// on updates do animations and controls
protected override void Update(double deltaTime)
{
// if user click 'exit' action, exit game
if (Input.Down("exit"))
{
Game.Exit();
}
// skip frames with too much delta
if (deltaTime > 1)
{
return;
}
// get window size
var windowSize = Gfx.WindowSize;
// move ball
_ballPosition.AddSelf(_ballSpeed.Multiply((float)deltaTime * 235f));
if (_ballPosition.X < 0)
{
_ballSpeed.X = Math.Abs(_ballSpeed.X);
}
if (_ballPosition.X > windowSize.X)
{
_ballSpeed.X = -Math.Abs(_ballSpeed.X);
}
if (_ballPosition.Y < 0)
{
_ballSpeed.Y = Math.Abs(_ballSpeed.Y);
}
if (_ballPosition.Y > windowSize.Y + 250)
{
_ballSpeed.Y = -Math.Abs(_ballSpeed.Y);
}
_isBallOut = _ballPosition.Y > windowSize.Y;
// if ball out, reset speed
if (_isBallOut && Math.Abs(_ballSpeed.X) > 1f)
{
_ballSpeed.X = 1;
}
// update explosions
foreach (Explosion exp in _explosions)
{
if (exp.Radius > 10)
{
exp.Color.A -= (float)deltaTime * 1.25f;
}
exp.Radius += (float)deltaTime * 150f;
}
_explosions.RemoveAll(x => x.Color.A < 0);
// player movement speed
var playerSpeed = 350f;
float playerVelocity = 0f;
// do player movement
if (!_isBallOut)
{
// move player left
if (_player.Left > 0 && Input.Down("left"))
{
playerVelocity -= (float)deltaTime * playerSpeed;
}
// move player right
if (_player.Right < windowSize.X && Input.Down("right"))
{
playerVelocity += (float)deltaTime * playerSpeed;
}
}
// update player position
_player.X += playerVelocity;
// test collision with blocks
Block collidedBlock = null;
foreach (var block in _blocks)
{
// check collision with block + some extra margin
var rect = block.Rectangle;
rect.X -= 5;
rect.Width += 10;
rect.Y -= 5;
rect.Height += 10;
// ball hit block
if (rect.Contains(_ballPosition))
{
AddExplosion(_ballPosition, block.Color);
collidedBlock = block;
if ((_ballPosition.Y < block.Rectangle.Top + 6) || (_ballPosition.Y > block.Rectangle.Bottom - 6))
{
_ballSpeed.Y *= -1;
}
if ((_ballPosition.X < block.Rectangle.Left + 5) || (_ballPosition.X > block.Rectangle.Right - 5))
{
_ballSpeed.X *= -1;
}
break;
}
}
if (collidedBlock != null)
{
_blocks.Remove(collidedBlock);
}
// test collision with player paddle
if (_ballSpeed.Y > 0)
{
// create a slightly larger rect for player collision
var playerCollision = _player;
playerCollision.X -= 10;
playerCollision.Width += 10;
playerCollision.Y -= 10;
playerCollision.Height += 15;
// check if hit ball
if (playerCollision.Contains(_ballPosition))
{
// update ball speed
_ballSpeed.Y = -_ballSpeed.Y;
_ballSpeed.X += playerVelocity * 0.1f;
// special case for corners
if (_ballPosition.X < _player.Left + 10)
{
if (_ballSpeed.X > 0)
{
_ballSpeed.X = 0f;
}
_ballSpeed.X -= 0.65f;
AddExplosion(_ballPosition, new Color(1f, 0.5f, 0f, 1f));
}
else if (_ballPosition.X > _player.Right - 10)
{
if (_ballSpeed.X < 0)
{
_ballSpeed.X = 0f;
}
_ballSpeed.X += 0.65f;
AddExplosion(_ballPosition, new Color(1f, 0.5f, 0f, 1f));
}
}
}
}