Abstract
This paper deals with a style design system developed for creating shapes with required highlight lines entered using the computer mouse. Highlight lines are a very important parameter for evaluating the aesthetic shape of products. The system allows simple construction of high quality surfaces in virtual space by evaluating the shapes of highlight lines. This paper also proposes methods for defining evolutes representing the curvature centers of a surface cross section by using highlight line information, and clarifies that an involute of an evolute is the cross section having a shape with the required highlight lines. Process methods to define an evolute of the shape of a modified cross section are classified according to the changes of the curvature. The system was developed by implementing algorithms based on the proposed method, and the usefulness of the system was confirmed through fundamental tests.
