# 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 "game/game.hpp"
    00044 #include "company_base.h"
    00045 #include "core/random_func.hpp"
    00046 #include "core/backup_type.hpp"
    00047
    00048 #include "table/strings.h"
    00049
    00051 uint16 _disaster_delay;
    00052
    00053 enum DisasterSubType {
    00054   ST_ZEPPELINER,
    00055   ST_ZEPPELINER_SHADOW,
    00056   ST_SMALL_UFO,
    00057   ST_SMALL_UFO_SHADOW,
    00058   ST_AIRPLANE,
    00059   ST_AIRPLANE_SHADOW,
    00060   ST_HELICOPTER,
    00061   ST_HELICOPTER_SHADOW,
    00062   ST_HELICOPTER_ROTORS,
    00063   ST_BIG_UFO,
    00064   ST_BIG_UFO_SHADOW,
    00065   ST_BIG_UFO_DESTROYER,
    00066   ST_BIG_UFO_DESTROYER_SHADOW,
    00067   ST_SMALL_SUBMARINE,
    00068   ST_BIG_SUBMARINE,
    00069 };
    00070
    00071 static const uint INITIAL_DISASTER_VEHICLE_ZPOS = 135;
    00072
    00073 static void DisasterClearSquare(TileIndex tile)
    00074 {
    00075   if (EnsureNoVehicleOnGround(tile).Failed()) return;
    00076
    00077   switch (GetTileType(tile)) {
    00078     case MP_RAILWAY:
    00079       if (Company::IsHumanID(GetTileOwner(tile))) {
    00080         Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
    00081         DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00082         cur_company.Restore();
    00083
    00084         /* update signals in buffer */
    00085         UpdateSignalsInBuffer();
    00086       }
    00087       break;
    00088
    00089     case MP_HOUSE: {
    00090       Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);
    00091       DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00092       cur_company.Restore();
    00093       break;
    00094     }
    00095
    00096     case MP_TREES:
    00097     case MP_CLEAR:
    00098       DoClearSquare(tile);
    00099       break;
    00100
    00101     default:
    00102       break;
    00103   }
    00104 }
    00105
    00106 static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};
    00107 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};
    00108 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};
    00109 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};
    00110 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};
    00111 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};
    00112 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};
    00113 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};
    00114 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};
    00115
    00116 static const SpriteID * const _disaster_images[] = {
    00117   _disaster_images_1, _disaster_images_1,
    00118   _disaster_images_2, _disaster_images_2,
    00119   _disaster_images_3, _disaster_images_3,
    00120   _disaster_images_8, _disaster_images_8, _disaster_images_9,
    00121   _disaster_images_6, _disaster_images_6,
    00122   _disaster_images_7, _disaster_images_7,
    00123   _disaster_images_4, _disaster_images_5,
    00124 };
    00125
    00126 static void DisasterVehicleUpdateImage(DisasterVehicle *v)
    00127 {
    00128   SpriteID img = v->image_override;
    00129   if (img == 0) img = _disaster_images[v->subtype][v->direction];
    00130   v->cur_image = img;
    00131 }
    00132
    00137 static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, int z, Direction direction, byte subtype)
    00138 {
    00139   v->x_pos = x;
    00140   v->y_pos = y;
    00141   v->z_pos = z;
    00142   v->tile = TileVirtXY(x, y);
    00143   v->direction = direction;
    00144   v->subtype = subtype;
    00145   v->UpdateDeltaXY(INVALID_DIR);
    00146   v->owner = OWNER_NONE;
    00147   v->vehstatus = VS_UNCLICKABLE;
    00148   v->image_override = 0;
    00149   v->current_order.Free();
    00150
    00151   DisasterVehicleUpdateImage(v);
    00152   VehicleUpdatePositionAndViewport(v);
    00153 }
    00154
    00155 static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, int 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   VehicleUpdatePositionAndViewport(v);
    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 - GetSlopePixelZ(safe_x, safe_y), 0) >> 3);
    00172     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
    00173     u->z_pos = GetSlopePixelZ(safe_x, safe_y);
    00174     u->direction = v->direction;
    00175
    00176     DisasterVehicleUpdateImage(u);
    00177     VehicleUpdatePositionAndViewport(u);
    00178
    00179     if ((u = u->Next()) != NULL) {
    00180       u->x_pos = x;
    00181       u->y_pos = y;
    00182       u->z_pos = z + 5;
    00183       VehicleUpdatePositionAndViewport(u);
    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_CRASH_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, NT_ACCIDENT, v->index); // Delete the news, when the zeppelin is gone
    00222         AI::NewEvent(GetTileOwner(v->tile), new ScriptEventDisasterZeppelinerCrashed(GetStationIndex(v->tile)));
