opengl程序，可以进行旋转平移，旋转以后还可以按正常的上下平移旋转-a program that is done by opengl,it can be used for transport and rotation

不规则碎片形数字地表模型的实现代码,可以应用于交通及土地规划的相关模型中.-Fractal digital terrain model of the implementation code, can be applied to transport and land use planning related to the model.