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44 lines
823 B
C
44 lines
823 B
C
/* $Id$ */
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#ifndef ROAD_H
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#define ROAD_H
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#include "helpers.hpp"
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typedef enum RoadBits {
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ROAD_NONE = 0U,
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ROAD_NW = 1U,
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ROAD_SW = 2U,
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ROAD_SE = 4U,
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ROAD_NE = 8U,
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ROAD_X = ROAD_SW | ROAD_NE,
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ROAD_Y = ROAD_NW | ROAD_SE,
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ROAD_ALL = ROAD_X | ROAD_Y
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} RoadBits;
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DECLARE_ENUM_AS_BIT_SET(RoadBits);
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static inline RoadBits ComplementRoadBits(RoadBits r)
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{
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return (RoadBits)(ROAD_ALL ^ r);
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}
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static inline RoadBits DiagDirToRoadBits(DiagDirection d)
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{
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return (RoadBits)(1U << (3 ^ d));
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}
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/** Checks whether the trackdir means that we are reversing */
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static inline bool IsReversingRoadTrackdir(Trackdir dir)
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{
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return (dir & 0x07) >= 6;
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}
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/** Checks whether the given trackdir is a straight road */
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static inline bool IsStraightRoadTrackdir(Trackdir dir)
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{
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return (dir & 0x06) == 0;
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}
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#endif /* ROAD_H */
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