要通过一条样条曲线绘制出另外一条样条正弦样条曲线(或波浪线),原理是先求原曲线的曲线斜率在通过鼠标判断在曲线那边做，求偏移的点数组等方法，完成绘制波浪线-By a spline curve drawn through a sine-spline-spline curve (or wave lines), the principle is to seek the original curve in the curve slope in the curve through the side of t