Files @ r14895:fb237f7e7f5b
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Location: cpp/openttd-patchpack/source/src/ai/api/ai_engine.hpp

peter1138
(svn r19502) -Codechange: During NewGRF loading, store rail type labels in temporary data and process after loading has finished. This avoids deactivated rail vehicles being reactivated if the climate property is set after the rail type property.
/* $Id$ */

/*
 * 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 ai_engine.hpp Everything to query and build engines. */

#ifndef AI_ENGINE_HPP
#define AI_ENGINE_HPP

#include "ai_object.hpp"
#include "ai_vehicle.hpp"
#include "ai_road.hpp"
#include "ai_rail.hpp"
#include "ai_airport.hpp"

/**
 * Class that handles all engine related functions.
 */
class AIEngine : public AIObject {
public:
	static const char *GetClassName() { return "AIEngine"; }

	/**
	 * Checks whether the given engine type is valid. An engine is valid if you
	 * have at least one vehicle of this engine or it's currently buildable.
	 * @param engine_id The engine to check.
	 * @return True if and only if the engine type is valid.
	 */
	static bool IsValidEngine(EngineID engine_id);

	/**
	 * Checks whether the given engine type is buildable by you.
	 * @param engine_id The engine to check.
	 * @return True if and only if the engine type is buildable.
	 */
	static bool IsBuildable(EngineID engine_id);

	/**
	 * Get the name of an engine.
	 * @param engine_id The engine to get the name of.
	 * @pre IsValidEngine(engine_id).
	 * @return The name the engine has.
	 */
	static char *GetName(EngineID engine_id);

	/**
	 * Get the cargo-type of an engine. In case it can transport multiple cargos, it
	 *  returns the first/main.
	 * @param engine_id The engine to get the cargo-type of.
	 * @pre IsValidEngine(engine_id).
	 * @return The cargo-type of the engine.
	 */
	static CargoID GetCargoType(EngineID engine_id);

	/**
	 * Check if the cargo of an engine can be refitted to your requested. If
	 *  the engine already allows this cargo, the function also returns true.
	 *  In case of articulated vehicles the function decides whether at least one
	 *  part can carry the cargo.
	 * @param engine_id The engine to check for refitting.
	 * @param cargo_id The cargo to check for refitting.
	 * @pre IsValidEngine(engine_id).
	 * @pre AICargo::IsValidCargo(cargo_id).
	 * @return True if the engine can carry this cargo, either via refit, or
	 *  by default.
	 */
	static bool CanRefitCargo(EngineID engine_id, CargoID cargo_id);

	/**
	 * Check if the engine can pull a wagon with the given cargo.
	 * @param engine_id The engine to check.
	 * @param cargo_id The cargo to check.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_RAIL.
	 * @pre AICargo::IsValidCargo(cargo_id).
	 * @return True if the engine can pull wagons carrying this cargo.
	 * @note This function is not exhaustive; a true here does not mean
	 *  that the vehicle can pull the wagons, a false does mean it can't.
	 */
	static bool CanPullCargo(EngineID engine_id, CargoID cargo_id);

	/**
	 * Get the capacity of an engine. In case it can transport multiple cargos, it
	 *  returns the first/main.
	 * @param engine_id The engine to get the capacity of.
	 * @pre IsValidEngine(engine_id).
	 * @return The capacity of the engine.
	 */
	static int32 GetCapacity(EngineID engine_id);

	/**
	 * Get the reliability of an engine. The value is between 0 and 100, where
	 *  100 means 100% reliability (never breaks down) and 0 means 0%
	 *  reliability (you most likely don't want to buy it).
	 * @param engine_id The engine to get the reliability of.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) != AIVehicle::VT_TRAIN || !IsWagon(engine_id).
	 * @return The reliability the engine has.
	 */
	static int32 GetReliability(EngineID engine_id);

	/**
	 * Get the maximum speed of an engine.
	 * @param engine_id The engine to get the maximum speed of.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) != AIVehicle::VT_TRAIN || !IsWagon(engine_id).
	 * @return The maximum speed the engine has.
	 * @note The speed is in OpenTTD's internal speed unit.
	 *       This is mph / 1.6, which is roughly km/h.
	 *       To get km/h multiply this number by 1.00584.
	 */
	static int32 GetMaxSpeed(EngineID engine_id);

	/**
	 * Get the new cost of an engine.
	 * @param engine_id The engine to get the new cost of.
	 * @pre IsValidEngine(engine_id).
	 * @return The new cost the engine has.
	 */
	static Money GetPrice(EngineID engine_id);

	/**
	 * Get the maximum age of a brand new engine.
	 * @param engine_id The engine to get the maximum age of.
	 * @pre IsValidEngine(engine_id).
	 * @returns The maximum age of a new engine in days.
	 * @note Age is in days; divide by 366 to get per year.
	 */
	static int32 GetMaxAge(EngineID engine_id);

