1 |
gregl |
3.1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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* Holodeck display process. |
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*/ |
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#include "rholo.h" |
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#include "rhdisp.h" |
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#include "rhdriver.h" |
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#include "selcall.h" |
15 |
gregl |
3.10 |
#include <ctype.h> |
16 |
gregl |
3.1 |
|
17 |
gregl |
3.12 |
#ifndef VIEWHISTLEN |
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#define VIEWHISTLEN 2 /* number of remembered views */ |
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#endif |
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21 |
gregl |
3.1 |
HOLO *hdlist[HDMAX+1]; /* global holodeck list */ |
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23 |
gregl |
3.10 |
char cmdlist[DC_NCMDS][8] = DC_INIT; |
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25 |
gregl |
3.1 |
int imm_mode = 0; /* bundles are being delivered immediately */ |
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char *progname; /* global argv[0] */ |
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29 |
gregl |
3.10 |
FILE *sstdin, *sstdout; /* server's standard input and output */ |
30 |
gregl |
3.1 |
|
31 |
gregl |
3.10 |
#define RDY_SRV 01 |
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#define RDY_DEV 02 |
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#define RDY_SIN 04 |
34 |
gregl |
3.1 |
|
35 |
gregl |
3.10 |
|
36 |
gregl |
3.1 |
main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
40 |
gregl |
3.10 |
extern int eputs(); |
41 |
gregl |
3.3 |
int rdy, inp, res = 0, pause = 0; |
42 |
gregl |
3.1 |
|
43 |
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progname = argv[0]; |
44 |
gregl |
3.10 |
if (argc < 3) |
45 |
gregl |
3.1 |
error(USER, "bad command line arguments"); |
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/* open our device */ |
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dev_open(argv[1]); |
48 |
gregl |
3.10 |
/* 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"); |
54 |
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/* set command error vector */ |
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erract[COMMAND].pf = eputs; |
56 |
gregl |
3.1 |
/* enter main loop */ |
57 |
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do { |
58 |
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rdy = disp_wait(); |
59 |
gregl |
3.10 |
if (rdy & RDY_DEV) { /* user input from driver */ |
60 |
gregl |
3.3 |
inp = dev_input(); |
61 |
gregl |
3.13 |
if (inp & DFL(DC_SETVIEW)) |
62 |
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new_view(&odev.v); |
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if (inp & DFL(DC_GETVIEW)) |
64 |
gregl |
3.10 |
printview(); |
65 |
gregl |
3.13 |
if (inp & DFL(DC_LASTVIEW)) |
66 |
gregl |
3.12 |
new_view(NULL); |
67 |
gregl |
3.13 |
if (inp & DFL(DC_PAUSE)) |
68 |
gregl |
3.3 |
pause = 1; |
69 |
gregl |
3.13 |
if (inp & DFL(DC_RESUME)) { |
70 |
gregl |
3.3 |
serv_request(DR_NOOP, 0, NULL); |
71 |
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pause = 0; |
72 |
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} |
73 |
gregl |
3.13 |
if (inp & DFL(DC_REDRAW)) |
74 |
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imm_mode = beam_sync() > 0; |
75 |
gregl |
3.14 |
if (inp & DFL(DC_KILL)) |
76 |
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serv_request(DR_KILL, 0, NULL); |
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if (inp & DFL(DC_CLOBBER)) |
78 |
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serv_request(DR_CLOBBER, 0, NULL); |
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if (inp & DFL(DC_RESTART)) |
80 |
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serv_request(DR_RESTART, 0, NULL); |
81 |
gregl |
3.13 |
if (inp & DFL(DC_QUIT)) |
82 |
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serv_request(DR_SHUTDOWN, 0, NULL); |
83 |
gregl |
3.3 |
} |
84 |
gregl |
3.10 |
if (rdy & RDY_SIN) /* user input from sstdin */ |
85 |
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switch (usr_input()) { |
86 |
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case DC_PAUSE: |
87 |
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pause = 1; |
88 |
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break; |
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case DC_RESUME: |
90 |
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serv_request(DR_NOOP, 0, NULL); |
91 |
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pause = 0; |
92 |
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break; |
93 |
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} |
94 |
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if (rdy & RDY_SRV) { /* process server result */ |
95 |
gregl |
3.3 |
res = serv_result(); |
96 |
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if (pause && res != DS_SHUTDOWN) { |
97 |
gregl |
3.2 |
serv_request(DR_ATTEN, 0, NULL); |
98 |
gregl |
3.3 |
while ((res = serv_result()) != DS_ACKNOW && |
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res != DS_SHUTDOWN) |
100 |
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; |
101 |
