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    /*---------------------------------------------------------------------------*\
      =========                 |
      \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
       \\    /   O peration     |
        \\  /    A nd           | Copyright (C) 1991-2007 OpenCFD Ltd.
         \\/     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 2 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, write to the Free Software Foundation,
        Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    
    \*---------------------------------------------------------------------------*/
    
    #include "mergePolyMesh.H"
    #include "Time.H"
    #include "polyTopoChanger.H"
    #include "mapPolyMesh.H"
    #include "polyAddPoint.H"
    #include "polyAddCell.H"
    #include "polyAddFace.H"
    
    // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
    
    namespace Foam
    {
        defineTypeNameAndDebug(mergePolyMesh, 1);
    }
    
    
    // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
    
    Foam::label Foam::mergePolyMesh::patchIndex(const polyPatch& p)
    {
        // Find the patch name on the list.  If the patch is already there
        // and patch types match, return index
        const word& pType = p.type();
        const word& pName = p.name();
    
        bool nameFound = false;
    
        forAll (patchNames_, patchI)
        {
            if (patchNames_[patchI] == pName)
            {
                if (patchTypes_[patchI] == pType)
                {
                    // Found name and types match
                    return patchI;
                }
                else
                {
                    // Found the name, but type is different
                    nameFound = true;
                }
            }
        }
    
        // Patch not found.  Append to the list
        patchTypes_.append(pType);
    
        if (nameFound)
        {
            // Duplicate name is not allowed.  Create a composite name from the
            // patch name and case name
            const word& caseName = p.boundaryMesh().mesh().time().caseName();
    
            patchNames_.append(pName + "_" + caseName);
    
            Info<< "label patchIndex(const polyPatch& p) : "
                << "Patch " << p.index() << " named "
                << pName << " in mesh " << caseName
                << " already exists, but patch types "
                << " do not match.\nCreating a composite name as "
                << patchNames_[patchNames_.size() - 1] << endl;
        }
        else
        {
            patchNames_.append(pName);
        }
    
        return patchNames_.size() - 1;
    }
    
    
    Foam::label Foam::mergePolyMesh::zoneIndex
    (
        DynamicList<word>& names,
        const word& curName
    )
    {
        forAll (names, zoneI)
        {
            if (names[zoneI] == curName)
            {
                return zoneI;
            }
        }
    
        // Not found.  Add new name to the list
        names.append(curName);
    
        return names.size() - 1;
    }
    
    
    // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
    
    Foam::mergePolyMesh::mergePolyMesh(const IOobject& io)
    :
        polyMesh(io),
        meshMod_(*this),
        patchTypes_(2*boundaryMesh().size()),
        patchNames_(2*boundaryMesh().size()),
        pointZoneNames_(),
        faceZoneNames_(),
        cellZoneNames_()
    {
        // Insert the original patches into the list
        wordList curPatchTypes = boundaryMesh().types();
        wordList curPatchNames = boundaryMesh().names();
    
        forAll (curPatchTypes, patchI)
        {
            patchTypes_.append(curPatchTypes[patchI]);
            patchNames_.append(curPatchNames[patchI]);
        }
    
        // Insert point, face and cell zones into the list
    
        // Point zones
        wordList curPointZoneNames = pointZones().names();
        if (curPointZoneNames.size() > 0)
        {
            pointZoneNames_.setSize(2*curPointZoneNames.size());
        }
    
        forAll (curPointZoneNames, zoneI)
        {
            pointZoneNames_.append(curPointZoneNames[zoneI]);
        }
    
        // Face zones
        wordList curFaceZoneNames = faceZones().names();
    
        if (curFaceZoneNames.size() > 0)
        {
            faceZoneNames_.setSize(2*curFaceZoneNames.size());
        }
        forAll (curFaceZoneNames, zoneI)
        {
            faceZoneNames_.append(curFaceZoneNames[zoneI]);
        }
    
        // Cell zones
        wordList curCellZoneNames = cellZones().names();
    
        if (curCellZoneNames.size() > 0)
        {
            cellZoneNames_.setSize(2*curCellZoneNames.size());
        }
        forAll (curCellZoneNames, zoneI)
        {
            cellZoneNames_.append(curCellZoneNames[zoneI]);
        }
    }
    
    
    // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
    
    
    // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
    
    void Foam::mergePolyMesh::addMesh(const polyMesh& m)
    {
        // Add all the points, faces and cells of the new mesh
    
        // Add points
    
        label zoneID = -1;
    
        const pointField& p = m.points();
        labelList renumberPoints(p.size());
    
        const pointZoneMesh& pz = m.pointZones();
        labelList pointZoneIndices(pz.size());
    
        forAll (pz, zoneI)
        {
            pointZoneIndices[zoneI] = zoneIndex(pointZoneNames_, pz[zoneI].name());
        }
    
        forAll (p, pointI)
        {
            // Grab zone ID.  If a point is not in a zone, it will return -1
            zoneID = pz.whichZone(pointI);
    
            if (zoneID > 0)
            {
                // Translate zone ID into the new index
                zoneID = pointZoneIndices[zoneID];
            }
    
            renumberPoints[pointI] =
                meshMod_.setAction
                (
                    polyAddPoint
                    (
                        p[pointI],            // Point to add
                        -1,                   // Master point (straight addition)
                        zoneID,               // Zone for point
                        pointI < m.nPoints()  // Is in cell?
                    )
                );
        }
    
        // Add cells
    
        const cellList& c = m.cells();
        labelList renumberCells(c.size());
    
        const cellZoneMesh& cz = m.cellZones();
        labelList cellZoneIndices(cz.size());
    
        forAll (cz, zoneI)
        {
            cellZoneIndices[zoneI] = zoneIndex(cellZoneNames_, cz[zoneI].name());
        }
    
        forAll (c, cellI)
        {
            // Grab zone ID.  If a cell is not in a zone, it will return -1
            zoneID = cz.whichZone(cellI);
    
            if (zoneID > 0)
            {
                // Translate zone ID into the new index
                zoneID = cellZoneIndices[zoneID];
            }
    
            renumberCells[cellI] =
                meshMod_.setAction
                (
                    polyAddCell
                    (
                        -1,                   // Master point
                        -1,                   // Master edge
                        -1,                   // Master face
                        -1,                   // Master cell
                        zoneID                // Zone for cell
                    )
                );
        }
    
        // Add faces
        const polyBoundaryMesh& bm = m.boundaryMesh();
    
        // Gather the patch indices
        labelList patchIndices(bm.size());
    
        forAll (patchIndices, patchI)
        {
            patchIndices[patchI] = patchIndex(bm[patchI]);
        }
    
        const faceZoneMesh& fz = m.faceZones();
        labelList faceZoneIndices(fz.size());
    
        forAll (fz, zoneI)
        {
            faceZoneIndices[zoneI] = zoneIndex(faceZoneNames_, fz[zoneI].name());
        }
    
        const faceList& f = m.faces();
        labelList renumberFaces(f.size());
    
        const labelList& own = m.faceOwner();
        const labelList& nei = m.faceNeighbour();
    
        label newOwn, newNei, newPatch, newZone;
        bool newZoneFlip;
    
        forAll (f, faceI)
        {
            const face& curFace = f[faceI];
    
            face newFace(curFace.size());
    
            forAll (curFace, pointI)
            {
                newFace[pointI] = renumberPoints[curFace[pointI]];
            }
    
            if (debug)
            {
                // Check that the face is valid
                if (min(newFace) < 0)
                {
                    FatalErrorIn("void mergePolyMesh::addMesh(const polyMesh&)")
                        << "Error in point mapping for face " << faceI
                        << ".  Old face: " << curFace << " New face: " << newFace
                        << abort(FatalError);
                }
            }
    
            newOwn = own[faceI];
            if (newOwn > -1) newOwn = renumberCells[newOwn];
    
            newNei = nei[faceI];
            if (newNei > -1) newNei = renumberCells[newNei];
    
            if (faceI < m.nInternalFaces() || faceI >= m.nFaces())
            {
                newPatch = -1;
            }
            else
            {
                newPatch = patchIndices[bm.whichPatch(faceI)];
            }
    
            newZone = fz.whichZone(faceI);
            newZoneFlip = false;
    
            if (newZone > -1)
            {
                newZoneFlip = fz[newZone].flipMap()[fz[newZone].whichFace(faceI)];
    
                // Grab the new zone
                newZone = faceZoneIndices[newZone];
            }
    
            renumberFaces[faceI] =
                meshMod_.setAction
                (
                    polyAddFace
                    (
                        newFace,
                        newOwn,
                        newNei,
                        -1,
                        -1,
                        -1,
                        false,
                        newPatch,
                        newZone,
                        newZoneFlip
                    )
                );
        }
            
    }
    
    
    void Foam::mergePolyMesh::merge()
    {
        Info<< "patch names: " << patchNames_ << nl
            << "patch types: " << patchTypes_ << nl
            << "point zone names: " << pointZoneNames_ << nl
            << "face zone names: " << faceZoneNames_ << nl
            << "cell zone names: " << cellZoneNames_ << endl;
    
        // Add the patches if necessary
        if (patchNames_.size() != boundaryMesh().size())
        {
            Info << "Copying old patches" << endl;
    
            List<polyPatch*> newPatches(patchNames_.size());
    
            const polyBoundaryMesh& oldPatches = boundaryMesh();
    
            // Note.  Re-using counter in two for loops
            label patchI = 0;
    
            for (patchI = 0; patchI < oldPatches.size(); patchI++)
            {
                newPatches[patchI] = oldPatches[patchI].clone(oldPatches).ptr();
            }
    
            Info << "Adding new patches. " << endl;
    
            label endOfLastPatch =
                oldPatches[patchI - 1].start() + oldPatches[patchI - 1].size();
    
            for (; patchI < patchNames_.size(); patchI++)
            {
                // Add a patch
                newPatches[patchI] =
                (
                    polyPatch::New
                    (
                        patchTypes_[patchI],
                        patchNames_[patchI],
                        0,
                        endOfLastPatch,
                        patchI,
                        oldPatches
                    ).ptr()
                );
            }
    
            removeBoundary();
            addPatches(newPatches);
        }
    
        // Add the zones if necessary
        if
        (
            pointZoneNames_.size() != pointZones().size()
         || faceZoneNames_.size() != faceZones().size()
         || cellZoneNames_.size() != cellZones().size()
        )
        {
    
        }
    
        // Change mesh. No inflation
        meshMod_.changeMesh(*this, false);
    
        // Clear topo change for the next operation
        meshMod_.clear();
    }
    
    
    // ************************************************************************* //