Construction of Large-scale Dynamic Terrain Based on Constrained DT
The large-scale terrain scene model is complex,the amount of data is large,and the dynamic real-time construc-tion efficiency is low.In this paper,the problem of dynamic construction of large-scale terrain is studied,and a method for dynamic real-time construction of terrain based on constrained DT is proposed.The method divides the large-scale terrain into several small terrain blocks,adds the four vertices of the terrain block to the terrain data set,and constructs a separate network for each terrain block,thereby realizing the rapid construction of large-scale terrain triangulation.Aiming at the dynamic change of the terrain,the method of adding expansion constraints is used to reconstruct the network only for the dynamically changing terrain within the expan-sion constraints,which improves the dynamic update efficiency of the terrain triangulation.When performing terrain texture map-ping,the terrain blocks are divided into blocks,and the mapping relationship between the texture data and the triangulation in the terrain sub-blocks is established to realize texture mapping,which improves the rendering efficiency.The experimental results show that the dynamic modeling of terrain blocks improves the efficiency of network construction and rendering after terrain dynamic changes.
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