Block-based Viewpoint Generation Algorithm for Large Scale Terrain LOD

Virtual battlefield environment simulation for construction of the speed of large-scale topography, have introduced a block based on viewpoint and the LOD terrain generation algorithm for large-scale, which can quickly build massive data terrain model.The algorithm first massive terrain data block after the quadtree storage.Then apply the simple cone visual terrain Rapid cutting block and apply the simple cone visual terrain rapid cutting block.Discarded and the visual bulk of the terrain from the block, the intersection of the terrain and visual body block cut out from the body in visual quadtree node.To the node depending on the view distance and the roughness of the terrain itself, choose the appropriate LOD terrain rendering, the final application of the method based on point of view to eliminate cracks.Experimental results show that the algorithm compared with Quadtrees can be reduced by about 1/2 hours, and to generate large-scale high-fidelity terrain data can be used for reconstruction of objects in reverse engineering design problems.