void CreateBlurLayer()
{
var sprite = _rootVisual.Compositor.CreateSpriteVisual().LinkSize(this);
sprite.Brush = CompositionFactory.CreateBlurEffectBrush(_rootVisual.Compositor, 5f);
ShadowHost.GetContainerVisual().Children.InsertAtTop(sprite);
}
void PlantGrassSeed()
{
// 1. Create main grass blade
var shape = CreateGrassBlade(_grassShape);
// 2. Set relative positions
var percent = _rand.Next(0, 10000) / 10000d;
shape.StartAnimation(_grassOffset.SetParameter("percent", percent));
// 3. Start animating
ApplyWind(shape);
// 4. Add to visual tree
BladesHost.GetContainerVisual().Children.InsertAtTop(shape);
// 5. Create the shadow for the blade
var shadow = CreateGrassBlade(_shadowShape);
shadow.RotationAxis = Vector3.UnitZ;
shadow.Scale = shape.Scale;
shadow.StartAnimation(_shadowOffset.SetParameter("Caster", shape));
shadow.StartAnimation(_shadowRotation.SetParameter("Caster", shape));
// 6. Add shadow to tree.
ShadowHost.GetContainerVisual().Children.InsertAtTop(shadow);
}