foamVtkGenericPatchWriter.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2018-2021 OpenCFD Ltd.
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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.
 
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    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/>.
 
Class
    Foam::vtk::GenericPatchWriter
 
Description
    Write concrete PrimitivePatch faces/points (optionally with fields)
    as a vtp file or a legacy vtk file.
    The patch type is limited to representations of polygon faces
    and 3D points and must support the following methods:
 
    - localPoints()
    - localFaces()
    .
 
    The file output states are managed by the Foam::vtk::fileWriter class.
    FieldData (eg, TimeValue) must appear before any geometry pieces.
 
Note
    Parallel output is combined into a single Piece without point merging,
    which is similar to using multi-piece data sets, but allows more
    convenient creation as a streaming process.
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_vtk_GenericPatchWriter_H
#define Foam_vtk_GenericPatchWriter_H
 
#include "foamVtkPolyWriter.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace vtk
{
 
/*---------------------------------------------------------------------------*\
                   Class vtk::GenericPatchWriter Declaration
\*---------------------------------------------------------------------------*/
 
template<class PatchType>
class GenericPatchWriter
:
    public vtk::polyWriter
{
    // Private Member Data
 
        //- Reference to faces/points as a patch
        const PatchType& pp_;
 
 
    // Private Member Functions
 
        //- No copy construct
        GenericPatchWriter(const GenericPatchWriter<PatchType>&) = delete;
 
        //- No copy assignment
        void operator=(const GenericPatchWriter<PatchType>&) = delete;
 
 
public:
 
    // Constructors
 
        //- Construct from patch (default output INLINE_BASE64)
        explicit GenericPatchWriter
        (
            const PatchType& pp,
            const vtk::outputOptions opts = vtk::formatType::INLINE_BASE64
        )
        :
            vtk::polyWriter(opts),
            pp_(pp)
        {}
 
        //- Construct from components (default output INLINE_BASE64),
        //- and open the file for writing.
        //  The file name is with/without an extension.
        GenericPatchWriter
        (
            const PatchType& pp,
            const fileName& file,
            bool parallel = Pstream::parRun()
        )
        :
            vtk::polyWriter(file, parallel),
            pp_(pp)
        {}
 
        //- Construct from components and open the file for writing.
        //  The file name is with/without an extension.
        GenericPatchWriter
        (
            const PatchType& pp,
            const vtk::outputOptions opts,
            const fileName& file,
            bool parallel = Pstream::parRun()
        )
        :
            vtk::polyWriter(opts, file, parallel),
            pp_(pp)
        {}
 
 
    //- Destructor
    virtual ~GenericPatchWriter() = default;
 
 
    // Member Functions
 
        //- Reference to the originating face/points patch
        const PatchType& patch() const noexcept
        {
            return pp_;
        }
 
        //- Write file header (non-collective)
        //  \note Expected calling states: (OPENED).
        virtual bool beginFile(std::string title = "surface")
        {
            return vtk::polyWriter::beginFile(title);
        }
 
        //- Write patch topology
        //  Also writes the file header if not previously written.
        //  \note Must be called prior to writing CellData or PointData
        virtual bool writeGeometry()
        {
            return writePolyGeometry(pp_.localPoints(), pp_.localFaces());
        }
 
 
    // Write Fields
 
        //- Write processor ids for each poly as CellData
        bool writeProcIDs()
        {
            return vtk::polyWriter::writeProcIDs(nLocalPolys_);
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace vtk
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //