STYLE: add nBoundaryFaces() method to primitiveMesh

- nBoundaryFaces() is often used and is identical to
  (nFaces() - nInternalFaces()).

- forward the mesh nInternalFaces() and nBoundaryFaces() to
  polyBoundaryMesh as nFaces() and start() respectively,
  for use when operating on a polyBoundaryMesh.

STYLE:

- use identity() function with starting offset when creating boundary maps.

     labelList map
     (
         identity(mesh.nBoundaryFaces(), mesh.nInternalFaces())
     );

  vs.

     labelList map(mesh.nBoundaryFaces());
     forAll(map, i)
     {
         map[i] = mesh.nInternalFaces() + i;
     }

applications/utilities/mesh/advanced/modifyMesh/modifyMesh.C

@@ -413,7 +413,7 @@ int main(int argc, char *argv[])
     const SubList<face> outsideFaces
     (
         mesh.faces(),
-        mesh.nFaces() - mesh.nInternalFaces(),
+        mesh.nBoundaryFaces(),
         mesh.nInternalFaces()
     );
 

applications/utilities/mesh/conversion/fluentMeshToFoam/fluentMeshToFoam.L

@@ -1386,7 +1386,7 @@ int main(int argc, char *argv[])
     DynamicList<polyPatch*> newPatches(nPatches);
 
     // For every boundary face the old patch.
-    labelList facePatchID(pShapeMesh.nFaces()-pShapeMesh.nInternalFaces(), -1);
+    labelList facePatchID(pShapeMesh.nBoundaryFaces(), -1);
     label cMeshFace = pShapeMesh.nInternalFaces();
     label nBoundaries = 0;
 

applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/backgroundMeshDecomposition/backgroundMeshDecomposition.C

@@ -468,7 +468,7 @@ void Foam::backgroundMeshDecomposition::printMeshData
 
     // // Print stats
 
-    // globalIndex globalBoundaryFaces(mesh.nFaces()-mesh.nInternalFaces());
+    // globalIndex globalBoundaryFaces(mesh.nBoundaryFaces());
 
     for (label proci = 0; proci < Pstream::nProcs(); proci++)
     {
@@ -671,7 +671,7 @@ void Foam::backgroundMeshDecomposition::buildPatchAndTree()
         SubList<face>
         (
             mesh_.faces(),
-            mesh_.nFaces() - mesh_.nInternalFaces(),
+            mesh_.nBoundaryFaces(),
             mesh_.nInternalFaces()
         ),
         mesh_.points()

applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshZones.C

@@ -39,7 +39,7 @@ void Foam::conformalVoronoiMesh::calcNeighbourCellCentres
     pointField& neiCc
 ) const
 {
-    label nBoundaryFaces = mesh.nFaces() - mesh.nInternalFaces();
+    const label nBoundaryFaces = mesh.nBoundaryFaces();
 
     if (neiCc.size() != nBoundaryFaces)
     {
@@ -319,7 +319,7 @@ void Foam::conformalVoronoiMesh::calcFaceZones
     const labelList& faceOwner = mesh.faceOwner();
     const labelList& faceNeighbour = mesh.faceNeighbour();
 
-    labelList neiFaceOwner(mesh.nFaces() - mesh.nInternalFaces(), label(-1));
+    labelList neiFaceOwner(mesh.nBoundaryFaces(), label(-1));
 
     const polyBoundaryMesh& patches = mesh.boundaryMesh();
 
@@ -421,7 +421,7 @@ void Foam::conformalVoronoiMesh::calcFaceZones
         )
     );
 
-    pointField neiCc(mesh.nFaces() - mesh.nInternalFaces());
+    pointField neiCc(mesh.nBoundaryFaces());
     calcNeighbourCellCentres
     (
         mesh,
@@ -498,7 +498,7 @@ void Foam::conformalVoronoiMesh::calcFaceZones
     }
 
 
-//    labelList neiCellSurface(mesh.nFaces()-mesh.nInternalFaces());
+//    labelList neiCellSurface(mesh.nBoundaryFaces());
 //
 //    forAll(patches, patchi)
 //    {

applications/utilities/mesh/generation/foamyMesh/foamyHexMeshBackgroundMesh/foamyHexMeshBackgroundMesh.C

@@ -119,7 +119,7 @@ void printMeshData(const polyMesh& mesh)
 