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} |
102 |
gregl |
3.2 |
} |
103 |
gregl |
3.1 |
} while (res != DS_SHUTDOWN); |
104 |
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/* all done */ |
105 |
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quit(0); |
106 |
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} |
107 |
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108 |
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109 |
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int |
110 |
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disp_wait() /* wait for more input */ |
111 |
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{ |
112 |
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fd_set readset, errset; |
113 |
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int flgs; |
114 |
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int n; |
115 |
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register int i; |
116 |
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/* see if we can avoid select call */ |
117 |
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if (imm_mode || stdin->_cnt > 0) |
118 |
gregl |
3.4 |
return(RDY_SRV); |
119 |
gregl |
3.10 |
if (sstdin != NULL && sstdin->_cnt > 0) |
120 |
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return(RDY_SIN); |
121 |
gregl |
3.1 |
if (dev_flush()) |
122 |
gregl |
3.4 |
return(RDY_DEV); |
123 |
gregl |
3.1 |
/* make the call */ |
124 |
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FD_ZERO(&readset); FD_ZERO(&errset); |
125 |
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FD_SET(0, &readset); |
126 |
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FD_SET(0, &errset); |
127 |
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FD_SET(odev.ifd, &readset); |
128 |
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FD_SET(odev.ifd, &errset); |
129 |
gregl |
3.10 |
n = odev.ifd+1; |
130 |
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if (sstdin != NULL) { |
131 |
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FD_SET(fileno(sstdin), &readset); |
132 |
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if (fileno(sstdin) >= n) |
133 |
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n = fileno(sstdin) + 1; |
134 |
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} |
135 |
gregl |
3.1 |
n = select(n, &readset, NULL, &errset, NULL); |
136 |
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if (n < 0) { |
137 |
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if (errno == EINTR) |
138 |
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return(0); |
139 |
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error(SYSTEM, "select call failure in disp_wait"); |
140 |
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} |
141 |
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flgs = 0; /* flag what's ready */ |
142 |
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if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset)) |
143 |
gregl |
3.4 |
flgs |= RDY_SRV; |
144 |
gregl |
3.1 |
if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset)) |
145 |
gregl |
3.4 |
flgs |= RDY_DEV; |
146 |
gregl |
3.10 |
if (sstdin != NULL && FD_ISSET(fileno(sstdin), &readset)) |
147 |
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flgs |= RDY_SIN; |
148 |
gregl |
3.1 |
return(flgs); |
149 |
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} |
150 |
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151 |
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152 |
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add_holo(hdg) /* register a new holodeck section */ |
153 |
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HDGRID *hdg; |
154 |
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{ |
155 |
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VIEW nv; |
156 |
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register int hd; |
157 |
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158 |
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for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++) |
159 |
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; |
160 |
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if (hd >= HDMAX) |
161 |
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error(INTERNAL, "too many holodeck sections in add_holo"); |
162 |
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hdlist[hd] = (HOLO *)malloc(sizeof(HOLO)); |
163 |
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if (hdlist[hd] == NULL) |
164 |
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error(SYSTEM, "out of memory in add_holo"); |
165 |
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bcopy((char *)hdg, (char *)hdlist[hd], sizeof(HDGRID)); |
166 |
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hdcompgrid(hdlist[hd]); |
167 |
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if (hd) |
168 |
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return; |
169 |
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/* set initial viewpoint */ |
170 |
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copystruct(&nv, &odev.v); |
171 |
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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); |
173 |
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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]); |
