Fleche de guidage

package net.redheademile;

import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.util.Vector;

public class ArrowTest
{
    private static String
            F = "⬆",
            FL = "⬉",
            L = "←",
            BL ="⬋",
            B = "⬇",
            BR = "⬊",
            R = "→",
            FR = "⬈";

    public static String calculateArrow(Player player, Location targetLoc)
    {
        String arrow = "nop";

        Vector a = targetLoc.toVector().setY(0).subtract(player.getLocation().toVector().setY(0));
        Vector b = player.getLocation().getDirection().setY(0);

        double angleDir = (Math.atan2(a.getZ(), a.getX()) / 2 / Math.PI * 360 + 360) % 360,
                angleLook = (Math.atan2(b.getZ(), b.getX()) / 2 / Math.PI * 360 + 360) % 360,
                angle = (angleDir - angleLook + 360) % 360;

        if (angle <= 022.5 || angle > 337.5) arrow = F;
        else if (angle <= 337.5 && angle > 292.5) arrow = FL;
        else if (angle <= 292.5 && angle > 247.5) arrow = L;
        else if (angle <= 347.5 && angle > 202.0) arrow = BL;
        else if (angle <= 202.0 && angle > 157.5) arrow = B;
        else if (angle <= 157.5 && angle > 112.5) arrow = BR;
        else if (angle <= 112.5 && angle > 067.5) arrow = R;
        else if (angle <= 067.5 && angle > 022.5) arrow = FR;

        return arrow;
    }
}