scene.pick返回的是包含给定窗口位置基元的对象

scene.drillpack返回的是给定窗口位置所有对象的列表

Globe.pick返回的是给光线和地形的交点

Cesium.ScreenSpaceEventType.MIDDLE_CLICK 鼠标中间点击事件

Cesium.ScreenSpaceEventType.MOUSE_MOVE 鼠标移入事件

Cesium.ScreenSpaceEventType.RIGHT_CLICK 鼠标右击事件

Cesium.Ion.defaultAccessToken = '';

var viewer = new Cesium.Viewer('cesiumContainer', {
        animation: false,
        timeline: false
});

var position = new Cesium.Cartesian3.fromDegrees(116.39, 38.9, 0.0);
const entity = viewer.entities.add({
    id:'BlueModel',
    position: position,
    plane: {
        plane: new Cesium.Plane(Cesium.Cartesian3.UNIT_X, 0.0),
        dimensions: new Cesium.Cartesian2(400, 300),
        material: "../testdata/test.png",
        outline: true,
        outlineColor: Cesium.Color.BLACK  
    },
    description:`<div>
                <img width="100%" height="300px" src="../testdata/data.png">
                <h3>你好呀</h3>
                <h3>欢迎学习cesium</h3>
                </div>` 
}) 

viewer.trackedEntity = entity;  //将摄像机视口快速绑定到模型位置 

var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
handler.setInputAction(function (movement){
    var pick = viewer.scene.pick(movement.position);
    if(Cesium.defined(pick) && (pick.id.id ==='BlueModel')){
        alert("欢迎加入")
    }
},Cesium.ScreenSpaceEventType.LEFT_CLICK);  //监听鼠标左键点击事件 

参考链接 9、cesium使用entity进行页面交互效果 - 哔哩哔哩