mapPatchChange.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
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
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    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::mapPatchChange
 
Description
    Class containing mesh-to-mesh mapping information after a patch change
    operation.
 
SourceFiles
 
\*---------------------------------------------------------------------------*/
 
#ifndef mapPatchChange_H
#define mapPatchChange_H
 
#include "labelList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class mapPatchChange Declaration
\*---------------------------------------------------------------------------*/
 
class mapPatchChange
{
    // Private data
 
        //- Old patches
        const label nOldPatches_;
 
        //- Patch mapping array
        const labelList patchMap_;
 
public:
 
    // Constructors
 
        //- Construct from components
        mapPatchChange(const label nOldPatches, const labelList& patchMap)
        :
            nOldPatches_(nOldPatches),
            patchMap_(patchMap)
        {}
 
 
    // Member Functions
 
        // Access
 
            //- Number of old patches
            label nOldPatches() const
            {
                return nOldPatches_;
            }
 
            //- Patch map. Size of current patches.
            //  -1  : patch was added
            //  >=0 : old position of patch
            //  any original patch which is not in the list has been deleted
            const labelList& patchMap() const
            {
                return patchMap_;
            }
 
 
        // Utility functions
 
            //- Labels of added patches
            labelList addedPatches() const
            {
                labelList added(patchMap_.size());
 
                label addedI = 0;
 
                forAll(patchMap_, patchi)
                {
                    if (patchMap_[patchi] == -1)
                    {
                        added[addedI++] = patchi;
                    }
                }
                added.setSize(addedI);
                return added;
            }
 
            //- Labels (on old mesh) of deleted patches
            labelList deletedPatches() const
            {
                labelList oldToNew(nOldPatches_, -1);
 
                // Mark all preserved patches
                forAll(patchMap_, patchi)
                {
                    if (patchMap_[patchi] != -1)
                    {
                        oldToNew[patchMap_[patchi]] = patchi;
                    }
                }
 
                // Extract -1 elements from oldToNew. These are the deleted
                // patches.
                label deletedI = 0;
 
                forAll(oldToNew, oldPatchi)
                {
                    if (oldToNew[oldPatchi] == -1)
                    {
                        oldToNew[deletedI++] = oldPatchi;
                    }
                }
 
                oldToNew.setSize(deletedI);
 
                return oldToNew;
            }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //