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

#ifndef WB3SCENE_H
#define WB3SCENE_H

#include <camera.hpp>
#include "wb3TArray.h"
#include "wb3ArtifactSet.hpp"

class wb3Light;

typedef wb3TArray<wb3Light*> wb3LightArray;

// A scene is just an artifact container with 
//     (1) a background color
// and (2) a list of lights

class wb3Scene : public wb3ArtifactSet
{
public:
  wb3Scene(float BGColor[3] = 0);
  ~wb3Scene() {};

  void SetBackground(const Vec3f& color);
  const Vec3f& GetBackground() const;

  void SetCamera(Camera *cam);
  Camera *GetCamera() const;

  void AddLight(wb3Light *pLight);
  const wb3LightArray& GetLights() const;

  virtual void Shade(const wb3Scene* scene,
                     const wb3Artifact* from,
                     const wb3Artifact* hit,
                     const Ray3f& r, const Vec3f &isect, 
                     Vec3f& color, Vec3f& attenuation, int hits) const;


protected:
  Vec3f m_BGColor;
  wb3Artifact *m_pArtifact;
  Camera *m_pCam;
  wb3LightArray m_Lights;

  static wb3Material m_DummyMaterial;
};

//----------------------------------------------------------------------------
inline void wb3Scene::SetBackground(const Vec3f& color)
{
  m_BGColor = color;
}
//----------------------------------------------------------------------------
inline const Vec3f& wb3Scene::GetBackground() const
{
  return m_BGColor;
}
//----------------------------------------------------------------------------
inline void wb3Scene::SetCamera(Camera *pCam)
{
  if (m_pCam)
    delete m_pCam;
  m_pCam = pCam;
}
//----------------------------------------------------------------------------
inline Camera* wb3Scene::GetCamera() const
{
  return m_pCam;
}
//----------------------------------------------------------------------------
inline void wb3Scene::AddLight(wb3Light *pLight)
{
  m_Lights.Add(pLight);
}
//----------------------------------------------------------------------------
inline const wb3LightArray& wb3Scene::GetLights() const
{
  return m_Lights;
}
//----------------------------------------------------------------------------

#endif