# disaster_cmd.cpp

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    00001 /* $Id: disaster_cmd.cpp 18858 2010-01-18 12:36:08Z yexo $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00026 #include "stdafx.h"
    00027 #include "landscape.h"
    00028
    00029 #include "industry.h"
    00030 #include "station_base.h"
    00031 #include "command_func.h"
    00032 #include "news_func.h"
    00033 #include "town.h"
    00034 #include "company_func.h"
    00035 #include "variables.h"
    00036 #include "strings_func.h"
    00037 #include "date_func.h"
    00038 #include "functions.h"
    00039 #include "vehicle_func.h"
    00040 #include "sound_func.h"
    00041 #include "effectvehicle_func.h"
    00042 #include "roadveh.h"
    00043 #include "ai/ai.hpp"
    00044 #include "company_base.h"
    00045 #include "core/random_func.hpp"
    00046
    00047 #include "table/strings.h"
    00048 #include "table/sprites.h"
    00049
    00050 enum DisasterSubType {
    00051   ST_ZEPPELINER,
    00052   ST_ZEPPELINER_SHADOW,
    00053   ST_SMALL_UFO,
    00054   ST_SMALL_UFO_SHADOW,
    00055   ST_AIRPLANE,
    00056   ST_AIRPLANE_SHADOW,
    00057   ST_HELICOPTER,
    00058   ST_HELICOPTER_SHADOW,
    00059   ST_HELICOPTER_ROTORS,
    00060   ST_BIG_UFO,
    00061   ST_BIG_UFO_SHADOW,
    00062   ST_BIG_UFO_DESTROYER,
    00063   ST_BIG_UFO_DESTROYER_SHADOW,
    00064   ST_SMALL_SUBMARINE,
    00065   ST_BIG_SUBMARINE,
    00066 };
    00067
    00068 static void DisasterClearSquare(TileIndex tile)
    00069 {
    00070   if (!EnsureNoVehicleOnGround(tile)) return;
    00071
    00072   switch (GetTileType(tile)) {
    00073     case MP_RAILWAY:
    00074       if (Company::IsHumanID(GetTileOwner(tile))) {
    00075         CompanyID old_company = _current_company;
    00076         _current_company = OWNER_WATER;
    00077         DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00078         _current_company = old_company;
    00079
    00080         /* update signals in buffer */
    00081         UpdateSignalsInBuffer();
    00082       }
    00083       break;
    00084
    00085     case MP_HOUSE: {
    00086       CompanyID old_company = _current_company;
    00087       _current_company = OWNER_NONE;
    00088       DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
    00089       _current_company = old_company;
    00090       break;
    00091     }
    00092
    00093     case MP_TREES:
    00094     case MP_CLEAR:
    00095       DoClearSquare(tile);
    00096       break;
    00097
    00098     default:
    00099       break;
    00100   }
    00101 }
    00102
    00103 static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};
    00104 static const SpriteID _disaster_images_2[] = {SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT};
    00105 static const SpriteID _disaster_images_3[] = {SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15};
    00106 static const SpriteID _disaster_images_4[] = {SPR_SUB_SMALL_NE, SPR_SUB_SMALL_NE, SPR_SUB_SMALL_SE, SPR_SUB_SMALL_SE, SPR_SUB_SMALL_SW, SPR_SUB_SMALL_SW, SPR_SUB_SMALL_NW, SPR_SUB_SMALL_NW};
    00107 static const SpriteID _disaster_images_5[] = {SPR_SUB_LARGE_NE, SPR_SUB_LARGE_NE, SPR_SUB_LARGE_SE, SPR_SUB_LARGE_SE, SPR_SUB_LARGE_SW, SPR_SUB_LARGE_SW, SPR_SUB_LARGE_NW, SPR_SUB_LARGE_NW};
    00108 static const SpriteID _disaster_images_6[] = {SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER};
    00109 static const SpriteID _disaster_images_7[] = {SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER};
    00110 static const SpriteID _disaster_images_8[] = {SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A};
    00111 static const SpriteID _disaster_images_9[] = {SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1};
    00112
    00113 static const SpriteID * const _disaster_images[] = {
    00114   _disaster_images_1, _disaster_images_1,
    00115   _disaster_images_2, _disaster_images_2,
    00116   _disaster_images_3, _disaster_images_3,
    00117   _disaster_images_8, _disaster_images_8, _disaster_images_9,
    00118   _disaster_images_6, _disaster_images_6,
    00119   _disaster_images_7, _disaster_images_7,
    00120   _disaster_images_4, _disaster_images_5,
    00121 };
    00122
    00123 static void DisasterVehicleUpdateImage(DisasterVehicle *v)
    00124 {
    00125   SpriteID img = v->image_override;
    00126   if (img == 0) img = _disaster_images[v->subtype][v->direction];
    00127   v->cur_image = img;
    00128 }
    00129
    00132 static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, byte z, Direction direction, byte subtype)
    00133 {
    00134   v->x_pos = x;
