/// <summary>
/// Updates the state of the enemy
/// </summary>
/// <param name="gameTime">Game time</param>
public override void Update(GameTime gameTime)
{
base.Update(gameTime);
float elapsedSeconds = gameTime.ElapsedGameTime.Milliseconds / 1000.0f; // Elapsed seconds, since the value passed only deals in whole numbers
// If we don't have a reference already, try to find the player
if (null == _player)
{
_player = (Player)Root.FindInGraph("Player");
}
float sightThreshold = 100.0f; // Distance at which the enemy can see the player
float soundThreshold = 200.0f; // Distance at which the enemy can hear the player
float distanceToPlayer = (_player.Position - this.Position).Length();
// Update the state of the enemy
switch (_state)
{
case EnemyState.Idle:
if (CanSeePlayer(distanceToPlayer, sightThreshold))
{
State = EnemyState.Pursuing;
}
else if (CanHearPlayer(distanceToPlayer, soundThreshold))
{
State = EnemyState.Seeking;
}
break;
case EnemyState.Seeking:
if (CanSeePlayer(distanceToPlayer, sightThreshold))
{
State = EnemyState.Pursuing;
}
else if (!CanHearPlayer(distanceToPlayer, soundThreshold))
{
State = EnemyState.Idle;
}
break;
case EnemyState.Pursuing:
if (!CanSeePlayer(distanceToPlayer, sightThreshold))
{
if (CanHearPlayer(distanceToPlayer, soundThreshold))
{
State = EnemyState.Seeking;
}
else
{
State = EnemyState.Idle;
}
}
break;
default:
break;
}
// Update the enemy
_updateFunction(gameTime, elapsedSeconds);
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
// Load the font
_renderer.Font = Content.Load<SpriteFont>("Courier New");
// Load the background
_background = new Background(new Sprite(Content.Load<Texture2D>("background-1")));
// Create the scenegraph
_scene = new SceneNode(null, "_root_");
// Load the player
// Load the player animations
int fps = 6;
Dictionary<String, FrameSet> playerAnimations = new Dictionary<string, FrameSet>();
List<Tuple<int, int>> idleFrames = new List<Tuple<int, int>>();
idleFrames.Add(new Tuple<int, int>(0, 0));
idleFrames.Add(new Tuple<int, int>(0, 1));
playerAnimations.Add("idle", new FrameSet(idleFrames, true, fps));
List<Tuple<int, int>> walkFrames = new List<Tuple<int, int>>();
walkFrames.Add(new Tuple<int, int>(0, 0));
playerAnimations.Add("walk", new FrameSet(walkFrames, true, fps));
List<Tuple<int, int>> crouchFrames = new List<Tuple<int, int>>();
crouchFrames.Add(new Tuple<int, int>(0, 1));
playerAnimations.Add("crouch", new FrameSet(crouchFrames, true, fps));
List<Tuple<int, int>> jumpFrames = new List<Tuple<int, int>>();
jumpFrames.Add(new Tuple<int, int>(0, 2));
playerAnimations.Add("jump", new FrameSet(jumpFrames, true, fps));
List<Tuple<int, int>> interactionFrames = new List<Tuple<int, int>>();
interactionFrames.Add(new Tuple<int, int>(0, 2));
playerAnimations.Add("interact", new FrameSet(interactionFrames, true, fps));
AnimatedSprite playerSprite = new AnimatedSprite(Content.Load<Texture2D>("player-ss"), 32, 64, playerAnimations);
// Load the player sounds
Dictionary<String, SoundEffect> playerSoundFX = new Dictionary<string, SoundEffect>();
playerSoundFX.Add("jump", Content.Load<SoundEffect>("jump"));
playerSoundFX.Add("run", Content.Load<SoundEffect>("run"));
playerSoundFX.Add("walk", Content.Load<SoundEffect>("walk"));
_player = new Player(_scene, "Player", playerSprite, 100.0f, playerSoundFX);
// Load the enemy
Sprite enemySprite = new Sprite(Content.Load<Texture2D>("enemy"));
_enemy = new Enemy(_scene, "Enemy-1", enemySprite, 20.0f);
_enemy.Position = new Vector2(300.0f, 20.0f);
// Load the crate
WorldObject crate = new WorldObject(_scene, "Crate-1", new Sprite(Content.Load<Texture2D>("crate")));
crate.Position = new Vector2(200.0f, 200.0f);
crate.IsElevated = true;
WorldObject crate2 = new WorldObject(_scene, "Crate-2", new Sprite(Content.Load<Texture2D>("crate")));
crate2.Position = new Vector2(400.0f, 400.0f);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="player">The player owning the state</param>
public PlayerState(Player player)
{
_player = player;
}
