/// <summary>
/// Release object back to the pool
/// </summary>
/// <param name="spawnedObject">Object to be released.</param>
public void Release(PoolableGameObject spawnedObject)
{
Debug.Assert(spawnedObject.SourceGameObjectPool == this, "Attempting to despawn an object to a pool that is not its spawn source");
spawnedObject.OnReleaseToPool();
spawnedObject.gameObject.SetActive(false);
instanceQueue.Add(spawnedObject);
}
/// <summary>
/// Get an instance from the pool.
/// </summary>
/// <param name="parent">Transform where instance will be parented or null if no parent.</param>
/// <returns>Instance of pooled prefab.</returns>
public PoolableGameObject Get(Transform parent = null)
{
PoolableGameObject spawnedObject = null;
if (instanceQueue.Count > 0)
{
spawnedObject = instanceQueue[0];
instanceQueue.RemoveAt(0);
}
else
{
spawnedObject = parent != null?Object.Instantiate(_prefab, parent) : Object.Instantiate(_prefab);
spawnedObject.SourceGameObjectPool = this;
}
//If prefab is active, then also activate the spawned game object
if (Prefab.gameObject.activeSelf)
{
spawnedObject.gameObject.SetActive(true);
}
spawnedObject.OnGetFromPool();
return(spawnedObject);
}
/// <summary>
/// Get Pool for a given prefab
/// If no pool exists for the prefab one will be created
/// </summary>
/// <param name="prefab">Prefab that will be pooled</param>
/// <returns>Pool of instances of the given prefab</returns>
public GameObjectPool GetPool(PoolableGameObject prefab)
{
if (poolDictionary.TryGetValue(prefab, out var pool))
{
return(pool);
}
pool = new GameObjectPool(prefab);
poolDictionary.Add(prefab, pool);
return(pool);
}
/// <summary>
/// Completely remove an instance from the pool. Called by the PooledGameObject OnDestroy.
/// </summary>
/// <param name="instance">Object to be removed from the pool.</param>
internal void RemoveInstance(PoolableGameObject instance)
{
instanceQueue.Remove(instance);
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="prefab">Prefab to be used by this pool.</param>
public GameObjectPool(PoolableGameObject prefab)
{
_prefab = prefab;
}