// 跳跃上升
var jumpUp = cc.moveBy(this.jumpDuration, cc.v2(0, this.jumpHeight))
    .easing(cc.easeCubicActionOut());

// 下落
var jumpDown = cc.moveBy(this.jumpDuration, cc.v2(0, -this.jumpHeight))
    .easing(cc.easeCubicActionIn());

// 不断重复
return cc.repeatForever(cc.sequence(jumpUp, jumpDown));

cc.sequence(
    cc.scaleTo(dua, 0.8, 0.8),
    cc.scaleTo(dua, 1, 1),
    cc.callFunc(() => {
        paopaoNode.destroy();
    })
);

var rotationTo = cc.rotateTo(1, 0, 180);
this.paiNode.runAction(rotationTo);

var seq = cc.sequence(
    cc.rotateTo(0.2, 15),
    cc.rotateTo(0.4, -15),
    cc.rotateTo(0.4, 15),
    cc.rotateTo(0.4, -15),
    cc.rotateTo(0.4, 15),
    cc.rotateTo(0.2, 0),
    cc.delayTime(2)
);
this.node.runAction(cc.repeatForever(seq));

// 在按钮的触摸开始/结束时分别放大与恢复
buttonNode.on(cc.Node.EventType.TOUCH_START, () => {
    buttonNode.runAction(cc.scaleTo(0.1, 1.1, 1.1));
});
buttonNode.on(cc.Node.EventType.TOUCH_END, () => {
    buttonNode.runAction(cc.scaleTo(0.1, 1.0, 1.0));
});

cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);

onKeyDown(event) {
    switch(event.keyCode) {
        case cc.macro.KEY.a:
            this.accLeft = true;
            break;
        case cc.macro.KEY.d:
            this.accRight = true;
            break;
    }
}

this.node.on('touchstart', this.touchStart, this);
this.node.on('touchend',   this.touchEnd,   this);

var pos = cc.v2(randX, randY);
newStar.setPosition(pos);

// 计算当前节点与玩家之间的距离
var dist = this.node.position.sub(playerPos).mag();

// 返回向量长度
var len = dir.mag();

// 自加（修改原向量）
v.addSelf(cc.v2(5, 5));

// 返回新向量（不修改原向量）
var vnew = v.add(cc.v2(5, 5));

// 缩放
var v = cc.v2(10, 10);
v.mul(5);   // 返回 Vec2 {x: 50, y: 50}
console.log(v); // 仍打印 Vec2 {x: 10, y: 10}

// 判断相等
var res = v.equals(cc.v2(10, 10)); // true

var v  = cc.v2(10, 10);
var v1 = cc.v2(5, 5);
var v3 = cc.v2(0, 0); // 存储结果
v.lerp(v1, 0.5, v3);  // 在 v 与 v1 之间取 50%
console.log(v3);      // Vec2 {x: 7.5, y: 7.5}

cc.director.loadScene('game');

// 暂停游戏逻辑，但渲染和 UI 响应仍在
cc.director.pause();

// 恢复
cc.director.resume();

update(dt) {
    this.node.opacity -= 100 * dt;
    if (this.node.opacity <= 0) {
        this.node.destroy();
    }
}

properties: {
    scoreAudio: {
        default: null,
        type: cc.AudioClip
    }
}

// 播放音效（false 表示不循环）
cc.audioEngine.playEffect(this.scoreAudio, false);

newStar.getComponent('Star').game = this;

var winSize = cc.director.getWinSize();

var first_xMax = bgList[0].getBoundingBox().xMax;

cc.loader.load(
    { url: "res/raw-assets/resource/texture/gold.png", type: 'png' },
    (err, texture) => {
        var fra   = this.spr2.getComponent(cc.Sprite);
        var sframe = new cc.SpriteFrame(
            texture,
            new cc.rect(20, 20, 100, 120)
        );
        fra.spriteFrame = sframe;
    }
);

cc.loader.loadRes(`prefab/game08/${randIdx}`, cc.Prefab, (err, res) => {
    this.drawing = cc.instantiate(res);
    this.drawing.group = "drawing";
});

// 写入
cc.sys.localStorage.setItem("finishLevel", this.curLevel);

// 读取（注意转换类型，localStorage 只存字符串）
var level = parseInt(cc.sys.localStorage.getItem("finishLevel") || 0);

// this.node 为 Camera 节点
update(dt) {
    var targetPos = this.player.position;
    this.node.position = targetPos;
}

update(dt) {
    var targetPos = this.player.position;
    var currentPos = this.node.position;
    currentPos.lerp(targetPos, 0.1, currentPos);
    this.node.position = currentPos;
}

cc.log("只在发布时勾选调试模式才起效");

var g = this.node.getComponent(cc.Graphics);
g.moveTo(0, 0);
g.lineTo(100, 100);
g.stroke();

cc.assetManager.loadBundle('level2', (err, bundle) => {
    bundle.loadDir('prefabs', (err, assets) => {
        // ...
    });
});

// cc.RevoluteJoint 可约束两个刚体围绕一个点旋转
var joint = nodeA.addComponent(cc.RevoluteJoint);
joint.connectedBody = nodeB.getComponent(cc.RigidBody);
joint.anchor = cc.v2(0, 0);
joint.connectedAnchor = cc.v2(0, 50);

let fps = (cc.sys.os == cc.sys.OS_IOS) ? 40 : 40;
cc.game.setFrameRate(fps);

if (cc.sys.platform == cc.sys.WECHAT_GAME) {
    wx.setPreferredFramesPerSecond(fps);
}

let frameSize = cc.view.getFrameSize();
let scrall = frameSize.width / frameSize.height;

cc.view.setResolutionPolicy(cc.ResolutionPolicy.EXACT_FIT);
cc.view.setOrientation(cc.macro.ORIENTATION_LANDSCAPE);

cc.Canvas.instance.fitWidth  = false;
cc.Canvas.instance.fitHeight = false;

let isFitWidth = scrall < 1.77;
cc.Canvas.instance.fitWidth  = isFitWidth;
cc.Canvas.instance.fitHeight = !isFitWidth;