# 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
    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
    00045 #include "table/strings.h"
    00046 #include "table/sprites.h"
    00047
    00048 enum DisasterSubType {
    00049   ST_ZEPPELINER,
    00050   ST_ZEPPELINER_SHADOW,
    00051   ST_SMALL_UFO,
    00052   ST_SMALL_UFO_SHADOW,
    00053   ST_AIRPLANE,
    00054   ST_AIRPLANE_SHADOW,
    00055   ST_HELICOPTER,
    00056   ST_HELICOPTER_SHADOW,
    00057   ST_HELICOPTER_ROTORS,
    00058   ST_BIG_UFO,
    00059   ST_BIG_UFO_SHADOW,
    00060   ST_BIG_UFO_DESTROYER,
    00061   ST_BIG_UFO_DESTROYER_SHADOW,
    00062   ST_SMALL_SUBMARINE,
    00063   ST_BIG_SUBMARINE,
    00064 };
    00065
    00066 static void DisasterClearSquare(TileIndex tile)
    00067 {
    00068   if (!EnsureNoVehicleOnGround(tile)) return;
    00069
    00070   switch (GetTileType(tile)) {
    00071     case MP_RAILWAY:
    00072       if (Company::IsHumanID(GetTileOwner(tile))) {
    00073         CompanyID old_company = _current_company;
    00074         _current_company = OWNER_WATER;
    00075         DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00076         _current_company = old_company;
    00077
    00078         /* update signals in buffer */
    00079         UpdateSignalsInBuffer();
    00080       }
    00081       break;
    00082
    00083     case MP_HOUSE: {
    00084       CompanyID old_company = _current_company;
    00085       _current_company = OWNER_NONE;
    00086       DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00087       _current_company = old_company;
    00088       break;
    00089     }
    00090
    00091     case MP_TREES:
    00092     case MP_CLEAR:
    00093       DoClearSquare(tile);
    00094       break;
    00095
    00096     default:
    00097       break;
    00098   }
    00099 }
    00100
    00101 static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};
    00102 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};
    00103 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};
    00104 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};
    00105 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};
    00106 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};
    00107 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};
    00108 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};
    00109 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};
    00110
    00111 static const SpriteID * const _disaster_images[] = {
    00112   _disaster_images_1, _disaster_images_1,
    00113   _disaster_images_2, _disaster_images_2,
    00114   _disaster_images_3, _disaster_images_3,
    00115   _disaster_images_8, _disaster_images_8, _disaster_images_9,
    00116   _disaster_images_6, _disaster_images_6,
    00117   _disaster_images_7, _disaster_images_7,
    00118   _disaster_images_4, _disaster_images_5,
    00119 };
    00120
    00121 static void DisasterVehicleUpdateImage(DisasterVehicle *v)
    00122 {
    00123   SpriteID img = v->image_override;
    00124   if (img == 0) img = _disaster_images[v->subtype][v->direction];
    00125   v->cur_image = img;
    00126 }
    00127
    00130 static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, byte z, Direction direction, byte subtype)
    00131 {
    00132   v->x_pos = x;
    00133   v->y_pos = y;
    00134   v->z_pos = z;
    00135   v->tile = TileVirtXY(x, y);
    00136   v->direction = direction;
    00137   v->subtype = subtype;
    00138   v->UpdateDeltaXY(INVALID_DIR);
    00139   v->owner = OWNER_NONE;
    00140   v->vehstatus = VS_UNCLICKABLE;
    00141   v->image_override = 0;
    00142   v->current_order.Free();
    00143
    00144   DisasterVehicleUpdateImage(v);
    00145   VehicleMove(v, false);
    00146   MarkSingleVehicleDirty(v);
    00147 }
    00148
    00149 static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, byte z)
    00150 {
    00151   v->x_pos = x;
    00152   v->y_pos = y;
    00153   v->z_pos = z;
    00154   v->tile = TileVirtXY(x, y);
    00155
    00156   DisasterVehicleUpdateImage(v);
    00157   VehicleMove(v, true);
    00158
    00159   DisasterVehicle *u = v->Next();
    00160   if (u != NULL) {
