In order to create realistic loop primitives suitable for the fast computer-aided design (CAD) of the flat knitted fabric, we have a research on the geometric model of the loop as well as the variation of the loop surface. Establish the texture variation model based on the changing process from the normal yarn to loop that provides the realistic texture of the simulative loop. Then optimize the simulative loop based on illumination variation. This paper develops the computer program with the optimization algorithm and achieves the loop simulation of different yarns to verify the feasibility of the proposed algorithm. Our work provides a fast CAD of the flat knitted fabric with loop simulation, and it is not only more realistic but also material adjustable. Meanwhile it also provides theoretical value for the flat knitted fabric computer simulation.
If the inline PDF is not rendering correctly, you can download the PDF file here.
 Foley J D Van Dam A. Fundamentals of interactive computer graphics[M]. Reading MA: Addison-Wesley 1982.
 Francois Siewe; Sergei Grishanov; Thomas Cassidy; Geoffrey Banyard. An Application of Queuing Theory to Modeling of Melange Yarns Part I: A Queuing Model of Melange Yarn Structure[J].Textile Research Journal.2009(No.16):1467-1485.
 Özdemir H Başer G. Computer simulation of plain woven fabric appearance from yarn photographs. Journal Of The Textile Institute [serial online]. May 2009100(3):282-292.
 Sabit Adanur & Jaget S. Vakalapudi. Woven fabric design and analysis in 3D virtual reality. Part1: computer aided design and modeling of interlaced structures Journal of The Textile Institute 2013104:7 715-723.
 Goktepe O Harlock S.C.A 3D loop model for visual simulation of warp knitted structures[J]. Journal of the Textile Institute200293 Part l(1):11-28.
 Cong Honglian Ge Mingqiao Jiang Gaoming. Three Dimensional simulation of warp-knitted fabric[J]. Fibres & Textiles in Eastern Europe200917(74):66-69.
 Kurbak A Ekmen O. Basic studies for modeling complex weft knitted fabric structures Part I: A geometrical model for widthwise curling of plain knitted fabrics [J]. Textile Research Journal 2008 78(3): 198-208.
 Kurbak A. and Soydan A S. Basic studies for modeling complex weft knitted fabric structures Part III: A geometrical model for 1xl purl fabrics[J].Textile Research Journal 200878(5):377-38 1.
 Kurbak A Kayacan O. Basic studies for modeling complex weft knitted fabric structures Part V:Geometrical modeling of tuck stitches[J].Textile Research Journal200878(7):577-582.
 Efros A A Freeman W T. Image quilting for texture synthesis and transfer[C]//Proceedings of the 28th annual conference on Computer graphics and interactive techniques. ACM 2001: 341-346.
 Yuksel C Kaldor J M James D L et al. Stitch meshes for modeling knitted clothing with yarn-level detail[J]. ACM Transactions on Graphics (TOG) 2012 31(4): 37.
 Peirce F T. Geometrical principles applicable to the design of functional fabrics [J]. Textile Research Journal 1947 17(3): 123-147.
 Noman Haleem; Xungai Wang. Recent research and developments on yarn hairiness [J].Textile Research Journal.2015 (2) : 211-224
 Wang Yusang; Feng Xunwei. CAD of weft knitted jacquard fabrics based on geometrical model[J].Journal of China Textile University200026(6):66-70.