generated objects are grabbable and scalable

Assets/_PROJECT/Scripts/ModeGeneration/ShapeDetection/ShapeDetectionMinigameController.cs

@@ -67,17 +67,19 @@ public class ShapeDetectionMinigameController : MonoBehaviour
 
     private void InitializeSpawnedObject(GameObject spawnedObject)
     {
-        Rigidbody rigidbody = spawnedObject.AddComponent<Rigidbody>();
+        GameObject spawnedObjectParent = new GameObject("SpawnedModelParent");
+        spawnedObjectParent.transform.parent = modelSpawnPoint;
+        spawnedObjectParent.transform.position = modelSpawnPoint.transform.position;
+        Rigidbody rigidbody = spawnedObjectParent.AddComponent<Rigidbody>();
         rigidbody.isKinematic = true;
 
         //spawnedObject.AddComponent<NetworkObject>();
         //spawnedObject.AddComponent<NetworkTransform>();
-        spawnedObject.transform.parent = modelSpawnPoint;
-        spawnedObject.transform.position = modelSpawnPoint.position;
+
+        spawnedObject.transform.parent = spawnedObjectParent.transform;
+        spawnedObject.transform.position = spawnedObjectParent.transform.position;
         spawnedObject.tag = shapeScannerTag;
 
-        spawnedObject.SetActive(true);
-
-        spawnedObject.AddComponent<XRGrabInteractable>();
+        spawnedObjectParent.AddComponent<TwoHandScaleGrabInteractable>();
     }
 }

Assets/_PROJECT/Scripts/ModeGeneration/ShapeDetection/TwoHandsScaleGrabInteractable.cs

@@ -0,0 +1,88 @@
+
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.XR.Interaction.Toolkit;
+
+public class TwoHandScaleGrabInteractable : XRGrabInteractable
+{
+    [Header("Two-Hand Scaling")]
+    public float minScale = 0.1f;
+    public float maxScale = 5f;
+    public float scaleLerpSpeed = 0f;
+
+    private Transform scalingTransform;
+    private float initialHandsDistance;
+    private Vector3 initialScale;
+    private bool twoHandsGrabbing;
+
+    void Start()
+    {
+        selectMode = InteractableSelectMode.Multiple;
+        useDynamicAttach = true;
+        reinitializeDynamicAttachEverySingleGrab = false;
+
+        scalingTransform = transform.GetChild(0);
+    }
+
+    protected override void OnSelectEntered(SelectEnterEventArgs args)
+    {
+        base.OnSelectEntered(args);
+        UpdateTwoHandState();
+    }
+
+    protected override void OnSelectExited(SelectExitEventArgs args)
+    {
+        Debug.Log("current local scale: " + transform.localScale);
+        base.OnSelectExited(args);
+        UpdateTwoHandState();
+    }
+
+    void UpdateTwoHandState()
+    {
+        if (interactorsSelecting.Count >= 2)
+        {
+            var a = interactorsSelecting[0];
+            var b = interactorsSelecting[1];
+
+            var pA = a.GetAttachTransform(this).position;
+            var pB = b.GetAttachTransform(this).position;
+
+            initialHandsDistance = Vector3.Distance(pA, pB);
+            initialScale = scalingTransform.localScale;
+            twoHandsGrabbing = initialHandsDistance > 0.0001f;
+        }
+        else
+        {
+            twoHandsGrabbing = false;
+        }
+    }
+
+    public override void ProcessInteractable(XRInteractionUpdateOrder.UpdatePhase updatePhase)
+    {
+        base.ProcessInteractable(updatePhase);
+
+        if (!twoHandsGrabbing || interactorsSelecting.Count < 2 || initialHandsDistance <= 0.0001f)
+            return;
+        var a = interactorsSelecting[0];
+        var b = interactorsSelecting[1];
+
+        var pA = a.GetAttachTransform(this).position;
+        var pB = b.GetAttachTransform(this).position;
+
+        float current = Vector3.Distance(pA, pB);
+        if (current <= 0.0001f)
+            return;
+
+        float ratio = current / initialHandsDistance;
+        Debug.Log("distance ratio: " + ratio);
+
+        Vector3 desired = initialScale * ratio;
+        float uniform = Mathf.Clamp(desired.x, minScale, maxScale);
+        desired = new Vector3(uniform, uniform, uniform);
+
+        if (scaleLerpSpeed > 0f)
+            desired = Vector3.Lerp(transform.localScale, desired, Time.deltaTime * scaleLerpSpeed);
+
+        scalingTransform.localScale = desired;
+    }
+}

Assets/_PROJECT/Scripts/ModeGeneration/ShapeDetection/TwoHandsScaleGrabInteractable.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 22c2ea15df0386746b1b1bc7b58bced7
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: