isoSurfaceTopo.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2019 OpenFOAM Foundation
    Copyright (C) 2019-2021 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::isoSurfaceTopo
 
Description
    Marching tet iso surface algorithm with optional filtering to keep only
    points originating from mesh edges.
 
SourceFiles
    isoSurfaceTopo.C
    isoSurfaceTopoTemplates.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef isoSurfaceTopo_H
#define isoSurfaceTopo_H
 
#include "bitSet.H"
#include "edgeList.H"
#include "isoSurfaceBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class cellShape;
class polyMesh;
 
/*---------------------------------------------------------------------------*\
                       Class isoSurfaceTopo Declaration
\*---------------------------------------------------------------------------*/
 
class isoSurfaceTopo
:
    public isoSurfaceBase
{
    // Private Data
 
        //- Per point: originating mesh vertex/cell centre combination.
        //  Vertices less than nPoints are mesh vertices,
        //  duplicate vertices indicate a snapped point
        edgeList pointToVerts_;
 
 
    // Private Classes
 
        //- Handling, bookkeeping for tet cuts
        class tetCutAddressing
        {
            // Bookkeeping hashes used during construction
            EdgeMap<label> vertsToPointLookup_;
            Map<label> snapVertsLookup_;
 
            // Filter information for face diagonals
            DynamicList<label> pointToFace_;
            DynamicList<bool> pointFromDiag_;
 
            // Final output
            DynamicList<edge> pointToVerts_;
            DynamicList<label> cutPoints_;
 
            //- List of cut (decomposed) cell tets. Debug use only.
            DynamicList<cellShape> debugCutTets_;
 
            bool debugCutTetsOn_;
 
 
        public:
 
        // Constructors
 
            //- Construct with reserved sizes
            tetCutAddressing
            (
                const label nCutCells,
                const bool useSnap,
                const bool useDebugCuts = false
            );
 
 
        // Member Functions
 
            //- Effective number of faces
            label nFaces() const { return cutPoints_.size()/3; }
 
            DynamicList<label>& pointToFace() { return pointToFace_; }
            DynamicList<bool>& pointFromDiag() { return pointFromDiag_; }
 
            DynamicList<edge>& pointToVerts() { return pointToVerts_; }
            DynamicList<label>& cutPoints() { return cutPoints_; }
            DynamicList<cellShape>& debugCutTets() { return debugCutTets_; }
 
            //- Number of debug cut tets
            label nDebugTets() const { return debugCutTets_.size(); }
 
            //- Debugging cut tets active
            bool debugCutTetsOn() const { return debugCutTetsOn_; }
 
            void clearDebug();
            void clearDiagonal();
            void clearHashes();
 
            //- Generate single point on edge
            label generatePoint
            (
                label facei,          
                bool edgeIsDiagonal,  
 
                // 0: no snap, 1: snap first, 2: snap second
                const int snapEnd,
 
                const edge& vertices
            );
 
            //- Generate triangles from tet cut
            bool generatePoints
            (
                const label facei,
                const int tetCutIndex,  
                const tetCell& tetLabels,
                const FixedList<bool, 6>& edgeIsDiagonal
            );
        };
 
 
    // Private Member Functions
 
        //- Generate triangle points from cell
        void generateTriPoints
        (
            const label celli,
            const bool isTet,
            const labelList& tetBasePtIs,
 
            tetCutAddressing& tetCutAddr
        ) const;
 
 
        // Simplification
 
            static void triangulateOutside
            (
                const bool filterDiag,
                const primitivePatch& pp,
 
                const boolUList& pointFromDiag,
                const labelUList& pointToFace,
                const label cellID,
 
                DynamicList<face>& compactFaces,
                DynamicList<label>& compactCellIDs
            );
 
            static void removeInsidePoints
            (
                Mesh& s,                            // Modify inplace
                const bool filterDiag,
 
                // Inputs
                const boolUList& pointFromDiag,
                const labelUList& pointToFace,
                const labelUList& start,            // Per cell:starting tri
 
                // Outputs
                DynamicList<label>& compactCellIDs  // Per face the cellID
            );
 
 
protected:
 
    // Editing
 
        //- Subset the surface using the selected faces.
        //
        //  \param[in] include the faces to select
        void inplaceSubsetMesh(const bitSet& include);
 
 
    // Sampling
 
        //- Interpolates cellData and pointData fields
        template<class Type>
        tmp<Field<Type>> interpolateTemplate
        (
            const Field<Type>& cellData,
            const Field<Type>& pointData
        ) const;
 
public:
 
    //- Runtime type information
    TypeName("isoSurfaceTopo");
 
 
    // Constructors
 
        //- Construct from cell and point values
        //
        //  \param ignoreCells cells to ignore in the cellValues
        //
        //  Control parameters include
        //  - bounds optional bounding box for trimming
        //  - mergeTol fraction of mesh bounding box for merging points
        isoSurfaceTopo
        (
            const polyMesh& mesh,
            const scalarField& cellValues,
            const scalarField& pointValues,
            const scalar iso,
            const isoSurfaceParams& params = isoSurfaceParams(),
            const bitSet& ignoreCells = bitSet()
        );
 
 
    //- Destructor
    virtual ~isoSurfaceTopo() = default;
 
 
    // Member Functions
 
        //- Per point: originating mesh vertex/cell centre combination.
        //  Vertices less than nPoints are mesh vertices (encoding above),
        //  duplicate vertices indicate a snapped point
        const edgeList& pointToVerts() const noexcept
        {
            return pointToVerts_;
        }
 
 
    // Sampling
 
        declareIsoSurfaceInterpolateMethod(scalar);
        declareIsoSurfaceInterpolateMethod(vector);
        declareIsoSurfaceInterpolateMethod(sphericalTensor);
        declareIsoSurfaceInterpolateMethod(symmTensor);
        declareIsoSurfaceInterpolateMethod(tensor);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "isoSurfaceTopoTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //