# disaster_cmd.cpp File Reference

All disaster/easter egg vehicles are handled here. More...

`#include "stdafx.h"`
`#include "landscape.h"`
`#include "industry.h"`
`#include "station_base.h"`
`#include "command_func.h"`
`#include "news_func.h"`
`#include "town.h"`
`#include "company_func.h"`
`#include "variables.h"`
`#include "strings_func.h"`
`#include "date_func.h"`
`#include "functions.h"`
`#include "vehicle_func.h"`
`#include "sound_func.h"`
`#include "effectvehicle_func.h"`
`#include "roadveh.h"`
`#include "ai/ai.hpp"`
`#include "company_base.h"`
`#include "core/random_func.hpp"`
`#include "table/strings.h"`
`#include "table/sprites.h"`

Go to the source code of this file.

## Data Structures
struct | Disaster
## Typedefs
typedef bool | DisasterVehicleTickProc (DisasterVehicle *v)
typedef void | DisasterInitProc ()
## Enumerations
enum | DisasterSubType { ST_ZEPPELINER, ST_ZEPPELINER_SHADOW, ST_SMALL_UFO, ST_SMALL_UFO_SHADOW, ST_AIRPLANE, ST_AIRPLANE_SHADOW, ST_HELICOPTER, ST_HELICOPTER_SHADOW, ST_HELICOPTER_ROTORS, ST_BIG_UFO, ST_BIG_UFO_SHADOW, ST_BIG_UFO_DESTROYER, ST_BIG_UFO_DESTROYER_SHADOW, ST_SMALL_SUBMARINE, ST_BIG_SUBMARINE }
## Functions
static void | DisasterClearSquare (TileIndex tile)
static void | DisasterVehicleUpdateImage (DisasterVehicle *v)
static void | InitializeDisasterVehicle (DisasterVehicle *v, int x, int y, byte z, Direction direction, byte subtype)
| Initialize a disaster vehicle.
static void | SetDisasterVehiclePos (DisasterVehicle *v, int x, int y, byte z)
static bool | DisasterTick_Zeppeliner (DisasterVehicle *v)
| Zeppeliner handling, v->current_order.dest states: 0: Zeppeliner initialization has found a small airport, go there and crash 1: Create crash and animate falling down for extra dramatic effect 2: Create more smoke and leave debris on ground 2: Clear the runway after some time and remove crashed zeppeliner If not airport was found, only state 0 is reached until zeppeliner leaves map.
static bool | DisasterTick_Ufo (DisasterVehicle *v)
| (Small) Ufo handling, v->current_order.dest states: 0: Fly around to the middle of the map, then randomly, after a while target a road vehicle 1: Home in on a road vehicle and crash it >:) If not road vehicle was found, only state 0 is used and Ufo disappears after a while
static void | DestructIndustry (Industry *i)
static bool | DisasterTick_Aircraft (DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
| Aircraft handling, v->current_order.dest states: 0: Fly towards the targetted industry 1: If within 15 tiles, fire away rockets and destroy industry 2: Industry explosions 3: Fly out of the map If the industry was removed in the meantime just fly to the end of the map.
static bool | DisasterTick_Airplane (DisasterVehicle *v)
| Airplane handling.
static bool | DisasterTick_Helicopter (DisasterVehicle *v)
| Helicopter handling.
static bool | DisasterTick_Helicopter_Rotors (DisasterVehicle *v)
| Helicopter rotor blades; keep these spinning.
static bool | DisasterTick_Big_Ufo (DisasterVehicle *v)
| (Big) Ufo handling, v->current_order.dest states: 0: Fly around to the middle of the map, then randomly for a while and home in on a piece of rail 1: Land there and breakdown all trains in a radius of 12 tiles; and now we wait.
static bool | DisasterTick_Big_Ufo_Destroyer (DisasterVehicle *v)
| Skyranger destroying (Big) Ufo handling, v->current_order.dest states: 0: Home in on landed Ufo and shoot it down.
static bool | DisasterTick_Submarine (DisasterVehicle *v)
| Submarine, v->current_order.dest states: Unused, just float around aimlessly and pop up at different places, turning around.
static bool | DisasterTick_NULL (DisasterVehicle *v)
static void | Disaster_Zeppeliner_Init ()
| Zeppeliner which crashes on a small airport if one found, otherwise crashes on a random tile.
static void | Disaster_Small_Ufo_Init ()
| Ufo which flies around aimlessly from the middle of the map a bit until it locates a road vehicle which it targets and then destroys.
static void | Disaster_Airplane_Init ()
static void | Disaster_Helicopter_Init ()
| Combat helicopter that destroys a factory.
static void | Disaster_Big_Ufo_Init ()
static void | Disaster_Submarine_Init (DisasterSubType subtype)
static void | Disaster_Small_Submarine_Init ()
static void | Disaster_Big_Submarine_Init ()
static void | Disaster_CoalMine_Init ()
| Coal mine catastrophe, destroys a stretch of 30 tiles of land in a certain direction.
static void | DoDisaster ()
static void | ResetDisasterDelay ()
void | DisasterDailyLoop ()
void | StartupDisasters ()
void | ReleaseDisastersTargetingIndustry (IndustryID i)
| Marks all disasters targeting this industry in such a way they won't call Industry::Get(v->dest_tile) on invalid industry anymore.
void | ReleaseDisastersTargetingVehicle (VehicleID vehicle)
| Notify disasters that we are about to delete a vehicle.
## Variables
static const SpriteID | _disaster_images_1 [] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP}
static const SpriteID | _disaster_images_2 [] = {SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT}
static const SpriteID | _disaster_images_3 [] = {SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15}
static const SpriteID | _disaster_images_4 [] = {SPR_SUB_SMALL_NE, SPR_SUB_SMALL_NE, SPR_SUB_SMALL_SE, SPR_SUB_SMALL_SE, SPR_SUB_SMALL_SW, SPR_SUB_SMALL_SW, SPR_SUB_SMALL_NW, SPR_SUB_SMALL_NW}
static const SpriteID | _disaster_images_5 [] = {SPR_SUB_LARGE_NE, SPR_SUB_LARGE_NE, SPR_SUB_LARGE_SE, SPR_SUB_LARGE_SE, SPR_SUB_LARGE_SW, SPR_SUB_LARGE_SW, SPR_SUB_LARGE_NW, SPR_SUB_LARGE_NW}
static const SpriteID | _disaster_images_6 [] = {SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER}
static const SpriteID | _disaster_images_7 [] = {SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER}
static const SpriteID | _disaster_images_8 [] = {SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A}
static const SpriteID | _disaster_images_9 [] = {SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1}
static const SpriteID *const | _disaster_images []
static DisasterVehicleTickProc *const | _disastervehicle_tick_procs []
static const Disaster | _disasters []

## Detailed Description

All disaster/easter egg vehicles are handled here.

The general flow of control for the disaster vehicles is as follows:

1. Initialize the disaster in a disaster specific way (eg start position, possible target, etc.) Disaster_XXX_Init() function
2. Add a subtype to a disaster, which is an index into the function array that handles the vehicle's ticks.
3. Run the disaster vehicles each tick until their target has been reached, this happens in the DisasterTick_XXX() functions. In here, a vehicle's state is kept by v->current_order.dest variable. Each achieved sub-target will increase this value, and the last one will remove the disaster itself

Definition in file disaster_cmd.cpp.

## Function Documentation

static bool DisasterTick_Aircraft | ( | DisasterVehicle * | v,
|  | uint16 | image_override,
|  | bool | leave_at_top,
|  | StringID | news_message,
|  | IndustryBehaviour | industry_flag |
| ) |  |  | `[static]`

Aircraft handling, v->current_order.dest states: 0: Fly towards the targetted industry 1: If within 15 tiles, fire away rockets and destroy industry 2: Industry explosions 3: Fly out of the map If the industry was removed in the meantime just fly to the end of the map.

Parameters:

  | v | The disaster vehicle.
  | image_override | The image at the time the aircraft is firing.
  | leave_at_top | True iff the vehicle leaves the map at the north side.
  | news_message | The string that's used as news message.
  | industry_flag | Only attack industries that have this flag set.

Definition at line 384 of file disaster_cmd.cpp.

References GB(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem< Tpool >::Get(), GetIndustryIndex(), GetIndustrySpec(), GetNewVehiclePos(), HasBit(), DisasterVehicle::image_override, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem< Tpool >::index, IsTileType(), Industry::location, MapMaxX(), MapSizeX(), MP_INDUSTRY, NS_ACCIDENT, SetDParam(), TileArea::tile, TILE_SIZE, TileX(), TileY(), Industry::town, GetNewVehiclePosResult::x, and GetNewVehiclePosResult::y.

Referenced by DisasterTick_Airplane(), and DisasterTick_Helicopter().

static bool DisasterTick_Airplane | ( | DisasterVehicle * | v | ) | `[static]`

Airplane handling.

