public ModelViewer()
{
this.InitializeComponent();
// Create a camera and a ContainerVisual
_compositor = Window.Current.Compositor;
var root = _compositor.CreateContainerVisual();
root.Size = new Vector2(1000, 1000);
ElementCompositionPreview.SetElementChildVisual(this, root);
// create a SceneVisual and insert it into the visual tree
_sceneVisual = SceneVisual.Create(_compositor);
root.Children.InsertAtTop(_sceneVisual);
// instantiate viewport and assign it "good" default values
_viewport = new Viewport(_compositor);
_viewport.AttachToVisual(_sceneVisual);
_viewport.Size = Target.ActualSize;
_viewport.Offset = new Vector3(_viewport.Size / 2f, 0f);
// instantiate camera and assign it "good" default values
_camera = new OrbitalCamera(_compositor);
_camera.Target = new Vector3(0f, 0f, 0f);
_camera.Radius = 600f;
_camera.Theta = 0f;
_camera.Phi = MathF.PI / 4;
// instantiate projection and assign it "good" default values
PerspectiveProjection projection = new PerspectiveProjection(_compositor);
projection.Fov = MathF.PI / 2;
_camera.Projection = projection;
_viewport.Camera = _camera;
// add event handler for chaning target size
Target.SizeChanged += Target_SizeChanged;
// event handlers for pointer events
Target.PointerWheelChanged += Target_PointerWheelChanged;
Target.PointerPressed += Target_PointerPressed;
Target.PointerReleased += Target_PointerReleased;
Target.PointerMoved += Target_PointerMoved;
Window.Current.CoreWindow.PointerReleased += CoreWindow_PointerReleased;
}
/// <summary>
/// Creates a Viewport with default properties.
/// Offset = Vector3.Zero
/// Size = Vector2(100, 100)
/// Stretch = Uniform
/// StretchMatrix = Matrix4x4.Identity
/// </summary>
/// <param name="compositor"></param>
/// <exception cref="System.ArgumentException">Thrown when constructor is passed a null value.</exception>
public Viewport(Compositor compositor)
{
if (compositor == null)
{
throw new System.ArgumentException("Compositor cannot be null");
}
_compositor = compositor;
_propertySet = _compositor.CreatePropertySet();
// Create properties of viewport
_propertySet.InsertVector3("Offset", Vector3.Zero);
_propertySet.InsertVector2("Size", new Vector2(100, 100));
_propertySet.InsertScalar("Stretch", (int)Stretch.Uniform);
_propertySet.InsertMatrix4x4("StretchMatrix", Matrix4x4.Identity);
Camera = new OrbitalCamera(_compositor);
StartAnimationsOnStretchMatrix();
}