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#ifndef QUADTREE_H
#define QUADTREE_H
#include "vector.h"
#include <boost/thread.hpp>
class Quadtree {
public:
struct UpdateThread {
Quadtree *tree;
float *buffer;
UpdateThread(Quadtree *t, float *b);
void operator()();
};
struct QuadNode {
Quadtree *tree;
QuadNode *parent;
QuadNode *children[4];
int elems;
float x, y, width, height;
int level;
float *vertex_array;
QuadNode(Quadtree *tree, QuadNode *parent, float x, float y, float width, float height, int level, bool leaf);
virtual ~QuadNode();
float distance(float px, float pz);
void fill();
void fix_cracks();
void subdivide(bool leaf = true);
void merge();
void draw();
void draw_grid();
float get_height(float px, float py);
Vector3 get_normal(int index);
};
float *heights;
float *thread_buffer;
size_t buf_size;
bool thread_done, thread_running;
boost::mutex vbo_lock;
boost::mutex node_lock;
int width, height, levels;
float init_time;
QuadNode *root;
unsigned int temp_vbo;
unsigned int vbo_object;
unsigned int nodes;
unsigned int vertices;
Quadtree(int width, int height, float *heightmap, int levels);
virtual ~Quadtree();
void update(float x, float z);
void fix_cracks();
void create_nodes(int levels);
unsigned int count_nodes();
void make_vbo();
void update_vbo();
QuadNode *find(float x, float y, int level = -1);
QuadNode *get_left(QuadNode *node);
QuadNode *get_right(QuadNode *node);
QuadNode *get_up(QuadNode *node);
QuadNode *get_down(QuadNode *node);
};
#endif
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