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londer

Which versions of OpenGL is not worth to learn anymore?

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And what i probably will be missing ,if i start learning OGL 3.3 now, after a year ? Edited by londer
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I recommend discarding anything older than OpenGL 3.0.

Have a look at [url="http://www.opengl.org/wiki/Core_And_Compatibility_in_Contexts"]Core and Compatibility in Contexts page[/url]. In OpenGL 3.0, a lot of the silly, old-fashioned slow and retarded stuff was marked deprecated. In OpenGL 3.0 through 3.2 they got a bit confused at how deprecation, feature removal etc. should be done, and (in the typical messy OpenGL fashion) they got it sorted out for good only in OpenGL 3.2. So, primarily go for OpenGL 3.2, and if that's not available, OpenGL 3.1 with forward compatibility, and if that's not available, OpenGL 3.0, but don't call any deprecated functions.

OpenGL 3.2 is actually quite modern, and doesn't have all that crap anymore it used to have. also, GLES2 and WebGL are conceptually (almost) identical to OpenGL 3.2 API-wise, although feature/extension-wise they differ somewhat.
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Not worth learning might be a bit of a stretch.

The problem is, OpenGL ( and DX ) moved from a fixed pipeline to a programmable one, completely changing the way you do stuff.


It was this massive shift that obsoleted prior knowledge, and I highly doubt we will see another massive shift anytime soon. In fact, moving to a programmable pipeline gives a great deal more flexibility, making such changes even less likely.

Long story short, learn modern OpenGL and rest easy.
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[quote name='londer' timestamp='1349202430' post='4986132']
And what i probably will be missing ,if i start learning OGL 3.3 now, after a year ?
[/quote]

3.x is a fine target and I'd second the very specific 3.2 as a good place to be. 2.x can still be quite popular and/or relevant but for the most part I'd be hard pushed to say you'd miss anything because improvements were made and a lot of older cruft has now been removed. Chances are you'd be missing more by going with an earlier version, if only because some of the now mandatory good parts were previously optional and you might just overlook them for that reason, which can also be a little misleading.
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Personally, and speaking from experience, I would stay away from 1.x. The fixed function pipeline is just too hard to ignore and you'll find it really hard to break away from once you get into it deeply. I found jumping into shaders and VBOs quite difficult as I had to unlearn so much.

Version 2.x is a good starting place, as the fixed pipeline is no longer necessary, but oddly, this version of GLSL still has fixed functionality. As others have stated, 3.x is probably the best starting point.
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Just found out on Amazon Books,

[url="http://www.amazon.com/OpenGL-Programming-Guide-Official-Learning/dp/0321773039"]OpenGL 4.X Red Book (One True God type book), 8th Edition, will be out on Feb. 17, 2013.[/url]
[url="http://www.amazon.com/OpenGL-Programming-Guide-Official-Learning/dp/0321552628/ref=sr_1_1?s=books&ie=UTF8&qid=1349277345&sr=1-1&keywords=opengl+programming+guide+7th+edition"]OpenGL 3.X Red Book (Similar...), 7th Edition, is available for under $45, if you live in US.[/url]

Everyone here is recommending you to go with OpenGL 3.X, especially 3.2. However, there's no better reference books than the above 7th edition. Aim for 7th Edition, or wait until next year for the 8th edition.

So, start from 3.0, then advance to 3.1, and then do some trials-and-errors on 3.2. That's the only way I see it may work for those who recommends you to go with GL 3.2.

Good luck. My post may not be helpful to your questions, but at least I'm steering you towards your rightful path.
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