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/* $Id$ */

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/** @file road_internal.h Functions used internally by the roads. */

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#ifndef ROAD_INTERNAL_H

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#define ROAD_INTERNAL_H

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#include "tile_cmd.h"

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/**

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 * Clean up unneccesary RoadBits of a planed tile.

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 * @param tile current tile

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 * @param org_rb planed RoadBits

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 * @return optimised RoadBits

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 */

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RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb);

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/**

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 * Is it allowed to remove the given road bits from the given tile?

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 * @param tile      the tile to remove the road from

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 * @param remove    the roadbits that are going to be removed

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 * @param owner     the actual owner of the roadbits of the tile

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 * @param edge_road are the removed bits from a town?

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 * @param rt        the road type to remove the bits from

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 * @return true when it is allowed to remove the road bits

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 */

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bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, bool *edge_road, RoadType rt);

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/**

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 * Draw the catenary for tram road bits

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 * @param ti   information about the tile (position, slope)

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 * @param tram the roadbits to draw the catenary for

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 */

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void DrawTramCatenary(TileInfo *ti, RoadBits tram);

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#endif /* ROAD_INTERNAL_H */