tron@10032: /* $Id$ */
tron@10032: 
tron@10032: #ifndef DIRECTION_H
tron@10032: #define DIRECTION_H
tron@10032: 
tron@10032: 
tron@10032: /* the 2 axis */
tron@10032: typedef enum Axis {
tron@10032: 	AXIS_X = 0,
tron@10032: 	AXIS_Y = 1,
tron@10032: 	AXIS_END
tron@10032: } Axis;
tron@10032: 
tron@10032: 
tron@10032: static inline Axis DiagDirToAxis(uint d)
tron@10032: {
tron@10032: 	return (Axis)(d & 1);
tron@10032: }
tron@10032: 
tron@10032: 
tron@10032: /*
tron@10032:  * Converts an Axis to a DiagDirection
tron@10032:  * Points always in the positive direction, i.e. S[EW]
tron@10032:  */
tron@10032: static inline uint AxisToDiagDir(Axis a)
tron@10032: {
tron@10032: 	return (uint)(2 - a);
tron@10032: }
tron@10032: 
tron@10032: #endif