ENH: refineHexMesh: add option to keep to 2:1 ratio outside cellSet

applications/utilities/mesh/advanced/refineHexMesh/refineHexMesh.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2013 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2014 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -55,6 +55,12 @@ int main(int argc, char *argv[])
 {
 #   include "addOverwriteOption.H"
     argList::validArgs.append("cellSet");
+    argList::addBoolOption
+    (
+        "minSet",
+        "remove cells from input cellSet to keep to 2:1 ratio"
+        " (default is to extend set)"
+    );
 
 #   include "setRootCase.H"
 #   include "createTime.H"
@@ -65,6 +71,8 @@ int main(int argc, char *argv[])
     word cellSetName(args.args()[1]);
     const bool overwrite = args.optionFound("overwrite");
 
+    const bool minSet = args.optionFound("minSet");
+
     Info<< "Reading cells to refine from cellSet " << cellSetName
         << nl << endl;
 
@@ -143,7 +151,7 @@ int main(int argc, char *argv[])
         meshCutter.consistentRefinement
         (
             cellsToRefine.toc(),
-            true                  // extend set
+            !minSet                 // extend set
         )
     );