feat: polish VR gameplay and sync tools

Assets/VRBeatsKit/Scripts/Core/VR_Saber.cs

@@ -15,10 +15,14 @@ namespace VRBeats
         private VR_Grabbable grabbable = null;
         private ColorSide colorSide = ColorSide.Left;
         private MeshRenderer[] renderArray = null;
+        private SaberTrailEffect trailEffect = null;
 
         private void Awake()
         {
             renderArray = transform.GetComponentsInChildren<MeshRenderer>();
+            trailEffect = GetComponent<SaberTrailEffect>();
+            if (trailEffect == null)
+                trailEffect = gameObject.AddComponent<SaberTrailEffect>();
 
             grabbable = GetComponent<VR_Grabbable>();
             grabbable.OnGrabStateChange.AddListener(OnGrabStateChange);
@@ -44,6 +48,9 @@ namespace VRBeats
             {
                 SetMaterialBindings(materialBindingArray[n], c);
             }
+
+            if (trailEffect != null)
+                trailEffect.SetColor(c);
         }
 
         private void SetMaterialBindings(MaterialBindings matBindings, Color c)
@@ -55,11 +62,15 @@ namespace VRBeats
         public void MakeVisible()
         {
             SetRenderArrayEnableValue(true);
+            if (trailEffect != null)
+                trailEffect.SetVisible(true);
         }
 
         public void MakeInvisible()
         {
             SetRenderArrayEnableValue(false);
+            if (trailEffect != null)
+                trailEffect.SetVisible(false);
         }
 
         private void SetRenderArrayEnableValue(bool value)
@@ -72,4 +83,4 @@ namespace VRBeats
 
     }
 
-}
+}