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	<title>Comments on: Cheetah3D header file converter for iPhone</title>
	<atom:link href="http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/feed/" rel="self" type="application/rss+xml" />
	<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/?utm_source=rss&amp;utm_medium=rss&amp;utm_campaign=rss</link>
	<description>Mac and iPhone Software Development</description>
	<lastBuildDate>Fri, 04 Dec 2009 12:41:36 +0000</lastBuildDate>
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		<title>By: Scott builds Software &#187; Particle Effects on the iPhone</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-58</link>
		<dc:creator>Scott builds Software &#187; Particle Effects on the iPhone</dc:creator>
		<pubDate>Fri, 04 Dec 2009 12:41:36 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-58</guid>
		<description>[...] not Maya or 3DMax or Poser, it has many of the same features for a killer price. You&#8217;ll want Rob Bajorek&#8217;s model exporter, [...]</description>
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<p>[...] not Maya or 3DMax or Poser, it has many of the same features for a killer price. You&#8217;ll want Rob Bajorek&#8217;s model exporter, [...]</p>
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		<title>By: Mike</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-57</link>
		<dc:creator>Mike</dc:creator>
		<pubDate>Fri, 11 Sep 2009 05:29:00 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-57</guid>
		<description>Nevermind. I&#039;m a noob. I had the depth buffer turned off. Everything looks good!</description>
		<content:encoded><![CDATA[<p>Nevermind. I&#8217;m a noob. I had the depth buffer turned off. Everything looks good!</p>
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		<title>By: Mike</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-56</link>
		<dc:creator>Mike</dc:creator>
		<pubDate>Fri, 11 Sep 2009 04:38:10 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-56</guid>
		<description>I was so excited when I found this posting but I haven&#039;t had much luck. I have tried 3 different models and they all seem to be transparent looking. Maybe the windings are reversed?

Here is a screenshot: http://www.knert.com/cms/images/model.png</description>
		<content:encoded><![CDATA[<p>I was so excited when I found this posting but I haven&#8217;t had much luck. I have tried 3 different models and they all seem to be transparent looking. Maybe the windings are reversed?</p>
<p>Here is a screenshot: <a href="http://www.knert.com/cms/images/model.png" rel="nofollow">http://www.knert.com/cms/images/model.png</a></p>
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		<title>By: Rob Bajorek</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-52</link>
		<dc:creator>Rob Bajorek</dc:creator>
		<pubDate>Wed, 08 Jul 2009 03:59:13 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-52</guid>
		<description>Thanks for the kind words!  I hope the converter has made learning OpenGL more fun for you.</description>
		<content:encoded><![CDATA[<p>Thanks for the kind words!  I hope the converter has made learning OpenGL more fun for you.</p>
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		<title>By: CR</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-37</link>
		<dc:creator>CR</dc:creator>
		<pubDate>Sat, 13 Jun 2009 19:09:22 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-37</guid>
		<description>I&#039;m so happy about finding this little bit of code I&#039;m about ready to curl up and cry in a corner...

Seriously, thanks!  This thing has just made dealing with model creation on the iPhone so much easier for a newcomer to OpenGL like me.</description>
		<content:encoded><![CDATA[<p>I&#8217;m so happy about finding this little bit of code I&#8217;m about ready to curl up and cry in a corner&#8230;</p>
<p>Seriously, thanks!  This thing has just made dealing with model creation on the iPhone so much easier for a newcomer to OpenGL like me.</p>
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		<title>By: Rob Bajorek</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-21</link>
		<dc:creator>Rob Bajorek</dc:creator>
		<pubDate>Thu, 04 Jun 2009 18:52:39 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-21</guid>
		<description>Hi Scott,

Thanks for the feedback!  I&#039;m glad you&#039;re finding the converter useful and could work around that &#039;.&#039; problem.  I&#039;ll post an update later today that handles that and other C3D-&gt;Obj C naming issues automatically.</description>
		<content:encoded><![CDATA[<p>Hi Scott,</p>
<p>Thanks for the feedback!  I&#8217;m glad you&#8217;re finding the converter useful and could work around that &#8216;.&#8217; problem.  I&#8217;ll post an update later today that handles that and other C3D->Obj C naming issues automatically.</p>
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	<item>
		<title>By: Scott</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-20</link>
		<dc:creator>Scott</dc:creator>
		<pubDate>Thu, 04 Jun 2009 16:53:51 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-20</guid>
		<description>Excellent script, thanks. It is the last tool I needed to start working on my app.

