/***************************************************************************
   File:        SimScene.h                                                            
   Created:     02/04/2002                                                            
   Author:      Maxim Garber                                                
                Computer Science Department                                 
                University of North Carolina - Chapel Hill                  
                garber@cs.unc.edu                                           
                                                                            
   Description: Simulation scene file.                                                            
                                                                            
----------------------------------------------------------------------------.
   Copyright 2001 Maxim Garber                                              
   UNC Motion Planning Research Group                                       
                                                                            
                                                                            
*****************************************************************************/
#include "PBMProjectile.h"
#include "PBMWall.h"
#include "mat33.hpp"
#include "PQP.h"
#include "stopwatch.hpp"
#include <list>

struct CollisionStats
{
  unsigned int numWallCollisionTests;
  unsigned int numWallCollisions;
  unsigned int numObjectCollisionTests;
  unsigned int numObjectCollisions;

  Stopwatch wallCollisionTimer;
  Stopwatch objectCollisionTimer;

};

class PBMSimScene
{
public:
  PBMSimScene();
  PBMSimScene(float width, float height);
  ~PBMSimScene();

  ///////////////////////////////////////////////////////////////////////////
  // Updating object configurations
  void Update(float timeStep);

  ///////////////////////////////////////////////////////////////////////////
  // Drawing the objects
  void Draw();

  ///////////////////////////////////////////////////////////////////////////
  // Adding Objects
  void AddProjectile(PBMProjectile* projectile){_projectiles.push_back(projectile);}
  void AddWall      (PBMWall      * wall      ){_walls.push_back(wall)            ;}

  ///////////////////////////////////////////////////////////////////////////
  // Collision
  void EnableCollision(bool value)   {_enableCollision=value;}
  void EnableStats    (bool value)   {_enableStats=value;    }
  bool GetEnableStats ()             {return _enableStats;   }
  CollisionStats* GetCollisionStats(){return &_stats;        }
  void ResetStats     ();

private: 
  // list of objects in simulation
  std::list<PBMProjectile*>  _projectiles;
  std::list<PBMWall*>        _walls;

  // flag to enable collision detection
  bool _enableCollision;
  CollisionStats _stats;
  bool _enableStats;
  
  // scene bounds 
  float _sceneWidth, _sceneHeight;
  
  void _ProcessWallCollisions();
  void _ProcessObjectCollisions();
};