Display a scene

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// Copyright 2017 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.Views;
using Android.Widget;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using System;
using Surface = Esri.ArcGISRuntime.Mapping.Surface;

namespace ArcGISRuntime.Samples.DisplayScene
{
    [Activity (ConfigurationChanges=Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Display a scene",
        category: "Layers",
        description: "Display a scene with a terrain surface and some imagery.",
        instructions: "When loaded, the sample will display a scene. Pan and zoom to explore the scene.",
        tags: new[] { "3D", "basemap", "elevation", "scene", "surface" })]
    public class DisplayScene : Activity
    {
        // Hold a reference to the scene view.
        private SceneView _mySceneView;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            Title = "Display scene";

            // Execute initialization
            CreateLayout();
            Initialize();
        }

        private void Initialize()
        {
            // Create a new scene
            Scene myScene = new Scene();

            // Crate a new base map using the static/shared create imagery method
            Basemap myBaseMap = new Basemap(BasemapStyle.ArcGISImageryStandard);

            // Add the imagery basemap to the scene's base map property
            myScene.Basemap = myBaseMap;

            // Add scene (with an imagery basemap) to the scene view's scene property
            _mySceneView.Scene = myScene;

            // Create a new surface
            Surface mySurface = new Surface();

            // Define the string that points to the elevation image service
            string myElevationImageService = "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer";

            // Create a Uri from the elevation image service string
            Uri myUri = new Uri(myElevationImageService);

            // Create an ArcGIS tiled elevation
            ArcGISTiledElevationSource myArcGISTiledElevationSource = new ArcGISTiledElevationSource
            {

                // Set the ArcGIS tiled elevation sources property to the Uri of the elevation image service
                Source = myUri
            };

            // Add the ArcGIS tiled elevation source to the surface's elevated sources collection
            mySurface.ElevationSources.Add(myArcGISTiledElevationSource);

            // Set the scene's base surface to the surface with the ArcGIS tiled elevation source
            myScene.BaseSurface = mySurface;

            // Create camera with an initial camera position (Mount Everest in the Alps mountains)
            Camera myCamera = new Camera(28.4, 83.9, 10010.0, 10.0, 80.0, 0);

            // Set the scene view's camera position
            _mySceneView.SetViewpointCameraAsync(myCamera);
        }

        private void CreateLayout()
        {
            // Create a new vertical layout for the app
            LinearLayout layout = new LinearLayout(this) { Orientation = Orientation.Vertical };

            // Add the scene view to the layout
            _mySceneView = new SceneView(this);
            layout.AddView(_mySceneView);

            // Show the layout in the app
            SetContentView(layout);
        }

        protected override void OnDestroy()
        {
            base.OnDestroy();

            // Remove the sceneview
            (_mySceneView.Parent as ViewGroup).RemoveView(_mySceneView);
            _mySceneView.Dispose();
            _mySceneView = null;
        }
    }
}