1,用经线和纬线画出一个三维球体,经线用不同的颜色表示,用帧交换技术实现球体的转动 2,在球体外部画1-3个小球,实现大球转动的同时,小球绕大球转及速度交互可调 3,考虑设计通用程序,实现小球的个数大小旋转的轨迹-one with warp and weft, paint a three-dimensional sphere, warp with different colors, Frame switching technology used to achieve the rotati

交互画点画线，实现自动拖动旋转等功能！欢迎各位指正-interactive painting lines, automatic scrolling rotating function! Welcome to correction