voronoi算法实现平面上的点生成对平面的分割线，使用时先用鼠标在界面上任意点一些点delau按钮即可，本程离在CBuilder5上编译通过.-threshold algorithm plane formation on the point of view of dividing lines, the first use interface with the mouse in arbitrary point on some points delau button, the way from the CBuilder5 compiled through.