Java Distance Calculate distance(int q1, int r1, int q2, int r2)

Description

Distance between two hexes.

License

Apache License

Declaration

public static int distance(int q1, int r1, int q2, int r2) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    /**//from  w  w  w . j  a va 2s  .  c  om
     * Distance between two hexes. If neighbors the distance is 1.
     */
    public static int distance(int q1, int r1, int q2, int r2) {
        int x1 = q1;
        int z1 = r1;
        int x2 = q2;
        int z2 = r2;
        int y1 = -(x1 + z1);
        int y2 = -(x2 + z2);
        return (Math.abs(x1 - x2) + Math.abs(y1 - y2) + Math.abs(z1 - z2)) / 2;
    }
}

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