// Learn TypeScript:
//  - https://docs.cocos.com/creator/manual/en/scripting/typescript.html
// Learn Attribute:
//  - https://docs.cocos.com/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - https://docs.cocos.com/creator/manual/en/scripting/life-cycle-callbacks.html

const {ccclass, property} = cc._decorator;

@ccclass
export default class NewClass extends cc.Component {

    //方向控制（一開始向右）
    direction = cc.v2(1,0);

    onLoad () {
        //兩種寫法都可以
        cc.systemEvent.on("keydown", this.movedirec, this);
        //cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.movedirec, this);
    }

    movedirec(event:cc.Event.EventKeyboard)
    {
        //設定各種方向的向量
        if(event.keyCode == cc.macro.KEY.right)
            this.direction = cc.v2(1,0);
        else if(event.keyCode == cc.macro.KEY.left)
            this.direction = cc.v2(-1,0);
        else if(event.keyCode == cc.macro.KEY.up)
            this.direction = cc.v2(0,1);
        else if(event.keyCode == cc.macro.KEY.down)
            this.direction = cc.v2(0,-1);
        else if(event.keyCode == cc.macro.KEY.space)
            this.direction = null;
            //原地不動，direction = null;    

    }

    start () {

    }

    update (dt) {
        //1.先取得目前node的坐標=Pos
        var pos = this.node.getPosition();

        //2.然後再加上方向向量(pos = pos + direction)
        //但是要(x,y)分開來加上
        pos.x += this.direction.x;
        pos.y += this.direction.y;

        //3.設定節點node的最新位置
        this.node.setPosition(pos);
    }
}