OpenGL Cube Environment Mapping

This video demonstrates environment mapping using a cube map applied to a torus knot. I used ideas and template code from the Cg tutorial and code sampler Cg demos. Converted the Cg shaders to GLSL.

Category:

Science & Technology

Tags:

• opengl
• glsl
• shader
• graphics
• programming
• software
• C++
• Cg
• texture
• 3d

[MaitredeDieu]

nice rendering ;)

I wonder : are Cg shaders widely used or do you think it's better focusing on learning GLSL ?

[GraphicsProgrammer]

@MaitredeDieu Cg is more mature but you will need the Nvidia toolkit and their run time library so it will require additional dependencies. Also, Cg is a vendor specific product so you will often hear that Cg doesn't work as well on AMD hardware. GLSL is also built-in to OpenGL so nothing more is required. For these reasons, most prefer GLSL. People who work in graphics seem to know all 3 shading languages so it really doesn't matter which one you start out with.

[MaitredeDieu]

@GraphicsProgrammer sticking to my AMD gpu and GLSL then. Many thanks for the explanation :)