Cesium realizes the monomer of buildings (divided into buildings and layers)

For a building, it is necessary to realize monomer ：

1. First of all, it has its own advantages 3dtiles Model , Load into the scene ;

2. stay GIS In software , Create a face layer to outline the building vector contour （ An outline is called an element ）

        2.1 have access to ArcGIS perhaps QGIS Open the corresponding image , Sketch

        2.2 If layered monomer is required , The floor height needs to be increased in the element 、 Building height attribute （ Used in cesium Draw the specified height and position in box）

        remarks ： If there are conditions , You can use energy to load osgb Software for , Directly outline the three-dimensional contour

3. The face layer drawn in the previous step （ It contains all the architectural elements that need to be monomer ）, Publish as a service that can query elements

        3.1 Can't write back-end code , Use geoserver Server Publishing wfs service .

        3.2 Can write back-end code , Use postgis The database combines with the back-end code to realize the query service .

4. Click the target... In the scene , Obtain the longitude and latitude of the target point , Pass the first 3 Service query element information in step ,

        remarks ： If there are few elements , have access to turf Achieve target query （ No second 3 Step map service ）

5. After the target element is queried , Construct a scene with classificationType Of entity perhaps primitive, Can achieve monomer ;

         Refer to the official example ：Classification - Cesium Sandcastle

6. By setting viewer.scene.invertClassification = true, You can also achieve the mask effect ;

I personally test the implementation process , It can meet the requirements of building separation, layering and monomer .

If you have questions about the steps , Please leave a message , Let me add more details .