ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

A simple modeling method for plant petal was presented. The modeling process could be realized easily. The initial shape of the model was a rectangle surface. A variety of deformation functions were adopted to change rectangle outline and approach petal outline. The surface-position vector of plane surface was modified by adding a perturbation function. The geometric shape of petal was obtained from curved surface and concave-convex texture. The combination of some basic functions was applied to the color simulation of the petal. The results show that the various plant petal modes can be designed quickly using the method, the shape and color of the petal can vary continuously, and the growth model can be built easily.  