基于点云的三维纱线参数化建模  

Three-dimensional parametric modeling of yarn based on point clouds

作　　者：李文雅 梁建行 薛涛 董真真 LI Wenya;LIANG Jianhang;XUE Tao;DONG Zhenzhen(School of Textile Science and Engineering,Xi′an Polytechnic University,Xi′an,Shaanxi 710048,China)

机构地区：[1]西安工程大学纺织科学与工程学院,陕西西安710048

出　　处：《纺织学报》2024年第11期80-87,共8页Journal of Textile Research

基　　金：陕西省教育厅重点科学研究计划项目(20JY026);中国纺织工业联合会科技指导性项目(2022020);博士科研基金项目(BS202105);陕西省科技计划陕西省重点研发项目一般项目(2024GX-YBXM-569)。

摘　　要：针对纱线生产和用于织物开发中的设计周期长、打样成本高等问题,提出了基于点云的方法来进行三维纱线参数化建模,构建了短纤维纱线(如纯棉纱)的模型。首先以空间圆参数方程和Python的图形库Circle为基点建立圆堆图,然后结合不同象限的螺旋线捻向公式,以圆堆图为起点建立空间样条曲线。根据纱线中纤维的扭曲特性,将空间曲线划分为多个等距线段,并以这些线段的切线方向作为近似法向量,进而构建出由三维点云表示的多个空间圆,然后利用点云曲面重建算法将点云构建为初始三角网格模型,最后对初始三角网格模型进行曲面细分,从而得到光滑且精度高的三维纱线模型。实验结果表明,该方法能快速生成真实的三维纱线模型,且模型中包含纤维根数、纤维直径、纱线捻向、毛羽等多个特征点,可提高生产效率。Objective The three-dimensional yarn simulation is an important part for yarn design and fabric development.The use of computer simulation technology to simulate and visualize the yarn appearance is the key part of the current research.At present,most yarn simulations are carried out in two-dimensional or three-dimensional space,so that the appearance and shape of the yarn are limited.Therefore,it is necessary to design a fast and real three-dimensional yarn modeling method.Method Circle stack diagram is first established based on the space circle and the Circle library,and then the spatial spline curve is established by combining the spiral twist equations of the circle stack diagram in different quadrants.According to the twisting characteristics of the fibers in the yarn,the curve is divided into multiple equidistant line segments,the spatial circle represented by the 3-D point cloud is established with the line segments as the normal vector,and the point cloud meshing algorithm is used to construct the point cloud as the initial triangular mesh model.The Loop subdivision algorithm is used to subdivide the mesh model.Results The effectiveness of the 3-D yarn model based on point cloud method is verified and analyzed,and the 3-D yarn model established by different methods was compared and demonstrated.According to the effect of the 3-D yarn model established in literature,the geometric tube is modeled according to the input yarn parameters to match these fibers,and several single yarns with different structures are simulated,which shows that this is an effective yarn modeling and rendering method.In the three-dimensional yarn model based on the point cloud method,the distribution of fibers in the yarn cross-section is uneven,therefore it is necessary to deal with the regular circle pile diagram established by the regular yarn cross-section.Through the randomness of the starting point of fiber generation and the twisting state of the fiber,combined with the spiral twisting formula of different quadrants,the thre

关 键 词：圆堆图 空间曲线 点云 三角网格 纱线模型 

分 类 号：TS101.8[轻工技术与工程—纺织工程] TP391.9[轻工技术与工程—纺织科学与工程]