; (function (Cesium) {
    checkSkyScenery(Cesium);

    /**
     * @description: 日照阴影效果模拟
     * @param {*} _viewer
     * @param {*} _speed：变化速率
     * @return {*}
     */
    function LightingShadow(_viewer, _speed) {

        // 赋值
        this.viewer = _viewer;
        this._speed = _speed;
        this.open();
    }

    Object.defineProperties(LightingShadow.prototype, {
        speed: {
            get: function () {
                return this._speed
            },
            set: function (e) {
                this._speed = e
                this.viewer.clock.multiplier = e
            }
        },
    })

    LightingShadow.prototype.open = function () {
        // 保留
        this.enableLighting = this.viewer.scene.globe.enableLighting
        this.shadows = this.viewer.shadows
        this.multiplier = this.viewer.clock.multiplier

        this.viewer.scene.globe.enableLighting = true;
        this.viewer.shadows = true;
        this.viewer.clock.multiplier = Cesium.defaultValue(this.speed, 5000);
    }
    LightingShadow.prototype.close = function () {
        this.viewer.scene.globe.enableLighting = this.enableLighting
        this.viewer.shadows = this.shadows
        this.viewer.clock.multiplier = this.multiplier
    }
    Cesium.LightingShadow = LightingShadow

}(SkyScenery));