Three dimensional simulation of weft knitted fabric based on surface model
Yinglin Li1,2, Lianhe Yang3, Suying Chen4, Lei Xu1,2
COMPUTER MODELING & NEW TECHNOLOGIES 2014 18(3) 52-57
1 School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
2 Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin 300387, China
3 School of Computer Science & Software Engineering, Tianjin Polytechnic University, Tianjin 300387, China
4 School of Textile and Clothing, Qingdao University, Qingdao 266071, China
In order to enhance the visual simulation effect of weft knitted fabric in weft knitting CAD system, a three dimensional surface model of weft knitted structures is developed and realized on the computer screen. It is assumed that the yarn centreline is continuous when it is stressed to bend, and the cross-section of yarn is circular and uniform. Three dimensional geometric models are created by using second order continuous NURBS curves. According to the trend of the yarn centreline, a surface model of the yarn is created by sweeping approach. With developing tools of Visual C++ and OpenGL graphics library, the surface model of loop is achieved by the method of mesh chips on computer screen, and the three dimensional simulation of weft knitted fabric is realized. The simulation effect based on surface model can be seen from the simulation results of basic weft knitted fabric.