private void InitializeCompositionVariables()
{
var bounds = ApplicationView.GetForCurrentView().VisibleBounds;
var maxWindowWidth = bounds.Width.ToFloat();
var maxWindowHeight = bounds.Height.ToFloat();
var maxWindowRadius = Math.Max(maxWindowWidth, maxWindowHeight);
// Setup sky visual's size, position, opacity, etc.
_skyVisual = Sky.ContainerVisual();
_skyVisual.Size = new Vector2(maxWindowRadius * SkyVisualAreaRatio);
_skyVisual.Offset = new Vector3(-SkyVisualRadius + maxWindowWidth / 2.0f, -SkyVisualRadius + maxWindowHeight / 2.0f, 0.0f);
_skyVisual.CenterPoint = new Vector3(SkyVisualRadius, SkyVisualRadius, 0.0f);
_skyVisual.Opacity = 0;
_compositor = _skyVisual.Compositor;
_reading = _compositor.CreatePropertySet();
_reading.InsertVector3("Offset", new Vector3(0.0f, 0.0f, 0.0f));
_imageLoader = ImageLoaderFactory.CreateImageLoader(_compositor);
_circleBrush = _compositor.CreateSurfaceBrush();
_circleBrush.Surface = _imageLoader.LoadImageFromUri(new Uri(StarUriString));
if (_inclinometer != null)
{
SetupSkyVisualOffsetExpressionAnimation();
}
}
