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Diffstat (limited to 'src/ai/api/ai_bridge.hpp')
| -rw-r--r-- | src/ai/api/ai_bridge.hpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/ai/api/ai_bridge.hpp b/src/ai/api/ai_bridge.hpp new file mode 100644 index 000000000..7bd637277 --- /dev/null +++ b/src/ai/api/ai_bridge.hpp @@ -0,0 +1,164 @@ +/* $Id$ */ + +/** @file ai_bridge.hpp Everything to query and build bridges. */ + +#ifndef AI_BRIDGE_HPP +#define AI_BRIDGE_HPP + +#include "ai_object.hpp" +#include "ai_vehicle.hpp" +#include "ai_error.hpp" + +/** + * Class that handles all bridge related functions. + */ +class AIBridge : public AIObject { +public: + /** + * All bridge related error messages. + */ + enum ErrorMessages { + /** Base for bridge related errors */ + ERR_BRIDGE_BASE = AIError::ERR_CAT_BRIDGE << AIError::ERR_CAT_BIT_SIZE, + + /** + * The bridge you want to build is not available yet, + * or it is not available for the requested length. + */ + ERR_BRIDGE_TYPE_UNAVAILABLE, // [STR_5015_CAN_T_BUILD_BRIDGE_HERE] + + /** One (or more) of the bridge head(s) ends in water. */ + ERR_BRIDGE_CANNOT_END_IN_WATER, // [STR_02A0_ENDS_OF_BRIDGE_MUST_BOTH] + + /** The bride heads need to be on the same height */ + ERR_BRIDGE_HEADS_NOT_ON_SAME_HEIGHT, // [STR_BRIDGEHEADS_NOT_SAME_HEIGHT] + }; + + static const char *GetClassName() { return "AIBridge"; } + + /** + * Checks whether the given bridge type is valid. + * @param bridge_id The bridge to check. + * @return True if and only if the bridge type is valid. + */ + static bool IsValidBridge(BridgeID bridge_id); + + /** + * Checks whether the given tile is actually a bridge start or end tile. + * @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 bridge. + */ + static bool IsBridgeTile(TileIndex tile); + + /** + * Get the name of a bridge. + * @param bridge_id The bridge to get the name of. + * @pre IsValidBridge(bridge_id). + * @return The name the bridge has. + */ + static const char *GetName(BridgeID bridge_id); + + /** + * Get the maximum speed of a bridge (in km/h). + * @param bridge_id The bridge to get the maximum speed of. + * @pre IsValidBridge(bridge_id). + * @return The maximum speed the bridge has. + */ + static int32 GetMaxSpeed(BridgeID bridge_id); + + /** + * Get the new cost of a bridge. + * @param bridge_id The bridge to get the new cost of. + * @param length The length of the bridge. + * @pre IsValidBridge(bridge_id). + * @return The new cost the bridge has. + */ + static Money GetPrice(BridgeID bridge_id, uint length); + + /** + * Get the maximum length of a bridge. + * @param bridge_id The bridge to get the maximum length of. + * @pre IsValidBridge(bridge_id). + * @returns The maximum length the bridge has. + */ + static int32 GetMaxLength(BridgeID bridge_id); + + /** + * Get the minimum length of a bridge. + * @param bridge_id The bridge to get the minimum length of. + * @pre IsValidBridge(bridge_id). + * @returns The minimum length the bridge has. + */ + static int32 GetMinLength(BridgeID bridge_id); + + /** + * Get the year in which a bridge becomes available. + * @param bridge_id The bridge to get the year of availability of. + * @pre IsValidBridge(bridge_id). + * @returns The year of availability the bridge has. + * @note Years are like 2010, -10 (10 B.C.), 1950, .. + */ + static int32 GetYearAvailable(BridgeID bridge_id); + +#ifndef DOXYGEN_SKIP + /** + * Internal function to help BuildBridge in case of road. + */ + static bool _BuildBridgeRoad1(); + + /** + * Internal function to help BuildBridge in case of road. + */ + static bool _BuildBridgeRoad2(); +#endif + + /** + * Build a bridge from one tile to the other. + * As an extra for road, this functions builds two half-pieces of road on + * each end of the bridge, making it easier for you to connect it to your + * network. + * @param vehicle_type The vehicle-type of bridge to build. + * @param bridge_id The bridge-type to build. + * @param start Where to start the bridge. + * @param end Where to end the bridge. + * @pre AIMap::IsValidTile(start). + * @pre AIMap::IsValidTile(end). + * @pre 'start' and 'end' are in a straight line, i.e. + * AIMap::GetTileX(start) == AIMap::GetTileX(end) or + * AIMap::GetTileY(start) == AIMap::GetTileY(end). + * @pre vehicle_type == AIVehicle::VEHICLE_ROAD || (vehicle_type == AIVehicle::VEHICLE_RAIL && + * AIRail::IsRailTypeAvailable(AIRail::GetCurrentRailType())) || vehicle_type == AIVehicle::VEHICLE_WATER. + * @exception AIError::ERR_ALREADY_BUILT + * @exception AIError::ERR_AREA_NOT_CLEAR + * @exception AIError::ERR_LAND_SLOPED_WRONG + * @exception AIError::ERR_VEHICLE_IN_THE_WAY + * @exception AIBridge::ERR_BRIDGE_TYPE_UNAVAILABLE + * @exception AIBridge::ERR_BRIDGE_CANNOT_END_IN_WATER + * @exception AIBridge::ERR_BRIDGE_HEADS_NOT_ON_SAME_HEIGHT + * @return Whether the bridge has been/can be build or not. + * @note No matter if the road pieces were build or not, if building the + * bridge succeeded, this function returns true. + */ + static bool BuildBridge(AIVehicle::VehicleType vehicle_type, BridgeID bridge_id, TileIndex start, TileIndex end); + + /** + * Removes a bridge, by executing it on either the start or end tile. + * @param tile An end or start tile of the bridge. + * @pre AIMap::IsValidTile(tile). + * @exception AIError::ERR_OWNED_BY_ANOTHER_COMPANY + * @return Whether the bridge has been/can be removed or not. + */ + static bool RemoveBridge(TileIndex tile); + + /** + * Get the tile that is on the other end of a bridge starting at tile. + * @param tile The tile that is an end of a bridge. + * @pre AIMap::IsValidTile(tile). + * @pre IsBridgeTile(tile). + * @return The TileIndex that is the other end of the bridge. + */ + static TileIndex GetOtherBridgeEnd(TileIndex tile); +}; + +#endif /* AI_BRIDGE_HPP */ |