Research & Application Of Pattern Design Technique For GCAD

Along with the growth of rag trade asking for high quality GCAD(Garment CAD), two-dimensional GCAD has been out of date, since his limitation in intuition, third dimension and dressing vision. Three-dimensional GCAD has been arose many researcher's attention and recognition, and they acquired enormous achievement. They have gave a great deal of research to these domain: three-dimensional body measure, three-dimensional body modeling, three-dimensional garment design, three-dimensional freeform surface flattening and so on, and have gained much achievement. But, only through pattern the design of GCAD can apply to manufacture and turn into garment. Thus, along with the coming of the implement and application period, we should go out of think 3-D Garment design only, but go into think 3-D design and pattern design base on 3-D Garment design.Based on these thinking and user's needs for pattern design, this paper gives a new pattern design flow for 3-D GCAD. Add forecasting and evaluating technique for pattern quality, adjust pattern design result based on fabric characteristics technique, pattern hemming-stitch technique to old pattern design, make pattern design more integrity and right, improve the alternation of garment design.Second chapter introduces the method to get pattern in 3-D GCAD briefly, which is the base of pattern design. Although the flattening of 3-D garment freeform surface should satisfy two conditions as follow: the consistency of pattern area and pattern's edge or angle before and after flattening, distortion of pattern after flattening is exist certainly. Through the distortion, this paper analyzes the stress caught by flattening in pattern design, and shows the result in order to give opinion if the design of pattern is right or not. During the flattening, no fabric characteristic was considered, which makes the difference between design result and real result. This paper add fabric characteristic to flattened pattern to adjust pattern design result. Here we get a right designed pattern after adjust, but we should add seam boundary to the pattern before it was produced. In chapter 5, the paper introduces the design method and computer application particularly.Based on these work, introduces the system of LookStailorX and the application environment in chapter 6. At the same time, introduces the application of these research work in this system particularly. At last, makes a conclusion to the research work and gives a prospects from the perspectives of technology and application, of this project.