# disaster_cmd.cpp

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    00001 /* $Id$ */
    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
    00027 #include "stdafx.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 "strings_func.h"
    00036 #include "date_func.h"
    00037 #include "viewport_func.h"
    00038 #include "vehicle_func.h"
    00039 #include "sound_func.h"
    00040 #include "effectvehicle_func.h"
    00041 #include "roadveh.h"
    00042 #include "ai/ai.hpp"
    00043 #include "company_base.h"
    00044 #include "core/random_func.hpp"
    00045 #include "core/backup_type.hpp"
    00046
    00047 #include "table/strings.h"
    00048
    00050 uint16 _disaster_delay;
    00051
    00052 enum DisasterSubType {
    00053   ST_ZEPPELINER,
    00054   ST_ZEPPELINER_SHADOW,
    00055   ST_SMALL_UFO,
    00056   ST_SMALL_UFO_SHADOW,
    00057   ST_AIRPLANE,
    00058   ST_AIRPLANE_SHADOW,
    00059   ST_HELICOPTER,
    00060   ST_HELICOPTER_SHADOW,
    00061   ST_HELICOPTER_ROTORS,
    00062   ST_BIG_UFO,
    00063   ST_BIG_UFO_SHADOW,
    00064   ST_BIG_UFO_DESTROYER,
    00065   ST_BIG_UFO_DESTROYER_SHADOW,
    00066   ST_SMALL_SUBMARINE,
    00067   ST_BIG_SUBMARINE,
    00068 };
    00069
    00070 static const uint INITIAL_DISASTER_VEHICLE_ZPOS = 135;
    00071
    00072 static void DisasterClearSquare(TileIndex tile)
    00073 {
    00074   if (EnsureNoVehicleOnGround(tile).Failed()) return;
    00075
    00076   switch (GetTileType(tile)) {
    00077     case MP_RAILWAY:
    00078       if (Company::IsHumanID(GetTileOwner(tile))) {
    00079         Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
    00080         DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00081         cur_company.Restore();
    00082
    00083         /* update signals in buffer */
    00084         UpdateSignalsInBuffer();
    00085       }
    00086       break;
    00087
    00088     case MP_HOUSE: {
    00089       Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);
    00090       DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00091       cur_company.Restore();
    00092       break;
    00093     }
    00094
    00095     case MP_TREES:
    00096     case MP_CLEAR:
    00097       DoClearSquare(tile);
    00098       break;
    00099
    00100     default:
    00101       break;
    00102   }
    00103 }
    00104
    00105 static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};
    00106 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};
    00107 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};
    00108 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};
    00109 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};
    00110 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};
    00111 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};
    00112 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};
    00113 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};
    00114
    00115 static const SpriteID * const _disaster_images[] = {
    00116   _disaster_images_1, _disaster_images_1,
    00117   _disaster_images_2, _disaster_images_2,
    00118   _disaster_images_3, _disaster_images_3,
    00119   _disaster_images_8, _disaster_images_8, _disaster_images_9,
    00120   _disaster_images_6, _disaster_images_6,
    00121   _disaster_images_7, _disaster_images_7,
    00122   _disaster_images_4, _disaster_images_5,
    00123 };
    00124
    00125 static void DisasterVehicleUpdateImage(DisasterVehicle *v)
    00126 {
    00127   SpriteID img = v->image_override;
    00128   if (img == 0) img = _disaster_images[v->subtype][v->direction];
    00129   v->cur_image = img;
    00130 }
    00131
    00136 static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, byte z, Direction direction, byte subtype)
    00137 {
    00138   v->x_pos = x;
    00139   v->y_pos = y;
    00140   v->z_pos = z;
    00141   v->tile = TileVirtXY(x, y);
    00142   v->direction = direction;
    00143   v->subtype = subtype;
    00144   v->UpdateDeltaXY(INVALID_DIR);
    00145   v->owner = OWNER_NONE;
    00146   v->vehstatus = VS_UNCLICKABLE;
    00147   v->image_override = 0;
    00148   v->current_order.Free();
    00149
    00150   DisasterVehicleUpdateImage(v);
    00151   VehicleMove(v, false);
    00152   MarkSingleVehicleDirty(v);
    00153 }
    00154
    00155 static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, byte z)
    00156 {
    00157   v->x_pos = x;
    00158   v->y_pos = y;
    00159   v->z_pos = z;
    00160   v->tile = TileVirtXY(x, y);
    00161
    00162   DisasterVehicleUpdateImage(v);
    00163   VehicleMove(v, true);
    00164
    00165   DisasterVehicle *u = v->Next();
    00166   if (u != NULL) {
    00167     int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
    00168     int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
    00169
    00170     u->x_pos = x;
    00171     u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);
    00172     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
    00173     u->z_pos = GetSlopeZ(safe_x, safe_y);
    00174     u->direction = v->direction;
    00175
    00176     DisasterVehicleUpdateImage(u);
    00177     VehicleMove(u, true);
    00178
    00179     if ((u = u->Next()) != NULL) {
    00180       u->x_pos = x;
    00181       u->y_pos = y;
    00182       u->z_pos = z + 5;
    00183       VehicleMove(u, true);
    00184     }
    00185   }
    00186 }
    00187
    00196 static bool DisasterTick_Zeppeliner(DisasterVehicle *v)
    00197 {
    00198   v->tick_counter++;
    00199
    00200   if (v->current_order.GetDestination() < 2) {
    00201     if (HasBit(v->tick_counter, 0)) return true;
    00202
    00203     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00204
    00205     SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00206
    00207     if (v->current_order.GetDestination() == 1) {
    00208       if (++v->age == 38) {
    00209         v->current_order.SetDestination(2);
    00210         v->age = 0;
    00211       }
    00212
    00213       if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_SMOKE);
    00214
    00215     } else if (v->current_order.GetDestination() == 0) {
    00216       if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00217         v->current_order.SetDestination(1);
    00218         v->age = 0;
    00219
    00220         SetDParam(0, GetStationIndex(v->tile));
    00221         AddVehicleNewsItem(STR_NEWS_DISASTER_ZEPPELIN,
    00222           NS_ACCIDENT,
    00223           v->index); // Delete the news, when the zeppelin is gone
    00224         AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCrashed(GetStationIndex(v->tile)));
    00225       }
    00226     }
    00227
    00228     if (v->y_pos >= (int)((MapSizeY() + 9) * TILE_SIZE - 1)) {
    00229       delete v;
    00230       return false;
    00231     }
    00232
    00233     return true;
    00234   }
    00235
    00236   if (v->current_order.GetDestination() > 2) {
    00237     if (++v->age <= 13320) return true;
    00238
    00239     if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00240       Station *st = Station::GetByTile(v->tile);
    00241       CLRBITS(st->airport.flags, RUNWAY_IN_block);
    00242       AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCleared(st->index));
    00243     }
    00244
    00245     SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
    00246     delete v;
    00247     return false;
    00248   }
    00249
    00250   int x = v->x_pos;
    00251   int y = v->y_pos;
    00252   byte z = GetSlopeZ(x, y);
    00253   if (z < v->z_pos) z = v->z_pos - 1;
    00254   SetDisasterVehiclePos(v, x, y, z);
    00255
    00256   if (++v->age == 1) {
    00257     CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00258     SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00259     v->image_override = SPR_BLIMP_CRASHING;
    00260   } else if (v->age == 70) {
    00261     v->image_override = SPR_BLIMP_CRASHED;
    00262   } else if (v->age <= 300) {
    00263     if (GB(v->tick_counter, 0, 3) == 0) {
    00264       uint32 r = Random();
    00265
    00266       CreateEffectVehicleRel(v,
    00267         GB(r, 0, 4) - 7,
    00268         GB(r, 4, 4) - 7,
    00269         GB(r, 8, 3) + 5,
    00270         EV_EXPLOSION_SMALL);
    00271     }
    00272   } else if (v->age == 350) {
    00273     v->current_order.SetDestination(3);
    00274     v->age = 0;
    00275   }
    00276
    00277   if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00278     SETBITS(Station::GetByTile(v->tile)->airport.flags, RUNWAY_IN_block);
    00279   }
    00280
    00281   return true;
    00282 }
    00283
    00290 static bool DisasterTick_Ufo(DisasterVehicle *v)
    00291 {
    00292   v->image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
    00293
    00294   if (v->current_order.GetDestination() == 0) {
    00295     /* Fly around randomly */
    00296     int x = TileX(v->dest_tile) * TILE_SIZE;
    00297     int y = TileY(v->dest_tile) * TILE_SIZE;
    00298     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
    00299       v->direction = GetDirectionTowards(v, x, y);
    00300       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00301       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00302       return true;
    00303     }
    00304     if (++v->age < 6) {
    00305       v->dest_tile = RandomTile();
    00306       return true;
    00307     }
    00308     v->current_order.SetDestination(1);
    00309
    00310     uint n = 0; // Total number of targetable road vehicles.
