tron@3518: /* $Id$ */
tron@3518: 
tron@3518: #ifndef ROAD_H
tron@3518: #define ROAD_H
tron@3518: 
rubidium@5587: #include "helpers.hpp"
rubidium@5587: 
tron@3518: typedef enum RoadBits {
rubidium@5587: 	ROAD_NONE = 0U,
peter1138@3795: 	ROAD_NW  = 1U,
peter1138@3795: 	ROAD_SW  = 2U,
peter1138@3795: 	ROAD_SE  = 4U,
peter1138@3795: 	ROAD_NE  = 8U,
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: 
rubidium@5587: DECLARE_ENUM_AS_BIT_SET(RoadBits);
rubidium@5587: 
tron@3518: static inline RoadBits ComplementRoadBits(RoadBits r)
tron@3518: {
KUDr@3900: 	return (RoadBits)(ROAD_ALL ^ r);
tron@3518: }
tron@3518: 
tron@3518: static inline RoadBits DiagDirToRoadBits(DiagDirection d)
tron@3518: {
KUDr@3900: 	return (RoadBits)(1U << (3 ^ d));
tron@3518: }
tron@3518: 
rubidium@6009: /** Checks whether the trackdir means that we are reversing */
rubidium@6009: static inline bool IsReversingRoadTrackdir(Trackdir dir)
rubidium@6009: {
rubidium@6009: 	return (dir & 0x07) >= 6;
rubidium@6009: }
rubidium@6009: 
rubidium@6009: /** Checks whether the given trackdir is a straight road */
rubidium@6009: static inline bool IsStraightRoadTrackdir(Trackdir dir)
rubidium@6009: {
rubidium@6009: 	return (dir & 0x06) == 0;
rubidium@6009: }
rubidium@6009: 
peter1138@4666: #endif /* ROAD_H */