/*---------------------------------------------------------------------------*\
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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
    (at your option) any later version.

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    You should have received a copy of the GNU General Public License
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Class
    Foam::coneDirectionLagrangianVectorFieldSource

Description
    Mix-in for source conditions that provides a random injection direction
    between two cone angles

SourceFiles
    coneDirectionLagrangianVectorFieldSource.C

\*---------------------------------------------------------------------------*/

#ifndef coneDirectionLagrangianVectorFieldSource_H
#define coneDirectionLagrangianVectorFieldSource_H

#include "LagrangianInjection.H"
#include "Function1.H"
#include "restartableRandomGenerator.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

class LagrangianFieldSourceBase;

/*---------------------------------------------------------------------------*\
            Class coneDirectionLagrangianVectorFieldSource Declaration
\*---------------------------------------------------------------------------*/

class coneDirectionLagrangianVectorFieldSource
{
private:

    // Private Data

        //- Reference to the field source
        const LagrangianFieldSourceBase& field_;

        //- Inner half-cone angle
        const autoPtr<Function1<scalar>> thetaInner_;

        //- Outer half-cone angle
        const autoPtr<Function1<scalar>> thetaOuter_;

        //- A random number generator
        mutable restartableRandomGenerator rndGen_;

        //- The time index
        mutable label timeIndex_;


public:

    // Constructors

        //- Construct from a dictionary
        coneDirectionLagrangianVectorFieldSource
        (
            const LagrangianFieldSourceBase&,
            const dictionary& dict
        );

        //- Copy constructor
        coneDirectionLagrangianVectorFieldSource
        (
            const coneDirectionLagrangianVectorFieldSource&,
            const LagrangianFieldSourceBase&
        );


    //- Destructor
    ~coneDirectionLagrangianVectorFieldSource();


    // Member Functions

        //- Return the value for an instantaneous injection
        tmp<LagrangianSubVectorField> direction
        (
            const LagrangianSubVectorField& axis
        ) const;

        //- Write
        void write(Ostream&) const;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //