AppExperiments

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

namespace Leap.Unity.Animation {

  public class PulsatorRunner : MonoBehaviour {

    private static bool s_appClosing = false;

    private static PulsatorRunner s_instance;
    public static PulsatorRunner instance {
      get {
        if (s_instance == null) {
          s_instance = new GameObject("__Pulsator Runner__").AddComponent<PulsatorRunner>();
        }
        return s_instance;
      }
    }

    public static void NotifyEnabled(Pulsator pulsator) {
      if (s_appClosing || !Application.isPlaying) return;

      instance.notifyEnabled(pulsator);
    }

    public static void NotifyDisabled(Pulsator pulsator) {
      if (s_appClosing || !Application.isPlaying) return;

      instance.notifyDisabled(pulsator);
    }

    private HashSet<Pulsator> _pulsators = new HashSet<Pulsator>();

    void Update() {
      foreach (var pulsator in _pulsators) {
        pulsator.UpdatePulsator(Time.deltaTime);
      }
    }

    void OnDestroy() {
      s_appClosing = true;
    }

    private void notifyEnabled(Pulsator pulsator) {
      _pulsators.Add(pulsator);
    }

    private void notifyDisabled(Pulsator pulsator) {
      _pulsators.Remove(pulsator);
    }

  }

}