抄録
In this paper, collars are classified into three basic types - stand-collar, roll-collar and open-collar according to their structure. A geometrical model is established to simulate these collars and methods of drafting patterns are considered too. The collar shape was modeled as three-dimensional Bezier patches. Changing the position of control points of these patches can interactively control the collar shape. Triangular surface developing method is employed to make the pattern for stand-collar. For roll-collar and open-collar, flat pattern method using the data calculated from three-dimensional coordinates of control points are employed. With these methods, an interactive collar designing system is developed to simulate collars and automatically make patterns. Considering practical usage, we reproduced three types of collars with the patterns drafted by the system, and observed these reproductions congruent with simulated ones well. It is demonstrated to be more reliable, efficient and accurate than the method of handwork.