175 |
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VCOPY(nv.vup, hdlist[0]->xv[2]); |
176 |
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new_view(&nv); |
177 |
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} |
178 |
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179 |
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180 |
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disp_bundle(p) /* display a ray bundle */ |
181 |
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register PACKHEAD *p; |
182 |
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{ |
183 |
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GCOORD gc[2]; |
184 |
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FVECT ro, rd, wp; |
185 |
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double d; |
186 |
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register int i; |
187 |
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/* get beam coordinates */ |
188 |
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if (p->hd < 0 | p->hd >= HDMAX || hdlist[p->hd] == NULL) |
189 |
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error(INTERNAL, "bad holodeck number in disp_bundle"); |
190 |
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if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
191 |
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error(INTERNAL, "bad beam index in disp_bundle"); |
192 |
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/* display each ray */ |
193 |
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for (i = p->nr; i--; ) { |
194 |
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hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r); |
195 |
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d = hddepth(hdlist[p->hd], packra(p)[i].d); |
196 |
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VSUM(wp, ro, rd, d); /* might be behind viewpoint */ |
197 |
gregl |
3.9 |
dev_value(packra(p)[i].v, wp, rd); |
198 |
gregl |
3.1 |
} |
199 |
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} |
200 |
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201 |
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202 |
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new_view(v) /* change view parameters */ |
203 |
gregl |
3.12 |
register VIEW *v; |
204 |
gregl |
3.1 |
{ |
205 |
gregl |
3.12 |
static VIEW viewhist[VIEWHISTLEN]; |
206 |
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static unsigned nhist; |
207 |
gregl |
3.1 |
char *err; |
208 |
gregl |
3.12 |
/* restore previous view? */ |
209 |
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if (v == NULL) { |
210 |
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if (nhist < 2) { |
211 |
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error(COMMAND, "no previous view"); |
212 |
gregl |
3.10 |
return; |
213 |
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} |
214 |
gregl |
3.12 |
nhist--; /* get one before last setting */ |
215 |
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v = viewhist + ((nhist-1)%VIEWHISTLEN); |
216 |
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} else if ((err = setview(v)) != NULL) { |
217 |
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error(COMMAND, err); |
218 |
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return; |
219 |
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} |
220 |
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again: |
221 |
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if (v->type == VT_PAR) { |
222 |
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error(COMMAND, "cannot handle parallel views"); |
223 |
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return; |
224 |
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} |
225 |
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if (!dev_view(v)) /* update display driver */ |
226 |
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goto again; |
227 |
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dev_flush(); /* update screen */ |
228 |
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if (!beam_view(v)) /* update beam list */ |
229 |
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goto again; |
230 |
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/* record new view */ |
231 |
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if (v < viewhist || v >= viewhist+VIEWHISTLEN) { |
232 |
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copystruct(viewhist + (nhist%VIEWHISTLEN), v); |
233 |
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nhist++; |
234 |
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} |
235 |
gregl |
3.10 |
} |
236 |
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237 |
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238 |
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int |
239 |
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usr_input() /* get user input and process it */ |
240 |
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{ |
241 |
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VIEW vparams; |
242 |
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char cmd[128]; |
243 |
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register char *args; |
244 |
gregl |
3.11 |
register int i; |
245 |
