PlaneAngle.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 _PlaneAngle_h
#define _PlaneAngle_h

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

namespace quantity {
  namespace planeAngle {

class Class;

class Unit;

/* declaration of PlaneAngle units */
class RadianUnits;
class DegreeUnit;
class MinuteUnit;
class SecondUnit;
class GradeUnit;

typedef unit::Prefixable<Unit, RadianUnits> Radians;

typedef unit::Prefixed<Radians> Radian;
typedef unit::Prefixed<Radians, unit::Deci> DeciRadian;
typedef unit::Prefixed<Radians, unit::Milli> MilliRadian;
typedef unit::Prefixed<Radians, unit::Micro> MicroRadian;
typedef unit::Prefixed<Radians, unit::Nano> NanoRadian;
typedef unit::Prefixed<Radians, unit::Pico> PicoRadian;

typedef unit::NonPrefixable<Unit, DegreeUnit> Degree;

typedef unit::NonPrefixable<Unit, MinuteUnit> Minute;

typedef unit::NonPrefixable<Unit, SecondUnit> Second;

typedef unit::NonPrefixable<Unit, GradeUnit> Grade;

typedef Loki::TL::Append<Radians::Units,
          LOKI_TYPELIST_4(Degree, Minute, Second, Grade)>::Result Units;

/* PlaneAngle quantity */
typedef quantity::Quantity<Class> Quantity;
typedef quantity::Quantity<Class, int> IntQuantity;

class DerivedPlaneAngle;

} // end namespace planeAngle


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

template<typename ST> const ST Standard<planeAngle::Radians, ST>::ratio = 1.0;

template<typename ST> const bool Standard<planeAngle::Radians, ST>::exact = true;


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

template<typename ST> const ST Standard<planeAngle::Degree, ST>::ratio = (4. * std::atan (1.0))/180.;

template<typename ST> const bool Standard<planeAngle::Degree, ST>::exact = true;


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

template<typename ST> const ST Standard<planeAngle::Minute, ST>::ratio 
                                                           = (4. * std::atan (1.0))/10800.;

template<typename ST> const bool Standard<planeAngle::Minute, ST>::exact = true;


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

template<typename ST> const ST Standard<planeAngle::Second, ST>::ratio 
                                                           = (4. * std::atan (1.0))/648000.;

template<typename ST> const bool Standard<planeAngle::Second, ST>::exact = true;


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

template<typename ST> const ST Standard<planeAngle::Grade, ST>::ratio 
                                                           = (4. * std::atan (1.0))/200.;

template<typename ST> const bool Standard<planeAngle::Grade, ST>::exact = true;

template<>
  struct QuantityTraits<planeAngle::Class>
  {
    typedef
      dimension::Dimension<BSUtilities::Rational<0>,
        BSUtilities::Rational<0>, BSUtilities::Rational<0>,
          BSUtilities::Rational<0>, BSUtilities::Rational<0>,
            BSUtilities::Rational<0>, BSUtilities::Rational<0> > Dimension;
    typedef planeAngle::Unit UnitType;
    typedef planeAngle::Units UnitList;
    typedef planeAngle::Radian DefaultUnit;

    typedef planeAngle::DerivedPlaneAngle DefaultDerivedQuantityType;

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

  };

// the derived quantity traits template for PlaneAngle
template<>
  struct DerivedQuantityTraits<planeAngle::Class, planeAngle::DerivedPlaneAngle>
  {
    static const bool OverwriteName = false;
    static const bool OverwriteSymbol = false;

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

  };


#define PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(helper) template<class ST> struct helper<planeAngle::Class, ST> {static ST exec (const Quantity<planeAngle::Class, ST> &quantity) {return ST(std::sin (Reverse<planeAngle::Radian>::VAL (quantity.standard_value ())));}};

PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(sinHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(cosHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(tanHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(sinhHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(coshHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(tanhHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(asinHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(acosHelper)
PHYSICALQUANTITIES_PLANEANGLE_TRIGONOMETRY_HELPER(atanHelper)

typedef Variable<planeAngle::Quantity> PlaneAngle;

typedef Variable<planeAngle::IntQuantity> IntPlaneAngle;

typedef Variable<planeAngle::Quantity> DegreePlaneAngle;

typedef Constant<planeAngle::Quantity> PlaneAngleConstant;

typedef QuantityVector<Variable, planeAngle::Quantity> PlaneAngleVector;

  }

#endif /* _PlaneAngle_h */

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