    00135   v->y_pos = y;
    00136   v->z_pos = z;
    00137   v->tile = TileVirtXY(x, y);
    00138   v->direction = direction;
    00139   v->subtype = subtype;
    00140   v->UpdateDeltaXY(INVALID_DIR);
    00141   v->owner = OWNER_NONE;
    00142   v->vehstatus = VS_UNCLICKABLE;
    00143   v->image_override = 0;
    00144   v->current_order.Free();
    00145
    00146   DisasterVehicleUpdateImage(v);
    00147   VehicleMove(v, false);
    00148   MarkSingleVehicleDirty(v);
    00149 }
    00150
    00151 static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, byte z)
    00152 {
    00153   v->x_pos = x;
    00154   v->y_pos = y;
    00155   v->z_pos = z;
    00156   v->tile = TileVirtXY(x, y);
    00157
    00158   DisasterVehicleUpdateImage(v);
    00159   VehicleMove(v, true);
    00160
    00161   DisasterVehicle *u = v->Next();
    00162   if (u != NULL) {
    00163     int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
    00164     int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
    00165
    00166     u->x_pos = x;
    00167     u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);
    00168     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
    00169     u->z_pos = GetSlopeZ(safe_x, safe_y);
    00170     u->direction = v->direction;
    00171
    00172     DisasterVehicleUpdateImage(u);
    00173     VehicleMove(u, true);
    00174
    00175     if ((u = u->Next()) != NULL) {
    00176       u->x_pos = x;
    00177       u->y_pos = y;
    00178       u->z_pos = z + 5;
    00179       VehicleMove(u, true);
    00180     }
    00181   }
    00182 }
    00183
    00192 static bool DisasterTick_Zeppeliner(DisasterVehicle *v)
    00193 {
    00194   v->tick_counter++;
    00195
    00196   if (v->current_order.GetDestination() < 2) {
    00197     if (HasBit(v->tick_counter, 0)) return true;
    00198
    00199     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00200
    00201     SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00202
    00203     if (v->current_order.GetDestination() == 1) {
    00204       if (++v->age == 38) {
    00205         v->current_order.SetDestination(2);
    00206         v->age = 0;
    00207       }
    00208
    00209       if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_SMOKE);
    00210
    00211     } else if (v->current_order.GetDestination() == 0) {
    00212       if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00213         v->current_order.SetDestination(1);
    00214         v->age = 0;
    00215
    00216         SetDParam(0, GetStationIndex(v->tile));
    00217         AddVehicleNewsItem(STR_NEWS_DISASTER_ZEPPELIN,
    00218           NS_ACCIDENT,
    00219           v->index); // Delete the news, when the zeppelin is gone
    00220         AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCrashed(GetStationIndex(v->tile)));
    00221       }
    00222     }
    00223
    00224     if (v->y_pos >= ((int)MapSizeY() + 9) * TILE_SIZE - 1) {
    00225       delete v;
    00226       return false;
    00227     }
    00228
    00229     return true;
    00230   }
    00231
    00232   if (v->current_order.GetDestination() > 2) {
    00233     if (++v->age <= 13320) return true;
    00234
    00235     if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00236       Station *st = Station::GetByTile(v->tile);
    00237       CLRBITS(st->airport_flags, RUNWAY_IN_block);
    00238       AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCleared(st->index));
    00239     }
    00240
    00241     SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
    00242     delete v;
    00243     return false;
    00244   }
    00245
    00246   int x = v->x_pos;
    00247   int y = v->y_pos;
    00248   byte z = GetSlopeZ(x, y);
    00249   if (z < v->z_pos) z = v->z_pos - 1;
    00250   SetDisasterVehiclePos(v, x, y, z);
    00251
    00252   if (++v->age == 1) {
    00253     CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00254     SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00255     v->image_override = SPR_BLIMP_CRASHING;
    00256   } else if (v->age == 70) {
    00257     v->image_override = SPR_BLIMP_CRASHED;
    00258   } else if (v->age <= 300) {
    00259     if (GB(v->tick_counter, 0, 3) == 0) {
    00260       uint32 r = Random();
    00261
    00262       CreateEffectVehicleRel(v,
    00263         GB(r, 0, 4) - 7,
    00264         GB(r, 4, 4) - 7,
    00265         GB(r, 8, 3) + 5,
    00266         EV_EXPLOSION_SMALL);
    00267     }
    00268   } else if (v->age == 350) {
    00269     v->current_order.SetDestination(3);
    00270     v->age = 0;
