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@3189: #include "tile.h"
tron@3189: 
tron@3189: 
tron@3214: static inline bool IsBridgeRamp(TileIndex t)
tron@3214: {
tron@3214: 	return !HASBIT(_m[t].m5, 6);
tron@3214: }
tron@3214: 
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@3196: 	/* Heavy wizardry to convert the X/Y (bit 0) + N/S (bit 5) encoding of
tron@3196: 	 * bridges to a DiagDirection
tron@3196: 	 */
tron@3196: 	return (DiagDirection)((6 - (_m[t].m5 >> 4 & 2) - (_m[t].m5 & 1)) % 4);
tron@3196: }
tron@3196: 
tron@3196: 
tron@3216: static inline bool IsClearUnderBridge(TileIndex t)
tron@3216: {
tron@3216: 	return GB(_m[t].m5, 3, 3) == 0;
tron@3216: }
tron@3216: 
tron@3216: 
tron@3216: static inline bool IsTransportUnderBridge(TileIndex t)
tron@3216: {
tron@3216: 	return HASBIT(_m[t].m5, 5);
tron@3216: }
tron@3216: 
tron@3216: static inline TransportType GetTransportTypeUnderBridge(TileIndex t)
tron@3216: {
tron@3216: 	return (TransportType)GB(_m[t].m5, 3, 2);
tron@3216: }
tron@3216: 
tron@3216: 
tron@3214: /**
tron@3214:  * Starting at one bridge end finds the other bridge end
tron@3214:  */
tron@3214: TileIndex GetOtherBridgeEnd(TileIndex);
tron@3214: 
tron@3214: 
tron@3189: static inline void SetClearUnderBridge(TileIndex t)
tron@3189: {
tron@3189: 	SetTileOwner(t, OWNER_NONE);
tron@3189: 	SB(_m[t].m5, 3, 3, 0 << 2 | 0);
tron@3189: }
tron@3189: 
tron@3189: static inline void SetWaterUnderBridge(TileIndex t)
tron@3189: {
tron@3189: 	SetTileOwner(t, OWNER_WATER);
tron@3189: 	SB(_m[t].m5, 3, 3, 0 << 2 | 1);
tron@3189: }
tron@3189: 
tron@3189: static inline void SetRailUnderBridge(TileIndex t, Owner o, RailType r)
tron@3189: {
tron@3189: 	SetTileOwner(t, o);
tron@3189: 	SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_RAIL);
tron@3189: 	SB(_m[t].m3, 0, 4, r);
tron@3189: }
tron@3189: 
tron@3189: static inline void SetRoadUnderBridge(TileIndex t, Owner o)
tron@3189: {
tron@3189: 	SetTileOwner(t, o);
tron@3189: 	SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_ROAD);
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@3209: static inline void MakeBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, TransportType tt)
tron@3209: {
tron@3209: 	SetTileType(t, MP_TUNNELBRIDGE);
tron@3209: 	SetTileOwner(t, OWNER_NONE);
tron@3209: 	_m[t].m2 = bridgetype << 4 | piece;
tron@3209: 	_m[t].m3 = 0;
tron@3209: 	_m[t].m4 = 0;
tron@3209: 	_m[t].m5 = 1 << 7 | 1 << 6 | 0 << 5 | 0 << 3 | tt << 1 | a;
tron@3209: }
tron@3209: 
tron@3209: static inline void MakeRoadBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a)
tron@3209: {
tron@3209: 	MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_ROAD);
tron@3209: }
tron@3209: 
tron@3209: static inline void MakeRailBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, RailType r)
tron@3209: {
tron@3209: 	MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_RAIL);
tron@3209: 	SB(_m[t].m3, 4, 4, r);
tron@3209: }
tron@3209: 
tron@3209: 
tron@3189: #endif