Added event when scan is done to SpatialUnderstanding

Author: Sacristan

Assets/HoloToolkit/SpatialUnderstanding/Scripts/SpatialUnderstanding.cs

@@ -36,6 +36,9 @@ public enum ScanStates
         [Tooltip("Update period used after the scanning process is completed")]
         public float UpdatePeriod_AfterScanning = 4.0f;
 
+        public event OnScanDoneDelegate OnScanDone;
+        public delegate void OnScanDoneDelegate();
+
         // Properties
         /// <summary>
         /// Switch used by the entire SpatialUnderstanding module to activate processing.
@@ -256,6 +259,7 @@ private void Update_Scan(float deltaTime)
 
                 // Mark it
                 ScanState = ScanStates.Done;
+                OnScanDone.Invoke();
             }
         }
     }