| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */
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| 2 |
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| 3 |
#ifndef lint
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| 4 |
static char SCCSid[] = "$SunId$ SGI";
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| 5 |
#endif
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| 6 |
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| 7 |
/*
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| 8 |
* Holodeck display process.
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| 9 |
*/
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| 10 |
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| 11 |
#include "rholo.h"
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| 12 |
#include "rhdisp.h"
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| 13 |
#include "rhdriver.h"
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| 14 |
#include "selcall.h"
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| 15 |
#include <ctype.h>
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| 17 |
#ifndef VIEWHISTLEN
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| 18 |
#define VIEWHISTLEN 4 /* number of remembered views */
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| 19 |
#endif
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| 21 |
HOLO *hdlist[HDMAX+1]; /* global holodeck list */
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| 23 |
char cmdlist[DC_NCMDS][8] = DC_INIT;
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| 24 |
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| 25 |
int imm_mode = 0; /* bundles are being delivered immediately */
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| 26 |
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| 27 |
int do_outside = 0; /* render from outside sections */
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| 28 |
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| 29 |
char *progname; /* global argv[0] */
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| 30 |
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| 31 |
FILE *sstdin, *sstdout; /* server's standard input and output */
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| 33 |
#ifdef DEBUG
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| 34 |
#include <sys/types.h>
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extern time_t time();
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| 36 |
static time_t tmodesw;
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| 37 |
static time_t timm, tadd;
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| 38 |
static long nimmrays, naddrays;
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| 39 |
#endif
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| 40 |
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| 41 |
#define RDY_SRV 01
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| 42 |
#define RDY_DEV 02
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#define RDY_SIN 04
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main(argc, argv)
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int argc;
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| 48 |
char *argv[];
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| 49 |
{
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| 50 |
extern int eputs();
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| 51 |
int rdy, inp, res = 0, pause = 0;
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progname = argv[0];
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| 54 |
if (argc < 3)
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error(USER, "bad command line arguments");
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/* open our device */
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dev_open(argv[1]);
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/* open server process i/o */
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sstdout = fdopen(atoi(argv[2]), "w");
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if (argc < 4 || (inp = atoi(argv[3])) < 0)
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sstdin = NULL;
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else
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sstdin = fdopen(inp, "r");
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/* set command error vector */
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erract[COMMAND].pf = eputs;
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#ifdef DEBUG
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tmodesw = time(NULL);
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#endif
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/* enter main loop */
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do {
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rdy = disp_wait();
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if (rdy & RDY_SRV) { /* process server result */
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res = serv_result();
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if (pause && res != DS_SHUTDOWN) {
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serv_request(DR_ATTEN, 0, NULL);
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while ((res = serv_result()) != DS_ACKNOW &&
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res != DS_SHUTDOWN)
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;
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}
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}
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if (rdy & RDY_DEV) { /* user input from driver */
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inp = dev_input();
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if (inp & DFL(DC_SETVIEW))
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new_view(&odev.v);
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if (inp & DFL(DC_GETVIEW))
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printview();
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if (inp & DFL(DC_LASTVIEW))
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new_view(NULL);
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if (inp & DFL(DC_RESUME)) {
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serv_request(DR_NOOP, 0, NULL);
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pause = 0;
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}
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if (inp & DFL(DC_PAUSE))
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pause = 1;
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if (inp & DFL(DC_REDRAW))
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imm_mode = beam_sync() > 0;
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if (inp & DFL(DC_KILL)) {
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serv_request(DR_KILL, 0, NULL);
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pause = 0;
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}
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if (inp & DFL(DC_CLOBBER))
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serv_request(DR_CLOBBER, 0, NULL);
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if (inp & DFL(DC_RESTART)) {
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serv_request(DR_RESTART, 0, NULL);
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pause = 0;
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}
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if (inp & DFL(DC_QUIT))
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serv_request(DR_SHUTDOWN, 0, NULL);
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}
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if (rdy & RDY_SIN) /* user input from sstdin */
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switch (usr_input()) {
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case DC_PAUSE:
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pause = 1;
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break;
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case DC_RESUME:
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serv_request(DR_NOOP, 0, NULL);
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/* fall through */
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case DC_KILL:
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case DC_RESTART:
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pause = 0;
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break;
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}
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} while (res != DS_SHUTDOWN);
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#ifdef DEBUG
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if (timm && nimmrays)
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fprintf(stderr,
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"%s: %.1f rays recalled/second (%ld rays total)\n",
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progname, (double)nimmrays/timm, nimmrays);
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if (tadd && naddrays)
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fprintf(stderr,
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"%s: %.1f rays calculated/second (%ld rays total)\n",
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progname, (double)naddrays/tadd, naddrays);
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#endif
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/* all done */
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quit(0);
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}
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int
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disp_wait() /* wait for more input */
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{
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fd_set readset, errset;
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int flgs;
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int n;
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register int i;
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/* see if we can avoid select call */
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if (imm_mode || stdin->_cnt > 0)
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return(RDY_SRV);
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if (sstdin != NULL && sstdin->_cnt > 0)
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return(RDY_SIN);
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if (dev_flush())
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return(RDY_DEV);
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/* make the call */
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FD_ZERO(&readset); FD_ZERO(&errset);
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FD_SET(0, &readset);
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FD_SET(0, &errset);
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FD_SET(odev.ifd, &readset);
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FD_SET(odev.ifd, &errset);
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n = odev.ifd+1;
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if (sstdin != NULL) {
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FD_SET(fileno(sstdin), &readset);
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FD_SET(fileno(sstdin), &errset);
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if (fileno(sstdin) >= n)
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n = fileno(sstdin) + 1;
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}
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n = select(n, &readset, NULL, &errset, NULL);
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if (n < 0) {
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if (errno == EINTR)
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return(0);
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error(SYSTEM, "select call failure in disp_wait");
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}
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flgs = 0; /* flag what's ready */
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if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset))
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flgs |= RDY_SRV;
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if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset))
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flgs |= RDY_DEV;
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if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) ||
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FD_ISSET(fileno(sstdin), &errset)))
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flgs |= RDY_SIN;
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return(flgs);
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}
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| 183 |
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| 184 |
add_holo(hdg) /* register a new holodeck section */
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HDGRID *hdg;
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{
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| 187 |
VIEW nv;
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| 188 |
double d;
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| 189 |
register int hd;
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| 191 |
for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++)
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;
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if (hd >= HDMAX)
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error(INTERNAL, "too many holodeck sections in add_holo");
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hdlist[hd] = (HOLO *)malloc(sizeof(HOLO));
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| 196 |
if (hdlist[hd] == NULL)
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error(SYSTEM, "out of memory in add_holo");
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bcopy((char *)hdg, (char *)hdlist[hd], sizeof(HDGRID));
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hdcompgrid(hdlist[hd]);
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if (hd)
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return;
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/* set initial viewpoint */
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copystruct(&nv, &odev.v);
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VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5);
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VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5);
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VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5);
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fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]);
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VCOPY(nv.vup, hdlist[0]->xv[2]);
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if (do_outside) {
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normalize(nv.vdir);
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d = VLEN(hdlist[0]->xv[1]);
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| 212 |
d += VLEN(hdlist[0]->xv[2]);
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VSUM(nv.vp, nv.vp, nv.vdir, -d);
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| 214 |
}
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| 215 |
new_view(&nv);
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}
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| 218 |
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disp_bundle(p) /* display a ray bundle */
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| 220 |
register PACKHEAD *p;
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{
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GCOORD gc[2];
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| 223 |
FVECT ro, rd, wp;
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| 224 |
double d;
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| 225 |
register int i;
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| 226 |
/* get beam coordinates */
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if (p->hd < 0 | p->hd >= HDMAX || hdlist[p->hd] == NULL)
