bridge_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 BRIDGE_MAP_H
#define BRIDGE_MAP_H
 
#include "rail_map.h"
#include "road_map.h"
#include "bridge.h"
#include "water_map.h"

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

inline bool IsBridgeTile(Tile t)
{
  return IsTileType(t, TileType::TunnelBridge) && IsBridge(t);
}

inline bool IsBridgeAbove(Tile t)
{
  return GB(t.type(), 2, 2) != 0;
}

inline BridgeType GetBridgeType(Tile t)
{
  assert(IsBridgeTile(t));
  return GB(t.m6(), 2, 4);
}

inline Axis GetBridgeAxis(Tile t)
{
  assert(IsBridgeAbove(t));
  return static_cast<Axis>(GB(t.type(), 2, 2) - 1);
}
 
TileIndex GetNorthernBridgeEnd(TileIndex t);
TileIndex GetSouthernBridgeEnd(TileIndex t);
TileIndex GetOtherBridgeEnd(TileIndex t);
 
int GetBridgeHeight(TileIndex tile);
inline int GetBridgePixelHeight(TileIndex tile)
{
  return GetBridgeHeight(tile) * TILE_HEIGHT;
}

inline void ClearSingleBridgeMiddle(Tile t, Axis a)
{
  ClrBit(t.type(), 2 + to_underlying(a));
}

inline void ClearBridgeMiddle(Tile t)
{
  ClearSingleBridgeMiddle(t, Axis::X);
  ClearSingleBridgeMiddle(t, Axis::Y);
}

inline void SetBridgeMiddle(Tile t, Axis a)
{
  SetBit(t.type(), 2 + to_underlying(a));
}

inline void MakeBridgeRamp(Tile t, Owner o, BridgeType bridgetype, DiagDirection d, TransportType tt)
{
  SetTileType(t, TileType::TunnelBridge);
  SetTileOwner(t, o);
  SetDockingTile(t, false);
  t.m2() = 0;
  t.m3() = 0;
  t.m4() = 0;
  t.m5() = 1 << 7 | tt << 2 | to_underlying(d);
  SB(t.m6(), 2, 4, bridgetype);
  SB(t.m6(), 6, 2, 0);
  t.m7() = 0;
  t.m8() = 0;
}

inline void MakeRoadBridgeRamp(Tile t, Owner o, Owner owner_road, Owner owner_tram, BridgeType bridgetype, DiagDirection d, RoadType road_rt, RoadType tram_rt)
{
  MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD);
  SetRoadOwner(t, RoadTramType::Road, owner_road);
  if (owner_tram != OWNER_TOWN) SetRoadOwner(t, RoadTramType::Tram, owner_tram);
  SetRoadTypes(t, road_rt, tram_rt);
}

inline void MakeRailBridgeRamp(Tile t, Owner o, BridgeType bridgetype, DiagDirection d, RailType rt)
{
  MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL);
  SetRailType(t, rt);
}

inline void MakeAqueductBridgeRamp(Tile t, Owner o, DiagDirection d)
{
  MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER);
}
 
#endif /* BRIDGE_MAP_H */