disaster_cmd.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00027 #include "stdafx.h"
00028 
00029 #include "industry.h"
00030 #include "station_base.h"
00031 #include "command_func.h"
00032 #include "news_func.h"
00033 #include "town.h"
00034 #include "company_func.h"
00035 #include "strings_func.h"
00036 #include "date_func.h"
00037 #include "viewport_func.h"
00038 #include "vehicle_func.h"
00039 #include "sound_func.h"
00040 #include "effectvehicle_func.h"
00041 #include "roadveh.h"
00042 #include "ai/ai.hpp"
00043 #include "company_base.h"
00044 #include "core/random_func.hpp"
00045 #include "core/backup_type.hpp"
00046 #include "aircraft.h"
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 inline void AdjustFlyingDisasterVehicleHeight(DisasterVehicle *v)
00127 {
00128   int min_altitude = GetAircraftMinAltitude(v->x_pos, v->y_pos, 0);
00129   int max_altitude = GetAircraftMaxAltitude(v->x_pos, v->y_pos, 0);
00130   int middle_altitude = min_altitude + ((uint)(max_altitude - min_altitude)) / 2;
00131   if (v->z_pos < min_altitude || (v->in_min_height_correction && v->z_pos < middle_altitude)) {
00132     v->in_min_height_correction = true;
00133     v->z_pos += 2;
00134   } else if (v->z_pos > max_altitude || (v->in_max_height_correction && v->z_pos > middle_altitude)) {
00135     v->in_max_height_correction = true;
00136     v->z_pos -= 2;
00137   } else if (v->in_min_height_correction && v->z_pos >= middle_altitude) {
00138     v->in_min_height_correction = false;
00139   } else if (v->in_max_height_correction && v->z_pos <= middle_altitude) {
00140     v->in_max_height_correction = false;
00141   }
00142 }
00143 
00144 static void DisasterVehicleUpdateImage(DisasterVehicle *v)
00145 {
00146   SpriteID img = v->image_override;
00147   if (img == 0) img = _disaster_images[v->subtype][v->direction];
00148   v->cur_image = img;
00149 }
00150 
00155 static void InitializeDisasterVehicle(DisasterVehicle *v, int x, int y, int z, Direction direction, byte subtype)
00156 {
00157   v->x_pos = x;
00158   v->y_pos = y;
00159   v->z_pos = z;
00160   v->tile = TileVirtXY(x, y);
00161   v->direction = direction;
00162   v->subtype = subtype;
00163   v->UpdateDeltaXY(INVALID_DIR);
00164   v->owner = OWNER_NONE;
00165   v->vehstatus = VS_UNCLICKABLE;
00166   v->image_override = 0;
00167   v->current_order.Free();
00168   v->in_min_height_correction = false;
00169   v->in_max_height_correction = false;
00170 
00171   DisasterVehicleUpdateImage(v);
00172   VehicleMove(v, false);
00173   MarkSingleVehicleDirty(v);
00174 }
00175 
00176 static void SetDisasterVehiclePos(DisasterVehicle *v, int x, int y, int z)
00177 {
00178   v->x_pos = x;
00179   v->y_pos = y;
00180   v->z_pos = z;
00181   v->tile = TileVirtXY(x, y);
00182 
00183   DisasterVehicleUpdateImage(v);
00184   VehicleMove(v, true);
00185 
00186   DisasterVehicle *u = v->Next();
00187   if (u != NULL) {
00188     int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
00189     int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
00190 
00191     u->x_pos = x;
00192     u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);
00193     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
00194     u->z_pos = GetSlopeZ(safe_x, safe_y);
00195     u->direction = v->direction;
00196 
00197     DisasterVehicleUpdateImage(u);
00198     VehicleMove(u, true);
00199 
00200     if ((u = u->Next()) != NULL) {
00201       u->x_pos = x;
00202       u->y_pos = y;
00203       u->z_pos = z + 5;
00204       VehicleMove(u, true);
00205     }
00206   }
00207 }
00208 
00217 static bool DisasterTick_Zeppeliner(DisasterVehicle *v)
00218 {
00219   v->tick_counter++;
00220 
00221   if (v->current_order.GetDestination() < 2) {
