Cesium加载OpenStreetMap buildings

创建建筑白膜：

第一种：加载Geojson建筑物模型数据并渲染

    var viewer = new Cesium.Viewer('cesiumContainer');
    //添加geojson格式地理数据（由shp格式文件转换得来）
    Cesium.Math.setRandomNumberSeed(0);
    var promise =Cesium.GeoJsonDataSource.load('ShangHai3Dtiles.geojson');
    promise.then(function (dataSource) {
        viewer.dataSources.add(dataSource);
        var entities =dataSource.entities.values;
        for (var i = 0; i < entities.length;i++) {
            var entity = entities[i];
            var builingHeight = entity.properties.Floor;
            if(builingHeight>=3&&builingHeight<10){
                entity.polygon.material = Cesium.Color.GOLDENROD;
            }else if(builingHeight>=10&&builingHeight<20){
                entity.polygon.material = Cesium.Color.GRAY;
            }else if(builingHeight>=20&&builingHeight<30){
                entity.polygon.material = Cesium.Color.GHOSTWHITE;
            }else if(builingHeight>=30&&builingHeight<50){
                entity.polygon.material = Cesium.Color.CADETBLUE;
            }else if(builingHeight>=50){
                entity.polygon.material = Cesium.Color.GOLD ;
            }else{
                entity.polygon.material = Cesium.Color.FIREBRICK;
            }
            entity.polygon.outline = false;
            entity.polygon.extrudedHeight =(entity.properties.Floor)*10;
        }
    });
    viewer.flyTo(promise);

第二种：shp转3dtiles格式数据

参考1：https://blog.csdn.net/feixiegis/article/details/98976250  

参考2：https://blog.csdn.net/qq_18144905/article/details/81979807

参考3：https://blog.csdn.net/windydreams/article/details/86296766

第三种：使用内置的

https://cesium.com/learn/cesiumjs-learn/cesiumjs-interactive-building/

cesiumlab生成建筑白膜：https://blog.csdn.net/dyxcome/article/details/86532597

        let handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
        handler.setInputAction(function (movement) {
            var pickingEntity = viewer.scene.pick(movement.position);
            //判断选择是否为Cesium3DTileFeature
            if (pickingEntity instanceof Cesium.Cesium3DTileFeature) {
                //赋值特征颜色
                pickingEntity.color = new Cesium.Color(1.0,0.0,0.0,1.0);
            }
        }, Cesium.ScreenSpaceEventType.LEFT_CLICK);

Cesium对3dtile单个feature进行特效处理：https://blog.csdn.net/weixin_40184249/article/details/107090321