cc.Class({
    extends: cc.Component,

    properties: {
        m_delayTime: {
            default: 0, 
        },
        m_fluxayTime: {
            default: 1, 
        },
        m_intervalTime: {
            default: 1, 
        },
        m_scale: {
            default: 1, 
        },
        m_angle: {
            default: 0, 
        },
        m_reviseStartTime:{
            default: 0, 
        },
        m_reviseTimeScale:{
            default: 1, 
        },
    },

    ctor(){
        this._time = 0;
    },
    onLoad () {
        this._time -= this.m_delayTime;

        let sprite = this.node.getComponent(cc.Sprite);
        this._material = sprite.getMaterial(0);
        this._material.setProperty("u_scale", this.m_scale);
        this._material.setProperty("u_angle", this.m_angle);

        this.refreshSpriteFrameData();
    },

    update(dt) {
        if (this._time > (this.m_fluxayTime + this.m_intervalTime)) {
            this._time = 0;
        }

        let u_time = this._time/this.m_fluxayTime;
        if(this._time >this.m_fluxayTime)
        {
            u_time = 1+((this._time-this.m_fluxayTime)/this.m_intervalTime);
        }
        if(this.m_reviseTimeScale != null && this.m_reviseStartTime != null)
        {
            u_time = u_time/this.m_reviseTimeScale;
            u_time -= this.m_reviseStartTime;
        }
        this._material.setProperty("u_time", u_time);
        this._time += dt;
    },

    refreshSpriteFrameData(){
        let sprite = this.node.getComponent(cc.Sprite);
        let material = sprite.getMaterial(0);
        let frame = sprite.spriteFrame;

        if(frame != null)
        {
            // xMin
            let l = frame.uv[0];
            // xMax
            let r = frame.uv[6];
            // yMax
            let b = frame.uv[3];
            // yMin
            let t = frame.uv[5];
            // 纹理在合图中的四个边界 uv 坐标
            let u_uvOffset = new cc.Vec4(l, t, r, b);
            // 纹理是否旋转
            let u_uvRotated = frame.isRotated() ? 1.0 : 0.0;
            // 设置材质的属性

            if(material.getProperty("u_uvOffset") !== undefined)
            {
                material.setProperty("u_uvOffset", u_uvOffset);
            }
            if(material.getProperty("u_uvRotated") !== undefined)
            {
                material.setProperty("u_uvRotated", u_uvRotated);
            }
        }
    }

});