![]() Shaders always begin with a version declaration, followed by a list of input and output variables, uniforms and its main function. GLSL is tailored for use with graphics and contains useful features specifically targeted at vector and matrix manipulation. Shaders are written in the C-like language GLSL. We will now explain shaders, and specifically the OpenGL Shading Language, in a more general fashion. In the previous chapter we briefly touched the surface of shaders and how to properly use them. ![]() Shaders are also very isolated programs in that they're not allowed to communicate with each other the only communication they have is via their inputs and outputs. ![]() In a basic sense, shaders are nothing more than programs transforming inputs to outputs. These programs are run for each specific section of the graphics pipeline. ![]() As mentioned in the Hello Triangle chapter, shaders are little programs that rest on the GPU. ![]()
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