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5	<TITLE>Technology</TITLE>
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30	<P>The development of next generation <B>Realtime 3D Libraries</B> is the agenda of the <I>GameTools Project (GTP)</I>, an EU project from the <A HREF="http://www.cordis.lu/ist/">6th Framework Programme</A>. The GTP pushes the envelope in the fields of: </P>
31	<UL STYLE="list-style-type: square;">
32	<LI><B><A HREF="#Geometry" TARGET="body">Geometry</A></B></LI>
33	<LI><B><A HREF="#Visibility" TARGET="body">Visibility</A></B></LI>
34	<LI><B><A HREF="#GlobalIllumination" TARGET="body">Global Illumination</A></B></LI>
35	</UL>
36	<P STYLE="list-style-type: none; text-align: left;">The GTP libraries are bein<SPAN STYLE="font-family: 'Times New Roman', Times, Serif;"></SPAN>g developed for next generation <B>PC hardware</B>, with videogame consoles - <BR><B>PS2, XBox, PS3, XBox 360</B> - planned as additional hardware platforms. <BR> </P>
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46	<P><B><SPAN STYLE="font-size: 16pt; color: rgb(51,102,204);"><A NAME="Geometry"></A>GEOMETRY</SPAN></B></P>
47	<P><B>Continous Multiresolution Models</B> are a <B>LOD (level of detail) technique</B> in computer graphics which addresses the problem that scenes contain <B>too much geometry</B> when all of the visible objects are rendered at their full geometric resolution. While algorithms along that line have long been available, most modern game/3D-engines implement the much simpler technique of discrete LODs instead. Discrete LOD techniques are widely known for the annoying visible artifacts they produce at the moment the switch between the different resolution models occurs, a drawback unfit for the visual quality of the next generation of 3D/game applications.</P>
48	<P>The <B>GTP GeometryLib</B> supplies a <B>Multiresolution LOD Solution</B> which addresses the shortcomings of previous approaches by giving developers access to a complete package of solid technology which supplies:</P>
49	<OL>
50	<LI>A <B>fast image based simplification algorithm</B> to efficiently create high quality MLODs without human intervention.</LI>
51	<LI><B>Multiresolution triangle strip generation</B> taking into account <B>topology</B> and <B>texture</B> of the base model.<BR>Triangle strips are the most efficient way to overcome the bandwidth bottleneck between the main processor and memory on modern high performance graphic cards, thereby vastly speeding up the rendering process.</LI>
52	<LI>A <B>memory & runtime efficient compressed multiresolution mesh format</B> that contains triangle strip information, avoiding the need for costly on-the-fly tristrip generation.</LI>
53	<LI>A new multiresolution model <B>specially fitted for plants</B> allowing for an <B>incredible amount of close up detail</B> for e.g. leaves, <BR>while at the same time supplying simplified representationions for the <B>fast rendering of objects</B> which are <B>further away</B>.</LI>
54	</OL>
55	<P>
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62	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild2" HEIGHT=200 WIDTH=170 SRC="../assets/images/autogen/a_tree1_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="tree-autumn" TITLE="tree-autumn"></A></P>
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65	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild4" HEIGHT=200 WIDTH=333 SRC="../assets/images/autogen/a_tree-close_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="tree-close" TITLE="tree-close"></A></P>
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68	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild3" HEIGHT=200 WIDTH=215 SRC="../assets/images/autogen/a_horse_LOD0_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="horse-LOD0" TITLE="horse-LOD0"></A></P>
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85	<P><B><SPAN STYLE="font-size: 16pt; color: rgb(51,102,204);"><A NAME="Visibility"></A>VISIBILITY</SPAN></B></P>
86	<P>In computer graphics, <B>Visibility</B> deals with the problem of rendering faster by rendering only the objects of the scene that can be seen.<BR>Existing solutions along that line employed in modern day 3D/game-engines are mostly based either on <B>Portals</B> or on <B>Quake style PVS</B> (potentially visible set). While these approaches have been successfully employed in commercial products for years, they nonetheless have considerable drawbacks: </P>
87	<OL>
