Method getArea

annotation/Annotation.cpp:45–58

}

float Annotation::getArea() const {
  if (!_coordinates.empty()) {
    double  area = 0.;
    int j = _coordinates.size() - 1;
    for (int i = 0; i < _coordinates.size(); i++) {
      area += (_coordinates[j].getX() + _coordinates[i].getX())*(_coordinates[j].getY() - _coordinates[i].getY());
      j = i;
    }
    return std::abs(area*.5);
  }
  else{
    return 0.0;
  }
}

unsigned int Annotation::getNumberOfPoints() const {
  return _coordinates.size();