用Opengl画出三维地形
代码说明：
读取dem数据，用Opengl画出三维地形，实现漫游。(Read dem data,and use Opengl to render the 3D Terrian. )
文件列表：
ZhangChao
.........\ChaoCamera.cpp
.........\ChaoCamera.h
.........\ChaoTesture.cpp
.........\ChaoTesture.h
.........\Debug
.........\Dem.cpp
.........\Dem.h
.........\MainFrm.cpp
.........\MainFrm.h
.........\ReadMe.txt
.........\res
.........\...\ZhangChao.rc2
.........\Resource.h
.........\Sky
.........\...\skyb4.BMP
.........\SkyBox.cpp
.........\SkyBox.h
.........\StdAfx.cpp
.........\StdAfx.h
.........\terrain
.........\.......\085008.dem
.........\.......\beijing.bmp
.........\Vector3.cpp
.........\Vector3.h
.........\ZhangChao.aps
.........\ZhangChao.clw
.........\ZhangChao.cpp
.........\ZhangChao.dsp
.........\ZhangChao.dsw
.........\ZhangChao.h
.........\ZhangChao.ncb
.........\ZhangChao.opt
.........\ZhangChao.plg
.........\ZhangChao.rc
.........\ZhangChaoDoc.cpp
.........\ZhangChaoDoc.h
.........\ZhangChaoView.cpp
.........\ZhangChaoView.h
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