18地图相关

获得一张地图指令：

/**
 * @author houyunfei
 */
public class MapExecutor implements CommandExecutor {

    private MapView view;

    {
        /**
         * 给Map添加View视图
         *
         * 通过Bukkit的createMap来生成一个MapView
         */
        view = Bukkit.createMap(Bukkit.getWorlds().get(0));

        // 修改视图的信息
        view.setScale(MapView.Scale.CLOSEST);
        view.setLocked(true);
        view.setTrackingPosition(true);         // 是否追踪玩家，并显示玩家的cursor          true: 显示Cursor，false: 不显示Cursor
        view.setUnlimitedTracking(false);       // 是否在玩家离开View时仍然标注玩家的cursor    true: 标注玩家的cursor，false: 不标注玩家的cursor

        // 删除原有用于渲染世界的Render
        view.getRenderers().forEach(view::removeRenderer);
        // 添加自己的render
        view.addRenderer(new FirstRender());
    }


    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {

        if (sender instanceof Player) {
            Player player = (Player) sender;
            PlayerInventory inventory = player.getInventory();

            // 直接new出Map的物品槽
            ItemStack itemStack = new ItemStack(Material.FILLED_MAP, 1);
            // 既然是可以展示画面的特殊物品，相比也有个对应的Meta
            MapMeta mapMeta = (MapMeta) itemStack.getItemMeta();

            // 设置meta信息
            mapMeta.setLocationName("这是地点：" + player.getLocation().getBlockX() + "," + player.getLocation().getBlockY() + "," + player.getLocation().getBlockZ());
            mapMeta.setColor(Color.fromRGB(255, 0, 0));

            // 以后获取到的都是相同的View
            mapMeta.setMapView(view);

            // 查看默认生成的View信息
            int id = view.getId();
            int centerX = view.getCenterX();
            int centerZ = view.getCenterZ();
            MapView.Scale scale = view.getScale();
            sender.sendMessage("视图id：" + id);
            sender.sendMessage("视图中心点X坐标：" + centerX);
            sender.sendMessage("视图中心点Z坐标：" + centerZ);
            sender.sendMessage("视图缩放比例：" + scale);

            // 获取代码创建的Map信息
            String locationName = mapMeta.getLocationName();
            sender.sendMessage("locationName: " + locationName);

            Color color = mapMeta.getColor();
            sender.sendMessage("color: " + color);


            itemStack.setItemMeta(mapMeta);
            inventory.addItem(itemStack);
            return true;
        }
        sender.sendMessage("只有玩家才能使用此命令");
        return true;

    }
}

渲染地图逻辑：

public class FirstRender extends MapRenderer {

    public FirstRender() {
        /**
         * 不分开渲染
         */
        super(false);

        try {
            image = ImageIO.read(new URL("https://www.baidu.com/img/bd_logo1.png"));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private Image image;

    private MapCursorCollection cursors = new MapCursorCollection();

    {
        MapCursor cursor1 = new MapCursor((byte) 0, (byte) 0, (byte) 4, MapCursor.Type.MANSION, true);
        MapCursor cursor2 = new MapCursor((byte) 0, (byte) 0, (byte) 0, MapCursor.Type.BANNER_PURPLE, true);
        cursors.addCursor(cursor1);
        cursors.addCursor(cursor2);
    }

    public void setImage(Image image) {
        this.image = image;
    }

    /**
     * 高频率调用，所以请务必不要在这里进行很耗时的操作
     */
    @Override
    public void render(MapView map, MapCanvas canvas, Player player) {
       if (null != player) {
           Bukkit.broadcastMessage(player.getName() + "玩家，你好！现在是：" + System.currentTimeMillis());
       } else {
           Bukkit.broadcastMessage("游客，你好！现在是：" + System.currentTimeMillis());
       }

        /**
         * 需改为128 X 128 像素大小的图片
         */
        canvas.drawImage(0, 0, image);
        /**
         * 在View中渲染英文字符（不要带有MinecraftFont.Font中不存在的字符）
         */
        canvas.drawText((int) player.getLocation().getX(), (int) player.getLocation().getZ(), MinecraftFont.Font, "Hello World!");

        MapCursor cursor1 = cursors.getCursor(0);   // 宅邸
        MapCursor cursor2 = cursors.getCursor(1);   // 旗帜

        Location cxk = Bukkit.getPlayer("cxk").getLocation();
        byte x = (byte) cxk.getX();
        byte y = (byte) cxk.getZ();

        Location cxk2 = Bukkit.getPlayer("cxk2").getLocation();
        byte x2 = (byte) cxk2.getX();
        byte y2 = (byte) cxk2.getZ();

        cursor1.setX(x);
        cursor1.setY(y);

        cursor2.setX(x2);
        cursor2.setY(y2);

        canvas.setCursors(cursors);
    }

}