00222     if (HasBit(v->tick_counter, 0)) return true;
00223 
00224     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00225 
00226     AdjustFlyingDisasterVehicleHeight(v);
00227     SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00228 
00229     if (v->current_order.GetDestination() == 1) {
00230       if (++v->age == 38) {
00231         v->current_order.SetDestination(2);
00232         v->age = 0;
00233       }
00234 
00235       if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_CRASH_SMOKE);
00236 
00237     } else if (v->current_order.GetDestination() == 0) {
00238       if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
00239         v->current_order.SetDestination(1);
00240         v->age = 0;
00241 
00242         SetDParam(0, GetStationIndex(v->tile));
00243         AddVehicleNewsItem(STR_NEWS_DISASTER_ZEPPELIN,
00244           NS_ACCIDENT,
00245           v->index); // Delete the news, when the zeppelin is gone
00246         AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCrashed(GetStationIndex(v->tile)));
00247       }
00248     }
00249 
00250     if (v->y_pos >= (int)((MapSizeY() + 9) * TILE_SIZE - 1)) {
00251       delete v;
00252       return false;
00253     }
00254 
00255     return true;
00256   }
00257 
00258   if (v->current_order.GetDestination() > 2) {
00259     if (++v->age <= 13320) return true;
00260 
00261     if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
00262       Station *st = Station::GetByTile(v->tile);
00263       CLRBITS(st->airport.flags, RUNWAY_IN_block);
00264       AI::NewEvent(GetTileOwner(v->tile), new AIEventDisasterZeppelinerCleared(st->index));
00265     }
00266 
00267     SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
00268     delete v;
00269     return false;
00270   }
00271 
00272   int x = v->x_pos;
00273   int y = v->y_pos;
00274   int z = GetSlopeZ(x, y);
00275   if (z < v->z_pos) z = v->z_pos - 1;
00276   SetDisasterVehiclePos(v, x, y, z);
00277 
00278   if (++v->age == 1) {
00279     CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
00280     SndPlayVehicleFx(SND_12_EXPLOSION, v);
00281     v->image_override = SPR_BLIMP_CRASHING;
00282   } else if (v->age == 70) {
00283     v->image_override = SPR_BLIMP_CRASHED;
00284   } else if (v->age <= 300) {
00285     if (GB(v->tick_counter, 0, 3) == 0) {
00286       uint32 r = Random();
00287 
00288       CreateEffectVehicleRel(v,
00289         GB(r, 0, 4) - 7,
00290         GB(r, 4, 4) - 7,
00291         GB(r, 8, 3) + 5,
00292         EV_EXPLOSION_SMALL);
00293     }
00294   } else if (v->age == 350) {
00295     v->current_order.SetDestination(3);
00296     v->age = 0;
00297   }
00298 
00299   if (IsValidTile(v->tile) && IsAirportTile(v->tile)) {
00300     SETBITS(Station::GetByTile(v->tile)->airport.flags, RUNWAY_IN_block);
00301   }
00302 
00303   return true;
00304 }
00305 
00312 static bool DisasterTick_Ufo(DisasterVehicle *v)
00313 {
00314   v->image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
00315 
00316   if (v->current_order.GetDestination() == 0) {
00317     /* Fly around randomly */
00318     int x = TileX(v->dest_tile) * TILE_SIZE;
00319     int y = TileY(v->dest_tile) * TILE_SIZE;
00320     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
00321       v->direction = GetDirectionTowards(v, x, y);
00322       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00323       AdjustFlyingDisasterVehicleHeight(v);
00324       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00325       return true;
00326     }
00327     if (++v->age < 6) {
00328       v->dest_tile = RandomTile();
00329       return true;
00330     }
00331     v->current_order.SetDestination(1);
00332 
00333     uint n = 0; // Total number of targetable road vehicles.
00334     RoadVehicle *u;
00335     FOR_ALL_ROADVEHICLES(u) {
00336       if (u->IsFrontEngine()) n++;
00337     }
00338 
00339     if (n == 0) {
00340       /* If there are no targetable road vehicles, destroy the UFO. */
00341       delete v;
00342       return false;
00343     }
00344 
00345     n = RandomRange(n); // Choose one of them.
00346     FOR_ALL_ROADVEHICLES(u) {
00347       /* Find (n+1)-th road vehicle. */
00348       if (u->IsFrontEngine() && (n-- == 0)) break;
00349     }
00350 
00351     /* Target it. */
00352     v->dest_tile = u->index;
00353     v->age = 0;
00354     return true;
00355   } else {
00356     /* Target a vehicle */
00357     RoadVehicle *u = RoadVehicle::Get(v->dest_tile);
00358     assert(u != NULL && u->type == VEH_ROAD && u->IsFrontEngine());
00359 
00360     uint dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
00361 
00362     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
00363       u->breakdown_type = BREAKDOWN_CRITICAL;
00364       u->breakdown_ctr = 3;
00365       u->breakdown_delay = 140;
00366     }
00367 
00368     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
00369     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00370 
00371     int z = v->z_pos;
00372     if (dist <= TILE_SIZE && z > u->z_pos) z--;
00373     SetDisasterVehiclePos(v, gp.x, gp.y, z);
00374 
00375     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
00376       v->age++;
00377       if (u->crashed_ctr == 0) {
00378         u->Crash();
00379 
00380         AddVehicleNewsItem(STR_NEWS_DISASTER_SMALL_UFO,
00381           NS_ACCIDENT,
00382           u->index); // delete the news, when the roadvehicle is gone
00383 
00384         AI::NewEvent(u->owner, new AIEventVehicleCrashed(u->index, u->tile, AIEventVehicleCrashed::CRASH_RV_UFO));
00385       }
00386     }
00387 
00388     /* Destroy? */
00389     if (v->age > 50) {
00390       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
00391       SndPlayVehicleFx(SND_12_EXPLOSION, v);
00392       delete v;
00393       return false;
00394     }
00395   }
00396 
00397   return true;
00398 }
00399 
00400 static void DestructIndustry(Industry *i)
00401 {
00402   for (TileIndex tile = 0; tile != MapSize(); tile++) {
00403     if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {
00404       ResetIndustryConstructionStage(tile);
00405       MarkTileDirtyByTile(tile);
00406     }
00407   }
00408 }
00409 
00423 static bool DisasterTick_Aircraft(DisasterVehicle *v, uint16 image_override, bool leave_at_top, StringID news_message, IndustryBehaviour industry_flag)
00424 {
00425   v->tick_counter++;
00426   v->image_override = (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? image_override : 0;
00427 
00428   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00429   AdjustFlyingDisasterVehicleHeight(v);
00430   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00431 
00432   if ((leave_at_top && gp.x < (-10 * (int)TILE_SIZE)) || (!leave_at_top && gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1)) {
00433     delete v;
00434     return false;
00435   }
00436 
00437   if (v->current_order.GetDestination() == 2) {
00438     if (GB(v->tick_counter, 0, 2) == 0) {
00439       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
00440       int x = TileX(i->location.tile) * TILE_SIZE;
00441       int y = TileY(i->location.tile) * TILE_SIZE;
00442       uint32 r = Random();
00443 
00444       CreateEffectVehicleAbove(
00445         GB(r,  0, 6) + x,
00446         GB(r,  6, 6) + y,
00447         GB(r, 12, 4),
00448         EV_EXPLOSION_SMALL);
00449 
00450       if (++v->age >= 55) v->current_order.SetDestination(3);
00451     }
00452   } else if (v->current_order.GetDestination() == 1) {
00453     if (++v->age == 112) {
00454       v->current_order.SetDestination(2);
00455       v->age = 0;
00456 
00457       Industry *i = Industry::Get(v->dest_tile); // Industry destructor calls ReleaseDisastersTargetingIndustry, so this is valid
00458       DestructIndustry(i);
00459 
00460       SetDParam(0, i->town->index);
00461       AddIndustryNewsItem(news_message, NS_ACCIDENT, i->index); // delete the news, when the industry closes
00462       SndPlayTileFx(SND_12_EXPLOSION, i->location.tile);
00463     }
00464   } else if (v->current_order.GetDestination() == 0) {
00465     int x = v->x_pos + ((leave_at_top ? -15 : 15) * TILE_SIZE);
00466     int y = v->y_pos;
00467 
00468     if ((uint)x > MapMaxX() * TILE_SIZE - 1) return true;
00469 
00470     TileIndex tile = TileVirtXY(x, y);
00471     if (!IsTileType(tile, MP_INDUSTRY)) return true;
00472 
00473     IndustryID ind = GetIndustryIndex(tile);
00474     v->dest_tile = ind;
00475 
00476     if (GetIndustrySpec(Industry::Get(ind)->type)->behaviour & industry_flag) {
00477       v->current_order.SetDestination(1);
00478       v->age = 0;
00479     }
00480   }
00481 
00482   return true;
00483 }
00484 
00486 static bool DisasterTick_Airplane(DisasterVehicle *v)
00487 {
00488   return DisasterTick_Aircraft(v, SPR_F_15_FIRING, true, STR_NEWS_DISASTER_AIRPLANE_OIL_REFINERY, INDUSTRYBEH_AIRPLANE_ATTACKS);
00489 }
00490 
00492 static bool DisasterTick_Helicopter(DisasterVehicle *v)
00493 {
00494   return DisasterTick_Aircraft(v, SPR_AH_64A_FIRING, false, STR_NEWS_DISASTER_HELICOPTER_FACTORY, INDUSTRYBEH_CHOPPER_ATTACKS);
00495 }
00496 
00498 static bool DisasterTick_Helicopter_Rotors(DisasterVehicle *v)
00499 {
00500   v->tick_counter++;
00501   if (HasBit(v->tick_counter, 0)) return true;
00502 
00503   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
00504 
00505   VehicleMove(v, true);
00506 
00507   return true;
00508 }
00509 
00516 static bool DisasterTick_Big_Ufo(DisasterVehicle *v)
00517 {
00518   v->tick_counter++;
00519 
00520   if (v->current_order.GetDestination() == 1) {
00521     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
00522     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
00523     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
00524       v->direction = GetDirectionTowards(v, x, y);
00525 
00526       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00527       AdjustFlyingDisasterVehicleHeight(v);
00528       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00529       return true;
00530     }
00531 
00532     if (!IsValidTile(v->dest_tile)) {
00533       /* Make sure we don't land outside the map. */
00534       delete v;
00535       return false;
00536     }
00537 
00538     int z = GetSlopeZ(v->x_pos, v->y_pos);
00539     if (z < v->z_pos) {
00540       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
00541       return true;
00542     }
00543 
00544     v->current_order.SetDestination(2);
00545 
00546     Vehicle *target;
00547     FOR_ALL_VEHICLES(target) {
00548       if (target->IsGroundVehicle()) {
00549         if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * (int)TILE_SIZE) {
00550           target->breakdown_ctr = 5;
00551           target->breakdown_delay = 0xF0;
00552           target->breakdown_type = BREAKDOWN_CRITICAL;
00553         }
00554       }
00555     }
00556 
00557     Town *t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
00558     SetDParam(0, t->index);
00559     AddNewsItem(STR_NEWS_DISASTER_BIG_UFO,
00560       NS_ACCIDENT,
00561       NR_TILE,
00562       v->tile);
00563 
00564     if (!Vehicle::CanAllocateItem(2)) {
00565       delete v;
00566       return false;
00567     }
00568     DisasterVehicle *u = new DisasterVehicle();
00569 
00570     InitializeDisasterVehicle(u, -6 * (int)TILE_SIZE, v->y_pos, INITIAL_DISASTER_VEHICLE_ZPOS, DIR_SW, ST_BIG_UFO_DESTROYER);