    00271   }
    00272
    00273   if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
    00274     SETBITS(Station::GetByTile(v->tile)->airport_flags, RUNWAY_IN_block);
    00275   }
    00276
    00277   return true;
    00278 }
    00279
    00286 static bool DisasterTick_Ufo(DisasterVehicle *v)
    00287 {
    00288   v->image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
    00289
    00290   if (v->current_order.GetDestination() == 0) {
    00291     /* Fly around randomly */
    00292     int x = TileX(v->dest_tile) * TILE_SIZE;
    00293     int y = TileY(v->dest_tile) * TILE_SIZE;
    00294     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
    00295       v->direction = GetDirectionTowards(v, x, y);
    00296       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00297       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00298       return true;
    00299     }
    00300     if (++v->age < 6) {
    00301       v->dest_tile = RandomTile();
    00302       return true;
    00303     }
    00304     v->current_order.SetDestination(1);
    00305
    00306     RoadVehicle *u;
    00307     FOR_ALL_ROADVEHICLES(u) {
    00308       if (u->IsRoadVehFront()) {
    00309         v->dest_tile = u->index;
    00310         v->age = 0;
    00311         return true;
    00312       }
    00313     }
    00314
    00315     delete v;
    00316     return false;
    00317   } else {
    00318     /* Target a vehicle */
    00319     RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
    00320     assert(u != NULL && u->type == VEH_ROAD && u->IsRoadVehFront());
    00321
    00322     uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
    00323
    00324     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
    00325       u->breakdown_ctr = 3;
    00326       u->breakdown_delay = 140;
    00327     }
    00328
    00329     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
    00330     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00331
    00332     byte z = v->z_pos;
    00333     if (dist <= TILE_SIZE && z > u->z_pos) z--;
    00334     SetDisasterVehiclePos(v, gp.x, gp.y, z);
    00335
    00336     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
    00337       v->age++;
    00338       if (u->crashed_ctr == 0) {
    00339         u->Crash();
    00340
    00341         AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO,
    00342           NS_ACCIDENT,
    00343           u->index); // delete the news, when the roadvehicle is gone
    00344
    00345         AI::NewEvent(u->owner, new AIEventVehicleCrashed(u->index, u->tile, AIEventVehicleCrashed::CRASH_RV_UFO));
    00346       }
    00347     }
    00348
    00349     /* Destroy? */
    00350     if (v->age > 50) {
    00351       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
    00352       SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00353       delete v;
    00354       return false;
    00355     }
    00356   }
    00357
    00358   return true;
    00359 }
    00360
    00361 static void DestructIndustry(Industry *i)
    00362 {
    00363   for (TileIndex tile = 0; tile != MapSize(); tile++) {
    00364     if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {
    00365       ResetIndustryConstructionStage(tile);
    00366       MarkTileDirtyByTile(tile);
    00367     }
    00368   }
    00369 }
    00370
    00384 static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
    00385 {
    00386   v->tick_counter++;
    00387   v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
    00388
    00389   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00390   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00391
    00392   if ((leave_at_top && gp.x < (-10 * TILE_SIZE)) || (!leave_at_top && gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1)) {
    00393     delete v;
    00394     return false;
    00395   }
    00396
    00397   if (v->current_order.GetDestination() == 2) {
    00398     if (GB(v->tick_counter, 0, 2) == 0) {
    00399       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00400       int x = TileX(i->location.tile) * TILE_SIZE;
    00401       int y = TileY(i->location.tile) * TILE_SIZE;
    00402       uint32 r = Random();
    00403
    00404       CreateEffectVehicleAbove(
    00405         GB(r,  0, 6) + x,
    00406         GB(r,  6, 6) + y,
    00407         GB(r, 12, 4),
    00408         EV_EXPLOSION_SMALL);
    00409
    00410       if (++v->age >= 55) v->current_order.SetDestination(3);
    00411     }
    00412   } else if (v->current_order.GetDestination() == 1) {
    00413     if (++v->age == 112) {
    00414       v->current_order.SetDestination(2);
    00415       v->age = 0;
    00416
    00417       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
    00418       DestructIndustry(i);
    00419
    00420       SetDParam(0, i->town->index);
    00421       AddIndustryNewsItem(news_message, NS_ACCIDENT, i->index); // delete the news, when the industry closes
    00422       SndPlayTileFx(SND_12_EXPLOSION, i->location.tile);
    00423     }
    00424   } else if (v->current_order.GetDestination() == 0) {
    00425     int x = v->x_pos - (15 * TILE_SIZE);
    00426     int y = v->y_pos;
    00427
    00428     if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
    00429
    00430     TileIndex tile = TileVirtXY(x, y);
    00431     if (!IsTileType(tile, MP_INDUSTRY)) return true;
    00432
    00433     IndustryID ind = GetIndustryIndex(tile);
    00434     v->dest_tile = ind;
    00435
    00436     if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
    00437       v->current_order.SetDestination(1);
    00438       v->age = 0;
    00439     }
    00440   }
    00441
    00442   return true;
    00443 }
    00444
    00446 static bool DisasterTick_Airplane(DisasterVehicle *v)
    00447 {
    00448   return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
    00449 }
    00450
    00452 static bool DisasterTick_Helicopter(DisasterVehicle *v)
    00453 {
    00454   return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
    00455 }
    00456
    00458 static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
    00459 {
    00460   v->tick_counter++;
    00461   if (HasBit(v->tick_counter, 0)) return true;
    00462
    00463   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
    00464
    00465   VehicleMove(v, true);
    00466
    00467   return true;
    00468 }
    00469
    00476 static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
    00477 {
    00478   v->tick_counter++;
    00479
    00480   if (v->current_order.GetDestination() == 1) {
    00481     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00482     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
    00483     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
    00484       v->direction = GetDirectionTowards(v, x, y);
    00485
    00486       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00487       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00488       return true;
    00489     }
    00490
    00491     if (!IsValidTile(v->dest_tile)) {
    00492       /* Make sure we don't land outside the map. */
    00493       delete v;
    00494       return false;
    00495     }
    00496
    00497     byte z = GetSlopeZ(v->x_pos, v->y_pos);
    00498     if (z < v->z_pos) {
    00499       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
    00500       return true;
    00501     }
    00502
    00503     v->current_order.SetDestination(2);
    00504
    00505     Vehicle *target;
    00506     FOR_ALL_VEHICLES(target) {
    00507       if (target->type == VEH_TRAIN || target->type == VEH_ROAD) {
    00508         if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * TILE_SIZE) {
    00509           target->breakdown_ctr = 5;
    00510           target->breakdown_delay = 0xF0;
    00511         }
    00512       }
    00513     }
    00514
    00515     Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
    00516     SetDParam(0, t->index);
    00517     AddNewsItem(STR_NEWS_DISASTER_BIG_UFO,
    00518       NS_ACCIDENT,
    00519       NR_TILE,
    00520       v->tile);
    00521
    00522     if (!Vehicle::CanAllocateItem(2)) {
    00523       delete v;
    00524       return false;
    00525     }
    00526     DisasterVehicle *u = new DisasterVehicle();
    00527
    00528     InitializeDisasterVehicle(u, -6 * TILE_SIZE, v->y_pos, 135, DIR_SW, ST_BIG_UFO_DESTROYER);
    00529     u->big_ufo_destroyer_target = v->index;
    00530
    00531     DisasterVehicle *w = new DisasterVehicle();
    00532
    00533     u->SetNext(w);
    00534     InitializeDisasterVehicle(w, -6 * TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
    00535     w->vehstatus |= VS_SHADOW;
    00536   } else if (v->current_order.GetDestination() == 0) {
    00537     int x = TileX(v->dest_tile) * TILE_SIZE;
    00538     int y = TileY(v->dest_tile) * TILE_SIZE;
    00539     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
    00540       v->direction = GetDirectionTowards(v, x, y);
    00541       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00542       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00543       return true;
