HTML5游戏Phaser。io使武器朝精灵方向开火

我正试着用移相器做一个小游戏。io和我有点小问题。

我用Phaser的武器对象让我的英雄发射子弹。

它工作得很好,除非当我向左转弯时,武器一直向右射击。

this.weapon = game.add.weapon(1500, 'shot');
this.weapon.bulletKillType = Phaser.Weapon.KILL_WORLD_BOUNDS;
this.weapon.bulletSpeed = 750;
this.weapon.fireRate = 2;
this.weapon.bulletAngleVariance = 3;
this.weapon.trackSprite(this, 0, 0, true);

以下是移动功能:

walk = (direction) => {

    var speed;
    if (this.isGrounded) {
        speed = this.accel;
    } else {
        speed = this.airAccel;
    }
    if (direction == "right") {
        if (this.body.velocity.x < this.maxSpeed) {
            this.body.velocity.x += speed;
            this.animations.play('walk', 9, true);
            this.scale.x = 1;
        }

    } else if (direction == "left") {
        if (this.body.velocity.x > -this.maxSpeed) {
            this.body.velocity.x -= speed;
            this.animations.play('walk', 9, true);
            this.scale.x = -1;
        }
    }
}

火灾事件:

if (this.gamepad.justPressed(Phaser.Gamepad.XBOX360_X)) {
    this.weapon.fire(null);
}

我是Phaser的新手,所以如果你在我的代码中看到一些奇怪的东西,请告诉我,我想学习;-)

谢谢你们的帮助。