空间体对象间三维拓扑构建研究

根据三维拓扑的研究现状以及特定应用领域对三维拓扑的需求,分析了这些特定应用领域的拓扑关系,提出了两种三维拓扑构建方法。这两种方法在兼顾内拓扑的同时主要构建体之间的外拓扑关系。第一种方法是在体单独构建完毕后建立体之间的拓扑关系;第二种方法考虑到当前成熟三维建模软件或CAD软件中的数据大多以离散面方式组织,设计了自动寻体算法,同时构建体之间的外拓扑关系。利用深圳典型地籍数据和建筑设计图生成的三维数据进行实验,验证了此算法的可行性。

3D Topological Construction for Spatial Physical Object

Based on the theoretical study status of three-dimensional topology and real three-dimensional topology of specific applications needs,we analyze the topological relationships in some particular application areas,and conclude two approaches of building three-dimensional topological relationship with different data organization.Two methods mainly build exterior topology between bodies,while maintain interior topology within a body.The first one implements topological construction after body constructed individually.The second takes into account that most 3D model data organization are based on discrete faces set,and come up to a auto-search bodies algorithm which simultaneously gets the exterior topological relationship between bodies.Lastly,taking 3D data based on special parcel data and architectural plan in Shenzhen as an example,we verify feasibility and effectiveness of two methods.