ENH: Call GenerateVisibility & ParentChildInfo

Call GenerateVisibility & ParentChildInfo

Change-Id: Ic1fe431230690119fdbc703a899a4d0e16a8d9f2

Graphics/vtkOverlappingAMRLevelIdScalars.cxx

@@ -22,6 +22,7 @@
 #include "vtkUniformGrid.h"
 #include "vtkUnsignedCharArray.h"
 #include "vtkOverlappingAMR.h"
+#include "vtkAMRUtilities.h"
 
 #include <cassert>
 
@@ -104,6 +105,10 @@ int vtkOverlappingAMRLevelIdScalars::RequestData(
 
   this->AddColorLevels(input, output);
 
+  vtkOverlappingAMR *amr = vtkOverlappingAMR::SafeDownCast(output);
+  assert( "ERROR: cannot down-cast to overlapping AMR" && (amr != NULL) );
+  amr->GenerateParentChildInformation();
+  amr->GenerateVisibilityArrays();
   return 1;
 }