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.