public static List <GameObjectBase> SelectionSortList(List <GameObjectBase> listToSort)
{
int min_index = 0;
for (int i = 0; i < listToSort.Count - 1; i++)
{
min_index = i;
for (int j = i + 1; j < listToSort.Count; j++)
{
if (listToSort[j].Depth < listToSort[min_index].Depth)
{
min_index = j;
}
}
GameObjectBase a = listToSort[i];
GameObjectBase b = listToSort[min_index];
listToSort[i] = b;
listToSort[min_index] = a;
}
return(listToSort);
}
private static void Swap(ref GameObjectBase a, ref GameObjectBase b)
{
GameObjectBase temp = a;
a = b;
b = temp;
}
public void OnCollisionWithEntity(GameObjectBase entity)
{
MouseState state = Mouse.GetState();
if (entity != null && state.LeftButton == ButtonState.Pressed)
{
EnemyGameObject enemy = entity as EnemyGameObject;
if (enemy != null)
{
if (enemy.IsAlive)
{
player.CanAttack = true;
player.target = enemy;
}
return;
}
PotionGameObject potion = entity as PotionGameObject;
if (potion != null)
{
player.target = potion;
player.retrieveItem = true;
return;
}
//SelectEnemy?.Invoke((object)enemy, new CollisionEventArgs(enemy.Position));
}
}
public EnemyGameObject(Vector2 position, GameObjectBase player, int health, int maxHealth)
{
this.health = health;
this.maxHealth = maxHealth;
Position = position;
this.target = player;
}
public override void Update(GameTime gameTime)
{
this.gameTime = gameTime;
isDying = (health <= 0);
//if there is a selected target, make sure the target is alive before attacking.
if (target != null)
{
targetPosition = target.Position;
//if the target is an enemy and is no longer alive, set it to null, switch off canAttack, and set velocity to 0 to stop moving.
if (target != null)
{
EnemyGameObject enemy = target as EnemyGameObject;
if (enemy != null)
{
if (!enemy.IsAlive)
{
canAttack = false;
target = null;
Velocity = Vector2.Zero;
}
}
}
}
if (!isDying)
{
if (state == PlayerState.Attack)
{
sprite.PlayAnimation(attackAnimation);
}
else if (state == PlayerState.Walk || state == PlayerState.Chase)
{
sprite.PlayAnimation(walkAnimation);
}
if (Vector2.Distance(lastMouseLocation, Position) < stoppingDistance)
{
velocity = Vector2.Zero;
}
else
{
Position += Velocity;
}
BoundingBox = BoundingRectangle;
}
else
{
sprite.PlayAnimation(death);
}
fsm.Update(gameTime);
}
public void MoveTowardEntity(GameObjectBase obj, GameTime gameTime)
{
if (obj != null)
{
float elapsedTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
Vector2 directionToChase = obj.Position - Position;
directionToChase.Normalize();
Velocity = directionToChase * speed * elapsedTime;
}
}
//Setting this to the base object allows an enemy to be set to chase an NPC, for example.
public void MoveToward(GameObjectBase obj, GameTime gameTime)
{
if (sprite.Animation != idleAnimation)
{
sprite.PlayAnimation(idleAnimation);
}
float elapsedTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
Vector2 directionToChase = obj.Position - Position;
directionToChase.Normalize();
Velocity = directionToChase * speed * elapsedTime;
direction = directionToChase;
}