#ifndef KDTREE_H

#define KDTREE_H

#include <vector>

#include <iostream>

#include <fstream>

#include "scene.h"

using namespace std;

class ShapeList: public vector<Shape*>

{

};

class Container

{

protected:

	BBox bbox;

public:

	ShapeList shapes;

	Container(): bbox(), shapes() {};

	virtual ~Container() {};

	virtual void addShape(Shape* aShape);

	//void addShapeNoExtend(Shape* aShape) { shapes.push_back(aShape); };

	virtual Shape *nearest_intersection(const Shape *origin_shape, const Ray &ray,

		float &nearest_distance);

	virtual void optimize() {};

};

class KdNode

{

	float split;

public:

	void setAxis(short aAxis) { axis = aAxis; };

	short getAxis() { return axis; };

	void setSplit(float aSplit) { split = aSplit; };

	float getSplit() { return split; };

	KdNode *getLeftChild() { return children; };

	KdNode *getRightChild() { return children+1; };

	void subdivide(BBox bbox, int depth);

};

class KdTree: public Container

{

	KdNode *root;

	bool built;

public:

	KdTree() : Container(), built(false) {};

	void addShape(Shape* aShape) { Container::addShape(aShape); built = false; };

	Shape *nearest_intersection(const Shape *origin_shape, const Ray &ray,

		float &nearest_distance);

	void optimize() { build(); };

	void build();

	void save(ostream &str, KdNode *node = NULL);

	void load(istream &str, KdNode *node = NULL);

};

#endif