Flat Knitting Loop Deformation Simulation Based on Interlacing Point Model

Textile Research Journal

Xia

et al. 2019

Self Cite

To realize three-dimensional (3-D) simulation of weft-knitted fabrics, this paper proposes a 3-D loop modeling method which includes yarn texture and rapid deformation of fabric. The deformation of the fabric is achieved using a simplified particle system. In this study, the shape of the loop is controlled by using 10 control points, and the coordinates of the loop type control points are calculated in combination with the actual loop shape and a quadratic Bezier curve equation. To realize the deformation of the loop, the relationship between the control points and the particle system is established. The 3-D surface model of the yarn is constructed based on a local frame of the loop path. In addition, the yarn simulation is achieved by texture mapping. The simulation of fancy weft-knitted fabric is realized by the joint programming of Visual Studio and OpenGL. The results show that the simplified particle model can accurately achieve the deformation of the fabric with high efficiency. The geometric model properly represents the loop shape and exhibits the yarn texture.

Section: Calculation Of Control Pointsmentioning

confidence: 99%

mentioning

confidence: 99%

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Deformation and geometric modeling in three-dimensional simulation of fancy weft-knitted fabric

Peng

Textile Research Journal

Xia

et al. 2019

Self Cite

“…

At present, fl at-knitting CAD software has developed maturely [9][10][11]. M1 PLUS system developed by Germany's STOLL and the SDS-ONE APEX system by Japan's SHIMA SEIKI are leading the development trend of fl at-knitting CAD technology.M1 PLUS has multiple views such as logo view, technological view, and textile view.

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mentioning

confidence: 99%

Design Method of Circular Weft-Knitted Jacquard Fabric Based on Jacquard Module

Zheng

Cong

2022

Autex Research Journal

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Recently, there is an increasing interest in design of circular weft jacquard because of the pursuit of fashion and comfort. Aiming at the complexity of the computer-aided design method of the existing circular weft-knitted jacquard fabrics, which is not conducive to the rapid design and intelligible for designers, a design method was proposed to transform pattern notation into knitting diagram efficiently, which was based on knitting rules and its creation as a set of jacquard modules. Knitting characteristics of jacquard fabrics were studied as a precondition. On this basis, the design procedures of jacquard modules were analyzed and illustrated by taking tricolor bird's eye backing jacquard as an example. Jacquard modules with various jacquard effects were designed and stored in a jacquard module database. To mathematically describe pattern notation, knitting diagram, and jacquard module, two-dimensional matrixes were established by the method of mathematical modeling, and a corresponding algorithm for the transformation of the pattern to knitting information according to the knitting rules of jacquard modules, which can be applied to ordinary jacquard fabrics was summarized. The project of tricolor circular weft-knitted jacquard with bird's eye in the reverse and four-color air-layer jacquard were taken for instance to verify the models and algorithm. The results obtained show that the approach can efficiently and conveniently realize the designation and machine-knitting of weft-knitted jacquard fabric, which provide a theoretical basis and notation of modeling for the computer-aided design of circular weft-knitted jacquard fabrics.

“…In 2017, Jiang et al. 16 established a geometric model of a single-sided transfer loop with a lot of control points (Figure 1(c)) and realized the simulation of cable; however, this method actually used the yarn texture mapping to achieve an unreal stereoscopic effect. A year later, Leaf et al.…”

mentioning

confidence: 99%

Modeling and realization for visual simulation of circular knitting transfer-jacquard fabric

Zheng

Textile Research Journal

2021

Self Cite

The purpose of this research was to achieve visual simulation of circular weft-knitted transfer-jacquard fabric based on a computer-aided design platform. The corresponding mathematical models were established according to pattern presentations after analyzing the structural characteristics of this kind of stitch. To determine the spatial geometry of the loops, eight-point models were built, especially the introduced multi-course loop model. By comparing the influence of four usual lights on stereoscopic sense, directional light was selected to establish an illumination model. Based on these models and matrix operations, spatial positions of different loop types in the intermesh structure were confirmed by coordinate mapping. The simulation effects of three important parameters of yarn spline rendering were analyzed and discussed, so as to choose the most reasonable data. Integrated with a transfer-jacquard design program, the approach realized three-dimensional structural simulation of circular knitting transfer-jacquard fabric with a naturalistic visual impression which can shorten the proofing process and even inspire the design potential of developers.