From: Michael Brooks <michael.brooks@...>
Date: 2010-01-14T04:55:22+09:00
Subject: Re: 3D with Ruby (Ogre ?)

Hello Marc-antoine:

> Michael Brooks wrote:
>> I used the the gears.rb as the basis for a OpenGL programmable shader
>> (i.e.
>> GLSL) version of the gears program.  The intro to it and download can be
>> found through here:
>>
>> http://osdir.com/ml/ruby-talk/2009-03/msg00749.html
>
> The shaders are nice. Is OpenGL able to use shaders ? Or you made it to
> use shaders your own way ?

OpenGL has had shaders for quite a while:

http://en.wikipedia.org/wiki/GLSL
http://www.opengl.org/documentation/glsl/

All you need to do is write the shaders and load them into the GPU via 
OpenGL's GLSL API.

OpenGL and Microsoft DirectX/3D have been leapfrogging each other for the 
past 10 years and the shader capabilities of each are pretty comparable. 
Because of OpenGLs extension mechanism OpenGL will sometimes get a feature 
before DirectX/3D but unfortunately the acquiring the Pixel Format / 
Rendering Context (roughly equivalent to the capability-bits in DirectX/3D) 
in OpenGL has gotten really ugly because of that.

Michael