Change time in Spatial Mapping to unscaledTime

Unscaled time allows Spatial Mapping to continue while the physics are
paused.

Author: mironec

Assets/HoloToolkit/SpatialMapping/Scripts/SpatialMappingManager.cs

@@ -212,7 +212,7 @@ public void StartObserver()
             if (!IsObserverRunning())
             {
                 surfaceObserver.StartObserving();
-                StartTime = Time.time;
+                StartTime = Time.unscaledTime;
             }
         }
 

Assets/HoloToolkit/SpatialMapping/Scripts/SpatialMappingObserver.cs

@@ -150,10 +150,10 @@ private void Update()
                         ReclaimSurface(newSurface);
                     }
                 }
-                else if ((Time.time - updateTime) >= TimeBetweenUpdates)
+                else if ((Time.unscaledTime - updateTime) >= TimeBetweenUpdates)
                 {
                     observer.Update(SurfaceObserver_OnSurfaceChanged);
-                    updateTime = Time.time;
+                    updateTime = Time.unscaledTime;
                 }
             }
         }

Assets/HoloToolkit/SpatialMapping/Tests/Scripts/SpatialProcessingTest.cs

@@ -48,7 +48,7 @@ private void Update()
             {
                 // Check to see if enough scanning time has passed
                 // since starting the observer.
-                if ((Time.time - SpatialMappingManager.Instance.StartTime) < scanTime)
+                if ((Time.unscaledTime - SpatialMappingManager.Instance.StartTime) < scanTime)
                 {
                     // If we have a limited scanning time, then we should wait until
                     // enough time has passed before processing the mesh.