disaster_cmd.cpp

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00001 /* $Id: disaster_cmd.cpp 18717 2010-01-04 18:21:07Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00026 #include "stdafx.h"
00027 #include "landscape.h"
00028 
00029 #include "industry.h"
00030 #include "station_base.h"
00031 #include "command_func.h"
00032 #include "news_func.h"
00033 #include "town.h"
00034 #include "company_func.h"
00035 #include "variables.h"
00036 #include "strings_func.h"
00037 #include "date_func.h"
00038 #include "functions.h"
00039 #include "vehicle_func.h"
00040 #include "sound_func.h"
00041 #include "effectvehicle_func.h"
00042 #include "roadveh.h"
00043 #include "ai/ai.hpp"
00044 
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->location.tile) * TILE_SIZE;
00405       int y = TileY(i->location.tile) * 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->location.tile);
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->location.tile) * 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->location.tile) * 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->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
00865 
00866         {
00867           TileIndex tile = i->location.tile;
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 }

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