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1 files changed, 96 insertions, 0 deletions

diff --git a/Assets/Samples/XR Interaction Toolkit/3.1.2/Hands Interaction Demo/HandsDemoSceneAssets/Scripts/ObjectResetPlane.cs b/Assets/Samples/XR Interaction Toolkit/3.1.2/Hands Interaction Demo/HandsDemoSceneAssets/Scripts/ObjectResetPlane.cs
new file mode 100644
index 0000000..68f2817
--- /dev/null
+++ b/Assets/Samples/XR Interaction Toolkit/3.1.2/Hands Interaction Demo/HandsDemoSceneAssets/Scripts/ObjectResetPlane.cs
@@ -0,0 +1,96 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace UnityEngine.XR.Interaction.Toolkit.Samples.Hands
+{
+    /// <summary>
+    /// Provides the ability to reset specified objects if they fall below a certain position - designated by this transform's height.
+    /// </summary>
+    public class ObjectResetPlane : MonoBehaviour
+    {
+        [SerializeField]
+        [Tooltip("Which objects to reset if falling out of range.")]
+        List<Transform> m_ObjectsToReset = new List<Transform>();
+
+        [SerializeField]
+        [Tooltip("How often to check if objects should be reset.")]
+        float m_CheckDuration = 2f;
+
+        [SerializeField]
+        [Tooltip("The object root used to compute local positions relative to. Objects will respawn relative to their position in this transform's hierarchy.")]
+        Transform m_ObjectRoot = null;
+
+        readonly List<Pose> m_OriginalPositions = new List<Pose>();
+
+        float m_CheckTimer;
+
+        /// <summary>
+        /// See <see cref="MonoBehaviour"/>.
+        /// </summary>
+        protected void Start()
+        {
+            foreach (var currentTransform in m_ObjectsToReset)
+            {
+                if (currentTransform != null)
+                {
+                    var position = currentTransform.position;
+
+                    if (m_ObjectRoot != null)
+                        position = m_ObjectRoot.InverseTransformPoint(currentTransform.position);
+
+                    m_OriginalPositions.Add(new Pose(position, currentTransform.rotation));
+                }
+                else
+                {
+                    Debug.LogWarning("Objects To Reset contained a null element. Update the reference or delete the array element of the missing object.", this);
+                    m_OriginalPositions.Add(new Pose());
+                }
+            }
+        }
+
+        /// <summary>
+        /// See <see cref="MonoBehaviour"/>.
+        /// </summary>
+        protected void Update()
+        {
+            m_CheckTimer -= Time.deltaTime;
+
+            if (m_CheckTimer > 0)
+                return;
+
+            m_CheckTimer = m_CheckDuration;
+
+            var resetPlane = transform.position.y;
+
+            for (var transformIndex = 0; transformIndex < m_ObjectsToReset.Count; transformIndex++)
+            {
+                var currentTransform = m_ObjectsToReset[transformIndex];
+                if (currentTransform == null)
+                    continue;
+
+                if (currentTransform.position.y < resetPlane)
+                {
+                    var originalWorldPosition = m_OriginalPositions[transformIndex].position;
+                    if (m_ObjectRoot != null)
+                        originalWorldPosition = m_ObjectRoot.TransformPoint(originalWorldPosition);
+
+                    currentTransform.SetPositionAndRotation(originalWorldPosition, m_OriginalPositions[transformIndex].rotation);
+
+                    var rigidBody = currentTransform.GetComponentInChildren<Rigidbody>();
+                    if (rigidBody != null)
+                    {
+                        StartCoroutine(ResetRigidbodyRoutine(rigidBody));
+                    }
+                }
+            }
+        }
+
+        IEnumerator ResetRigidbodyRoutine(Rigidbody body)
+        {
+            body.isKinematic = true;
+            yield return new WaitForFixedUpdate();
+            body.isKinematic = false;
+
+        }
+    }
+}