Info

• Spec here, tutorial here
• Defined in OpenGL 2.0
• Also known as glslang
• nVidia's cG also compatible with OpenGL
• "ARB extensions" - older?
• do glxinfo to get OpenGL version

Notes

Variables

• Uniforms - they don't change during a rendering. Read Only
• Attributes - only in vertex shaders. Input data. Change each vertex processed
• Varyings - for passing data from vertex to fragment shader. Read only in vertex but read/write in fragment.

Language Features

• 100% type safe (casts required from ints to floats)
• Vectors & matrices only fill-able in xtors

Operations

• dot, cross, normalize, clamp, texture2D

-- MattWalsh - 08 Dec 2008