00571     u->big_ufo_destroyer_target = v->index;
00572 
00573     DisasterVehicle *w = new DisasterVehicle();
00574 
00575     u->SetNext(w);
00576     InitializeDisasterVehicle(w, -6 * (int)TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
00577     w->vehstatus |= VS_SHADOW;
00578   } else if (v->current_order.GetDestination() == 0) {
00579     int x = TileX(v->dest_tile) * TILE_SIZE;
00580     int y = TileY(v->dest_tile) * TILE_SIZE;
00581     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= (int)TILE_SIZE) {
00582       v->direction = GetDirectionTowards(v, x, y);
00583       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00584       AdjustFlyingDisasterVehicleHeight(v);
00585       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00586       return true;
00587     }
00588 
00589     if (++v->age < 6) {
00590       v->dest_tile = RandomTile();
00591       return true;
00592     }
00593     v->current_order.SetDestination(1);
00594 
00595     TileIndex tile_org = RandomTile();
00596     TileIndex tile = tile_org;
00597     do {
00598       if (IsPlainRailTile(tile) &&
00599           Company::IsHumanID(GetTileOwner(tile))) {
00600         break;
00601       }
00602       tile = TILE_MASK(tile + 1);
00603     } while (tile != tile_org);
00604     v->dest_tile = tile;
00605     v->age = 0;
00606   }
00607 
00608   return true;
00609 }
00610 
00615 static bool DisasterTick_Big_Ufo_Destroyer(DisasterVehicle *v)
00616 {
00617   v->tick_counter++;
00618 
00619   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00620   AdjustFlyingDisasterVehicleHeight(v);
00621   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00622 
00623   if (gp.x > (int)(MapSizeX() * TILE_SIZE + 9 * TILE_SIZE) - 1) {
00624     delete v;
00625     return false;
00626   }
00627 
00628   if (v->current_order.GetDestination() == 0) {
00629     Vehicle *u = Vehicle::Get(v->big_ufo_destroyer_target);
00630     if (Delta(v->x_pos, u->x_pos) > (int)TILE_SIZE) return true;
00631     v->current_order.SetDestination(1);
00632 
00633     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
00634     SndPlayVehicleFx(SND_12_EXPLOSION, u);
00635 
00636     delete u;
00637 
00638     for (int i = 0; i != 80; i++) {
00639       uint32 r = Random();
00640       CreateEffectVehicleAbove(
00641         GB(r, 0, 6) + v->x_pos - 32,
00642         GB(r, 5, 6) + v->y_pos - 32,
00643         0,
00644         EV_EXPLOSION_SMALL);
00645     }
00646 
00647     for (int dy = -3; dy < 3; dy++) {
00648       for (int dx = -3; dx < 3; dx++) {
00649         TileIndex tile = TileAddWrap(v->tile, dx, dy);
00650         if (tile != INVALID_TILE) DisasterClearSquare(tile);
00651       }
00652     }
00653   }
00654 
00655   return true;
00656 }
00657 
00662 static bool DisasterTick_Submarine(DisasterVehicle *v)
00663 {
00664   v->tick_counter++;
00665 
00666   if (++v->age > 8880) {
00667     delete v;
00668     return false;
00669   }
00670 
00671   if (!HasBit(v->tick_counter, 0)) return true;
00672 
00673   TileIndex tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
00674   if (IsValidTile(tile)) {
00675     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
00676     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
00677       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00678       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00679       return true;
00680     }
00681   }
00682 
00683   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
00684 
00685   return true;
00686 }
00687 
00688 
00689 static bool DisasterTick_NULL(DisasterVehicle *v)
00690 {
00691   return true;
00692 }
00693 
00694 typedef bool DisasterVehicleTickProc(DisasterVehicle *v);
00695 
00696 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
