Test-findCell-octree.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2015 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 "argList.H"
#include "Time.H"
#include "fvMesh.H"
#include "IStringStream.H"
#include "indexedOctree.H"
#include "treeDataCell.H"
#include "OFstream.H"
 
using namespace Foam;
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Main program:
 
int main(int argc, char *argv[])
{
    argList::validArgs.append("point (x y z)");
 
    #include "setRootCase.H"
    #include "createTime.H"
    #include "createMesh.H"
 
    label nReps = 10000;
 
    const point sample = args.argRead<point>(1);
 
    const polyMesh::cellDecomposition decompMode = polyMesh::CELL_TETS;
 
    treeBoundBox meshBb(mesh.bounds());
 
    // Calculate typical cell related size to shift bb by.
    scalar typDim = meshBb.avgDim()/(2.0*Foam::cbrt(scalar(mesh.nCells())));
 
    treeBoundBox shiftedBb
    (
        meshBb.min(),
        meshBb.max() + vector(typDim, typDim, typDim)
    );
 
    Info<< "Mesh" << endl;
    Info<< "   bounding box           : " << meshBb << endl;
    Info<< "   bounding box (shifted) : " << shiftedBb << endl;
    Info<< "   typical dimension      : " << shiftedBb.typDim() << endl;
 
    Info<< "Initialised mesh in "
        << runTime.cpuTimeIncrement() << " s" << endl;
 
    {
        indexedOctree<treeDataCell> ioc
        (
            treeDataCell(true, mesh, decompMode), //FACEDIAGTETS),
            shiftedBb,
            10,         // maxLevel
            100,        // leafsize
            10.0        // duplicity
        );
 
        for (label i = 0; i < nReps - 1 ; i++)
        {
            if ((i % 100) == 0)
            {
                Info<< "indexed octree for " << i << endl;
            }
            ioc.findInside(sample);
        }
 
        Info<< "Point:" << sample << " is in shape "
            << ioc.findInside(sample)
            << ", where the possible cells were:" << nl
            << ioc.findIndices(sample)
            << endl;
 
        Info<< "Found in indexedOctree " << nReps << " times in "
            << runTime.cpuTimeIncrement() << " s" << endl;
    }
 
    {
        for (label i = 0; i < nReps - 1 ; i++)
        {
            if ((i % 100) == 0)
            {
                Info<< "linear search for " << i << endl;
            }
            mesh.findCell(sample, decompMode);
        }
 
        Info<< "Point:" << sample << " is in cell  "
            << mesh.findCell(sample, decompMode) << endl;
 
        Info<< "Found in mesh.findCell " << nReps << " times in "
            << runTime.cpuTimeIncrement() << " s" << endl;
    }
 
    Info<< "End\n" << endl;
 
    return 0;
}
 
 
// ************************************************************************* //