3D图形的高度图实现地形用1张纹理贴上去的-3D graphics to achieve a high degree of map terrain with a texture of the paste up

构造一个Camera类，它代表着摄像机，我们应该提供对摄像机的一般控制操作，例如移动，旋转，设置坐标，获取坐标等。这样我们就可以很容易的用鼠标键盘控制Camera进行漫游世界-Construct a Camera class that represents the camera, we should provide the general control of the camera operations, such as mobile, rotating, set coordinates, su

基于c++的一个“相机类”，便于与opengl等其他库函数结合生成三维场景，或者其他三维观察及设计应用-C++ is based on a camera category, other library functions to facilitate opengl, etc. combine to generate a three-dimensional scene, or other three-dimensional observation and design applications