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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2012-2015 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/>.
Application
Test-tetTetOverlap
Description
Overlap volume of two tets
\*---------------------------------------------------------------------------*/
#include "tetrahedron.H"
#include "OFstream.H"
#include "meshTools.H"
using namespace Foam;
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
void writeOBJ
(
Ostream& os,
label& vertI,
const tetPoints& tet
)
{
forAll(tet, fp)
{
meshTools::writeOBJ(os, tet[fp]);
}
os << "l " << vertI+1 << ' ' << vertI+2 << nl
<< "l " << vertI+1 << ' ' << vertI+3 << nl
<< "l " << vertI+1 << ' ' << vertI+4 << nl
<< "l " << vertI+2 << ' ' << vertI+3 << nl
<< "l " << vertI+2 << ' ' << vertI+4 << nl
<< "l " << vertI+3 << ' ' << vertI+4 << nl;
vertI += 4;
}
int main(int argc, char *argv[])
{
tetPoints A
(
point(0, 0, 0),
point(1, 0, 0),
point(1, 1, 0),
point(1, 1, 1)
);
const tetPointRef tetA = A.tet();
tetPoints B
(
point(0.1, 0.1, 0.1),
point(1.1, 0.1, 0.1),
point(1.1, 1.1, 0.1),
point(1.1, 1.1, 1.1)
);
const tetPointRef tetB = B.tet();
tetPointRef::tetIntersectionList insideTets;
label nInside = 0;
tetPointRef::tetIntersectionList outsideTets;
label nOutside = 0;
tetA.tetOverlap
(
tetB,
insideTets,
nInside,
outsideTets,
nOutside
);
// Dump to file
// ~~~~~~~~~~~~
{
OFstream str("tetA.obj");
Info<< "Writing A to " << str.name() << endl;
label vertI = 0;
writeOBJ(str, vertI, A);
}
{
OFstream str("tetB.obj");
Info<< "Writing B to " << str.name() << endl;
label vertI = 0;
writeOBJ(str, vertI, B);
}
{
OFstream str("inside.obj");
Info<< "Writing parts of A inside B to " << str.name() << endl;
label vertI = 0;
for (label i = 0; i < nInside; ++i)
{
writeOBJ(str, vertI, insideTets[i]);
}
}
{
OFstream str("outside.obj");
Info<< "Writing parts of A outside B to " << str.name() << endl;
label vertI = 0;
for (label i = 0; i < nOutside; ++i)
{
writeOBJ(str, vertI, outsideTets[i]);
}
}
// Check
// ~~~~~
Info<< "Vol A:" << tetA.mag() << endl;
scalar volInside = 0;
for (label i = 0; i < nInside; ++i)
{
volInside += insideTets[i].tet().mag();
}
Info<< "Vol A inside B:" << volInside << endl;
scalar volOutside = 0;
for (label i = 0; i < nOutside; ++i)
{
volOutside += outsideTets[i].tet().mag();
}
Info<< "Vol A outside B:" << volOutside << endl;
Info<< "Sum inside and outside:" << volInside+volOutside << endl;
if (mag(volInside+volOutside-tetA.mag()) > SMALL)
{
FatalErrorInFunction
<< "Tet volumes do not sum up to input tet."
<< exit(FatalError);
}
return 0;
}
// ************************************************************************* //
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