gregl |
3.10 |
|
246 |
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if (fgets(cmd, sizeof(cmd), sstdin) == NULL) |
247 |
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return(DC_QUIT); |
248 |
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for (args = cmd; *args && !isspace(*args); args++) |
249 |
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; |
250 |
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while (isspace(*args)) |
251 |
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*args++ = '\0'; |
252 |
|
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if (!*cmd) |
253 |
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return(DC_RESUME); |
254 |
gregl |
3.11 |
if (*args && args[i=strlen(args)-1] == '\n') |
255 |
|
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args[i] = '\0'; |
256 |
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for (i = 0; i < DC_NCMDS; i++) |
257 |
|
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if (!strcmp(cmd, cmdlist[i])) |
258 |
gregl |
3.10 |
break; |
259 |
gregl |
3.11 |
if (i >= DC_NCMDS) { |
260 |
gregl |
3.10 |
sprintf(errmsg, "unknown command: %s", cmd); |
261 |
|
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error(COMMAND, errmsg); |
262 |
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return(-1); |
263 |
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} |
264 |
gregl |
3.11 |
switch (i) { |
265 |
gregl |
3.10 |
case DC_SETVIEW: /* set the view */ |
266 |
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copystruct(&vparams, &odev.v); |
267 |
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if (!sscanview(&vparams, args)) |
268 |
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error(COMMAND, "missing view options"); |
269 |
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else |
270 |
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new_view(&vparams); |
271 |
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break; |
272 |
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case DC_GETVIEW: /* print the current view */ |
273 |
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printview(); |
274 |
gregl |
3.12 |
break; |
275 |
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case DC_LASTVIEW: /* restore previous view */ |
276 |
|
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new_view(NULL); |
277 |
gregl |
3.10 |
break; |
278 |
|
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case DC_PAUSE: /* pause the current calculation */ |
279 |
|
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case DC_RESUME: /* resume the calculation */ |
280 |
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/* handled in main() */ |
281 |
gregl |
3.13 |
break; |
282 |
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case DC_REDRAW: /* redraw from server */ |
283 |
|
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imm_mode = beam_sync() > 0; |
284 |
gregl |
3.14 |
break; |
285 |
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case DC_KILL: /* kill rtrace process(es) */ |
286 |
|
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serv_request(DR_KILL, 0, NULL); |
287 |
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break; |
288 |
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case DC_CLOBBER: /* clobber holodeck */ |
289 |
|
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serv_request(DR_CLOBBER, 0, NULL); |
290 |
|
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break; |
291 |
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case DC_RESTART: /* restart rtrace */ |
292 |
|
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serv_request(DR_RESTART, 0, NULL); |
293 |
gregl |
3.10 |
break; |
294 |
|
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case DC_QUIT: /* quit request */ |
295 |
|
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serv_request(DR_SHUTDOWN, 0, NULL); |
296 |
|
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break; |
297 |
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default: |
298 |
|
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error(CONSISTENCY, "bad command id in usr_input"); |
299 |
|
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} |
300 |
gregl |
3.11 |
return(i); |
301 |
gregl |
3.10 |
} |
302 |
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303 |
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|
304 |
|
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printview() /* print our current view to server stdout */ |
305 |
|
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{ |
306 |
|
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fputs(VIEWSTR, sstdout); |
307 |
|
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fprintview(&odev.v, sstdout); |
308 |
|
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fputc('\n', sstdout); |
309 |
|
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fflush(sstdout); |
310 |
gregl |
3.1 |
} |
311 |
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312 |
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|
313 |
|
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int |
314 |
|
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serv_result() /* get next server result and process it */ |
315 |
|
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{ |
316 |
|
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static char *buf = NULL; |
