关键词: 服装纸样自动生成技术, 虚拟模特, 服装制版, 连体长裤, AutoCAD参数化

Abstract:

Objective With the rapid advancement of digital technology, the technology of automatic garment pattern generation is facing more tests and challenges. The method of two-dimensional parameter drawing is more accurate, more stable and less computational, but the operation process is lack of intuitive visualization, and the degree of integration of three-dimensional concepts is not enough, so it is difficult to achieve the effect of high fit for garment with high degree of fitting. Aiming at the problems such as misfit and poor fit, a method is put forward to automatically generate the pattern of fit trousers.

Method Focusing on women's jumpsuits, a method is established for the automatic generation of conjoined trouser patterns using the parameter constraint function of AutoCAD alongside three-dimensional design principles. Firstly, a three-dimensional human model is captured using a 3-D scanner, which is then transformed into an adjustable personalized virtual model using CLO3D. Subsequently, a parameterized constraint structure model of the jumpsuit is developed through AutoCAD's parameterization functions, enabling the rapid generation of customized one-piece trouser templates suitable for various body sizes.

Results CLO3D virtual modeling software is utilized to perform virtual stitching on garment patterns generated from three parametric structural models of jumpsuits. A comprehensive analysis was conducted, focusing on both the virtual aesthetic appearance and the pressure simulation during fitting to evaluate the comfort of the three groups of parametric samples. The results from the virtual fittings indicated that the personalized jumpsuits exhibited an appropriate level of looseness, with a smooth surface and no slack. The garment pressure maps showed that during standing, walking, and significant arm and leg movements, the pressure on all virtual garments remained between 0 kPa and 16 kPa, except in minor areas such as the knees and hips, where the garment experienced some pulling. When the model's arms and legs were raised, the pressure exerted by the garment on the human body at the measurement points for the three groups of personalized jumpsuits was generally below 5 kPa, which meets comfort requirements for human pressure distribution. Subsequently, the patterns generated based on the established parameters were produced in accordance with garment construction standards, followed by actual virtual fittings that allowed users to provide subjective feedback regarding their wearing experience. The results indicated that the ratings for all three samples were concentrated between 3.5 and 4.7, reflecting a positive try-on experience. However, the jumpsuit patterns generated using personalized parameters were found to be better aligned with user needs and preferences, resulting in a greater perception of comfort during wear. In conclusion, the parametric pattern generation method grounded in three-dimensional concepts effectively addresses fit and provides a refined solution for the complexities of garment fitting.

Conclusion The proposed automatic generation method for jumpsuit patterns effectively derives basic patterns from the surfaces of personalized virtual molds, fulfilling the demands for pattern visualization and customization. By adjusting user parameters, jumpsuit patterns with varying degrees of looseness can be generated automatically in accordance with specific constraints. The results demonstrate accuracy and efficacy in pattern generation. Unlike convenitional parametric programming, this approach enhances interactivity and simplicity, serving as a reference for developing parametric templates for a broader range of garment styles.

Key words: garment pattern automatic generation technology, virtual model, garment pattern making, jumpsuits, AutoCAD parameterization