... 数字城市基于图形的地物模型重建本系统在面向对象数据结构的基础上,使用两种方法来进行模型的.综合 使用结构实体几何(Constructive Solid Geometry,或CSG)法和基于面的模型描 述法(B-Rep)来描述和构建地物的三维几何模型.
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根据结构实体几何法(CSG)建模思想,采用层次化、结构化的建模方法,构建了机床本体(包括刀具)模型;
On the basis of the idea of CSG modeling method, the hierarchical structural modeling method was adopted to construct machine(including tool)model.
雕塑实体模型通过裁剪曲面片和半边数据结构来表达几何和拓扑信息。
The topology and geometry of solid is represented by trimmed curve surface and half-edge data structure.
根据几何建模原理以及实体造型技术,从结构和功能上进行了结构建模的构架。
According to the principles of geometry modeling and solid molding techniques, the structural modeling is established by the aspects of structure and function.
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