317 |
|
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static int bufsiz = 0; |
318 |
|
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MSGHEAD msg; |
319 |
|
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int n; |
320 |
|
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/* read message header */ |
321 |
|
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if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1) |
322 |
|
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goto readerr; |
323 |
|
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if (msg.nbytes > 0) { /* get the message body */ |
324 |
|
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if (msg.nbytes > bufsiz) { |
325 |
|
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if (buf == NULL) |
326 |
|
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buf = (char *)malloc(bufsiz=msg.nbytes); |
327 |
|
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else |
328 |
|
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buf = (char *)realloc(buf, bufsiz=msg.nbytes); |
329 |
|
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if (buf == NULL) |
330 |
|
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error(SYSTEM, "out of memory in serv_result"); |
331 |
|
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} |
332 |
|
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if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes) |
333 |
|
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goto readerr; |
334 |
|
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} |
335 |
|
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switch (msg.type) { /* process results */ |
336 |
|
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case DS_BUNDLE: |
337 |
|
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if (msg.nbytes < sizeof(PACKHEAD) || |
338 |
|
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msg.nbytes != packsiz(((PACKHEAD *)buf)->nr)) |
339 |
|
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error(INTERNAL, "bad display packet from server"); |
340 |
|
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disp_bundle((PACKHEAD *)buf); |
341 |
|
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break; |
342 |
|
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case DS_ADDHOLO: |
343 |
|
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if (msg.nbytes != sizeof(HDGRID)) |
344 |
|
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error(INTERNAL, "bad holodeck record from server"); |
345 |
|
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add_holo((HDGRID *)buf); |
346 |
|
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break; |
347 |
|
|
case DS_STARTIMM: |
348 |
|
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case DS_ENDIMM: |
349 |
|
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imm_mode = msg.type==DS_STARTIMM; |
350 |
gregl |
3.7 |
if (msg.type == DS_ENDIMM) |
351 |
|
|
dev_flush(); /* update display NOW */ |
352 |
gregl |
3.1 |
/* fall through */ |
353 |
|
|
case DS_ACKNOW: |
354 |
|
|
case DS_SHUTDOWN: |
355 |
|
|
if (msg.nbytes) { |
356 |
|
|
sprintf(errmsg, |
357 |
|
|
"unexpected body with server message %d", |
358 |
|
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msg.type); |
359 |
|
|
error(INTERNAL, errmsg); |
360 |
|
|
} |
361 |
|
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break; |
362 |
|
|
default: |
363 |
|
|
error(INTERNAL, "unrecognized result from server process"); |
364 |
|
|
} |
365 |
|
|
return(msg.type); /* return message type */ |
366 |
|
|
readerr: |
367 |
|
|
if (feof(stdin)) |
368 |
|
|
error(SYSTEM, "server process died"); |
369 |
|
|
error(SYSTEM, "error reading from server process"); |
370 |
|
|
} |
371 |
|
|
|
372 |
|
|
|
373 |
|
|
serv_request(type, nbytes, p) /* send a request to the server process */ |
374 |
|
|
int type, nbytes; |
375 |
|
|
char *p; |
376 |
|
|
{ |
377 |
|
|
MSGHEAD msg; |
378 |
|
|
int m; |
379 |
|
|
/* get server's attention for big request */ |
380 |
|
|
if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) { |
381 |
|
|
serv_request(DR_ATTEN, 0, NULL); |
382 |
|
|
while ((m = serv_result()) != DS_ACKNOW) |
383 |
|
|
if (m == DS_SHUTDOWN) /* the bugger quit on us */ |
384 |
|
|
quit(0); |
385 |
|
|
} |
386 |
|
|
msg.type = type; /* write and flush the message */ |
387 |
|
|
msg.nbytes = nbytes; |
388 |
|
|
fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout); |
389 |
|
|
if (nbytes > 0) |
390 |
|
|
fwrite(p, 1, nbytes, stdout); |
391 |
|
|
if (fflush(stdout) < 0) |
392 |
|
|
error(SYSTEM, "write error in serv_request"); |
393 |
gregl |
3.2 |
} |
394 |
|
|
|
395 |
|
|
|
396 |
|
|
eputs(s) /* put error message to stderr */ |
397 |
|
|
register char *s; |
398 |
|
|
{ |
399 |
|
|
static int midline = 0; |
400 |
|
|
|
401 |
|
|
if (!*s) |
402 |
|
|
return; |
403 |
|
|
if (!midline++) { /* prepend line with program name */ |
404 |
|
|
fputs(progname, stderr); |
405 |
|
|
fputs(": ", stderr); |
406 |
|
|
} |
407 |
|
|
fputs(s, stderr); |
408 |
|
|
if (s[strlen(s)-1] == '\n') { |
409 |
|
|
fflush(stderr); |
410 |
|
|
midline = 0; |
411 |
|
|
} |
412 |
gregl |
3.1 |
} |
413 |
|
|
|
414 |
|
|
|
415 |
|
|
quit(code) /* clean up and exit */ |
416 |
|
|
int code; |
417 |
|
|
{ |
418 |
|
|
if (odev.v.type) |
419 |
|
|
dev_close(); |
420 |
|
|
exit(code); |
421 |
|
|
} |