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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<!--Converted with LaTeX2HTML 98.1 release (February 19th, 1998)
originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds
* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
* with significant contributions from:
Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
<HTML>
<HEAD>
<TITLE>Introduction</TITLE>
<META NAME="description" CONTENT="Introduction">
<META NAME="keywords" CONTENT="vgui_ref_manual">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<LINK REL="STYLESHEET" HREF="vgui_ref_manual.css">
<LINK REL="next" HREF="node3.html">
<LINK REL="previous" HREF="node1.html">
<LINK REL="up" HREF="vgui_ref_manual.html">
<LINK REL="next" HREF="node3.html">
</HEAD>
<BODY >
<!--Navigation Panel-->
<A NAME="tex2html69"
HREF="node3.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
SRC="/usr/local/share/latex2html/icons.gif/next_motif.gif"></A>
<A NAME="tex2html66"
HREF="vgui_ref_manual.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
SRC="/usr/local/share/latex2html/icons.gif/up_motif.gif"></A>
<A NAME="tex2html60"
HREF="node1.html">
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SRC="/usr/local/share/latex2html/icons.gif/previous_motif.gif"></A>
<A NAME="tex2html68"
HREF="node1.html">
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents"
SRC="/usr/local/share/latex2html/icons.gif/contents_motif.gif"></A>
<BR>
<B> Next:</B> <A NAME="tex2html70"
HREF="node3.html">Tableaux</A>
<B> Up:</B> <A NAME="tex2html67"
HREF="vgui_ref_manual.html">VGUI Reference Manual</A>
<B> Previous:</B> <A NAME="tex2html61"
HREF="node1.html">Contents</A>
<BR>
<BR>
<!--End of Navigation Panel-->
<H1><A NAME="SECTION00200000000000000000">
Introduction</A>
</H1>
<P>
This document describes VGUI, a library that provides 2D and 3D drawing in a way
that is both simple and powerful. The basic design goals are:
<UL>
<LI>Provide drawing of images and geometric primitives using OpenGL,
in a platform independent manner.
<LI>Define the handling of user events such as keypresses and mouse
movements.
<LI>Do *not* deal with widgets (buttons, sliders, menus etc), but
instead provide a single simple interface to whatever widget
toolkit the user chooses. Current interfaces include ones to GTK, FLTK,
glut, and glX.
<LI>OpenGL should be usable ``raw'', without any special wrapping by the
library, so that existing documentation is used to best advantage.
</UL>
The basic concept in the new GUI is that the user has access to a rectangular area
(or areas) of the screen, on which OpenGL may be used to draw and from
which events are received. Such an area is called a <I>tableau</I>.
Once-off adaptor code is provided that plugs a tableau into any supported GUI toolkit.
<P>
<BR><HR>
<ADDRESS>
<I>Target Junior User</I>
<BR><I>2000-10-31</I>
</ADDRESS>
</BODY>
</HTML>