这个是一个矩阵运算的代码引擎,采用C++语言编写,并已封装.该代码只用于3*3的矩阵,效率比较高,主要用于OpenGL ,D3D编程时候使用-this is a matrix calculation engine code using C language, and Packaging. The code used only 3 * 3 matrix, more efficient, mainly for the OpenGL, when using D3D programming