    00544     }
    00545
    00546     if (++v->age < 6) {
    00547       v->dest_tile = RandomTile();
    00548       return true;
    00549     }
    00550     v->current_order.SetDestination(1);
    00551
    00552     TileIndex tile_org = RandomTile();
    00553     TileIndex tile = tile_org;
    00554     do {
    00555       if (IsPlainRailTile(tile) &&
    00556           Company::IsHumanID(GetTileOwner(tile))) {
    00557         break;
    00558       }
    00559       tile = TILE_MASK(tile + 1);
    00560     } while (tile != tile_org);
    00561     v->dest_tile = tile;
    00562     v->age = 0;
    00563   }
    00564
    00565   return true;
    00566 }
    00567
    00572 static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
    00573 {
    00574   v->tick_counter++;
    00575
    00576   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00577   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00578
    00579   if (gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1) {
    00580     delete v;
    00581     return false;
    00582   }
    00583
    00584   if (v->current_order.GetDestination() == 0) {
    00585     Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
    00586     if (Delta(v->x_pos, u->x_pos) > TILE_SIZE) return true;
    00587     v->current_order.SetDestination(1);
    00588
    00589     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
    00590     SndPlayVehicleFx(SND_12_EXPLOSION, u);
    00591
    00592     delete u;
    00593
    00594     for (int i = 0; i != 80; i++) {
    00595       uint32 r = Random();
    00596       CreateEffectVehicleAbove(
    00597         GB(r, 0, 6) + v->x_pos - 32,
    00598         GB(r, 5, 6) + v->y_pos - 32,
    00599         0,
    00600         EV_EXPLOSION_SMALL);
    00601     }
    00602
    00603     for (int dy = -3; dy < 3; dy++) {
    00604       for (int dx = -3; dx < 3; dx++) {
    00605         TileIndex tile = TileAddWrap(v->tile, dx, dy);
    00606         if (tile != INVALID_TILE) DisasterClearSquare(tile);
    00607       }
    00608     }
    00609   }
    00610
    00611   return true;
    00612 }
    00613
    00618 static bool DisasterTick_Submarine(DisasterVehicle *v)
    00619 {
    00620   v->tick_counter++;
    00621
    00622   if (++v->age > 8880) {
    00623     delete v;
    00624     return false;
    00625   }
    00626
    00627   if (!HasBit(v->tick_counter, 0)) return true;
    00628
    00629   TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
    00630   if (IsValidTile(tile)) {
    00631     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
    00632     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
    00633       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00634       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
    00635       return true;
    00636     }
    00637   }
    00638
    00639   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
    00640
    00641   return true;
    00642 }
    00643
    00644
    00645 static bool DisasterTick_NULL(DisasterVehicle *v)
    00646 {
    00647   return true;
    00648 }
    00649
    00650 typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
    00651
    00652 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
    00653   DisasterTick_Zeppeliner, DisasterTick_NULL,
    00654   DisasterTick_Ufo,        DisasterTick_NULL,
    00655   DisasterTick_Airplane,   DisasterTick_NULL,
    00656   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
    00657   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
    00658   DisasterTick_NULL,
    00659   DisasterTick_Submarine,
    00660   DisasterTick_Submarine,
    00661 };
    00662
    00663
    00664 bool DisasterVehicle::Tick()
    00665 {
    00666   return _disastervehicle_tick_procs[this->subtype](this);
    00667 }
    00668
    00669 typedef void DisasterInitProc();
    00670
    00671
    00674 static void Disaster_Zeppeliner_Init()
    00675 {
    00676   if (!Vehicle::CanAllocateItem(2)) return;
    00677
    00678   /* Pick a random place, unless we find a small airport */
    00679   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00680
    00681   Station *st;
    00682   FOR_ALL_STATIONS(st) {
    00683     if (st->airport_tile != INVALID_TILE && (st->airport_type == AT_SMALL || st->airport_type == AT_LARGE)) {
    00684       x = (TileX(st->airport_tile) + 2) * TILE_SIZE;
    00685       break;
    00686     }
    00687   }
    00688
    00689   DisasterVehicle *v = new DisasterVehicle();
    00690   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_ZEPPELINER);
    00691
