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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (X11; U; Linux 2.4.0-test4 i686) [Netscape]">
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<body text="#000000" bgcolor="#E6E6FF" link="#0000EF" vlink="#51188E" alink="#FF0000">
<center>
<h2>
GL4Java / Intro / Motivation</h2></center>
<center>
<h2>
3D in Java Applications/Applets/WebSites</h2></center>
<ul>
<li>
Todays usage of 3D in serious applications, as well as in games and web
pages is rapidly growing.</li>
<li>
Many existing technologies exits for using 3D in the Web:</li>
<ul>
<li>
Metastream ( -> <a href="http://www.metastream.com">http://www.metastream.com
</a>)</li>
</ul>
<ul>
<br>A 3D Object visualisation toolkit / viewer !
<br>Metastream objects can be rotated, zoomed and moved by the user/viewer.
<br>Further interactions are not foreseen.
<br>Big points are:
<ul>
<ul>
<li>
High compression rate of the image data</li>
<li>
Integrates perfect in HTML pages (background, shadows, ...)</li>
<li>
High quality texture mapping</li>
</ul>
</ul>
</ul>
</ul>
<ul>
<ul>
<li>
VRML (1.0-97), X3D (-> <a href="http://www.web3d.org">http://www.web3d.org</a>
)</li>
<ul>
<li>
Scene-Graph organisation / structure</li>
<li>
Interaction / Manipulation via:</li>
<ul>
<li>
Interpolatiors</li>
<li>
Timers</li>
<li>
Sensors (Collision, Proximity, Time, Touch, Visibility, ...)</li>
<li>
Java Interface</li>
</ul>
</ul>
A VRML World can interactive, so you can walk around and have some actions.
<br>The World itself, inclusive the interaction codes can resides within
one compressed VRML file.
<br>Many current browsers usually have an VRML viewer, but as a restriction,
<br>the GNU/Linux machines are not supported by default.
<br>
<li>
Java3D ( -> <a href="http://www.javasoft.com/products/java-media/3D/index.html">http://www.javasoft.com/products/java-media/3D/index.html
)</a></li>
</ul>
</ul>
<ul>
<ul>Java3D is a high level 3D API for Java. It may use OpenGL, Direct3D
or anything else.
<br>Many features and algorythms of Java3D are implemented in Java itself,
<br>so the performance is not comparable with a native implementation which
may also
<br>include geometric hardware unit.
<br>Java3D has a VRML reader/writer, and like VRML, a 3D scene-graph API
!</ul>
</ul>
<ul>
<ul>
<li>
OpenGL language mappings for Java</li>
</ul>
</ul>
<ul>
<ul>Like GL4Java, there exists many OpenGL language mappings for Java (
-> <a href="historie.html">historie </a>) !
<p>All features of the OpenGL language and the Java language are combined
in one solution:
<ul>
<ul>
<li>
OpenGL's industry standard</li>
<li>
Using todays hardware accelerated graphic cards techniques directly</li>
<li>
Having platform independed high perfomance 3D solutions</li>
<li>
Combining Java's usability and its high amount of API's with 3D</li>
</ul>
</ul>
</ul>
</ul>
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