public void Update(GameCore game, World world, GameTime gameTime)
{
var delta = (float)gameTime.ElapsedGameTime.TotalSeconds;
if (world.GameOver == true)
{
if (Keyboard.GetState().IsKeyDown(Keys.Enter))
{
game.ChangeState(GameCore.STATE_GAMEOVER);
}
}
else
{
Input(game, world, delta);
UpdateShip(world.Ship, delta);
UpdateLasers(world.Lasers, delta);
UpdateAsteroids(world.Asteroids, delta);
ProcessCollisions(world);
UpdateExplosions(world.Explosions, delta);
if (AreAllAsteroidsDestroyed(world.Asteroids))
{
world.TransitionToNewLevel = true;
}
}
}
private void Input(GameCore game, World world, float delta)
{
//Return to menu?
if (Keyboard.GetState().IsKeyDown(Keys.Escape))
{
game.ChangeState(GameCore.STATE_GAMEOVER);
}
//countdown fire timer if _canFire is false
if (!_canFire)
{
_fireTimer += delta;
if (_fireTimer >= _fireDownTime)
{
_canFire = true;
_fireTimer = 0;
}
}
float circle = MathHelper.Pi * 2;
//Thrust
if (Keyboard.GetState().IsKeyDown(Keys.W))
{
var xVelocity = (float)(Math.Cos(world.Ship.Rotation) * world.Ship.Speed);
var yVelocity = (float)(Math.Sin(world.Ship.Rotation) * world.Ship.Speed);
world.Ship.Velocity = new Vector2(xVelocity, yVelocity);
}
//Brake
if (Keyboard.GetState().IsKeyDown(Keys.Q))
{
world.Ship.Velocity = Vector2.Zero;
}
//Rotate to the left
if (Keyboard.GetState().IsKeyDown(Keys.A))
{
world.Ship.Rotation -= world.Ship.TurnSpeed * delta;
world.Ship.Rotation = world.Ship.Rotation % circle;
}
//Rotate to the right
if (Keyboard.GetState().IsKeyDown(Keys.D))
{
world.Ship.Rotation += world.Ship.TurnSpeed * delta;
world.Ship.Rotation = world.Ship.Rotation % circle;
}
//Fire
if (Keyboard.GetState().IsKeyDown(Keys.Space) && _canFire)
{
var xVelocity = (float)(Math.Cos(world.Ship.Rotation) * _laserSpeed);
var yVelocity = (float)(Math.Sin(world.Ship.Rotation) * _laserSpeed);
var laser = new Laser(world.LaserTex, world.LaserSnd, world.Ship.Position, world.Ship.Rotation, new Vector2(xVelocity, yVelocity));
world.Lasers.Add(laser);
_canFire = false;
}
}