    00311     RoadVehicle *u;
    00312     FOR_ALL_ROADVEHICLES(u) {
    00313       if (u->IsFrontEngine()) n++;
    00314     }
    00315
    00316     if (n == 0) {
    00317       /* If there are no targetable road vehicles, destroy the UFO. */
    00318       delete v;
    00319       return false;
    00320     }
    00321
    00322     n = RandomRange(n); // Choose one of them.
    00323     FOR_ALL_ROADVEHICLES(u) {
    00324       /* Find (n+1)-th road vehicle. */
    00325       if (u->IsFrontEngine() && (n-- == 0)) break;
    00326     }
    00327
    00328     /* Target it. */
    00329     v->dest_tile = u->index;
    00330     v->age = 0;
    00331     return true;
    00332   } else {
    00333     /* Target a vehicle */
    00334     RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
    00335     assert(u != NULL && u->type == VEH_ROAD && u->IsFrontEngine());
    00336
    00337     uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
    00338
    00339     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
    00340       u->breakdown_ctr = 3;
    00341       u->breakdown_delay = 140;
    00342     }
    00343
    00344     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
    00345     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00346
    00347     byte z = v->z_pos;
    00348     if (dist <= TILE_SIZE && z > u->z_pos) z--;
    00349     SetDisasterVehiclePos(v, gp.x, gp.y, z);
    00350
    00351     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
    00352       v->age++;
    00353       if (u->crashed_ctr == 0) {
    00354         u->Crash();
    00355
    00356         AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO,
    00357           NS_ACCIDENT,
    00358           u->index); // delete the news, when the roadvehicle is gone
    00359
    00360         AI::NewEvent(u->owner, new AIEventVehicleCrashed(u->index, u->tile, AIEventVehicleCrashed::CRASH_RV_UFO));
    00361       }
    00362     }
    00363
    00364     /* Destroy? */
    00365     if (v->age > 50) {
    00366       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00367       SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00368       delete v;
    00369       return false;
    00370     }
    00371   }
    00372
    00373   return true;
    00374 }
    00375
    00376 static void DestructIndustry(Industry *i)
    00377 {
    00378   for (TileIndex tile = 0; tile != MapSize(); tile++) {
    00379     if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {
    00380       ResetIndustryConstructionStage(tile);
    00381       MarkTileDirtyByTile(tile);
    00382     }
    00383   }
    00384 }
    00385
    00399 static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
    00400 {
    00401   v->tick_counter++;
    00402   v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
    00403
    00404   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00405   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00406
    00407   if ((leave_at_top && gp.x < (-10 * (int)TILE_SIZE)) || (!leave_at_top && gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1)) {
    00408     delete v;
    00409     return false;
    00410   }
    00411
    00412   if (v->current_order.GetDestination() == 2) {
    00413     if (GB(v->tick_counter, 0, 2) == 0) {
    00414       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00415       int x = TileX(i->location.tile) * TILE_SIZE;
    00416       int y = TileY(i->location.tile) * TILE_SIZE;
    00417       uint32 r = Random();
    00418
    00419       CreateEffectVehicleAbove(
    00420         GB(r,  0, 6) + x,
    00421         GB(r,  6, 6) + y,
    00422         GB(r, 12, 4),
    00423         EV_EXPLOSION_SMALL);
    00424
    00425       if (++v->age >= 55) v->current_order.SetDestination(3);
    00426     }
    00427   } else if (v->current_order.GetDestination() == 1) {
    00428     if (++v->age == 112) {
    00429       v->current_order.SetDestination(2);
    00430       v->age = 0;
    00431
    00432       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00433       DestructIndustry(i);
    00434
    00435       SetDParam(0, i->town->index);
    00436       AddIndustryNewsItem(news_message, NS_ACCIDENT, i->index); // delete the news, when the industry closes
    00437       SndPlayTileFx(SND_12_EXPLOSION, i->location.tile);
    00438     }
    00439   } else if (v->current_order.GetDestination() == 0) {
    00440     int x = v->x_pos + ((leave_at_top ? -15 : 15) * TILE_SIZE);
