public override async Task <CompositionDrawingSurface> LoadResources()
{
var graphicsEffect = new ArithmeticCompositeEffect
{
Name = "Arithmetic",
Source1 = new CompositionEffectSourceParameter("ImageSource"),
Source1Amount = .25f,
Source2 = new Transform2DEffect
{
Name = "LightMapTransform",
Source = new CompositionEffectSourceParameter("LightMap")
},
Source2Amount = 0,
MultiplyAmount = 1
};
_effectFactory = _compositor.CreateEffectFactory(graphicsEffect, new[] { "LightMapTransform.TransformMatrix" });
// Create the image
_lightMap = await ImageLoader.Instance.LoadFromUriAsync(new Uri("ms-appx:///Assets/NormalMapsAndMasks/conemap.jpg"));
// Create the animations
float sweep = (float)Math.PI / 10f;
float fullCircle = (float)Math.PI * -2f;
_enterAnimation = _compositor.CreateScalarKeyFrameAnimation();
_enterAnimation.InsertKeyFrame(0.1f, fullCircle);
_enterAnimation.InsertKeyFrame(0.4f, fullCircle + sweep);
_enterAnimation.InsertKeyFrame(0.8f, fullCircle - sweep);
_enterAnimation.InsertKeyFrame(1.0f, fullCircle);
_enterAnimation.Duration = TimeSpan.FromMilliseconds(4500);
_enterAnimation.IterationBehavior = AnimationIterationBehavior.Count;
_enterAnimation.IterationCount = 1;
_exitAnimation = _compositor.CreateScalarKeyFrameAnimation();
_exitAnimation.InsertKeyFrame(1.0f, 0f);
_exitAnimation.Duration = TimeSpan.FromMilliseconds(1000);
_exitAnimation.IterationBehavior = AnimationIterationBehavior.Count;
_exitAnimation.IterationCount = 1;
var propsNode = ExpressionValues.Reference.CreatePropertySetReference("props");
var propsCenterPointOffset = propsNode.GetVector2Property("CenterPointOffset");
var propsRotation = propsNode.GetScalarProperty("Rotation");
var propsScale = propsNode.GetScalarProperty("Scale");
_transformExpressionNode = EF.CreateTranslation(-propsCenterPointOffset) *
EF.Matrix3x2(EF.Cos(propsRotation) * propsScale,
EF.Sin(propsRotation),
-EF.Sin(propsRotation),
EF.Cos(propsRotation) * propsScale,
0,
0) *
EF.CreateTranslation(propsCenterPointOffset + propsNode.GetVector2Property("Translate"));
return(null);
}
