disaster_cmd.cpp

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00001 /* $Id: disaster_cmd.cpp 20995 2010-10-19 20:38:21Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00026 #include "stdafx.h"
00027 #include "landscape.h"
00028 
00029 #include "industry.h"
00030 #include "station_base.h"
00031 #include "command_func.h"
00032 #include "news_func.h"
00033 #include "town.h"
00034 #include "company_func.h"
00035 #include "variables.h"
00036 #include "strings_func.h"
00037 #include "date_func.h"
00038 #include "functions.h"
00039 #include "vehicle_func.h"
00040 #include "sound_func.h"
00041 #include "effectvehicle_func.h"
00042 #include "roadveh.h"
00043 #include "ai/ai.hpp"
00044 #include "company_base.h"
00045 #include "core/random_func.hpp"
00046 
00047 #include "table/strings.h"
00048 #include "table/sprites.h"
00049 
00050 enum DisasterSubType {
00051   ST_ZEPPELINER,
00052   ST_ZEPPELINER_SHADOW,
00053   ST_SMALL_UFO,
00054   ST_SMALL_UFO_SHADOW,
00055   ST_AIRPLANE,
00056   ST_AIRPLANE_SHADOW,
00057   ST_HELICOPTER,
00058   ST_HELICOPTER_SHADOW,
00059   ST_HELICOPTER_ROTORS,
00060   ST_BIG_UFO,
00061   ST_BIG_UFO_SHADOW,
00062   ST_BIG_UFO_DESTROYER,
00063   ST_BIG_UFO_DESTROYER_SHADOW,
00064   ST_SMALL_SUBMARINE,
00065   ST_BIG_SUBMARINE,
00066 };
00067 
00068 static void DisasterClearSquare(TileIndex tile)
00069 {
00070   if (!EnsureNoVehicleOnGround(tile)) return;
00071 
00072   switch (GetTileType(tile)) {
00073     case MP_RAILWAY:
00074       if (Company::IsHumanID(GetTileOwner(tile))) {
00075         CompanyID old_company = _current_company;
00076         _current_company = OWNER_WATER;
00077         DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
00078         _current_company = old_company;
00079 
00080         /* update signals in buffer */
00081         UpdateSignalsInBuffer();
00082       }
00083       break;
00084 
00085     case MP_HOUSE: {
00086       CompanyID old_company = _current_company;
00087       _current_company = OWNER_NONE;
00088       DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
00089       _current_company = old_company;
00090       break;
00091     }
00092 
00093     case MP_TREES:
00094     case MP_CLEAR:
00095       DoClearSquare(tile);
00096       break;
00097 
00098     default:
00099       break;
00100   }
00101 }
00102 
00103 static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};
00104 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};
00105 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};
00106 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};
00107 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};
00108 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};
00109 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};
00110 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};
00111 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};
00112 
00113 static const SpriteID * const _disaster_images[] = {
00114   _disaster_images_1, _disaster_images_1,                     
00115   _disaster_images_2, _disaster_images_2,                     
00116   _disaster_images_3, _disaster_images_3,                     
00117   _disaster_images_8, _disaster_images_8, _disaster_images_9, 
00118   _disaster_images_6, _disaster_images_6,                     
00119   _disaster_images_7, _disaster_images_7,                     
00120   _disaster_images_4, _disaster_images_5,                     
00121 };
00122 
00123 static void DisasterVehicleUpdateImage(DisasterVehicle *v)
00124 {
00125   SpriteID img = v->image_override;
00126   if (img == 0) img = _disaster_images[v->subtype][v->direction];
00127   v->cur_image = img;
00128 }
00129 
00132 static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, byte z, Direction direction, byte subtype)
00133 {
00134   v->x_pos = x;
00135   v->y_pos = y;
00136   v->z_pos = z;
00137   v->tile = TileVirtXY(x, y);
00138   v->direction = direction;
00139   v->subtype = subtype;
00140   v->UpdateDeltaXY(INVALID_DIR);
00141   v->owner = OWNER_NONE;
00142   v->vehstatus = VS_UNCLICKABLE;
00143   v->image_override = 0;
00144   v->current_order.Free();
00145 
00146   DisasterVehicleUpdateImage(v);
00147   VehicleMove(v, false);
00148   MarkSingleVehicleDirty(v);
00149 }
00150 
00151 static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, byte z)
00152 {
00153   v->x_pos = x;
00154   v->y_pos = y;
00155   v->z_pos = z;
00156   v->tile = TileVirtXY(x, y);
00157 
00158   DisasterVehicleUpdateImage(v);
00159   VehicleMove(v, true);
00160 
00161   DisasterVehicle *u = v->Next();
00162   if (u != NULL) {
00163     int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
00164     int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
00165 
00166     u->x_pos = x;
00167     u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);
00168     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
00169     u->z_pos = GetSlopeZ(safe_x, safe_y);
00170     u->direction = v->direction;
00171 
00172     DisasterVehicleUpdateImage(u);
00173     VehicleMove(u, true);
00174 
00175     if ((u = u->Next()) != NULL) {
00176       u->x_pos = x;
00177       u->y_pos = y;
00178       u->z_pos = z + 5;
00179       VehicleMove(u, true);
00180     }
00181   }
00182 }
00183 
00192 static bool DisasterTick_Zeppeliner(DisasterVehicle *v)
00193 {
00194   v->tick_counter++;
00195 
00196   if (v->current_order.GetDestination() < 2) {
00197     if (HasBit(v->tick_counter, 0)) return true;
00198 
00199     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00200 
00201     SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00202 
00203     if (v->current_order.GetDestination() == 1) {
00204       if (++v->age == 38) {
00205         v->current_order.SetDestination(2);
00206         v->age = 0;
00207       }
00208 
00209       if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_SMOKE);
00210 
00211     } else if (v->current_order.GetDestination() == 0) {
00212       if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
00213         v->current_order.SetDestination(1);
00214         v->age = 0;
00215 
00216         SetDParam(0, GetStationIndex(v->tile));
00217         AddVehicleNewsItem(STR_NEWS_DISASTER_ZEPPELIN,
00218           NS_ACCIDENT,
00219           v->index); // Delete the news, when the zeppelin is gone
00220         AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCrashed(GetStationIndex(v->tile)));
00221       }
00222     }
00223 
00224     if (v->y_pos >= ((int)MapSizeY() + 9) * TILE_SIZE - 1) {
00225       delete v;
00226       return false;
00227     }
00228 
00229     return true;
00230   }
00231 
00232   if (v->current_order.GetDestination() > 2) {
00233     if (++v->age <= 13320) return true;
00234 
00235     if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
00236       Station *st = Station::GetByTile(v->tile);
00237       CLRBITS(st->airport_flags, RUNWAY_IN_block);
00238       AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCleared(st->index));
00239     }
00240 
00241     SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
00242     delete v;
00243     return false;
00244   }
00245 
00246   int x = v->x_pos;
00247   int y = v->y_pos;
00248   byte z = GetSlopeZ(x, y);
00249   if (z < v->z_pos) z = v->z_pos - 1;
00250   SetDisasterVehiclePos(v, x, y, z);
00251 
00252   if (++v->age == 1) {
00253     CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
00254     SndPlayVehicleFx(SND_12_EXPLOSION, v);
00255     v->image_override = SPR_BLIMP_CRASHING;
00256   } else if (v->age == 70) {
00257     v->image_override = SPR_BLIMP_CRASHED;
00258   } else if (v->age <= 300) {
00259     if (GB(v->tick_counter, 0, 3) == 0) {
00260       uint32 r = Random();
00261 
00262       CreateEffectVehicleRel(v,
00263         GB(r, 0, 4) - 7,
00264         GB(r, 4, 4) - 7,
00265         GB(r, 8, 3) + 5,
00266         EV_EXPLOSION_SMALL);
00267     }
00268   } else if (v->age == 350) {
00269     v->current_order.SetDestination(3);
00270     v->age = 0;
00271   }
00272 
00273   if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
00274     SETBITS(Station::GetByTile(v->tile)->airport_flags, RUNWAY_IN_block);
00275   }
00276 
00277   return true;
00278 }
00279 
00286 static bool DisasterTick_Ufo(DisasterVehicle *v)
00287 {
