ifd, &errset);
174	gregl	3.10	n = odev.ifd+1;
175			if (sstdin != NULL) {
176			FD_SET(fileno(sstdin), &readset);
177	gregl	3.23	FD_SET(fileno(sstdin), &errset);
178	gregl	3.10	if (fileno(sstdin) >= n)
179			n = fileno(sstdin) + 1;
180			}
181	gregl	3.1	n = select(n, &readset, NULL, &errset, NULL);
182			if (n < 0) {
183			if (errno == EINTR)
184			return(0);
185			error(SYSTEM, "select call failure in disp_wait");
186			}
187			if (FD_ISSET(0, &readset) \|\| FD_ISSET(0, &errset))
188	gregl	3.4	flgs \|= RDY_SRV;
189	gregl	3.1	if (FD_ISSET(odev.ifd, &readset) \|\| FD_ISSET(odev.ifd, &errset))
190	gregl	3.4	flgs \|= RDY_DEV;
191	gregl	3.23	if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) \|\|
192			FD_ISSET(fileno(sstdin), &errset)))
193	gregl	3.10	flgs \|= RDY_SIN;
194	gregl	3.1	return(flgs);
195			}
196
197
198	gwlarson	3.37	add_holo(hdg, ofn) /* register a new holodeck section */
199	gregl	3.1	HDGRID *hdg;
200	gwlarson	3.37	char *ofn;
201	gregl	3.1	{
202			VIEW nv;
203	gregl	3.20	double d;
204	gregl	3.1	register int hd;
205
206			for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++)
207			;
208			if (hd >= HDMAX)
209			error(INTERNAL, "too many holodeck sections in add_holo");
210			hdlist[hd] = (HOLO *)malloc(sizeof(HOLO));
211			if (hdlist[hd] == NULL)
212			error(SYSTEM, "out of memory in add_holo");
213			bcopy((char )hdg, (char )hdlist[hd], sizeof(HDGRID));
214			hdcompgrid(hdlist[hd]);
215	gwlarson	3.37	hdofn[hd] = savestr(ofn);
216	gregl	3.1	if (hd)
217			return;
218			/* set initial viewpoint */
219			copystruct(&nv, &odev.v);
220			VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5);
221			VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5);
222			VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5);
223			fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]);
224			VCOPY(nv.vup, hdlist[0]->xv[2]);
225	gregl	3.20	if (do_outside) {
226			normalize(nv.vdir);
227			d = VLEN(hdlist[0]->xv[1]);
228			d += VLEN(hdlist[0]->xv[2]);
229			VSUM(nv.vp, nv.vp, nv.vdir, -d);
230			}
231	gregl	3.1	new_view(&nv);
232			}
233
234
235			disp_bundle(p) /* display a ray bundle */
236			register PACKHEAD *p;
237			{
238			GCOORD gc[2];
239			FVECT ro, rd, wp;
240			double d;
241			register int i;
242			/* get beam coordinates */
243			if (p->hd < 0 \| p->hd >= HDMAX \|\| hdlist[p->hd] == NULL)
244			error(INTERNAL, "bad holodeck number in disp_bundle");
245			if (!hdbcoord(gc, hdlist[p->hd], p->bi))
246			error(INTERNAL, "bad beam index in disp_bundle");
247			/* display each ray */
248			for (i = p->nr; i--; ) {
249			hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r);
250			d = hddepth(hdlist[p->hd], packra(p)[i].d);
251	gwlarson	3.29	if (d < .99*FHUGE) {
252			VSUM(wp, ro, rd, d); /* might be behind viewpoint */
253			dev_value(packra(p)[i].v, rd, wp);
254			} else
255			dev_value(packra(p)[i].v, rd, NULL);
256	gregl	3.1	}
257	gregl	3.21	#ifdef DEBUG
258			if (imm_mode) nimmrays += p->nr;
259			else naddrays += p->nr;
260			#endif
261	gregl	3.1	}
262
263
264			new_view(v) /* change view parameters */
265	gregl	3.12	register VIEW *v;
266	gregl	3.1	{
267	gregl	3.12	static VIEW viewhist[VIEWHISTLEN];
268			static unsigned nhist;
269	gwlarson	3.24	VIEW *dv;
270	gwlarson	3.37	int i, res[2], *slist;
271	gregl	3.1	char *err;
