/// <summary>
/// Allows the game to run logic such as updating the world.
/// </summary>
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed ||
Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
var screenBounds = GraphicsDevice.Viewport.Bounds;
var touchState = Keyboard.GetState();
//Down paddle control
if (touchState.IsKeyDown(Keys.Left))
{
PaddleBottom.X -= (float)(PaddleBottom.Speed * gameTime.ElapsedGameTime.TotalMilliseconds);
}
if (touchState.IsKeyDown(Keys.Right))
{
PaddleBottom.X += (float)(PaddleBottom.Speed * gameTime.ElapsedGameTime.TotalMilliseconds);
}
//Top paddle control
if (touchState.IsKeyDown(Keys.A))
{
PaddleTop.X -= (float)(PaddleTop.Speed * gameTime.ElapsedGameTime.TotalMilliseconds);
_paddleAi = false;
}
if (touchState.IsKeyDown(Keys.D))
{
PaddleTop.X += (float)(PaddleTop.Speed * gameTime.ElapsedGameTime.TotalMilliseconds);
_paddleAi = false;
}
if (_paddleAi)
{
PaddleTop.X = MathHelper.Lerp(PaddleTop.X, PaddleTop.X + PaddleAI.Move(PaddleTop, Ball) * (float)(PaddleTop.Speed * gameTime.ElapsedGameTime.TotalMilliseconds), Ball.GetElement(0).Speed > 1 ? 1 : (Ball.GetElement(0).Speed / 1.2f));
}
//Limit paddle position
PaddleBottom.X =
MathHelper.Clamp(PaddleBottom.X, screenBounds.Left, screenBounds.Right - PaddleBottom.Width);
PaddleTop.X = MathHelper.Clamp(PaddleTop.X, screenBounds.Left, screenBounds.Right - PaddleTop.Width);
foreach (var ball in Ball)
{
//Ball movement
var ballPositionChange =
ball.Direction * (float)(gameTime.ElapsedGameTime.TotalMilliseconds * ball.Speed);
ball.X += ballPositionChange.X;
ball.Y += ballPositionChange.Y;
// Ball hitting side walls
if (CollisionDetector.Overlaps(ball, Walls.GetElement(0)) ||
CollisionDetector.Overlaps(ball, Walls.GetElement(1)))
{
HitSound.Play(0.2f, 0, 0);
ball.Direction.invertX();
if (ball.Speed < GameConstants.DefaultMaxBallSpeed)
{
ball.Speed *= ball.BumpSpeedIncreaseFactor;
}
}
// Ball hitting goals
if (CollisionDetector.Overlaps(ball, Goals.GetElement(0)))
{
Score.Player1++;
if (Ball.Count == 1)
{
ResetBall();
}
else
{
Ball.Remove(ball);
}
}
if (CollisionDetector.Overlaps(ball, Goals.GetElement(1)))
{
Score.Player2++;
if (Ball.Count == 1)
{
ResetBall();
}
else
{
Ball.Remove(ball);
}
}
// Ball hitting paddles
if (CollisionDetector.Overlaps(ball, PaddleTop) || CollisionDetector.Overlaps(ball, PaddleBottom))
{
HitSound.Play(0.2f, 0, 0);
ball.Direction.invertY();
if (ball.Speed < GameConstants.DefaultMaxBallSpeed)
{
ball.Speed *= ball.BumpSpeedIncreaseFactor;
}
if (ball == Ball.GetElement(0))
{
SpawnPickups();
}
}
if (Timer.Equals("0"))
{
foreach (var pickup in Pickups)
{
if (!CollisionDetector.Overlaps(ball, pickup))
{
continue;
}
pickup.Activate(this);
Pickups.Remove(pickup);
}
}
}
//Ball outside of the screen
if (!new Rectangle(-GameConstants.WallDefaultSize, -GameConstants.WallDefaultSize,
screenBounds.Width + GameConstants.WallDefaultSize,
screenBounds.Height + GameConstants.WallDefaultSize)
.Intersects(new Rectangle((int)Ball.GetElement(0).X, (int)Ball.GetElement(0).Y,
Ball.GetElement(0).Width, Ball.GetElement(0).Height)))
{
ResetBall();
}
base.Update(gameTime);
}