波形图表随机生成一个不规则圆形，计算每两点直径的距离，超出范围时用箭头在图标上标注出来，只是一个很简单的功能，无聊写的-Waveform chart randomly generated an irregular circle, calculate the distance of each two diameters, when out of range with arrows marked out on the icon, is a very simple function, write si