    00161     int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
    00162     int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
    00163
    00164     u->x_pos = x;
    00165     u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);
    00166     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
    00167     u->z_pos = GetSlopeZ(safe_x, safe_y);
    00168     u->direction = v->direction;
    00169
    00170     DisasterVehicleUpdateImage(u);
    00171     VehicleMove(u, true);
    00172
    00173     if ((u = u->Next()) != NULL) {
    00174       u->x_pos = x;
    00175       u->y_pos = y;
    00176       u->z_pos = z + 5;
    00177       VehicleMove(u, true);
    00178     }
    00179   }
    00180 }
    00181
    00190 static bool DisasterTick_Zeppeliner(DisasterVehicle *v)
    00191 {
    00192   v->tick_counter++;
    00193
    00194   if (v->current_order.GetDestination() < 2) {
    00195     if (HasBit(v->tick_counter, 0)) return true;
    00196
    00197     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00198
    00199     SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00200
    00201     if (v->current_order.GetDestination() == 1) {
    00202       if (++v->age == 38) {
    00203         v->current_order.SetDestination(2);
    00204         v->age = 0;
    00205       }
    00206
    00207       if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_SMOKE);
    00208
    00209     } else if (v->current_order.GetDestination() == 0) {
    00210       if (IsValidTile(v->tile) &&
    00211           IsTileType(v->tile, MP_STATION) &&
    00212           IsAirport(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) &&
    00236         IsTileType(v->tile, MP_STATION) &&
    00237         IsAirport(v->tile)) {
    00238       Station *st = Station::GetByTile(v->tile);
    00239       CLRBITS(st->airport_flags, RUNWAY_IN_block);
    00240       AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCleared(st->index));
    00241     }
    00242
    00243     SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
    00244     delete v;
    00245     return false;
    00246   }
    00247
    00248   int x = v->x_pos;
    00249   int y = v->y_pos;
    00250   byte z = GetSlopeZ(x, y);
    00251   if (z < v->z_pos) z = v->z_pos - 1;
    00252   SetDisasterVehiclePos(v, x, y, z);
    00253
    00254   if (++v->age == 1) {
    00255     CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00256     SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00257     v->image_override = SPR_BLIMP_CRASHING;
    00258   } else if (v->age == 70) {
    00259     v->image_override = SPR_BLIMP_CRASHED;
    00260   } else if (v->age <= 300) {
    00261     if (GB(v->tick_counter, 0, 3) == 0) {
    00262       uint32 r = Random();
    00263
    00264       CreateEffectVehicleRel(v,
    00265         GB(r, 0, 4) - 7,
    00266         GB(r, 4, 4) - 7,
    00267         GB(r, 8, 3) + 5,
    00268         EV_EXPLOSION_SMALL);
    00269     }
    00270   } else if (v->age == 350) {
    00271     v->current_order.SetDestination(3);
    00272     v->age = 0;
    00273   }
    00274
    00275   if (IsValidTile(v->tile) &&
    00276       IsTileType(v->tile, MP_STATION) &&
    00277       IsAirport(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) >= 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     RoadVehicle *u;
    00311     FOR_ALL_ROADVEHICLES(u) {
    00312       if (u->IsRoadVehFront()) {
    00313         v->dest_tile = u->index;
    00314         v->age = 0;
    00315         return true;
    00316       }
    00317     }
    00318
    00319     delete v;
    00320     return false;
    00321   } else {
    00322     /* Target a vehicle */
    00323     RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
    00324     assert(u != NULL && u->type == VEH_ROAD && u->IsRoadVehFront());
    00325
    00326     uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
    00327
    00328     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
    00329       u->breakdown_ctr = 3;
    00330       u->breakdown_delay = 140;
    00331     }
    00332
    00333     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
    00334     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00335
    00336     byte z = v->z_pos;
    00337     if (dist <= TILE_SIZE && z > u->z_pos) z--;
    00338     SetDisasterVehiclePos(v, gp.x, gp.y, z);
    00339
    00340     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
    00341       v->age++;
    00342       if (u->crashed_ctr == 0) {
    00343         u->Crash();
    00344
    00345         AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO,
    00346           NS_ACCIDENT,
    00347           u->index); // delete the news, when the roadvehicle is gone
    00348
    00349         AI::NewEvent(u->owner, new AIEventVehicleCrashed(u->index, u->tile, AIEventVehicleCrashed::CRASH_RV_UFO));
    00350       }
    00351     }
    00352
    00353     /* Destroy? */
    00354     if (v->age > 50) {
    00355       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00356       SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00357       delete v;
    00358       return false;
    00359     }
    00360   }
    00361
    00362   return true;
    00363 }
    00364
    00365 static void DestructIndustry(Industry *i)
    00366 {
    00367   for (TileIndex tile = 0; tile != MapSize(); tile++) {
    00368     if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {
    00369       ResetIndustryConstructionStage(tile);
    00370       MarkTileDirtyByTile(tile);
    00371     }
    00372   }
    00373 }
    00374
    00388 static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
    00389 {
    00390   v->tick_counter++;
    00391   v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
    00392
    00393   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00394   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00395
    00396   if ((leave_at_top && gp.x < (-10 * TILE_SIZE)) || (!leave_at_top && gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1)) {
    00397     delete v;
    00398     return false;
    00399   }
    00400
    00401   if (v->current_order.GetDestination() == 2) {
    00402     if (GB(v->tick_counter, 0, 2) == 0) {
    00403       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00404       int x = TileX(i->xy) * TILE_SIZE;
    00405       int y = TileY(i->xy) * TILE_SIZE;
    00406       uint32 r = Random();
    00407
    00408       CreateEffectVehicleAbove(
    00409         GB(r,  0, 6) + x,
    00410         GB(r,  6, 6) + y,
    00411         GB(r, 12, 4),
    00412         EV_EXPLOSION_SMALL);
    00413
    00414       if (++v->age >= 55) v->current_order.SetDestination(3);
    00415     }
    00416   } else if (v->current_order.GetDestination() == 1) {
    00417     if (++v->age == 112) {
    00418       v->current_order.SetDestination(2);
    00419       v->age = 0;
    00420
    00421       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00422       DestructIndustry(i);
    00423
    00424       SetDParam(0, i->town->index);
    00425       AddIndustryNewsItem(news_message, NS_ACCIDENT, i->index); // delete the news, when the industry closes
    00426       SndPlayTileFx(SND_12_EXPLOSION, i->xy);
    00427     }
    00428   } else if (v->current_order.GetDestination() == 0) {
    00429     int x = v->x_pos - (15 * TILE_SIZE);
    00430     int y = v->y_pos;
    00431
    00432     if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
    00433
    00434     TileIndex tile = TileVirtXY(x, y);
    00435     if (!IsTileType(tile, MP_INDUSTRY)) return true;
    00436
    00437     IndustryID ind = GetIndustryIndex(tile);
    00438     v->dest_tile = ind;
    00439
    00440     if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
    00441       v->current_order.SetDestination(1);
    00442       v->age = 0;
    00443     }
    00444   }
    00445
    00446   return true;
    00447 }
    00448
    00450 static bool DisasterTick_Airplane(DisasterVehicle *v)
    00451 {
    00452   return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
    00453 }
    00454
    00456 static bool DisasterTick_Helicopter(DisasterVehicle *v)
    00457 {
    00458   return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
    00459 }
    00460
    00462 static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
    00463 {
    00464   v->tick_counter++;
