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/* $Id$ */

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/** @file road_map.cpp Complex road accessors. */

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#include "stdafx.h"

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#include "openttd.h"

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#include "bridge_map.h"

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#include "tile_cmd.h"

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#include "road_map.h"

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#include "tunnel_map.h"

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#include "station_map.h"

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#include "tunnelbridge_map.h"

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RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt, bool straight_tunnel_bridge_entrance)

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{

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	if (!HasTileRoadType(tile, rt)) 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, rt);

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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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TrackBits GetAnyRoadTrackBits(TileIndex tile, RoadType rt)

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{

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	/* Don't allow local authorities to build roads through road depots or road stops. */

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	if (IsRoadDepotTile(tile) || (IsTileType(tile, MP_STATION) && !IsDriveThroughStopTile(tile)) || !HasTileRoadType(tile, rt)) {

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		return TRACK_BIT_NONE;

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	}

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	return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_ROAD, RoadTypeToRoadTypes(rt)));

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}