点击让模型高亮显示并显示其信息

1. 首选确认的模型能够根据id，区分子模型，3D Tiles是支持的。如果你能得到左侧的列表，相信每一个列表项对应一个子模型（模型的一个部分）
2. 拾取：设置鼠标点击事件，比如左击，然后pick出来，时是否会命中对应的子模型，如果是，可以高亮，然后根据id去数据库读取相关信息，div打出来即可。

        // 鼠标左击事件
        handler.setInputAction(function onLeftClick(movement) {
            if (!picking) return;        
    
            const pickedFeature = viewer.scene.pick(movement.position);
            if (Cesium.defined(pickedFeature) &&
                pickedFeature instanceof Cesium.Cesium3DTileFeature &&
                pickedFeature.tileset === tileset) {
                console.log(pickedFeature.id);
                const dbId = getFeatureDbId(pickedFeature);
                if (dbId === selectedDbId) {
                    clearSelected();
                } else {
                    setSelected(dbId);
                }
                
            } else {
                clearSelected();
            }
        }, Cesium.ScreenSpaceEventType.LEFT_CLICK);

        // 鼠标右击事件-弹出菜单列表
        handler.setInputAction(function onRightClick(movement) {
            if (!picking) return;
            console.log(movement.position);
            const pickedFeature = viewer.scene.pick(movement.position);
            // 3dtiles右击
            if (Cesium.defined(pickedFeature) &&
                pickedFeature instanceof Cesium.Cesium3DTileFeature &&
                pickedFeature.tileset === tileset) {
                const dbId = getFeatureDbId(pickedFeature);
                var cartesian = labelEntity.cartesian;
                if (Cesium.defined(cartesian)) {
                    menuCartesian = cartesian;
                    $("#menuList").css("display", "block");
                    $("#menuList").css("left", movement.position.x);
                    $("#menuList").css("top", movement.position.y);
                }
            }
        }, Cesium.ScreenSpaceEventType.RIGHT_CLICK);

你的小棍棍 单体化gltf方式加载吧，当然3dtiles也是可以的，下面的代码是gltf方式的，高亮，与属性获取，弹窗自备：

picFeature(viewer) {
            var fragmentShaderSource =
                "uniform sampler2D colorTexture;\n" +
                "varying vec2 v_textureCoordinates;\n" +
                "uniform vec4 highlight;\n" +
                "void main() {\n" +
                "    vec4 color = texture2D(colorTexture, v_textureCoordinates);\n" +
                "    if (czm_selected()) {\n" +
                "        vec3 highlighted = highlight.a * highlight.rgb + (1.0 - highlight.a) * color.rgb;\n" +
                "        gl_FragColor = vec4(highlighted, 1.0);\n" +
                "    } else { \n" +
                "        gl_FragColor = color;\n" +
                "    }\n" +
                "}\n";
            var stage = viewer.scene.postProcessStages.add(
                new Cesium.PostProcessStage({
                    fragmentShader: fragmentShaderSource,
                    uniforms: {
                        highlight: function() {
                            return new Cesium.Color(1.0, 0.0, 0.0, 0.5);
                        }
                    }
                })
            );
            stage.selected = [];

            viewer.screenSpaceEventHandler.setInputAction(movement => {
                var pickedFeature = viewer.scene.drillPick(
                    movement.position,
                    10,
                    10,
                    10
                );

                if (!Cesium.defined(pickedFeature)) {
                    stage.selected = [];
                    return;
                }
                if (pickedFeature.length == 0) {
                    stage.selected = [];
                    return;
                }

                let pickedObject = pickedFeature[0];
				//f12看下你选中对象的相关属性吧
                if (Cesium.defined(pickedObject) && pickedObject.id != null) {
                    let properties = pickedObject.id.properties.sign.getValue();

                    this.tname = properties.name;
                    this.tid = properties.id;
                    this.type = properties.type;
                }

                if (Cesium.defined(pickedObject)) {
                    stage.selected = [pickedObject.primitive];
                } else {
                    stage.selected = [];
                }
            }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
        }