以DirectX导入模型，加入灯光、主要是实现阴影技术-To DirectX import model, adding lighting, mainly the realization of the shadow of technology

OPENGL宝典上的教程源码，实现了多个3D物体绘制以及阴影，添加了相机控制，供新手学习使用-OPENGL source book on the course and achieve a number of 3D objects, as well as shadow mapping, add a camera control, for learning to use new