public bool Update(Starfield stars, Player player, AlienManager aliens, UFOManager ufo, GraphicsDevice gDev)
{
bool gameover = false;
stars.Update(gDev);
gameover = !aliens.Update(gDev, player.Y);
ufo.Update(gDev, player);
player.UpdateBullets();
return(!gameover);
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
bEvents.Update(GamePad.GetState(PlayerIndex.One), Keyboard.GetState());
switch (phase)
{
case gamePhase.DEVINTRO:
phase = scrIntro.HandleInput(bEvents, phase);
if (scrIntro.IsDone())
{
phase = gamePhase.SPLASH;
}
break;
case gamePhase.SPLASH:
//Move objects
scrSplash.SplashDance(GraphicsDevice, ufo);
//Check for input
phase = scrSplash.HandleInput(bEvents, phase, ufo, player);
break;
case gamePhase.HIGHSCORES:
break;
case gamePhase.LOADLEVEL:
//Initialize for play state
scrLoader.Initialize(player, aliens, ufo);
//Move objects
scrLoader.Update(stars, player, aliens, ufo, GraphicsDevice);
//Check timer
if (scrLoader.IsDone())
{
phase = gamePhase.PLAY;
}
break;
case gamePhase.PLAY:
//Move non-player objects
if (!scrPlay.Update(stars, player, aliens, ufo, GraphicsDevice))
{
phase = gamePhase.GAMEOVER; //aliens have reached the bottom
}
//Random appearances
ufo.Spawn(GraphicsDevice, player.level);
aliens.Fire(player.level);
//Check for input
phase = scrPlay.HandleInput(bEvents, phase, player, GraphicsDevice);
//Check for collisions
scrPlay.DetectCollisions(player, aliens, ufo);
//Change of state?
if (player.lives == 0)
{
phase = gamePhase.GAMEOVER;
}
else if (aliens.count() == 0)
{
player.level++;
phase = gamePhase.LOADLEVEL;
}
break;
case gamePhase.PAUSE:
phase = scrPause.HandleInput(bEvents, phase);
break;
case gamePhase.GAMEOVER:
//Move objects
stars.Update(GraphicsDevice);
//Check for input
phase = scrGameover.HandleInput(bEvents, phase);
break;
case gamePhase.QUIT:
default:
this.Exit();
break;
}
base.Update(gameTime);
}