88	<LI>Both approaches are <I>not suited for outdoor scenes</I> (except scenes which are technically indoor-scenes).</LI>
89	<LI>It is <I>hard to automatically place portals efficiently</I>, so it normally has to be done by hand.</LI>
90	<LI><I>Portals</I> are by nature a very <I>conservative visibility approximation</I>.</LI>
91	<LI><I>Portals</I> are <I>not suited for dynamic occluders</I>.</LI>
92	<LI>For maximum efficiency <I>Quake style PVS </I>is usually done on a scene<I> stored in a BSP tree</I>, which, amongst other drawbacks, is a scene data structure <I>not well suited for dynamically changing scenes</I>.</LI>
93	<LI><I>Quake style PVS</I> precalculation can take prohibitively long.</LI>
94	</OL>
95	<P STYLE="margin-top: 6pt;">The <B>GTP VisibilityLib</B> will overcome these problems with a 2-phase strategy: </P>
96	<OL>
97	<LI>A solution which supplies <B>precalculated visibility</B> based on <B>modern visibility research</B>, also suited for <B>outdoor scenes</B>.</LI>
98	<LI>A solution which efficiently employs <B>modern day graphic hardware</B> to deliver <B>on-the-fly visibility</B> with <B>minimal overhead</B>.</LI>
99	</OL>
100	<P> Both solutions work best when used together, but can also be employed independently from one another, as to best suit the 3D/game engine in use.</P>
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108	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild5" HEIGHT=200 WIDTH=266 SRC="../assets/images/autogen/a_city_highestres_noseam_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="city_highestres_noseam" TITLE="city_highestres_noseam"></A></P>
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111	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild6" HEIGHT=200 WIDTH=266 SRC="../assets/images/autogen/a_overview_highestres_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="overview_highestres" TITLE="overview_highestres"></A></P>
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114	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild7" HEIGHT=200 WIDTH=276 SRC="../assets/images/autogen/a_city_vis_highestres_aa_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="city_vis_highestres_aa" TITLE="city_vis_highestres_aa"></A></P>
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122	<P> </P>
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131	<P><B><SPAN STYLE="font-size: 16pt; color: rgb(51,102,204);"><A NAME="GlobalIllumination"></A>GLOBAL ILLUMINATION</SPAN></B></P>
132	<P><B>Global Illumination</B> is the field of computer graphics that deals with <B>physically correct illumination</B>. Usually this is associated with stochastic raytracing solutions <B>taking hours to calculate a single picture</B>.</P>
133	<P>The <B>GTP IlluminationLib</B> brings physically correct rendering to the domain of realtime graphics.<BR>Effects that will be possible include:</P>
134	<OL>
135	<LI><B>Soft Shadow/Lighteffects</B></LI>
136	<LI><B>Dynamic Lightsources</B></LI>
137	<LI><B>Indirect Illumination</B></LI>
138	<LI><B>Reflections</B></LI>
139	<LI><B>Realtime Radiosity</B></LI>
140	<LI><B>High-Quality Materials (Metal,...)</B></LI>
141	<LI><B>Cloud Rendering</B></LI>
142	</OL>
143	<P>allowing for <B>previously unseen levels of realism</B> in 3D/game applications.</P>
144	<P>
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151	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild8" HEIGHT=200 WIDTH=266 SRC="../assets/images/autogen/a_illu-refrigerator_resize_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="illu-refrigerator_resize" TITLE="illu-refrigerator_resize"></A></P>
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154	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild9" HEIGHT=200 WIDTH=242 SRC="../assets/images/autogen/a_illu-metal-rings_3x3_resize_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="illu-metal-rings 3x3_resize" TITLE="illu-metal-rings 3x3_resize"></A></P>
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157	<P><A HREF="../html/demos___videos.html"><IMG ID="Bild10" HEIGHT=200 WIDTH=199 SRC="../assets/images/autogen/a_illu-skull_resize_1.gif" VSPACE=0 HSPACE=0 ALIGN="TOP" BORDER=1 STYLE="border-left-color: rgb(0,102,204); border-left-style: solid; border-top-color: rgb(0,102,204); border-top-style: solid; border-right-color: rgb(0,102,204); border-right-style: solid; border-bottom-color: rgb(0,102,204); border-bottom-style: solid;" ALT="illu-skull_resize" TITLE="illu-skull_resize"></A></P>
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