#ifndef HEX_H_
#define HEX_H_ 1

struct hex {
        int iso;
        int x, y, z;
};

int hexbin2(int horizontal, double width, double x, double y,
                int *i, int *j);

int hexbin(int horizontal, double width, double x, double y,
                int *i, int *j);
int hex_xy(struct hex *h);
int hex_iso(struct hex *h);

int hex_distance(struct hex *a, struct hex *b);
int hex_bearing(struct hex *a, struct hex *b);
int hex_at(struct hex *h, int distance, struct hex **list);
int hex_within(struct hex *h, int distance, struct hex **list);
int hex_dir(struct hex *h, int direction);

#endif