Contoh Gesture dengan Gaze Icon

using System;
using System.Collections.Generic;
using Windows.ApplicationModel.Core;
using Urho;
using Urho.Actions;
using Urho.SharpReality;
using Urho.Shapes;
using Urho.Resources;
using Urho.Gui;

namespace HoloUrhoSharp9
{
    internal class Program
    {
        [MTAThread]
        static void Main()
        {
            var appViewSource = new UrhoAppViewSource<HelloWorldApplication>(new ApplicationOptions("Data"));
            appViewSource.UrhoAppViewCreated += OnViewCreated;
            CoreApplication.Run(appViewSource);
        }

        static void OnViewCreated(UrhoAppView view)
        {
            view.WindowIsSet += View_WindowIsSet;
        }

        static void View_WindowIsSet(Windows.UI.Core.CoreWindow coreWindow)
        {
            // you can subscribe to CoreWindow events here
        }
    }

    public class HelloWorldApplication : StereoApplication
    {
        Node earthNode;

        public HelloWorldApplication(ApplicationOptions opts) : base(opts) { }

        protected override async void Start()
        {
            // Create a basic scene, see StereoApplication
            base.Start();

            // Enable input
            EnableGestureManipulation = true;
            EnableGestureTapped = true;

            // Create a node for the Earth
            earthNode = Scene.CreateChild();
            earthNode.Position = new Vector3(0, 0, 1.5f); //1.5m away
            earthNode.SetScale(0.3f); //D=30cm
            earthNode.Name = "Bumi";

            // Scene has a lot of pre-configured components, such as Cameras (eyes), Lights, etc.
            DirectionalLight.Brightness = 1f;
            DirectionalLight.Node.SetDirection(new Vector3(-1, 0, 0.5f));

            //Sphere is just a StaticModel component with Sphere.mdl as a Model.
            var earth = earthNode.CreateComponent<Sphere>();
            earth.Material = Material.FromImage("Textures/Earth.jpg");

            var moonNode = earthNode.CreateChild();
            moonNode.SetScale(0.27f); //27% of the Earth's size
            moonNode.Position = new Vector3(1.2f, 0, 0);
            moonNode.Name = "Bulan";
            // Same as Sphere component:
            var moon = moonNode.CreateComponent<StaticModel>();
            moon.Model = CoreAssets.Models.Sphere;

            moon.Material = Material.FromImage("Textures/Moon.jpg");

            // Run a few actions to spin the Earth, the Moon and the clouds.
            earthNode.RunActions(new RepeatForever(new RotateBy(duration: 1f, deltaAngleX: 0, deltaAngleY: -4, deltaAngleZ: 0)));
            await TextToSpeech("Hello world from UrhoSharp!");

            // More advanced samples can be found here:
            // https://github.com/xamarin/urho-samples/tree/master/HoloLens

            Text text = new Text(Context);
            text.Value = ".";
            text.HorizontalAlignment = HorizontalAlignment.Center;
            text.VerticalAlignment = VerticalAlignment.Center;
            text.Position = new IntVector2(0, 0);
            text.SetColor(Color.White);
            text.SetFont(CoreAssets.Fonts.AnonymousPro, 30);
            UI.Root.AddChild(text);

            //Kalau Pake Gambar
            Sprite crosshair = new Sprite(Context);
            crosshair.Texture = ResourceCache.GetTexture2D(@"Data/crosshair.png");
            crosshair.SetAlignment(HorizontalAlignment.Center, VerticalAlignment.Center);
            crosshair.Position = new IntVector2(0, 0);
            crosshair.SetSize(25, 25);
            UI.Root.AddChild(crosshair);


        }

        // For HL optical stabilization (optional)
        public override Vector3 FocusWorldPoint => earthNode.WorldPosition;

        //Handle input:

        Vector3 earthPosBeforeManipulations;
        public override void OnGestureManipulationStarted() => earthPosBeforeManipulations = earthNode.Position;
        public override void OnGestureManipulationUpdated(Vector3 relativeHandPosition) =>
            earthNode.Position = relativeHandPosition + earthPosBeforeManipulations;

        public override async void OnGestureTapped() {
            Ray cameraRay = RightCamera.GetScreenRay(0.5f, 0.5f);

            var result = Scene.GetComponent<Octree>().RaycastSingle(cameraRay, RayQueryLevel.Triangle, 100, DrawableFlags.Geometry, 0x70000000);

            if (result != null && result.Value.Node.Name == "Bumi")
            {
                //Lakukan Aksi disini
                await TextToSpeech("Ini Bumi");
            }

        }

        public override async void OnGestureDoubleTapped() {
            Ray cameraRay = RightCamera.GetScreenRay(0.5f, 0.5f);

            var result = Scene.GetComponent<Octree>().RaycastSingle(cameraRay, RayQueryLevel.Triangle, 100, DrawableFlags.Geometry, 0x70000000);

            if (result != null && result.Value.Node.Name == "Bulan")
            {
                //Lakukan Aksi disini
                await TextToSpeech("Ini Bulan");
            }
        }
    }
}