//----------------------------------------------------------------------------
// William Baxter III's Ray Tracer
//
//     Project for Comp 238, Raster Graphics
//     University of North Carolina at Chapel Hill
//     
// $Id:$
//----------------------------------------------------------------------------

#ifndef WB3LIGHT_H
#define WB3LIGHT_H

#include <vec3f.hpp>
#include "ray3f.hpp"

//----------------------------------------------------------------------------

class wb3Scene;
class wb3Artifact;

class wb3Light
{
public:

  wb3Light();
  wb3Light(const Vec3f& color);
  ~wb3Light() {};

  const Vec3f& GetColor() const;
  void SetColor(const Vec3f& color);
  void SetColor(float intensity);

  bool GetShadowing() const;
  void SetShadowing(bool doesShadows);

  virtual void Contribute(const wb3Scene *scene, const wb3Artifact *hit, 
                          const Ray3f& r, const Vec3f &isect, const Vec3f &N,
                          Vec3f& color) const = 0;

protected:
  Vec3f m_Color;
  bool m_bShadow;
};

//----------------------------------------------------------------------------
inline const Vec3f& wb3Light::GetColor() const
{
  return m_Color;
}
//----------------------------------------------------------------------------
inline void wb3Light::SetColor(const Vec3f& color)
{
  m_Color = color;
}
//----------------------------------------------------------------------------
inline void wb3Light::SetColor(float intensity)
{
  m_Color = Vec3f(intensity, intensity, intensity);
}
//----------------------------------------------------------------------------
inline bool wb3Light::GetShadowing() const
{
  return m_bShadow;
}
//----------------------------------------------------------------------------
inline void wb3Light::SetShadowing(bool doShadows)
{
  m_bShadow = doShadows;
}
//----------------------------------------------------------------------------
#endif