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    <p>Nothing wrong with an older version of OpenGL for learning 3D graphics. The C programming language is 40 years old, Lisp even more, but they're still relevant. I do think it's important that you use at least OpenGL 1.3 or maybe 2.0/2.1 because, like most software, OpenGL 1.0 had some horrible bits that were quickly fixed in later versions.</p> <p>With OpenGL 1.x or 2.x you'll learn the fundamentals of 3D graphics: polygon geometry, nested transformations, lights &amp; materials, texture mapping. And they're easier to learn with OpenGL 1 or 2 than with 3 or 4, because there is a lot more built-in functionality in OpenGL 1/2 and many years worth of books and online tutorials for guidance.</p> <p>Books to read: the "Red Book" OpenGL Programming Guide, preferably an older 3rd or 4th edition; or the OpenGL SuperBible, again a 2nd or 3rd edition. You could also look up the excellent NeHe web tutorials - for OpenGL 1/2 these are now called "legacy tutorials." For the maths behind 3D graphics, I'd recommend the 3D Math Primer for Graphics and Game Development by Dunn &amp; Parberry.</p> <p>What you don't get in OpenGL 1.x are shaders for modern GPUs. Once you've got the basics down, you can start with vertex and fragment shaders in OpenGL 2. And once you're comfortable with those, start programming for OpenGL 4. (I recommend skipping over 3 and going straight to OpenGL 4 / DirectX 11.)</p> <p>This is assuming you want to learn from the top down, starting with built-in API functions that do most of the work for you and gradually going into more detail. If instead you'd rather dive in to the deep end, you want the OpenGL SuperBible 5th edition and a modern GPU with OpenGL 4. This is not the approach I prefer because IMHO OpenGL 3/4 are "3D assembly languages" and the learning curve is very steep, but some people do prefer it.</p> <p>Hope this helps.</p>
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    1. USHugh Fisher
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    1. COYes, it is a big difference. Today all realtime graphics happens on freely programmable GPUs. You can't really compare this to programming languages. Or actually you can. C is as good as 40 years ago, because it's Turing Complete. OpenGL-3 with GLSL is Turing Complete as well. But fixed function OpenGL-1 is *not* Turing Complete. And because this is a huge conceptual difference. Also shaders have been an integral concept in computer graphics for a long time, but fixed function pipelines GPUs (like OpenGL-1.1) never supported this; a lot of graphics coders were sneering at GPUs due to that.
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      1. USdatenwolf
    2. COAlso I think that doing it with shaders makes learning easier. Yes, there is more boilerplate code to be written. But the mere fact that no "magic" is going behind the scenes actually enhances the learning experience. And many of the newbie pitfalls of fixed function OpenGL (like the ill practice of setting up projection in a event handler) are simply not there in OpenGL-3. Also the whole hassle with glTexEnv and which texturing targets to enable/disable disappear.
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      1. USdatenwolf
    3. COToday I bought the redbook 8th edition for version 4.3 (rough cuts). I will read it simultaneously to my lecture.
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      1. USMaik Klein
 

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