curve_div
curve_approximation_method_e approximation_method() const { return curve_div; }
return curve_div;
curve3() : m_approximation_method(curve_div) {}
m_approximation_method(curve_div)
curve4() : m_approximation_method(curve_div) {}
m_approximation_method(curve_div)
m_approximation_method(curve_div)