    00465   if (HasBit(v->tick_counter, 0)) return true;
    00466
    00467   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
    00468
    00469   VehicleMove(v, true);
    00470
    00471   return true;
    00472 }
    00473
    00480 static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
    00481 {
    00482   v->tick_counter++;
    00483
    00484   if (v->current_order.GetDestination() == 1) {
    00485     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00486     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00487     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
    00488       v->direction = GetDirectionTowards(v, x, y);
    00489
    00490       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00491       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00492       return true;
    00493     }
    00494
    00495     if (!IsValidTile(v->dest_tile)) {
    00496       /* Make sure we don't land outside the map. */
    00497       delete v;
    00498       return false;
    00499     }
    00500
    00501     byte z = GetSlopeZ(v->x_pos, v->y_pos);
    00502     if (z < v->z_pos) {
    00503       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
    00504       return true;
    00505     }
    00506
    00507     v->current_order.SetDestination(2);
    00508
    00509     Vehicle *target;
    00510     FOR_ALL_VEHICLES(target) {
    00511       if (target->type == VEH_TRAIN || target->type == VEH_ROAD) {
    00512         if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * TILE_SIZE) {
    00513           target->breakdown_ctr = 5;
    00514           target->breakdown_delay = 0xF0;
    00515         }
    00516       }
    00517     }
    00518
    00519     Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
    00520     SetDParam(0, t->index);
    00521     AddNewsItem(STR_NEWS_DISASTER_BIG_UFO,
    00522       NS_ACCIDENT,
    00523       NR_TILE,
    00524       v->tile);
    00525
    00526     if (!Vehicle::CanAllocateItem(2)) {
    00527       delete v;
    00528       return false;
    00529     }
    00530     DisasterVehicle *u = new DisasterVehicle();
    00531
    00532     InitializeDisasterVehicle(u, -6 * TILE_SIZE, v->y_pos, 135, DIR_SW, ST_BIG_UFO_DESTROYER);
    00533     u->big_ufo_destroyer_target = v->index;
    00534
    00535     DisasterVehicle *w = new DisasterVehicle();
    00536
    00537     u->SetNext(w);
    00538     InitializeDisasterVehicle(w, -6 * TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
    00539     w->vehstatus |= VS_SHADOW;
    00540   } else if (v->current_order.GetDestination() == 0) {
    00541     int x = TileX(v->dest_tile) * TILE_SIZE;
    00542     int y = TileY(v->dest_tile) * TILE_SIZE;
    00543     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
    00544       v->direction = GetDirectionTowards(v, x, y);
    00545       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00546       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00547       return true;
    00548     }
    00549
    00550     if (++v->age < 6) {
    00551       v->dest_tile = RandomTile();
    00552       return true;
    00553     }
    00554     v->current_order.SetDestination(1);
    00555
    00556     TileIndex tile_org = RandomTile();
    00557     TileIndex tile = tile_org;
    00558     do {
    00559       if (IsPlainRailTile(tile) &&
    00560           Company::IsHumanID(GetTileOwner(tile))) {
    00561         break;
    00562       }
    00563       tile = TILE_MASK(tile + 1);
    00564     } while (tile != tile_org);
    00565     v->dest_tile = tile;
    00566     v->age = 0;
    00567   }
    00568
    00569   return true;
    00570 }
    00571
    00576 static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
    00577 {
    00578   v->tick_counter++;
    00579
    00580   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00581   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00582
    00583   if (gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1) {
    00584     delete v;
    00585     return false;
    00586   }
    00587
    00588   if (v->current_order.GetDestination() == 0) {
    00589     Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
