(svn r26864) -Codechange: bring a bit more OO into the disaster vehicles

1 files changed, 0 insertions, 990 deletions

diff --git a/src/disaster_cmd.cpp b/src/disaster_cmd.cpp
deleted file mode 100644
index 1ddfbd95c..000000000
--- a/src/disaster_cmd.cpp
+++ /dev/null
@@ -1,990 +0,0 @@
-/* $Id$ */
-
-/*
- * 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 disaster_cmd.cpp
- * All disaster/easter egg vehicles are handled here.
- * The general flow of control for the disaster vehicles is as follows:
- * <ol>
- * <li>Initialize the disaster in a disaster specific way (eg start position,
- *     possible target, etc.) Disaster_XXX_Init() function
- * <li>Add a subtype to a disaster, which is an index into the function array
- *     that handles the vehicle's ticks.
- * <li>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
- * </ol>
- */
-
-
-#include "stdafx.h"
-
-#include "industry.h"
-#include "station_base.h"
-#include "command_func.h"
-#include "news_func.h"
-#include "town.h"
-#include "company_func.h"
-#include "strings_func.h"
-#include "date_func.h"
-#include "viewport_func.h"
-#include "vehicle_func.h"
-#include "sound_func.h"
-#include "effectvehicle_func.h"
-#include "roadveh.h"
-#include "ai/ai.hpp"
-#include "game/game.hpp"
-#include "company_base.h"
-#include "core/random_func.hpp"
-#include "core/backup_type.hpp"
-
-#include "table/strings.h"
-
-#include "safeguards.h"
-
-/** Delay counter for considering the next disaster. */
-uint16 _disaster_delay;
-
-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,
-};
-
-static const uint INITIAL_DISASTER_VEHICLE_ZPOS = 135; ///< Initial Z position of flying disaster vehicles.
-
-static void DisasterClearSquare(TileIndex tile)
-{
-	if (EnsureNoVehicleOnGround(tile).Failed()) return;
-
-	switch (GetTileType(tile)) {
-		case MP_RAILWAY:
-			if (Company::IsHumanID(GetTileOwner(tile)) && !IsRailDepot(tile)) {
-				Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
-				DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
-				cur_company.Restore();
-
-				/* update signals in buffer */
-				UpdateSignalsInBuffer();
-			}
-			break;
-
-		case MP_HOUSE: {
-			Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);
-			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
-			cur_company.Restore();
-			break;
-		}
-
-		case MP_TREES:
-		case MP_CLEAR:
-			DoClearSquare(tile);
-			break;
-
-		default:
-			break;
-	}
-}
-
-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[] = {
-	_disaster_images_1, _disaster_images_1,                     ///< zeppeliner and zeppeliner shadow
-	_disaster_images_2, _disaster_images_2,                     ///< small ufo and small ufo shadow
-	_disaster_images_3, _disaster_images_3,                     ///< combat aircraft and shadow
-	_disaster_images_8, _disaster_images_8, _disaster_images_9, ///< combat helicopter, shadow and rotor
-	_disaster_images_6, _disaster_images_6,                     ///< big ufo and shadow
-	_disaster_images_7, _disaster_images_7,                     ///< skyranger and shadow
-	_disaster_images_4, _disaster_images_5,                     ///< small and big submarine sprites
-};
-
-static void DisasterVehicleUpdateImage(DisasterVehicle *v)
-{
-	SpriteID img = v->image_override;
-	if (img == 0) img = _disaster_images[v->subtype][v->direction];
-	v->cur_image = img;
-}
-
-/**
- * Initialize a disaster vehicle. These vehicles are of type VEH_DISASTER, are unclickable
- * and owned by nobody
- */
-static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, int z, Direction direction, byte subtype)
-{
-	v->x_pos = x;
-	v->y_pos = y;
-	v->z_pos = z;
-	v->tile = TileVirtXY(x, y);
-	v->direction = direction;
-	v->subtype = subtype;
-	v->UpdateDeltaXY(INVALID_DIR);
-	v->owner = OWNER_NONE;
-	v->vehstatus = VS_UNCLICKABLE;
-	v->image_override = 0;
-	v->current_order.Free();
-
-	DisasterVehicleUpdateImage(v);
-	v->UpdatePositionAndViewport();
-}
-
-static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, int z)
-{
-	v->x_pos = x;
-	v->y_pos = y;
-	v->z_pos = z;
-	v->tile = TileVirtXY(x, y);
-
-	DisasterVehicleUpdateImage(v);
-	v->UpdatePositionAndViewport();
-
-	DisasterVehicle *u = v->Next();
-	if (u != NULL) {
-		int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
-		int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
-
-		u->x_pos = x;
-		u->y_pos = y - 1 - (max(z - GetSlopePixelZ(safe_x, safe_y), 0) >> 3);
-		safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
-		u->z_pos = GetSlopePixelZ(safe_x, safe_y);
-		u->direction = v->direction;
-
-		DisasterVehicleUpdateImage(u);
-		u->UpdatePositionAndViewport();
-
-		if ((u = u->Next()) != NULL) {
-			u->x_pos = x;
-			u->y_pos = y;
-			u->z_pos = z + 5;
-			u->UpdatePositionAndViewport();
-		}
-	}
-}
-
-/**
- * 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_Zeppeliner(DisasterVehicle *v)
-{
-	v->tick_counter++;
-
-	if (v->current_order.GetDestination() < 2) {
-		if (HasBit(v->tick_counter, 0)) return true;
-
-		GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-
-		SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-
-		if (v->current_order.GetDestination() == 1) {
-			if (++v->age == 38) {
-				v->current_order.SetDestination(2);
-				v->age = 0;
-			}
-
-			if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_CRASH_SMOKE);
-
-		} else if (v->current_order.GetDestination() == 0) {
-			if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
-				v->current_order.SetDestination(1);
-				v->age = 0;
-
-				SetDParam(0, GetStationIndex(v->tile));
-				AddVehicleNewsItem(STR_NEWS_DISASTER_ZEPPELIN, NT_ACCIDENT, v->index); // Delete the news, when the zeppelin is gone
-				AI::NewEvent(GetTileOwner(v->tile), new ScriptEventDisasterZeppelinerCrashed(GetStationIndex(v->tile)));
-			}
-		}
-
-		if (v->y_pos >= (int)((MapSizeY() + 9) * TILE_SIZE - 1)) {
-			delete v;
-			return false;
-		}
-
-		return true;
-	}
-
-	if (v->current_order.GetDestination() > 2) {
-		if (++v->age <= 13320) return true;
-
-		if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
-			Station *st = Station::GetByTile(v->tile);
-			CLRBITS(st->airport.flags, RUNWAY_IN_block);
-			AI::NewEvent(GetTileOwner(v->tile), new ScriptEventDisasterZeppelinerCleared(st->index));
-		}
-
-		SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
-		delete v;
-		return false;
-	}
-
-	int x = v->x_pos;
-	int y = v->y_pos;
-	int z = GetSlopePixelZ(x, y);
-	if (z < v->z_pos) z = v->z_pos - 1;
-	SetDisasterVehiclePos(v, x, y, z);
-
-	if (++v->age == 1) {
-		CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
-		if (_settings_client.sound.disaster) SndPlayVehicleFx(SND_12_EXPLOSION, v);
-		v->image_override = SPR_BLIMP_CRASHING;
-	} else if (v->age == 70) {
-		v->image_override = SPR_BLIMP_CRASHED;
-	} else if (v->age <= 300) {
-		if (GB(v->tick_counter, 0, 3) == 0) {
-			uint32 r = Random();
-
-			CreateEffectVehicleRel(v,
-				GB(r, 0, 4) - 7,
-				GB(r, 4, 4) - 7,
-				GB(r, 8, 3) + 5,
-				EV_EXPLOSION_SMALL);
-		}
-	} else if (v->age == 350) {
-		v->current_order.SetDestination(3);
-		v->age = 0;
-	}
-
-	if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
-		SETBITS(Station::GetByTile(v->tile)->airport.flags, RUNWAY_IN_block);
-	}
-
-	return true;
-}
-
-/**
- * (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 bool DisasterTick_Ufo(DisasterVehicle *v)
-{
-	v->image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
-
-	if (v->current_order.GetDestination() == 0) {
-		/* Fly around randomly */
-		int x = TileX(v->dest_tile) * TILE_SIZE;
-		int y = TileY(v->dest_tile) * TILE_SIZE;
-		if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
-			v->direction = GetDirectionTowards(v, x, y);
-			GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-			SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-			return true;
-		}
-		if (++v->age < 6) {
-			v->dest_tile = RandomTile();
-			return true;
-		}
-		v->current_order.SetDestination(1);
-
-		uint n = 0; // Total number of targetable road vehicles.
-		RoadVehicle *u;
-		FOR_ALL_ROADVEHICLES(u) {
-			if (u->IsFrontEngine()) n++;
-		}
-
-		if (n == 0) {
-			/* If there are no targetable road vehicles, destroy the UFO. */
-			delete v;
-			return false;
-		}
-
-		n = RandomRange(n); // Choose one of them.
-		FOR_ALL_ROADVEHICLES(u) {
-			/* Find (n+1)-th road vehicle. */
-			if (u->IsFrontEngine() && (n-- == 0)) break;
-		}
-
-		/* Target it. */
-		v->dest_tile = u->index;
-		v->age = 0;
-		return true;
-	} else {
-		/* Target a vehicle */
-		RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
-		assert(u != NULL && u->type == VEH_ROAD && u->IsFrontEngine());
-
-		uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
-
-		if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
-			u->breakdown_ctr = 3;
-			u->breakdown_delay = 140;
-		}
-
-		v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
-		GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-
-		int z = v->z_pos;
-		if (dist <= TILE_SIZE && z > u->z_pos) z--;
-		SetDisasterVehiclePos(v, gp.x, gp.y, z);
-
-		if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
-			v->age++;
-			if (u->crashed_ctr == 0) {
-				u->Crash();
-
-				AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO, NT_ACCIDENT, u->index); // delete the news, when the roadvehicle is gone
-
-				AI::NewEvent(u->owner, new ScriptEventVehicleCrashed(u->index, u->tile, ScriptEventVehicleCrashed::CRASH_RV_UFO));
-				Game::NewEvent(new ScriptEventVehicleCrashed(u->index, u->tile, ScriptEventVehicleCrashed::CRASH_RV_UFO));
-			}
-		}
-
-		/* Destroy? */
-		if (v->age > 50) {
-			CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
-			if (_settings_client.sound.disaster) SndPlayVehicleFx(SND_12_EXPLOSION, v);
-			delete v;
-			return false;
-		}
-	}
-
-	return true;
-}
-
-static void DestructIndustry(Industry *i)
-{
-	for (TileIndex tile = 0; tile != MapSize(); tile++) {
-		if (i->TileBelongsToIndustry(tile)) {
-			ResetIndustryConstructionStage(tile);
-			MarkTileDirtyByTile(tile);
-		}
-	}
-}
-
-/**
- * Aircraft handling, v->current_order.dest states:
- * 0: Fly towards the targeted 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.
- * @param v The disaster vehicle.
- * @param image_override The image at the time the aircraft is firing.
- * @param leave_at_top True iff the vehicle leaves the map at the north side.
- * @param news_message The string that's used as news message.
- * @param industry_flag Only attack industries that have this flag set.
- */
-static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
-{
-	v->tick_counter++;
-	v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
-
-	GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-	SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-
-	if ((leave_at_top && gp.x < (-10 * (int)TILE_SIZE)) || (!leave_at_top && gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1)) {
-		delete v;
-		return false;
-	}
-
-	if (v->current_order.GetDestination() == 2) {
-		if (GB(v->tick_counter, 0, 2) == 0) {
-			Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
-			int x = TileX(i->location.tile) * TILE_SIZE;
-			int y = TileY(i->location.tile) * TILE_SIZE;
-			uint32 r = Random();
-
-			CreateEffectVehicleAbove(
-				GB(r,  0, 6) + x,
-				GB(r,  6, 6) + y,
-				GB(r, 12, 4),
-				EV_EXPLOSION_SMALL);
-
-			if (++v->age >= 55) v->current_order.SetDestination(3);
-		}
-	} else if (v->current_order.GetDestination() == 1) {
-		if (++v->age == 112) {
-			v->current_order.SetDestination(2);
-			v->age = 0;
-
-			Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
-			DestructIndustry(i);
-
-			SetDParam(0, i->town->index);
-			AddIndustryNewsItem(news_message, NT_ACCIDENT, i->index); // delete the news, when the industry closes
-			if (_settings_client.sound.disaster) SndPlayTileFx(SND_12_EXPLOSION, i->location.tile);
-		}
-	} else if (v->current_order.GetDestination() == 0) {
-		int x = v->x_pos + ((leave_at_top ? -15 : 15) * TILE_SIZE);
-		int y = v->y_pos;
-
-		if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
-
-		TileIndex tile = TileVirtXY(x, y);
-		if (!IsTileType(tile, MP_INDUSTRY)) return true;
-
-		IndustryID ind = GetIndustryIndex(tile);
-		v->dest_tile = ind;
-
-		if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
-			v->current_order.SetDestination(1);
-			v->age = 0;
-		}
-	}
-
-	return true;
-}
-
-/** Airplane handling. */
-static bool DisasterTick_Airplane(DisasterVehicle *v)
-{
-	return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
-}
-
-/** Helicopter handling. */
-static bool DisasterTick_Helicopter(DisasterVehicle *v)
-{
-	return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
-}
-
-/** Helicopter rotor blades; keep these spinning */
-static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
-{
-	v->tick_counter++;
-	if (HasBit(v->tick_counter, 0)) return true;
-
-	if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
-
-	v->UpdatePositionAndViewport();
-
-	return true;
-}
-
-/**
- * (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
- */
-static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
-{
-	v->tick_counter++;
-
-	if (v->current_order.GetDestination() == 1) {
-		int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
-		int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
-		if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
-			v->direction = GetDirectionTowards(v, x, y);
-
-			GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-			SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-			return true;
-		}
-
-		if (!IsValidTile(v->dest_tile)) {
-			/* Make sure we don't land outside the map. */
-			delete v;
-			return false;
-		}
-
-		int z = GetSlopePixelZ(v->x_pos, v->y_pos);
-		if (z < v->z_pos) {
-			SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
-			return true;
-		}
-
-		v->current_order.SetDestination(2);
-
-		Vehicle *target;
-		FOR_ALL_VEHICLES(target) {
-			if (target->IsGroundVehicle()) {
-				if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * (int)TILE_SIZE) {
-					target->breakdown_ctr = 5;
-					target->breakdown_delay = 0xF0;
-				}
-			}
-		}
-
-		Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
-		SetDParam(0, t->index);
-		AddTileNewsItem(STR_NEWS_DISASTER_BIG_UFO, NT_ACCIDENT, v->tile);
-
-		if (!Vehicle::CanAllocateItem(2)) {
-			delete v;
-			return false;
-		}
-		DisasterVehicle *u = new DisasterVehicle();
-
-		InitializeDisasterVehicle(u, -6 * (int)TILE_SIZE, v->y_pos, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_BIG_UFO_DESTROYER);
-		u->big_ufo_destroyer_target = v->index;
-
-		DisasterVehicle *w = new DisasterVehicle();
-
-		u->SetNext(w);
-		InitializeDisasterVehicle(w, -6 * (int)TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
-		w->vehstatus |= VS_SHADOW;
-	} else if (v->current_order.GetDestination() == 0) {
-		int x = TileX(v->dest_tile) * TILE_SIZE;
-		int y = TileY(v->dest_tile) * TILE_SIZE;
-		if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
-			v->direction = GetDirectionTowards(v, x, y);
-			GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-			SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-			return true;
-		}
-
-		if (++v->age < 6) {
-			v->dest_tile = RandomTile();
-			return true;
-		}
-		v->current_order.SetDestination(1);
-
-		TileIndex tile_org = RandomTile();
-		TileIndex tile = tile_org;
-		do {
-			if (IsPlainRailTile(tile) &&
-					Company::IsHumanID(GetTileOwner(tile))) {
-				break;
-			}
-			tile = TILE_MASK(tile + 1);
-		} while (tile != tile_org);
-		v->dest_tile = tile;
-		v->age = 0;
-	}
-
-	return true;
-}
-
-/**
- * Skyranger destroying (Big) Ufo handling, v->current_order.dest states:
- * 0: Home in on landed Ufo and shoot it down
- */
-static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
-{
-	v->tick_counter++;
-
-	GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-	SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-
-	if (gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1) {
-		delete v;
-		return false;
-	}
-
-	if (v->current_order.GetDestination() == 0) {
-		Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
-		if (Delta(v->x_pos, u->x_pos) > (int)TILE_SIZE) return true;
-		v->current_order.SetDestination(1);
-
-		CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
-		if (_settings_client.sound.disaster) SndPlayVehicleFx(SND_12_EXPLOSION, u);
-
-		delete u;
-
-		for (int i = 0; i != 80; i++) {
-			uint32 r = Random();
-			CreateEffectVehicleAbove(
-				GB(r, 0, 6) + v->x_pos - 32,
-				GB(r, 5, 6) + v->y_pos - 32,
-				0,
-				EV_EXPLOSION_SMALL);
-		}
-
-		for (int dy = -3; dy < 3; dy++) {
-			for (int dx = -3; dx < 3; dx++) {
-				TileIndex tile = TileAddWrap(v->tile, dx, dy);
-				if (tile != INVALID_TILE) DisasterClearSquare(tile);
-			}
-		}
-	}
-
-	return true;
-}
-
-/**
- * Submarine, v->current_order.dest states:
- * Unused, just float around aimlessly and pop up at different places, turning around
- */
-static bool DisasterTick_Submarine(DisasterVehicle *v)
-{
-	v->tick_counter++;
-
-	if (++v->age > 8880) {
-		delete v;
-		return false;
-	}
-
-	if (!HasBit(v->tick_counter, 0)) return true;
-
-	TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
-	if (IsValidTile(tile)) {
-		TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
-		if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
-			GetNewVehiclePosResult gp = GetNewVehiclePos(v);
-			SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
-			return true;
-		}
-	}
-
-	v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
-
-	return true;
-}
-
-
-static bool DisasterTick_NULL(DisasterVehicle *v)
-{
-	return true;
-}
-
-typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
-
-static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
-	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,
-};
-
-
-bool DisasterVehicle::Tick()
-{
-	return _disastervehicle_tick_procs[this->subtype](this);
-}
-
-typedef void DisasterInitProc();
-
-
-/**
- * Zeppeliner which crashes on a small airport if one found,
- * otherwise crashes on a random tile
- */
-static void Disaster_Zeppeliner_Init()
-{
-	if (!Vehicle::CanAllocateItem(2)) return;
-
-	/* Pick a random place, unless we find a small airport */
-	int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
-
-	Station *st;
-	FOR_ALL_STATIONS(st) {
-		if (st->airport.tile != INVALID_TILE && (st->airport.type == AT_SMALL || st->airport.type == AT_LARGE)) {
-			x = (TileX(st->airport.tile) + 2) * TILE_SIZE;
-			break;
-		}
-	}
-
-	DisasterVehicle *v = new DisasterVehicle();
-	InitializeDisasterVehicle(v, x, 0, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SE, ST_ZEPPELINER);
-
-	/* Allocate shadow */
-	DisasterVehicle *u = new DisasterVehicle();
-	v->SetNext(u);
-	InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
-	u->vehstatus |= VS_SHADOW;
-}
-
-
-/**
- * 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_Small_Ufo_Init()
-{
-	if (!Vehicle::CanAllocateItem(2)) return;
-
-	DisasterVehicle *v = new DisasterVehicle();
-	int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
-
-	InitializeDisasterVehicle(v, x, 0, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SE, ST_SMALL_UFO);
-	v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
-	v->age = 0;
-
-	/* Allocate shadow */
-	DisasterVehicle *u = new DisasterVehicle();
-	v->SetNext(u);
-	InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
-	u->vehstatus |= VS_SHADOW;
-}
-
-
-/* Combat airplane which destroys an oil refinery */
-static void Disaster_Airplane_Init()
-{
-	if (!Vehicle::CanAllocateItem(2)) return;
-
-	Industry *i, *found = NULL;
-
-	FOR_ALL_INDUSTRIES(i) {
-		if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
-				(found == NULL || Chance16(1, 2))) {
-			found = i;
-		}
-	}
-
-	if (found == NULL) return;
-
-	DisasterVehicle *v = new DisasterVehicle();
-
-	/* Start from the bottom (south side) of the map */
-	int x = (MapSizeX() + 9) * TILE_SIZE - 1;
-	int y = TileY(found->location.tile) * TILE_SIZE + 37;
-
-	InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_NE, ST_AIRPLANE);
-
-	DisasterVehicle *u = new DisasterVehicle();
-	v->SetNext(u);
-	InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
-	u->vehstatus |= VS_SHADOW;
-}
-
-
-/** Combat helicopter that destroys a factory */
-static void Disaster_Helicopter_Init()
-{
-	if (!Vehicle::CanAllocateItem(3)) return;
-
-	Industry *i, *found = NULL;
-
-	FOR_ALL_INDUSTRIES(i) {
-		if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
-				(found == NULL || Chance16(1, 2))) {
-			found = i;
-		}
-	}
-
-	if (found == NULL) return;
-
-	DisasterVehicle *v = new DisasterVehicle();
-
-	int x = -16 * (int)TILE_SIZE;
-	int y = TileY(found->location.tile) * TILE_SIZE + 37;
-
-	InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_HELICOPTER);
-
-	DisasterVehicle *u = new DisasterVehicle();
-	v->SetNext(u);
-	InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
-	u->vehstatus |= VS_SHADOW;
-
-	DisasterVehicle *w = new DisasterVehicle();
-	u->SetNext(w);
-	InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
-}
-
-
-/* Big Ufo which lands on a piece of rail and will consequently be shot
- * down by a combat airplane, destroying the surroundings */
-static void Disaster_Big_Ufo_Init()
-{
-	if (!Vehicle::CanAllocateItem(2)) return;
-
-	DisasterVehicle *v = new DisasterVehicle();
-	int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
-	int y = MapMaxX() * TILE_SIZE - 1;
-
-	InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_NW, ST_BIG_UFO);
-	v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
-	v->age = 0;
-
-	/* Allocate shadow */
-	DisasterVehicle *u = new DisasterVehicle();
-	v->SetNext(u);
-	InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
-	u->vehstatus |= VS_SHADOW;
-}
-
-
-static void Disaster_Submarine_Init(DisasterSubType subtype)
-{
-	if (!Vehicle::CanAllocateItem()) return;
-
-	int y;
-	Direction dir;
-	uint32 r = Random();
-	int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
-
-	if (HasBit(r, 31)) {
-		y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
-		dir = DIR_NW;
-	} else {
-		y = TILE_SIZE / 2;
-		if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
-		dir = DIR_SE;
-	}
-	if (!IsWaterTile(TileVirtXY(x, y))) return;
-
-	DisasterVehicle *v = new DisasterVehicle();
-	InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
-	v->age = 0;
-}
-
-/* Curious submarine #1, just floats around */
-static void Disaster_Small_Submarine_Init()
-{
-	Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
-}
-
-
-/* Curious submarine #2, just floats around */
-static void Disaster_Big_Submarine_Init()
-{
-	Disaster_Submarine_Init(ST_BIG_SUBMARINE);
-}
-
-
-/**
- * Coal mine catastrophe, destroys a stretch of 30 tiles of
- * land in a certain direction
- */
-static void Disaster_CoalMine_Init()
-{
-	int index = GB(Random(), 0, 4);
-	uint m;
-
-	for (m = 0; m < 15; m++) {
-		const Industry *i;
-
-		FOR_ALL_INDUSTRIES(i) {
-			if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
-				SetDParam(0, i->town->index);
-				AddTileNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE, NT_ACCIDENT, i->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
-
-				{
-					TileIndex tile = i->location.tile;
-					TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
-
-					for (uint n = 0; n < 30; n++) {
-						DisasterClearSquare(tile);
-						tile += step;
-						if (!IsValidTile(tile)) break;
-					}
-				}
-				return;
-			}
-		}
-	}
-}
-
-struct Disaster {
-	DisasterInitProc *init_proc; ///< The init function for this disaster.
-	Year min_year;               ///< The first year this disaster will occur.
-	Year max_year;               ///< The last year this disaster will occur.
-};
-
-static const Disaster _disasters[] = {
-	{Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
-	{Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
-	{Disaster_Airplane_Init,        1960, 1990}, // airplane
-	{Disaster_Helicopter_Init,      1970, 2000}, // helicopter
-	{Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
-	{Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
-	{Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
-	{Disaster_CoalMine_Init,        1950, 1985}, // coalmine
-};
-
-static void DoDisaster()
-{
-	byte buf[lengthof(_disasters)];
-
-	byte j = 0;
-	for (size_t i = 0; i != lengthof(_disasters); i++) {
-		if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
-	}
-
-	if (j == 0) return;
-
-	_disasters[buf[RandomRange(j)]].init_proc();
-}
-
-
-static void ResetDisasterDelay()
-{
-	_disaster_delay = GB(Random(), 0, 9) + 730;
-}
-
-void DisasterDailyLoop()
-{
-	if (--_disaster_delay != 0) return;
-
-	ResetDisasterDelay();
-
-	if (_settings_game.difficulty.disasters != 0) DoDisaster();
-}
-
-void StartupDisasters()
-{
-	ResetDisasterDelay();
-}
-
-/**
- * Marks all disasters targeting this industry in such a way
- * they won't call Industry::Get(v->dest_tile) on invalid industry anymore.
- * @param i deleted industry
- */
-void ReleaseDisastersTargetingIndustry(IndustryID i)
-{
-	DisasterVehicle *v;
-	FOR_ALL_DISASTERVEHICLES(v) {
-		/* primary disaster vehicles that have chosen target */
-		if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
-			/* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
-			if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
-		}
-	}
-}
-
-/**
- * Notify disasters that we are about to delete a vehicle. So make them head elsewhere.
- * @param vehicle deleted vehicle
- */
-void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
-{
-	DisasterVehicle *v;
-	FOR_ALL_DISASTERVEHICLES(v) {
-		/* primary disaster vehicles that have chosen target */
-		if (v->subtype == ST_SMALL_UFO) {
-			if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
-				/* Revert to target-searching */
-				v->current_order.SetDestination(0);
-				v->dest_tile = RandomTile();
-				v->z_pos = INITIAL_DISASTER_VEHICLE_ZPOS;
-				v->age = 0;
-			}
-		}
-	}
-}
-
-void DisasterVehicle::UpdateDeltaXY(Direction direction)
-{
-	this->x_offs        = -1;
-	this->y_offs        = -1;
-	this->x_extent      =  2;
-	this->y_extent      =  2;
-	this->z_extent      =  5;
-}