Modified non-regression test for interface reconstruction.

This version of the test better corresponds to the intent of
material interface reconstruction, in that a material mask is
now explicitly specified. Non-regression image updated accordingly.

Filters/HyperTree/Testing/Cxx/TestHyperTreeGridBinary2DInterfaceMaterial.cxx

@@ -43,6 +43,9 @@ int TestHyperTreeGridBinary2DInterfaceMaterial( int argc, char* argv[] )
   htGrid->SetGridScale( 1.5, 1., 10. );  // this is to test that orientation fixes scale
   htGrid->SetBranchFactor( 2 );
   htGrid->SetDescriptor( "RRRRR.|.... .R.. RRRR R... R...|.R.. ...R ..RR .R.. R... .... ....|.... ...R ..R. .... .R.. R...|.... .... .R.. ....|...." );
+  htGrid->UseMaterialMaskOn();
+  htGrid->SetDescriptor( "RRRRR.|.... .R.. RRRR R... R...|.R.. ...R ..RR .R.. R... .... ....|.... ...R ..R. .... .R.. R...|.... .... .R.. ....|...." );
+  htGrid->SetMaterialMask( "111111|0000 1111 1111 1111 1111|1111 0001 0111 0101 1011 1111 0111|1111 0111 1111 1111 1111 1111|1111 1111 1111 1111|1111" );
   htGrid->GenerateInterfaceFieldsOn();
   htGrid->Update();
   vtkHyperTreeGrid* H = vtkHyperTreeGrid::SafeDownCast( htGrid->GetOutput() );

Filters/HyperTree/Testing/Cxx/TestHyperTreeGridBinary2DMaterial.cxx

@@ -38,10 +38,10 @@ int TestHyperTreeGridBinary2DMaterial( int argc, char* argv[] )
   vtkNew<vtkHyperTreeGridSource> htGrid;
   int maxLevel = 6;
   htGrid->SetMaximumLevel( maxLevel );
-  htGrid->SetGridSize( 2, 3, 1 );
-  htGrid->SetGridScale( 1.5, 1., 10. );  // this is to test that orientation fixes scale
   htGrid->SetDimension( 2 );
   htGrid->SetOrientation( 2 ); // in xy plane
+  htGrid->SetGridSize( 2, 3, 1 );
+  htGrid->SetGridScale( 1.5, 1., 10. );  // this is to test that orientation fixes scale
   htGrid->SetBranchFactor( 2 );
   htGrid->UseMaterialMaskOn();
   htGrid->SetDescriptor( "RRRRR.|.... .R.. RRRR R... R...|.R.. ...R ..RR .R.. R... .... ....|.... ...R ..R. .... .R.. R...|.... .... .R.. ....|...." );

Filters/HyperTree/Testing/Data/Baseline/TestHyperTreeGridBinary2DInterfaceMaterial.png.md5

-a7a671ee06c4c1b76eb2e355af954f0d
+6f0700f8e834ea3d65dc4ff10a385ca9