    00590     if (Delta(v->x_pos, u->x_pos) > TILE_SIZE) return true;
    00591     v->current_order.SetDestination(1);
    00592
    00593     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
    00594     SndPlayVehicleFx(SND_12_EXPLOSION, u);
    00595
    00596     delete u;
    00597
    00598     for (int i = 0; i != 80; i++) {
    00599       uint32 r = Random();
    00600       CreateEffectVehicleAbove(
    00601         GB(r, 0, 6) + v->x_pos - 32,
    00602         GB(r, 5, 6) + v->y_pos - 32,
    00603         0,
    00604         EV_EXPLOSION_SMALL);
    00605     }
    00606
    00607     for (int dy = -3; dy < 3; dy++) {
    00608       for (int dx = -3; dx < 3; dx++) {
    00609         TileIndex tile = TileAddWrap(v->tile, dx, dy);
    00610         if (tile != INVALID_TILE) DisasterClearSquare(tile);
    00611       }
    00612     }
    00613   }
    00614
    00615   return true;
    00616 }
    00617
    00622 static bool DisasterTick_Submarine(DisasterVehicle *v)
    00623 {
    00624   v->tick_counter++;
    00625
    00626   if (++v->age > 8880) {
    00627     delete v;
    00628     return false;
    00629   }
    00630
    00631   if (!HasBit(v->tick_counter, 0)) return true;
    00632
    00633   TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
    00634   if (IsValidTile(tile)) {
    00635     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
    00636     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
    00637       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00638       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00639       return true;
    00640     }
    00641   }
    00642
    00643   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
    00644
    00645   return true;
    00646 }
    00647
    00648
    00649 static bool DisasterTick_NULL(DisasterVehicle *v)
    00650 {
    00651   return true;
    00652 }
    00653
    00654 typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
    00655
    00656 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
    00657   DisasterTick_Zeppeliner, DisasterTick_NULL,
    00658   DisasterTick_Ufo,        DisasterTick_NULL,
    00659   DisasterTick_Airplane,   DisasterTick_NULL,
    00660   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
    00661   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
    00662   DisasterTick_NULL,
    00663   DisasterTick_Submarine,
    00664   DisasterTick_Submarine,
    00665 };
    00666
    00667
    00668 bool DisasterVehicle::Tick()
    00669 {
    00670   return _disastervehicle_tick_procs[this->subtype](this);
    00671 }
    00672
    00673 typedef void DisasterInitProc();
    00674
    00675
    00678 static void Disaster_Zeppeliner_Init()
    00679 {
    00680   if (!Vehicle::CanAllocateItem(2)) return;
    00681
    00682   /* Pick a random place, unless we find a small airport */
    00683   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00684
    00685   Station *st;
    00686   FOR_ALL_STATIONS(st) {
    00687     if (st->airport_tile != INVALID_TILE && (st->airport_type == AT_SMALL || st->airport_type == AT_LARGE)) {
    00688       x = (TileX(st->airport_tile) + 2) * TILE_SIZE;
    00689       break;
    00690     }
    00691   }
    00692
    00693   DisasterVehicle *v = new DisasterVehicle();
    00694   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_ZEPPELINER);
    00695
    00696   /* Allocate shadow */
    00697   DisasterVehicle *u = new DisasterVehicle();
    00698   v->SetNext(u);
    00699   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
    00700   u->vehstatus |= VS_SHADOW;
    00701 }
    00702
    00703
    00706 static void Disaster_Small_Ufo_Init()
    00707 {
    00708   if (!Vehicle::CanAllocateItem(2)) return;
    00709
    00710   DisasterVehicle *v = new DisasterVehicle();
    00711   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00712
    00713   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_SMALL_UFO);
    00714   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00715   v->age = 0;
    00716
    00717   /* Allocate shadow */
    00718   DisasterVehicle *u = new DisasterVehicle();
    00719   v->SetNext(u);
