/// <summary>
/// Runs one frame of update for the game.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update(GameTime gameTime,
bool otherScreenHasFocus, bool coveredByOtherScreen)
{
float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
if (IsActive)
{
// Move the player
if (player.IsAlive == true)
{
player.Position += player.Velocity * 128.0f * elapsed;
player.FireTimer -= elapsed;
if (player.Position.X <= 0.0f)
{
player.Position = new Vector2(0.0f, player.Position.Y);
}
if (player.Position.X + player.Width >= worldBounds.Right)
{
player.Position = new Vector2(worldBounds.Right - player.Width, player.Position.Y);
}
}
Respawn(elapsed);
UpdateAliens(elapsed);
UpdateBullets(elapsed);
CheckHits();
if (player.IsAlive && player.Velocity.LengthSquared() > 0.0f)
{
particles.CreatePlayerDust(player);
}
particles.Update(elapsed);
}
base.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);
}
