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src/Android/Xamarin.Android/Samples/Analysis/ViewshedGeoElement/ViewshedGeoElement.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,218 @@ | ||
| // Copyright 2018 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 Android.App; | ||
| using Android.OS; | ||
| using Android.Widget; | ||
| using ArcGISRuntimeXamarin.Managers; | ||
| using Esri.ArcGISRuntime.Geometry; | ||
| using Esri.ArcGISRuntime.Mapping; | ||
| using Esri.ArcGISRuntime.Symbology; | ||
| using Esri.ArcGISRuntime.UI; | ||
| using Esri.ArcGISRuntime.UI.Controls; | ||
| using Esri.ArcGISRuntime.UI.GeoAnalysis; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using System.Threading.Tasks; | ||
| using System.Timers; | ||
|
|
||
| namespace ArcGISRuntimeXamarin.Samples.ViewshedGeoElement | ||
| { | ||
| [Activity] | ||
| public class ViewshedGeoElement : Activity | ||
| { | ||
| // Create and hold reference to the used SceneView. | ||
| private readonly SceneView _mySceneView = new SceneView(); | ||
|
|
||
| // URLs to the scene layer with buildings and the elevation source | ||
| private readonly Uri _elevationUri = new Uri("https://scene.arcgis.com/arcgis/rest/services/BREST_DTM_1M/ImageServer"); | ||
| private readonly Uri _buildingsUri = new Uri("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/Buildings_Brest/SceneServer/layers/0"); | ||
|
|
||
| // Graphic and overlay for showing the tank | ||
| private readonly GraphicsOverlay _tankOverlay = new GraphicsOverlay(); | ||
| private Graphic _tank; | ||
|
|
||
| // Animation properties | ||
| private MapPoint _tankEndPoint; | ||
|
|
||
| // Units for geodetic calculation (used in animating tank) | ||
| private readonly LinearUnit _metersUnit = (LinearUnit)Unit.FromUnitId(9001); | ||
| private readonly AngularUnit _degreesUnit = (AngularUnit)Unit.FromUnitId(9102); | ||
|
|
||
| protected override async void OnCreate(Bundle bundle) | ||
| { | ||
| base.OnCreate(bundle); | ||
|
|
||
| Title = "Viewshed (GeoElement)"; | ||
|
|
||
| // Create the UI, setup the control references and execute initialization. | ||
| CreateLayout(); | ||
| await Initialize(); | ||
| } | ||
|
|
||
| private async Task Initialize() | ||
| { | ||
| // Create the scene with an imagery basemap. | ||
| _mySceneView.Scene = new Scene(Basemap.CreateImagery()); | ||
|
|
||
| // Add the elevation surface. | ||
| ArcGISTiledElevationSource tiledElevationSource = new ArcGISTiledElevationSource(_elevationUri); | ||
| Surface baseSurface = new Surface | ||
| { | ||
| ElevationSources = { tiledElevationSource } | ||
| }; | ||
| _mySceneView.Scene.BaseSurface = baseSurface; | ||
|
|
||
| // Add buildings. | ||
| _mySceneView.Scene.OperationalLayers.Add(new ArcGISSceneLayer(_buildingsUri)); | ||
|
|
||
| // Configure the graphics overlay for the tank and add the overlay to the SceneView. | ||
| _tankOverlay.SceneProperties.SurfacePlacement = SurfacePlacement.Relative; | ||
| _mySceneView.GraphicsOverlays.Add(_tankOverlay); | ||
|
|
||
| // Configure the heading expression for the tank; this will allow the | ||
| // viewshed to update automatically based on the tank's position. | ||
| SimpleRenderer renderer3D = new SimpleRenderer(); | ||
| renderer3D.SceneProperties.HeadingExpression = "[HEADING]"; | ||
| _tankOverlay.Renderer = renderer3D; | ||
