// Learn cc.Class:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/class.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/class.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://docs.cocos2d-x.org/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] https://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html
var _vec3_temp_1 = cc.v3()


cc.Class({
    extends: cc.Camera,

    properties: {
        // foo: {
        //     // ATTRIBUTES:
        //     default: null,        // The default value will be used only when the component attaching
        //                           // to a node for the first time
        //     type: cc.SpriteFrame, // optional, default is typeof default
        //     serializable: true,   // optional, default is true
        // },
        // bar: {
        //     get () {
        //         return this._bar;
        //     },
        //     set (value) {
        //         this._bar = value;
        //     }
        // },
    },

    // LIFE-CYCLE CALLBACKS:

    // onLoad () {},

    start () {
        this.zangle = 0
        this.node.y = -this.zangle
    },
    beforeDraw(){
         let node = this.node;
        
        if (!this._matrixDirty && !node._worldMatDirty)
            return;

        let camera = this._camera;
        let fov = Math.atan(Math.tan(this._fov/2) / this.zoomRatio)*2;
        camera.setFov(fov);

        let height = cc.game.canvas.height / cc.view._scaleY;

        let targetTexture = this._targetTexture;
        if (targetTexture) {
            height = targetTexture.height;
        }

        node._updateWorldMatrix();
        _vec3_temp_1.x = node._worldMatrix.m12;
        _vec3_temp_1.y = node._worldMatrix.m13+this.zangle;
        _vec3_temp_1.z = 0;

        node.z = height / 1.155//(Math.tan(this._fov/2) * 2);
        node.lookAt(_vec3_temp_1);

        this._matrixDirty = false;
        camera.dirty = true;
        // 
        // 
        

        
    },
    // update (dt) {},
});