如何设置正确的Phaser武器位置

Question

我正在尝试使用武器类，我发现了一些问题。

这是我的代码：

var game = new Phaser.Game(640, 360, Phaser.AUTO);

var GameState = {
    preload: function(){
        game.load.image('player', 'assets/images/player.png');
        game.load.image('enemyBody', 'assets/images/enemyBody.png');
        game.load.image('bullet', 'assets/images/bullet.png');
    },
    create: function(){
        this.player = game.add.sprite(game.world.centerX, game.world.centerY, 'player');
        this.enemy = game.add.sprite(500, 200, 'enemyBody');

        //this.makeShoot();

        this.enterKey = this.game.input.keyboard.addKey(Phaser.Keyboard.ENTER);
        this.enterKey.onDown.add(this.pressEnterKey, this);

    },
    pressEnterKey: function(){
        this.makeShoot();
    },
    makeShoot: function(){
        this.player.rotation = this.game.physics.arcade.angleBetween(this.player, this.enemy);

        this.bullet = game.add.weapon(1, 'bullet');
        this.bullet.trackSprite(this.player, 0, 0, true);
        this.bullet.fire();
    }
};

game.state.add('GameState', GameState);
game.state.start('GameState');

当代码执行时，在第一次按Enter后，子弹出现在（0,0），然后子弹出现在玩家位置。

如果我从注释行中删除注释，它将完美无缺。

我的错误在哪里？

Answer 1

武器和子弹是两个不同的东西。您需要在create()方法中初始化武器实例，然后在makeShoot()方法中生成项目符号，如下所示：

create: function(){
    this.player = ...
    this.weapon = this.add.weapon(1, 'bullet');
    this.weapon.trackSprite(this.player, 0, 0, true);
    ...
},

makeShoot: function(){
    this.player.rotation = this.physics.arcade.angleBetween(this.player, this.enemy);

    this.weapon.fire();
}