Add the OpenFOAM source tree

applications/utilities/mesh/manipulation/splitMesh/regionSide.H

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+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::regionSide
+
+Description
+    Determines the 'side' for every face and connected to a
+    singly-connected (through edges) region of faces. Gets set of faces and
+    a list of mesh edges ('fenceEdges') which should not be crossed.
+    Used in splitting a mesh region.
+
+    Determines:
+    - For every face on the surface: whether the owner was visited
+      from starting face.
+    - List of faces using an internal point of the region visitable by
+      edge-face-edge walking from the correct side of the region.
+
+SourceFiles
+    regionSide.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef regionSide_H
+#define regionSide_H
+
+#include "HashSet.H"
+#include "typeInfo.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// Forward declaration of classes
+class primitiveMesh;
+
+/*---------------------------------------------------------------------------*\
+                           Class regionSide Declaration
+\*---------------------------------------------------------------------------*/
+
+class regionSide
+{
+    // Private data
+
+        //- For every face on region tells whether the owner is on the
+        //  'regionside'.
+        labelHashSet sideOwner_;
+
+        //- Contains the faces using an internal point and visited face
+        labelHashSet insidePointFaces_;
+
+
+    // Private Member Functions
+
+        //- Step across point to other edge on face
+        static label otherEdge
+        (
+            const primitiveMesh& mesh,
+            const label faceI,
+            const label edgeI,
+            const label pointI
+        );
+
+        //- From faceI, side cellI, cross to other faces/cells by
+        //  face-cell walking and store visited faces and update sideOwner_.
+        void visitConnectedFaces
+        (
+            const primitiveMesh& mesh,
+            const labelHashSet& region,
+            const labelHashSet& fenceEdges,
+            const label cellI,
+            const label faceI,
+            labelHashSet& visitedFace
+        );
+
+        //- From edge on face connected to point on region (regionPointI) cross
+        //  to all other edges using this point by walking across faces
+        //  Does not cross regionEdges so stays on one side of region
+        void walkPointConnectedFaces
+        (
+            const primitiveMesh& mesh,
+            const labelHashSet& regionEdges,
+            const label regionPointI,
+            const label startFaceI,
+            const label startEdgeI,
+            labelHashSet& visitedEdges
+        );
+
+        //- Visits all internal points on region and marks edges reachable
+        //  from sideOwner side (using walkPointConnectedFaces)
+        void walkAllPointConnectedFaces
+        (
+            const primitiveMesh& mesh,
+            const labelHashSet& regionFaces,
+            const labelHashSet& fenceEdges
+        );
+
+public:
+
+    //- Runtime type information
+    ClassName("regionSide");
+
+    // Static Functions
+
+        //- Step across edge onto other face on cell
+        static label otherFace
+        (
+            const primitiveMesh& mesh,
+            const label cellI,
+            const label excludeFaceI,
+            const label edgeI
+        );
+
+
+    // Constructors
+
+        //- Construct from components
+        regionSide
+        (
+            const primitiveMesh& mesh,
+            const labelHashSet& region,
+            const labelHashSet& fenceEdges,   // labels of fence edges
+            const label startCell,
+            const label startFace
+        );
+
+
+    // Member Functions
+
+        // Access
+
+            const labelHashSet& sideOwner() const
+            {
+                return sideOwner_;
+            }
+
+            const labelHashSet& insidePointFaces() const
+            {
+                return insidePointFaces_;
+            }
+
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //