OpenGL – Build high performance graphics

Designing a GLSL shader class

We will now have a look at how to set up shaders. Shaders are special programs that are run on the GPU. There are different shaders for controlling different stages of the programmable graphics pipeline. In the modern GPU, these include the vertex shader (which is responsible for calculating the clip-space position of a vertex), the tessellation control shader (which is responsible for determining the amount of tessellation of a given patch), the tessellation evaluation shader (which computes the interpolated positions and other attributes on the tessellation result), the geometry shader (which processes primitives and can add additional primitives and vertices if needed), and the fragment shader (which converts a ...