    00223       }
    00224     }
    00225
    00226     if (v->y_pos >= (int)((MapSizeY() + 9) * TILE_SIZE - 1)) {
    00227       delete v;
    00228       return false;
    00229     }
    00230
    00231     return true;
    00232   }
    00233
    00234   if (v->current_order.GetDestination() > 2) {
    00235     if (++v->age <= 13320) return true;
    00236
    00237     if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00238       Station *st = Station::GetByTile(v->tile);
    00239       CLRBITS(st->airport.flags, RUNWAY_IN_block);
    00240       AI::NewEvent(GetTileOwner(v->tile), new ScriptEventDisasterZeppelinerCleared(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   int z = GetSlopePixelZ(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) && IsAirportTile(v->tile)) {
    00276     SETBITS(Station::GetByTile(v->tile)->airport.flags, RUNWAY_IN_block);
    00277   }
    00278
    00279   return true;
    00280 }
    00281
    00288 static bool DisasterTick_Ufo(DisasterVehicle *v)
    00289 {
    00290   v->image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
    00291
    00292   if (v->current_order.GetDestination() == 0) {
    00293     /* Fly around randomly */
    00294     int x = TileX(v->dest_tile) * TILE_SIZE;
    00295     int y = TileY(v->dest_tile) * TILE_SIZE;
    00296     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
    00297       v->direction = GetDirectionTowards(v, x, y);
    00298       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00299       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00300       return true;
    00301     }
    00302     if (++v->age < 6) {
    00303       v->dest_tile = RandomTile();
    00304       return true;
    00305     }
    00306     v->current_order.SetDestination(1);
    00307
    00308     uint n = 0; // Total number of targetable road vehicles.
    00309     RoadVehicle *u;
    00310     FOR_ALL_ROADVEHICLES(u) {
    00311       if (u->IsFrontEngine()) n++;
    00312     }
    00313
    00314     if (n == 0) {
    00315       /* If there are no targetable road vehicles, destroy the UFO. */
    00316       delete v;
    00317       return false;
    00318     }
    00319
    00320     n = RandomRange(n); // Choose one of them.
    00321     FOR_ALL_ROADVEHICLES(u) {
    00322       /* Find (n+1)-th road vehicle. */
    00323       if (u->IsFrontEngine() && (n-- == 0)) break;
    00324     }
    00325
    00326     /* Target it. */
    00327     v->dest_tile = u->index;
    00328     v->age = 0;
    00329     return true;
    00330   } else {
    00331     /* Target a vehicle */
    00332     RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
    00333     assert(u != NULL && u->type == VEH_ROAD && u->IsFrontEngine());
    00334
    00335     uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
    00336
    00337     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
    00338       u->breakdown_ctr = 3;
    00339       u->breakdown_delay = 140;
    00340     }
    00341
    00342     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
    00343     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00344
    00345     int z = v->z_pos;
    00346     if (dist <= TILE_SIZE && z > u->z_pos) z--;
    00347     SetDisasterVehiclePos(v, gp.x, gp.y, z);
    00348
    00349     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
    00350       v->age++;
    00351       if (u->crashed_ctr == 0) {
    00352         u->Crash();
    00353
    00354         AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO, NT_ACCIDENT, u->index); // delete the news, when the roadvehicle is gone
    00355
    00356         AI::NewEvent(u->owner, new ScriptEventVehicleCrashed(u->index, u->tile, ScriptEventVehicleCrashed::CRASH_RV_UFO));
    00357         Game::NewEvent(new ScriptEventVehicleCrashed(u->index, u->tile, ScriptEventVehicleCrashed::CRASH_RV_UFO));
    00358       }
    00359     }
    00360
    00361     /* Destroy? */
    00362     if (v->age > 50) {
    00363       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00364       SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00365       delete v;
    00366       return false;
    00367     }
    00368   }
    00369
    00370   return true;
    00371 }
    00372
    00373 static void DestructIndustry(Industry *i)
    00374 {
    00375   for (TileIndex tile = 0; tile != MapSize(); tile++) {
    00376     if (i->TileBelongsToIndustry(tile)) {
    00377       ResetIndustryConstructionStage(tile);
    00378       MarkTileDirtyByTile(tile);
    00379     }
    00380   }
    00381 }
    00382
    00396 static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
    00397 {
    00398   v->tick_counter++;
    00399   v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
    00400
    00401   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00402   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00403
