基于约束图的三维服装约束问题求解

Geometric Constraint Description and Solving Technique in 3D Garment System

采用样条曲线作为基本几何元素,建立了三维服装几何约束关系。以此为基础构造了三维服装的约束图,有效地表达了几何元素及其相互关系。提出了基于约束图的改进的三维服装几何约束求解方法,完成了构造服装和对服装的交互参数化修改问题。通过应用实例将参数化方法向高层次图素进行了推广,并成功应用于服装CAD系统中,运行效果良好。

With the spline curve as the basic element of 3D garment design, three relations： same-point, symmetry and self-symmetry are firstly introduced as the constraints of garment geometric elements, then a constraint graph is established to describe the relations of garment geometric elements. A parametric design of 3D garment is realized by solving the constraint relations. This study extends parametric method to high level entities including the spline curve and mesh. The method has been successfully applied in a 3D garment design system.