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CoordExpr.h

Go to the documentation of this file.

#ifndef COORDEXPR_H
#define COORDEXPR_H

#include "SundanceDefs.h"

#include "ExprBase.h"
#include "DenseSerialVector.h"


namespace Sundance
{

  using namespace TSF;
  using std::string;

  using std::ostream;

  /**
   * \ingroup UserLevelSymbolics
   * A function that varies linearly with one of the Cartesian coordinate
   * directions. You can use this to create arbitrary functions of position
   * using Expr operations.
   */

  class CoordExpr : public ExprBase
    {
    public:
      /** \name User-level methods */
      //@{
      /** Construct with a coordinate direction and a name for pretty-printing. */
      CoordExpr(int direction, const string& name);

      /** Construct with a coordinate direction */
      CoordExpr(int direction);
      //@}

      virtual ~CoordExpr(){;}

      /** \name Developer-only methods */
      //@{
      // evaluation

      /** average over the nodes of a cell */
      virtual ExprValue average(const Cell& cell) const ;

      /** */
      virtual void evaluate(const WorkSet& workSet,
                            const QuadratureFamily& quadFamily,
                            DenseSerialVector& result) const ;

      /** */
      virtual void evaluate(const AbstractFunctionSpace& targetSpace, const TSFArray<Cell>& cells,
                            const TSFArray<int>& cellIndices,
                            const TSFArray<int>& dofIndices,
                            const TSFArray<Point>& x,
                            DenseSerialVector& values) const ;


      // differentiation
      /** take derivative: first
       * derivative will be 1 if d=coordDirection, 0 otherwise. */
      virtual void derivative(const MultiIndex& d, Expr& result) const ;

      // ordering support
      /** */
      virtual bool operator==(const Expr& other) const ;
      /** */
      virtual bool operator<(const Expr& other) const ;
      /** */
      virtual int sortPriority() const {return COORDEXPR;}

      // RTTI
      /** identify self as a CoordExpr */
      virtual bool isCoordExpr() const {return true;}

      /** virtual copy ctor */
      virtual ExprBase* clone() const ;

      /** print */
      virtual void print(ostream& os, bool paren=false) const ;
      /** write to string */
      virtual string toString(bool paren=false) const ;
      /** write to XML form */
      virtual XMLObject toXML() const ;

      /** return name of coordinate */
      const string& name() const {return name_;}
      //@}
    private:
      int direction_;
      string name_;

    };


}
#endif

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Contact:

Kevin Long (krlong@ca.sandia.gov)


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