disp_colvec_map.h

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// -*- C++ -*-
/*! \file
 * \brief Holds displaced color vectors
 */
 
#ifndef __disp_colvec_map_h__
#define __disp_colvec_map_h__
 
#include "chromabase.h"
#include "util/ferm/subset_ev_pair.h"
#include "qdp_map_obj.h"
#include <map>
 
namespace Chroma 
{ 
  /*!
   * \ingroup smear
   *
   * @{
   */
  //----------------------------------------------------------------------------
  //! The key for displaced color vectors
  struct KeyDispColorVector_t
  {
    int  colvec;                  /*!< Colorstd::vector index */
    multi1d<int> displacement;    /*!< Orig plus/minus 1-based directional displacements */
  };
 
 
  //! Support for the keys of smeared and displaced color vectors
  bool operator<(const KeyDispColorVector_t& a, const KeyDispColorVector_t& b);
 
 
  //! The value of the std::map
  struct ValDispColorVector_t
  {
    LatticeColorVector vec;
  };
 
 
  //----------------------------------------------------------------------------
  //! The displaced objects
  class DispColorVectorMap
  {
  public:
    //! Constructor for displaced std::map 
    DispColorVectorMap(bool use_derivP, 
                       int disp_length,
                       const multi1d<LatticeColorMatrix>& u_smr,
                       const QDP::MapObject<int,EVPair<LatticeColorVector> >& eigen_source);
 
    //! Destructor
    ~DispColorVectorMap() {}
 
    //! Accessor
    const LatticeColorVector getDispVector(const KeyDispColorVector_t& key);
 
  protected:
    //! Displace an object
    const LatticeColorVector& displaceObject(const KeyDispColorVector_t& key);
                        
  private:
    //! Lattice color vectors
    const QDP::MapObject<int,EVPair<LatticeColorVector> >& eigen_source;
 
    //! Gauge field 
    const multi1d<LatticeColorMatrix>& u;
                        
    //! Displacements or derivatives?
    int use_derivP;
                        
    //! Displacement length
    int displacement_length;
                        
    //! Maps of displaced color vectors 
    std::map<KeyDispColorVector_t, ValDispColorVector_t> disp_src_map;
  };
 
  /*! @} */  // end of group smear
 
} // namespace Chroma
 
#endif