Unity Component Pool

Description

Pooling system designed to work with Unity components.

Installation

Install with Unity's Package Manager or by copying the repository's contents in your project.

Usage

Using the component pool essentially comes down to replacing Object.Instantiate calls with ComponentPool.Get. Component instances (created with ComponentPool.Get) are pooled by deactivating their corresponding game objects, allowing them to be reused on subsequent ComponentPool.Get calls.

Example

[SerializeField]
MyComponent sourceComponent;

MyComponent _instance;

void Awake()
{
   // Retrieve pooled instance. A new instance will be created if the source component's pool is empty.
   _instance = ComponentPool.Get(sourceComponent);
}

void Start()
{
   _instance.DoSomething();

   // Pool component instance by deactivating its game object.
   _instance.gameObject.SetActive(false);
}

Initializing instances

Component instances can be initialized with the ComponentPoolInitializer component. It's important to specify the component type that you want to pool, since pools are created per source component (and not per game object).

You can change the component that will be pooled by clicking the gear button.

Different types of components can be initialized within the same ComponentPoolInitializer component.

API

ComponentPool.Get

Get an instance of the source. A new instance will be created if the pool is empty.

[SerializeField]
MyComponent source;

void Awake()
{
   MyComponent instance = ComponentPool.Get(source, transform.position, transform.rotation);
}

ComponentPool.GetMany

Gets many instances in a single call.

List: Adds the specified amount of instances to the list.

[SerializeField]
MyComponent source;

private List<MyComponent> _instances = new List<MyComponent>();

void Awake()
{
   ComponentPool.GetMany(_instances, source, 10, transform.position, transform.rotation);
}

Array: Replaces all elements of the array with instances.

[SerializeField]
MyComponent source;

private MyComponent[] _instances = new MyComponent[10];

void Awake()
{
   ComponentPool.GetMany(_instances, source, transform.position, transform.rotation);
}

ComponentPool.DestroySourceInstances

Destroys all component instances of the specified source and clears the source's pool.

[SerializeField]
MyComponent source;

[SerializeField]
MyComponent otherSource;

void Awake()
{
   MyComponent instance = ComponentPool.Get(source);
   MyComponent otherInstance = ComponentPool.Get(otherSource);

   ComponentPool.DestroySourceInstances<MyComponent>(source);

   Debug.Log(instance == null);        // True
   Debug.Log(otherInstance == null);   // False
}

ComponentPool.DestroyInstances<T>

Destroys all component instances of the specified T type and clears all T pools.

[SerializeField]
MyComponent source;

[SerializeField]
MyComponent otherSource;

void Awake()
{
   MyComponent instance = ComponentPool.Get(source);
   MyComponent otherInstance = ComponentPool.Get(otherSource);

   ComponentPool.DestroyInstances<MyComponent>();

   Debug.Log(instance == null);        // True
   Debug.Log(otherInstance == null);   // True
}

Misc

• CHANGELOG
• LICENSE