#define rayNONE 0.0
#define rayEPSILON 0.000001
#define rayINF 1000000.0
#define rayNEGINF -1000000.0

/* Feel free to read and write this data structure's members. */
typedef struct rayIntersection rayIntersection;
struct rayIntersection {
    double start;
    double end;
};