OpenGL 4 Shading Language Cookbook - Third Edition

How it works...

Sampler objects are simple to use and make it easy to switch between different sampling parameters for the same texture or use the same sampling parameters for different textures. In steps 1 and 2, we create a texture and bind it to texture unit 0. Normally, we would set the sampling parameters here using glTexParameteri, but in this case, we'll set them in the sampler objects using glSamplerParameter. In step 3, we create the sampler objects and assign their IDs to some variables. In steps 4 and 5, we set up the appropriate sampling parameters using glSamplerParameter. This function is almost exactly the same as glTexParameter except the first argument is the ID of the sampler object instead of the texture target. This defines ...