/// <summary>
/// Play the game-over sound effect
/// </summary>
public void PlayGameOverSound()
{
try
{
// A thread is needed to get the sound to play
new Thread(() =>
{
this.PlaySound(50, 500);
}).Start();
}
catch (Exception)
{
// Sometimes thread creation fails. Make sure it doesn't crash the game.
MeadowApp.DebugWriteLine($"Exception in PlayGameOverSound");
}
}
/// <summary>
/// Check for collisions between the ball and the sides, top and bottom of the display,
/// also checking for collisions with the paddle.
/// </summary>
/// <returns>Value indicating that the paddle was missed, signaling game-over</returns>
private bool CheckForCollision()
{
bool isPaddleMissed = false;
bool isBorderHit = false;
int ballCenterX = this.xPosition + (this.width / 2);
MeadowApp.DebugWriteLine($"checkForCollision: {ballCenterX},{this.yPosition}");
if (this.yPosition >= this.maxY)
{
if (ballCenterX >= this.paddle.Left && ballCenterX < this.paddle.Right)
{
// Paddle hit!
this.soundGenerator.PlayPaddleHitSound();
this.scoreKeeper.Increment();
this.GetVelocityChangeAdjustments(ballCenterX, out int extraX, out int extraY);
this.yIncrement = -this.yIncrement;
// Apply the x and y increments
this.ChangeXIncrement(extraX);
this.ChangeYIncrement(extraY);
// Make the paddle smaller
this.paddle.Shrink();
}
else
{
// Missed the paddle. Time to explode...
this.asyncGraphics.Stop();
this.StopMoving();
this.soundGenerator.PlayGameOverSound();
this.Explode();
isPaddleMissed = true;
}
}
else
{
if (this.xPosition >= this.maxX || this.xPosition <= 0)
{
MeadowApp.DebugWriteLine("x border hit");
isBorderHit = true;
this.xIncrement = -this.xIncrement;
this.ChangeYIncrement(0);
}
if (this.yPosition <= this.minY)
{
MeadowApp.DebugWriteLine("y border hit");
isBorderHit = true;
this.yIncrement = -this.yIncrement;
this.ChangeXIncrement(0);
}
if (isBorderHit)
{
this.soundGenerator.PlayBorderHitSound();
}
}
MeadowApp.DebugWriteLine($"leaving checkForCollision: {isPaddleMissed}");
return(isPaddleMissed);
}
/// <summary>
/// Event handler called when the movement timer elapses
/// </summary>
/// <param name="sender">Event sender</param>
/// <param name="e">Event arguments</param>
private void MoveTimer_Elapsed(object sender, ElapsedEventArgs e)
{
try
{
MeadowApp.DebugWriteLine("Move timer elapsed");
if (this.isMoveComplete)
{
this.isMoveComplete = false;
if (!this.CheckForCollision())
{
int oldX = this.xPosition;
int oldY = this.yPosition;
MeadowApp.DebugWriteLine($"Move timer elapsed: {oldX},{oldY} {xIncrement},{yIncrement}");
this.xPosition += this.xIncrement;
if (this.xPosition > this.maxX)
{
this.xPosition = this.maxX;
}
MeadowApp.DebugWriteLine($"new x = {this.xPosition}");
if (this.xPosition < 0)
{
this.xPosition = 0;
}
this.yPosition += this.yIncrement;
MeadowApp.DebugWriteLine($"new y = {this.yPosition}");
if (this.yPosition > this.maxY)
{
this.yPosition = this.maxY;
}
if (this.yPosition < this.minY)
{
this.yPosition = this.minY;
}
MeadowApp.DebugWriteLine($"new x,y = {this.xPosition},{this.yPosition}");
if (!(this.xPosition == oldX && this.yPosition == oldY))
{
lock (this.asyncGraphics.LockObject)
{
if (this.moveTimer.Enabled)
{
this.Draw(oldX, oldY, this.backgroundColor);
this.Draw(this.xPosition, this.yPosition, this.color);
}
}
}
}
this.isMoveComplete = true;
}
MeadowApp.DebugWriteLine("leaving move timer elapsed");
}
catch (Exception ex)
{
MeadowApp.DebugWriteLine($"Exception in MoveTimer_Elapsed: {ex}");
this.isMoveComplete = true;
}
}