SundanceCoordinateSystem.hpp

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/* @HEADER@ */


#ifndef SUNDANCE_COORDINATESYSTEM_HPP
#define SUNDANCE_COORDINATESYSTEM_HPP

#include "SundanceExpr.hpp"
#include "SundanceCoordExpr.hpp"
#include "PlayaExceptions.hpp"
#include <cmath>


namespace Sundance
{
using Sundance::Expr;
using namespace Teuchos;

class CoordinateSystemBase : 
  public Playa::Handleable<CoordinateSystemBase>
{
public:
  /** */
  virtual ~CoordinateSystemBase(){}

  /** */
  virtual Expr jacobian() const = 0 ;

  /** */
  virtual bool supportsMeshDimension(int dim) const = 0 ;

  /** */
  virtual std::ostream& print(std::ostream& os) const = 0 ;

  /** */
  double pi() const {return 4.0*::atan(1.0);}
};


class CoordinateSystem : public Playa::Handle<CoordinateSystemBase>
{
public:
  /* boilerplate handle ctors */
  HANDLE_CTORS(CoordinateSystem, CoordinateSystemBase);

  /** */
  Expr jacobian() const {return ptr()->jacobian();}

  /** */
  bool supportsMeshDimension(int dim) const 
    {return ptr()->supportsMeshDimension(dim);}

};


class CartesianCoordinateSystem : public CoordinateSystemBase
{
public:
  /** */
  CartesianCoordinateSystem(){}

  /** */
  Expr jacobian() const {return Expr(1.0);}

  /** */
  bool supportsMeshDimension(int dim) const {return dim > 0;}

  /** */
  std::ostream& print(std::ostream& os) const 
    {
      os << "Cartesian";
      return os;
    };

  
  /** */
  virtual RCP<CoordinateSystemBase> getRcp() {return rcp(this);}
};


class MeridionalCylindricalCoordinateSystem : public CoordinateSystemBase
{
public:
  /** */
  MeridionalCylindricalCoordinateSystem()
    : r_(new CoordExpr(0)) {}

  /** */
  Expr jacobian() const {return pi()*r_;}

  /** */
  bool supportsMeshDimension(int dim) const {return dim > 0 && dim <= 2;}

  /** */
  std::ostream& print(std::ostream& os) const 
    {
      os << "Meridional Cylindrical";
      return os;
    };
  
  /** */
  virtual RCP<CoordinateSystemBase> getRcp() {return rcp(this);}

private:
  Expr r_;
};

class RadialSphericalCoordinateSystem : public CoordinateSystemBase
{
public:
  /** */
  RadialSphericalCoordinateSystem()
    : r_(new CoordExpr(0)) {}

  /** */
  Expr jacobian() const {return pi()*r_*r_;}

  /** */
  bool supportsMeshDimension(int dim) const {return dim == 1;}
  
  /** */
  std::ostream& print(std::ostream& os) const 
    {
      os << "Radial Spherical";
      return os;
    };



  
  /** */
  virtual RCP<CoordinateSystemBase> getRcp() {return rcp(this);}
private:
  Expr r_;
};


class CoordinateSystemBuilder
{
public:
  /** */
  static CoordinateSystem makeCoordinateSystem(const std::string& name);
};


inline std::ostream& operator<<(std::ostream& os, const CoordinateSystem& cs)
{
  return cs.ptr()->print(os);
}

}




#endif