Replace UltimateXR with HurricaneVR

Assets/HurricaneVR/TechDemo/Scripts/DemoBackpack.cs

@@ -0,0 +1,61 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using HurricaneVR.Framework.Core;
+using UnityEngine;
+
+namespace HurricaneVR.TechDemo.Scripts
+{
+    public class DemoBackpack : MonoBehaviour
+    {
+        [Tooltip("Used to ignore collision with grabbable colliders.")]
+        public List<Collider> Colliders = new List<Collider>();
+
+        void Start()
+        {
+            if (Colliders == null || Colliders.Count == 0)
+            {
+                Colliders = GetComponentsInChildren<Collider>().Where(e=>!e.isTrigger).ToList();
+            }
+            if (Colliders.Count > 0)
+                StartCoroutine(IgnoreColliders());
+        }
+
+        public IEnumerator IgnoreColliders()
+        {
+            yield return null;
+
+            //this will only ignore grabbables at the start of the game.
+            //you would need to ignore the collision yourself if you instantiate grabbables after.
+
+            var watch = Stopwatch.StartNew();
+            var grabbables = FindObjectsOfType<HVRGrabbable>();
+
+            foreach (var grabbable in grabbables)
+            {
+                IgnoreCollision(grabbable);
+            }
+            watch.Stop();
+            //Debug.Log($"Backpack colliders ignore took : {watch.ElapsedMilliseconds} ms.");
+        }
+
+        public void IgnoreCollision(HVRGrabbable grabbable)
+        {
+            for (var i = 0; i < grabbable.Colliders.Count; i++)
+            {
+                var c = grabbable.Colliders[i];
+                if (!c)
+                    continue;
+
+                for (var j = 0; j < Colliders.Count; j++)
+                {
+                    var ourCollider = Colliders[j];
+                    if (ourCollider.isTrigger)
+                        continue;
+                    Physics.IgnoreCollision(c, ourCollider);
+                }
+            }
+        }
+    }
+}