	/**
	 * Get the running cost of an engine.
	 * @param engine_id The engine to get the running cost of.
	 * @pre IsValidEngine(engine_id).
	 * @return The running cost of a vehicle per year.
	 * @note Cost is per year; divide by 365 to get per day.
	 */
	static Money GetRunningCost(EngineID engine_id);

	/**
	 * Get the power of an engine.
	 * @param engine_id The engine to get the power of.
	 * @pre IsValidEngine(engine_id).
	 * @pre (GetVehicleType(engine_id) == AIVehicle::VT_RAIL || GetVehicleType(engine_id) == AIVehicle::VT_ROAD) && !IsWagon(engine_id).
	 * @return The power of the engine in hp.
	 */
	static int32 GetPower(EngineID engine_id);

	/**
	 * Get the weight of an engine.
	 * @param engine_id The engine to get the weight of.
	 * @pre IsValidEngine(engine_id).
	 * @pre (GetVehicleType(engine_id) == AIVehicle::VT_RAIL || GetVehicleType(engine_id) == AIVehicle::VT_ROAD).
	 * @return The weight of the engine in metric tons.
	 */
	static int32 GetWeight(EngineID engine_id);

	/**
	 * Get the maximum tractive effort of an engine.
	 * @param engine_id The engine to get the maximum tractive effort of.
	 * @pre IsValidEngine(engine_id).
	 * @pre (GetVehicleType(engine_id) == AIVehicle::VT_RAIL || GetVehicleType(engine_id) == AIVehicle::VT_ROAD) && !IsWagon(engine_id).
	 * @return The maximum tractive effort of the engine in kN.
	 */
	static int32 GetMaxTractiveEffort(EngineID engine_id);

	/**
	 * Get the date this engine was designed.
	 * @param engine_id The engine to get the design date of.
	 * @pre IsValidEngine(engine_id).
	 * @return The date this engine was designed.
	 */
	static int32 GetDesignDate(EngineID engine_id);

	/**
	 * Get the type of an engine.
	 * @param engine_id The engine to get the type of.
	 * @pre IsValidEngine(engine_id).
	 * @return The type the engine has.
	 */
	static AIVehicle::VehicleType GetVehicleType(EngineID engine_id);

	/**
	 * Check if an engine is a wagon.
	 * @param engine_id The engine to check.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_RAIL.
	 * @return Whether or not the engine is a wagon.
	 */
	static bool IsWagon(EngineID engine_id);

	/**
	 * Check if a train vehicle can run on a RailType.
	 * @param engine_id The engine to check.
	 * @param track_rail_type The type you want to check.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_RAIL.
	 * @pre AIRail::IsRailTypeAvailable(track_rail_type).
	 * @return Whether an engine of type 'engine_id' can run on 'track_rail_type'.
	 * @note Even if a train can run on a RailType that doesn't mean that it'll be
	 *   able to power the train. Use HasPowerOnRail for that.
	 */
	static bool CanRunOnRail(EngineID engine_id, AIRail::RailType track_rail_type);

	/**
	 * Check if a train engine has power on a RailType.
	 * @param engine_id The engine to check.
	 * @param track_rail_type Another RailType.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_RAIL.
	 * @pre AIRail::IsRailTypeAvailable(track_rail_type).
	 * @return Whether an engine of type 'engine_id' has power on 'track_rail_type'.
	 */
	static bool HasPowerOnRail(EngineID engine_id, AIRail::RailType track_rail_type);

	/**
	 * Get the RoadType of the engine.
	 * @param engine_id The engine to get the RoadType of.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_ROAD.
	 * @return The RoadType the engine has.
	 */
	static AIRoad::RoadType GetRoadType(EngineID engine_id);

	/**
	 * Get the RailType of the engine.
	 * @param engine_id The engine to get the RailType of.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_RAIL.
	 * @return The RailType the engine has.
	 */
	static AIRail::RailType GetRailType(EngineID engine_id);

	/**
	 * Check if the engine is articulated.
	 * @param engine_id The engine to check.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_ROAD || GetVehicleType(engine_id) == AIVehicle::VT_RAIL.
	 * @return True if the engine is articulated.
	 */
	static bool IsArticulated(EngineID engine_id);

	/**
	 * Get the PlaneType of the engine.
	 * @param engine_id The engine to get the PlaneType of.
	 * @pre IsValidEngine(engine_id).
	 * @pre GetVehicleType(engine_id) == AIVehicle::VT_AIR.
	 * @return The PlaneType the engine has.
	 */
	static AIAirport::PlaneType GetPlaneType(EngineID engine_id);
};

#endif /* AI_ENGINE_HPP */