var viewer = new Cesium.Viewer('cesiumContainer', {

    /*帮助*/

    navigationHelpButton: true,

    baseLayerPicker: true,

    geocoder: false,

    /*时间条*/

    timeline: false,

    infoBox: false,

    /*关闭时间动画*/

    animation: false,

    selectionIndicator: false,

    clockViewModel: null,

    imageryProviderViewModels: null,

    dataSources: null

    /*creditContainer:'credit'*/

});

var scene = viewer.scene;

var model = scene.primitives.add(Cesium.Model.fromGltf({

    url: '/files/101.gltf',

    modelMatrix: modelMatrix,

    scale: 1.0

}));

viewer.camera.flyTo({

    destination: Cesium.Cartesian3.fromDegrees(-75.62898254394531, 40.02804946899414, 2.0)

});

var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);

handler.setInputAction(function (click) {

    var pick = viewer.scene.pick(click.position);

    if (!pick ) {

        return;

    }

    if (pick.id === undefined) {

        return;

    }

    //选中某模型   pick选中的对象

    if (Cesium.defined(pick)) {

    }

}, Cesium.ScreenSpaceEventType.LEFT_DOWN);