    00404   if ((leave_at_top && gp.x < (-10 * (int)TILE_SIZE)) || (!leave_at_top && gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1)) {
    00405     delete v;
    00406     return false;
    00407   }
    00408
    00409   if (v->current_order.GetDestination() == 2) {
    00410     if (GB(v->tick_counter, 0, 2) == 0) {
    00411       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00412       int x = TileX(i->location.tile) * TILE_SIZE;
    00413       int y = TileY(i->location.tile) * TILE_SIZE;
    00414       uint32 r = Random();
    00415
    00416       CreateEffectVehicleAbove(
    00417         GB(r,  0, 6) + x,
    00418         GB(r,  6, 6) + y,
    00419         GB(r, 12, 4),
    00420         EV_EXPLOSION_SMALL);
    00421
    00422       if (++v->age >= 55) v->current_order.SetDestination(3);
    00423     }
    00424   } else if (v->current_order.GetDestination() == 1) {
    00425     if (++v->age == 112) {
    00426       v->current_order.SetDestination(2);
    00427       v->age = 0;
    00428
    00429       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00430       DestructIndustry(i);
    00431
    00432       SetDParam(0, i->town->index);
    00433       AddIndustryNewsItem(news_message, NT_ACCIDENT, i->index); // delete the news, when the industry closes
    00434       SndPlayTileFx(SND_12_EXPLOSION, i->location.tile);
    00435     }
    00436   } else if (v->current_order.GetDestination() == 0) {
    00437     int x = v->x_pos + ((leave_at_top ? -15 : 15) * TILE_SIZE);
    00438     int y = v->y_pos;
    00439
    00440     if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
    00441
    00442     TileIndex tile = TileVirtXY(x, y);
    00443     if (!IsTileType(tile, MP_INDUSTRY)) return true;
    00444
    00445     IndustryID ind = GetIndustryIndex(tile);
    00446     v->dest_tile = ind;
    00447
    00448     if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
    00449       v->current_order.SetDestination(1);
    00450       v->age = 0;
    00451     }
    00452   }
    00453
    00454   return true;
    00455 }
    00456
    00458 static bool DisasterTick_Airplane(DisasterVehicle *v)
    00459 {
    00460   return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
    00461 }
    00462
    00464 static bool DisasterTick_Helicopter(DisasterVehicle *v)
    00465 {
    00466   return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
    00467 }
    00468
    00470 static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
    00471 {
    00472   v->tick_counter++;
    00473   if (HasBit(v->tick_counter, 0)) return true;
    00474
    00475   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
    00476
    00477   VehicleUpdatePositionAndViewport(v);
    00478
    00479   return true;
    00480 }
    00481
    00488 static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
    00489 {
    00490   v->tick_counter++;
    00491
    00492   if (v->current_order.GetDestination() == 1) {
    00493     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00494     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00495     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
    00496       v->direction = GetDirectionTowards(v, x, y);
    00497
    00498       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00499       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00500       return true;
    00501     }
    00502
    00503     if (!IsValidTile(v->dest_tile)) {
    00504       /* Make sure we don't land outside the map. */
    00505       delete v;
    00506       return false;
    00507     }
    00508
    00509     int z = GetSlopePixelZ(v->x_pos, v->y_pos);
    00510     if (z < v->z_pos) {
    00511       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
    00512       return true;
    00513     }
    00514
    00515     v->current_order.SetDestination(2);
    00516
    00517     Vehicle *target;
    00518     FOR_ALL_VEHICLES(target) {
    00519       if (target->IsGroundVehicle()) {
    00520         if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * (int)TILE_SIZE) {
    00521           target->breakdown_ctr = 5;
    00522           target->breakdown_delay = 0xF0;
    00523         }
    00524       }
    00525     }
    00526
    00527     Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
    00528     SetDParam(0, t->index);
    00529     AddTileNewsItem(STR_NEWS_DISASTER_BIG_UFO, NT_ACCIDENT, v->tile);
    00530
    00531     if (!Vehicle::CanAllocateItem(2)) {
    00532       delete v;
    00533       return false;
    00534     }
    00535     DisasterVehicle *u = new DisasterVehicle();
    00536
    00537     InitializeDisasterVehicle(u, -6 * (int)TILE_SIZE, v->y_pos, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_BIG_UFO_DESTROYER);
    00538     u->big_ufo_destroyer_target = v->index;
    00539
