63      _points.push_back(std::pair<double,double>(
x,
y));
 
 
   66    void add_point(
const std::vector<std::pair<double,double>>::iterator 
vit,
 
   67           const double &
x, 
const double &
y)
 
   69      _points.insert(
vit,std::pair<double,double>(
x,
y));
 
   72    std::ostream& print(std::ostream &out)
 const 
   74    out << 
"contour points: [";
 
   75    for (
size_t i=0;i<_points.size();i++)
 
   77        out << 
"[" << _points.at(i).first << 
"," << _points.at(i).second << 
"]";
 
   78        if (i!=_points.size()-1)
 
   85    std::vector<std::pair<double,double>> _points;