private void ShootTimerTickEventHandler(object sender, EventArgs e)
{
isRunning = true;
restOfBalls--;
UcBall ball = new UcBall();
//Canvas.SetTop(ball, 0);
// Canvas.SetLeft(ball, 0);
TranslateTransform transform = ball.RenderTransform as TranslateTransform;
transform.X = canvasWidth / 2;
transform.Y = 10;
ball.Vx = initialVelocity * Math.Cos(currentAngle);
ball.Vy = initialVelocity * Math.Sin(currentAngle);
if (transform.Y != 0)
{
}
cvs.Children.Add(ball);
balls.Add(ball);
if (restOfBalls <= 0)
{
timer.Stop();
// return;
}
}
private Turn CheckCollision(UcBall ball)
{
Turn result = new Turn(1, 1);
var tempResult = CheckCollisionWithLine(ball, 1, 0, -canvasWidth);
if (tempResult != null)
{
result.Add(tempResult);
}
tempResult = CheckCollisionWithLine(ball, 1, 0, 0);
if (tempResult != null)
{
result.Add(tempResult);
}
foreach (var block in blocks.ToArray())
{
if (block.Count == 0)
{
blocks.Remove(block);
cvs.Children.Remove(block as UIElement);
}
tempResult = block.CheckCollision(ball);
if (tempResult != null)
{
result.Add(tempResult);
}
}
return(result);
}
private bool CheckDie(UcBall ball)
{
if (Mode == GameMode.UpToDownWithGravity)
{
if (ball.Y + R > canvasHeight)
{
ball.Visibility = Visibility.Collapsed;
cvs.Children.Remove(ball);
balls.Remove(ball);
}
}
return(false);
}
private Turn CheckCollisionWithLine(UcBall ball, double a, double b, double c)
{
if (!(a == 0 || b == 0))
{
throw new Exception("a和b必须有一个为0");
}
double distance = Math.Abs(a * ball.X + b * ball.Y + c) / Math.Sqrt(a * a + b * b);
if (distance > R)
{
return(null);
}
if (b == 0)
{
return(new Turn(-1, 1));
}
else
{
return(new Turn(1, -1));
}
}
public void TurnBall(UcBall ball)
{
ball.Vx *= Vx;
ball.Vy *= Vy;
}