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Overview
OpenGL is a software interface to graphics hardware.
This is a short description about OpenGL.

Rendering Pipeline
OpenGL Pipeline has a series of processing stages in order. Two graphical information, vertex-based data and pixel-based data, are processed through the pipeline, combined together then written into the frame buffer.

Transformation
OpenGL uses several 4 x 4 matrices for transformations; GL_MODELVIEW, GL_PROJECTION, GL_TEXTURE and GL_COLOR. Both geometric and image data are transformed by these matrices before OpenGL raterization process.

Matrix4 Class for OpenGL (C++)
Matrix4 class is a general purpose, stand-alone 4x4 matrix class. It can easily be integrated with OpenGL applications. It provides matrix transform routines that are equivalent to glTranslatef(), glRotatef() and glScalef().

Vertex Array
Using vertex arrays reduces the number of function calls and redundant usage of shared vertices. Therefore, you may increase the performance of rendering.

Display List
Display list is one of fastest methods to render static data because OpenGL commands and the vertex data are cached in the display list and minimize data transmissions from client to server side.

Vertex Buffer Object (VBO)
Vertex buffer object (VBO) allows vertex array data to be stored in high-performance graphics memory on the server side and promotes efficient data transfer.

Pixel Buffer Object (PBO)
Pixel Buffer object (PBO) stores pixel data in OpenGL controlled memory and allows asynchronous DMA pixel transfer to/from GPU. The typical usages of PBO is streaming texture updates and asynchronous readback.

Frame Buffer Object (FBO)
Framebuffer object (FBO) is a non-displayable rendering destination to provide an efficient way of render-to-texture and offscreen rendering.

Tessellation
Tessellation is subdividing concave polygons or self-intersecting polygons into convex polygons. The winding rules and winding numbers determine which parts of polygon are filled or not filled.

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楼主好人，谢谢分享最近正在学习gl

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学习一下

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