Change camera controller

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 // Copyright 2023 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 ChangeCameraControllerView: View {  /// A scene with imagery basemap style and a tiled elevation source.  @State private var scene: ArcGIS.Scene = {  // Creates a scene.  let scene = Scene(basemapStyle: .arcGISImageryStandard)   // Sets the initial viewpoint of the scene.  scene.initialViewpoint = Viewpoint(  latitude: .nan,  longitude: .nan,  scale: .nan,  camera: Camera(  lookingAt: Point(  x: -109.937516,  y: 38.456714,  spatialReference: .wgs84  ),  distance: 5500,  heading: 150,  pitch: 20,  roll: 0  )  )   // Creates a surface.  let surface = Surface()   // Creates a tiled elevation source.  let worldElevationServiceURL = URL(  string: "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"  )!  let elevationSource = ArcGISTiledElevationSource(url: worldElevationServiceURL)   // Adds the elevation source to the surface.  surface.addElevationSource(elevationSource)   // Sets the surface to the scene's base surface.  scene.baseSurface = surface  return scene  }()   /// A graphics overlay containing an airplane graphic.  @State private var graphicsOverlay: GraphicsOverlay = {  let planePosition = Point(x: -109.937516, y: 38.456714, z: 5000, spatialReference: .wgs84)  let planeSymbol = ModelSceneSymbol(url: .bristol, scale: 100)  let planeGraphic = Graphic(geometry: planePosition, symbol: planeSymbol)  let graphicsOverlay = GraphicsOverlay(graphics: [planeGraphic])  graphicsOverlay.sceneProperties.surfacePlacement = .absolute  return graphicsOverlay  }()   /// The camera controller kind of the scene view.  @State private var cameraControllerKind: CameraControllerKind = .globe   private enum CameraControllerKind: CaseIterable {  case globe  case plane  case crater   /// A human-readable label for the camera controller kind.  var label: String {  switch self {  case .globe: return "Pan Around Globe"  case .plane: return "Orbit Around Plane"  case .crater: return "Orbit Around Crater"  }  }  }   /// The camera controller of the scene view.  @State private var cameraController: CameraController = GlobeCameraController()   var body: some View {  SceneView(  scene: scene,  cameraController: cameraController,  graphicsOverlays: [graphicsOverlay]  )  .toolbar {  ToolbarItem(placement: .bottomBar) {  Picker("Camera Controller", selection: $cameraControllerKind) {  ForEach(CameraControllerKind.allCases, id: \.self) { kind in  Text(kind.label)  }  }  .task(id: cameraControllerKind) {  cameraController = makeCameraController(kind: cameraControllerKind)  }  }  }  }   /// Creates a camera controller with the given kind of camera controller.  /// - Parameter kind: The camera controller kind.  /// - Returns: A camera controller.  private func makeCameraController(kind: CameraControllerKind) -> CameraController {  switch kind {  case .crater:  let targetLocation = Point(  x: -109.929589,  y: 38.437304,  z: 1700,  spatialReference: .wgs84  )  let cameraController = OrbitLocationCameraController(  target: targetLocation,  distance: 5000  )  cameraController.cameraPitchOffset = 3  cameraController.cameraHeadingOffset = 150  return cameraController  case .plane:  let targetGraphic = graphicsOverlay.graphics.first!  let cameraController = OrbitGeoElementCameraController(  target: targetGraphic,  distance: 5000  )  cameraController.cameraPitchOffset = 30  cameraController.cameraHeadingOffset = 150  return cameraController  case .globe:  return GlobeCameraController()  }  } }  private extension URL {  static var bristol: URL { Bundle.main.url(forResource: "Bristol", withExtension: "dae", subdirectory: "Bristol")! } }