private void RenderFrame(object sender, EventArgs e)
{
if (ellipses.Count == 0)
{
// Animation just started. Create the ellipses.
int halfCanvasWidth = (int)canvas.ActualWidth / 2;
Random rand = new Random();
int ellipseCount = rand.Next(minEllipses, maxEllipses+1);
for (int i = 0; i < ellipseCount; i++)
{
Ellipse ellipse = new Ellipse();
ellipse.Fill = Brushes.LimeGreen;
ellipse.Width = ellipseRadius;
ellipse.Height = ellipseRadius;
Canvas.SetLeft(ellipse, halfCanvasWidth + rand.Next(-halfCanvasWidth, halfCanvasWidth));
Canvas.SetTop(ellipse, 0);
canvas.Children.Add(ellipse);
EllipseInfo info = new EllipseInfo(ellipse, speedRatio * rand.Next(minStartingSpeed, maxStartingSpeed));
ellipses.Add(info);
}
}
else
{
for (int i = ellipses.Count-1; i >= 0; i--)
{
EllipseInfo info = ellipses[i];
double top = Canvas.GetTop(info.Ellipse);
Canvas.SetTop(info.Ellipse, top + 1 * info.VelocityY);
if (top >= (canvas.ActualHeight - ellipseRadius*2 - 10))
{
// This circle has reached the bottom.
// Stop animating it.
ellipses.Remove(info);
}
else
{
// Increase the velocity.
info.VelocityY += accelerationY;
}
if (ellipses.Count == 0)
{
// End the animation.
// There's no reason to keep calling this method
// if it has no work to do.
StopRendering();
}
}
}
}
private void RenderFrame(object sender, EventArgs e)
{
if (ellipses.Count == 0)
{
// Animation just started. Create the ellipses.
int halfCanvasWidth = (int)canvas.ActualWidth / 2;
Random rand = new Random();
int ellipseCount = rand.Next(minEllipses, maxEllipses + 1);
for (int i = 0; i < ellipseCount; i++)
{
Ellipse ellipse = new Ellipse();
ellipse.Fill = Brushes.LimeGreen;
ellipse.Width = ellipseRadius;
ellipse.Height = ellipseRadius;
Canvas.SetLeft(ellipse, halfCanvasWidth + rand.Next(-halfCanvasWidth, halfCanvasWidth));
Canvas.SetTop(ellipse, 0);
canvas.Children.Add(ellipse);
EllipseInfo info = new EllipseInfo(ellipse, speedRatio * rand.Next(minStartingSpeed, maxStartingSpeed));
ellipses.Add(info);
}
}
else
{
for (int i = ellipses.Count - 1; i >= 0; i--)
{
EllipseInfo info = ellipses[i];
double top = Canvas.GetTop(info.Ellipse);
Canvas.SetTop(info.Ellipse, top + 1 * info.VelocityY);
if (top >= (canvas.ActualHeight - ellipseRadius * 2 - 10))
{
// This circle has reached the bottom.
// Stop animating it.
ellipses.Remove(info);
}
else
{
// Increase the velocity.
info.VelocityY += accelerationY;
}
if (ellipses.Count == 0)
{
// End the animation.
// There's no reason to keep calling this method
// if it has no work to do.
StopRendering();
}
}
}
}
private void RenderFrame(object sender, EventArgs e)
{
if (_ellipses.Count == 0)
{
// Animation just started. Create the _ellipses.
var halfCanvasWidth = (int)RawCanvas.ActualWidth / 2;
var rand = new Random();
var ellipseCount = rand.Next(MinEllipses, MaxEllipses + 1);
for (var i = 0; i < ellipseCount; i++)
{
var ellipse = EllipseInfo.CreateEllipse();
Canvas.SetLeft(ellipse, halfCanvasWidth + rand.Next(-halfCanvasWidth, halfCanvasWidth));
Canvas.SetTop(ellipse, 0);
RawCanvas.Children.Add(ellipse);
var info = new EllipseInfo(ellipse, SpeedRatio * rand.Next(MinStartingSpeed, MaxStartingSpeed));
_ellipses.Add(info);
}
}
else
{
for (var i = _ellipses.Count - 1; i >= 0; i--)
{
var info = _ellipses[i];
var top = Canvas.GetTop(info.Ellipse);
Canvas.SetTop(info.Ellipse, top + 1 * info.VelocityY);
if (top >= RawCanvas.ActualHeight - EllipseInfo.EllipseRadius * 2 - 10)
{
// This circle has reached the bottom.
// Stop animating it.
_ellipses.Remove(info);
}
else
{
// Increase the velocity.
info.VelocityY += AccelerationY;
}
if (_ellipses.Count == 0)
{
// End the animation.
// There's no reason to keep calling this method
// if it has no work to do.
StopRendering();
}
}
}
}