|
|
||
| // Create the tank graphic - get the model path. | ||
| string modelPath = await GetModelPath(); | ||
| // - Create the symbol and make it 10x larger (to be the right size relative to the scene). | ||
| ModelSceneSymbol tankSymbol = await ModelSceneSymbol.CreateAsync(new Uri(modelPath), 10); | ||
| // - Adjust the position. | ||
| tankSymbol.Heading = 90; | ||
| // - The tank will be positioned relative to the scene surface by its bottom | ||
| // This ensures that the tank is on the ground rather than partially under it. | ||
| tankSymbol.AnchorPosition = SceneSymbolAnchorPosition.Bottom; | ||
| // - Create the graphic. | ||
| _tank = new Graphic(new MapPoint(-4.506390, 48.385624, SpatialReferences.Wgs84), tankSymbol); | ||
| // - Update the heading. | ||
| _tank.Attributes["HEADING"] = 0.0; | ||
| // - Add the graphic to the overlay. | ||
| _tankOverlay.Graphics.Add(_tank); | ||
|
|
||
| // Create a viewshed for the tank. | ||
| GeoElementViewshed geoViewshed = new GeoElementViewshed( | ||
| geoElement: _tank, | ||
| horizontalAngle: 90.0, | ||
| verticalAngle: 40.0, | ||
| minDistance: 0.1, | ||
| maxDistance: 250.0, | ||
| headingOffset: 0.0, | ||
| pitchOffset: 0.0) | ||
| { | ||
| // Offset viewshed observer location to top of tank. | ||
| OffsetZ = 3.0 | ||
| }; | ||
|
|
||
| // Create the analysis overlay and add to the scene. | ||
| AnalysisOverlay overlay = new AnalysisOverlay(); | ||
| overlay.Analyses.Add(geoViewshed); | ||
| _mySceneView.AnalysisOverlays.Add(overlay); | ||
|
|
||
| // Create a camera controller to orbit the tank. | ||
| OrbitGeoElementCameraController cameraController = new OrbitGeoElementCameraController(_tank, 200.0) | ||
| { | ||
| CameraPitchOffset = 45.0 | ||
| }; | ||
| // - Apply the camera controller to the SceneView. | ||
| _mySceneView.CameraController = cameraController; | ||
|
|
||
| // Create a timer; this will enable animating the tank. | ||
| Timer animationTimer = new Timer(60) | ||
| { | ||
| Enabled = true, | ||
| AutoReset = true | ||
| }; | ||
| // - Move the tank every time the timer expires. | ||
| animationTimer.Elapsed += (o, e) => | ||
| { | ||
| AnimateTank(); | ||
| }; | ||
| // - Start the timer. | ||
| animationTimer.Start(); | ||
|
|
||
| // Allow the user to click to define a new destination. | ||
| _mySceneView.GeoViewTapped += (sender, args) => { _tankEndPoint = args.Location; }; | ||
| } | ||
|
|
||
| private void AnimateTank() | ||
| { | ||
| // Return if tank already arrived. | ||
| if (_tankEndPoint == null) | ||
| { | ||
| return; | ||
| } | ||
|
|
||
| // Get current location and distance from the destination. | ||
| MapPoint location = (MapPoint)_tank.Geometry; | ||
| GeodeticDistanceResult distance = GeometryEngine.DistanceGeodetic( | ||
| location, _tankEndPoint, _metersUnit, _degreesUnit, GeodeticCurveType.Geodesic); | ||
|
|
||
| // Move the tank a short distance. | ||
| location = GeometryEngine.MoveGeodetic(new List<MapPoint>() { location }, 1.0, _metersUnit, distance.Azimuth1, _degreesUnit, | ||
| GeodeticCurveType.Geodesic).First(); | ||
| _tank.Geometry = location; | ||
|
|
||
| // Rotate to face the destination. | ||
| double heading = (double)_tank.Attributes["HEADING"]; | ||
| heading = heading + ((distance.Azimuth1 - heading) / 10); | ||
| _tank.Attributes["HEADING"] = heading; | ||
