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  OpenGL 1.4, what features are you using?  (Read 2169 times)
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Offline gregorypierce

Senior Devvie

I come upon thee like the blue screen of death....

« Posted 2003-12-10 14:25:34 »

What OpenGL1.4 specific features are you guys using in your applications? I need to energize Apple to provide comprehensive OGL1.4 support with more practical real world examples and to do that I would like to tell them what features other people are actually using.

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Offline shawnkendall

Senior Devvie

Exp: 20 years

« Reply #1 - Posted 2003-12-10 15:01:20 »

Two words...
V B Os  Grin

Shawn Kendall
Cosmic Interactive, LLC
Offline Markus_Persson

JGO Wizard

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Mojang Specifications

« Reply #2 - Posted 2003-12-10 15:40:34 »

Isn't that tree words?

Anyway, from the stuff listed as "new" in 1.4, I use Automatic Mipmap Generation and Multiple Draw Arrays.

I've got a feeling I'll start using vertex programming as well soon.

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Offline elias

Senior Devvie

« Reply #3 - Posted 2003-12-10 17:37:29 »

I'm not trying to be an asshole, but those examples won't persuade me if I were Apple.

VBOs and vertex programs - these are merely _extensions_ defined along with the 1.4 specs. You can use them just fine with OpenGL 1.3 and probably with lower versions. ATI only supports 1.3 in the version string even on windows, but VBO and vertex/fragment programs both exist anyway. The point is that OGL 1.4 is not strictly nescessary.

Automatic mipmap generation - is only really nescessary if you generate textures to save the bus roundtrip. And then only for textures (re-)generated often. If you only use textures from memory or disk, you can just as well use GLU or your own function.

Multiple draw arrays - I've never seen any use for them, and specificly not any performance gains. Your mileage may vary, as usual.

What Apple probably want to hear is people using any features in 1.4 not previously exposed as ARB extensions.

- elias

Offline Orangy Tang

JGO Kernel

Medals: 57
Projects: 11

Monkey for a head

« Reply #4 - Posted 2003-12-10 18:03:33 »


What Apple probably want to hear is people using any features in 1.4 not previously exposed as ARB extensions.

Is there any though? A look though the spec shows that all the extra functionality was previously avalible as an extension in some form or another, and the only ones not an ARB or EXT are mipmap generation (previously SGIS extension) and blend squaring (previously an NV extension).

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Offline Yuri Vl. Gushchin

Senior Devvie

Speak Java!

« Reply #5 - Posted 2003-12-12 07:42:04 »

VBOs, vertex programs, texture mirrored repeat, point parameters (point size distance attenuation)


Yuri Vl. Gushchin
JProof Group
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