Select features in scene layer

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 98 99 100 101 // Copyright 2024 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 // // https://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.  import ArcGIS import SwiftUI  struct SelectFeaturesInSceneLayerView: View {  /// The error shown in the error alert.  @State private var error: Error?   /// The point on the screen where the user tapped.  @State private var tapPoint: CGPoint?   /// The scene layer that is added on top of the scene.  @State private var sceneLayer = ArcGISSceneLayer(url: .brestBuildingService)   /// A scene with topographic basemap and a 3D buildings layer.  @State private var scene: ArcGIS.Scene = {  // Creates a scene and sets an initial viewpoint.  let scene = Scene(basemapStyle: .arcGISTopographic)  // Sets an initial camera location.  let camera = Camera(  latitude: 48.38282,  longitude: -4.49779,  altitude: 40,  heading: 41.65,  pitch: 71.2,  roll: 0  )  // Sets initial viewpoint to camera position at point.  scene.initialViewpoint = Viewpoint(boundingGeometry: camera.location, camera: camera)  // Creates a surface and adds an elevation source.  let surface = Surface()  surface.addElevationSource(ArcGISTiledElevationSource(url: .worldElevationService))  // Sets the surface to the scene's base surface.  scene.baseSurface = surface  return scene  }()   /// Adds feature layer to scene in initialization.  init() {  scene.addOperationalLayer(sceneLayer)  }   var body: some View {  SceneViewReader { sceneViewProxy in  SceneView(scene: scene)  // Captures location of tap on screen.  .onSingleTapGesture { screenPoint, _ in  tapPoint = screenPoint  }  .task(id: tapPoint) {  // Clears the previous selections.  sceneLayer.clearSelection()  do {  guard let locationPoint = tapPoint else { return }  // Gets the identify results from the tap point.  let result = try await sceneViewProxy.identify(  on: sceneLayer,  screenPoint: locationPoint,  tolerance: 10  )  // Gets the first feature from the identify results.  guard let feature = result.geoElements.first as? ArcGISFeature else { return }  // Selects the feature in the scene layer.  sceneLayer.selectFeature(feature)  } catch {  self.error = error  }  }  }  .errorAlert(presentingError: $error)  } }  private extension URL {  /// The URL of a Brest, France buildings scene service.  static var brestBuildingService: URL {  URL(string: "https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/Buildings_Brest/SceneServer/layers/0")!  }   /// The URL of the Terrain 3D ArcGIS REST Service.  static var worldElevationService: URL {  URL(string: "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")!  } }  #Preview {  SelectFeaturesInSceneLayerView() }