127 lines
2.8 KiB
C
127 lines
2.8 KiB
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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static inline bool IsBridgeRamp(TileIndex t)
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{
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return !HASBIT(_m[t].m5, 6);
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}
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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 bool IsClearUnderBridge(TileIndex t)
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{
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return GB(_m[t].m5, 3, 3) == 0;
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}
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static inline bool IsTransportUnderBridge(TileIndex t)
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{
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return HASBIT(_m[t].m5, 5);
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}
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static inline TransportType GetTransportTypeUnderBridge(TileIndex t)
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{
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return (TransportType)GB(_m[t].m5, 3, 2);
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}
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/**
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* Starting at one bridge end finds the other bridge end
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*/
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TileIndex GetOtherBridgeEnd(TileIndex);
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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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static inline void MakeBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d, TransportType tt)
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{
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uint northsouth = (d == DIAGDIR_NE || d == DIAGDIR_NW);
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SetTileType(t, MP_TUNNELBRIDGE);
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SetTileOwner(t, o);
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_m[t].m2 = bridgetype << 4;
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_m[t].m4 = 0;
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_m[t].m5 = 1 << 7 | 0 << 6 | northsouth << 5 | tt << 1 | DiagDirToAxis(d);
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}
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static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d)
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{
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MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD);
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_m[t].m3 = 0;
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}
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static inline void MakeRailBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d, RailType r)
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{
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MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL);
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_m[t].m3 = r;
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}
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static inline void MakeBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, TransportType tt)
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{
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SetTileType(t, MP_TUNNELBRIDGE);
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SetTileOwner(t, OWNER_NONE);
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_m[t].m2 = bridgetype << 4 | piece;
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_m[t].m3 = 0;
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_m[t].m4 = 0;
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_m[t].m5 = 1 << 7 | 1 << 6 | 0 << 5 | 0 << 3 | tt << 1 | a;
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}
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static inline void MakeRoadBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a)
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{
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MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_ROAD);
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}
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static inline void MakeRailBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, RailType r)
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{
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MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_RAIL);
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SB(_m[t].m3, 4, 4, r);
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}
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#endif
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