    00692   /* Allocate shadow */
    00693   DisasterVehicle *u = new DisasterVehicle();
    00694   v->SetNext(u);
    00695   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
    00696   u->vehstatus |= VS_SHADOW;
    00697 }
    00698
    00699
    00702 static void Disaster_Small_Ufo_Init()
    00703 {
    00704   if (!Vehicle::CanAllocateItem(2)) return;
    00705
    00706   DisasterVehicle *v = new DisasterVehicle();
    00707   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00708
    00709   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_SMALL_UFO);
    00710   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00711   v->age = 0;
    00712
    00713   /* Allocate shadow */
    00714   DisasterVehicle *u = new DisasterVehicle();
    00715   v->SetNext(u);
    00716   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
    00717   u->vehstatus |= VS_SHADOW;
    00718 }
    00719
    00720
    00721 /* Combat airplane which destroys an oil refinery */
    00722 static void Disaster_Airplane_Init()
    00723 {
    00724   if (!Vehicle::CanAllocateItem(2)) return;
    00725
    00726   Industry *i, *found = NULL;
    00727
    00728   FOR_ALL_INDUSTRIES(i) {
    00729     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
    00730         (found == NULL || Chance16(1, 2))) {
    00731       found = i;
    00732     }
    00733   }
    00734
    00735   if (found == NULL) return;
    00736
    00737   DisasterVehicle *v = new DisasterVehicle();
    00738
    00739   /* Start from the bottom (south side) of the map */
    00740   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
    00741   int y = TileY(found->location.tile) * TILE_SIZE + 37;
    00742
    00743   InitializeDisasterVehicle(v, x, y, 135, DIR_NE, ST_AIRPLANE);
    00744
    00745   DisasterVehicle *u = new DisasterVehicle();
    00746   v->SetNext(u);
    00747   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
    00748   u->vehstatus |= VS_SHADOW;
    00749 }
    00750
    00751
    00753 static void Disaster_Helicopter_Init()
    00754 {
    00755   if (!Vehicle::CanAllocateItem(3)) return;
    00756
    00757   Industry *i, *found = NULL;
    00758
    00759   FOR_ALL_INDUSTRIES(i) {
    00760     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
    00761         (found == NULL || Chance16(1, 2))) {
    00762       found = i;
    00763     }
    00764   }
    00765
    00766   if (found == NULL) return;
    00767
    00768   DisasterVehicle *v = new DisasterVehicle();
    00769
    00770   int x = -16 * TILE_SIZE;
    00771   int y = TileY(found->location.tile) * TILE_SIZE + 37;
    00772
    00773   InitializeDisasterVehicle(v, x, y, 135, DIR_SW, ST_HELICOPTER);
    00774
    00775   DisasterVehicle *u = new DisasterVehicle();
    00776   v->SetNext(u);
    00777   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
    00778   u->vehstatus |= VS_SHADOW;
    00779
    00780   DisasterVehicle *w = new DisasterVehicle();
    00781   u->SetNext(w);
    00782   InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
    00783 }
    00784
    00785
    00786 /* Big Ufo which lands on a piece of rail and will consequently be shot
    00787  * down by a combat airplane, destroying the surroundings */
    00788 static void Disaster_Big_Ufo_Init()
    00789 {
    00790   if (!Vehicle::CanAllocateItem(2)) return;
    00791
    00792   DisasterVehicle *v = new DisasterVehicle();
    00793   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
    00794   int y = MapMaxX() * TILE_SIZE - 1;
    00795
    00796   InitializeDisasterVehicle(v, x, y, 135, DIR_NW, ST_BIG_UFO);
    00797   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
    00798   v->age = 0;
    00799
    00800   /* Allocate shadow */
    00801   DisasterVehicle *u = new DisasterVehicle();
    00802   v->SetNext(u);
    00803   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
    00804   u->vehstatus |= VS_SHADOW;
    00805 }
    00806
    00807
    00808 static void Disaster_Submarine_Init(DisasterSubType subtype)
    00809 {
    00810   if (!Vehicle::CanAllocateItem()) return;
    00811
    00812   int y;
    00813   Direction dir;
    00814   uint32 r = Random();
    00815   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
    00816
    00817   if (HasBit(r, 31)) {
    00818     y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
    00819     dir = DIR_NW;
    00820   } else {
    00821     y = TILE_SIZE / 2;
    00822     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
    00823     dir = DIR_SE;
    00824   }
    00825   if (!IsWaterTile(TileVirtXY(x, y))) return;
    00826
    00827   DisasterVehicle *v = new DisasterVehicle();
