private PoolObjectComponent ReturnToPool(PoolObjectComponent component)
{
var next = firstAvailable;
firstAvailable = component;
return(next);
}
public static PoolObjectComponent AddComponentTo(GameObject target, PoolObjectComponent next,
Func <PoolObjectComponent, PoolObjectComponent> returnCallback)
{
var component = target.AddComponent <PoolObjectComponent>();
component.next = next;
component.returnToPool = returnCallback;
return(component);
}
public void Clear()
{
firstAvailable = null;
foreach (var poolObject in objects)
{
UnityEngine.Object.Destroy(poolObject.gameObject);
}
objects.Clear();
}
private void OnDisable()
{
// when object become a not active in hierarchy
// make it free for use in the pool
if (returnToPool == null)
{
return;
}
next = returnToPool(this);
}
private GameObject InstantiateAndAddToPool()
{
var go = UnityEngine.Object.Instantiate(prefab);
if (container != null)
{
go.transform.SetParent(container);
}
var poolObject = PoolObjectComponent.AddComponentTo(go, firstAvailable, ReturnToPool);
go.SetActive(false);
objects.Add(poolObject);
return(go);
}
/// <summary>
/// Get first available or create new object
/// </summary>
/// <returns>GameObject instance</returns>
public GameObject Create()
{
// if no one object in the PoolObjectComponent linked list or reach the end of the list
// instantiate and add that new instance to linked list
if (firstAvailable.next == null)
{
InstantiateAndAddToPool();
}
// return current first available object from list
// and set next object as first available
var obj = firstAvailable;
firstAvailable = obj.next;
return(obj.gameObject);
}