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| 228 |
error(INTERNAL, "bad holodeck number in disp_bundle");
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| 229 |
if (!hdbcoord(gc, hdlist[p->hd], p->bi))
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| 230 |
error(INTERNAL, "bad beam index in disp_bundle");
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/* display each ray */
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| 232 |
for (i = p->nr; i--; ) {
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| 233 |
hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r);
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d = hddepth(hdlist[p->hd], packra(p)[i].d);
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VSUM(wp, ro, rd, d); /* might be behind viewpoint */
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| 236 |
dev_value(packra(p)[i].v, wp, rd);
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}
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| 238 |
#ifdef DEBUG
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| 239 |
if (imm_mode) nimmrays += p->nr;
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| 240 |
else naddrays += p->nr;
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| 241 |
#endif
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| 242 |
}
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| 243 |
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| 244 |
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| 245 |
new_view(v) /* change view parameters */
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| 246 |
register VIEW *v;
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| 247 |
{
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| 248 |
static VIEW viewhist[VIEWHISTLEN];
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| 249 |
static unsigned nhist;
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| 250 |
char *err;
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| 251 |
/* restore previous view? */
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| 252 |
if (v == NULL) {
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| 253 |
if (nhist > 1) /* get one before last setting */
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| 254 |
nhist--;
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| 255 |
else /* else go to end of list */
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| 256 |
while (nhist < VIEWHISTLEN && viewhist[nhist].type)
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| 257 |
nhist++;
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| 258 |
v = viewhist + ((nhist-1)%VIEWHISTLEN);
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| 259 |
} else
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| 260 |
again:
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| 261 |
if ((err = setview(v)) != NULL) {
|
| 262 |
error(COMMAND, err);
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| 263 |
return;
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| 264 |
}
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| 265 |
if (v->type == VT_PAR) {
|
| 266 |
error(COMMAND, "cannot handle parallel views");
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| 267 |
return;
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| 268 |
}
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| 269 |
if (!dev_view(v)) /* update display driver */
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| 270 |
goto again;
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| 271 |
dev_flush(); /* update screen */
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| 272 |
if (!beam_view(v)) /* update beam list */
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| 273 |
goto again;
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| 274 |
/* record new view */
|
| 275 |
if (v < viewhist || v >= viewhist+VIEWHISTLEN) {
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| 276 |
copystruct(viewhist + (nhist%VIEWHISTLEN), v);
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| 277 |
nhist++;
|
| 278 |
}
|
| 279 |
}
|
| 280 |
|
| 281 |
|
| 282 |
int
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| 283 |
usr_input() /* get user input and process it */
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| 284 |
{
|
| 285 |
VIEW vparams;
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| 286 |
char cmd[256];
|
| 287 |
register char *args;
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| 288 |
register int i;
|
| 289 |
|
| 290 |
if (fgets(cmd, sizeof(cmd), sstdin) == NULL) {
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| 291 |
fclose(sstdin);
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| 292 |
sstdin = NULL;
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| 293 |
return(0);
|
| 294 |
}
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| 295 |
for (args = cmd; *args && !isspace(*args); args++)
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| 296 |
;
|
| 297 |
while (isspace(*args))
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| 298 |
*args++ = '\0';
|
| 299 |
if (!*cmd)
|
| 300 |
return(DC_RESUME);
|
| 301 |
if (*args && args[i=strlen(args)-1] == '\n')
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| 302 |
args[i] = '\0';
|
| 303 |
for (i = 0; i < DC_NCMDS; i++)
|
| 304 |
if (!strcmp(cmd, cmdlist[i]))
|
| 305 |
break;
|
| 306 |
if (i >= DC_NCMDS) {
|
| 307 |
sprintf(errmsg, "unknown command: %s", cmd);
|
| 308 |
error(COMMAND, errmsg);
|
| 309 |
return(-1);
|
| 310 |
}
