tunnel_map.h

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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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#ifndef TUNNEL_MAP_H
#define TUNNEL_MAP_H
 
#include "rail_map.h"
#include "road_map.h"
 

inline bool IsTunnel(Tile t)
{
  assert(IsTileType(t, TileType::TunnelBridge));
  return !HasBit(t.m5(), 7);
}

inline bool IsTunnelTile(Tile t)
{
  return IsTileType(t, TileType::TunnelBridge) && IsTunnel(t);
}
 
TileIndex GetOtherTunnelEnd(TileIndex);
bool IsTunnelInWay(TileIndex, int z);
bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir);

inline void MakeRoadTunnel(Tile t, Owner o, DiagDirection d, RoadType road_rt, RoadType tram_rt)
{
  SetTileType(t, TileType::TunnelBridge);
  SetTileOwner(t, o);
  t.m2() = 0;
  t.m3() = 0;
  t.m4() = 0;
  t.m5() = TRANSPORT_ROAD << 2 | to_underlying(d);
  SB(t.m6(), 2, 6, 0);
  t.m7() = 0;
  t.m8() = 0;
  SetRoadOwner(t, RoadTramType::Road, o);
  if (o != OWNER_TOWN) SetRoadOwner(t, RoadTramType::Tram, o);
  SetRoadTypes(t, road_rt, tram_rt);
}

inline void MakeRailTunnel(Tile t, Owner o, DiagDirection d, RailType r)
{
  SetTileType(t, TileType::TunnelBridge);
  SetTileOwner(t, o);
  t.m2() = 0;
  t.m3() = 0;
  t.m4() = 0;
  t.m5() = TRANSPORT_RAIL << 2 | to_underlying(d);
  SB(t.m6(), 2, 6, 0);
  t.m7() = 0;
  t.m8() = 0;
  SetRailType(t, r);
}
 
#endif /* TUNNEL_MAP_H */