Trying to comprehend OpenGL

Chris_F · 2012-09-27T15:49:58

I'm coming from having worked mostly with Direct3D and only a small amount of OpenGL 1.x knowledge, and now that I'm trying to learn the ins and outs of modern OpenGL I'm having a very hard time understanding a few things, but none more than this business with deprecation. I'm trying to figure out what features I should or should not be using if I want to keep my code very core/forward compatible thing-a-ma-bob. I'm targeting 4.x specifically. Why is there no concise information available about what IS and IS NOT considered deprecated? Even more confusing is when I run into things like this: I read online that GL_EXTENSIONS is deprecated in 3.0, so why on Earth can I still use it when I am using the latest glcorearb.h and a 4.2 core profile forward compatible context? I thought it was supposed to be removed for forward compatible contexts.

Graphics and GPU Programming Programming OpenGL

Started by Chris_F September 20, 2012 08:02 PM

11 comments, last by Koehler 11 years, 6 months ago

L. Spiro

25,818

September 24, 2012 11:01 AM

Run your program through gDEBugger. It will show you when you are using any kind of deprecated functions or macros.
Remember, functions are not the only things that can be deprecated, and gDEBugger is probably the best way to make sure you are not using anything that is.

L. Spiro

I restore Nintendo 64 video-game OST’s into HD! https://www.youtube.com/channel/UCCtX_wedtZ5BoyQBXEhnVZw/playlists?view=1&sort=lad&flow=grid

3Ddreamer

3,826

September 26, 2012 01:40 AM

Thanks! I love this community!

Clinton

Personal life and your private thoughts always effect your career. Research is the intellectual backbone of game development and the first order. Version Control is crucial for full management of applications and software. The better the workflow pipeline, then the greater the potential output for a quality game. Completing projects is the last but finest order.

by Clinton, 3Ddreamer

Koehler

228

September 27, 2012 03:49 PM

L.Spiro has the right of it. A preemptive option is to check the SDK docs at opengl.org. The 3.3 and 4.2 manuals no longer include listings for functions that have been removed from the standard, so a good rule of thumb for core functionality is "if it's not in the SDK, it's probably no longer needed".

Extensions are a whole different can of worms.

Trying to comprehend OpenGL

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Trying to comprehend OpenGL

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