![]() CgĬg (“C for graphics”) is a high-level shader programming language developed by NVIDIA. Mesa, a software-based OpenGL-compatible graphics library, also supports shaders you may want to check that out if you have an older graphics card that doesn’t have shader support, but it will obviously run very slow compared to a hardware implementation. ![]() Most modern GPUs, particularly ones made by NVIDIA and ATI, support vertex and pixel shaders. The powerful flexibility enabled by shaders is probably the biggest advance in real-time graphics programming in the past several years. Pixel Shaders (also sometimes called Fragment Shaders or Fragment Programs) are executed on each pixel that’s rendered. Vertex Shaders (also sometimes called Vertex Programs) are executed on each vertex that’s processed by the graphics API. ![]() Simply put, shaders are small programs that are executed on a per-vertex or per-pixel basis. It contains sample C and Cg code and is accompanied by a simple diffuse lighting demo with full source code. This article provides an introduction to writing pixel shaders with the Cg shader programming language and using them in OpenGL with the ARB_fragment_program extension. Tutorial - Cg Pixel Shaders in OpenGL - Josh Beam's Website Josh Beam's Website Articles Software GitHub Email Tutorial - Cg Pixel Shaders in OpenGL
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