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readTRI.C
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readTRI.C
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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 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/>.
Description
TRI (triangle) file reader. Comes out of e.g. AC3D.
lines are 9 floats (3 points, each 3 floats) followed by hex colour.
Is converted into regions: regions numbered from 0 up, each colour is
region.
Most of reading/stitching taken from STL reader.
\*---------------------------------------------------------------------------*/
#include "triSurface.H"
#include "STLpoint.H"
#include "SLList.H"
#include "IFstream.H"
#include "readHexLabel.H"
#include "stringList.H"
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
bool Foam::triSurface::readTRI(const fileName& TRIfileName)
{
IFstream TRIfile(TRIfileName);
if (!TRIfile.good())
{
FatalErrorInFunction
<< "Cannot read file " << TRIfileName
<< exit(FatalError);
}
SLList<STLpoint> STLpoints;
SLList<label> STLlabels;
HashTable<label, string> STLsolidNames;
// Max region number so far
label maxRegion = 0;
while (TRIfile)
{
string line = getLineNoComment(TRIfile);
if (line.empty())
{
break;
}
IStringStream lineStream(line);
STLpoint p
(
readScalar(lineStream),
readScalar(lineStream),
readScalar(lineStream)
);
if (!lineStream) break;
STLpoints.append(p);
STLpoints.append
(
STLpoint
(
readScalar(lineStream),
readScalar(lineStream),
readScalar(lineStream)
)
);
STLpoints.append
(
STLpoint
(
readScalar(lineStream),
readScalar(lineStream),
readScalar(lineStream)
)
);
// Region/colour in .tri file starts with 0x. Skip.
char zero;
lineStream >> zero;
word rawSolidName(lineStream);
word solidName("patch" + rawSolidName(1, rawSolidName.size()-1));
label region = -1;
HashTable<label, string>::const_iterator fnd =
STLsolidNames.find(solidName);
if (fnd != STLsolidNames.end())
{
region = fnd();
}
else
{
Pout<< "Mapping triangle colour 0" << rawSolidName
<< " to region " << maxRegion << " name " << solidName
<< endl;
region = maxRegion++;
STLsolidNames.insert(solidName, region);
}
STLlabels.append(region);
}
pointField rawPoints(STLpoints.size());
label pointi = 0;
forAllConstIter(SLList<STLpoint>, STLpoints, iter)
{
rawPoints[pointi++] = *iter;
}
setSize(STLlabels.size());
// Assign triangles
pointi = 0;
SLList<label>::const_iterator iter = STLlabels.begin();
forAll(*this, i)
{
operator[](i)[0] = pointi++;
operator[](i)[1] = pointi++;
operator[](i)[2] = pointi++;
operator[](i).region() = *iter;
++iter;
}
// Assign coordinates
storedPoints().transfer(rawPoints);
// Merge duplicate points
stitchTriangles();
// Convert solidNames into regionNames
stringList names(STLsolidNames.toc());
patches_.setSize(names.size());
forAll(names, nameI)
{
patches_[nameI].name() = names[nameI];
patches_[nameI].geometricType() = "empty";
}
return true;
}
// ************************************************************************* //