mapFields: Reinstated mapFields from OpenFOAM-2.2.x and renamed the current mapFields -> mapFieldsPar

This required the addition of the meshToMesh class in the sampling
library from OpenFOAM-2.2.x which is now named meshToMesh0.

src/sampling/meshToMesh/calcMethod/meshToMeshMethod/meshToMeshMethod.C

@@ -0,0 +1,260 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013-2015 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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "meshToMeshMethod.H"
+#include "tetOverlapVolume.H"
+#include "OFstream.H"
+#include "Time.H"
+#include "treeBoundBox.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineTypeNameAndDebug(meshToMeshMethod, 0);
+    defineRunTimeSelectionTable(meshToMeshMethod, components);
+}
+
+Foam::scalar Foam::meshToMeshMethod::tolerance_ = 1e-6;
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+Foam::labelList Foam::meshToMeshMethod::maskCells() const
+{
+    boundBox intersectBb
+    (
+        max(src_.bounds().min(), tgt_.bounds().min()),
+        min(src_.bounds().max(), tgt_.bounds().max())
+    );
+
+    intersectBb.inflate(0.01);
+
+    const cellList& srcCells = src_.cells();
+    const faceList& srcFaces = src_.faces();
+    const pointField& srcPts = src_.points();
+
+    DynamicList<label> cells(src_.nCells());
+    forAll(srcCells, srcI)
+    {
+        boundBox cellBb(srcCells[srcI].points(srcFaces, srcPts), false);
+        if (intersectBb.overlaps(cellBb))
+        {
+            cells.append(srcI);
+        }
+    }
+
+    if (debug)
+    {
+        Pout<< "participating source mesh cells: " << cells.size() << endl;
+    }
+
+    return cells;
+}
+
+
+bool Foam::meshToMeshMethod::intersect
+(
+    const label srcCellI,
+    const label tgtCellI
+) const
+{
+    scalar threshold = tolerance_*src_.cellVolumes()[srcCellI];
+
+    tetOverlapVolume overlapEngine;
+
+    treeBoundBox bbTgtCell(tgt_.points(), tgt_.cellPoints()[tgtCellI]);
+
+    return overlapEngine.cellCellOverlapMinDecomp
+    (
+        src_,
+        srcCellI,
+        tgt_,
+        tgtCellI,
+        bbTgtCell,
+        threshold
+    );
+}
+
+
+Foam::scalar Foam::meshToMeshMethod::interVol
+(
+    const label srcCellI,
+    const label tgtCellI
+) const
+{
+    tetOverlapVolume overlapEngine;
+
+    treeBoundBox bbTgtCell(tgt_.points(), tgt_.cellPoints()[tgtCellI]);
+
+    scalar vol = overlapEngine.cellCellOverlapVolumeMinDecomp
+    (
+        src_,
+        srcCellI,
+        tgt_,
+        tgtCellI,
+        bbTgtCell
+    );
+
+    return vol;
+}
+
+
+void Foam::meshToMeshMethod::appendNbrCells
+(
+    const label cellI,
+    const polyMesh& mesh,
+    const DynamicList<label>& visitedCells,
+    DynamicList<label>& nbrCellIDs
+) const
+{
+    const labelList& nbrCells = mesh.cellCells()[cellI];
+
+    // filter out cells already visited from cell neighbours
+    forAll(nbrCells, i)
+    {
+        label nbrCellI = nbrCells[i];
+
+        if
+        (
+            (findIndex(visitedCells, nbrCellI) == -1)
+         && (findIndex(nbrCellIDs, nbrCellI) == -1)
+        )
+        {
+            nbrCellIDs.append(nbrCellI);
+        }
+    }
+}
+
+
+bool Foam::meshToMeshMethod::initialise
+(
+    labelListList& srcToTgtAddr,
+    scalarListList& srcToTgtWght,
+    labelListList& tgtToSrcAddr,
+    scalarListList& tgtToSrcWght
+) const
+{
+    srcToTgtAddr.setSize(src_.nCells());
+    srcToTgtWght.setSize(src_.nCells());
+    tgtToSrcAddr.setSize(tgt_.nCells());
+    tgtToSrcWght.setSize(tgt_.nCells());
+
+    if (!src_.nCells())
+    {
+        return false;
+    }
+    else if (!tgt_.nCells())
+    {
+        if (debug)
+        {
+            Pout<< "mesh interpolation: hhave " << src_.nCells() << " source "
+                << " cells but no target cells" << endl;
+        }
+
+        return false;
+    }
+
+    return true;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::meshToMeshMethod::meshToMeshMethod
+(
+    const polyMesh& src,
+    const polyMesh& tgt
+)
+:
+    src_(src),
+    tgt_(tgt),
+    V_(0.0)
+{
+    if (!src_.nCells() || !tgt_.nCells())
+    {
+        if (debug)
+        {
+            Pout<< "mesh interpolation: cells not on processor: Source cells = "
+                << src_.nCells() << ", target cells = " << tgt_.nCells()
+                << endl;
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::meshToMeshMethod::~meshToMeshMethod()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::meshToMeshMethod::writeConnectivity
+(
+    const polyMesh& mesh1,
+    const polyMesh& mesh2,
+    const labelListList& mesh1ToMesh2Addr
+) const
+{
+    Pout<< "Source size = " << mesh1.nCells() << endl;
+    Pout<< "Target size = " << mesh2.nCells() << endl;
+
+    word fName("addressing_" + mesh1.name() + "_to_" + mesh2.name());
+
+    if (Pstream::parRun())
+    {
+        fName = fName +  "_proc" + Foam::name(Pstream::myProcNo());
+    }
+
+    OFstream os(src_.time().path()/fName + ".obj");
+
+    label vertI = 0;
+    forAll(mesh1ToMesh2Addr, i)
+    {
+        const labelList& addr = mesh1ToMesh2Addr[i];
+        forAll(addr, j)
+        {
+            label cellI = addr[j];
+            const vector& c0 = mesh1.cellCentres()[i];
+
+            const cell& c = mesh2.cells()[cellI];
+            const pointField pts(c.points(mesh2.faces(), mesh2.points()));
+            forAll(pts, j)
+            {
+                const point& p = pts[j];
+                os  << "v " << p.x() << ' ' << p.y() << ' ' << p.z() << nl;
+                vertI++;
+                os  << "v " << c0.x() << ' ' << c0.y() << ' ' << c0.z()
+                    << nl;
+                vertI++;
+                os  << "l " << vertI - 1 << ' ' << vertI << nl;
+            }
+        }
+    }
+}
+
+
+// ************************************************************************* //