text: #ifndef RT_SPHERE_H
  #define RT_SPHERE_H
  
  #include "rt/Object.h"
  
  namespace rt {
  
  	class Sphere : public Object
  	{
  	public:
  		Sphere( const glm::vec3& pos, float r, const Material& m, const Transform& t);
  
  	private:
  		glm::vec3   m_Center;
  		float       m_Radius;
  
  		// Object interface
  	public:
  		Hit closestHit(const Ray &ray) const;
  	};
  
  } // namespace rt
  
  #endif // RT_SPHERE_H
  