基于三维花卉模型的纬编提花织物设计  

Design of weft-knitted jacquard fabrics based on a three-dimensional flower model

作　　者：商林婧 张爱军 张燕婷 SHANG Linjing;ZHANG Aijun;ZHANG Yanting(Engineering Research Center for Knitting Technology,Ministry of Education,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学针织技术教育部工程研究中心,江苏无锡214122

出　　处：《丝绸》2023年第11期109-116,共8页Journal of Silk

基　　金：江苏省自然科学青年基金项目(BK20221094)。

摘　　要：花卉是针织物中常用的提花图案,由于其结构复杂且种类繁多,设计人员需要消耗较长的时间来绘制。文章为提高织物设计效率,提出了一种基于三维数据的花卉意匠图生成算法。在分析二维图像中花朵结构的基础上,建立了基于正投影原理和镜像对称原理的花朵三维模型;根据用户绘制的二维椭圆,对已有模型进行变换矩阵处理,生成了多角度的花朵三维模型;将多个视角的三维模型生成图案,转换为提花圆机可用的花型意匠图。本文建立的花朵三维模型在C++编程语言下实现了在较短时间内完成针织意匠图的生成和使用,而且建立的模型重复利用率高,避免了资源浪费。Flowers are a kind of jacquard pattern,and are widely used by designers in the drafting process of knitting notation.However,it takes quite a long time to complete due to multiple varieties and complex structure.To improve the efficiency of fabric design,the design principle of flower notation by demonstrating a 3D-data-based generating algorithm was proposed.Based on the analysis of flower structure in 2D image,a 3D flower model with orthographic projection principle and mirror symmetry principle was established.The petal of the flower and the whole flower were regarded as a symmetrical object and a three-dimensional cone with a certain angle of tilt,respectively.According to the three-dimensional cone,the planes were set as the symmetric plane of each three-dimensional petal,and they were composed of the point corresponding to the starting point of each petal in the two-dimensional picture of the three-dimensional space,the center of the bottom surface of the cone,and the center of the flower.By calculating the normal vector of the symmetric surface and combining with the two-dimensional coordinates of a pair of symmetric points in the left and right contour curves of the petal,the three-dimensional depth information of the symmetric points and the edge curve depth value of each petal were obtained.Then,through interpolating the edge curves of petals and connecting them into triangular surfaces according to certain rules,the 3D model was generated.According to the two-dimensional ellipse drawn by the user,the transformation matrix of the existing model was processed to generate a multi-angle three-dimensional flower model.The constructed three-dimensional model was regarded as a three-dimensional cone after proper adjustment,in which central axis was parallel to the Z-axis and the center of the bottom circle was located at the origin.The plane with the bottom circle of the cone was regarded as the interface for users to draw two-dimensional ellipses.After a certain rotation of the bottom circle,the orthogonal p

关 键 词：三维模型 针织意匠图 花卉 提花织物 二维椭圆 空间变换 

分 类 号：TS184.1[轻工技术与工程—纺织材料与纺织品设计]