用B样条曲面构建纱线三维模型的研究(Ⅱ):纱线捻度的三维模拟

Study on constructing the 3D yarn model by B-spline surface (part Ⅱ):inserting 3D bumping texture on the surface of the yarn

在用B样条曲面构造具有不同截面的纱线三维模型基础上,对截面随机加上凹凸扰动,并沿着纱线的径向对各个截面进行旋转,使得纱线表面产生波浪状的捻度效应,相当于在纱线表面添加了三维凸包纹理,提高了模拟纱线的逼真程度,对于圆形截面纱线的效果特别显著。

Having constructed a single yam with different cross sections 3D model, a concave-convex type turbulence is exerted randomly on the cross sections while rotating the sections along the radial direction of the yam so that a wave-like twist effect is generated on the yam. This is equivalent to the 3D bumping texture being inserted on the surface of the yarn, improving the vividness of the simulated yams, especially to the yam with a nearly round cross section.