基于三维草图的实体造型研究

Research on 3D-sketch based solid modeling

当前 3维 CAD造型系统得到广泛的应用 ,但其实体特征造型都是基于 2维草图的，针对基于 2维草图的实体造型方式存在着不能对很多空间的复杂实体进行造型的局限性，本文提出 3维草图的概念，能够很好地解决这一问题。在此基础之上，对基于 3维草图的实体生成及其在 3维造型系统中的管理方式与参数化进行了研究。

3D－ CAD Modeling systems are extensively applied today. But in all these systems the solids modeling are 2D－ Sketch based. Because the 2D－ Sketch based solid modeling method has the limit that many complicated 3D－ Solids can't be modeled by it, this paper propounds the concept of 3D－ Sketch which can overcome all the limits that the 2D－ Sketch based solid modeling method confronted. Furthermore, 3D－ Sketch based solid creating, the management of 3D－ Sketch in 3D－ Modeling system and the parameterization of 3D－ Sketch were discussed in this paper.