#ifndef ENTITY_H
#define ENTITY_H
#include <vector>
#include <queue>
#include <map>
using std::vector;
using std::queue;
using std::pair;

#include "ray.h"
#include "ray_intersect.h"
#include "lin_alg.h"
#include "transform.h"
#include "color.h"

struct Entity;

struct EntityWrap
{
	bool operator < (EntityWrap e) const
		{
			if(E < e.E) return true;
			if(E > e.E) return false;
			return special < e.special;
		}
	Entity* E;
	int special;
};

struct EntityWrapBound
{
	Entity* E;
	int special;
	vector3d hi, lo;
};

class Entity
{
public:
	virtual ~Entity() {}
	virtual RayIntersect CalcRayIntersect(Ray ray,
										  int special=-1) = 0;
	virtual vector3d CalcNormal(Ray ray, RayIntersect& ri) = 0;
	virtual void PathCompress(const Transform&,
							  queue<pair<Entity*,Transform> >&,
							  vector<Entity*>&)=0;
	virtual void GridCollect(vector<EntityWrapBound>& vec)=0;
	virtual int IntersectionTest(Ray ray, int special=-1)=0;
	float kd, ks, ka, n;
	Color col;
};

#endif