cosineTorsion.h

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// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//
 
#ifndef BALL_MOLMEC_PARAMETER_COSINETORSION_H
#define BALL_MOLMEC_PARAMETER_COSINETORSION_H

#ifndef BALL_FORMAT_PARAMETERSECTION_H
# include <BALL/FORMAT/parameterSection.h>
#endif

#ifndef BALL_MOLMEC_PARAMETER_ATOMTYPES_H
# include <BALL/MOLMEC/PARAMETER/atomTypes.h>
#endif

namespace BALL 
{
  class BALL_EXPORT CosineTorsion 
    : public ParameterSection
  {
    public:

    enum 
    {
      UNKNOWN
    };

    struct SingleValues
    {
      float phase;
      float V;
      float f;
      float n;

      SingleValues(const SingleValues& v)
        : phase(v.phase),
          V(v.V),
          f(v.f),
          n(v.n)
      {
      }
        
      SingleValues()
        : phase(0),
          V(0),
          f(0),
          n(0)
      {
      }

      bool operator == (const SingleValues& rhs) const
      {
        return ((phase == rhs.phase) && (V == rhs.V) 
                && (f == rhs.f) && (n == rhs.n));
      }
    };

    struct BALL_EXPORT Values 
    {
      Size  n;
      SingleValues*   values;

      Values()
        : n(0),
          values(0)
      {
      }
      
      Values(Size number)
        : n((unsigned char)number),
          values(new SingleValues[number])
      {
      }
      
      Values(const Values& v)
      {
        n = v.n;
        values = new SingleValues[n];
        for (Position i = 0; i < n; i++)
        {
          values[i].phase = v.values[i].phase;
          values[i].V = v.values[i].V;
          values[i].f = v.values[i].f;
          values[i].n = v.values[i].n;
        }
      }

      void set(const Values& v)
      {
        delete [] values;

        n = v.n;
        values = new SingleValues[n];
        for (Position i = 0; i < n; i++)
        {
          values[i] = v.values[i];
        }
      }

      ~Values()
      {
        delete [] values;
      }
        
      bool operator == (const Values& rhs) const
      {
        if (n != rhs.n) 
        {
          return false;
        }
        for (Position i = 0; i < n; ++i)
        {
          if (!(values[i] == rhs.values[i]))
          {
            return false;
          }
        }
        return true;
      }
      
      bool operator != (const Values& rhs) const
      {
        return ! operator == (rhs);
      }
    };

    struct BALL_EXPORT Data
    {
      Atom*   atom1;
      Atom*   atom2;
      Atom*   atom3;
      Atom*   atom4;

      Values  values;
    };

    struct BALL_EXPORT SingleData
    {
      Atom*     atom1;
      Atom*     atom2;
      Atom*     atom3;
      Atom*     atom4;

      SingleValues  values;
    };


    CosineTorsion();
    
    CosineTorsion(const CosineTorsion& cosine_torsion);

    virtual ~CosineTorsion() ;

    virtual void clear() ;

    

    virtual bool extractSection(ForceFieldParameters& parameters, const String& section_name);

    virtual bool extractSection(Parameters& parameters, const String& section_name);

    bool hasParameters(Atom::Type I, Atom::Type J, Atom::Type K, Atom::Type L) const;
    
    CosineTorsion::Values getParameters(Atom::Type I, Atom::Type J, Atom::Type K, Atom::Type L) const;
    
    bool assignParameters(CosineTorsion::Values& parameters, Atom::Type I, 
                          Atom::Type J, Atom::Type K, Atom::Type L) const;



    CosineTorsion& operator = (const CosineTorsion& cosine_torsion);
    


    bool operator == (const CosineTorsion& cosine_torsion) const;


    protected:

    Size                  number_of_atom_types_;

    vector<Values>        torsions_;
    
    HashMap<Size, Size>   torsion_hash_map_;
  };

} // namespace BALL

#endif // BALL_MOLMEC_PARAMETER_COSINETORSION_H

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