    00720   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
    00721   u->vehstatus |= VS_SHADOW;
    00722 }
    00723
    00724
    00725 /* Combat airplane which destroys an oil refinery */
    00726 static void Disaster_Airplane_Init()
    00727 {
    00728   if (!Vehicle::CanAllocateItem(2)) return;
    00729
    00730   Industry *i, *found = NULL;
    00731
    00732   FOR_ALL_INDUSTRIES(i) {
    00733     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
    00734         (found == NULL || Chance16(1, 2))) {
    00735       found = i;
    00736     }
    00737   }
    00738
    00739   if (found == NULL) return;
    00740
    00741   DisasterVehicle *v = new DisasterVehicle();
    00742
    00743   /* Start from the bottom (south side) of the map */
    00744   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
    00745   int y = TileY(found->xy) * TILE_SIZE + 37;
    00746
    00747   InitializeDisasterVehicle(v, x, y, 135, DIR_NE, ST_AIRPLANE);
    00748
    00749   DisasterVehicle *u = new DisasterVehicle();
    00750   v->SetNext(u);
    00751   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
    00752   u->vehstatus |= VS_SHADOW;
    00753 }
    00754
    00755
    00757 static void Disaster_Helicopter_Init()
    00758 {
    00759   if (!Vehicle::CanAllocateItem(3)) return;
    00760
    00761   Industry *i, *found = NULL;
    00762
    00763   FOR_ALL_INDUSTRIES(i) {
    00764     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
    00765         (found == NULL || Chance16(1, 2))) {
    00766       found = i;
    00767     }
    00768   }
    00769
    00770   if (found == NULL) return;
    00771
    00772   DisasterVehicle *v = new DisasterVehicle();
    00773
    00774   int x = -16 * TILE_SIZE;
    00775   int y = TileY(found->xy) * TILE_SIZE + 37;
    00776
    00777   InitializeDisasterVehicle(v, x, y, 135, DIR_SW, ST_HELICOPTER);
    00778
    00779   DisasterVehicle *u = new DisasterVehicle();
    00780   v->SetNext(u);
    00781   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
    00782   u->vehstatus |= VS_SHADOW;
    00783
    00784   DisasterVehicle *w = new DisasterVehicle();
    00785   u->SetNext(w);
    00786   InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
    00787 }
    00788
    00789
    00790 /* Big Ufo which lands on a piece of rail and will consequently be shot
    00791  * down by a combat airplane, destroying the surroundings */
    00792 static void Disaster_Big_Ufo_Init()
    00793 {
    00794   if (!Vehicle::CanAllocateItem(2)) return;
    00795
    00796   DisasterVehicle *v = new DisasterVehicle();
    00797   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00798   int y = MapMaxX() * TILE_SIZE - 1;
    00799
    00800   InitializeDisasterVehicle(v, x, y, 135, DIR_NW, ST_BIG_UFO);
    00801   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00802   v->age = 0;
    00803
    00804   /* Allocate shadow */
    00805   DisasterVehicle *u = new DisasterVehicle();
    00806   v->SetNext(u);
    00807   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
    00808   u->vehstatus |= VS_SHADOW;
    00809 }
    00810
    00811
    00812 static void Disaster_Submarine_Init(DisasterSubType subtype)
    00813 {
    00814   if (!Vehicle::CanAllocateItem()) return;
    00815
    00816   int y;
    00817   Direction dir;
    00818   uint32 r = Random();
    00819   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
    00820
    00821   if (HasBit(r, 31)) {
    00822     y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
    00823     dir = DIR_NW;
    00824   } else {
    00825     y = TILE_SIZE / 2;
    00826     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
    00827     dir = DIR_SE;
    00828   }
    00829   if (!IsWaterTile(TileVirtXY(x, y))) return;
    00830
    00831   DisasterVehicle *v = new DisasterVehicle();
    00832   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
    00833   v->age = 0;
    00834 }
    00835
    00836 /* Curious submarine #1, just floats around */
    00837 static void Disaster_Small_Submarine_Init()
    00838 {
    00839   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
    00840 }
    00841
    00842
    00843 /* Curious submarine #2, just floats around */
    00844 static void Disaster_Big_Submarine_Init()
    00845 {
    00846   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
    00847 }
    00848
    00849
    00852 static void Disaster_CoalMine_Init()
    00853 {
    00854   int index = GB(Random(), 0, 4);
    00855   uint m;
    00856
    00857   for (m = 0; m < 15; m++) {
    00858     const Industry *i;
    00859
    00860     FOR_ALL_INDUSTRIES(i) {
    00861       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
    00862         SetDParam(0, i->town->index);
    00863         AddNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE,
    00864           NS_ACCIDENT, NR_TILE, i->xy + TileDiffXY(1, 1)); // keep the news, even when the mine closes
    00865
    00866         {
    00867           TileIndex tile = i->xy;
    00868           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
    00869
    00870           for (uint n = 0; n < 30; n++) {
    00871             DisasterClearSquare(tile);
    00872             tile += step;
    00873             if (!IsValidTile(tile)) break;
    00874           }
    00875         }
    00876         return;
    00877       }
    00878     }
    00879   }
    00880 }
    00881
    00882 struct Disaster {
    00883   DisasterInitProc *init_proc;
    00884   Year min_year;
    00885   Year max_year;
    00886 };
    00887
    00888 static const Disaster _disasters[] = {
    00889   {Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
    00890   {Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
    00891   {Disaster_Airplane_Init,        1960, 1990}, // airplane
    00892   {Disaster_Helicopter_Init,      1970, 2000}, // helicopter
    00893   {Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
    00894   {Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
    00895   {Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
    00896   {Disaster_CoalMine_Init,        1950, 1985}, // coalmine
    00897 };
    00898
    00899 static void DoDisaster()
    00900 {
    00901   byte buf[lengthof(_disasters)];
    00902
    00903   byte j = 0;
    00904   for (size_t i = 0; i != lengthof(_disasters); i++) {
    00905     if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
    00906   }
    00907
    00908   if (j == 0) return;
    00909
    00910   _disasters[buf[RandomRange(j)]].init_proc();
    00911 }
    00912
    00913
    00914 static void ResetDisasterDelay()
    00915 {
    00916   _disaster_delay = GB(Random(), 0, 9) + 730;
    00917 }
    00918
    00919 void DisasterDailyLoop()
    00920 {
    00921   if (--_disaster_delay != 0) return;
    00922
    00923   ResetDisasterDelay();
    00924
    00925   if (_settings_game.difficulty.disasters != 0) DoDisaster();
    00926 }
    00927
    00928 void StartupDisasters()
    00929 {
    00930   ResetDisasterDelay();
    00931 }
    00932
    00937 void ReleaseDisastersTargetingIndustry(IndustryID i)
    00938 {
    00939   DisasterVehicle *v;
    00940   FOR_ALL_DISASTERVEHICLES(v) {
    00941     /* primary disaster vehicles that have chosen target */
    00942     if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
    00943       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
    00944       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
    00945     }
    00946   }
    00947 }
    00948
    00952 void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
    00953 {
    00954   DisasterVehicle *v;
    00955   FOR_ALL_DISASTERVEHICLES(v) {
    00956     /* primary disaster vehicles that have chosen target */
    00957     if (v->subtype == ST_SMALL_UFO) {
    00958       if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
    00959         /* Revert to target-searching */
    00960         v->current_order.SetDestination(0);
    00961         v->dest_tile = RandomTile();
    00962         v->z_pos = 135;
    00963         v->age = 0;
    00964       }
    00965     }
    00966   }
    00967 }
    00968
    00969 void DisasterVehicle::UpdateDeltaXY(Direction direction)
    00970 {
    00971   this->x_offs        = -1;
    00972   this->y_offs        = -1;
    00973   this->x_extent      =  2;
    00974   this->y_extent      =  2;
    00975   this->z_extent      =  5;
    00976 }