272	gregl	3.12	/* restore previous view? */
273			if (v == NULL) {
274	gregl	3.16	if (nhist > 1) /* get one before last setting */
275			nhist--;
276			else /* else go to end of list */
277			while (nhist < VIEWHISTLEN && viewhist[nhist].type)
278			nhist++;
279	gregl	3.12	v = viewhist + ((nhist-1)%VIEWHISTLEN);
280	gregl	3.17	} else
281			again:
282			if ((err = setview(v)) != NULL) {
283	gregl	3.12	error(COMMAND, err);
284			return;
285			}
286	gwlarson	3.37	if (!dev_view(v)) /* notify display driver */
287			goto again;
288	gregl	3.12	if (v->type == VT_PAR) {
289			error(COMMAND, "cannot handle parallel views");
290			return;
291			}
292	gwlarson	3.37	beam_init(odev.firstuse); /* compute new beam set */
293			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) {
294			if ((slist = beam_view(dv, res[0], res[1])) == NULL) {
295	gwlarson	3.24	if (!nhist) {
296			error(COMMAND, "invalid starting view");
297			return;
298			}
299			copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN));
300	gwlarson	3.37	goto again; /* poss. overloading dev_section()? */
301			}
302			DCHECK(*slist < 0, WARNING, "no visible sections in new_view");
303			while (*slist >= 0)
304			dev_section(hdofn[*slist++]);
305			}
306			dev_section(NULL); /* end section list */
307			dev_flush(); /* update display */
308	gwlarson	3.34	/* update server */
309	gwlarson	3.37	imm_mode = beam_sync(odev.firstuse) > 0;
310	gregl	3.12	/* record new view */
311			if (v < viewhist \|\| v >= viewhist+VIEWHISTLEN) {
312			copystruct(viewhist + (nhist%VIEWHISTLEN), v);
313			nhist++;
314			}
315	gregl	3.10	}
316
317
318	gwlarson	3.36	set_focus(args) /* set focus frame */
319			char *args;
320			{
321			double hcent, vcent, hsiz, vsiz;
322			VIEW *dv, vwfocus;
323			int i, res[2];
324
325			i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz);
326			if (i < 2 \|\| hcent < 0 \|\| hcent > 1 \|\| vcent < 0 \|\| vcent > 1) {
327			beam_init(0); /* restore view */
328			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
329			beam_view(dv, res[0], res[1]);
330			beam_sync(0); /* update server */
331			return;
332			}
333			if (i < 4 \|\| hsiz <= hcent \|\| hsiz > 1 \|\| vsiz <= vcent \|\| vsiz > 1)
334			hsiz = vsiz = FSIZDEF; /* gave center only */
335			else {
336			hsiz -= hcent; hcent += 0.5hsiz; / gave min and max */
337			vsiz -= vcent; vcent += 0.5*vsiz;
338			}
339			beam_init(0); /* add basic views */
340			for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
341			beam_view(dv, res[0]>>4, res[1]>>4);
342			copystruct(&vwfocus, &odev.v); /* add focus view */
343			switch (odev.v.type) {
344			case VT_PER:
345			vwfocus.horiz = 2.180./PIatan(
346			hsiz * tan(PI/180./2.*odev.v.horiz) );
347			vwfocus.vert = 2.180./PIatan(
348			vsiz * tan(PI/180./2.*odev.v.vert) );
349			break;
350			case VT_PAR:
351			case VT_ANG:
352			vwfocus.horiz = hsiz * odev.v.horiz;
353			vwfocus.vert = vsiz * odev.v.vert;
354			break;
355			case VT_HEM:
356			vwfocus.horiz = 2.180./PIasin(
357			hsiz * sin(PI/180./2.*odev.v.horiz) );
358			vwfocus.vert = 2.180./PIasin(
359			vsiz * sin(PI/180./2.*odev.v.vert) );
360			break;
361			case VT_CYL:
362			vwfocus.horiz = hsiz * odev.v.horiz;
363			vwfocus.vert = 2.180./PIatan(
364			vsiz * tan(PI/180./2.*odev.v.vert) );
365			break;
366			default:
367			error(INTERNAL, "bad view type in set_focus");