    00441     int y = v->y_pos;
    00442
    00443     if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
    00444
    00445     TileIndex tile = TileVirtXY(x, y);
    00446     if (!IsTileType(tile, MP_INDUSTRY)) return true;
    00447
    00448     IndustryID ind = GetIndustryIndex(tile);
    00449     v->dest_tile = ind;
    00450
    00451     if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
    00452       v->current_order.SetDestination(1);
    00453       v->age = 0;
    00454     }
    00455   }
    00456
    00457   return true;
    00458 }
    00459
    00461 static bool DisasterTick_Airplane(DisasterVehicle *v)
    00462 {
    00463   return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
    00464 }
    00465
    00467 static bool DisasterTick_Helicopter(DisasterVehicle *v)
    00468 {
    00469   return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
    00470 }
    00471
    00473 static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
    00474 {
    00475   v->tick_counter++;
    00476   if (HasBit(v->tick_counter, 0)) return true;
    00477
    00478   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
    00479
    00480   VehicleMove(v, true);
    00481
    00482   return true;
    00483 }
    00484
    00491 static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
    00492 {
    00493   v->tick_counter++;
    00494
    00495   if (v->current_order.GetDestination() == 1) {
    00496     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00497     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00498     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
    00499       v->direction = GetDirectionTowards(v, x, y);
    00500
    00501       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00502       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00503       return true;
    00504     }
    00505
    00506     if (!IsValidTile(v->dest_tile)) {
    00507       /* Make sure we don't land outside the map. */
    00508       delete v;
    00509       return false;
    00510     }
    00511
    00512     byte z = GetSlopeZ(v->x_pos, v->y_pos);
    00513     if (z < v->z_pos) {
    00514       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
    00515       return true;
    00516     }
    00517
    00518     v->current_order.SetDestination(2);
    00519
    00520     Vehicle *target;
    00521     FOR_ALL_VEHICLES(target) {
    00522       if (target->IsGroundVehicle()) {
    00523         if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * (int)TILE_SIZE) {
    00524           target->breakdown_ctr = 5;
    00525           target->breakdown_delay = 0xF0;
    00526         }
    00527       }
    00528     }
    00529
    00530     Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
    00531     SetDParam(0, t->index);
    00532     AddNewsItem(STR_NEWS_DISASTER_BIG_UFO,
    00533       NS_ACCIDENT,
    00534       NR_TILE,
    00535       v->tile);
    00536
    00537     if (!Vehicle::CanAllocateItem(2)) {
    00538       delete v;
    00539       return false;
    00540     }
    00541     DisasterVehicle *u = new DisasterVehicle();
    00542
    00543     InitializeDisasterVehicle(u, -6 * (int)TILE_SIZE, v->y_pos, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_BIG_UFO_DESTROYER);
    00544     u->big_ufo_destroyer_target = v->index;
    00545
    00546     DisasterVehicle *w = new DisasterVehicle();
    00547
    00548     u->SetNext(w);
    00549     InitializeDisasterVehicle(w, -6 * (int)TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
    00550     w->vehstatus |= VS_SHADOW;
    00551   } else if (v->current_order.GetDestination() == 0) {
    00552     int x = TileX(v->dest_tile) * TILE_SIZE;
    00553     int y = TileY(v->dest_tile) * TILE_SIZE;
    00554     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
    00555       v->direction = GetDirectionTowards(v, x, y);
    00556       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00557       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00558       return true;
    00559     }
    00560
    00561     if (++v->age < 6) {
    00562       v->dest_tile = RandomTile();
    00563       return true;
    00564     }
    00565     v->current_order.SetDestination(1);
    00566
    00567     TileIndex tile_org = RandomTile();
    00568     TileIndex tile = tile_org;
    00569     do {
    00570       if (IsPlainRailTile(tile) &&
    00571           Company::IsHumanID(GetTileOwner(tile))) {
    00572         break;
    00573       }
    00574       tile = TILE_MASK(tile + 1);
    00575     } while (tile != tile_org);
    00576     v->dest_tile = tile;
    00577     v->age = 0;
    00578   }
    00579
    00580   return true;
    00581 }
    00582
    00587 static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
    00588 {
    00589   v->tick_counter++;
    00590
    00591   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00592   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00593
    00594   if (gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1) {
    00595     delete v;
    00596     return false;
    00597   }
    00598
    00599   if (v->current_order.GetDestination() == 0) {
    00600     Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
    00601     if (Delta(v->x_pos, u->x_pos) > (int)TILE_SIZE) return true;
    00602     v->current_order.SetDestination(1);
    00603
    00604     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
    00605     SndPlayVehicleFx(SND_12_EXPLOSION, u);
    00606
    00607     delete u;
    00608
    00609     for (int i = 0; i != 80; i++) {
    00610       uint32 r = Random();
    00611       CreateEffectVehicleAbove(
    00612         GB(r, 0, 6) + v->x_pos - 32,
    00613         GB(r, 5, 6) + v->y_pos - 32,
    00614         0,
    00615         EV_EXPLOSION_SMALL);
    00616     }
    00617
    00618     for (int dy = -3; dy < 3; dy++) {
    00619       for (int dx = -3; dx < 3; dx++) {
    00620         TileIndex tile = TileAddWrap(v->tile, dx, dy);
    00621         if (tile != INVALID_TILE) DisasterClearSquare(tile);
    00622       }
    00623     }
    00624   }
    00625
    00626   return true;
    00627 }
    00628
    00633 static bool DisasterTick_Submarine(DisasterVehicle *v)
    00634 {
    00635   v->tick_counter++;
    00636
    00637   if (++v->age > 8880) {
    00638     delete v;
    00639     return false;
    00640   }
    00641
    00642   if (!HasBit(v->tick_counter, 0)) return true;
    00643
    00644   TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
    00645   if (IsValidTile(tile)) {
    00646     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
    00647     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
    00648       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00649       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00650       return true;
    00651     }
    00652   }
    00653
    00654   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
    00655
    00656   return true;
    00657 }
    00658
    00659
    00660 static bool DisasterTick_NULL(DisasterVehicle *v)
    00661 {
    00662   return true;
    00663 }
    00664
    00665 typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
    00666
    00667 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
    00668   DisasterTick_Zeppeliner, DisasterTick_NULL,
    00669   DisasterTick_Ufo,        DisasterTick_NULL,
    00670   DisasterTick_Airplane,   DisasterTick_NULL,
    00671   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
    00672   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
    00673   DisasterTick_NULL,
    00674   DisasterTick_Submarine,
    00675   DisasterTick_Submarine,
    00676 };
    00677
    00678
    00679 bool DisasterVehicle::Tick()
    00680 {
    00681   return _disastervehicle_tick_procs[this->subtype](this);
    00682 }
    00683
    00684 typedef void DisasterInitProc();
    00685
    00686
    00691 static void Disaster_Zeppeliner_Init()
    00692 {
    00693   if (!Vehicle::CanAllocateItem(2)) return;
    00694
    00695   /* Pick a random place, unless we find a small airport */
    00696   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00697
    00698   Station *st;
    00699   FOR_ALL_STATIONS(st) {
    00700     if (st->airport.tile != INVALID_TILE && (st->airport.type == AT_SMALL || st->airport.type == AT_LARGE)) {
    00701       x = (TileX(st->airport.tile) + 2) * TILE_SIZE;
    00702       break;
    00703     }
    00704   }
    00705
    00706   DisasterVehicle *v = new DisasterVehicle();
    00707   InitializeDisasterVehicle(v, x, 0, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SE, ST_ZEPPELINER);
    00708
    00709   /* Allocate shadow */
    00710   DisasterVehicle *u = new DisasterVehicle();
    00711   v->SetNext(u);
    00712   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
    00713   u->vehstatus |= VS_SHADOW;
    00714 }
    00715
    00716
    00721 static void Disaster_Small_Ufo_Init()
    00722 {
    00723   if (!Vehicle::CanAllocateItem(2)) return;
    00724
    00725   DisasterVehicle *v = new DisasterVehicle();
    00726   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00727
    00728   InitializeDisasterVehicle(v, x, 0, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SE, ST_SMALL_UFO);
    00729   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00730   v->age = 0;
    00731
    00732   /* Allocate shadow */
    00733   DisasterVehicle *u = new DisasterVehicle();
    00734   v->SetNext(u);
    00735   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
    00736   u->vehstatus |= VS_SHADOW;
    00737 }
    00738
    00739
    00740 /* Combat airplane which destroys an oil refinery */
    00741 static void Disaster_Airplane_Init()
    00742 {
    00743   if (!Vehicle::CanAllocateItem(2)) return;
    00744
    00745   Industry *i, *found = NULL;
    00746
    00747   FOR_ALL_INDUSTRIES(i) {
    00748     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
    00749         (found == NULL || Chance16(1, 2))) {
    00750       found = i;
    00751     }
    00752   }
    00753
    00754   if (found == NULL) return;
    00755
    00756   DisasterVehicle *v = new DisasterVehicle();
    00757
    00758   /* Start from the bottom (south side) of the map */
    00759   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
    00760   int y = TileY(found->location.tile) * TILE_SIZE + 37;
    00761
    00762   InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_NE, ST_AIRPLANE);
    00763
    00764   DisasterVehicle *u = new DisasterVehicle();
    00765   v->SetNext(u);
    00766   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
    00767   u->vehstatus |= VS_SHADOW;
    00768 }
    00769
    00770
    00772 static void Disaster_Helicopter_Init()
    00773 {
    00774   if (!Vehicle::CanAllocateItem(3)) return;
    00775
    00776   Industry *i, *found = NULL;
    00777
    00778   FOR_ALL_INDUSTRIES(i) {
    00779     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
    00780         (found == NULL || Chance16(1, 2))) {
    00781       found = i;
    00782     }
    00783   }
    00784
    00785   if (found == NULL) return;
    00786
    00787   DisasterVehicle *v = new DisasterVehicle();
    00788
    00789   int x = -16 * (int)TILE_SIZE;
    00790   int y = TileY(found->location.tile) * TILE_SIZE + 37;
    00791
    00792   InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_HELICOPTER);
    00793
    00794   DisasterVehicle *u = new DisasterVehicle();
    00795   v->SetNext(u);
    00796   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
    00797   u->vehstatus |= VS_SHADOW;
    00798
    00799   DisasterVehicle *w = new DisasterVehicle();
    00800   u->SetNext(w);
    00801   InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
    00802 }
    00803
    00804
    00805 /* Big Ufo which lands on a piece of rail and will consequently be shot
    00806  * down by a combat airplane, destroying the surroundings */
    00807 static void Disaster_Big_Ufo_Init()
    00808 {
    00809   if (!Vehicle::CanAllocateItem(2)) return;
    00810
    00811   DisasterVehicle *v = new DisasterVehicle();
    00812   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00813   int y = MapMaxX() * TILE_SIZE - 1;
    00814
    00815   InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_NW, ST_BIG_UFO);
    00816   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00817   v->age = 0;
    00818
    00819   /* Allocate shadow */
    00820   DisasterVehicle *u = new DisasterVehicle();
    00821   v->SetNext(u);
    00822   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
    00823   u->vehstatus |= VS_SHADOW;
    00824 }
    00825
    00826
    00827 static void Disaster_Submarine_Init(DisasterSubType subtype)
    00828 {
    00829   if (!Vehicle::CanAllocateItem()) return;
    00830
    00831   int y;
    00832   Direction dir;
    00833   uint32 r = Random();
    00834   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
    00835
    00836   if (HasBit(r, 31)) {
    00837     y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
    00838     dir = DIR_NW;
    00839   } else {
    00840     y = TILE_SIZE / 2;
    00841     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
    00842     dir = DIR_SE;
    00843   }
    00844   if (!IsWaterTile(TileVirtXY(x, y))) return;
    00845
    00846   DisasterVehicle *v = new DisasterVehicle();
    00847   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
    00848   v->age = 0;
    00849 }
    00850
    00851 /* Curious submarine #1, just floats around */
    00852 static void Disaster_Small_Submarine_Init()
    00853 {
    00854   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
    00855 }
    00856
    00857
    00858 /* Curious submarine #2, just floats around */
    00859 static void Disaster_Big_Submarine_Init()
    00860 {
    00861   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
    00862 }
    00863
    00864
    00869 static void Disaster_CoalMine_Init()
    00870 {
    00871   int index = GB(Random(), 0, 4);
    00872   uint m;
    00873
    00874   for (m = 0; m < 15; m++) {
    00875     const Industry *i;
    00876
    00877     FOR_ALL_INDUSTRIES(i) {
    00878       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
    00879         SetDParam(0, i->town->index);
    00880         AddNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE,
    00881           NS_ACCIDENT, NR_TILE, i->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
    00882
    00883         {
    00884           TileIndex tile = i->location.tile;
    00885           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
    00886
    00887           for (uint n = 0; n < 30; n++) {
    00888             DisasterClearSquare(tile);
    00889             tile += step;
    00890             if (!IsValidTile(tile)) break;
    00891           }
    00892         }
    00893         return;
    00894       }
    00895     }
    00896   }
    00897 }
    00898
    00899 struct Disaster {
    00900   DisasterInitProc *init_proc;
    00901   Year min_year;
    00902   Year max_year;
    00903 };
    00904
    00905 static const Disaster _disasters[] = {
    00906   {Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
    00907   {Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
    00908   {Disaster_Airplane_Init,        1960, 1990}, // airplane
    00909   {Disaster_Helicopter_Init,      1970, 2000}, // helicopter
    00910   {Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
    00911   {Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
    00912   {Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
    00913   {Disaster_CoalMine_Init,        1950, 1985}, // coalmine
    00914 };
    00915
    00916 static void DoDisaster()
    00917 {
    00918   byte buf[lengthof(_disasters)];
    00919
    00920   byte j = 0;
    00921   for (size_t i = 0; i != lengthof(_disasters); i++) {
    00922     if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
    00923   }
    00924
    00925   if (j == 0) return;
    00926
    00927   _disasters[buf[RandomRange(j)]].init_proc();
    00928 }
    00929
    00930
    00931 static void ResetDisasterDelay()
    00932 {
    00933   _disaster_delay = GB(Random(), 0, 9) + 730;
    00934 }
    00935
    00936 void DisasterDailyLoop()
    00937 {
    00938   if (--_disaster_delay != 0) return;
    00939
    00940   ResetDisasterDelay();
    00941
    00942   if (_settings_game.difficulty.disasters != 0) DoDisaster();
    00943 }
    00944
    00945 void StartupDisasters()
    00946 {
    00947   ResetDisasterDelay();
    00948 }
    00949
    00955 void ReleaseDisastersTargetingIndustry(IndustryID i)
    00956 {
    00957   DisasterVehicle *v;
    00958   FOR_ALL_DISASTERVEHICLES(v) {
    00959     /* primary disaster vehicles that have chosen target */
    00960     if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
    00961       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
    00962       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
    00963     }
    00964   }
    00965 }
    00966
    00971 void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
    00972 {
    00973   DisasterVehicle *v;
    00974   FOR_ALL_DISASTERVEHICLES(v) {
    00975     /* primary disaster vehicles that have chosen target */
    00976     if (v->subtype == ST_SMALL_UFO) {
    00977       if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
    00978         /* Revert to target-searching */
    00979         v->current_order.SetDestination(0);
    00980         v->dest_tile = RandomTile();
    00981         v->z_pos = INITIAL_DISASTER_VEHICLE_ZPOS;
    00982         v->age = 0;
    00983       }
    00984     }
    00985   }
    00986 }
    00987
    00988 void DisasterVehicle::UpdateDeltaXY(Direction direction)
    00989 {
    00990   this->x_offs        = -1;
    00991   this->y_offs        = -1;
    00992   this->x_extent      =  2;
    00993   this->y_extent      =  2;
    00994   this->z_extent      =  5;
    00995 }