pt_source_const.h

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// -*- C++ -*-
/*! \file
 *  \brief Point source construction
 */
 
#ifndef __pt_source_const_h__
#define __pt_source_const_h__
 
#include "meas/sources/source_construction.h"
#include "io/xml_group_reader.h"
 
namespace Chroma
{
 
  //! Name and registration
  /*! @ingroup sources */
  namespace PointQuarkSourceConstEnv
  {
    bool registerAll();
 
    //! Return the name
    std::string getName();
  
    //! Point source parameters
    /*! @ingroup sources */
    struct Params
    {
      Params();
      Params(XMLReader& in, const std::string& path);
      void writeXML(XMLWriter& in, const std::string& path) const;
    
      GroupXML_t       quark_displacement;   /*!< displacement xml */
      GroupXML_t       link_smearing;        /*!< link smearing xml */
 
      int              j_decay;              /*!< decay direction */
      multi1d<int>     t_srce;               /*!< source location */
    };
 
 
    //! Point source construction
    /*! @ingroup sources
     *
     * Create a point propagator source
     */
    template<typename T>
    class SourceConst : public QuarkSourceConstruction<T>
    {
    public:
      //! Full constructor
      SourceConst(const Params& p) : params(p) {}
 
      //! Construct the source
      T operator()(const multi1d<LatticeColorMatrix>& u) const;
 
    private:
      //! Hide partial constructor
      SourceConst() {}
 
    private:
      Params  params;   /*!< source params */
    };
 
  }  // end namespace
 
 
  //! Reader
  /*! @ingroup sources */
  void read(XMLReader& xml, const std::string& path, PointQuarkSourceConstEnv::Params& param);
 
  //! Writer
  /*! @ingroup sources */
  void write(XMLWriter& xml, const std::string& path, const PointQuarkSourceConstEnv::Params& param);
 
}  // end namespace Chroma
 
 
#endif