tron@3189: /* $Id$ */
tron@3189: 
tron@3189: #ifndef BRIDGE_MAP_H
tron@3189: #define BRIDGE_MAP_H
tron@3189: 
tron@3196: #include "direction.h"
tron@3189: #include "macros.h"
tron@3189: #include "map.h"
tron@3189: #include "rail.h"
tron@3234: #include "road_map.h"
tron@3189: #include "tile.h"
tron@3189: 
tron@3189: 
tron@3234: static inline bool IsBridge(TileIndex t)
tron@3234: {
tron@3369: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
tron@3234: 	return HASBIT(_m[t].m5, 7);
tron@3234: }
tron@3234: 
tron@3234: static inline bool IsBridgeTile(TileIndex t)
tron@3234: {
tron@3234: 	return IsTileType(t, MP_TUNNELBRIDGE) && IsBridge(t);
tron@3234: }
tron@3234: 
tron@3234: 
tron@3977: static inline bool IsBridgeRamp(TileIndex t)
tron@3214: {
tron@3977: 	assert(IsBridgeTile(t));
tron@3977: 	return !HASBIT(_m[t].m5, 6);
tron@3977: }
tron@3977: 
tron@3977: static inline bool IsBridgeMiddle(TileIndex t)
tron@3977: {
tron@3977: 	assert(IsBridgeTile(t));
tron@3977: 	return HASBIT(_m[t].m5, 6);
tron@3225: }
tron@3225: 
tron@3225: 
tron@3977: /**
tron@3977:  * Determines which piece of a bridge is contained in the current tile
tron@3977:  * @param tile The tile to analyze
tron@3977:  * @return the piece
tron@3977:  */
tron@3977: static inline uint GetBridgePiece(TileIndex t)
celestar@3933: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	return GB(_m[t].m2, 0, 4);
tron@3231: }
tron@3231: 
tron@3231: 
tron@3231: /**
tron@3231:  * Determines the type of bridge on a tile
tron@3231:  * @param tile The tile to analyze
tron@3231:  * @return The bridge type
tron@3231:  */
tron@3369: static inline uint GetBridgeType(TileIndex t)
tron@3231: {
tron@3369: 	assert(IsBridgeTile(t));
tron@3369: 	return GB(_m[t].m2, 4, 4);
tron@3231: }
tron@3231: 
tron@3214: 
tron@3196: /**
tron@3196:  * Get the direction pointing onto the bridge
tron@3196:  */
tron@3196: static inline DiagDirection GetBridgeRampDirection(TileIndex t)
tron@3196: {
tron@3977: 	assert(IsBridgeRamp(t));
tron@3953: 	return ReverseDiagDir(XYNSToDiagDir((Axis)GB(_m[t].m5, 0, 1), GB(_m[t].m5, 5, 1)));
tron@3196: }
tron@3196: 
tron@3196: 
tron@3225: static inline Axis GetBridgeAxis(TileIndex t)
tron@3225: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	return (Axis)GB(_m[t].m5, 0, 1);
tron@3225: }
tron@3225: 
tron@3225: 
tron@3234: static inline TransportType GetBridgeTransportType(TileIndex t)
tron@3234: {
tron@3369: 	assert(IsBridgeTile(t));
tron@3234: 	return (TransportType)GB(_m[t].m5, 1, 2);
tron@3234: }
tron@3234: 
tron@3234: 
tron@3977: static inline bool IsClearUnderBridge(TileIndex t)
tron@3977: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	return GB(_m[t].m5, 3, 3) == 0;
tron@3977: }
tron@3977: 
tron@3977: static inline bool IsWaterUnderBridge(TileIndex t)
tron@3977: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	return GB(_m[t].m5, 3, 3) == 1;
tron@3977: }
tron@3977: 
tron@3977: 
tron@3977: static inline bool IsTransportUnderBridge(TileIndex t)
tron@3977: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	return HASBIT(_m[t].m5, 5);
tron@3977: }
tron@3977: 
tron@3977: static inline TransportType GetTransportTypeUnderBridge(TileIndex t)
tron@3977: {
tron@3977: 	assert(IsTransportUnderBridge(t));
tron@3977: 	return (TransportType)GB(_m[t].m5, 3, 2);
tron@3977: }
tron@3977: 
tron@3977: static inline RoadBits GetRoadBitsUnderBridge(TileIndex t)
tron@3977: {
tron@3977: 	assert(GetTransportTypeUnderBridge(t) == TRANSPORT_ROAD);
tron@3977: 	return GetBridgeAxis(t) == AXIS_X ? ROAD_Y : ROAD_X;
tron@3977: }
tron@3977: 
tron@3977: static inline TrackBits GetRailBitsUnderBridge(TileIndex t)
tron@3977: {
tron@3977: 	assert(GetTransportTypeUnderBridge(t) == TRANSPORT_RAIL);
tron@3977: 	return GetBridgeAxis(t) == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X;
tron@3977: }
tron@3977: 
tron@3977: 
tron@3214: /**
tron@3225:  * Finds the end of a bridge in the specified direction starting at a middle tile
tron@3225:  */
tron@3225: TileIndex GetBridgeEnd(TileIndex, DiagDirection);
tron@3225: 
tron@3225: /**
tron@3225:  * Finds the southern end of a bridge starting at a middle tile
tron@3225:  */
tron@3225: TileIndex GetSouthernBridgeEnd(TileIndex t);
tron@3225: 
tron@3225: 
tron@3225: /**
tron@3214:  * Starting at one bridge end finds the other bridge end
tron@3214:  */
tron@3214: TileIndex GetOtherBridgeEnd(TileIndex);
tron@3214: 
tron@3977: uint GetBridgeHeight(TileIndex t);
tron@3214: 
tron@3977: static inline void SetClearUnderBridge(TileIndex t)
tron@3189: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	SetTileOwner(t, OWNER_NONE);
tron@3977: 	SB(_m[t].m5, 3, 3, 0 << 2 | 0);
tron@3977: 	SB(_m[t].m3, 0, 4, 0);
tron@3189: }
tron@3189: 
tron@3977: static inline void SetWaterUnderBridge(TileIndex t)
tron@3189: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	SetTileOwner(t, OWNER_WATER);
tron@3977: 	SB(_m[t].m5, 3, 3, 0 << 2 | 1);
tron@3977: 	SB(_m[t].m3, 0, 4, 0);
tron@3189: }
tron@3189: 
tron@3977: static inline void SetCanalUnderBridge(TileIndex t, Owner o)
tron@3189: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	SetTileOwner(t, o);
tron@3977: 	SB(_m[t].m5, 3, 3, 0 << 2 | 1);
tron@3977: 	SB(_m[t].m3, 0, 4, 0);
tron@3977: }
tron@3977: 
tron@3977: static inline void SetRailUnderBridge(TileIndex t, Owner o, RailType r)
tron@3977: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	SetTileOwner(t, o);
tron@3977: 	SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_RAIL);
tron@3977: 	SB(_m[t].m3, 0, 4, r);
tron@3977: }
tron@3977: 
tron@3977: static inline void SetRoadUnderBridge(TileIndex t, Owner o)
tron@3977: {
tron@3977: 	assert(IsBridgeMiddle(t));
tron@3977: 	SetTileOwner(t, o);
tron@3977: 	SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_ROAD);
tron@3977: 	SB(_m[t].m3, 0, 4, 0);
tron@3189: }
tron@3189: 
tron@3209: 
tron@3209: static inline void MakeBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d, TransportType tt)
tron@3209: {
tron@3209: 	uint northsouth = (d == DIAGDIR_NE || d == DIAGDIR_NW);
tron@3209: 
tron@3209: 	SetTileType(t, MP_TUNNELBRIDGE);
tron@3209: 	SetTileOwner(t, o);
tron@3209: 	_m[t].m2 = bridgetype << 4;
tron@3209: 	_m[t].m4 = 0;
tron@3209: 	_m[t].m5 = 1 << 7 | 0 << 6 | northsouth << 5 | tt << 1 | DiagDirToAxis(d);
tron@3209: }
tron@3209: 
tron@3209: static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d)
tron@3209: {
tron@3209: 	MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD);
tron@3209: 	_m[t].m3 = 0;
tron@3209: }
tron@3209: 
tron@3209: static inline void MakeRailBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d, RailType r)
tron@3209: {
tron@3209: 	MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL);
tron@3209: 	_m[t].m3 = r;
tron@3209: }
tron@3209: 
tron@3209: 
tron@3977: static inline void MakeBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, TransportType tt)
tron@3977: {
tron@3977: 	SetTileType(t, MP_TUNNELBRIDGE);
tron@3977: 	SetTileOwner(t, OWNER_NONE);
tron@3977: 	_m[t].m2 = bridgetype << 4 | piece;
tron@3977: 	_m[t].m3 = 0;
tron@3977: 	_m[t].m4 = 0;
tron@3977: 	_m[t].m5 = 1 << 7 | 1 << 6 | 0 << 5 | 0 << 3 | tt << 1 | a;
tron@3977: }
tron@3977: 
tron@3977: static inline void MakeRoadBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a)
tron@3977: {
tron@3977: 	MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_ROAD);
tron@3977: }
tron@3977: 
tron@3977: static inline void MakeRailBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, RailType r)
tron@3977: {
tron@3977: 	MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_RAIL);
tron@3977: 	SB(_m[t].m3, 4, 4, r);
tron@3977: }
tron@3977: 
tron@3977: 
tron@3189: #endif