    00540     DisasterVehicle *w = new DisasterVehicle();
    00541
    00542     u->SetNext(w);
    00543     InitializeDisasterVehicle(w, -6 * (int)TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
    00544     w->vehstatus |= VS_SHADOW;
    00545   } else if (v->current_order.GetDestination() == 0) {
    00546     int x = TileX(v->dest_tile) * TILE_SIZE;
    00547     int y = TileY(v->dest_tile) * TILE_SIZE;
    00548     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
    00549       v->direction = GetDirectionTowards(v, x, y);
    00550       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00551       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00552       return true;
    00553     }
    00554
    00555     if (++v->age < 6) {
    00556       v->dest_tile = RandomTile();
    00557       return true;
    00558     }
    00559     v->current_order.SetDestination(1);
    00560
    00561     TileIndex tile_org = RandomTile();
    00562     TileIndex tile = tile_org;
    00563     do {
    00564       if (IsPlainRailTile(tile) &&
    00565           Company::IsHumanID(GetTileOwner(tile))) {
    00566         break;
    00567       }
    00568       tile = TILE_MASK(tile + 1);
    00569     } while (tile != tile_org);
    00570     v->dest_tile = tile;
    00571     v->age = 0;
    00572   }
    00573
    00574   return true;
    00575 }
    00576
    00581 static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
    00582 {
    00583   v->tick_counter++;
    00584
    00585   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00586   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00587
    00588   if (gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1) {
    00589     delete v;
    00590     return false;
    00591   }
    00592
    00593   if (v->current_order.GetDestination() == 0) {
    00594     Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
    00595     if (Delta(v->x_pos, u->x_pos) > (int)TILE_SIZE) return true;
    00596     v->current_order.SetDestination(1);
    00597
    00598     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
    00599     SndPlayVehicleFx(SND_12_EXPLOSION, u);
    00600
    00601     delete u;
    00602
    00603     for (int i = 0; i != 80; i++) {
    00604       uint32 r = Random();
    00605       CreateEffectVehicleAbove(
    00606         GB(r, 0, 6) + v->x_pos - 32,
    00607         GB(r, 5, 6) + v->y_pos - 32,
    00608         0,
    00609         EV_EXPLOSION_SMALL);
    00610     }
    00611
    00612     for (int dy = -3; dy < 3; dy++) {
    00613       for (int dx = -3; dx < 3; dx++) {
    00614         TileIndex tile = TileAddWrap(v->tile, dx, dy);
    00615         if (tile != INVALID_TILE) DisasterClearSquare(tile);
    00616       }
    00617     }
    00618   }
    00619
    00620   return true;
    00621 }
    00622
    00627 static bool DisasterTick_Submarine(DisasterVehicle *v)
    00628 {
    00629   v->tick_counter++;
    00630
    00631   if (++v->age > 8880) {
    00632     delete v;
    00633     return false;
    00634   }
    00635
    00636   if (!HasBit(v->tick_counter, 0)) return true;
    00637
    00638   TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
    00639   if (IsValidTile(tile)) {
    00640     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
    00641     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
    00642       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00643       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00644       return true;
    00645     }
    00646   }
    00647
    00648   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
    00649
    00650   return true;
    00651 }
    00652
    00653
    00654 static bool DisasterTick_NULL(DisasterVehicle *v)
    00655 {
    00656   return true;
    00657 }
    00658
    00659 typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
    00660
    00661 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
    00662   DisasterTick_Zeppeliner, DisasterTick_NULL,
    00663   DisasterTick_Ufo,        DisasterTick_NULL,
    00664   DisasterTick_Airplane,   DisasterTick_NULL,
    00665   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
    00666   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
    00667   DisasterTick_NULL,
    00668   DisasterTick_Submarine,
    00669   DisasterTick_Submarine,
    00670 };
    00671
    00672
    00673 bool DisasterVehicle::Tick()
    00674 {
    00675   return _disastervehicle_tick_procs[this->subtype](this);
    00676 }
    00677
    00678 typedef void DisasterInitProc();
    00679
    00680
    00685 static void Disaster_Zeppeliner_Init()
    00686 {
    00687   if (!Vehicle::CanAllocateItem(2)) return;
    00688
    00689   /* Pick a random place, unless we find a small airport */
    00690   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00691
    00692   Station *st;
