#ifndef SCENE_H
#define SCENE_H

#include "Object3D.h"

class Light
{
public:

  Light();
  Light(real redIntensity, real greenIntensity, real blueIntensity);
  Light(Vector3DW position, real redIntensity, real greenIntensity, real blueIntensity);

  Vector3DW getPosition();
  void setPosition(Vector3DW position);

  real getRedIntensity();
  real getGreenIntensity();
  real getBlueIntensity();

  void setRedIntensity(real redIntensity);
  void setGreenIntensity(real greenIntensity);
  void setBlueIntensity(real blueIntensity);
  void setIntensity(real redIntensity, real greenIntensity, real blueIntensity);

protected:
  Vector3DW position_;
  real redIntensity_;
  real greenIntensity_;
  real blueIntensity_;
};

class Scene
{
public:

  Scene(Color backColor, Light ambientLight);

  Color getBackColor();
  void setBackColor(Color backColor);

  Light getAmbientLight();
  void setAmbientLight(Light ambientLight);

  void clear();
  void addObject(Object3D* obj);
  void addLight(Light* light);

  Color rayTrace(Vector3DW rOrigin, Vector3DW rDirection, bool& hitObject, int maxReflections);
  void drawOpenGL();

protected:
  vector<Object3D*> objects_;
  vector<Light*> lights_;
  Color backColor_;
  Light ambientLight_;
};

class Camera
{
public:

  Camera(Scene* scene, Vector3DW eye, Vector3DW at, Vector3DW up, real fovy, real nearp, real farp);

  Vector3DW getEye();
  Vector3DW getAt();
  Vector3DW getUp();

  void setEye(Vector3DW eye);
  void setAt(Vector3DW at);
  void setUp(Vector3DW up);

  void rayTrace(unsigned char* data, int width, int height);
  void zBuffer(unsigned char* data, int width, int height);

protected:

  Scene* scene_;

  Vector3DW eye_;
  Vector3DW at_;
  Vector3DW up_;

  real fovy_;
  real nearp_;
  real farp_;
};

class StereoscopicCamera
{
public:

  StereoscopicCamera(Scene* scene, Vector3DW midEye, real distEyes, Vector3DW at, Vector3DW up, real fovy, real nearp, real farp);
  ~StereoscopicCamera();

  Vector3DW getMidEye();
  real getDistEyes();
  Vector3DW getAt();
  Vector3DW getUp();

  void setMidEye(Vector3DW eye);
  void setDistEyes(real distEyes);
  void setAt(Vector3DW at);
  void setUp(Vector3DW up);
  void setColorFactors(real redFactor, real greenFactor, real blueFactor);

  void rayTrace(unsigned char* data, int width, int height);

protected:

  Scene* scene_;

  Vector3DW midEye_;
  real distEyes_;
  Vector3DW at_;
  Vector3DW up_;

  real fovy_;
  real nearp_;
  real farp_;

  real redFactor_;
  real greenFactor_;
  real blueFactor_;

  Camera* leftCamera_;
  Camera* rightCamera_;

private:

  void deleteCameras();
  void setCameras();
};

#endif