/*

 * Pyrit Ray Tracer

 * file: octree.h

 *

 * Radek Brich, 2006-2007

 */

#ifndef OCTREE_H

#define OCTREE_H

#include "container.h"

#include "vector.h"

#include "scene.h"

using namespace std;

class OctreeNode

{

	OctreeNode *children; // pointer to first of eight children

public:

	ShapeList *shapes;    // pointer to shape array, if this is leaf

	OctreeNode() : children(NULL) { shapes = new ShapeList(); };

	~OctreeNode();

	bool isLeaf() { return shapes != NULL; };

	OctreeNode *getChild(const int num) { return children+num; };

	void addShape(Shape* aShape) { shapes->push_back(aShape); };

	void subdivide(BBox bbox, int maxdepth);

};

class Octree: public Container

{

	OctreeNode *root;

	bool built;

	int max_depth;

public:

	Octree() : Container(), root(NULL), built(false), max_depth(10) {};

	~Octree() { if (root) delete root; };

	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, OctreeNode *node = NULL) {};

	void load(istream &str, OctreeNode *node = NULL) {};

	void setMaxDepth(int md) { max_depth = md; };

};

#endif