public void Update(GameTime gameTime, KeyboardState keyboardState, Ball ball)
{
// this paddle is computer controlled.
if (_cpu)
{
Vector2 center = _position + TEXTURE.Bounds.Center.ToVector2();
Vector2 ball_center = ball.GetBounds().Center.ToVector2();
if (center.Y < ball_center.Y)
{
_position += new Vector2(0, Math.Min(SPEED * gameTime.ElapsedGameTime.Milliseconds / 1000.0f,
ball_center.Y - center.Y));
}
else if (center.Y > ball_center.Y)
{
_position += new Vector2(0, -Math.Min(SPEED * gameTime.ElapsedGameTime.Milliseconds / 1000.0f,
center.Y - ball_center.Y));
}
}
else
{
if (_up_key.HasValue && keyboardState.IsKeyDown(_up_key.Value))
{
_position += new Vector2(0, -SPEED * gameTime.ElapsedGameTime.Milliseconds / 1000.0f);
}
if (_down_key.HasValue && keyboardState.IsKeyDown(_down_key.Value))
{
_position += new Vector2(0, SPEED * gameTime.ElapsedGameTime.Milliseconds / 1000.0f);
}
}
// check for ball collision, and respond accordingly. It's a bit weird
// for the paddles to do this, but since there is only two of them and
// the response is well defined and restricted, its fineeeee.
if (GetBounds().Intersects(ball.GetBounds()))
{
Vector2 ballv = ball.GetVelocity();
ball.SetVelocity(new Vector2(-ballv.X, ballv.Y));
// This is a weird way to check if we are a 'left' or 'right' paddle.
// We want to send the ball towards the middle.
// This isn't really a good physical response, but the game is
// pretty constrained, so it's fineeeee.
if (GetBounds().Center.X < _screen_bounds.Center.X)
{
ball.SetPosition(new Vector2(GetBounds().Right, ball.GetBounds().Top));
}
else
{
ball.SetPosition(new Vector2(
GetBounds().Left - Ball.GetTexture().Width,
ball.GetBounds().Top));
}
}
}
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
KeyboardState keyboardState = Keyboard.GetState();
_ball.Update(gameTime);
_left_paddle.Update(gameTime, keyboardState, _ball);
_right_paddle.Update(gameTime, keyboardState, _ball);
if (_ball.GetBounds().Left < _screen_bounds.Left)
{
// LEFT GOAL!
}
else if (_ball.GetBounds().Right > _screen_bounds.Right)
{
// RIGHT GOAL!
}
base.Update(gameTime);
}
/// <summary>
/// Handles the Tick event of the game_timer control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
private void game_timer_Tick(object sender, EventArgs e)
{
if (!_paused && !_gameOver)
{
foreach (var g in _gameEntities)
{
g.Move();
}
if (_secondPaddle.GetBounds().IntersectsWith(_ball.GetBounds()))
{
var diff = ((_secondPaddle.Y + PaddleHeight / 2.0) - (_ball.Y + BallWidth / 2.0)) / (PaddleHeight / 2.0);
_ball.Angle = 2 * 90 - _ball.Angle + (45 * diff);
if (_ball.Angle < 90 && _ball.Angle > 0)
{
_ball.Angle = 75;
}
else if (_ball.Angle < 0 && _ball.Angle > -90)
{
_ball.Angle = -75;
}
if (ts_random.Checked)
{
_ball.Speed = _rand.Next(1, 4);
}
_ball.X = _secondPaddle.x - BallWidth - 1;
}
if (_firstPaddle.GetBounds().IntersectsWith(_ball.GetBounds()))
{
var diff = ((_firstPaddle.Y + PaddleHeight / 2.0) - (_ball.Y + BallWidth / 2.0)) / (PaddleHeight / 2.0);
_ball.Angle = 2 * 90 - _ball.Angle + (45 * -diff);
if (_ball.Angle > 90 && _ball.Angle < 180)
{
_ball.Angle = 75;
}
else if (_ball.Angle < -90 && _ball.Angle > -180)
{
_ball.Angle = -75;
}
if (ts_random.Checked)
{
_ball.Speed = _rand.Next(1, 4);
}
_ball.X = _firstPaddle.x + PaddleWidth + 1;
}
if (_ball.x < 0 - BallWidth)
{
_gameEntities.Remove(_ball);
_ball = new Ball(new SolidBrush(Color.White), BallWidth, _width / 2 - BallWidth / 2,
_height / 2 - BallWidth / 2, _speed)
{
Angle = _rand.Next(-90, 90) - 180
};
_gameEntities.Add(_ball);
_secondScore.AddPoint(1);
if (_secondScore.Points > 9)
{
_gameOver = true;
_gameOverMessage = "Player 2 wins";
_gameEntities.Remove(_ball);
}
}
if (_ball.x > _width)
{
_gameEntities.Remove(_ball);
_ball = new Ball(new SolidBrush(Color.White), BallWidth, _width / 2 - BallWidth / 2,
_height / 2 - BallWidth / 2, _speed)
{
Angle = _rand.Next(-90, 90)
};
_gameEntities.Add(_ball);
_firstScore.AddPoint(1);
if (_firstScore.Points > 9)
{
_gameOver = true;
_gameOverMessage = "Player 1 wins";
_gameEntities.Remove(_ball);
}
}
if (_ball.Y <= 0 || _ball.Y + BallWidth >= _height)
{
_ball.Angle = -_ball.Angle;
}
}
}
