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View content beneath terrain surface

Subsurface features

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// Copyright 2019 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.Mapping;
using Esri.ArcGISRuntime.Portal;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using UIKit;

namespace ArcGISRuntimeXamarin.Samples.ViewContentBeneathSurface
{
    [Register("ViewContentBeneathSurface")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        "View content beneath terrain surface",
        "Map",
        "See through terrain in a scene and move the camera underground.",
        "")]
    public class ViewContentBeneathSurface : UIViewController
    {
        // Hold references to UI controls.
        private SceneView _mySceneView;

        public ViewContentBeneathSurface()
        {
            Title = "View content beneath terrain surface";
        }

        private async void Initialize()
        {
            // Load the item from ArcGIS Online.
            PortalItem webSceneItem = await PortalItem.CreateAsync(await ArcGISPortal.CreateAsync(), "91a4fafd747a47c7bab7797066cb9272");

            // Load the web scene from the item.
            Scene webScene = new Scene(webSceneItem);

            // Show the web scene in the view.
            _mySceneView.Scene = webScene;

            // Set the view properties to enable underground navigation.
            // Note: the scene in this sample sets these properties automatically.
            // Scenes authored in this way will be enabled for underground navigation without
            // changing the navigation constraint manually.
            _mySceneView.Scene.BaseSurface.NavigationConstraint = NavigationConstraint.None;
            _mySceneView.Scene.BaseSurface.Opacity = .6;
        }

        public override void LoadView()
        {
            // Create the views.
            View = new UIView();

            _mySceneView = new SceneView();
            _mySceneView.TranslatesAutoresizingMaskIntoConstraints = false;

            // Add the views.
            View.AddSubviews(_mySceneView);

            // Lay out the views.
            NSLayoutConstraint.ActivateConstraints(new[]
            {
                _mySceneView.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                _mySceneView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
                _mySceneView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _mySceneView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor)
            });
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            Initialize();
        }
    }
}

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