Pattern Making of Flared Skirts Using Geometric Modeling

Abstract

A Pattern making method was introduced for constructing flared skirts which flare increases towards the hem.Geometric shape model and drape model were made for the purpose. A model combined the side of circular truncated cone containing the case of the central angle of the development being larger than 2π was used forconstructing the shape model. In the part of the central angle larger than 2π, the base line of the cone was approximated by sine curve to describe the 3D shape. Using the model, an automatic pattern making method applicable to various cutting including spiral cutting was devised. A geometric drape model, which is derived from the post duckling shape of an elastic slender board, was made to illustrate the drape state. Some paper patterns by using different cutting methods were made, and constructed them experimentally. The present pattern making method is flexible, since it could reflect the measuring dimensions, the skirt height, number of parts, spiral angle, spreading and arranged colors as parameters. The drape model could represent the draped shape of a real flared skirt well by giving the number of nodes.