// Learn TypeScript:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/typescript.html
//  - [English] http://www.cocos2d-x.org/docs/creator/manual/en/scripting/typescript.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://www.cocos2d-x.org/docs/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html
//  - [English] http://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

const {ccclass, property} = cc._decorator;

@ccclass
export default class NewClass extends cc.Component {

    @property(cc.Prefab)
    alienship1: cc.Prefab = null;

    @property(cc.Prefab)
    alienship2: cc.Prefab = null;

    @property(cc.Prefab)
    alienship3: cc.Prefab = null;

    spawnShips() {
        var ships = [this.alienship1, this.alienship2, this.alienship3];
        var ship = cc.instantiate(ships[Math.floor(Math.random() * ships.length)]);
        ship.setPosition(Math.random() * 800 - 400, this.node.position.y + ship.getContentSize().height * 5);
        this.node.addChild(ship);
    }

    onLoad () {
        var manager = cc.director.getCollisionManager();
        manager.enabled = true;
    }

    start () {

    }

    // update (dt) {}
}