directionInfo.H

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    Copyright (C) 2019-2020,2025 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
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    You should have received a copy of the GNU General Public License
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Class
    Foam::directionInfo
 
Description
    Holds direction in which to split cell (in fact a local coordinate axes).
    Information is a label and a direction.
 
    The direction is the normal
    direction to cut in. The label's meaning depends on whether the info
    is on a cell or on a face:
        - in cell: edge that is being cut. (determines for hex how cut is)
        - in face: local face point that is being cut or -1.
            -# (-1)  : cut is tangential to plane
            -# (>= 0): edge fp..fp+1 is cut
 
            (has to be facepoint, not vertex since vertex not valid across
             processors whereas f[0] should correspond to f[0] on other side)
 
    The rule is that if the label is set (-1 or higher) it is used
    (topological information only), otherwise the vector is used. This makes
    sure that we use topological information as much as possible and so a
    hex mesh is cut purely topologically. All other shapes are cut
    geometrically.
 
SourceFiles
    directionInfoI.H
    directionInfo.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef directionInfo_H
#define directionInfo_H
 
#include "point.H"
#include "labelList.H"
#include "tensor.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class polyPatch;
class polyMesh;
class primitiveMesh;
class edge;
class face;
class directionInfo;
 
Istream& operator>>(Istream&, directionInfo&);
Ostream& operator<<(Ostream&, const directionInfo&);
 
/*---------------------------------------------------------------------------*\
                           Class directionInfo Declaration
\*---------------------------------------------------------------------------*/
 
class directionInfo
{
    // Private Data
 
        //- The mesh edge or face point
        label index_;
 
        //- The local n axis
        vector n_;
 
 
    // Private Member Functions
 
        //- Find edge among edgeLabels that uses v0 and v1
        static label findEdge
        (
            const primitiveMesh& mesh,
            const labelList& edgeLabels,
            const label v1,
            const label v0
        );
 
        //- Return 'lowest' of a,b in face of size.
        static label lowest
        (
            const label size,
            const label a,
            const label b
        );
 
public:
 
    // Static Functions
 
        //- Given edge on hex cell find corresponding edge on face. Is either
        //  index in face or -1 (cut tangential to face). Public since is
        //  needed to fill in seed faces in meshWave.
        static label edgeToFaceIndex
        (
            const primitiveMesh& mesh,
            const label celli,
            const label facei,
            const label edgeI
        );
 
 
    // Constructors
 
        //- Default construct, index=-1, vector::zero
        inline directionInfo();
 
        //- Construct from components
        inline directionInfo
        (
            const label index,
            const vector& n
        );
 
 
    // Member Functions
 
        // Access
 
            label index() const
            {
                return index_;
            }
 
            const vector& n() const
            {
                return n_;
            }
 
 
        // Needed by FaceCellWave
 
            //- Changed or contains original (invalid) value
            template<class TrackingData>
            inline bool valid(TrackingData& td) const;
 
            //- Check for identical geometrical data (eg, cyclics checking)
            template<class TrackingData>
            inline bool sameGeometry
            (
                const polyMesh&,
                const directionInfo&,
                const scalar,
                TrackingData& td
            ) const;
 
            //- Convert any absolute coordinates into relative to (patch)face
            //  centre
            template<class TrackingData>
            inline void leaveDomain
            (
                const polyMesh&,
                const polyPatch&,
                const label patchFacei,
                const point& faceCentre,
                TrackingData& td
            );
 
            //- Reverse of leaveDomain
            template<class TrackingData>
            inline void enterDomain
            (
                const polyMesh&,
                const polyPatch&,
                const label patchFacei,
                const point& faceCentre,
                TrackingData& td
            );
 
            //- Apply rotation matrix to any coordinates
            template<class TrackingData>
            inline void transform
            (
                const polyMesh&,
                const tensor&,
                TrackingData& td
            );
 
            //- Influence of neighbouring face.
            template<class TrackingData>
            inline bool updateCell
            (
                const polyMesh&,
                const label thisCelli,
                const label neighbourFacei,
                const directionInfo& neighbourInfo,
                const scalar tol,
                TrackingData& td
            );
 
            //- Influence of neighbouring cell.
            template<class TrackingData>
            inline bool updateFace
            (
                const polyMesh&,
                const label thisFacei,
                const label neighbourCelli,
                const directionInfo& neighbourInfo,
                const scalar tol,
                TrackingData& td
            );
 
            //- Influence of different value on same face.
            template<class TrackingData>
            inline bool updateFace
            (
                const polyMesh&,
                const label thisFacei,
                const directionInfo& neighbourInfo,
                const scalar tol,
                TrackingData& td
            );
 
            //- Test for equality, with TrackingData
            template<class TrackingData>
            inline bool equal(const directionInfo&, TrackingData& td) const;
 
            //- Interpolate between two values (lerp). Returns true if
            //- causes changes. Not sure if needs to be specialised between
            //- face and cell and what index is needed...
            template<class TrackingData>
            inline bool interpolate
            (
                const polyMesh&,
                const point& pt,
                const label i0,
                const directionInfo& f0,
                const label i1,
                const directionInfo& f1,
                const scalar weight,
                const scalar tol,
                TrackingData& td
            );
 
 
    // Member Operators
 
        //- Test for equality
        inline bool operator==(const directionInfo&) const;
 
        //- Test for inequality
        inline bool operator!=(const directionInfo&) const;
 
 
    // IOstream Operators
 
        friend Ostream& operator<<(Ostream&, const directionInfo&);
        friend Istream& operator>>(Istream&, directionInfo&);
};
 
 
// * * * * * * * * * * * * * * * * * Traits  * * * * * * * * * * * * * * * * //
 
//- Contiguous data for directionInfo
template<> struct is_contiguous<directionInfo> : std::true_type {};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "directionInfoI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //