text: #ifndef BIRD_HPP
  #define BIRD_HPP
  
  #include <SFML/Graphics.hpp>
  #include "NEFT/organism.hpp"
  #include "wall_manager.hpp"
  
  class Bird : public Organism, public sf::Transformable, public sf::Drawable
  {
  protected:
      sf::CircleShape m_shape;
      
      sf::Sprite m_sprite;
  
      sf::Vector2f m_linearVelocity;
      sf::Vector2f m_linearAcceleration;
      sf::Vector2f m_gravity;
  
      const float MASS = 1.f;
      const float SHAPE_RADIUS = 20.f;
      const sf::Color DEBUG_COLOR = sf::Color(255, 0, 0, 50);
      const sf::Color SPRITE_MODULATE = sf::Color(255, 255, 255, 170);
      const sf::Vector2f JUMP_FORCE = sf::Vector2f(0.f, -14.f);
  
      void applyPhysics();
      bool collide(
          const WallManager& wallManager, const sf::Vector2u& windowSize) const;
  
  public:
      Bird(const sf::Vector2u& windowSize, const sf::Texture& texture);
      ~Bird();
  
      sf::Vector2f getGravity() const;
      void setGravity(const sf::Vector2f& gravity);
  
      void applyImpulse(const sf::Vector2f& force);
      void jump();
      
      sf::CircleShape getShape() const;
  
      void reset(const sf::Vector2u& windowSize);
      void process(
          const WallManager& wallManager, const sf::Vector2u& windowSize);
      
  
      /* methods relative to abstract classes that this object inherit from */
      virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const;
      virtual Bird* copy() const;
  };
  
  #endif
  