パーティクルのプーリング用クラス

ParticlePooler.cs

using UnityEngine;
using System.Collections.Generic;
using System.Linq;

/// <summary>
///  パーティクルのプーリング用クラス
/// </summary>
public class ParticlePooler{
	public ParticlePooler(string particleName){
		this.particleName = particleName;
	}

	/// <summary>
	/// パーティクル名
	/// </summary>
	private string particleName;
	public string ParticleName{
		get {return particleName;}
	}

	/// <summary>
	/// パーティクルを保持しておくリスト
	/// </summary>
	private List<ParticleSystem> particleList = new List<ParticleSystem>();
	public List<ParticleSystem> ParticleList{
		get { return particleList;}
	}

	/// <summary>
	/// 生成元のパーティクル
	/// </summary>
	private GameObject particleOrigin = null;

	/// <summary>
	/// 指定の座標で再生
	/// </summary>
	/// <param name="position">Position.</param>
	public void Play(Vector3 position){
		ParticleSystem particle = GetPlayableParticle();
		if(particle == null){
			particle = InstantiateParticle();
		}
		particle.transform.position = position;
		particle.Play();
	}

	/// <summary>
	/// 再生可能なパーティクルを取得
	/// </summary>
	/// <returns>再生可能なパーティクル.</returns>
	private ParticleSystem GetPlayableParticle(){
		return particleList.Where(particle => !particle.isPlaying).FirstOrDefault();
	}

	/// <summary>
	/// パーティクル生成
	/// </summary>
	/// <returns>The particle.</returns>
	private ParticleSystem InstantiateParticle(){
		LoadOrigin();
		GameObject particleGO = GameObject.Instantiate(particleOrigin) as GameObject;
		ParticleSystem particle = particleGO.GetComponent<ParticleSystem>();
		particleList.Add(particle);
		return particle;
	}

	/// <summary>
	/// 生成元のオブジェクトをロード
	/// </summary>
	private void LoadOrigin(){
		if(particleOrigin == null){
			particleOrigin = Resources.Load(particleName) as GameObject;
			particleOrigin.name = particleName;
		}
	}

	/// <summary>
	/// 破棄時処理
	/// </summary>
	private void Clean(){
		particleList.Clear();
		particleList = null;
		particleOrigin = null;
	}
}