Unity: VR Head Blocking (Oculus Integration)

VRHeadBlocking.cs:

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

// VR Head Blocking Script (Synaptic Response)
// For use with Unity + Oculus Integration (v23.1)
// Add this script to the CenterEyeAnchor component of the OVRCameraRig
// If your player component has colliders set its label to "Player"
// Initial Implementation: Scott Lupton (02.17.2021)

public class VRHeadBlocking : MonoBehaviour
{     
    public GameObject player;    
    private int layerMask;
    private Collider[] objs = new Collider[10];
    private Vector3 prevHeadPos;
    private float backupCap = .2f;
    
    private void Start()
    {
        layerMask = 1 << 8;
        layerMask = ~layerMask;
        prevHeadPos = transform.position;
    }

    private int DetectHit(Vector3 loc)
    {
            int hits = 0;
            int size = Physics.OverlapSphereNonAlloc(loc, backupCap, objs,
                       layerMask, QueryTriggerInteraction.Ignore);
            for (int i = 0 ; i < size; i++) {
                if (objs[i].tag != "Player") {                    
                    hits++;
                }                
            }
            return hits;
    }
    
    public void Update()
    {        
        if (player != null) {                                   
            
            int hits = DetectHit(transform.position);
            
            // No collision
            if (hits == 0) prevHeadPos = transform.position;                           
                
            // Collision
            else {             
                Vector3 headDiff = transform.position - prevHeadPos;
                Vector3 adjHeadPos = new Vector3(player.transform.position.x-headDiff.x,
                                                 player.transform.position.y,
                                                 player.transform.position.z-headDiff.z);
                player.transform.SetPositionAndRotation(adjHeadPos, player.transform.rotation);
            }
        }
    }
}