primitiveMesh.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2021-2024 OpenCFD Ltd.
-------------------------------------------------------------------------------
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
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\*---------------------------------------------------------------------------*/

#include "primitiveMesh.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
    defineTypeNameAndDebug(primitiveMesh, 0);
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::primitiveMesh::primitiveMesh()
:
    nInternalPoints_(0),    // note: points are considered ordered on empty mesh
    nPoints_(0),
    nInternal0Edges_(-1),
    nInternal1Edges_(-1),
    nInternalEdges_(-1),
    nEdges_(-1),
    nInternalFaces_(0),
    nFaces_(0),
    nCells_(0)
{}


Foam::primitiveMesh::primitiveMesh
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells
)
:
    nInternalPoints_(-1),
    nPoints_(nPoints),
    nEdges_(-1),
    nInternalFaces_(nInternalFaces),
    nFaces_(nFaces),
    nCells_(nCells)
{}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::primitiveMesh::~primitiveMesh()
{
    clearOut();
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

bool Foam::primitiveMesh::calcPointOrder
(
    label& nInternalPoints,
    labelList& oldToNew,
    const faceList& faces,
    const label nInternalFaces,
    const label nPoints
)
{
    // Internal points are points that are not used by a boundary face.

    // Map from old to new position
    oldToNew.resize_nocopy(nPoints);
    oldToNew = -1;


    // 1. Create compact addressing for boundary points. Start off by indexing
    // from 0 inside oldToNew. (shifted up later on)

    label nBoundaryPoints = 0;
    for (label facei = nInternalFaces; facei < faces.size(); ++facei)
    {
        const face& f = faces[facei];

        for (label pointi : f)
        {
            if (oldToNew[pointi] == -1)
            {
                oldToNew[pointi] = nBoundaryPoints++;
            }
        }
    }

    // Now we know the number of boundary and internal points

    nInternalPoints = nPoints - nBoundaryPoints;

    // Move the boundary addressing up
    forAll(oldToNew, pointi)
    {
        if (oldToNew[pointi] != -1)
        {
            oldToNew[pointi] += nInternalPoints;
        }
    }


    // 2. Compact the internal points. Detect whether internal and boundary
    // points are mixed.

    label internalPointi = 0;

    bool ordered = true;

    for (label facei = 0; facei < nInternalFaces; facei++)
    {
        const face& f = faces[facei];

        for (label pointi : f)
        {
            if (oldToNew[pointi] == -1)
            {
                if (pointi >= nInternalPoints)
                {
                    ordered = false;
                }
                oldToNew[pointi] = internalPointi++;
            }
        }
    }

    return ordered;
}


void Foam::primitiveMesh::reset
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells
)
{
    clearOut();

    nPoints_ = nPoints;
    nEdges_ = -1;
    nInternal0Edges_ = -1;
    nInternal1Edges_ = -1;
    nInternalEdges_ = -1;

    nInternalFaces_ = nInternalFaces;
    nFaces_ = nFaces;
    nCells_ = nCells;

    // Check if points are ordered
    label nInternalPoints;
    labelList pointMap;

    bool isOrdered = calcPointOrder
    (
        nInternalPoints,
        pointMap,
        faces(),
        nInternalFaces_,
        nPoints_
    );

    if (isOrdered)
    {
        nInternalPoints_ = nInternalPoints;
    }
    else
    {
        nInternalPoints_ = -1;
    }

    if (debug)
    {
        Pout<< "primitiveMesh::reset : mesh reset to"
            << " nInternalPoints:" << nInternalPoints_
            << " nPoints:" << nPoints_
            << " nEdges:" << nEdges_
            << " nInternalFaces:" << nInternalFaces_
            << " nFaces:" << nFaces_
            << " nCells:" << nCells_
            << endl;
    }
}


void Foam::primitiveMesh::reset
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells,
    cellList& clst
)
{
    reset
    (
        nPoints,
        nInternalFaces,
        nFaces,
        nCells
    );

    cfPtr_ = std::make_unique<cellList>(std::move(clst));
}


void Foam::primitiveMesh::resetGeometry
(
    pointField&& faceCentres,
    pointField&& faceAreas,
    pointField&& cellCentres,
    scalarField&& cellVolumes
)
{
    if
    (
        faceCentres.size() != nFaces_
     || faceAreas.size() != nFaces_
     || cellCentres.size() != nCells_
     || cellVolumes.size() != nCells_
    )
    {
        FatalErrorInFunction
            << "Wrong sizes of passed in face/cell data"
            << abort(FatalError);
    }

    // Remove old geometry
    clearGeom();

    faceCentresPtr_ = std::make_unique<pointField>(std::move(faceCentres));
    faceAreasPtr_ = std::make_unique<pointField>(std::move(faceAreas));
    cellCentresPtr_ = std::make_unique<pointField>(std::move(cellCentres));
    cellVolumesPtr_ = std::make_unique<scalarField>(std::move(cellVolumes));

    if (debug)
    {
        Pout<< "primitiveMesh::resetGeometry : geometry reset for"
            << " nFaces:" << faceCentresPtr_->size()
            << " nCells:" << cellCentresPtr_->size() << endl;
    }
}


void Foam::primitiveMesh::movePoints
(
    const pointField& newPoints,
    const pointField& oldPoints
)
{
    // Note: the following clearout is now handled by the fvGeometryScheme
    // triggered by the call to updateGeom() in polyMesh::movePoints

    // Force recalculation of all geometric data with new points
    //clearGeom();
}


const Foam::cellShapeList& Foam::primitiveMesh::cellShapes() const
{
    if (!cellShapesPtr_)
    {
        calcCellShapes();
    }

    return *cellShapesPtr_;
}


void Foam::primitiveMesh::updateGeom()
{
    if (!faceCentresPtr_ || !faceAreasPtr_)
    {
        // These are always calculated in tandem, but only once
        calcFaceCentresAndAreas();
    }

    if (!cellCentresPtr_ || !cellVolumesPtr_)
    {
        // These are always calculated in tandem, but only once
        calcCellCentresAndVols();
    }
}


// ************************************************************************* //