Just some feedback to save others some time. I used your script on a sphere and it worked fine. However when I tried it on a more complicated object, it failed. The object was created using boolean operations in Cheetah. Cheetah used names beginning with Boolean.1 in the exported .h file. When I globally replaced Boolean.1 with Boolean1 in the .h file, the script worked like charm.

Again, thanks for the script. The prospect of learning Blender was depressing at best. LOL</description>
		<content:encoded><![CDATA[<p>Excellent script, thanks. It is the last tool I needed to start working on my app.</p>
<p>Just some feedback to save others some time. I used your script on a sphere and it worked fine. However when I tried it on a more complicated object, it failed. The object was created using boolean operations in Cheetah. Cheetah used names beginning with Boolean.1 in the exported .h file. When I globally replaced Boolean.1 with Boolean1 in the .h file, the script worked like charm.</p>
<p>Again, thanks for the script. The prospect of learning Blender was depressing at best. LOL</p>
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	<item>
		<title>By: Rob Bajorek</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-6</link>
		<dc:creator>Rob Bajorek</dc:creator>
		<pubDate>Tue, 12 May 2009 06:56:26 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-6</guid>
		<description>Hi Roger,

I didn&#039;t add support for VBOs because the performance benefit isn&#039;t clear.  On iPhone, VBO functions don&#039;t store data in the graphics hardware; the program will still copy from &quot;client&quot; side every draw.  Kevin Doolan has a &lt;a href=&quot;http://www.kevindoolan.net/blog/post/2009/03/06/iPhone-OpenGL-ES-Performance.aspx&quot; rel=&quot;nofollow&quot;&gt;good post&lt;/a&gt; about it.  There&#039;s more discussion about it on &lt;a href=&quot;https://devforums.apple.com/community/iphone/graphics/3d&quot; rel=&quot;nofollow&quot;&gt;Apple&#039;s iPhone developer forum&lt;/a&gt; (paid developer account required).  And from my personal experience, converting a project to use VBOs ran about the same.

I&#039;m not planning on VBO support unless Apple fixes their implementation (if that&#039;s possible; it might be a hardware limitation.)  That said, if someone sent me a VBO patch for the converter anyway, I&#039;d certainly add it as an option.</description>
		<content:encoded><![CDATA[<p>Hi Roger,</p>
<p>I didn&#8217;t add support for VBOs because the performance benefit isn&#8217;t clear.  On iPhone, VBO functions don&#8217;t store data in the graphics hardware; the program will still copy from &#8220;client&#8221; side every draw.  Kevin Doolan has a <a href="http://www.kevindoolan.net/blog/post/2009/03/06/iPhone-OpenGL-ES-Performance.aspx" rel="nofollow">good post</a> about it.  There&#8217;s more discussion about it on <a href="https://devforums.apple.com/community/iphone/graphics/3d" rel="nofollow">Apple&#8217;s iPhone developer forum</a> (paid developer account required).  And from my personal experience, converting a project to use VBOs ran about the same.</p>
<p>I&#8217;m not planning on VBO support unless Apple fixes their implementation (if that&#8217;s possible; it might be a hardware limitation.)  That said, if someone sent me a VBO patch for the converter anyway, I&#8217;d certainly add it as an option.</p>
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	<item>
		<title>By: Roger</title>
		<link>http://cocoaswirl.com/2009/05/09/cheetah3d-header-file-converter-for-iphone/comment-page-1/#comment-5</link>
		<dc:creator>Roger</dc:creator>
		<pubDate>Mon, 11 May 2009 16:45:31 +0000</pubDate>
		<guid isPermaLink="false">http://cocoaswirl.com/?p=41#comment-5</guid>
		<description>Hi,
thank you very much for publishing the perl-script. Have you also tried to optimize it for using VBOs?</description>
		<content:encoded><![CDATA[<p>Hi,<br />
thank you very much for publishing the perl-script. Have you also tried to optimize it for using VBOs?</p>
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