dbpp_FirstDerivative.h

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#pragma once
 
// numeric include
#include <valarray>
// SfxBase19 include
#include "include/Sfx_DefineTypes.h"
#include "include/Sfx_UniversalConstants.h"
 
namespace dbpp 
{
  class FirstDerivative 
  {
  public:
    enum  class eBCtype
    {
      periodic,   
      noncentered 
    };
  public:
    FirstDerivative(eBCtype aBcTyp) : m_bcType{ aBcTyp }, m_dx{1.} {}
    std::valarray<double> d1x( const std::valarray<double>& aArray, float64 aDx);
 
    void setBCtype() {}
    eBCtype getBCtype() {}
    float64 getDx() const { return m_dx; }
    short getDerivativeOrder() const { return 2; }
       
  private:
    eBCtype m_bcType; 
    float64 m_dx;    
  };
} // End of namespace