primitiveMeshCells.C

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     3.2
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
    This file is part of foam-extend.
 
    foam-extend 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.
 
    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
 
\*---------------------------------------------------------------------------*/
 
#include "primitiveMesh.H"
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::primitiveMesh::calcCells
(
    cellList& cellFaceAddr,
    const unallocLabelList& own,
    const unallocLabelList& nei,
    const label inNCells
)
{
    label nCells = inNCells;
 
    if (nCells == -1)
    {
        nCells = -1;
 
        forAll (own, faceI)
        {
            nCells = max(nCells, own[faceI]);
        }
        nCells++;
    }
 
    // 1. Count number of faces per cell
 
    labelList ncf(nCells, 0);
 
    forAll (own, faceI)
    {
        ncf[own[faceI]]++;
    }
 
    forAll (nei, faceI)
    {
        if (nei[faceI] >= 0)
        {
            ncf[nei[faceI]]++;
        }
    }
 
    // Create the storage
    cellFaceAddr.setSize(ncf.size());
 
 
    // 2. Size and fill cellFaceAddr
 
    forAll (cellFaceAddr, cellI)
    {
        cellFaceAddr[cellI].setSize(ncf[cellI]);
    }
    ncf = 0;
 
    forAll (own, faceI)
    {
        label cellI = own[faceI];
 
        cellFaceAddr[cellI][ncf[cellI]++] = faceI;
    }
 
    forAll (nei, faceI)
    {
        label cellI = nei[faceI];
 
        if (cellI >= 0)
        {
            cellFaceAddr[cellI][ncf[cellI]++] = faceI;
        }
    }
}
 
 
void Foam::primitiveMesh::calcCells() const
{
    // Loop through faceCells and mark up neighbours
 
    if (debug)
    {
        Pout<< "primitiveMesh::calcCells() : calculating cells"
            << endl;
    }
 
    // It is an error to attempt to recalculate cells
    // if the pointer is already set
    if (cfPtr_)
    {
        FatalErrorIn("primitiveMesh::calcCells() const")
            << "cells already calculated"
            << abort(FatalError);
    }
    else
    {
        // Create the storage
        cfPtr_ = new cellList(nCells());
        cellList& cellFaceAddr = *cfPtr_;
 
        calcCells
        (
            cellFaceAddr,
            faceOwner(),
            faceNeighbour(),
            nCells()
        );
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
const Foam::cellList& Foam::primitiveMesh::cells() const
{
    if (!cfPtr_)
    {
        calcCells();
    }
 
    return *cfPtr_;
}
 
 
// ************************************************************************* //