mirror of https://github.com/OpenTTD/OpenTTD.git
60 lines
2.4 KiB
C++
60 lines
2.4 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file road_map.cpp Complex road accessors. */
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#include "stdafx.h"
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#include "station_map.h"
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#include "tunnelbridge_map.h"
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#include "safeguards.h"
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/**
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* Returns the RoadBits on an arbitrary tile
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* Special behaviour:
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* - road depots: entrance is treated as road piece
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* - road tunnels: entrance is treated as road piece
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* - bridge ramps: start of the ramp is treated as road piece
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* - bridge middle parts: bridge itself is ignored
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*
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* If straight_tunnel_bridge_entrance is set a ROAD_X or ROAD_Y
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* for bridge ramps and tunnel entrances is returned depending
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* on the orientation of the tunnel or bridge.
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* @param tile the tile to get the road bits for
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* @param rt the road type to get the road bits form
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* @param straight_tunnel_bridge_entrance whether to return straight road bits for tunnels/bridges.
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* @return the road bits of the given tile
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*/
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RoadBits GetAnyRoadBits(Tile tile, RoadTramType rtt, bool straight_tunnel_bridge_entrance)
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{
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if (!MayHaveRoad(tile) || !HasTileRoadType(tile, rtt)) return ROAD_NONE;
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switch (GetTileType(tile)) {
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case MP_ROAD:
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switch (GetRoadTileType(tile)) {
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default:
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case ROAD_TILE_NORMAL: return GetRoadBits(tile, rtt);
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case ROAD_TILE_CROSSING: return GetCrossingRoadBits(tile);
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case ROAD_TILE_DEPOT: return DiagDirToRoadBits(GetRoadDepotDirection(tile));
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}
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case MP_STATION:
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if (!IsRoadStopTile(tile)) return ROAD_NONE;
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if (IsDriveThroughStopTile(tile)) return (GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y;
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return DiagDirToRoadBits(GetRoadStopDir(tile));
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case MP_TUNNELBRIDGE:
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if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return ROAD_NONE;
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return straight_tunnel_bridge_entrance ?
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AxisToRoadBits(DiagDirToAxis(GetTunnelBridgeDirection(tile))) :
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DiagDirToRoadBits(ReverseDiagDir(GetTunnelBridgeDirection(tile)));
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default: return ROAD_NONE;
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}
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}
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