    00828   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
    00829   v->age = 0;
    00830 }
    00831
    00832 /* Curious submarine #1, just floats around */
    00833 static void Disaster_Small_Submarine_Init()
    00834 {
    00835   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
    00836 }
    00837
    00838
    00839 /* Curious submarine #2, just floats around */
    00840 static void Disaster_Big_Submarine_Init()
    00841 {
    00842   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
    00843 }
    00844
    00845
    00848 static void Disaster_CoalMine_Init()
    00849 {
    00850   int index = GB(Random(), 0, 4);
    00851   uint m;
    00852
    00853   for (m = 0; m < 15; m++) {
    00854     const Industry *i;
    00855
    00856     FOR_ALL_INDUSTRIES(i) {
    00857       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
    00858         SetDParam(0, i->town->index);
    00859         AddNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE,
    00860           NS_ACCIDENT, NR_TILE, i->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
    00861
    00862         {
    00863           TileIndex tile = i->location.tile;
    00864           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
    00865
    00866           for (uint n = 0; n < 30; n++) {
    00867             DisasterClearSquare(tile);
    00868             tile += step;
    00869             if (!IsValidTile(tile)) break;
    00870           }
    00871         }
    00872         return;
    00873       }
    00874     }
    00875   }
    00876 }
    00877
    00878 struct Disaster {
    00879   DisasterInitProc *init_proc;
    00880   Year min_year;
    00881   Year max_year;
    00882 };
    00883
    00884 static const Disaster _disasters[] = {
    00885   {Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
    00886   {Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
    00887   {Disaster_Airplane_Init,        1960, 1990}, // airplane
    00888   {Disaster_Helicopter_Init,      1970, 2000}, // helicopter
    00889   {Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
    00890   {Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
    00891   {Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
    00892   {Disaster_CoalMine_Init,        1950, 1985}, // coalmine
    00893 };
    00894
    00895 static void DoDisaster()
    00896 {
    00897   byte buf[lengthof(_disasters)];
    00898
    00899   byte j = 0;
    00900   for (size_t i = 0; i != lengthof(_disasters); i++) {
    00901     if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
    00902   }
    00903
    00904   if (j == 0) return;
    00905
    00906   _disasters[buf[RandomRange(j)]].init_proc();
    00907 }
    00908
    00909
    00910 static void ResetDisasterDelay()
    00911 {
    00912   _disaster_delay = GB(Random(), 0, 9) + 730;
    00913 }
    00914
    00915 void DisasterDailyLoop()
    00916 {
    00917   if (--_disaster_delay != 0) return;
    00918
    00919   ResetDisasterDelay();
    00920
    00921   if (_settings_game.difficulty.disasters != 0) DoDisaster();
    00922 }
    00923
    00924 void StartupDisasters()
    00925 {
    00926   ResetDisasterDelay();
    00927 }
    00928
    00933 void ReleaseDisastersTargetingIndustry(IndustryID i)
    00934 {
    00935   DisasterVehicle *v;
    00936   FOR_ALL_DISASTERVEHICLES(v) {
    00937     /* primary disaster vehicles that have chosen target */
    00938     if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
    00939       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
    00940       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
    00941     }
    00942   }
    00943 }
    00944
    00948 void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
    00949 {
    00950   DisasterVehicle *v;
    00951   FOR_ALL_DISASTERVEHICLES(v) {
    00952     /* primary disaster vehicles that have chosen target */
    00953     if (v->subtype == ST_SMALL_UFO) {
    00954       if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
    00955         /* Revert to target-searching */
    00956         v->current_order.SetDestination(0);
    00957         v->dest_tile = RandomTile();
    00958         v->z_pos = 135;
    00959         v->age = 0;
    00960       }
    00961     }
    00962   }
    00963 }
    00964
    00965 void DisasterVehicle::UpdateDeltaXY(Direction direction)
    00966 {
    00967   this->x_offs        = -1;
    00968   this->y_offs        = -1;
    00969   this->x_extent      =  2;
    00970   this->y_extent      =  2;
    00971   this->z_extent      =  5;
    00972 }