mirror of https://github.com/OpenTTD/OpenTTD.git
169 lines
3.5 KiB
C
169 lines
3.5 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 "road_map.h"
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#include "tile.h"
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void DrawBridgeMiddle(const TileInfo* ti); // XXX
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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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static inline bool IsBridgeTile(TileIndex t)
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{
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return IsTileType(t, MP_TUNNELBRIDGE) && IsBridge(t);
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}
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static inline bool MayHaveBridgeAbove(TileIndex t)
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{
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return
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IsTileType(t, MP_CLEAR) ||
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IsTileType(t, MP_RAILWAY) ||
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IsTileType(t, MP_STREET) ||
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IsTileType(t, MP_WATER) ||
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IsTileType(t, MP_TUNNELBRIDGE);
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}
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static inline bool IsXBridgeAbove(TileIndex t)
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{
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assert(MayHaveBridgeAbove(t));
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return GB(_m[t].extra, 6, 1) != 0;
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}
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static inline bool IsYBridgeAbove(TileIndex t)
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{
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assert(MayHaveBridgeAbove(t));
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return GB(_m[t].extra, 7, 1) != 0;
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}
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static inline bool IsBridgeOfAxis(TileIndex t, Axis a)
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{
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if (a == AXIS_X) return IsXBridgeAbove(t);
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return IsYBridgeAbove(t);
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}
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static inline bool IsBridgeAbove(TileIndex t)
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{
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return (IsXBridgeAbove(t) || IsYBridgeAbove(t));
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}
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/**
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* Determines the type of bridge on a 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 t)
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{
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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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/**
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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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return ReverseDiagDir(XYNSToDiagDir((Axis)GB(_m[t].m5, 0, 1), GB(_m[t].m5, 5, 1)));
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}
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static inline Axis GetBridgeAxis(TileIndex t)
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{
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static const Axis BridgeAxis[] = {AXIS_END, AXIS_X, AXIS_Y, AXIS_END};
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assert(IsBridgeAbove(t));
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return BridgeAxis[GB(_m[t].extra, 6, 2)];
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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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/**
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* Finds the end of a bridge in the specified direction starting at a middle tile
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*/
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TileIndex GetBridgeEnd(TileIndex, DiagDirection);
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/**
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* Finds the northern end of a bridge starting at a middle tile
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*/
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TileIndex GetNorthernBridgeEnd(TileIndex t);
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/**
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* Finds the southern end of a bridge starting at a middle tile
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*/
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TileIndex GetSouthernBridgeEnd(TileIndex t);
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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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uint GetBridgeHeight(TileIndex tile, Axis a);
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uint GetBridgeFoundation(Slope tileh, Axis axis);
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static inline void ClearSingleBridgeMiddle(TileIndex t, Axis a)
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{
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assert(MayHaveBridgeAbove(t));
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CLRBIT(_m[t].extra, 6 + a);
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}
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static inline void ClearBridgeMiddle(TileIndex t)
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{
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ClearSingleBridgeMiddle(t, AXIS_X);
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ClearSingleBridgeMiddle(t, AXIS_Y);
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}
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static inline void SetBridgeMiddle(TileIndex t, Axis a)
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{
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assert(MayHaveBridgeAbove(t));
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SETBIT(_m[t].extra, 6 + a);
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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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#endif
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