diff options
Diffstat (limited to 'src/script/api/script_tunnel.hpp')
-rw-r--r-- | src/script/api/script_tunnel.hpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/script/api/script_tunnel.hpp b/src/script/api/script_tunnel.hpp new file mode 100644 index 000000000..86def379d --- /dev/null +++ b/src/script/api/script_tunnel.hpp @@ -0,0 +1,111 @@ +/* $Id$ */ + +/* + * 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 <http://www.gnu.org/licenses/>. + */ + +/** @file script_tunnel.hpp Everything to query and build tunnels. */ + +#ifndef SCRIPT_TUNNEL_HPP +#define SCRIPT_TUNNEL_HPP + +#include "script_vehicle.hpp" + +/** + * Class that handles all tunnel related functions. + */ +class AITunnel : public AIObject { +public: + /** + * All tunnel related errors. + */ + enum ErrorMessages { + + /** Base for bridge related errors */ + ERR_TUNNEL_BASE = AIError::ERR_CAT_TUNNEL << AIError::ERR_CAT_BIT_SIZE, + + /** Can't build tunnels on water */ + ERR_TUNNEL_CANNOT_BUILD_ON_WATER, // [STR_ERROR_CAN_T_BUILD_ON_WATER] + + /** The start tile must slope either North, South, West or East */ + ERR_TUNNEL_START_SITE_UNSUITABLE, // [STR_ERROR_SITE_UNSUITABLE_FOR_TUNNEL] + + /** Another tunnel is in the way */ + ERR_TUNNEL_ANOTHER_TUNNEL_IN_THE_WAY, // [STR_ERROR_ANOTHER_TUNNEL_IN_THE_WAY] + + /** Unable to excavate land at the end to create the tunnel's exit */ + ERR_TUNNEL_END_SITE_UNSUITABLE, // [STR_ERROR_UNABLE_TO_EXCAVATE_LAND] + }; + + /** + * Check whether the tile is an entrance to a tunnel. + * @param tile The tile to check. + * @pre AIMap::IsValidTile(tile). + * @return True if and only if the tile is the beginning or end of a tunnel. + */ + static bool IsTunnelTile(TileIndex tile); + + /** + * Get the tile that exits on the other end of a (would be) tunnel starting + * at tile. If there is no 'simple' inclined slope at the start tile, + * this function will return AIMap::TILE_INVALID. + * @param tile The tile that is an entrance to a tunnel or the tile where you may want to build a tunnel. + * @pre AIMap::IsValidTile(tile). + * @return The TileIndex that is the other end of the (would be) tunnel, or + * AIMap::TILE_INVALID if no other end was found (can't build tunnel). + * @note Even if this function returns a valid tile, that is no guarantee + * that building a tunnel will succeed. Use BuildTunnel in AITestMode to + * check whether a tunnel can actually be build. + */ + static TileIndex GetOtherTunnelEnd(TileIndex tile); + +#ifndef DOXYGEN_AI_DOCS + /** + * Internal function to help BuildTunnel in case of road. + */ + static bool _BuildTunnelRoad1(); + + /** + * Internal function to help BuildTunnel in case of road. + */ + static bool _BuildTunnelRoad2(); +#endif /* DOXYGEN_AI_DOCS */ + + /** + * Builds a tunnel starting at start. The direction of the tunnel depends + * on the slope of the start tile. Tunnels can be created for either + * rails or roads; use the appropriate AIVehicle::VehicleType. + * As an extra for road, this functions builds two half-pieces of road on + * each end of the tunnel, making it easier for you to connect it to your + * network. + * @param start Where to start the tunnel. + * @param vehicle_type The vehicle-type of tunnel to build. + * @pre AIMap::IsValidTile(start). + * @pre vehicle_type == AIVehicle::VT_ROAD || (vehicle_type == AIVehicle::VT_RAIL && + * AIRail::IsRailTypeAvailable(AIRail::GetCurrentRailType())). + * @exception AIError::ERR_AREA_NOT_CLEAR + * @exception AITunnel::ERR_TUNNEL_CANNOT_BUILD_ON_WATER + * @exception AITunnel::ERR_TUNNEL_START_SITE_UNSUITABLE + * @exception AITunnel::ERR_TUNNEL_ANOTHER_TUNNEL_IN_THE_WAY + * @exception AITunnel::ERR_TUNNEL_END_SITE_UNSUITABLE + * @return Whether the tunnel has been/can be build or not. + * @note The slope of a tile can be determined by AITile::GetSlope(TileIndex). + * @note No matter if the road pieces were build or not, if building the + * tunnel succeeded, this function returns true. + */ + static bool BuildTunnel(AIVehicle::VehicleType vehicle_type, TileIndex start); + + /** + * Remove the tunnel whose entrance is located at tile. + * @param tile The tile that is an entrance to a tunnel. + * @pre AIMap::IsValidTile(tile) && IsTunnelTile(tile). + * @exception AIError::ERR_OWNED_BY_ANOTHER_COMPANY + * @return Whether the tunnel has been/can be removed or not. + */ + static bool RemoveTunnel(TileIndex tile); +}; + +#endif /* SCRIPT_TUNNEL_HPP */ |