Real-time simulation of large-scale virtual scene is one of the key techniques of digital earth, as well as the foundation of the military environment simulation applications. And it is also one of the important propositions of geographic information system (GIS) that must be solved in its course of development toward 3D GIS and VR GIS.
Real-time simulation for a simple scene, which includes only hundreds of polygons and dozens MBs of low-resolution textures, is achievable. But a larg...
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