42d1731cc1
Note: This slightly changes the behavior of GetAnyRoadBits() to only return a road piece for the start of the bridge ramp instead of a full ROAD_[XY]
51 lines
1006 B
C
51 lines
1006 B
C
/* $Id$ */
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#ifndef BRIDGE_MAP_H
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#define BRIDGE_MAP_H
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#include "direction.h"
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#include "macros.h"
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#include "map.h"
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#include "rail.h"
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#include "tile.h"
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/**
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* Get the direction pointing onto the bridge
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*/
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static inline DiagDirection GetBridgeRampDirection(TileIndex t)
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{
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/* Heavy wizardry to convert the X/Y (bit 0) + N/S (bit 5) encoding of
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* bridges to a DiagDirection
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*/
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return (DiagDirection)((6 - (_m[t].m5 >> 4 & 2) - (_m[t].m5 & 1)) % 4);
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}
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static inline void SetClearUnderBridge(TileIndex t)
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{
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SetTileOwner(t, OWNER_NONE);
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SB(_m[t].m5, 3, 3, 0 << 2 | 0);
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}
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static inline void SetWaterUnderBridge(TileIndex t)
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{
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SetTileOwner(t, OWNER_WATER);
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SB(_m[t].m5, 3, 3, 0 << 2 | 1);
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}
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static inline void SetRailUnderBridge(TileIndex t, Owner o, RailType r)
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{
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SetTileOwner(t, o);
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SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_RAIL);
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SB(_m[t].m3, 0, 4, r);
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}
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static inline void SetRoadUnderBridge(TileIndex t, Owner o)
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{
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SetTileOwner(t, o);
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SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_ROAD);
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}
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#endif
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