|
|
||
| // Clear the destination if the tank already arrived. | ||
| if (distance.Distance < 5) | ||
| { | ||
| _tankEndPoint = null; | ||
| } | ||
| } | ||
|
|
||
| private async Task<string> GetModelPath() | ||
| { | ||
| // Returns the tank model. | ||
|
|
||
| #region offlinedata | ||
|
|
||
| // The desired model is expected to be called "bradle.3ds". | ||
| string filename = "bradle.3ds"; | ||
|
|
||
| // The data manager provides a method to get the folder. | ||
| string folder = DataManager.GetDataFolder(); | ||
|
|
||
| // Get the full path. | ||
| string filepath = Path.Combine(folder, "SampleData", "ViewshedGeoElement", filename); | ||
|
|
||
| // Check if the file exists. | ||
| if (!File.Exists(filepath)) | ||
| { | ||
| // If the model is missing, download it. | ||
| await DataManager.GetData("07d62a792ab6496d9b772a24efea45d0", "ViewshedGeoElement"); | ||
| } | ||
|
|
||
| // Return the path. | ||
| return filepath; | ||
|
|
||
| #endregion offlinedata | ||
| } | ||
|
|
||
| private void CreateLayout() | ||
| { | ||
| // Create a new vertical layout for the app. | ||
| var layout = new LinearLayout(this) { Orientation = Orientation.Vertical }; | ||
|
|
||
| // Add the map view to the layout. | ||
| layout.AddView(_mySceneView); | ||
|
|
||
| // Show the layout in the app. | ||
| SetContentView(layout); | ||
| } | ||
| } | ||
| } |
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src/Android/Xamarin.Android/Samples/Analysis/ViewshedGeoElement/metadata.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| { | ||
| "Name": "Viewshed (GeoElement)", | ||
| "SampleName": "ViewshedGeoElement", | ||
| "Description": "This sample demonstrates how to display a live viewshed analysis for a moving GeoElement. The analysis is offset vertically so that the viewpoint is from the top of the GeoElement (in this case, a model of a tank).", | ||
| "Instructions": "Tap on the scene to see the tank move to that point.", | ||
| "Type": 0, | ||
| "RequiresOnlineConnection": true, | ||
| "RequiresOfflineData": true, | ||
| "RequiresLocalServer": false, | ||
| "DataItemIds": ["07d62a792ab6496d9b772a24efea45d0"], | ||
| "DataFileNames": ["bradle.3ds"], | ||
| "Image": "ViewshedGeoElement.jpg", | ||
| "Link": "", | ||
| "TypeLink": ["T:Esri.ArcGISRuntime.UI.GeoAnalysis.GeoElementViewshed", | ||
| "M:Esri.ArcGISRuntime.UI.GeoAnalysis.GeoElementViewshed.#ctor(Esri.ArcGISRuntime.Data.GeoElement,System.Double,System.Double,System.Double,System.Double,System.Double,System.Double)", | ||
| "M:Esri.ArcGISRuntime.Geometry.Unit.FromUnitId(System.Int32)", | ||
| "T:Esri.ArcGISRuntime.Geometry.LinearUnit", | ||
| "T:Esri.ArcGISRuntime.Geometry.AngularUnit", | ||
| "P:Esri.ArcGISRuntime.Symbology.RendererSceneProperties.HeadingExpression", | ||
| "T:Esri.ArcGISRuntime.Geometry.GeodeticDistanceResult", | ||
| "F:Esri.ArcGISRuntime.Geometry.GeodeticCurveType.Geodesic", | ||
| "M:Esri.ArcGISRuntime.Geometry.GeometryEngine.MoveGeodetic(System.Collections.Generic.IEnumerable{Esri.ArcGISRuntime.Geometry.MapPoint},System.Double,Esri.ArcGISRuntime.Geometry.LinearUnit,System.Double,Esri.ArcGISRuntime.Geometry.AngularUnit,Esri.ArcGISRuntime.Geometry.GeodeticCurveType)" | ||
| ], | ||
| "SampleFolder": "ViewshedGeoElement" | ||
| } |
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