00288   v->image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
00289 
00290   if (v->current_order.GetDestination() == 0) {
00291     /* Fly around randomly */
00292     int x = TileX(v->dest_tile) * TILE_SIZE;
00293     int y = TileY(v->dest_tile) * TILE_SIZE;
00294     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
00295       v->direction = GetDirectionTowards(v, x, y);
00296       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00297       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00298       return true;
00299     }
00300     if (++v->age < 6) {
00301       v->dest_tile = RandomTile();
00302       return true;
00303     }
00304     v->current_order.SetDestination(1);
00305 
00306     RoadVehicle *u;
00307     FOR_ALL_ROADVEHICLES(u) {
00308       if (u->IsRoadVehFront()) {
00309         v->dest_tile = u->index;
00310         v->age = 0;
00311         return true;
00312       }
00313     }
00314 
00315     delete v;
00316     return false;
00317   } else {
00318     /* Target a vehicle */
00319     RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
00320     assert(u != NULL && u->type == VEH_ROAD && u->IsRoadVehFront());
00321 
00322     uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
00323 
00324     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
00325       u->breakdown_ctr = 3;
00326       u->breakdown_delay = 140;
00327     }
00328 
00329     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
00330     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00331 
00332     byte z = v->z_pos;
00333     if (dist <= TILE_SIZE && z > u->z_pos) z--;
00334     SetDisasterVehiclePos(v, gp.x, gp.y, z);
00335 
00336     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
00337       v->age++;
00338       if (u->crashed_ctr == 0) {
00339         u->Crash();
00340 
00341         AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO,
00342           NS_ACCIDENT,
00343           u->index); // delete the news, when the roadvehicle is gone
00344 
00345         AI::NewEvent(u->owner, new AIEventVehicleCrashed(u->index, u->tile, AIEventVehicleCrashed::CRASH_RV_UFO));
00346       }
00347     }
00348 
00349     /* Destroy? */
00350     if (v->age > 50) {
00351       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
00352       SndPlayVehicleFx(SND_12_EXPLOSION, v);
00353       delete v;
00354       return false;
00355     }
00356   }
00357 
00358   return true;
00359 }
00360 
00361 static void DestructIndustry(Industry *i)
00362 {
00363   for (TileIndex tile = 0; tile != MapSize(); tile++) {
00364     if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {
00365       ResetIndustryConstructionStage(tile);
00366       MarkTileDirtyByTile(tile);
00367     }
00368   }
00369 }
00370 
00384 static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
00385 {
00386   v->tick_counter++;
00387   v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
00388 
00389   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00390   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00391 
00392   if ((leave_at_top && gp.x < (-10 * TILE_SIZE)) || (!leave_at_top && gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1)) {
00393     delete v;
00394     return false;
00395   }
00396 
00397   if (v->current_order.GetDestination() == 2) {
00398     if (GB(v->tick_counter, 0, 2) == 0) {
00399       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
00400       int x = TileX(i->location.tile) * TILE_SIZE;
00401       int y = TileY(i->location.tile) * TILE_SIZE;
00402       uint32 r = Random();
00403 
00404       CreateEffectVehicleAbove(
00405         GB(r,  0, 6) + x,
00406         GB(r,  6, 6) + y,
00407         GB(r, 12, 4),
00408         EV_EXPLOSION_SMALL);
00409 
00410       if (++v->age >= 55) v->current_order.SetDestination(3);
00411     }
00412   } else if (v->current_order.GetDestination() == 1) {
00413     if (++v->age == 112) {
00414       v->current_order.SetDestination(2);
00415       v->age = 0;
00416 
00417       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
00418       DestructIndustry(i);
00419 
00420       SetDParam(0, i->town->index);
00421       AddIndustryNewsItem(news_message, NS_ACCIDENT, i->index); // delete the news, when the industry closes
00422       SndPlayTileFx(SND_12_EXPLOSION, i->location.tile);
00423     }
00424   } else if (v->current_order.GetDestination() == 0) {
00425     int x = v->x_pos + ((leave_at_top ? -15 : 15) * TILE_SIZE);
00426     int y = v->y_pos;
00427 
00428     if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
00429 
00430     TileIndex tile = TileVirtXY(x, y);
00431     if (!IsTileType(tile, MP_INDUSTRY)) return true;
00432 
00433     IndustryID ind = GetIndustryIndex(tile);
00434     v->dest_tile = ind;
00435 
00436     if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
00437       v->current_order.SetDestination(1);
00438       v->age = 0;
00439     }
00440   }
00441 
00442   return true;
00443 }
00444 
00446 static bool DisasterTick_Airplane(DisasterVehicle *v)
00447 {
00448   return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
00449 }
00450 
00452 static bool DisasterTick_Helicopter(DisasterVehicle *v)
00453 {
00454   return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
00455 }
00456 
00458 static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
00459 {
00460   v->tick_counter++;
00461   if (HasBit(v->tick_counter, 0)) return true;
00462 
00463   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
00464 
00465   VehicleMove(v, true);
00466 
00467   return true;
00468 }
00469 
00476 static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
00477 {
00478   v->tick_counter++;
00479 
00480   if (v->current_order.GetDestination() == 1) {
00481     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
00482     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
00483     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
00484       v->direction = GetDirectionTowards(v, x, y);
00485 
00486       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00487       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00488       return true;
00489     }
00490 
00491     if (!IsValidTile(v->dest_tile)) {
00492       /* Make sure we don't land outside the map. */
00493       delete v;
00494       return false;
00495     }
00496 
00497     byte z = GetSlopeZ(v->x_pos, v->y_pos);
00498     if (z < v->z_pos) {
00499       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
00500       return true;
00501     }
00502 
00503     v->current_order.SetDestination(2);
00504 
00505     Vehicle *target;
00506     FOR_ALL_VEHICLES(target) {
00507       if (target->type == VEH_TRAIN || target->type == VEH_ROAD) {
00508         if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * TILE_SIZE) {
00509           target->breakdown_ctr = 5;
00510           target->breakdown_delay = 0xF0;
00511         }
00512       }
00513     }
00514 
00515     Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
00516     SetDParam(0, t->index);
00517     AddNewsItem(STR_NEWS_DISASTER_BIG_UFO,
00518       NS_ACCIDENT,
00519       NR_TILE,
00520       v->tile);
00521 
00522     if (!Vehicle::CanAllocateItem(2)) {
00523       delete v;
00524       return false;
00525     }
00526     DisasterVehicle *u = new DisasterVehicle();
00527 
00528     InitializeDisasterVehicle(u, -6 * TILE_SIZE, v->y_pos, 135, DIR_SW, ST_BIG_UFO_DESTROYER);
00529     u->big_ufo_destroyer_target = v->index;
00530 
00531     DisasterVehicle *w = new DisasterVehicle();
00532 
00533     u->SetNext(w);
00534     InitializeDisasterVehicle(w, -6 * TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
00535     w->vehstatus |= VS_SHADOW;
00536   } else if (v->current_order.GetDestination() == 0) {
00537     int x = TileX(v->dest_tile) * TILE_SIZE;
00538     int y = TileY(v->dest_tile) * TILE_SIZE;
00539     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
00540       v->direction = GetDirectionTowards(v, x, y);
00541       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00542       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00543       return true;
00544     }
00545 
00546     if (++v->age < 6) {
00547       v->dest_tile = RandomTile();
00548       return true;
00549     }
00550     v->current_order.SetDestination(1);
00551 
00552     TileIndex tile_org = RandomTile();
00553     TileIndex tile = tile_org;
00554     do {
00555       if (IsPlainRailTile(tile) &&
00556           Company::IsHumanID(GetTileOwner(tile))) {
00557         break;
00558       }
00559       tile = TILE_MASK(tile + 1);
00560     } while (tile != tile_org);
00561     v->dest_tile = tile;
00562     v->age = 0;
00563   }
00564 
00565   return true;
00566 }
00567 
00572 static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
00573 {
00574   v->tick_counter++;
00575 
00576   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00577   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00578 
00579   if (gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1) {
00580     delete v;
00581     return false;
00582   }
00583 
00584   if (v->current_order.GetDestination() == 0) {
00585     Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
00586     if (Delta(v->x_pos, u->x_pos) > TILE_SIZE) return true;
00587     v->current_order.SetDestination(1);
00588 
00589     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
00590     SndPlayVehicleFx(SND_12_EXPLOSION, u);
00591 
00592     delete u;
00593 
00594     for (int i = 0; i != 80; i++) {
00595       uint32 r = Random();
00596       CreateEffectVehicleAbove(
00597         GB(r, 0, 6) + v->x_pos - 32,
00598         GB(r, 5, 6) + v->y_pos - 32,
00599         0,
00600         EV_EXPLOSION_SMALL);
00601     }
00602 
00603     for (int dy = -3; dy < 3; dy++) {
00604       for (int dx = -3; dx < 3; dx++) {
00605         TileIndex tile = TileAddWrap(v->tile, dx, dy);
00606         if (tile != INVALID_TILE) DisasterClearSquare(tile);
00607       }
00608     }
00609   }
00610 
00611   return true;
00612 }
00613 
00618 static bool DisasterTick_Submarine(DisasterVehicle *v)
00619 {
00620   v->tick_counter++;
00621 
00622   if (++v->age > 8880) {
00623     delete v;
00624     return false;
00625   }
00626 
00627   if (!HasBit(v->tick_counter, 0)) return true;
00628 
00629   TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
00630   if (IsValidTile(tile)) {
00631     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
00632     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
00633       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00634       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00635       return true;
00636     }
00637   }
00638 
00639   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
00640 
00641   return true;
00642 }
00643 
00644 
00645 static bool DisasterTick_NULL(DisasterVehicle *v)
00646 {
00647   return true;
00648 }
00649 
00650 typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
00651 
00652 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
00653   DisasterTick_Zeppeliner, DisasterTick_NULL,
00654   DisasterTick_Ufo,        DisasterTick_NULL,
00655   DisasterTick_Airplane,   DisasterTick_NULL,
00656   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
00657   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
00658   DisasterTick_NULL,
00659   DisasterTick_Submarine,
00660   DisasterTick_Submarine,
00661 };
00662 
00663 
00664 bool DisasterVehicle::Tick()
00665 {
00666   return _disastervehicle_tick_procs[this->subtype](this);
00667 }
00668 
00669 typedef void DisasterInitProc();
00670 
00671 
00674 static void Disaster_Zeppeliner_Init()
00675 {
00676   if (!Vehicle::CanAllocateItem(2)) return;
00677 
00678   /* Pick a random place, unless we find a small airport */
00679   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00680 
00681   Station *st;
00682   FOR_ALL_STATIONS(st) {
00683     if (st->airport_tile != INVALID_TILE && (st->airport_type == AT_SMALL || st->airport_type == AT_LARGE)) {
00684       x = (TileX(st->airport_tile) + 2) * TILE_SIZE;
00685       break;
00686     }
00687   }
00688 
00689   DisasterVehicle *v = new DisasterVehicle();
00690   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_ZEPPELINER);
00691 
00692   /* Allocate shadow */
00693   DisasterVehicle *u = new DisasterVehicle();
00694   v->SetNext(u);
00695   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
00696   u->vehstatus |= VS_SHADOW;
00697 }
00698 
00699 
00702 static void Disaster_Small_Ufo_Init()
00703 {
00704   if (!Vehicle::CanAllocateItem(2)) return;
00705 
00706   DisasterVehicle *v = new DisasterVehicle();
00707   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00708 
00709   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_SMALL_UFO);
00710   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
00711   v->age = 0;
00712 
00713   /* Allocate shadow */
00714   DisasterVehicle *u = new DisasterVehicle();
00715   v->SetNext(u);
00716   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
00717   u->vehstatus |= VS_SHADOW;
00718 }
00719 
00720 
00721 /* Combat airplane which destroys an oil refinery */
00722 static void Disaster_Airplane_Init()
00723 {
00724   if (!Vehicle::CanAllocateItem(2)) return;
00725 
00726   Industry *i, *found = NULL;
00727 
00728   FOR_ALL_INDUSTRIES(i) {
00729     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
00730         (found == NULL || Chance16(1, 2))) {
00731       found = i;
00732     }
00733   }
00734 
00735   if (found == NULL) return;
00736 
00737   DisasterVehicle *v = new DisasterVehicle();
00738 
00739   /* Start from the bottom (south side) of the map */
00740   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
00741   int y = TileY(found->location.tile) * TILE_SIZE + 37;
00742 
00743   InitializeDisasterVehicle(v, x, y, 135, DIR_NE, ST_AIRPLANE);
00744 
00745   DisasterVehicle *u = new DisasterVehicle();
00746   v->SetNext(u);
00747   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
00748   u->vehstatus |= VS_SHADOW;
00749 }
00750 
00751 
00753 static void Disaster_Helicopter_Init()
00754 {
00755   if (!Vehicle::CanAllocateItem(3)) return;
00756 
00757   Industry *i, *found = NULL;
00758 
00759   FOR_ALL_INDUSTRIES(i) {
00760     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
00761         (found == NULL || Chance16(1, 2))) {
00762       found = i;
00763     }
00764   }
00765 
00766   if (found == NULL) return;
00767 
00768   DisasterVehicle *v = new DisasterVehicle();
00769 
00770   int x = -16 * TILE_SIZE;
00771   int y = TileY(found->location.tile) * TILE_SIZE + 37;
00772 
00773   InitializeDisasterVehicle(v, x, y, 135, DIR_SW, ST_HELICOPTER);
00774 
00775   DisasterVehicle *u = new DisasterVehicle();
00776   v->SetNext(u);
00777   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
00778   u->vehstatus |= VS_SHADOW;
00779 
00780   DisasterVehicle *w = new DisasterVehicle();
00781   u->SetNext(w);
00782   InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
00783 }
00784 
00785 
00786 /* Big Ufo which lands on a piece of rail and will consequently be shot
00787  * down by a combat airplane, destroying the surroundings */
00788 static void Disaster_Big_Ufo_Init()
00789 {
00790   if (!Vehicle::CanAllocateItem(2)) return;
00791 
00792   DisasterVehicle *v = new DisasterVehicle();
00793   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00794   int y = MapMaxX() * TILE_SIZE - 1;
00795 
00796   InitializeDisasterVehicle(v, x, y, 135, DIR_NW, ST_BIG_UFO);
00797   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
00798   v->age = 0;
00799 
00800   /* Allocate shadow */
00801   DisasterVehicle *u = new DisasterVehicle();
00802   v->SetNext(u);
00803   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
00804   u->vehstatus |= VS_SHADOW;
00805 }
00806 
00807 
00808 static void Disaster_Submarine_Init(DisasterSubType subtype)
00809 {
00810   if (!Vehicle::CanAllocateItem()) return;
00811 
00812   int y;
00813   Direction dir;
00814   uint32 r = Random();
00815   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
00816 
00817   if (HasBit(r, 31)) {
00818     y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
00819     dir = DIR_NW;
00820   } else {
00821     y = TILE_SIZE / 2;
00822     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
00823     dir = DIR_SE;
00824   }
00825   if (!IsWaterTile(TileVirtXY(x, y))) return;
00826 
00827   DisasterVehicle *v = new DisasterVehicle();
00828   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
00829   v->age = 0;
00830 }
00831 
00832 /* Curious submarine #1, just floats around */
00833 static void Disaster_Small_Submarine_Init()
00834 {
00835   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
00836 }
00837 
00838 
00839 /* Curious submarine #2, just floats around */
00840 static void Disaster_Big_Submarine_Init()
00841 {
00842   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
00843 }
00844 
00845 
00848 static void Disaster_CoalMine_Init()
00849 {
00850   int index = GB(Random(), 0, 4);
00851   uint m;
00852 
00853   for (m = 0; m < 15; m++) {
00854     const Industry *i;
00855 
00856     FOR_ALL_INDUSTRIES(i) {
00857       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
00858         SetDParam(0, i->town->index);
00859         AddNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE,
00860           NS_ACCIDENT, NR_TILE, i->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
00861 
00862         {
00863           TileIndex tile = i->location.tile;
00864           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
00865 
00866           for (uint n = 0; n < 30; n++) {
00867             DisasterClearSquare(tile);
00868             tile += step;
00869             if (!IsValidTile(tile)) break;
00870           }
00871         }
00872         return;
00873       }
00874     }
00875   }
00876 }
00877 
00878 struct Disaster {
00879   DisasterInitProc *init_proc; 
00880   Year min_year;               
00881   Year max_year;               
00882 };
00883 
00884 static const Disaster _disasters[] = {
00885   {Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
00886   {Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
00887   {Disaster_Airplane_Init,        1960, 1990}, // airplane
00888   {Disaster_Helicopter_Init,      1970, 2000}, // helicopter
00889   {Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
00890   {Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
00891   {Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
00892   {Disaster_CoalMine_Init,        1950, 1985}, // coalmine
00893 };
00894 
00895 static void DoDisaster()
00896 {
00897   byte buf[lengthof(_disasters)];
00898 
00899   byte j = 0;
00900   for (size_t i = 0; i != lengthof(_disasters); i++) {
00901     if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
00902   }
00903 
00904   if (j == 0) return;
00905 
00906   _disasters[buf[RandomRange(j)]].init_proc();
00907 }
00908 
00909 
00910 static void ResetDisasterDelay()
00911 {
00912   _disaster_delay = GB(Random(), 0, 9) + 730;
00913 }
00914 
00915 void DisasterDailyLoop()
00916 {
00917   if (--_disaster_delay != 0) return;
00918 
00919   ResetDisasterDelay();
00920 
00921   if (_settings_game.difficulty.disasters != 0) DoDisaster();
00922 }
00923 
00924 void StartupDisasters()
00925 {
00926   ResetDisasterDelay();
00927 }
00928 
00933 void ReleaseDisastersTargetingIndustry(IndustryID i)
00934 {
00935   DisasterVehicle *v;
00936   FOR_ALL_DISASTERVEHICLES(v) {
00937     /* primary disaster vehicles that have chosen target */
00938     if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
00939       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
00940       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
00941     }
00942   }
00943 }
00944 
00948 void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
00949 {
00950   DisasterVehicle *v;
00951   FOR_ALL_DISASTERVEHICLES(v) {
00952     /* primary disaster vehicles that have chosen target */
00953     if (v->subtype == ST_SMALL_UFO) {
00954       if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
00955         /* Revert to target-searching */
00956         v->current_order.SetDestination(0);
00957         v->dest_tile = RandomTile();
00958         v->z_pos = 135;
00959         v->age = 0;
00960       }
00961     }
00962   }
00963 }
00964 
00965 void DisasterVehicle::UpdateDeltaXY(Direction direction)
00966 {
00967   this->x_offs        = -1;
00968   this->y_offs        = -1;
00969   this->x_extent      =  2;
00970   this->y_extent      =  2;
00971   this->z_extent      =  5;
00972 }

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