blockMesh.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2018-2020 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
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Class
    Foam::blockMesh
 
Description
    A multi-block mesh generator
 
    Dictionary controls
    \table
        Property    | Description                           | Required | Default
        scale       | Point scaling                         | no  | 1.0
        vertices    |                                       | yes |
        blocks      |                                       | yes |
        edges       |                                       | no  |
        faces       |                                       | no  |
        boundary    | Boundary definition                   | no  |
        patches     | Alternate version for "boundary"      | no  |
        namedBlocks |                                       | no  |
        namedVertices |                                     | no  |
        mergeType   | Merging "points" or "topology"        | no  | topology
        checkFaceCorrespondence |                           | no  | true
        verbose     |                                       | no  | true
    \endtable
 
Note
    The vertices, cells and patches for filling the blocks are demand-driven.
 
SourceFiles
    blockMesh.C
    blockMeshCheck.C
    blockMeshCreate.C
    blockMeshMerge.C
    blockMeshTopology.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef blockMesh_H
#define blockMesh_H
 
#include "Enum.H"
#include "blockList.H"
#include "searchableSurfaces.H"
#include "polyMesh.H"
#include "IOdictionary.H"
#include "blockVertexList.H"
#include "blockEdgeList.H"
#include "blockFaceList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class blockMesh Declaration
\*---------------------------------------------------------------------------*/
 
class blockMesh
:
    public blockList
{
public:
 
    // Data Types
 
        //- The block merging strategy
        enum mergeStrategy
        {
            DEFAULT_MERGE,  
            MERGE_TOPOLOGY, 
            MERGE_POINTS    
        };
 
 
private:
 
    // Static Data
 
        //- Names corresponding to the mergeStrategy
        static const Enum<mergeStrategy> strategyNames_;
 
 
    // Private Data
 
        //- Reference to mesh dictionary
        const IOdictionary& meshDict_;
 
        //- Switch for verbose output
        bool verboseOutput;
 
        //- Switch checking face consistency (defaults to true)
        bool checkFaceCorrespondence_;
 
        //- Optional searchable geometry to project face-points to
        searchableSurfaces geometry_;
 
        //- The scaling factor to convert to metres
        scalar scaleFactor_;
 
        //- The list of block vertices
        blockVertexList blockVertices_;
 
        //- The list of block vertex positions
        pointField vertices_;
 
        //- The list of curved edges
        blockEdgeList edges_;
 
        //- The list of curved faces
        blockFaceList faces_;
 
        //- The blocks themselves (the topology) as a polyMesh
        autoPtr<polyMesh> topologyPtr_;
 
        //- The sum of all cells in each block
        label nPoints_;
 
        //- The sum of all cells in each block
        label nCells_;
 
        //- The point offset added to each block
        labelList blockOffsets_;
 
        //- The merge points information
        labelList mergeList_;
 
        mutable pointField points_;
 
        mutable cellShapeList cells_;
 
        mutable faceListList patches_;
 
 
    // Private Member Functions
 
        template<class Source>
        void checkPatchLabels
        (
            const Source& source,
            const word& patchName,
            const pointField& points,
            faceList& patchShapes
        ) const;
 
        void readPatches
        (
            const dictionary& meshDescription,
            faceListList& tmpBlocksPatches,
            wordList& patchNames,
            wordList& patchTypes,
            wordList& nbrPatchNames
        );
 
        void readBoundary
        (
            const dictionary& meshDescription,
            wordList& patchNames,
            faceListList& tmpBlocksPatches,
            PtrList<dictionary>& patchDicts
        );
 
        void createCellShapes(cellShapeList& tmpBlockCells);
 
        autoPtr<polyMesh> createTopology
        (
            const IOdictionary& dict,
            const word& regionName
        );
 
        void check(const polyMesh& bm, const dictionary& dict) const;
 
        //- Determine merge info and final number of cells/points
        //- based on point distances
        void calcGeometricalMerge();
 
        //- Determine merge info and final number of cells/points
        //- based on block topology
        void calcTopologicalMerge();
 
        faceList createPatchFaces(const polyPatch& patchTopologyFaces) const;
 
        void createPoints() const;
        void createCells() const;
        void createPatches() const;
 
 
        //- No copy construct
        blockMesh(const blockMesh&) = delete;
 
        //- No copy assignment
        void operator=(const blockMesh&) = delete;
 
 
public:
 
    //- Runtime type information
    ClassName("blockMesh");
 
 
    // Constructors
 
        //- Construct from IOdictionary for given region
        //  Default is topological merging.
        blockMesh
        (
            const IOdictionary& dict,
            const word& regionName,
            mergeStrategy strategy = mergeStrategy::DEFAULT_MERGE
        );
 
 
    //- Destructor
    ~blockMesh() = default;
 
 
    // Member Functions
 
        // Access
 
            //- Access to input dictionary
            const dictionary& meshDict() const
            {
                return meshDict_;
            }
 
            //- Optional searchable geometry to project face-points to
            const searchableSurfaces& geometry() const
            {
                return geometry_;
            }
 
            //- True if the blockMesh topology exists
            bool valid() const;
 
            //- Reference to point field defining the blockMesh
            //  these points have not been scaled by scaleFactor
            const pointField& vertices() const;
 
            //- Return the blockMesh topology as a polyMesh
            const polyMesh& topology() const;
 
            //- Return the curved edges
            const blockEdgeList& edges() const
            {
                return edges_;
            }
 
            //- Return the curved faces
            const blockFaceList& faces() const
            {
                return faces_;
            }
 
            //- The scaling factor used to convert to metres
            scalar scaleFactor() const;
 
            //- The points for the entire mesh
            //  these points have been scaled by scaleFactor
            const pointField& points() const;
 
            //- Return cell shapes list
            const cellShapeList& cells() const;
 
            //- Return the patch face lists
            const faceListList& patches() const;
 
            //- Get patch information from the topology mesh
            PtrList<dictionary> patchDicts() const;
 
            //- Return patch names
            wordList patchNames() const;
 
            //- Number of blocks with specified zones
            label numZonedBlocks() const;
 
 
        // Edit
 
            //- Enable/disable verbose information about the progress
            void verbose(const bool on=true);
 
 
        // Write
 
            //- Writes edges of blockMesh in OBJ format.
            void writeTopology(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //