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1 <HTML>
2 <HEAD>
3    <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
4    <META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (X11; I; IRIX64 6.4 IP30) [Netscape]">
5    <META NAME="Author" CONTENT="Allen Bierbaum">
6    <META NAME="Description" CONTENT="This file documents the use of input from the users perspective.It also doecuments the use of default devices.">
7    <TITLE>User Input documentation</TITLE>
8 <!-- SGI_COMMENT COSMOCREATE -->
9 <!-- SGI_COMMENT VERSION NUMBER="1.0.2" -->
10 </HEAD>
11 <BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#0000EE" VLINK="#551A8B" ALINK="#FF0000">
12 User Input Documentation
13
14 <P>This document explains how user input and default input devices are
15 handled by the C2Library.
16 <H3>
17 <U>Requirements</U></H3>
18
19 <H4>
20 User must be able to</H4>
21
22 <UL>
23 <LI>
24 Ask for head</LI>
25
26 <LI>
27 Ask for wand</LI>
28
29 <LI>
30 Ask for other default devices</LI>
31
32 <LI>
33 Ask for specific deviecs</LI>
34
35 <LI>
36 Query the device for its data</LI>
37 </UL>
38 The user will call a function like:
39
40 <P>int index = GetDeviceIndex("Device Name");
41
42 <P>The user will actually get an int index that can be used to call:
43 <MENU>
44 <LI>
45 GetPos(int index)</LI>
46
47 <LI>
48 GetAnalog(int index), etc.</LI>
49 </MENU>
50 Keyboard input:
51 <UL>
52 <LI>
53 Should it always be active?</LI>
54
55 <LI>
56 How will applications exit when no keyboard is present?</LI>
57 </UL>
58
59 <H3>
60 <U>Proxy Aliases</U></H3>
61 These are proxy names alias other proxies. The config file has a proxyAlias
62 chunk&nbsp; that defines an alias name to point to a proxy. These chunk
63 sets up an array of indices to be used internally.
64
65 <P>The chunk looks like this:
66 <UL>proxyAlias
67 <UL>aliasName&nbsp; string 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
68 # Name of the alias
69 <BR>proxyPtr chunk 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
70 # Proxy to alias
71 <BR>end</UL>
72 </UL>
73 <B><U>Standard Aliases:</U></B> These are suggested string aliases that
74 should be used in all configs
75 <UL>
76 <LI>
77 C2Head - A positional device for the users head</LI>
78
79 <LI>
80 C2Wand - A positional device for the user wand</LI>
81
82 <LI>
83 C2Glove - A glove device.</LI>
84
85 <LI>
86 C2Digital - A digital device</LI>
87
88 <LI>
89 C2Analog - An analog device</LI>
90
91 <LI>
92 C2Simulator - Positional device for controling simulator window</LI>
93 </UL>
94 These aliases anc then be used in the call to GetDeviceIndex("Device Name").&nbsp;
95 This call looks at the internal default device array.&nbsp; This array
96 contains the indices of the real proxies.&nbsp; The function returns this
97 proxy index.&nbsp; This ability can be used to write programs that can
98 be reconfigured to use other devices without code changes.
99 <BR>&nbsp;
100 <H4>
101 Run-Time changes</H4>
102 To change the configuration of proxy aliases at run-time, a proxyAlias
103 chunk needs to be sent to the inputManager.&nbsp; This will directly tell
104 the input manager how to modify the alias array.
105 <BR>&nbsp;
106 <BR>&nbsp;
107 </BODY>
108 </HTML>
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