Trigger/Runtime/Box2DColliderTrigger.cs

using System;
using System.Collections.Generic;
using Syntriax.Modules.ToggleState;
using UnityEngine;

namespace Syntriax.Modules.Trigger
{
    public class Box2DColliderTrigger : Trigger, IColliderTrigger
    {
        [SerializeField] private LayerMask colliderMask = 0;

        public LayerMask ColliderMask { get => colliderMask; set => colliderMask = value; }
        public Action<List<Collider2D>> OnTriggeredCollidersUpdated { get; set; } = null;

        private Collider2D[] nonAllocResults = new Collider2D[32];
        public List<Collider2D> results = new List<Collider2D>(32);

        private int previousTriggerCount = 0;

        protected void FixedUpdate()
        {
            if (!ToggleStateMember.IsToggledNullChecked())
                return;

            int triggerCount = Physics2D.OverlapBoxNonAlloc(transform.position, transform.localScale, 0, nonAllocResults, ColliderMask);

            if (triggerCount == previousTriggerCount)
                return;
            previousTriggerCount = triggerCount;

            results.Clear();
            for (int i = 0; i < triggerCount; i++)
                results.Add(nonAllocResults[i]);

            IsTrigerred = triggerCount > 0;
            OnTriggeredCollidersUpdated?.Invoke(results);
        }

#if UNITY_EDITOR
        private void OnDrawGizmosSelected()
        {
            Gizmos.color = IsTrigerred ? Color.green : Color.red;
            Gizmos.DrawWireCube(transform.position, transform.lossyScale);
        }
#endif
    }
}