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	<title>Comments on: Oval and rectangular viewports</title>
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	<link>http://polymathprogrammer.com/2008/08/18/oval-and-rectangular-viewports/</link>
	<description>Where entrepreneurship, mathematics and programming meet</description>
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		<title>By: The truth about fog &#124; Polymath Programmer</title>
		<link>http://polymathprogrammer.com/2008/08/18/oval-and-rectangular-viewports/comment-page-1/#comment-3801</link>
		<dc:creator>The truth about fog &#124; Polymath Programmer</dc:creator>
		<pubDate>Mon, 13 Oct 2008 09:18:57 +0000</pubDate>
		<guid isPermaLink="false">http://polymathprogrammer.com/?p=401#comment-3801</guid>
		<description>[...] outdoor scenes need to be &#8220;contained&#8221;. The trick is to use clipping planes, a near plane and a far plane, to restrict the amount of visible [...]</description>
		<content:encoded><![CDATA[<p>[...] outdoor scenes need to be &#8220;contained&#8221;. The trick is to use clipping planes, a near plane and a far plane, to restrict the amount of visible [...]</p>
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		<title>By: Cartesian coordinates and transformation matrices &#124; Polymath Programmer</title>
		<link>http://polymathprogrammer.com/2008/08/18/oval-and-rectangular-viewports/comment-page-1/#comment-3548</link>
		<dc:creator>Cartesian coordinates and transformation matrices &#124; Polymath Programmer</dc:creator>
		<pubDate>Wed, 03 Sep 2008 09:04:29 +0000</pubDate>
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		<description>[...] plane is upright, representing the screen. The z-axis simply protrudes out of the screen. The viewport can cover all four quadrants of the XY plane. The illustration only covered the first quadrant so I [...]</description>
		<content:encoded><![CDATA[<p>[...] plane is upright, representing the screen. The z-axis simply protrudes out of the screen. The viewport can cover all four quadrants of the XY plane. The illustration only covered the first quadrant so I [...]</p>
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		<title>By: Lights, camera, action! &#124; Polymath Programmer</title>
		<link>http://polymathprogrammer.com/2008/08/18/oval-and-rectangular-viewports/comment-page-1/#comment-3506</link>
		<dc:creator>Lights, camera, action! &#124; Polymath Programmer</dc:creator>
		<pubDate>Mon, 25 Aug 2008 09:01:36 +0000</pubDate>
		<guid isPermaLink="false">http://polymathprogrammer.com/?p=401#comment-3506</guid>
		<description>[...] learned a bit on viewports already. Now, we&#8217;ll look at how lights and cameras are used in a 3D [...]</description>
		<content:encoded><![CDATA[<p>[...] learned a bit on viewports already. Now, we&#8217;ll look at how lights and cameras are used in a 3D [...]</p>
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