/// <summary>
/// Updates all objects in the world, performs collision between them,
/// and handles the time limit with scoring.
/// </summary>
public void Update(
GameTime gameTime,
KeyboardState keyboardState,
GamePadState gamePadState,
TouchCollection touchState,
AccelerometerState accelState,
DisplayOrientation orientation)
{
// Pause while the player is dead or time is expired.
if (!Player.IsAlive || TimeRemaining == TimeSpan.Zero)
{
// Still want to perform physics on the player.
Player.ApplyPhysics(gameTime);
}
else if (ReachedExit)
{
// Animate the time being converted into points.
int seconds = (int)Math.Round(gameTime.ElapsedGameTime.TotalSeconds * 100.0f);
seconds = Math.Min(seconds, (int)Math.Ceiling(TimeRemaining.TotalSeconds));
timeRemaining -= TimeSpan.FromSeconds(seconds);
score += seconds * PointsPerSecond;
}
else
{
timeRemaining -= gameTime.ElapsedGameTime;
Player.Update(gameTime, keyboardState, gamePadState, touchState, accelState, orientation);
UpdateGems(gameTime);
// Falling off the bottom of the level kills the player.
if (Player.BoundingRectangle.Top >= Height * Tile.Height)
{
OnPlayerKilled(null);
}
UpdateEnemies(gameTime);
// The player has reached the exit if they are standing on the ground and
// his bounding rectangle contains the center of the exit tile. They can only
// exit when they have collected all of the gems.
if (Player.IsAlive &&
Player.IsOnGround &&
Player.BoundingRectangle.Contains(exit))
{
OnExitReached();
}
}
// Clamp the time remaining at zero.
if (timeRemaining < TimeSpan.Zero)
{
timeRemaining = TimeSpan.Zero;
}
}
