symop.h

//C Copyright (C) 2000-2006 Kevin Cowtan and University of York
//L
//L  This library is free software and is distributed under the terms
//L  and conditions of version 2.1 of the GNU Lesser General Public
//L  Licence (LGPL) with the following additional clause:
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//L     not covered by this licence.)'
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//L  Note that this clause grants an additional right and does not impose
//L  any additional restriction, and so does not affect compatibility
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//L  other terms, please contact the maintainer.
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//L  You can redistribute it and/or modify the library under the terms of
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//L  Lesser General Public License for more details.
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#ifndef CLIPPER_SYMOP
#define CLIPPER_SYMOP


#include "clipper_types.h"


namespace clipper
{
  // forward definitions
  class Cell;
  class Grid;
  class RTop_orth;



  class RTop_frac : public RTop<>
  {
  public:
    inline RTop_frac() {}
    inline explicit RTop_frac( const RTop<>& o ) : RTop<>( o ) {}
    inline explicit RTop_frac( const Mat33<>& r ) : RTop<>( r ) {}
    explicit RTop_frac( const String& strop );
    inline RTop_frac( const Mat33<>& r, const Vec3<>& t ) : RTop<>( r, t ) {}
    RTop_orth rtop_orth( const Cell& cell ) const;
    RTop_frac inverse() const;
    static RTop_frac identity();
    static RTop_frac null();
  };



  class Symop : public RTop_frac
  {
  public:
    inline Symop() {}
    explicit Symop( const RTop<>& rt );
    explicit Symop( const ftype mat[4][4] );
    String format() const;
  };



  class Isymop : public RTop<int>
  {
  public:
    inline Isymop() {}
    inline explicit Isymop( const RTop<int>& rt ) : RTop<int>(rt) {}
    Isymop( const Symop& symop, const Grid& grid );
  };



  class Symop_code
  {
  public:
    inline Symop_code() {}
    inline explicit Symop_code( const int& code ) : code_(code) {}
    explicit Symop_code( const Symop& op );
    explicit Symop_code( const Isymop& op );
    void init( const Isymop& op );
    Symop_code code_rot() const;  
    Symop_code code_trn() const;  
    Symop symop() const;          
    Isymop isymop() const;        
    static Symop_code identity() { return Symop_code(0); } 

    inline operator int() const { return code_; }
  private:
    int code_;
  };


} // namespace clipper

#endif