|
| 311 |
switch (i) {
|
| 312 |
case DC_SETVIEW: /* set the view */
|
| 313 |
copystruct(&vparams, &odev.v);
|
| 314 |
if (!sscanview(&vparams, args))
|
| 315 |
error(COMMAND, "missing view options");
|
| 316 |
else
|
| 317 |
new_view(&vparams);
|
| 318 |
break;
|
| 319 |
case DC_GETVIEW: /* print the current view */
|
| 320 |
printview();
|
| 321 |
break;
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| 322 |
case DC_LASTVIEW: /* restore previous view */
|
| 323 |
new_view(NULL);
|
| 324 |
break;
|
| 325 |
case DC_PAUSE: /* pause the current calculation */
|
| 326 |
case DC_RESUME: /* resume the calculation */
|
| 327 |
/* handled in main() */
|
| 328 |
break;
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| 329 |
case DC_REDRAW: /* redraw from server */
|
| 330 |
imm_mode = beam_sync() > 0;
|
| 331 |
dev_clear();
|
| 332 |
break;
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| 333 |
case DC_KILL: /* kill rtrace process(es) */
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| 334 |
serv_request(DR_KILL, 0, NULL);
|
| 335 |
break;
|
| 336 |
case DC_CLOBBER: /* clobber holodeck */
|
| 337 |
serv_request(DR_CLOBBER, 0, NULL);
|
| 338 |
break;
|
| 339 |
case DC_RESTART: /* restart rtrace */
|
| 340 |
serv_request(DR_RESTART, 0, NULL);
|
| 341 |
break;
|
| 342 |
case DC_QUIT: /* quit request */
|
| 343 |
serv_request(DR_SHUTDOWN, 0, NULL);
|
| 344 |
break;
|
| 345 |
default:
|
| 346 |
error(CONSISTENCY, "bad command id in usr_input");
|
| 347 |
}
|
| 348 |
return(i);
|
| 349 |
}
|
| 350 |
|
| 351 |
|
| 352 |
printview() /* print our current view to server stdout */
|
| 353 |
{
|
| 354 |
fputs(VIEWSTR, sstdout);
|
| 355 |
fprintview(&odev.v, sstdout);
|
| 356 |
fputc('\n', sstdout);
|
| 357 |
fflush(sstdout);
|
| 358 |
}
|
| 359 |
|
| 360 |
|
| 361 |
int
|
| 362 |
serv_result() /* get next server result and process it */
|
| 363 |
{
|
| 364 |
static char *buf = NULL;
|
| 365 |
static int bufsiz = 0;
|
| 366 |
MSGHEAD msg;
|
| 367 |
int n;
|
| 368 |
/* read message header */
|
| 369 |
if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1)
|
| 370 |
goto readerr;
|
| 371 |
if (msg.nbytes > 0) { /* get the message body */
|
| 372 |
if (msg.nbytes > bufsiz) {
|
| 373 |
if (buf == NULL)
|
| 374 |
buf = (char *)malloc(bufsiz=msg.nbytes);
|
| 375 |
else
|
| 376 |
buf = (char *)realloc(buf, bufsiz=msg.nbytes);
|
| 377 |
if (buf == NULL)
|
| 378 |
error(SYSTEM, "out of memory in serv_result");
|
| 379 |
}
|
| 380 |
if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes)
|
| 381 |
goto readerr;
|
| 382 |
}
|
| 383 |
switch (msg.type) { /* process results */
|
| 384 |
case DS_BUNDLE:
|
| 385 |
if (msg.nbytes < sizeof(PACKHEAD) ||
|
| 386 |
msg.nbytes != packsiz(((PACKHEAD *)buf)->nr))
|
| 387 |
error(INTERNAL, "bad display packet from server");
|
| 388 |
disp_bundle((PACKHEAD *)buf);
|
| 389 |
break;
|
| 390 |
case DS_ADDHOLO:
|
| 391 |
if (msg.nbytes != sizeof(HDGRID))
|
| 392 |
error(INTERNAL, "bad holodeck record from server");
|
| 393 |
add_holo((HDGRID *)buf);
|
| 394 |
break;
|
| 395 |
case DS_OUTSECT:
|
| 396 |
do_outside = 1;
|
| 397 |
break;
|
| 398 |
case DS_STARTIMM:
|
| 399 |
case DS_ENDIMM:
|
| 400 |
#ifdef DEBUG
|
| 401 |
if (imm_mode != (msg.type==DS_STARTIMM)) {
|
| 402 |
time_t tnow = time(NULL);
|
| 403 |
if (imm_mode) timm += tnow - tmodesw;
|
| 404 |
else tadd += tnow - tmodesw;
|
| 405 |
tmodesw = tnow;
|
| 406 |
}
|
| 407 |
#endif
|
| 408 |
imm_mode = msg.type==DS_STARTIMM;
|
| 409 |
/* fall through */
|
| 410 |
case DS_ACKNOW:
|
| 411 |
case DS_SHUTDOWN:
|
| 412 |
if (msg.nbytes) {
|
| 413 |
sprintf(errmsg,
|
| 414 |
"unexpected body with server message %d",
|
| 415 |
msg.type);
|
| 416 |
error(INTERNAL, errmsg);
|
| 417 |
}
|
| 418 |
break;
|
| 419 |
default:
|
| 420 |
error(INTERNAL, "unrecognized result from server process");
|
| 421 |
}
|
| 422 |
return(msg.type); /* return message type */
|
| 423 |
readerr:
|
| 424 |
if (feof(stdin))
|
| 425 |
error(SYSTEM, "server process died");
|
| 426 |
error(SYSTEM, "error reading from server process");
|
| 427 |
}
|
| 428 |
|
| 429 |
|
| 430 |
serv_request(type, nbytes, p) /* send a request to the server process */
|
| 431 |
int type, nbytes;
|
| 432 |
char *p;
|
| 433 |
{
|
| 434 |
MSGHEAD msg;
|
| 435 |
int m;
|
| 436 |
/* get server's attention for big request */
|
| 437 |
if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) {
|
| 438 |
serv_request(DR_ATTEN, 0, NULL);
|
| 439 |
while ((m = serv_result()) != DS_ACKNOW)
|
| 440 |
if (m == DS_SHUTDOWN) /* the bugger quit on us */
|
| 441 |
quit(0);
|
| 442 |
}
|
| 443 |
msg.type = type; /* write and flush the message */
|
| 444 |
msg.nbytes = nbytes;
|
| 445 |
fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout);
|
| 446 |
if (nbytes > 0)
|
| 447 |
fwrite(p, 1, nbytes, stdout);
|
| 448 |
if (fflush(stdout) < 0)
|
| 449 |
error(SYSTEM, "write error in serv_request");
|
| 450 |
}
|
| 451 |
|
| 452 |
|
| 453 |
eputs(s) /* put error message to stderr */
|
| 454 |
register char *s;
|
| 455 |
{
|
| 456 |
static int midline = 0;
|
| 457 |
|
| 458 |
if (!*s)
|
| 459 |
return;
|
| 460 |
if (!midline++) { /* prepend line with program name */
|
| 461 |
fputs(progname, stderr);
|
| 462 |
fputs(": ", stderr);
|
| 463 |
}
|
| 464 |
fputs(s, stderr);
|
| 465 |
if (s[strlen(s)-1] == '\n') {
|
| 466 |
fflush(stderr);
|
| 467 |
midline = 0;
|
| 468 |
}
|
| 469 |
}
|
| 470 |
|
| 471 |
|
| 472 |
quit(code) /* clean up and exit */
|
| 473 |
int code;
|
| 474 |
{
|
| 475 |
if (odev.v.type)
|
| 476 |
dev_close();
|
| 477 |
exit(code);
|
| 478 |
}
|
