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

Android平台的APP代码(Eclipse,ADT),实现了基本3D对象(点,线,面,体)的绘制,单指与双指操控,包含三维的各种变换:平移,旋转,缩放,透视,是学习动画与仿真的入门代码.(Android platform APP code (Eclipse, ADT), to achieve the basic 3D object (point, line, surface, body) rendering, refers to a single and double finger mani