/// <summary>
/// This method adds to the score (the value is read from the collectable),
/// removes the collectable from the collectables list,
/// destroys the collectable and
/// updates the score text.
/// </summary>
/// <param name="collectable"></param> The collectable that calls this method.
public void CollectableCollected(Collectable collectable)
{
_score += collectable.Score;
RemoveCollectableFromList(collectable);
Destroy(collectable.gameObject);
UpdateScore();
}
void Update()
{
if (_collectables.Count < _maximumCollectableItems)
{
_collectableSpawnCountdown -= Time.deltaTime;
if (_collectableSpawnCountdown < 0f)
{
_collectableSpawnCountdown = _collectableSpawnRate;
Collectable collectable = Instantiate(_collectablePrefab);
RandomizeCollectablePosition(collectable);
_collectables.Add(collectable);
}
}
}
private IEnumerator Spawn()
{
while (!GameManager.IsClosing)
{
yield return(new WaitForSeconds(_spawnInterval));
// Actually checks if the max number is already active.
if (_store.Count > 0)
{
Collectable c = _store.Pop();
c.transform.position = GetRandomPosition();
c.gameObject.SetActive(true);
}
}
}
// Use this for initialization
void Awake()
{
_store = new Stack <Collectable>();
_instance = this;
// Pregenerate the objects as inactive.
for (int i = 1; i <= maxAtOnce; i++)
{
Collectable c = Instantiate(_prefab);
c.gameObject.SetActive(false);
_store.Push(c);
}
StartCoroutine(Spawn());
}
/// <summary>
/// Spawns a collectable at a random position within the spawn area.
/// </summary>
private void SpawnItem()
{
Collectable item = collItemPool.GetPooledObject(true);
if (item != null)
{
// Gets random x- and z-coordinates
float randX = Random.Range(ItemSpawnAreaCorner1.x, ItemSpawnAreaCorner2.x);
float randZ = Random.Range(ItemSpawnAreaCorner1.z, ItemSpawnAreaCorner2.z);
item.transform.position = new Vector3(randX, 0, randZ);
item.InitDefaults();
item.SetHandler(this);
collectables.Add(item);
}
}
internal void Recycle(Collectable collectable)
{
collectable.gameObject.SetActive(false);
_store.Push(collectable);
}
/// <summary>
/// Returns a collectable to the pool.
/// </summary>
/// <param name="item">A collectable</param>
public void ReturnItemToPool(Collectable item)
{
collItemPool.ReturnObject(item);
}
/// <summary>
/// This method randomizes the location of the parameter collectable to within
/// a rectangle formed between two points in the scene.
/// </summary>
/// <param name="collectable"></param> The collectable that is to be moved.
private void RandomizeCollectablePosition(Collectable collectable)
{
collectable.transform.position = new Vector3(Random.Range(_upperLeftCorner.position.x, _lowerRightCorner.position.x),
_collectablePositionY,
Random.Range(_upperLeftCorner.position.z, _lowerRightCorner.position.z));
}
/// <summary>
/// When a collectable is collected, it calls this method so it can be removed from the collectables list.
/// </summary>
/// <param name="collectable"></param> The collectable that is to be removed.
public void RemoveCollectableFromList(Collectable collectable)
{
_collectables.Remove(collectable);
}