z Computer Graphics, 26,2, July 1992 Three Dimensional Hidehiko Apparel CAD System Haruo Niway~ Okabel, Haruki Imaoka2, Takako Tomih;and 1: Research Institute for Polymers and Textiles, 1-14, Higashi, Tsukuba, 305 Japan 2: Nara Women s University, Kits-uoya-nisirnachi, Nara, 630 Japan 3: Toray Industries, Inc., Engineering Research Labs., 3-3-1, Sonoyama, Otsu, 520 Japan Abstract We are developing a three dimensional ( denoted 3D, hereafter) CAD system for garments to help the process of pattern making. This is a process to create a 3D form of a garment by designing a two dimensional ( 2D, hereafter ) paper pattern that realizes the 3D form The core of the system is a simulator that estimates the 3D form of a garment put on a body from its paper pattern ( 2D~3D process ) and a developing program to obtain the 2D pattern that minimizes the energy required to deform it to the given 3D shape ( 3D ~2D process ). In both processes, the specific snisotropy of the mechanical properties of cloths is ecmsidered. In the 2D +3D process, the contact problem with body and geometrical nonlinearity are also taken into account. The preprocessor for the 2D+3D simulator is quite unique
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