public static void BallBrickCollision(Ball ball, Vector2 colPoint, Brick brick)
{
float ballMiddle = (ball.X + (ball.Width / 2));
if (colPoint.Y >= (brick.Y + brick.Height - 1) ||
(colPoint.Y <= (brick.Y) && (ballMiddle > brick.X || ballMiddle < (brick.X + brick.Width))))
{
ball.ChangeVertDirection();
}
else if (ball.MidY > (brick.Y + brick.Height) && ball.SpeedY < 0)
{
ball.ChangeVertDirection();
ball.ChangeHorzDirection();
}
else
{
ball.ChangeHorzDirection();
}
}
public static bool CheckBallScreenCollision(Ball ball, ref float delayTimer)
{
int maxX = Game1.graphics.GraphicsDevice.Viewport.Width - ball.Width;
int maxY = Game1.graphics.GraphicsDevice.Viewport.Height - ball.Height;
// Check for bounce. Make sure to place ball back inside the screen
// or it could remain outside the screen on the next iteration and cause
// a back-and-forth bouncing logic error.
if (ball.X > maxX)
{
ball.ChangeHorzDirection();
ball.X = maxX;
return(false);
}
else if (ball.X < 0)
{
ball.ChangeHorzDirection();
ball.X = 0;
return(false);
}
if (ball.Y < 0)
{
ball.ChangeVertDirection();
ball.Y = 0;
return(false);
}
else if (ball.Y > maxY)
{
// Game over - reset ball
Game1.crashSound.Play();
ball.Reset();
// Reset timer and stop ball's Update() from executing
delayTimer = 0;
ball.Enabled = false;
return(true);
}
return(false);
}
public static void BallPaddleCollision(Ball ball, Paddle paddle)
{
// If hitting the side of the paddle the ball is coming toward,
// switch the ball's horz direction
float ballMiddle = (ball.X + (ball.Width / 2));
float paddleMiddle = (paddle.X + paddle.Width) / 2;
if ((ballMiddle < paddle.X && ball.SpeedX > 0) ||
(ballMiddle > (paddle.X + paddle.Width) && ball.SpeedX < 0))
{
ball.ChangeHorzDirection();
}
// Go back up the screen and speed up
ball.ChangeVertDirection();
ball.SpeedUp();
}
