/// <summary>Creates a 800x600 window with the specified title.</summary>
public Game()
: base(WindowWidth, WindowHeight, GraphicsMode.Default, "Funny PongGL")
{
//Increase speed as time goes by
_timer.Elapsed += (sender, args) =>
{
_dx += 0.002f * Math.Sign(_dx);
};
VSync = VSyncMode.On;
_ballCenterX = (float)_randomClass.NextDouble();
_ballCenterY = (float)_randomClass.NextDouble();
_dx = BallSpeedX;
_dy = BallSpeedY;
_sprites = new Sprite[2];
_sprites[PlayerOne] = new Sprite(2);
_sprites[PlayerTwo] = new Sprite(2);
_sprites[PlayerOne].Vertices[Bottom].X = -0.025f + 0.8f;
_sprites[PlayerOne].Vertices[Bottom].Y = -0.15f;
_sprites[PlayerOne].Vertices[Top].X = 0.025f + 0.8f;
_sprites[PlayerOne].Vertices[Top].Y = 0.15f;
_sprites[PlayerTwo].Vertices[Bottom].X = -0.025f - 0.8f;
_sprites[PlayerTwo].Vertices[Bottom].Y = -0.15f;
_sprites[PlayerTwo].Vertices[Top].X = 0.025f - 0.8f;
_sprites[PlayerTwo].Vertices[Top].Y = 0.15f;
_timer.Start();
}
private void SetBallSpeed(Sprite player)
{
var currentVelocity = Math.Sqrt(_dx * _dx + _dy * _dy);
var localHitLoc = _ballCenterY - player.Vertices[Bottom].Y + 0.15f;
// Where did the ball hit, relative to the paddle's center?
var angleMultiplier = Math.Abs(localHitLoc / 0.15f);
// Express local hit loc as a percentage of half the paddle's height
// Use the angle multiplier to determine the angle the ball should return at, from 0-65 degrees. Then use trig functions to determine new x/y velocities. Feel free to use a different angle limit if you think another one works better.
var xVelocity = Math.Cos(85.0f * angleMultiplier * Math.PI / 180) * currentVelocity;
var yVelocity = Math.Sin(85.0f * angleMultiplier * Math.PI / 180) * currentVelocity;
// If the ball hit the paddle below the center, the yVelocity should be flipped so that the ball is returned at a downward angle
if (localHitLoc < 0)
{
yVelocity = -yVelocity;
}
// If the ball came in at an xVelocity of more than 0, we know the ball was travelling right when it hit the paddle. It should now start going left.
if (_dx < 0)
{
xVelocity = -xVelocity;
}
_dx = (float)xVelocity;
_dy = (float)yVelocity;
}
