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/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file tunnel_map.h Map accessors for tunnels. */
#ifndef TUNNEL_MAP_H
#define TUNNEL_MAP_H
#include "rail_map.h"
#include "road_map.h"
typedef uint16 TunnelID; ///< Type for the unique identifier of tunnels.
/**
* Is this a tunnel (entrance)?
* @param t the tile that might be a tunnel
* @pre IsTileType(t, MP_TUNNELBRIDGE)
* @return true if and only if this tile is a tunnel (entrance)
*/
static inline bool IsTunnel(TileIndex t)
{
assert(IsTileType(t, MP_TUNNELBRIDGE));
return !HasBit(_m[t].m5, 7);
}
/**
* Is this a tunnel (entrance)?
* @param t the tile that might be a tunnel
* @return true if and only if this tile is a tunnel (entrance)
*/
static inline bool IsTunnelTile(TileIndex t)
{
return IsTileType(t, MP_TUNNELBRIDGE) && IsTunnel(t);
}
/**
* Get the index of tunnel tile.
* @param t the tile
* @pre IsTunnelTile(t)
* @return TunnelID
*/
static inline TunnelID GetTunnelIndex(TileIndex t)
{
assert(IsTunnelTile(t));
return _m[t].m2;
}
TileIndex GetOtherTunnelEnd(TileIndex);
bool IsTunnelInWay(TileIndex, int z, bool chunnel_allowed = false);
/**
* Makes a road tunnel entrance
* @param t the entrance of the tunnel
* @param o the owner of the entrance
* @param id the tunnel ID
* @param d the direction facing out of the tunnel
* @param r the road type used in the tunnel
*/
static inline void MakeRoadTunnel(TileIndex t, Owner o, TunnelID id, DiagDirection d, RoadType road_rt, RoadType tram_rt)
{
SetTileType(t, MP_TUNNELBRIDGE);
SetTileOwner(t, o);
_m[t].m2 = id;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = TRANSPORT_ROAD << 2 | d;
SB(_me[t].m6, 2, 4, 0);
_me[t].m7 = 0;
_me[t].m8 = 0;
SetRoadOwner(t, RTT_ROAD, o);
if (o != OWNER_TOWN) SetRoadOwner(t, RTT_TRAM, o);
SetRoadTypes(t, road_rt, tram_rt);
}
/**
* Makes a rail tunnel entrance
* @param t the entrance of the tunnel
* @param o the owner of the entrance
* @param id the tunnel ID
* @param d the direction facing out of the tunnel
* @param r the rail type used in the tunnel
*/
static inline void MakeRailTunnel(TileIndex t, Owner o, TunnelID id, DiagDirection d, RailType r)
{
SetTileType(t, MP_TUNNELBRIDGE);
SetTileOwner(t, o);
_m[t].m2 = id;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = TRANSPORT_RAIL << 2 | d;
SB(_me[t].m6, 2, 4, 0);
_me[t].m7 = 0;
_me[t].m8 = 0;
SetRailType(t, r);
SetRoadTypes(t, INVALID_ROADTYPE, INVALID_ROADTYPE);
}
#endif /* TUNNEL_MAP_H */
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