ParametricShapeTangentFunctor.h

#pragma once

#if defined(ParametricShapeTangentFunctor_RECURSES)
#error Recursive header files inclusion detected in ParametricShapeTangentFunctor.h
#else // defined(ParametricShapeTangentFunctor_RECURSES)

#define ParametricShapeTangentFunctor_RECURSES

#if !defined ParametricShapeTangentFunctor_h

#define ParametricShapeTangentFunctor_h

// Inclusions
#include <iostream>
#include "DGtal/base/Common.h"

namespace DGtal
{

  // template class ParametricShapeTangentFunctor
  template <typename TParametricShape>
  class ParametricShapeTangentFunctor
  {
    
    // ----------------------- Standard services ------------------------------
  public:

    typedef TParametricShape ParametricShape;

    typedef typename TParametricShape::RealPoint RealPoint;

    typedef typename TParametricShape::RealPoint Quantity;

    ParametricShapeTangentFunctor(){}


    ParametricShapeTangentFunctor(ParametricShape *aShape): myShape(aShape) {};
    
    
    ~ParametricShapeTangentFunctor(){}

    // ----------------------- Interface --------------------------------------
  public:

    ParametricShapeTangentFunctor & operator= ( const ParametricShapeTangentFunctor & other )
    {
      myShape = other.myShape;
      return *this;
    }

   
    Quantity operator()(const RealPoint &aPoint)
    {
      ASSERT(myShape);

      double t = myShape->parameter( aPoint );   
      return  myShape->tangent( t );
    }
    

    // ------------------------- Private Datas --------------------------------
  private:
    
    ParametricShape *myShape;
    
    // ------------------------- Internals ------------------------------------
  private:
    
  }; // end of class ParametricShapeTangentFunctor
  
} // namespace DGtal

                                                                        //

#endif // !defined ParametricShapeTangentFunctor_h

#undef ParametricShapeTangentFunctor_RECURSES
#endif // else defined(ParametricShapeTangentFunctor_RECURSES)