interpolationLookUpTable.H

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License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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    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::interpolationLookUpTable
 
Description
    A list of lists. Interpolates based on the first dimension.
    The values must be positive and monotonically increasing in each dimension
 
    Note:
      - Accessing an empty list results in an error.
      - Accessing a list with a single element always returns the same value.
 
SourceFiles
    interpolationLookUpTable.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef interpolationLookUpTable_H
#define interpolationLookUpTable_H
 
#include "List.H"
#include "ListOps.H"
#include "scalarField.H"
#include "HashTable.H"
#include "IOdictionary.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace radiationModels
{
namespace absorptionEmissionModels
{
 
/*---------------------------------------------------------------------------*\
                  Class interpolationLookUpTable Declaration
\*---------------------------------------------------------------------------*/
 
class interpolationLookUpTable
:
    public List<scalarField>
{
    // Private Data
 
        //- File name
        fileName fileName_;
 
        //- Table dimensions
        List<label> dim_;
 
        //- Min on each dimension
        List<scalar> min_;
 
        //- Deltas on each dimension
        List<scalar> delta_;
 
        //- Maximum on each dimension
        List<scalar> max_;
 
        //- Dictionary entries
        List<dictionary> entries_;
 
        //- Output dictionaries
        List<dictionary> output_;
 
        //- Input indices from the lookup table
        List<label> entryIndices_;
 
        //- Output indices from the lookup Table
        List<label> outputIndices_;
 
        //- Field names and indices
        HashTable<label> fieldIndices_;
 
        //- Output list containing input and interpolation values of outputs
        List<scalar> interpOutput_;
 
 
    // Private Member Functions
 
        //- Read the table of data from file
        void readTable(const word& instance, const objectRegistry&);
 
        //- Dimension table from dictionaries input and output
        void dimensionTable();
 
        //- Find table index by scalarList
        label index(const List<scalar>&, const bool lastDim=true) const;
 
        //- Find table index by scalar
        label index(const scalar) const;
 
        //- Check range of lookup value
        bool checkRange(const scalar, const label) const;
 
        //- Interpolate function returning a scalar
        scalar interpolate
        (
            const label lo,
            const label hi,
            const scalar lookUpValue,
            const label ofield,
            const label interfield
        ) const;
 
        // Check list is monotonically increasing
        void check() const;
 
        // find hi index, interpolate and populate interpOutput_
        void findHi(const label lo, const scalar retvals);
 
 
public:
 
    // Constructors
 
        //- Construct null
        interpolationLookUpTable();
 
        //- Construct given the name of the file containing the table of data
        interpolationLookUpTable
        (
            const fileName&,
            const word& instance,
            const objectRegistry&
        );
 
         //- Construct from dictionary
        interpolationLookUpTable(const dictionary&);
 
        //- Construct copy
        interpolationLookUpTable(const interpolationLookUpTable&);
 
 
    // Member Functions
 
        //- Return true if the field exists in the table
        bool found(const word& fieldName) const;
 
        //- Return the output list given a single input scalar
        const List<scalar>& lookUp(const scalar);
 
        //- Write lookup table to filename.
        void write
        (
            Ostream&,
            const fileName&,
            const word& instance,
            const objectRegistry&
        ) const;
 
 
    // Access
 
        //- Return the index of a field by name
        inline label findFieldIndex(const word& fieldName) const;
 
        //- Return const access to the output dictionaries
        inline const List<dictionary>& output() const;
 
        //- Return const access tp the dictionary entries
        inline const List<dictionary>& entries() const;
 
        //- Return const access to the list of min dimensions
        inline const List<scalar>& min() const;
 
        //- Return const access to the list of dimensions
        inline const List<label>& dim() const;
 
        //- Return const access to the deltas in each dimension
        inline const List<scalar>& delta() const;
 
        //- Return const access to the list of max dimensions
        inline const List<scalar>& max() const;
 
        //- Return const access to the table name
        inline word tableName() const;
 
 
     // Member Operators
 
        //- Return an element
        const scalarField& operator[](const label) const;
 
        //- Return an element
        scalarField& operator[](const label);
 
};
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace absorptionEmissionModels
} // End namespace radiationModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "interpolationLookUpTableI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //