3d引擎，没有用API。用的OpenGL. 包括 建筑3d模型 旋转模型 平坦阴影 光照 控制操作 　-3d engine, did not use API. Using OpenGL. Including construction 3d model of a flat rotation model of the shadow of light control operations

opengl简单源代码，实现三维模型旋转等功能，适合新手-opengl simple source code, to achieve a three-dimensional model of rotation, suitable for novice