Darklings-FightingGame/Assets/_Project/Scripts/CollisionBoxScripts/Hitbox.cs

using Demonics.Enum;
using Demonics.Utility;
using System;
using UnityEngine;

public class Hitbox : MonoBehaviour
{
	public Vector2 _hitboxSize = default;
	public Vector2 _offset = default;
	public Action OnCollision;
	[SerializeField] private bool _hitGround;
	private Color _hitboxColor = Color.red;
	private UnityEngine.LayerMask _hurtboxLayerMask;
	private IHitboxResponder _hitboxResponder;
	private Transform _sourceTransform;
	[HideInInspector] public bool _hasHit;

	void Awake()
	{
		_sourceTransform = transform.root;
	}

	void Start()
	{
		if (_hitboxResponder == null)
		{
			_hitboxResponder = transform.root.GetComponent<IHitboxResponder>();
		}
		_hurtboxLayerMask += LayerProvider.GetLayerMask(LayerMaskEnum.Hurtbox);
		if (_hitGround)
		{
			_hurtboxLayerMask += LayerProvider.GetLayerMask(LayerMaskEnum.Ground);
		}
	}

	public void SetSourceTransform(Transform sourceTransform)
	{
		_sourceTransform = sourceTransform;
	}

	public void SetHitboxResponder(Transform hitboxResponder)
	{
		_hitboxResponder = hitboxResponder.GetComponent<IHitboxResponder>();
	}

	void Update()
	{
		Vector2 hitboxPosition = new Vector2(transform.position.x + (_offset.x * transform.root.localScale.x), transform.position.y + (_offset.y * transform.root.localScale.y));
		RaycastHit2D[] hit = Physics2D.BoxCastAll(hitboxPosition, _hitboxSize, 0.0f, Vector2.zero, 0.0f, _hurtboxLayerMask);
		if (hit.Length > 0)
		{
			for (int i = 0; i < hit.Length; i++)
			{
				if (hit[i].collider != null)
				{
					if (_hitboxResponder != null && !hit[i].collider.transform.IsChildOf(_sourceTransform) && !_hasHit)
					{
						if (_hitGround && hit[i].normal == Vector2.up)
						{
							OnCollision?.Invoke();
							_hitboxResponder.HitboxCollidedGround(hit[i]);
						}
						if (hit[i].collider.transform.TryGetComponent(out Hurtbox hurtbox))
						{
							OnCollision?.Invoke();
							_hitboxResponder.HitboxCollided(hit[i], hurtbox);
						}
						_hasHit = true;
					}
				}
			}
		}
	}

	void OnEnable()
	{
		_hasHit = false;
	}

	void OnDisable()
	{
		_hasHit = false;
	}

#if UNITY_EDITOR
	private void OnDrawGizmos()
	{
		_hitboxColor.a = 0.6f;
		Vector2 hitboxPosition = new Vector2(transform.position.x + (_offset.x * transform.root.localScale.x), transform.position.y + (_offset.y * transform.root.localScale.y));
		Gizmos.color = _hitboxColor;
		Gizmos.matrix = Matrix4x4.TRS(hitboxPosition, transform.rotation, Vector2.one);

		Gizmos.DrawWireCube(Vector3.zero, new Vector3(_hitboxSize.x, _hitboxSize.y, 1.0f));
		Gizmos.DrawWireCube(Vector3.zero, new Vector3(_hitboxSize.x * 1.01f, _hitboxSize.y * 1.01f, 1.0f));
	}
#endif
}