     // Print stats
 
-    globalIndex globalBoundaryFaces(mesh.nFaces()-mesh.nInternalFaces());
+    globalIndex globalBoundaryFaces(mesh.nBoundaryFaces());
 
     label maxProcCells = 0;
     label totProcFaces = 0;

applications/utilities/mesh/manipulation/checkMesh/checkTools.C

@@ -314,7 +314,7 @@ void Foam::mergeAndWrite
     }
 
 
-    boolList bndInSet(mesh.nFaces()-mesh.nInternalFaces());
+    boolList bndInSet(mesh.nBoundaryFaces());
     forAll(pbm, patchi)
     {
         const polyPatch& pp = pbm[patchi];

applications/utilities/mesh/manipulation/mergeOrSplitBaffles/mergeOrSplitBaffles.C

@@ -249,7 +249,7 @@ labelList findBaffles(const polyMesh& mesh, const labelList& boundaryFaces)
         (
             mesh,
             "duplicateFaces",
-            (mesh.nFaces() - mesh.nInternalFaces())/256
+            mesh.nBoundaryFaces()/256
         );
 
         forAll(duplicates, bFacei)

applications/utilities/mesh/manipulation/orientFaceZone/orientFaceZone.C

@@ -295,11 +295,7 @@ int main(int argc, char *argv[])
     {
         const polyBoundaryMesh& bm = mesh.boundaryMesh();
 
-        labelList neiStatus
-        (
-            mesh.nFaces()-mesh.nInternalFaces(),
-            orientedSurface::UNVISITED
-        );
+        labelList neiStatus(mesh.nBoundaryFaces(), orientedSurface::UNVISITED);
 
         forAll(faceLabels, i)
         {

applications/utilities/mesh/manipulation/polyDualMesh/polyDualMeshApp.C

@@ -140,7 +140,7 @@ void simpleMarkFeatures
         SubList<face>
         (
             mesh.faces(),
-            mesh.nFaces()-mesh.nInternalFaces(),
+            mesh.nBoundaryFaces(),
             mesh.nInternalFaces()
         ),
         mesh.points()
@@ -238,7 +238,7 @@ void simpleMarkFeatures
     // ~~~~~~~~~~~~~~~~~~~~~~~~~
 
     // Face centres that need inclusion in the dual mesh
-    labelHashSet featureFaceSet(mesh.nFaces()-mesh.nInternalFaces());
+    labelHashSet featureFaceSet(mesh.nBoundaryFaces());
     // A. boundary faces.
     for (label facei = mesh.nInternalFaces(); facei < mesh.nFaces(); facei++)
     {

applications/utilities/mesh/manipulation/splitMeshRegions/splitMeshRegions.C

@@ -353,7 +353,7 @@ void getInterfaceSizes
     // ~~~~~~~~~~~~~~
 
     // Neighbour cellRegion.
-    labelList coupledRegion(mesh.nFaces()-mesh.nInternalFaces());
+    labelList coupledRegion(mesh.nBoundaryFaces());
 
     forAll(coupledRegion, i)
     {
@@ -641,7 +641,7 @@ autoPtr<mapPolyMesh> createRegionMesh
 
 
     // Neighbour cellRegion.
-    labelList coupledRegion(mesh.nFaces()-mesh.nInternalFaces());
+    labelList coupledRegion(mesh.nBoundaryFaces());
 
     forAll(coupledRegion, i)
     {
@@ -1232,7 +1232,7 @@ void getZoneID
     }
 
     // Neighbour zoneID.
-    neiZoneID.setSize(mesh.nFaces()-mesh.nInternalFaces());
+    neiZoneID.setSize(mesh.nBoundaryFaces());
 
     forAll(neiZoneID, i)
     {
@@ -1263,7 +1263,7 @@ void matchRegions
 
     // Get current per cell zoneID
     labelList zoneID(mesh.nCells(), -1);
-    labelList neiZoneID(mesh.nFaces()-mesh.nInternalFaces());
+    labelList neiZoneID(mesh.nBoundaryFaces());
     getZoneID(mesh, cellZones, zoneID, neiZoneID);
 
     // Sizes per cellzone
@@ -1552,7 +1552,7 @@ int main(int argc, char *argv[])
     // Existing zoneID
     labelList zoneID(mesh.nCells(), -1);
     // Neighbour zoneID.
-    labelList neiZoneID(mesh.nFaces()-mesh.nInternalFaces());
+    labelList neiZoneID(mesh.nBoundaryFaces());
     getZoneID(mesh, cellZones, zoneID, neiZoneID);
 
 
@@ -1622,7 +1622,7 @@ int main(int argc, char *argv[])
         );
 
         labelList newZoneID(mesh.nCells(), -1);
-        labelList newNeiZoneID(mesh.nFaces()-mesh.nInternalFaces());
+        labelList newNeiZoneID(mesh.nBoundaryFaces());
         getZoneID(mesh, newCellZones, newZoneID, newNeiZoneID);
 
         label unzonedCelli = newZoneID.find(-1);