#ifndef COG_H
#define COG_H __DATE__" "__TIME__

#define Cog_InvalidRadius (0.0)

typedef struct cog cog_t;

extern cog_t * cog_ctor(void);
extern void    cog_dtor(cog_t **);
extern float   cog_radius(cog_t *);
extern int     cog_radius_set(cog_t *, float);

#endif /* COG_H */