LowPolyFPS/Assets/Scripts/HazardZone.cs

using UnityEngine;

[RequireComponent(typeof(Collider))]
public class HazardZone : MonoBehaviour
{
    [Header("Hazard Properties")]
    [SerializeField] private bool instantKill = false;
    [SerializeField] private int damagePerSecond = 20;
    [SerializeField] private float damageTickRate = 0.5f;
    [SerializeField] private bool damageEnemies = true;

    [Header("Effects")]
    [SerializeField] private AudioClip burnOrPainSound;

    private float nextDamageTime;

    private void Awake()
    {
        GetComponent<Collider>().isTrigger = true;
    }

    private void OnTriggerStay(Collider other)
    {
        if (Time.time < nextDamageTime) return;

        if (other.CompareTag("Player"))
        {
            if (PlayerHealthController.Instance != null)
            {
                if (instantKill)
                {
                    PlayerHealthController.Instance.TakeDamage(PlayerHealthController.Instance.MaxHealth);
                }
                else
                {
                    int damageToDeal = Mathf.RoundToInt(damagePerSecond * damageTickRate);
                    PlayerHealthController.Instance.TakeDamage(Mathf.Max(1, damageToDeal));
                }

                PlayPainSound();
            }
            nextDamageTime = Time.time + damageTickRate;
        }
        else if (damageEnemies && other.TryGetComponent<EnemyController>(out var enemy))
        {
            if (instantKill)
            {
                enemy.TakeDamage(9999);
            }
            else
            {
                int damageToDeal = Mathf.RoundToInt(damagePerSecond * damageTickRate);
                enemy.TakeDamage(Mathf.Max(1, damageToDeal));
            }
            nextDamageTime = Time.time + damageTickRate;
        }
    }

    private void PlayPainSound()
    {
        if (burnOrPainSound != null)
        {
            AudioSource.PlayClipAtPoint(burnOrPainSound, transform.position);
        }
    }
}