/// <summary>
/// Animates each gem and checks to allows the player to collect them.
/// </summary>
private void UpdateGems(GameTime gameTime)
{
for (int i = 0; i < gems.Count; ++i)
{
Gem gem = gems[i];
gem.Update(gameTime);
if (gem.BoundingCircle.Intersects(Player.GetBoundingRectangle(Player.PlayerPositions[0])))
{
gems.RemoveAt(i--);
OnGemCollected(gem, Player);
}
}
}
/// <summary>
/// Animates each enemy and allow them to kill the player.
/// </summary>
private void UpdateEnemies(GameTime gameTime)
{
foreach (Enemy enemy in enemies)
{
enemy.Update(gameTime);
// Touching an enemy instantly kills the player
for (int i = 0; i < Player.PlayerPositions.Count; i++)
{
if (enemy.BoundingRectangle.Intersects(Player.GetBoundingRectangle(Player.PlayerPositions[i])))
{
OnPlayerKilled(i, enemy);
}
}
}
}
/// <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,
DisplayOrientation orientation)
{
if (IsLoading)
{
return;
}
if (!initializedLevelStartTime)
{
totalTimeLevelStarted = gameTime.TotalGameTime;
initializedLevelStartTime = true;
}
// record high score at the end of level
if (Player.PlayerStates[0] == PlayerState.ReachedExit && TimeRemaining == TimeSpan.Zero)
{
Player.ReplayData.HighScore = this.Score;
}
// 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 milliSeconds = (int)Math.Round(gameTime.ElapsedGameTime.TotalMilliseconds * 100.0f);
milliSeconds = Math.Min(milliSeconds, (int)Math.Ceiling(TimeRemaining.TotalMilliseconds));
timeRemaining -= TimeSpan.FromMilliseconds(milliSeconds);
score += (int)Math.Round(milliSeconds * (PointsPerSecond / 1000.0));
}
else
{
timeRemaining -= gameTime.ElapsedGameTime;
Player.Update(gameTime, keyboardState, gamePadState, orientation);
UpdateGems(gameTime);
// Falling off the bottom of the level kills the player.
for (int i = 0; i < Player.PlayerPositions.Count; i++)
{
if (Player.GetBoundingRectangle(Player.PlayerPositions[i]).Top >= Height * Tile.Height)
{
OnPlayerKilled(i, 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.
for (int i = 0; i < Player.PlayerPositions.Count; i++)
{
if (Player.PlayerStates[i] == PlayerState.Alive &&
Player.IsOnGround &&
Player.GetBoundingRectangle(Player.PlayerPositions[i]).Contains(exit))
{
OnExitReached(i);
}
}
}
// Clamp the time remaining at zero.
if (timeRemaining < TimeSpan.Zero)
{
timeRemaining = TimeSpan.Zero;
}
}