#ifndef FLIP_H_INCLUDED
#define FLIP_H_INCLUDED

struct xformCore {
    /* a b
       c d
    */
    int a;  /* -1, 0, or 1 */
    int b;  /* -1, 0, or 1 */
    int c;  /* -1, 0, or 1 */
    int d;  /* -1, 0, or 1 */
};



#endif
