ensightCells.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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-------------------------------------------------------------------------------
    Copyright (C) 2016-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
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/>.
 
Class
    Foam::ensightCells
 
Description
    Sorting/classification of cells (3D) into corresponding ensight element
    types.
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_ensightCells_H
#define Foam_ensightCells_H
 
#include "ensightPart.H"
#include "FixedList.H"
#include "Map.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class bitSet;
class polyMesh;
template<class T> class InfoProxy;
 
/*---------------------------------------------------------------------------*\
                        Class ensightCells Declaration
\*---------------------------------------------------------------------------*/
 
class ensightCells
:
    public ensightPart
{
public:
 
    // Public Data
 
        //- Supported ensight 'Cell' element types
        //  Must be zero-based since they are also for internal bookkeeping.
        enum elemType
        {
            TETRA4 = 0, 
            PYRAMID5,   
            PENTA6,     
            HEXA8,      
            NFACED      
        };
 
        //- Number of 'Cell' element types (5)
        static constexpr int nTypes = 5;
 
        //- The ensight 'Cell' element type names
        static const char* elemNames[nTypes];
 
 
    // Static Functions
 
        //- The ensight element name for the specified 'Cell' type
        inline static const char* key(const elemType etype);
 
 
private:
 
    // Private Data
 
        //- Manifold cells detected
        bool manifold_;
 
        //- Begin/end offsets for address of each element type
        FixedList<label, nTypes+1> offsets_;
 
        //- List of global sizes for each element type.
        //  Used temporarily for local sizes when building the element lists.
        FixedList<label, nTypes> sizes_;
 
 
    // Private Member Functions
 
        //- Low-level internal addition routine
        //  \return insertion locaion
        inline label add(const elemType etype, label id);
 
        //- Use temporarily stored sizes to redimension the element lists
        void resizeAll();
 
        //- Classify cell types, set element lists for selection
        //  (implementation)
        template<class Addressing>
        void classifyImpl(const polyMesh& mesh, const Addressing& cellIds);
 
 
        label meshPointMapppings
        (
            const polyMesh& mesh,
            labelList& pointToGlobal,  // Can also be labelList::null()
            labelList& uniqueMeshPointLabels,
            bool parallel
        ) const;
 
 
        //- Write cell connectivity for polyhedral cells
        static void writePolysConnectivity
        (
            ensightGeoFile& os,
            const polyMesh& mesh,
            const ensightCells& part,
            const labelList& pointToGlobal,
            bool parallel
        );
 
        //- Write cell connectivity for specified (non-poly) type
        static void writeShapeConnectivity
        (
            ensightGeoFile& os,
            const polyMesh& mesh,
            const ensightCells::elemType etype,
            const ensightCells& part,
            const labelList& pointToGlobal,
            bool parallel
        );
 
 
public:
 
    //- Declare type-name, virtual type (with debug switch)
    TypeName("ensightCells");
 
 
    // Constructors
 
        //- Default construct, with part index 0
        ensightCells();
 
        //- Default construct, with description/partName
        explicit ensightCells(const string& description);
 
 
    //- Destructor
    virtual ~ensightCells() = default;
 
 
    // Member Functions
 
    // Access
 
        //- Manifold mesh cells detected? Globally consistent quantity.
        inline bool manifold() const noexcept;
 
        //- Processor-local size of all elements.
        using ensightPart::size;
 
        //- Processor-local size of the specified element type.
        inline label size(const elemType etype) const;
 
        //- Processor-local offset/size of element type.
        inline labelRange range(const elemType etype) const;
 
        //- The global size of all element types.
        //  This value is only meaningful after a reduce operation.
        label total() const;
 
        //- The global size of the specified element type.
        //  This value is only meaningful after a reduce operation.
        inline label total(const elemType etype) const;
 
        //- The global sizes for each element type.
        //  This value is only meaningful after a reduce operation.
        inline const FixedList<label, nTypes>& totals() const;
 
        //- Processor-local sizes per element type.
        FixedList<label, nTypes> sizes() const;
 
        //- Processor-local cell ids of all elements
        inline const labelList& cellIds() const;
 
        //- Processor-local cell ids of the specified element type
        inline const labelUList cellIds(const elemType etype) const;
 
 
    // Addressing
 
        //- Mesh point map.
        //  Map mesh point index to local (compact) point index
        Map<label> meshPointMap(const polyMesh& mesh) const;
 
 
    // Edit
 
        //- Classify cell types and set the element lists.
        void classify(const polyMesh& mesh);
 
        //- Classify cell types and set element lists,
        //- using a subgroup of cells (eg, from a cellZone etc).
        void classify(const polyMesh& mesh, const labelUList& cellIds);
 
        //- Classify cell types and set element lists,
        //- using a subgroup of cells
        void classify(const polyMesh& mesh, const bitSet& selection);
 
 
        //- Clear any demand-driven data
        void clearOut();
 
        //- Set addressable sizes to zero, free up addressing memory.
        void clear();
 
        //- Sum element counts across all processes.
        void reduce();
 
        //- Sort element lists numerically.
        void sort();
 
 
    // Advanced (use with caution)
 
        //- Increase cell ids by specified offset value
        //  Eg, to change zone local Ids to global Ids
        inline void incrCellIds(const label off);
 
        //- Decrease face ids by specified offset value
        //  Eg, to change global Ids to zone local Ids
        inline void decrCellIds(const label off);
 
 
 
    // Output
 
        //- Return info proxy
        InfoProxy<ensightCells> info() const { return *this; }
 
 
        //- Globally unique mesh points. Required when writing point fields.
        label uniqueMeshPoints
        (
            const polyMesh& mesh,
            labelList& uniqueMeshPointLabels,
            bool parallel
        ) const;
 
 
        //- Write information about the object as a dictionary,
        //- optionally write all element addresses
        virtual void writeDict(Ostream& os, const bool full=false) const;
 
        //- Write geometry, using a mesh reference (serial only)
        virtual void write
        (
            ensightGeoFile& os,
            const polyMesh& mesh,
            bool parallel
        ) const;
};
 
 
template<>
Ostream& operator<<(Ostream&, const InfoProxy<ensightCells>&);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "ensightCellsI.H"
 
#endif
 
// ************************************************************************* //