ENH: ensightWrite, vtkWrite support for excluding fields and patches

- functionality similar to that provided by foamToEnsight, foamToVTK
  which allows blocking out patches (eg, outer walls, inlet/outlet)
  that are not particularly interesting to visualize

src/functionObjects/utilities/vtkWrite/vtkWriteUpdate.C

@@ -59,6 +59,8 @@ Foam::labelList Foam::functionObjects::vtkWrite::getSelectedPatches
 {
     DynamicList<label> patchIDs(patches.size());
 
+    wordRes::filter patchFilter(selectPatches_, blockPatches_);
+
     for (const polyPatch& pp : patches)
     {
         if (isType<emptyPolyPatch>(pp))
@@ -70,12 +72,7 @@ Foam::labelList Foam::functionObjects::vtkWrite::getSelectedPatches
             break; // No processor patches
         }
 
-        if
-        (
-            selectPatches_.size()
-          ? selectPatches_.match(pp.name())
-          : true
-        )
+        if (patchFilter(pp.name()))
         {
             patchIDs.append(pp.index());
         }
@@ -180,9 +177,14 @@ bool Foam::functionObjects::vtkWrite::readSelection(const dictionary& dict)
     selectPatches_.clear();
     dict.readIfPresent("patches", selectPatches_);
 
+    blockPatches_.clear();
+    dict.readIfPresent("excludePatches", blockPatches_);
+
     selectFields_.clear();
     dict.readEntry("fields", selectFields_);
-    selectFields_.uniq();
+
+    blockFields_.clear();
+    dict.readIfPresent("excludeFields", blockFields_);
 
     // Actions to define selection
     selection_ = dict.subOrEmptyDict("selection");