pointMVCWeight.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::pointMVCWeight
 
Description
    Container to calculate weights for interpolating directly from vertices
    of cell using Mean Value Coordinates. Based on VTK's
    vtkMeanValueCoordinatesInterpolator.
 
    Reference:
    \verbatim
        Langer, T., Belyaev, A., & Seidel, H. P. (2006, June).
        Spherical barycentric coordinates.
        In Symposium on Geometry Processing (pp. 81-88).
    \endverbatim
 
SourceFiles
    pointMVCWeightI.H
    pointMVCWeight.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef pointMVCWeight_H
#define pointMVCWeight_H
 
#include "point.H"
#include "volFieldsFwd.H"
#include "pointFieldsFwd.H"
#include "scalarField.H"
#include "vectorField.H"
#include "Map.H"
#include "DynamicList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class face;
class polyMesh;
class pointMesh;
 
/*---------------------------------------------------------------------------*\
                       Class pointMVCWeight Declaration
\*---------------------------------------------------------------------------*/
 
class pointMVCWeight
{
protected:
 
    // Protected data
 
        //- Cell index
        const label cellIndex_;
 
        //- Weights applied to cell vertices
        scalarField weights_;
 
 
    // Protected Member Functions
 
        //- Calculate weights from single face's vertices only
        void calcWeights
        (
            const Map<label>& toLocal,
            const face& f,
            const DynamicList<point>& u,
            const scalarField& dist,
            scalarField& weights
        ) const;
 
        //- Calculate weights from all cell's vertices
        void calcWeights
        (
            const polyMesh& mesh,
            const labelList& toGlobal,
            const Map<label>& toLocal,
            const vector& position,
            const vectorField& uVec,
            const scalarField& dist,
            scalarField& weights
        ) const;
 
 
public:
 
    //- Type information
    ClassName("pointMVCWeight");
 
 
    // Static Member Data
 
        //- Tolerance used in calculating barycentric co-ordinates
        static scalar tol;
 
 
    // Constructors
 
        //- Construct from components
        pointMVCWeight
        (
            const polyMesh& mesh,
            const vector& position,
            const label celli,
            const label facei = -1
        );
 
 
    // Member Functions
 
        //- Cell index
        inline label cell() const
        {
            return cellIndex_;
        }
 
        //- Interpolation weights (in order of cellPoints)
        inline const scalarField& weights() const
        {
            return weights_;
        }
 
        //- Interpolate field
        template<class Type>
        inline Type interpolate
        (
            const PointField<Type>& psip
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "pointMVCWeightI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //