///<summary>Causes a rotating rectangle that grows and fades in then shrinks and fades out to be shown.</summary>
public static Lifetime AnimateSpinningRectangleExplosion(this Game game,
PerishableCollection <UIElement> controls,
Func <double, Point> position,
Color color,
TimeSpan duration,
double rotationsPerSecond,
double finalRadius)
{
var rect = new Rectangle {
RenderTransformOrigin = new Point(0.5, 0.5)
};
var life = game.AnimateWith(
duration,
(step, portion, ellapsed) => {
var nearHalfPortion = (portion - 0.5).Abs() * 2;
var radius = 0.LerpTo(finalRadius, 1 - nearHalfPortion);
var pos = position(portion);
rect.Width = rect.Height = radius * 2;
rect.RenderTransform = new TransformGroup {
Children = new TransformCollection {
new RotateTransform(rotationsPerSecond * ellapsed.TotalSeconds * 360),
new TranslateTransform(pos.X - radius, pos.Y - radius)
}
};
rect.Fill = new SolidColorBrush(color.LerpToTransparent(nearHalfPortion));
});
controls.Add(rect, life);
return(life);
}
///<summary>Handles making ellipse controls for each ball in the game, as while as showing their death animations.</summary>
public static void SetupDrawBallsAsControls(this Game game, PerishableCollection <UIElement> controls, TimeSpan deathFadeOutDuration, double deathFinalRadiusFactor)
{
game.Balls.CurrentAndFutureItems().Subscribe(
e => {
// create an ellipse control to visually represent the ball
var ball = e.Value;
var color = ball.Hue.HueToApproximateColor(period: 3);
var ellipseControl = new Ellipse {
Width = ball.Radius * 2,
Height = ball.Radius * 2,
VerticalAlignment = VerticalAlignment.Top,
HorizontalAlignment = HorizontalAlignment.Left,
Fill = new SolidColorBrush(color)
};
// 'root' balls have a black border
if (ball.Generation == 1)
{
ellipseControl.StrokeThickness = 3;
ellipseControl.Stroke = new SolidColorBrush(Colors.Black);
}
// reposition ellipse control during each game loop, until ball is dead
game.LoopActions.Add(
step => ellipseControl.Reposition(ball.Pos, ball.Radius),
e.Lifetime);
// once ball is dead, expand and fade out the ellipse
var controlLifetime = e.Lifetime.ThenResurrect(() =>
game.AnimateWith(
deathFadeOutDuration,
(step, portion, dt) => {
// fade out
ellipseControl.Fill = new SolidColorBrush(color.LerpToTransparent(portion));
// expand
var radius = ball.Radius * 1.LerpTo(deathFinalRadiusFactor, portion);
ellipseControl.Reposition(ball.Pos, radius);
}));
controls.Add(ellipseControl, controlLifetime);
},
game.Life);
}
///<summary>Handles making line controls for each connector in the game, as while as showing their death animations.</summary>
public static void SetupDrawConnectorsAsControls(this Game game,
PerishableCollection <UIElement> controls,
TimeSpan deathFadeDuration,
double deathFinalThicknessFactor,
Color cutBangColor,
TimeSpan cutBangDuration,
double cutBangMaxRadius,
Color propagateBangColor,
TimeSpan propagateBangDuration,
double propagateBangRotationsPerSecond,
double propagateBangMaxRadius)
{
game.Connectors.CurrentAndFutureItems().Subscribe(
e => {
// create a line control to visually represent the line
var con = e.Value;
var thickness = con.Child.Radius * 0.1;
var lineControl = new Line {
Stroke = new SolidColorBrush(Colors.Black),
StrokeThickness = thickness,
};
// reposition line control during each game loop, until the connector is dead
game.LoopActions.Add(
step => lineControl.Reposition(con.Line),
e.Lifetime);
// show a bang if the connector is cut
e.Lifetime.WhenDead(() => {
if (con.CutPoint == null || con.CutDir == null)
{
return;
}
var cutLineControl = new Line {
Stroke = new SolidColorBrush(cutBangColor),
StrokeThickness = thickness,
};
var p = con.CutPoint.Value;
var d = con.CutDir.Value * cutBangMaxRadius;
var life = game.AnimateWith(
cutBangDuration,
(step, prop, elapsed) => {
var c = 1 - (prop - 0.5).Abs() * 2;
cutLineControl.Reposition((p - d * c).To(p + d * c));
cutLineControl.StrokeThickness = prop * cutBangMaxRadius / 2;
cutLineControl.Stroke = new SolidColorBrush(cutBangColor.LerpToTransparent(1 - c));
});
controls.Add(cutLineControl, life);
});
// show a bang travelling along the connector when it dies
e.Lifetime.WhenDead(() =>
game.AnimateSpinningRectangleExplosion(
controls,
p => (con.CutPoint == null ? con.Line.Start : con.CutPoint.Value.ClosestPointOn(con.Line)).To(e.Value.Line.End).LerpAcross(p),
propagateBangColor,
propagateBangDuration,
propagateBangRotationsPerSecond,
propagateBangMaxRadius));
// expand and fade out the line control after the connector dies
var controlLife = e.Lifetime.ThenResurrect(() => game.AnimateWith(
deathFadeDuration,
(step, portion, dt) => {
lineControl.StrokeThickness = thickness * 1.LerpTo(deathFinalThicknessFactor, portion);
lineControl.Stroke = new SolidColorBrush(Colors.Black.LerpToTransparent(portion));
//lineControl.Reposition(e.Value.Line);
}));
controls.Add(lineControl, controlLife);
},
game.Life);
}