tron@3518: /* $Id$ */
tron@3518: 
tron@3518: #ifndef ROAD_H
tron@3518: #define ROAD_H
tron@3518: 
tron@3518: typedef enum RoadBits {
tron@3518: 	ROAD_NW  = 1,
tron@3518: 	ROAD_SW  = 2,
tron@3518: 	ROAD_SE  = 4,
tron@3518: 	ROAD_NE  = 8,
tron@3518: 	ROAD_X   = ROAD_SW | ROAD_NE,
tron@3518: 	ROAD_Y   = ROAD_NW | ROAD_SE,
tron@3518: 	ROAD_ALL = ROAD_X  | ROAD_Y
tron@3518: } RoadBits;
tron@3518: 
tron@3518: static inline RoadBits ComplementRoadBits(RoadBits r)
tron@3518: {
tron@3518: 	return ROAD_ALL ^ r;
tron@3518: }
tron@3518: 
tron@3518: static inline RoadBits DiagDirToRoadBits(DiagDirection d)
tron@3518: {
tron@3518: 	return 1 << (3 ^ d);
tron@3518: }
tron@3518: 
tron@3518: #endif