    00693   FOR_ALL_STATIONS(st) {
    00694     if (st->airport.tile != INVALID_TILE && (st->airport.type == AT_SMALL || st->airport.type == AT_LARGE)) {
    00695       x = (TileX(st->airport.tile) + 2) * TILE_SIZE;
    00696       break;
    00697     }
    00698   }
    00699
    00700   DisasterVehicle *v = new DisasterVehicle();
    00701   InitializeDisasterVehicle(v, x, 0, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SE, ST_ZEPPELINER);
    00702
    00703   /* Allocate shadow */
    00704   DisasterVehicle *u = new DisasterVehicle();
    00705   v->SetNext(u);
    00706   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
    00707   u->vehstatus |= VS_SHADOW;
    00708 }
    00709
    00710
    00715 static void Disaster_Small_Ufo_Init()
    00716 {
    00717   if (!Vehicle::CanAllocateItem(2)) return;
    00718
    00719   DisasterVehicle *v = new DisasterVehicle();
    00720   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00721
    00722   InitializeDisasterVehicle(v, x, 0, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SE, ST_SMALL_UFO);
    00723   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00724   v->age = 0;
    00725
    00726   /* Allocate shadow */
    00727   DisasterVehicle *u = new DisasterVehicle();
    00728   v->SetNext(u);
    00729   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
    00730   u->vehstatus |= VS_SHADOW;
    00731 }
    00732
    00733
    00734 /* Combat airplane which destroys an oil refinery */
    00735 static void Disaster_Airplane_Init()
    00736 {
    00737   if (!Vehicle::CanAllocateItem(2)) return;
    00738
    00739   Industry *i, *found = NULL;
    00740
    00741   FOR_ALL_INDUSTRIES(i) {
    00742     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
    00743         (found == NULL || Chance16(1, 2))) {
    00744       found = i;
    00745     }
    00746   }
    00747
    00748   if (found == NULL) return;
    00749
    00750   DisasterVehicle *v = new DisasterVehicle();
    00751
    00752   /* Start from the bottom (south side) of the map */
    00753   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
    00754   int y = TileY(found->location.tile) * TILE_SIZE + 37;
    00755
    00756   InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_NE, ST_AIRPLANE);
    00757
    00758   DisasterVehicle *u = new DisasterVehicle();
    00759   v->SetNext(u);
    00760   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
    00761   u->vehstatus |= VS_SHADOW;
    00762 }
    00763
    00764
    00766 static void Disaster_Helicopter_Init()
    00767 {
    00768   if (!Vehicle::CanAllocateItem(3)) return;
    00769
    00770   Industry *i, *found = NULL;
    00771
    00772   FOR_ALL_INDUSTRIES(i) {
    00773     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
    00774         (found == NULL || Chance16(1, 2))) {
    00775       found = i;
    00776     }
    00777   }
    00778
    00779   if (found == NULL) return;
    00780
    00781   DisasterVehicle *v = new DisasterVehicle();
    00782
    00783   int x = -16 * (int)TILE_SIZE;
    00784   int y = TileY(found->location.tile) * TILE_SIZE + 37;
    00785
    00786   InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_HELICOPTER);
    00787
    00788   DisasterVehicle *u = new DisasterVehicle();
    00789   v->SetNext(u);
    00790   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
    00791   u->vehstatus |= VS_SHADOW;
    00792
    00793   DisasterVehicle *w = new DisasterVehicle();
    00794   u->SetNext(w);
    00795   InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
    00796 }
    00797
    00798
    00799 /* Big Ufo which lands on a piece of rail and will consequently be shot
    00800  * down by a combat airplane, destroying the surroundings */
    00801 static void Disaster_Big_Ufo_Init()
    00802 {
    00803   if (!Vehicle::CanAllocateItem(2)) return;
    00804
    00805   DisasterVehicle *v = new DisasterVehicle();
    00806   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00807   int y = MapMaxX() * TILE_SIZE - 1;
    00808
    00809   InitializeDisasterVehicle(v, x, y, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_NW, ST_BIG_UFO);
    00810   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00811   v->age = 0;
    00812
    00813   /* Allocate shadow */
    00814   DisasterVehicle *u = new DisasterVehicle();
    00815   v->SetNext(u);
    00816   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
    00817   u->vehstatus |= VS_SHADOW;
    00818 }
    00819
    00820
    00821 static void Disaster_Submarine_Init(DisasterSubType subtype)
    00822 {
    00823   if (!Vehicle::CanAllocateItem()) return;
    00824
    00825   int y;
    00826   Direction dir;
    00827   uint32 r = Random();
    00828   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
    00829
    00830   if (HasBit(r, 31)) {
    00831     y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
