基于构造框架的曲面造型系统

木文描述了一个基于构造框架的曲面造型方法。首先从一个长方体框架开始,进行一系列的局部修改操作,诸如移动一个框架的顶点,移动一条边,增加了条边,移动或拉起一个面等等,然后系统按照构造好的多面体框架自动地产生彼此光滑地连接的Bezier曲面片的组合,最后系统能显示出彩色阴影图形。因此,设计者无需进行大量的计算和数据输入就能设计出所需的曲面物体。

A Surface Modeling System, Based on Constructing Polyhedral Wireframe

This aticle describes a method of curvec surface modeling based on constructing polyhedral wireframe.First,we construct a cuboid wireframe,and then do' a series of local operations on the wireframe;such as moving a vertex,moving an edge,creating an edge,moving or lifting a surface and so on.After that,our system automatically produce Bezier surfaces composited according to the polyhedral wireframe,these surfaces will be smoothly connected with each other.At last,the system displays the color shaded pictures of these surfaces.Therefore,Disiger can easily construct an object,and needs no large amount of computation and data entries.