aquathinker的专栏 -- AquaMarine Animation

The primitive assembly stage receives as input the processed vertices from the vertex shader, and the vertex connectivity information from the application as specified by in the glDraw* family of Open

A vertex shader operates on individual vertices, one vertex at a time. The shader has no knowledge of the other vertices that make up the graphical primitive, and has no clue of what type of primitive

The vertex processor is responsible for running the vertex shaders. The input for a vertex shader is the vertex data, namely its position, color, normals, etc, depending on what the OpenGL application

In this tutorial shader programming using GLSL 1.2 will be covered. Shaders are a hot topic and 3D games have shown that they can be put to good use to get remarkable effects. This tutorial aims at pr

This section deals with two important concepts for understading graphic pipelines: rasterization and interpolation. These are fixed components of the graphics pipeline, i.e. they are not programmable.

The geometry shader is part of the specification since OpenGL 3.2.This stage is optional. When present, a geometry shader receives as input the primitives assembled in the previous stage. A geometry

Below is a simplified diagram of the pipeline for OpenGL from version 3.2 forwards. In the next sections each stage will be described. The numbers in parenthesis indicate which OpenGL version is requi

This will be the updated version of GLSL tutorial. Only the core version will be dealt in here. For compatibility features please go to the original GLSL 1.2 Tutorial.The tutorial is, and will be in

The fragment processor is where the fragment shaders run. This unit is responsible for operations like:Computing colors, and texture coordinates per pixelTexture applicationFog computationComputin

The following figure is a (very) simplified diagram of the pipeline stages and the data that travels amongst them. Although extremely simplified it is enough to present some important concepts for sha

In this page a set of examples of simple geometry shaders will be provided, to illustrate some of the features mentioned in the  previouspage.Example 1 – a pass-through shaderThis example assu

Tessellation is a stage in the graphics pipeline that receives patches as inputs and generates new primitives which can be points, lines, or triangles.A patch is an array of vertices whose attribute

A fragment shader processes…fragments. The fragments that were discovered in the rasterization process, and whose attributes were computed in the interpolation phase, are now fed, one by one, to the f