/// <summary>
/// Updates the Entity.
/// </summary>
/// <param name="graphics">The graphics.</param>
/// <param name="input">The input.</param>
/// <param name="delta">The delta.</param>
public void Update(GraphicsDevice graphics, Input input, long delta)
{
MenuScreen screen = Screens[SelectedMenuScreen];
int max = (Screens[SelectedMenuScreen] == Screens[MainMenuIndex])
? screen.Elements.Count
: screen.Elements.Count + 1;
if (input.Down())
{
if (_down == false)
{
_down = true;
_menuMove.Play();
screen.SelectedIndex += 1;
if (screen.SelectedIndex >= max)
{
screen.SelectedIndex = 0;
}
}
}
else
{
_down = false;
}
if (input.Up())
{
if (_up == false)
{
_up = true;
_menuMove.Play();
screen.SelectedIndex -= 1;
if (screen.SelectedIndex < 0)
{
screen.SelectedIndex = max - 1;
}
}
}
else
{
_up = false;
}
if (input.Fire())
{
if (_enter == false)
{
_enter = true;
Action[] actions = screen.Elements.Values.ToArray();
if (screen.SelectedIndex == actions.Count())
{
_menuBack.Play();
SelectedMenuScreen = screen.Parent == null ? MainMenuIndex : Screens.IndexOf(screen.Parent);
}
else
{
Action action = screen.Elements.Values.ToArray()[screen.SelectedIndex];
if (action != null)
{
_menuSelect.Play();
action();
}
}
}
}
else
{
_enter = false;
}
if (input.Escape())
{
if (_escape == false)
{
_escape = true;
if (screen.Parent != null)
{
_menuBack.Play();
SelectedMenuScreen = Screens.IndexOf(screen.Parent);
}
else if (screen != Screens[MainMenuIndex])
{
_menuBack.Play();
SelectedMenuScreen = MainMenuIndex;
}
}
}
else
{
_escape = false;
}
}
/// <summary>
/// Reference page contains links to related conceptual articles.
/// </summary>
/// <param name="gameTime">Time passed since the last call to Update.</param>
protected override void Update(GameTime gameTime)
{
long delta = gameTime.ElapsedGameTime.Milliseconds;
var inputState = new Input(Keyboard.GetState(), GamePad.GetState(PlayerIndex.One));
if (_running)
{
if (inputState.Escape())
{
_running = false;
_menu.SelectedMenuScreen = _menu.MainMenuIndex;
return;
}
_player.Update(GraphicsDevice, inputState, delta);
_lastFire += delta;
if (inputState.Fire())
{
if (_lastFire > _fireTime.Milliseconds)
{
_lastFire = 0;
_shootSound.Play();
AddProjectile();
}
}
UpdateCollisions();
for (int i = _projectiles.Count - 1; i >= 0; i--)
{
_projectiles[i].Update(GraphicsDevice, inputState, delta);
if (_projectiles[i].Active == false)
{
_projectiles.RemoveAt(i);
}
}
for (int i = _explosions.Count - 1; i >= 0; i--)
{
_explosions[i].Update(GraphicsDevice, inputState, delta);
if (_explosions[i].Active == false)
{
_explosions.RemoveAt(i);
}
}
for (int i = _enemies.Count - 1; i >= 0; i--)
{
_enemies[i].Update(GraphicsDevice, inputState, delta);
if (_enemies[i].Active == false)
{
_enemies.RemoveAt(i);
}
else
{
if (_enemies[i].LastFired > _fireTime.Milliseconds)
{
_enemies[i].LastFired = 0;
double angle;
if (_enemies[i].Accurate)
{
angle = Math.Atan2(_player.Position.Y - _enemies[i].Position.Y,
_player.Position.X - _enemies[i].Position.X);
}
else
{
angle = _rand.NextDouble() * MathHelper.TwoPi;
}
Vector2 position = _enemies[i].Position +
new Vector2((float)(32 * Math.Cos(angle)), (float)(32 * Math.Sin(angle)));
var projectile = new Projectile();
projectile.Initialize(GraphicsDevice.Viewport, _projectileTexture, position, angle,
ProjectileMoveSpeed, true);
_projectiles.Add(projectile);
}
}
}
UpdateAsteroids(delta, inputState);
base.Update(gameTime);
}
else
{
_menu.Update(GraphicsDevice, inputState, delta);
}
}