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: 
celestar@5573: void DrawBridgeMiddle(const TileInfo* ti); // XXX
celestar@5573: 
celestar@5601: #define M(x) (1 << (x))
celestar@5601: enum {
celestar@5601: 	// foundation, whole tile is leveled up --> 3 corners raised
celestar@5601: 	BRIDGE_FULL_LEVELED_FOUNDATION = M(SLOPE_WSE) | M(SLOPE_NWS) | M(SLOPE_ENW) | M(SLOPE_SEN),
celestar@5601: 	// foundation, tile is partly leveled up --> 1 corner raised
celestar@5601: 	BRIDGE_PARTLY_LEVELED_FOUNDATION = M(SLOPE_W) | M(SLOPE_S) | M(SLOPE_E) | M(SLOPE_N),
celestar@5601: 	// no foundations (X,Y direction)
celestar@5601: 	BRIDGE_NO_FOUNDATION = M(SLOPE_FLAT) | M(SLOPE_SW) | M(SLOPE_SE) | M(SLOPE_NW) | M(SLOPE_NE),
celestar@5601: 	BRIDGE_HORZ_RAMP = (BRIDGE_PARTLY_LEVELED_FOUNDATION | BRIDGE_NO_FOUNDATION) & ~M(SLOPE_FLAT)
celestar@5601: };
celestar@5601: #undef M
celestar@5601: 
celestar@5573: 
celestar@5591: static inline bool IsBridgeTile(TileIndex t)
tron@3234: {
celestar@5590: 	return IsTileType(t, MP_STREET_BRIDGE) || IsTileType(t, MP_RAILWAY_BRIDGE);
tron@3234: }
tron@3234: 
celestar@5573: static inline bool MayHaveBridgeAbove(TileIndex t)
tron@3214: {
celestar@5573: 	return
celestar@5573: 		IsTileType(t, MP_CLEAR) ||
celestar@5573: 		IsTileType(t, MP_RAILWAY) ||
celestar@5573: 		IsTileType(t, MP_STREET) ||
celestar@5573: 		IsTileType(t, MP_WATER) ||
celestar@5590: 		IsTileType(t, MP_TUNNEL) ||
celestar@5590: 		IsTileType(t, MP_STREET_BRIDGE) ||
celestar@5590: 		IsTileType(t, MP_RAILWAY_BRIDGE) ||
celestar@5573: 		IsTileType(t, MP_UNMOVABLE);
tron@3225: }
tron@3225: 
tron@3225: 
celestar@5573: static inline bool IsBridgeAbove(TileIndex t)
celestar@3933: {
celestar@5573: 	assert(MayHaveBridgeAbove(t));
celestar@5573: 	return GB(_m[t].extra, 6, 2) != 0;
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: {
celestar@5573: 	assert(IsBridgeTile(t));
celestar@5596: 	return (DiagDirection)GB(_m[t].m4, 5, 2);
tron@3196: }
tron@3196: 
tron@3196: 
tron@3225: static inline Axis GetBridgeAxis(TileIndex t)
tron@3225: {
celestar@5573: 	assert(IsBridgeAbove(t));
celestar@5573: 	return (Axis)(GB(_m[t].extra, 6, 2) - 1);
tron@3225: }
tron@3225: 
tron@3225: 
tron@3234: static inline TransportType GetBridgeTransportType(TileIndex t)
tron@3234: {
tron@3369: 	assert(IsBridgeTile(t));
celestar@5590: 	if (IsTileType(t, MP_STREET_BRIDGE)) return TRANSPORT_ROAD;
celestar@5590: 
celestar@5590: 	return TRANSPORT_RAIL;
tron@3977: }
tron@3977: 
tron@3977: 
celestar@5592: static inline bool HasBridgeSnowOrDesert(TileIndex t)
celestar@5592: {
celestar@5592: 	assert(IsBridgeTile(t));
celestar@5592: 	return HASBIT(_m[t].m4, 7);
celestar@5592: }
celestar@5592: 
celestar@5592: 
celestar@5592: static inline void SetBridgeSnowOrDesert(TileIndex t, bool snow_or_desert)
celestar@5592: {
celestar@5592: 	assert(IsBridgeTile(t));
celestar@5592: 	SB(_m[t].m4, 7, 1, snow_or_desert);
celestar@5592: }
celestar@5592: 
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: /**
celestar@5573:  * Finds the northern end of a bridge starting at a middle tile
celestar@5573:  */
celestar@5573: TileIndex GetNorthernBridgeEnd(TileIndex t);
celestar@5573: 
celestar@5573: /**
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: 
celestar@5573: uint GetBridgeHeight(TileIndex tile);
celestar@5573: uint GetBridgeFoundation(Slope tileh, Axis axis);
tron@3214: 
celestar@5573: static inline void ClearSingleBridgeMiddle(TileIndex t, Axis a)
tron@3189: {
celestar@5573: 	assert(MayHaveBridgeAbove(t));
celestar@5573: 	CLRBIT(_m[t].extra, 6 + a);
tron@3189: }
tron@3189: 
celestar@5573: 
celestar@5573: static inline void ClearBridgeMiddle(TileIndex t)
tron@3189: {
celestar@5573: 	ClearSingleBridgeMiddle(t, AXIS_X);
celestar@5573: 	ClearSingleBridgeMiddle(t, AXIS_Y);
tron@3977: }
tron@3977: 
celestar@5573: static inline void SetBridgeMiddle(TileIndex t, Axis a)
tron@3977: {
celestar@5573: 	assert(MayHaveBridgeAbove(t));
celestar@5573: 	SETBIT(_m[t].extra, 6 + a);
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: 	SetTileOwner(t, o);
tron@3209: 	_m[t].m2 = bridgetype << 4;
celestar@5600: 	_m[t].m4 = d << 5;
celestar@5600: 	_m[t].m5 = 0;
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);
celestar@5590: 	SetTileType(t, MP_STREET_BRIDGE);
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);
celestar@5590: 	SetTileType(t, MP_RAILWAY_BRIDGE);
tron@3209: 	_m[t].m3 = r;
celestar@5600: 	_m[t].m5 = DiagDirToAxis(d) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y;
tron@3209: }
tron@3209: 
tron@3209: 
peter1138@4666: #endif /* BRIDGE_MAP_H */