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128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/* $Id$ */
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/** @file tunnel_map.h */
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#ifndef TUNNEL_MAP_H
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#define TUNNEL_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.h"
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/**
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* Is this a tunnel (entrance)?
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* @param t the tile that might be a tunnel
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if this tile is a tunnel (entrance)
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*/
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static inline bool IsTunnel(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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/**
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* Is this a tunnel (entrance)?
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* @param t the tile that might be a tunnel
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* @return true if and only if this tile is a tunnel (entrance)
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*/
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static inline bool IsTunnelTile(TileIndex t)
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{
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return IsTileType(t, MP_TUNNELBRIDGE) && IsTunnel(t);
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}
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/**
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* Gets the direction facing out of the tunnel
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* @param t the tile to get the tunnel facing direction of
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* @pre IsTunnelTile(t)
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* @return the direction the tunnel is facing
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*/
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static inline DiagDirection GetTunnelDirection(TileIndex t)
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{
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assert(IsTunnelTile(t));
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return (DiagDirection)GB(_m[t].m5, 0, 2);
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}
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/**
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* Gets the transport type of the tunnel (road or rail)
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* @param t the tunnel entrance tile to get the type of
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* @pre IsTunnelTile(t)
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* @return the transport type in the tunnel
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*/
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static inline TransportType GetTunnelTransportType(TileIndex t)
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{
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assert(IsTunnelTile(t));
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return (TransportType)GB(_m[t].m5, 2, 2);
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}
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/**
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* Is this tunnel entrance in a snowy or desert area?
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* @param t the tunnel entrance tile
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* @pre IsTunnelTile(t)
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* @return true if and only if the tunnel entrance is in a snowy/desert area
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*/
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static inline bool HasTunnelSnowOrDesert(TileIndex t)
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{
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assert(IsTunnelTile(t));
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return HASBIT(_m[t].m4, 7);
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}
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/**
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* Places this tunnel entrance in a snowy or desert area,
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* or takes it out of there.
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* @param t the tunnel entrance tile
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* @param snow_or_desert is the entrance in snow or desert (true), when
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* not in snow and not in desert false
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* @pre IsTunnelTile(t)
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*/
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static inline void SetTunnelSnowOrDesert(TileIndex t, bool snow_or_desert)
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{
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assert(IsTunnelTile(t));
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SB(_m[t].m4, 7, 1, snow_or_desert);
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}
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TileIndex GetOtherTunnelEnd(TileIndex);
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bool IsTunnelInWay(TileIndex, uint z);
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bool IsTunnelInWayDir(TileIndex tile, uint z, DiagDirection dir);
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/**
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* Makes a road tunnel entrance
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* @param t the entrance of the tunnel
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* @param o the owner of the entrance
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* @param d the direction facing out of the tunnel
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* @param r the road type used in the tunnel
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*/
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static inline void MakeRoadTunnel(TileIndex t, Owner o, DiagDirection d, RoadTypes r)
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{
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SetTileType(t, MP_TUNNELBRIDGE);
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SetTileOwner(t, o);
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_m[t].m2 = 0;
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_m[t].m3 = r;
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_m[t].m4 = 0;
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_m[t].m5 = TRANSPORT_ROAD << 2 | d;
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}
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/**
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* Makes a rail tunnel entrance
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* @param t the entrance of the tunnel
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* @param o the owner of the entrance
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* @param d the direction facing out of the tunnel
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* @param r the rail type used in the tunnel
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*/
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static inline void MakeRailTunnel(TileIndex t, Owner o, DiagDirection d, RailType r)
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{
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SetTileType(t, MP_TUNNELBRIDGE);
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SetTileOwner(t, o);
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_m[t].m2 = 0;
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_m[t].m3 = r;
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_m[t].m4 = 0;
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_m[t].m5 = TRANSPORT_RAIL << 2 | d;
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}
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#endif /* TUNNEL_MAP_H */
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