writeSTL.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  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 "triSurface.H"
#include "STLtriangle.H"
#include "primitivePatch.H"
#include "HashTable.H"
#include "hashSignedLabel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void triSurface::writeSTLASCII(Ostream& os) const
{
    labelList faceMap;
 
    surfacePatchList myPatches(calcPatches(faceMap));
 
    label faceIndex = 0;
    forAll (myPatches, patchI)
    {
        // Print all faces belonging to this region
        const surfacePatch& patch = myPatches[patchI];
 
        if (patch.size() == 0)
        {
            continue;
        }
 
        os << "solid " << patch.name() << endl;
 
        for
        (
            label patchFaceI = 0;
            patchFaceI < patch.size();
            patchFaceI++
        )
        {
            const label faceI = faceMap[faceIndex++];
 
            const vector& n = faceNormals()[faceI];
 
            os  << "  facet normal "
                << n.x() << ' ' << n.y() << ' ' << n.z() << endl;
            os  << "    outer loop" << endl;
 
            const labelledTri& f = (*this)[faceI];
            const point& pa = points()[f[0]];
            const point& pb = points()[f[1]];
            const point& pc = points()[f[2]];
 
            os  << "       vertex "
                << pa.x() << ' ' << pa.y() << ' ' << pa.z() << endl;
            os  << "       vertex "
                << pb.x() << ' ' << pb.y() << ' ' << pb.z() << endl;
            os  << "       vertex "
                << pc.x() << ' ' << pc.y() << ' ' << pc.z() << endl;
            os
                << "    endloop" << endl;
            os
                << "  endfacet" << endl;
        }
 
        os << "endsolid " << patch.name() << endl;
    }
}
 
 
void triSurface::writeSTLBINARY(std::ostream& os) const
{
    // Write the STL header
    string header("Foam binary STL", STLheaderSize);
    os.write(header.c_str(), STLheaderSize);
 
    label nTris = size();
    os.write(reinterpret_cast<char*>(&nTris), sizeof(unsigned int));
 
    const vectorField& normals = faceNormals();
 
    forAll(*this, faceI)
    {
        const labelledTri& f = (*this)[faceI];
 
        // Convert vector into STL single precision
        STLpoint n(normals[faceI]);
        STLpoint pa(points()[f[0]]);
        STLpoint pb(points()[f[1]]);
        STLpoint pc(points()[f[2]]);
 
        STLtriangle stlTri(n, pa, pb, pc, f.region());
 
        stlTri.write(os);
    }
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// ************************************************************************* //