Definition at line 446 of file disaster_cmd.cpp.

References DisasterTick_Aircraft(), and INDUSTRYBEH_AIRPLANE_ATTACKS.

static bool DisasterTick_Big_Ufo | ( | DisasterVehicle * | v | ) | `[static]`

(Big) Ufo handling, v->current_order.dest states: 0: Fly around to the middle of the map, then randomly for a while and home in on a piece of rail 1: Land there and breakdown all trains in a radius of 12 tiles; and now we wait.

.. because as soon as the Ufo lands, a fighter jet, a Skyranger, is called to clear up the mess

Definition at line 476 of file disaster_cmd.cpp.

References AddNewsItem(), DisasterVehicle::big_ufo_destroyer_target, Delta(), DIR_SW, GetNewVehiclePos(), GetTileOwner(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem< Tpool >::index, InitializeDisasterVehicle(), IsPlainRailTile(), IsValidTile(), NR_TILE, NS_ACCIDENT, RandomTile, SetDParam(), TILE_MASK, TILE_SIZE, TileX(), TileY(), VEH_ROAD, VEH_TRAIN, GetNewVehiclePosResult::x, and GetNewVehiclePosResult::y.

static bool DisasterTick_Helicopter | ( | DisasterVehicle * | v | ) | `[static]`

Helicopter handling.

Definition at line 452 of file disaster_cmd.cpp.

References DisasterTick_Aircraft(), and INDUSTRYBEH_CHOPPER_ATTACKS.

static void InitializeDisasterVehicle | ( | DisasterVehicle * | v,
|  | int | x,
|  | int | y,
|  | byte | z,
|  | Direction | direction,
|  | byte | subtype |
| ) |  |  | `[static]`

Initialize a disaster vehicle.

These vehicles are of type VEH_DISASTER, are unclickable and owned by nobody

Definition at line 132 of file disaster_cmd.cpp.

References DisasterVehicle::image_override, INVALID_DIR, MarkSingleVehicleDirty(), OWNER_NONE, DisasterVehicle::UpdateDeltaXY(), and VehicleMove().

Referenced by Disaster_Helicopter_Init(), Disaster_Small_Ufo_Init(), Disaster_Zeppeliner_Init(), and DisasterTick_Big_Ufo().

void ReleaseDisastersTargetingIndustry | ( | IndustryID | i | ) |

Marks all disasters targeting this industry in such a way they won't call Industry::Get(v->dest_tile) on invalid industry anymore.

Parameters:

  | i | deleted industry

Definition at line 933 of file disaster_cmd.cpp.

void ReleaseDisastersTargetingVehicle | ( | VehicleID | vehicle | ) |

Notify disasters that we are about to delete a vehicle.

So make them head elsewhere.

Parameters:

  | vehicle | deleted vehicle

Definition at line 948 of file disaster_cmd.cpp.

References RandomTile.

## Variable Documentation

const SpriteID* const _disaster_images[]`[static]`

Initial value:

     {
      _disaster_images_1, _disaster_images_1,
      _disaster_images_2, _disaster_images_2,
      _disaster_images_3, _disaster_images_3,
      _disaster_images_8, _disaster_images_8, _disaster_images_9,
      _disaster_images_6, _disaster_images_6,
      _disaster_images_7, _disaster_images_7,
      _disaster_images_4, _disaster_images_5,
    }

Definition at line 113 of file disaster_cmd.cpp.

const Disaster _disasters[]`[static]`

Initial value:

     {
      {Disaster_Zeppeliner_Init,      1930, 1955},
      {Disaster_Small_Ufo_Init,       1940, 1970},
      {Disaster_Airplane_Init,        1960, 1990},
      {Disaster_Helicopter_Init,      1970, 2000},
      {Disaster_Big_Ufo_Init,         2000, 2100},
      {Disaster_Small_Submarine_Init, 1940, 1965},
      {Disaster_Big_Submarine_Init,   1975, 2010},
      {Disaster_CoalMine_Init,        1950, 1985},
    }

Definition at line 884 of file disaster_cmd.cpp.

DisasterVehicleTickProc* const _disastervehicle_tick_procs[]`[static]`

Initial value:

     {
      DisasterTick_Zeppeliner, DisasterTick_NULL,
      DisasterTick_Ufo,        DisasterTick_NULL,
      DisasterTick_Airplane,   DisasterTick_NULL,
      DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
      DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
      DisasterTick_NULL,
      DisasterTick_Submarine,
      DisasterTick_Submarine,
    }

Definition at line 652 of file disaster_cmd.cpp.