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@ -13,6 +13,7 @@
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static inline bool IsBridge(TileIndex t)
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{
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assert(IsTileType(t, MP_TUNNELBRIDGE));
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return HASBIT(_m[t].m5, 7);
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}
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@ -24,11 +25,13 @@ static inline bool IsBridgeTile(TileIndex t)
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static inline bool IsBridgeRamp(TileIndex t)
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{
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assert(IsBridgeTile(t));
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return !HASBIT(_m[t].m5, 6);
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}
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static inline bool IsBridgeMiddle(TileIndex t)
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{
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assert(IsBridgeTile(t));
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return HASBIT(_m[t].m5, 6);
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}
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@ -38,9 +41,10 @@ static inline bool IsBridgeMiddle(TileIndex t)
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* @param tile The tile to analyze
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* @return the piece
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*/
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static inline uint GetBridgePiece(TileIndex tile)
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static inline uint GetBridgePiece(TileIndex t)
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{
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return GB(_m[tile].m2, 0, 4);
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assert(IsBridgeMiddle(t));
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return GB(_m[t].m2, 0, 4);
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}
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@ -49,9 +53,10 @@ static inline uint GetBridgePiece(TileIndex tile)
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* @param tile The tile to analyze
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* @return The bridge type
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*/
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static inline uint GetBridgeType(TileIndex tile)
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static inline uint GetBridgeType(TileIndex t)
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{
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return GB(_m[tile].m2, 4, 4);
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assert(IsBridgeTile(t));
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return GB(_m[t].m2, 4, 4);
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}
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@ -60,6 +65,7 @@ static inline uint GetBridgeType(TileIndex tile)
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*/
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static inline DiagDirection GetBridgeRampDirection(TileIndex t)
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{
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assert(IsBridgeRamp(t));
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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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@ -69,44 +75,52 @@ static inline DiagDirection GetBridgeRampDirection(TileIndex t)
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static inline Axis GetBridgeAxis(TileIndex t)
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{
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assert(IsBridgeMiddle(t));
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return (Axis)GB(_m[t].m5, 0, 1);
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}
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static inline TransportType GetBridgeTransportType(TileIndex t)
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{
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assert(IsBridgeTile(t));
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return (TransportType)GB(_m[t].m5, 1, 2);
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}
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static inline bool IsClearUnderBridge(TileIndex t)
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{
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assert(IsBridgeMiddle(t));
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return GB(_m[t].m5, 3, 3) == 0;
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}
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static inline bool IsWaterUnderBridge(TileIndex t)
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{
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assert(IsBridgeMiddle(t));
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return GB(_m[t].m5, 3, 3) == 1;
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}
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static inline bool IsTransportUnderBridge(TileIndex t)
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{
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assert(IsBridgeMiddle(t));
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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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assert(IsTransportUnderBridge(t));
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return (TransportType)GB(_m[t].m5, 3, 2);
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}
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static inline RoadBits GetRoadBitsUnderBridge(TileIndex t)
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{
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assert(GetTransportTypeUnderBridge(t) == TRANSPORT_ROAD);
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return GetBridgeAxis(t) == AXIS_X ? ROAD_Y : ROAD_X;
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}
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static inline TrackBits GetRailBitsUnderBridge(TileIndex t)
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{
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assert(GetTransportTypeUnderBridge(t) == TRANSPORT_RAIL);
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return GetBridgeAxis(t) == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X;
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}
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@ -131,18 +145,21 @@ uint GetBridgeHeight(TileIndex t);
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static inline void SetClearUnderBridge(TileIndex t)
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{
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assert(IsBridgeMiddle(t));
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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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assert(IsBridgeMiddle(t));
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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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assert(IsBridgeMiddle(t));
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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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@ -150,6 +167,7 @@ static inline void SetRailUnderBridge(TileIndex t, Owner o, RailType r)
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static inline void SetRoadUnderBridge(TileIndex t, Owner o)
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{
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assert(IsBridgeMiddle(t));
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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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