主要是对空间离散的三维数据【x,y,z】点进行连接,这个方法可以使曲线更加的光滑连续，无plot3函数产生线条的生硬。

-Mainly discrete three-dimensional data space {x, y, z] point connection, this method can make more smooth and continuous curve, without plot3 function generates blunt lines.