OpenGL 矩阵变换相关链接

OpenGL Transformation  http://www.songho.ca/opengl/gl_transform.html

OpenGL Projection Matrix  http://www.songho.ca/opengl/gl_projectionmatrix.html

OpenGL Normal Vector Transformation  http://www.songho.ca/opengl/gl_normaltransform.html

Homogeneous Coordinates  http://www.songho.ca/math/homogeneous/homogeneous.html