GMGPreconditioner.h

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#ifndef HEX_GMGPRECONDITIONER_H
#define HEX_GMGPRECONDITIONER_H

// --------------------------------------------------------------------------------- //

#include "NoPreconditioner.h"

// --------------------------------------------------------------------------------- //

class GMGPreconditioner : public NoPreconditioner
{
    public:
        
        // run-time selection mechanism
        preconditionerRunTimeSelectionDefinitions(GMGPreconditioner, "GMG")
        
        // constructor
        GMGPreconditioner
        (
            CommandLine  const & cmd,
            InputFile    const & inp,
            Parallel     const & par,
            AngularBasis const & ang,
            Bspline const & bspline_x_inner,
            Bspline const & bspline_x_full,
            Bspline const & bspline_y_inner,
            Bspline const & bspline_y_full
        );
        
        // sub-grid contructor
        GMGPreconditioner
        (
            CommandLine  const & cmd,
            InputFile    const & inp,
            Parallel     const & par,
            AngularBasis const & ang,
            Bspline const & bspline_x_inner,
            Bspline const & bspline_x_full,
            Bspline const & bspline_y_inner,
            Bspline const & bspline_y_full,
            int level
        );
        
        // destructor
        virtual ~GMGPreconditioner ();
        
        // preconditioner description
        virtual std::string description () const;
        
        // reuse parent definitions
        using NoPreconditioner::rhs;
        using NoPreconditioner::multiply;
        using NoPreconditioner::finish;
        
        // declare own definitions
        virtual void setup ();
        virtual void update (Real E);
        virtual void precondition (BlockArray<Complex> const & r, BlockArray<Complex> & z) const;
    
    private:
        
        int level_;
        
        Bspline const & bspline_inner_fine_;
        Bspline const & bspline_full_fine_;
        
        Bspline bspline_inner_coarse_;
        Bspline bspline_full_coarse_;
        
        RowMatrix<Complex> restrictor_inner_, restrictor_outer_;
        RowMatrix<Complex> prolongator_inner_, prolongator_outer_;
        
        cArrays D;
        
        PreconditionerBase * subgrid_;
};

// --------------------------------------------------------------------------------- //

#endif