EnemyHealth.cs

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using PlayerInfo;
using Shell;
using Management;

namespace EnemyInfo
{
    public class EnemyHealth : MonoBehaviour
    {
        public float StartHealth = 100f;
        public Slider Slider;
        public Image FillImage;
        public Color FullHealth = Color.green;
        public Color ZeroHealth = Color.red;
        public GameObject ExplosionPrefab;
        public int PlayerWinRound = 1;

        AudioSource ExplosionAudio;
        ParticleSystem ExplosionParticles;
        [HideInInspector] public float CurrentHealth;
        [HideInInspector] public bool Dead;

        void Awake ()
        {
            ExplosionParticles = Instantiate (ExplosionPrefab).GetComponent<ParticleSystem> ();

            ExplosionAudio = ExplosionParticles.GetComponent<AudioSource> ();

            ExplosionParticles.gameObject.SetActive (false);
        }

        void OnEnable ()
        {
            CurrentHealth = StartHealth;
            Dead = false;

            SetHealthUI ();
        }

        public void TakeDamage (float amount)
        {
            CurrentHealth -= amount;

            SetHealthUI ();

            if (CurrentHealth <= 0f && !Dead)
            {
                OnDeath ();
            }
        }

        void SetHealthUI ()
        {
            Slider.value = CurrentHealth;

            FillImage.color = Color.Lerp (ZeroHealth, FullHealth, CurrentHealth / StartHealth);
        }

        void OnDeath ()
        {
            Dead = true;

            ExplosionParticles.transform.position = transform.position;
            ExplosionParticles.gameObject.SetActive (true);

            ExplosionParticles.Play ();

            ExplosionAudio.Play ();
            gameObject.SetActive (false);

            ScoreManager.PlayerScore += PlayerWinRound;
        }
    }
}