moloch/Assets/Scripts/Managers/PhysicsOverlapManager.cs

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

namespace Moloch
{
    public class PhysicsOverlapManager : MonoBehaviour
    {
        public bool m_Gizmos;
        public LayerMask m_LayerMask;
        private Collider[] m_Colliders = new Collider[10];

        void Awake()
        {
            m_Gizmos = true;
        }

        public Collider FindNearestTarget()
        {
            Array.Clear(m_Colliders, 0 , m_Colliders.Length);

            if (CheckForOverlap())
            {
                return SortArrayByDistance();
            }
            else
            {
                Debug.Log($"No target found in area.");
                return null;
            }
        }

        private bool CheckForOverlap()
        {
            if (Physics.OverlapSphereNonAlloc(this.transform.position, 10f, m_Colliders, m_LayerMask) > 0)
            {

                foreach (Collider collider in m_Colliders)
                {
                    if (collider != null)
                    {
                        return true;
                    }
                }
            }

            return false;
        }

        private Collider SortArrayByDistance()
        {
            Collider shortestDistanceTarget = null;
            float shortestDistance = 100f;

            for (int i = 0; i < m_Colliders.Length; i++)
            {
                Collider col = m_Colliders[i];
                if (col != null)
                {
                    if (!CorpseManagerSingleton.Instance.CheckIfTaken(col.gameObject))
                    {
                        float currentDistance = Vector3.Distance(this.transform.position, col.transform.position);

                        if ((currentDistance < shortestDistance) && col.transform.position.y < 5f)
                        {
                            shortestDistance = currentDistance;
                            shortestDistanceTarget = col;
                        }
                    }
                   
                }
            }

            if(shortestDistanceTarget != null) Debug.Log($"{shortestDistanceTarget.name} is the closest target");
            else if(shortestDistanceTarget == null) Debug.Log($"No target found.");

            return shortestDistanceTarget;
        }


        private void OnDrawGizmos()
        {
            Gizmos.color = Color.red;

            if (m_Gizmos)
            {
                Gizmos.DrawWireSphere(transform.position, 10f);
            }
        }
    }
}