368			}
369			vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz;
370			vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz;
371			setview(&vwfocus);
372			beam_view(&vwfocus, (int)(3odev.hreshsiz)+100,
373			(int)(3odev.vresvsiz)+100);
374			beam_sync(0); /* update server */
375			}
376
377
378	gregl	3.10	int
379			usr_input() /* get user input and process it */
380			{
381			VIEW vparams;
382	gregl	3.23	char cmd[256];
383	gregl	3.10	register char *args;
384	gregl	3.11	register int i;
385	gregl	3.10
386	gregl	3.23	if (fgets(cmd, sizeof(cmd), sstdin) == NULL) {
387			fclose(sstdin);
388			sstdin = NULL;
389	gwlarson	3.26	return(-1);
390	gregl	3.23	}
391	gwlarson	3.31	if (*cmd == '\n')
392	gwlarson	3.26	return(DC_RESUME);
393	gregl	3.10	for (args = cmd; args && !isspace(args); args++)
394			;
395			while (isspace(*args))
396			*args++ = '\0';
397	gregl	3.11	if (*args && args[i=strlen(args)-1] == '\n')
398			args[i] = '\0';
399			for (i = 0; i < DC_NCMDS; i++)
400			if (!strcmp(cmd, cmdlist[i]))
401	gregl	3.10	break;
402	gregl	3.11	if (i >= DC_NCMDS) {
403	gwlarson	3.26	dev_auxcom(cmd, args);
404	gregl	3.10	return(-1);
405			}
406	gregl	3.11	switch (i) {
407	gregl	3.10	case DC_SETVIEW: /* set the view */
408			copystruct(&vparams, &odev.v);
409			if (!sscanview(&vparams, args))
410			error(COMMAND, "missing view options");
411			else
412			new_view(&vparams);
413			break;
414			case DC_GETVIEW: /* print the current view */
415			printview();
416	gregl	3.12	break;
417			case DC_LASTVIEW: /* restore previous view */
418			new_view(NULL);
419	gwlarson	3.36	break;
420			case DC_FOCUS: /* set focus frame */
421			set_focus(args);
422	gregl	3.10	break;
423			case DC_PAUSE: /* pause the current calculation */
424			case DC_RESUME: /* resume the calculation */
425			/* handled in main() */
426	gregl	3.13	break;
427			case DC_REDRAW: /* redraw from server */
428	gwlarson	3.24	imm_mode = beam_sync(1) > 0;
429	gregl	3.22	dev_clear();
430	gregl	3.14	break;
431			case DC_KILL: /* kill rtrace process(es) */
432			serv_request(DR_KILL, 0, NULL);
433			break;
434			case DC_CLOBBER: /* clobber holodeck */
435			serv_request(DR_CLOBBER, 0, NULL);
436			break;
437			case DC_RESTART: /* restart rtrace */
438			serv_request(DR_RESTART, 0, NULL);
439	gregl	3.10	break;
440			case DC_QUIT: /* quit request */
441			serv_request(DR_SHUTDOWN, 0, NULL);
442			break;
443			default:
444			error(CONSISTENCY, "bad command id in usr_input");
445			}
446	gregl	3.11	return(i);
447	gregl	3.10	}
448
449
450			printview() /* print our current view to server stdout */
451			{
452			fputs(VIEWSTR, sstdout);
453			fprintview(&odev.v, sstdout);
454			fputc('\n', sstdout);
455			fflush(sstdout);
456	gregl	3.1	}
457
458
459			int
460			serv_result() /* get next server result and process it */
461			{
462			static char *buf = NULL;
463			static int bufsiz = 0;
464			MSGHEAD msg;
465			int n;
466			/* read message header */
467			if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1)
468			goto readerr;
469			if (msg.nbytes > 0) { /* get the message body */
470			if (msg.nbytes > bufsiz) {
471			if (buf == NULL)
472			buf = (char *)malloc(bufsiz=msg.nbytes);
473			else
474			buf = (char *)realloc(buf, bufsiz=msg.nbytes);
475			if (buf == NULL)
476			error(SYSTEM, "out of memory in serv_result");