    00832     dir = DIR_NW;
    00833   } else {
    00834     y = TILE_SIZE / 2;
    00835     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
    00836     dir = DIR_SE;
    00837   }
    00838   if (!IsWaterTile(TileVirtXY(x, y))) return;
    00839
    00840   DisasterVehicle *v = new DisasterVehicle();
    00841   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
    00842   v->age = 0;
    00843 }
    00844
    00845 /* Curious submarine #1, just floats around */
    00846 static void Disaster_Small_Submarine_Init()
    00847 {
    00848   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
    00849 }
    00850
    00851
    00852 /* Curious submarine #2, just floats around */
    00853 static void Disaster_Big_Submarine_Init()
    00854 {
    00855   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
    00856 }
    00857
    00858
    00863 static void Disaster_CoalMine_Init()
    00864 {
    00865   int index = GB(Random(), 0, 4);
    00866   uint m;
    00867
    00868   for (m = 0; m < 15; m++) {
    00869     const Industry *i;
    00870
    00871     FOR_ALL_INDUSTRIES(i) {
    00872       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
    00873         SetDParam(0, i->town->index);
    00874         AddTileNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE, NT_ACCIDENT, i->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
    00875
    00876         {
    00877           TileIndex tile = i->location.tile;
    00878           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
    00879
    00880           for (uint n = 0; n < 30; n++) {
    00881             DisasterClearSquare(tile);
    00882             tile += step;
    00883             if (!IsValidTile(tile)) break;
    00884           }
    00885         }
    00886         return;
    00887       }
    00888     }
    00889   }
    00890 }
    00891
    00892 struct Disaster {
    00893   DisasterInitProc *init_proc;
    00894   Year min_year;
    00895   Year max_year;
    00896 };
    00897
    00898 static const Disaster _disasters[] = {
    00899   {Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
    00900   {Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
    00901   {Disaster_Airplane_Init,        1960, 1990}, // airplane
    00902   {Disaster_Helicopter_Init,      1970, 2000}, // helicopter
    00903   {Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
    00904   {Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
    00905   {Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
    00906   {Disaster_CoalMine_Init,        1950, 1985}, // coalmine
    00907 };
    00908
    00909 static void DoDisaster()
    00910 {
    00911   byte buf[lengthof(_disasters)];
    00912
    00913   byte j = 0;
    00914   for (size_t i = 0; i != lengthof(_disasters); i++) {
    00915     if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
    00916   }
    00917
    00918   if (j == 0) return;
    00919
    00920   _disasters[buf[RandomRange(j)]].init_proc();
    00921 }
    00922
    00923
    00924 static void ResetDisasterDelay()
    00925 {
    00926   _disaster_delay = GB(Random(), 0, 9) + 730;
    00927 }
    00928
    00929 void DisasterDailyLoop()
    00930 {
    00931   if (--_disaster_delay != 0) return;
    00932
    00933   ResetDisasterDelay();
    00934
    00935   if (_settings_game.difficulty.disasters != 0) DoDisaster();
    00936 }
    00937
    00938 void StartupDisasters()
    00939 {
    00940   ResetDisasterDelay();
    00941 }
    00942
    00948 void ReleaseDisastersTargetingIndustry(IndustryID i)
    00949 {
    00950   DisasterVehicle *v;
    00951   FOR_ALL_DISASTERVEHICLES(v) {
    00952     /* primary disaster vehicles that have chosen target */
    00953     if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
    00954       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
    00955       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
    00956     }
    00957   }
    00958 }
    00959
    00964 void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
    00965 {
    00966   DisasterVehicle *v;
    00967   FOR_ALL_DISASTERVEHICLES(v) {
    00968     /* primary disaster vehicles that have chosen target */
    00969     if (v->subtype == ST_SMALL_UFO) {
    00970       if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
    00971         /* Revert to target-searching */
    00972         v->current_order.SetDestination(0);
    00973         v->dest_tile = RandomTile();
    00974         v->z_pos = INITIAL_DISASTER_VEHICLE_ZPOS;
    00975         v->age = 0;
    00976       }
    00977     }
    00978   }
    00979 }
    00980
    00981 void DisasterVehicle::UpdateDeltaXY(Direction direction)
    00982 {
    00983   this->x_offs        = -1;
    00984   this->y_offs        = -1;
    00985   this->x_extent      =  2;
    00986   this->y_extent      =  2;
    00987   this->z_extent      =  5;
    00988 }