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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
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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>
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<center>
<table border="1">
<tr>
<td><a href="38-03.html">Previous</a></td>
<td>
<a href="38-03.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="39-01.html">Next</a></td>
<td>
<a href="39-01.html">Next</a>
</td>
</tr>
</table>
</center>
<p><br /></p>
<p>Listing 38.2 isn&rsquo;t particularly interesting; it merely draws each horizontal line in the passed-in list in the simplest possible way, one pixel at a time. (No, that doesn&rsquo;t make the pixel the fundamental primitive; in the next chapter I&rsquo;ll replace Listing 38.2 with a much faster version that doesn&rsquo;t bother with individual pixels at all.)</p>
<p>Listing 38.1 is where the action is in this chapter. Our goal is to scan out the left and right edges of each polygon so that all points inside and no points outside the polygon are drawn, and so that all points located exactly on the boundary are drawn only if they are not on right or bottom edges. That&rsquo;s precisely what Listing 38.1 does. Here&rsquo;s how:</p>
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<p>I&rsquo;ve limited this chapter&rsquo;s code to merely demonstrating the principles of filling convex polygons, and the listings given are by no means fast. In the next chapter, we&rsquo;ll spice things up by eliminating the floating point calculations and pixel-at-a-time drawing and tossing a little assembly language into the mix.</p>
<p><br /></p>
<center>
<table border="1">
<tr>
<td><a href="38-03.html">Previous</a></td>
<td>
<a href="38-03.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="39-01.html">Next</a></td>
<td>
<a href="39-01.html">Next</a>
</td>
</tr>
</table>
</center>