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Retidy, removing align=left from headings and empty paragraphs

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James Gregory 2013-12-30 15:37:13 +11:00
commit a96a114403
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@ -1,5 +1,4 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
@ -19,17 +18,21 @@
<center>
<table border="1">
<tr>
<td><a href="69-04.html">Previous</a></td>
<td>
<a href="69-04.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="70-02.html">Next</a></td>
<td>
<a href="70-02.html">Next</a>
</td>
</tr>
</table>
</center>
<p><br /></p>
<h2 id="Heading1">Chapter 70<br />
Quake: A Post-Mortem and a Glimpse into the Future</h2>
@ -55,16 +58,20 @@
<p>The BSP tree is built using the polygon that splits the fewest of the polygons in the current node&rsquo;s subspace as the heuristic for choosing splitters, which is not an optimal solution&mdash;but an optimal solution is NP-complete, and our heuristic adds only 10% to 15% more polygons to the level as a result of BSP splits. Polygons are not split all the way into leaves; rather, they are placed on the nodes with which they are coplanar (one set on the front and one on the back, which has the advantage of letting us reuse the BSP-walking dot product for backface culling as well), thereby reducing splitting considerably, because polygons are split only by parent nodes, not by child nodes (as would be necessary if polygons were split into leaves). Eliminating polygon splits, thus reducing the total number of polygons per level, not only shrinks Quake&rsquo;s memory footprint, but also reduces the number of polygons that need to be processed by the 3-D pipeline, producing a speedup of about 10% in Quake&rsquo;s overall performance.</p>
<p><br /></p>
<center>
<table border="1">
<tr>
<td><a href="69-04.html">Previous</a></td>
<td>
<a href="69-04.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="70-02.html">Next</a></td>
<td>
<a href="70-02.html">Next</a>
</td>
</tr>
</table>
</center>