private void demo4_Click(object sender, RoutedEventArgs e)
{
ps.effectors.Add(new AyChamberBox(0, 0, 600, 400));
var dt = 0.01;
var oldMousePosition = AyVector2.Zero;
AyFramework.Start(() =>
{
var velocity = newMousePosition.Subtract(oldMousePosition).Multiply(10);
velocity = velocity.Add(sampleDirection2(0, Math.PI * 2).Multiply(20));
var color = sampleColor(Colors.Red, Colors.Pink);
var life = sampleNumber(2, 4);
var size = sampleNumber(4, 8);
ps.emit(new AyParticle(newMousePosition, velocity, life, color, size));
oldMousePosition = newMousePosition;
ps.simulate(dt);
ps.render(ctx);
var cnt = AyFramework.canvas.Children;
if (cnt.Count > ps.particles.Count())
{
int d = cnt.Count - ps.particles.Count();
AyFramework.canvas.Children.RemoveRange(0, d);
}
});
}
/// <summary>
/// 每帧会发射一个粒子，其位置在画布中间(200,200)，发射方向是360度，速率为100，生命为1秒，红色、半径为5象素
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void demo2_Click(object sender, RoutedEventArgs e)
{
var dt = 0.01;
AyFramework.Start(() =>
{
ps.emit(new AyParticle(new AyVector2(200, 200), sampleDirection().Multiply(100), 1, Colors.Green, 5));
ps.simulate(dt);
AyFramework.clearCanvas();
ps.render(ctx);
});
}
private void demo1_Click(object sender, RoutedEventArgs e)
{
AyFramework.clearCanvas();
var position = new AyVector2(10, 200);
var velocity = new AyVector2(50, -50);
var acceleration = new AyVector2(0, 10);
var dt = 0.1;
AyFramework.Start(() =>
{
position = position.Add(velocity.Multiply(dt));
velocity = velocity.Add(acceleration.Multiply(dt));
ps.CreateEllipse(position.X, position.Y, 5, Colors.Green, Colors.Yellow, ctx);
});
}
void ctx_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
AyFramework.clearCanvas();
var point = e.GetPosition(ctx);
var dt = 0.015;
var ddd = Color.FromRgb(Convert.ToByte(rd.Next(0, 255)), Convert.ToByte(rd.Next(0, 255)), Convert.ToByte(rd.Next(0, 255)));
AyFramework.stop();
AyFramework.Start(() =>
{
ps.emit(new AyParticle(new AyVector2(point.X, point.Y), sampleDirection().Multiply(100), 1, ddd, 5));
ps.simulate(dt);
AyFramework.clearCanvas();
ps.render(ctx);
});
}
private void demo3_Click(object sender, RoutedEventArgs e)
{
ps.effectors.Add(new AyChamberBox(0, 0, 600, 400));
var dt = 0.01;
AyFramework.Start(() =>
{
ps.emit(new AyParticle(new AyVector2(100, 200),
sampleDirection2(Math.PI * 1.75, Math.PI * 2).Multiply(400),
6, sampleColor(Colors.Green, Colors.Yellow), 6));
ps.simulate(dt);
ps.render(ctx);
var cnt = AyFramework.canvas.Children;
if (cnt.Count > ps.particles.Count())
{
int d = cnt.Count - ps.particles.Count();
AyFramework.canvas.Children.RemoveRange(0, d);
}
});
}
