package com.wgcloud.util;

import com.wgcloud.dto.TuopuNodeDto;

import java.util.List;

/**
 * 拓扑图工具类
 */
public class TuopuUtil {

    /**
     * 设置每个节点的坐标
     * @param list
     */
    public static void initList(List<TuopuNodeDto> list) {
        int centerX = 760;//圆心坐标
        int centerY = 520;
        int radius = getRadius(list.size());//半径
        int count = list.size();
        //count: 节点数目
        for (int i = 0; i < list.size(); i++) {
            int x = centerX + (int) (radius * Math.cos(Math.PI * 2 / count * i));
            int y = centerY + (int) (radius * Math.sin(Math.PI * 2 / count * i));
//            System.out.println(x+","+y);
            list.get(i).setX(x);
            list.get(i).setY(y);
//            node[i].setX(x);
//            node[i].setY(y);
        }

    }

    public static int getRadius(int count) {
        if (count == 1) {
            count = 2;
        }
        double disitem = (double) 360 / count;
        double minr = 5 / Math.sin(0.5 * disitem * Math.PI / 180);
        double noder = minr * 1.5 + 5 * 3 + 80;
        if (noder < 260) {
            noder = 260;
        }
        return Integer.valueOf(String.valueOf(noder).substring(0, String.valueOf(noder).indexOf(".")));
    }


}