Area.h

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/* Copyright (C) 2002-2004, 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 _Area_h
#define _Area_h

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

#include "PhysicalQuantities/Length.h"

namespace Quantities {

/* Area dimension */
typedef BSUtilities::Rational<2> Area_LE;
typedef BSUtilities::Rational<0> Area_M;
typedef BSUtilities::Rational<0> Area_TI;
typedef BSUtilities::Rational<0> Area_E;
typedef BSUtilities::Rational<0> Area_TE;
typedef BSUtilities::Rational<0> Area_A;
typedef BSUtilities::Rational<0> Area_LU;
class AreaGroup
  {
    public:
      typedef TYPELIST_7(Area_LE, Area_M, Area_TI, Area_E,
                       Area_TE, Area_A, Area_LU) DimTL;
  };

  namespace AreaUnits {

/* declaration of Area unit base class */
typedef Units::Unit<AreaGroup> AreaUnit;

/* declaration of Area units */
class SquareMetreUnits;
class BarnUnit;
class AcreUnit;
class AreUnit;
class HectareUnit;

/* the SquareMetre and prefixed SquareMetres */

typedef TYPELIST_3(LengthUnits::Metre, LengthUnits::CentiMetre, 
                                    LengthUnits::MilliMetre) LengthList;

typedef Units::CompoundElement<AreaGroup, LengthList, 
                               BSUtilities::Rational<2> > LengthElement;
typedef TYPELIST_1(LengthElement) AreaCompositeList;
typedef 
       Units::Compound<AreaGroup, AreaCompositeList> AreaCompositeUnits;

typedef 
  Units::Composed<AreaCompositeUnits, TYPELIST_1(LengthUnits::Metre)> 
                                                            SquareMetre;

typedef Units::Composed<AreaCompositeUnits, 
                  TYPELIST_1(LengthUnits::MilliMetre)> SquareMilliMetre;

/* the Barn */

typedef Units::NonPrefixable<AreaGroup, BarnUnit> Barn;

/* the Acre */

typedef Units::NonPrefixable<AreaGroup, AcreUnit> Acre;

/* the Are */

typedef Units::NonPrefixable<AreaGroup, AreUnit> Are;

/* the Hectare */

typedef Units::NonPrefixable<AreaGroup, HectareUnit> Hectare;

typedef TYPELIST_6(SquareMetre, SquareMilliMetre,
                           Barn, Acre, Are, Hectare) AreaUnits;

  }

/* declaration of Area dimension */

typedef Dimensions::Dimension<AreaGroup> AreaDimension;

/* Area quantity */

typedef Quantity<AreaGroup, AreaUnits::AreaUnits,
                                 AreaUnits::SquareMetre> AreaQuantities;

typedef Variable<AreaQuantities> Area;
typedef Constant<AreaQuantities> AreaConstant;

typedef VariableVector<AreaQuantities> AreaVector;

}

#endif /* _Area_h */

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