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root/radiance/ray/src/hd/rhdisp.h
Revision: 3.12
Committed: Tue Nov 24 17:05:35 1998 UTC (26 years ago) by gwlarson
Content type: text/plain
Branch: MAIN
Changes since 3.11: +2 -1 lines
Log Message:
added eyepoint vicinity restriction for interactive samples

File Contents

# Content
1 /* Copyright (c) 1998 Silicon Graphics, Inc. */
2
3 /* SCCSid "$SunId$ SGI" */
4
5 /*
6 * Header for holodeck display drivers.
7 */
8
9 /* display requests */
10 #define DR_NOOP 0 /* to release from vain DR_ATTEN */
11 #define DR_BUNDLE 1 /* lone bundle request */
12 #define DR_ATTEN 2 /* request for attention */
13 #define DR_SHUTDOWN 3 /* shutdown request */
14 #define DR_NEWSET 4 /* new bundle set */
15 #define DR_ADDSET 5 /* add to current set */
16 #define DR_ADJSET 6 /* adjust set quantities */
17 #define DR_DELSET 7 /* delete from current set */
18 #define DR_KILL 8 /* kill rtrace process(es) */
19 #define DR_RESTART 9 /* restart rtrace */
20 #define DR_CLOBBER 10 /* clobber holodeck */
21 #define DR_VIEWPOINT 11 /* set desired eye position */
22
23 /* server responses */
24 #define DS_BUNDLE 32 /* computed bundle */
25 #define DS_ACKNOW 33 /* acknowledge request for attention */
26 #define DS_SHUTDOWN 34 /* end process and close connection */
27 #define DS_ADDHOLO 35 /* register new holodeck */
28 #define DS_STARTIMM 36 /* begin immediate bundle set */
29 #define DS_ENDIMM 37 /* end immediate bundle set */
30 #define DS_OUTSECT 38 /* render from outside sections */
31 #define DS_EYESEP 39 /* eye separation distance */
32
33 /*
34 * Normally, the server channel has priority, with the display process
35 * checking it frequently for new data. However, when the display process
36 * makes a request for attention (DR_ATTEN), the server will finish its
37 * current operations and flush its buffers, sending an acknowledge
38 * message (DS_ACKNOW) when it's done. This then allows the
39 * display process to send a long request to the holodeck server.
40 * Priority returns to normal after the following request.
41 */
42
43 #ifndef BIGREQSIZ
44 #define BIGREQSIZ 512 /* big request size (bytes) */
45 #endif
46
47 typedef struct {
48 int2 type; /* message type */
49 int4 nbytes; /* number of additional bytes */
50 } MSGHEAD; /* message head */
51
52 /*
53 * The display process is started with three arguments. The first argument
54 * is the short name of the holodeck file, appropriate for window naming, etc.
55 * The second and third arguments are the file descriptor numbers assigned to
56 * the server's standard output and input, respectively. The stdin and stdout
57 * of the display process are used for normal communication with the server,
58 * and are connected to pipes going each way. It is entirely appropriate
59 * for the display process to borrow the server's stdin and stdout for reading
60 * and writing user commands from the list in rhdriver.h. If standard input
61 * is not available for reading, then a descriptor of -1 will be passed.
62 * The standard output will always be available for writing, though it
63 * may go to /dev/null.
64 */