Force.h

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/* Copyright (C) 2002 - 2009, Bernd Speiser */

/* This file is part of Quantities.

PhysicalQuantities is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

PhysicalQuantities is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
  
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/

#ifndef _Force_h
#define _Force_h

// Quantity includes
#include "Quantity/Variable.h"
#include "Quantity/Constant.h"
#include "Quantity/QuantityCluster.h"

namespace quantity {
  namespace force {

class Class;

class Unit;

/* declaration of Force units */
class NewtonUnits;
class DyneUnit;
class KilogramForceUnit;
class AtomicUnit;

typedef unit::Prefixable<Unit, NewtonUnits> Newtons;

typedef unit::Prefixed<Newtons> Newton;

typedef unit::NonPrefixable<Unit, DyneUnit> Dyne;

typedef unit::NonPrefixable<Unit, KilogramForceUnit> KilogramForce;

typedef unit::NonPrefixable<Unit, AtomicUnit> Atomic;

typedef Loki::TL::Append<Newtons::Units,
            LOKI_TYPELIST_3(Dyne, KilogramForce, Atomic)>::Result Units;

/* declare some abbreviated time units */

typedef Newton N;
typedef Dyne dyn;

/* Force Quantity */

typedef Quantity<Class> Quantity;

class DerivedForce;

  } // end namespace force


  template<typename ST>
    struct Standard<force::Newton, ST>
    {
      static const ST ratio;
      static const bool exact;
    };

template<typename ST> const ST Standard<force::Newton, ST>::ratio = 1.0;

template<typename ST> const bool Standard<force::Newton, ST>::exact = true;


  template<typename ST>
    struct Standard<force::Dyne, ST>
    {
      static const ST ratio;
      static const bool exact;
    };

template<typename ST> const ST Standard<force::Dyne, ST>::ratio = 1.0e-5;

template<typename ST> const bool Standard<force::Dyne, ST>::exact = true;


  template<typename ST>
    struct Standard<force::KilogramForce, ST>
    {
      static const ST ratio;
      static const bool exact;
    };

template<typename ST> const ST Standard<force::KilogramForce, ST>::ratio = 9.80665;

template<typename ST> const bool Standard<force::KilogramForce, ST>::exact = true;


  template<typename ST>
    struct Standard<force::Atomic, ST>
    {
      static const ST ratio;
      static const bool exact;
    };

template<typename ST> const ST Standard<force::Atomic, ST>::ratio = 8.23873e-8;

template<typename ST> const bool Standard<force::Atomic, ST>::exact = false;

template<>
  struct QuantityTraits<force::Class>
  {
    typedef
      dimension::Dimension<BSUtilities::Rational<1>,
        BSUtilities::Rational<1>, BSUtilities::Rational<-2>,
          BSUtilities::Rational<0>, BSUtilities::Rational<0>,
            BSUtilities::Rational<0>, BSUtilities::Rational<0> > Dimension;
    typedef force::Unit UnitType;
    typedef force::Units UnitList;
    typedef force::Newton DefaultUnit;

    typedef force::DerivedForce DefaultDerivedQuantityType;

    static const std::string NameString;
    static const std::string SymbolString;

  };

// the derived quantity traits template for Newton force
template<>
  struct DerivedQuantityTraits<force::Class, force::DerivedForce>
  {
    static const bool OverwriteName = false;
    static const bool OverwriteSymbol = false;

    static const std::string NameString;
    static const std::string SymbolString;

  };

typedef Variable<force::Quantity> Force;

typedef Constant<force::Quantity> ForceConstant;

typedef QuantityVector<Variable, force::Quantity> ForceVector;
}

#endif /* _Force_h */

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