平行结构三维建筑化简中基于最短距离的面平移算法
Facet Shift Algorithm Based on Minimal Distance in Simplification of Buildings with Parallel Structure
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摘要: 从三维建筑的数据组织入手,提出了一种适于综合的数据结构,从平行结构建筑的正交化处理、平面结构的引入和特征信息的获取三个方面分析了建筑的结构化方法;根据可视化需求,将建筑LOD分为三个层次,在此基础上,以最短距离为指标实现了平行结构建筑的面平移化简算法。实验证明,该算法具有较高的效率和较好的通用性,对于平行结构建筑几何特征的化简具有良好的效果。Abstract: Building with parallel structures is the most popular kind in modern city.As the widely used 3D city model,more and more generalization methods for this kind of building have been developed.This paper begins with the structuring of 3D building data and then a data structure that benefits the generalization is proposed.Orthogonal of building,introduction of polygon and acquisition of feature information are used in building construction.According to the requirement of visualizations,LODs of city buildings are divided into three levels.Based on which,a simplification algorithm of shifting facet based on minimal distance is realized in the simplification of the building with parallel structures.Experiment was done to prove the good efficiency and usability of the algorithm and the algorithm works well in simplification of buildings with parallel structures.
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