Scene layer selection

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 // Copyright 2022 Esri. // // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. // You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific // language governing permissions and limitations under the License.  using Esri.ArcGISRuntime.Data; using Esri.ArcGISRuntime.Mapping;  namespace ArcGIS.Samples.SceneLayerSelection {  [ArcGIS.Samples.Shared.Attributes.Sample(  name: "Scene layer selection",  category: "Layers",  description: "Identify features in a scene to select.",  instructions: "Tap on a building in the scene layer to select it. Deselect buildings by clicking away from the buildings.",  tags: new[] { "3D", "buildings", "identify", "model", "query", "search", "select" })]  public partial class SceneLayerSelection : ContentPage  {  public SceneLayerSelection()  {  InitializeComponent();  _ = Initialize();  }   private async Task Initialize()  {  // Create a new Scene with a topographic basemap.  Scene scene = new Scene(BasemapStyle.ArcGISTopographic);   // Add a base surface with elevation data.  Surface elevationSurface = new Surface();  Uri elevationService = new Uri("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer");  elevationSurface.ElevationSources.Add(new ArcGISTiledElevationSource(elevationService));  scene.BaseSurface = elevationSurface;   // Add a scene layer.  Uri buildingsService = new Uri("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/Buildings_Brest/SceneServer/layers/0");  ArcGISSceneLayer buildingsLayer = new ArcGISSceneLayer(buildingsService);  scene.OperationalLayers.Add(buildingsLayer);   // Assign the Scene to the SceneView.  MySceneView.Scene = scene;   try  {  // Create a camera with an interesting view.  Camera viewCamera = new Camera(48.378, -4.494, 200, 345, 65, 0);   // Set the viewpoint with the camera.  MySceneView.SetViewpointCamera(viewCamera);  }  catch (Exception e)  {  await Application.Current.Windows[0].Page.DisplayAlert("Error", e.ToString(), "OK");  }  }   private async void SceneViewTapped(object sender, Esri.ArcGISRuntime.Maui.GeoViewInputEventArgs e)  {  // Get the scene layer from the scene (first and only operational layer).  ArcGISSceneLayer sceneLayer = (ArcGISSceneLayer)MySceneView.Scene.OperationalLayers.First();   // Clear any existing selection.  sceneLayer.ClearSelection();   try  {  // Identify the layer at the tap point.  // Use a 10-pixel tolerance around the point and return a maximum of one feature.  Point tapPoint = new Point(e.Position.X, e.Position.Y);  IdentifyLayerResult result = await MySceneView.IdentifyLayerAsync(sceneLayer, tapPoint, 10, false, 1);   // Get the GeoElements that were identified (will be 0 or 1 element).  IReadOnlyList<GeoElement> geoElements = result.GeoElements;   // If a GeoElement was identified, select it in the scene.  if (geoElements.Any())  {  GeoElement geoElement = geoElements.FirstOrDefault();  if (geoElement != null)  {  // Select the feature to highlight it in the scene view.  sceneLayer.SelectFeature((Feature)geoElement);  }  }  }  catch (Exception ex)  {  await Application.Current.Windows[0].Page.DisplayAlert("Error", ex.ToString(), "OK");  }  }  } }