高效的绘制曲线，结构清晰，代码完整，该源码可以很方便的应用到各自的工程项目中，不需要注册，不需要额外的动态、静态库的支持，轻松实现曲线绘制，而且方便调试-Efficient mapping curve, structural clarity, code integrity, the source can be easily applied to the respective projects, do not need to register, no need for extra dynamic,