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#ifndef LOD_H 
#define LOD_H 
 
#include  
#include  
#include  
 
#define DISTANCE(v1, v2) sqrt((v1[0] - v2[0]) * (v1[0] - v2[0]) + \ 
                              (v1[2] - v2[2]) * (v1[2] - v2[2])) 
 
#define MAP 256 
#define QUAD_MAP (MAP + 1) 
 
#define IX_QT(x, z) (((x)%QUAD_MAP) + (((z)%QUAD_MAP) * QUAD_MAP)) 
 
#define EDGE_POINT 0 
#define NODE_POINT 1 
#define UNKNOWN    2 
 
#define NORTH   0 
#define WEST    1 
#define SOUTH   2 
#define EAST    3 
#define NW      4 
#define NE      5 
#define SW      6 
#define SE      7 
#define NORTH_L 8 
#define NORTH_R 9 
#define WEST_T  10 
#define WEST_B  11 
#define SOUTH_L 12 
#define SOUTH_R 13 
#define EAST_T  14 
#define EAST_B  15 
 
void reset_quad_tree(void); 
void draw(int x, int z, int width, int direction); 
void setup_quadtree(int x, int y, int width); 
 
extern int quadtree[]; 
 
extern int location[]; 
extern int lod_level; 
 
#endif