杭州交通信息网中国古代有狮子:请英语高手翻译论文
来源：百度文库 编辑：杭州交通信息网 时间：2024/04/28 03:28:27
城市实物建模是三维城市地理信息系统(3D UGIS)的关键问题之一。本文在对数字城市研究体系中三维城市模型进行分析的基础上，应用实体几何和表面建模(CSG/B-rep)混合建模方法，实现了对城市建筑物的构造。并着重研究了单体建筑物模型数据处理和实体间内部空间关系。首先，通过对建筑物实体进行分析，总结了一组描述建筑模型的建筑CSG体元：揭示了建筑模型CSG体元之间的组合形态；再用边界法(B-rep)进行描述，给出了一种基于CSG/B-rep混合建模方案来构造三维建筑模型；总结了单体建筑物的数据获取方法；重点阐述了组成建筑物的单个实体或实体之间的空间约束关系，并采用最小二乘法对单体建筑物数据进行处理；然后,采用VC++和OpenGL进行开发，完成了模型的建立，试验表明单体建筑物建模时对数据处理是必要的，通过数据处理，降低建模的复杂性，提高了模型的可靠性和实用性。
3D Building modeling is a foundation of the urban model in 3D UGIS. Based on the requirement of geometry theory and 3D urban modeling, this paper presents a method to establish building model of digital city by applying CSG/B-rep hybrid method, especially in spatial relationships. A group of CSG entities is created for single building from image as the first step of the method herein. Then spatial relationships are established according to those featured objects, that is vertex,edge or face of architectures. CSG entities are assembled together by applying constrains in 3D spatiai and they are solved by least-square method. The paper summarized the method of obtainning data in the single building. B-representations are created as final results. Proposing spatial constrain relations of some solids during this course. Then the spatial relationships are described within the single building model on the basis of this model.The method of solid assembleing in building model has brief introduced.A phototype system is implemented by VC++ and OpenGL.3D building model of main teaching building of TYUT are tested as an example.Through the contrast of the model,the necessity of data processing is verified in single building modeling.Through data processing,reducing the complexity of modeling,it has improved the dependability and practibility of the model.
请高手给对照一下，有错的地方帮忙给改一下。谢谢！！
3D Building modeling is a foundation of the urban model in 3D UGIS. Based on the requirement of geometry theory and 3D urban modeling, this paper presents a method to establish building model of digital city by applying CSG/B-rep hybrid method, especially in spatial relationships. A group of CSG entities is created for single building from image as the first step of the method herein. Then spatial relationships are established according to those featured objects, that is vertex,edge or face of architectures. CSG entities are assembled together by applying constrains in 3D spatiai and they are solved by least-square method. The paper summarized the method of obtainning data in the single building. B-representations are created as final results. Proposing spatial constrain relations of some solids during this course. Then the spatial relationships are described within the single building model on the basis of this model.The method of solid assembleing in building model has brief introduced.A phototype system is implemented by VC++ and OpenGL.3D building model of main teaching building of TYUT are tested as an example.Through the contrast of the model,the necessity of data processing is verified in single building modeling.Through data processing,reducing the complexity of modeling,it has improved the dependability and practibility of the model.
请高手给对照一下，有错的地方帮忙给改一下。谢谢！！
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