477			}
478			if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes)
479			goto readerr;
480			}
481			switch (msg.type) { /* process results */
482			case DS_BUNDLE:
483			if (msg.nbytes < sizeof(PACKHEAD) \|\|
484			msg.nbytes != packsiz(((PACKHEAD *)buf)->nr))
485			error(INTERNAL, "bad display packet from server");
486			disp_bundle((PACKHEAD *)buf);
487			break;
488			case DS_ADDHOLO:
489	gwlarson	3.37	if (msg.nbytes <= sizeof(HDGRID))
490	gregl	3.1	error(INTERNAL, "bad holodeck record from server");
491	gwlarson	3.37	add_holo((HDGRID *)buf, buf+sizeof(HDGRID));
492	gregl	3.20	break;
493			case DS_OUTSECT:
494			do_outside = 1;
495	gwlarson	3.28	goto noargs;
496	gwlarson	3.25	case DS_EYESEP:
497			if (msg.nbytes <= 1 \|\| (eyesepdist = atof(buf)) <= FTINY)
498			error(INTERNAL, "bad eye separation from server");
499	gregl	3.1	break;
500			case DS_STARTIMM:
501			case DS_ENDIMM:
502	gregl	3.21	#ifdef DEBUG
503	gwlarson	3.35	{
504	gregl	3.21	time_t tnow = time(NULL);
505	gwlarson	3.35	if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw;
506			else timm += tnow - tmodesw;
507	gregl	3.21	tmodesw = tnow;
508			}
509			#endif
510	gwlarson	3.34	if (!(imm_mode = msg.type==DS_STARTIMM))
511			dev_flush();
512	gwlarson	3.28	goto noargs;
513	gregl	3.1	case DS_ACKNOW:
514			case DS_SHUTDOWN:
515	gwlarson	3.28	goto noargs;
516	gregl	3.1	default:
517			error(INTERNAL, "unrecognized result from server process");
518			}
519			return(msg.type); /* return message type */
520	gwlarson	3.28	noargs:
521			if (msg.nbytes) {
522			sprintf(errmsg, "unexpected body with server message %d",
523			msg.type);
524			error(INTERNAL, errmsg);
525			}
526			return(msg.type);
527	gregl	3.1	readerr:
528			if (feof(stdin))
529			error(SYSTEM, "server process died");
530			error(SYSTEM, "error reading from server process");
531			}
532
533
534			serv_request(type, nbytes, p) /* send a request to the server process */
535			int type, nbytes;
536			char *p;
537			{
538			MSGHEAD msg;
539			int m;
540	gwlarson	3.33	/* consistency checks */
541	gwlarson	3.37	DCHECK(nbytes < 0 \|\| nbytes > 0 & p == NULL,
542			CONSISTENCY, "bad buffer handed to serv_request");
543	gregl	3.1	/* get server's attention for big request */
544			if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) {
545			serv_request(DR_ATTEN, 0, NULL);
546			while ((m = serv_result()) != DS_ACKNOW)
547			if (m == DS_SHUTDOWN) /* the bugger quit on us */
548			quit(0);
549			}
550			msg.type = type; /* write and flush the message */
551			msg.nbytes = nbytes;
552			fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout);
553			if (nbytes > 0)
554			fwrite(p, 1, nbytes, stdout);
555			if (fflush(stdout) < 0)
556			error(SYSTEM, "write error in serv_request");
557	gregl	3.2	}
558
559
560			eputs(s) /* put error message to stderr */
561			register char *s;
562			{
563			static int midline = 0;
564
565			if (!*s)
566			return;
567			if (!midline++) { /* prepend line with program name */
568			fputs(progname, stderr);
569			fputs(": ", stderr);
570			}
571			fputs(s, stderr);
572			if (s[strlen(s)-1] == '\n') {
573			fflush(stderr);
574			midline = 0;
575			}
576	gregl	3.1	}
577
578
579			quit(code) /* clean up and exit */
580			int code;
581			{
582			if (odev.v.type)
583			dev_close();
584			exit(code);
585			}