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<center>
<h2>
GL4Java / Intro / Purpose</h2></center>
<center>
<h2>
Accessing Native OpenGL From The Java Side</h2></center>
<ul>
<li>
OpenGL is the industry standard 3D API originally created by SGI (->
<a href="http://www.opengl.org/">http://www.opengl.org</a>
).</li>
<ul>
<br>OpenGL is known as the standard 3D API for serious CAD development,
creation & visualisation.
<p>Today, also games does use OpenGL as its underlying 3D renderer machine,
<br>because of its reliability and the existing consumer graphic cards
with OpenGL hardware acceleration.
<p>The benefits of OpenGL are described under:
<a href="http://www.opengl.org/About/About.html">http://www.opengl.org/About/About.html</a>
.
<br> </ul>
<li>
GL4Java adds native OpenGL access to the Java Virtual Machine (JVM).</li>
<ul>
<br>Applications as well as Applets can use OpenGL,
<br>if the GL4Java-Extension is installed on the users machine.
<p>Currently the following JVM's are supported
<br>
<ul>
<li>
Sun's JVM (all types of: Blackdown, IBM, ...)</li>
<ul>
<li>
GNU/Linux</li>
<li>
Other Unices (Solaris, Irix, ..)</li>
<li>
Win9x, WinNT, ...</li>
<li>
Macintosh ...</li>
</ul>
<li>
MS-JVM (build >=3186 )</li>
</ul>
<p><br>The Installation can be made via the GL4Java-Installer,
<br>which can be start from a Web-Browser and installs GL4Java on the fly
from the Web,
<br>or runs as a standalone application from your local harddisk.
<br> </ul>
<li>
The performance of GL4Java applications depends on:</li>
</ul>
<ul>
<ul>
<li>
The underlying JVM implementation (Native Threads/JIT/Hotspot/...)</li>
<li>
The underlying OpenGL implementation (Hardware Accelerated vs Software
Rendering)</li>
</ul>
<br>
<ul><font size=-1>With new world JVM's and OpenGL graphic cards and their
libraries,</font>
<br><font size=-1>you can expect a very usable performance - nearly high
as the native applications.</font>
<br><font size=-1>The biggest performance difference is the algorythm part</font>
<br><font size=-1>of your GL4Java application, which you might use and
need for geometric calculations,</font>
<br><font size=-1>game logic, etc. The OpenGL glue in the GL4Java-Extension,
which makes the connection</font>
<br><font size=-1>to the native OpenGL library, is as small as it can be
!</font></ul>
</ul>
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