#include "SFML/Graphics.hpp"

class OvalShape : public sf::Shape {
	public:
		OvalShape( sf::Vector2f radius = sf::Vector2f( 0, 0 ) );

		void setPointCount( std::size_t );
		std::size_t getPointCount() const;
		sf::Vector2f getPoint( std::size_t ) const;
		void setRadius( sf::Vector2f );
		sf::Vector2f getRadius() const;
	private:
		sf::Vector2f radius_;
		sf::CircleShape circle_;
};

OvalShape::OvalShape( sf::Vector2f radius ){
	setRadius( radius );
}
void OvalShape::setPointCount( std::size_t count ){
	circle_.setPointCount( count );
	update();
}
std::size_t OvalShape::getPointCount() const{
	return circle_.getPointCount();
}
sf::Vector2f OvalShape::getPoint( std::size_t index ) const{
	const float circle_radius = circle_.getRadius();
	const sf::Vector2f circle_position( circle_.getPosition() );
	const sf::Vector2f circle_point( circle_.getPoint( index ) );
	sf::Vector2f circle_origin( sf::Vector2f( circle_position.x + circle_radius,
				circle_position.y + circle_radius ) );
	float oval_position_movement_y =
		circle_radius * ( radius_.y - radius_.x ) / radius_.x;
	sf::Vector2f oval_point;
	oval_point.x = circle_point.x;
	oval_point.y = ( circle_point.y - circle_origin.y ) * radius_.y / radius_.x
		+ circle_origin.y + oval_position_movement_y;
	return oval_point;
}
void OvalShape::setRadius( sf::Vector2f radius ){
	radius_ = radius;
	circle_.setRadius( radius.x );
	update();
}
sf::Vector2f OvalShape::getRadius() const{
	return radius_;
}