StraightLineFrom2Points.ih

#include <cstdlib>

// IMPLEMENTATION of inline methods.

// ----------------------- Standard services ------------------------------

template <typename TPoint>
inline
DGtal::StraightLineFrom2Points<TPoint>::~StraightLineFrom2Points()
{
}

template <typename TPoint>
inline
DGtal::StraightLineFrom2Points<TPoint>::StraightLineFrom2Points()
{
}

template <typename TPoint>
inline
void
DGtal::StraightLineFrom2Points<TPoint>::init(
        const Point& aFirstPoint, 
        const Point& aSecondPoint)
{
  myP = aFirstPoint;
  myQ = aSecondPoint;
}


template <typename TPoint>
inline
DGtal::StraightLineFrom2Points<TPoint>::StraightLineFrom2Points(
        const Point& aFirstPoint, 
        const Point& aSecondPoint):
        myP(aFirstPoint),
        myQ(aSecondPoint)
{
}


template <typename TPoint>
inline
DGtal::StraightLineFrom2Points<TPoint>::StraightLineFrom2Points(
        const StraightLineFrom2Points & other):
        myP(other.myP),
        myQ(other.myQ)
{
}


template <typename TPoint>
inline
DGtal::StraightLineFrom2Points<TPoint>&
DGtal::StraightLineFrom2Points<TPoint>::operator=(
        const StraightLineFrom2Points & other)
{
  myP = other.myP;
  myQ = other.myQ;
  return *this;
}



template <typename TPoint>
inline
typename DGtal::StraightLineFrom2Points<TPoint>::Distance
DGtal::StraightLineFrom2Points<TPoint>::signedDistance(const Point& aP) const
{
  Vector pq = myQ - myP;
  Vector pr = aP - myP;
  //computation of det(pq, pr) 
  //(= twice the parallelogram area)
  return ((pq.at(0) * pr.at(1)) - (pq.at(1) * pr.at(0)));
}


// Interface - public :

template <typename TPoint>
inline
std::string
DGtal::StraightLineFrom2Points<TPoint>::className() const
{
  return "StraightLineFrom2Points";
}

template <typename TPoint>
inline
void
DGtal::StraightLineFrom2Points<TPoint>::selfDisplay ( std::ostream & out ) const
{
  out << "[StraightLineFrom2Points] passing through:\n";
  out << myP << myQ;
}

template <typename TPoint>
inline
bool
DGtal::StraightLineFrom2Points<TPoint>::isValid() const
{
    return true;
}