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/* $Id$ */
/*
* 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 engine_type.h Types related to engines. */
#ifndef ENGINE_TYPE_H
#define ENGINE_TYPE_H
#include "economy_type.h"
#include "rail_type.h"
#include "cargo_type.h"
#include "date_type.h"
#include "sound_type.h"
#include "strings_type.h"
typedef uint16 EngineID; ///< Unique identification number of an engine.
struct Engine;
/** Available types of rail vehicles. */
enum RailVehicleTypes {
RAILVEH_SINGLEHEAD, ///< indicates a "standalone" locomotive
RAILVEH_MULTIHEAD, ///< indicates a combination of two locomotives
RAILVEH_WAGON, ///< simple wagon, not motorized
};
/** Type of rail engine. */
enum EngineClass {
EC_STEAM, ///< Steam rail engine.
EC_DIESEL, ///< Diesel rail engine.
EC_ELECTRIC, ///< Electric rail engine.
EC_MONORAIL, ///< Mono rail engine.
EC_MAGLEV, ///< Maglev engine.
};
/** Information about a rail vehicle. */
struct RailVehicleInfo {
byte image_index;
RailVehicleTypes railveh_type;
byte cost_factor; ///< Purchase cost factor; For multiheaded engines the sum of both engine prices.
RailTypeByte railtype;
uint16 max_speed; ///< Maximum speed (1 unit = 1/1.6 mph = 1 km-ish/h)
uint16 power; ///< Power of engine (hp); For multiheaded engines the sum of both engine powers.
uint16 weight; ///< Weight of vehicle (tons); For multiheaded engines the weight of each single engine.
byte running_cost; ///< Running cost of engine; For multiheaded engines the sum of both running costs.
Price running_cost_class;
EngineClass engclass; ///< Class of engine for this vehicle
byte capacity; ///< Cargo capacity of vehicle; For multiheaded engines the capacity of each single engine.
byte ai_passenger_only; ///< Bit value to tell AI that this engine is for passenger use only
uint16 pow_wag_power; ///< Extra power applied to consist if wagon should be powered
byte pow_wag_weight; ///< Extra weight applied to consist if wagon should be powered
byte visual_effect; ///< Bitstuffed NewGRF visual effect data
byte shorten_factor; ///< length on main map for this type is 8 - shorten_factor
byte tractive_effort; ///< Tractive effort coefficient
byte air_drag; ///< Coefficient of air drag
byte user_def_data; ///< Property 0x25: "User-defined bit mask" Used only for (very few) NewGRF vehicles
};
/** Information about a ship vehicle. */
struct ShipVehicleInfo {
byte image_index;
byte cost_factor;
uint16 max_speed; ///< Maximum speed (1 unit = 1/3.2 mph = 0.5 km-ish/h)
uint16 capacity;
byte running_cost;
SoundID sfx;
bool old_refittable; ///< Is ship refittable; only used during initialisation. Later use EngineInfo::refit_mask.
byte visual_effect; ///< Bitstuffed NewGRF visual effect data
byte ocean_speed_frac; ///< Fraction of maximum speed for ocean tiles.
byte canal_speed_frac; ///< Fraction of maximum speed for canal/river tiles.
/** Apply ocean/canal speed fraction to a velocity */
uint ApplyWaterClassSpeedFrac(uint raw_speed, bool is_ocean) const
{
/* speed_frac == 0 means no reduction while 0xFF means reduction to 1/256. */
return raw_speed * (256 - (is_ocean ? this->ocean_speed_frac : this->canal_speed_frac)) / 256;
}
};
/**
* AircraftVehicleInfo subtypes, bitmask type.
* If bit 0 is 0 then it is a helicopter, otherwise it is a plane
* in which case bit 1 tells us whether it's a big(fast) plane or not.
*/
enum AircraftSubTypeBits {
AIR_HELI = 0,
AIR_CTOL = 1, ///< Conventional Take Off and Landing, i.e. planes
AIR_FAST = 2
};
/** Information about a aircraft vehicle. */
struct AircraftVehicleInfo {
byte image_index;
byte cost_factor;
byte running_cost;
byte subtype; ///< Type of aircraft. @see AircraftSubTypeBits
SoundID sfx;
byte acceleration;
uint16 max_speed; ///< Maximum speed (1 unit = 8 mph = 12.8 km-ish/h)
byte mail_capacity; ///< Mail capacity (bags).
uint16 passenger_capacity; ///< Passenger capacity (persons).
};
/** Information about a road vehicle. */
struct RoadVehicleInfo {
byte image_index;
byte cost_factor;
byte running_cost;
Price running_cost_class;
SoundID sfx;
uint16 max_speed; ///< Maximum speed (1 unit = 1/3.2 mph = 0.5 km-ish/h)
byte capacity;
uint8 weight; ///< Weight in 1/4t units
uint8 power; ///< Power in 10hp units
uint8 tractive_effort; ///< Coefficient of tractive effort
uint8 air_drag; ///< Coefficient of air drag
byte visual_effect; ///< Bitstuffed NewGRF visual effect data
byte shorten_factor; ///< length on main map for this type is 8 - shorten_factor
};
/**
* Information about a vehicle
* @see table/engines.h
*/
struct EngineInfo {
Date base_intro; ///< Basic date of engine introduction (without random parts).
Year lifelength; ///< Lifetime of a single vehicle
Year base_life; ///< Basic duration of engine availability (without random parts). \c 0xFF means infinite life.
byte decay_speed;
byte load_amount;
byte climates; ///< Climates supported by the engine.
CargoID cargo_type;
uint32 refit_mask;
byte refit_cost;
byte misc_flags; ///< Miscellaneous flags. @see EngineMiscFlags
byte callback_mask; ///< Bitmask of vehicle callbacks that have to be called
int8 retire_early; ///< Number of years early to retire vehicle
StringID string_id; ///< Default name of engine
uint16 cargo_age_period; ///< Number of ticks before carried cargo is aged.
};
/**
* EngineInfo.misc_flags is a bitmask, with the following values
*/
enum EngineMiscFlags {
EF_RAIL_TILTS = 0, ///< Rail vehicle tilts in curves
EF_ROAD_TRAM = 0, ///< Road vehicle is a tram/light rail vehicle
EF_USES_2CC = 1, ///< Vehicle uses two company colours
EF_RAIL_IS_MU = 2, ///< Rail vehicle is a multiple-unit (DMU/EMU)
EF_RAIL_FLIPS = 3, ///< Rail vehicle can be flipped in the depot
EF_AUTO_REFIT = 4, ///< Automatic refitting is allowed
};
/**
* Engine.flags is a bitmask, with the following values.
*/
enum EngineFlags {
ENGINE_AVAILABLE = 1, ///< This vehicle is available to everyone.
ENGINE_EXCLUSIVE_PREVIEW = 2, ///< This vehicle is in the exclusive preview stage, either being used or being offered to a company.
ENGINE_OFFER_WINDOW_OPEN = 4, ///< The exclusive offer window is currently open for a company.
};
static const uint MAX_LENGTH_ENGINE_NAME_CHARS = 32; ///< The maximum length of an engine name in characters including '\0'
static const EngineID INVALID_ENGINE = 0xFFFF; ///< Constant denoting an invalid engine.
#endif /* ENGINE_TYPE_H */
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