00697   DisasterTick_Zeppeliner, DisasterTick_NULL,
00698   DisasterTick_Ufo,        DisasterTick_NULL,
00699   DisasterTick_Airplane,   DisasterTick_NULL,
00700   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
00701   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
00702   DisasterTick_NULL,
00703   DisasterTick_Submarine,
00704   DisasterTick_Submarine,
00705 };
00706 
00707 
00708 bool DisasterVehicle::Tick()
00709 {
00710   return _disastervehicle_tick_procs[this->subtype](this);
00711 }
00712 
00713 typedef void DisasterInitProc();
00714 
00715 
00720 static void Disaster_Zeppeliner_Init()
00721 {
00722   if (!Vehicle::CanAllocateItem(2)) return;
00723 
00724   /* Pick a random place, unless we find a small airport */
00725   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00726 
00727   Station *st;
00728   FOR_ALL_STATIONS(st) {
00729     if (st->airport.tile != INVALID_TILE && (st->airport.type == AT_SMALL || st->airport.type == AT_LARGE)) {
00730       x = (TileX(st->airport.tile) + 2) * TILE_SIZE;
00731       break;
00732     }
00733   }
00734 
00735   DisasterVehicle *v = new DisasterVehicle();
00736   int z = GetAircraftMinAltitude(x, 0, 0);
00737   InitializeDisasterVehicle(v, x, 0, z, DIR_SE, ST_ZEPPELINER);
00738 
00739   /* Allocate shadow */
00740   DisasterVehicle *u = new DisasterVehicle();
00741   v->SetNext(u);
00742   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
00743   u->vehstatus |= VS_SHADOW;
00744 }
00745 
00746 
00751 static void Disaster_Small_Ufo_Init()
00752 {
00753   if (!Vehicle::CanAllocateItem(2)) return;
00754 
00755   DisasterVehicle *v = new DisasterVehicle();
00756   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00757 
00758   int z = GetAircraftMinAltitude(x, 0, 0);
00759   InitializeDisasterVehicle(v, x, 0, z, DIR_SE, ST_SMALL_UFO);
00760   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
00761   v->age = 0;
00762 
00763   /* Allocate shadow */
00764   DisasterVehicle *u = new DisasterVehicle();
00765   v->SetNext(u);
00766   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
00767   u->vehstatus |= VS_SHADOW;
00768 }
00769 
00770 
00771 /* Combat airplane which destroys an oil refinery */
00772 static void Disaster_Airplane_Init()
00773 {
00774   if (!Vehicle::CanAllocateItem(2)) return;
00775 
00776   Industry *i, *found = NULL;
00777 
00778   FOR_ALL_INDUSTRIES(i) {
00779     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
00780         (found == NULL || Chance16(1, 2))) {
00781       found = i;
00782     }
00783   }
00784 
00785   if (found == NULL) return;
00786 
00787   DisasterVehicle *v = new DisasterVehicle();
00788 
00789   /* Start from the bottom (south side) of the map */
00790   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
00791   int y = TileY(found->location.tile) * TILE_SIZE + 37;
00792 
00793   int z = GetAircraftMinAltitude(x, y, 0);
00794   InitializeDisasterVehicle(v, x, y, z, DIR_NE, ST_AIRPLANE);
00795 
00796   DisasterVehicle *u = new DisasterVehicle();
00797   v->SetNext(u);
00798   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
00799   u->vehstatus |= VS_SHADOW;
00800 }
00801 
00802 
00804 static void Disaster_Helicopter_Init()
00805 {
00806   if (!Vehicle::CanAllocateItem(3)) return;
00807 
00808   Industry *i, *found = NULL;
00809 
00810   FOR_ALL_INDUSTRIES(i) {
00811     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
00812         (found == NULL || Chance16(1, 2))) {
00813       found = i;
00814     }
00815   }
00816 
00817   if (found == NULL) return;
00818 
00819   DisasterVehicle *v = new DisasterVehicle();
00820 
00821   int x = -16 * (int)TILE_SIZE;
00822   int y = TileY(found->location.tile) * TILE_SIZE + 37;
00823 
00824   int z = GetAircraftMinAltitude(x, y, 0);
00825   InitializeDisasterVehicle(v, x, y, z, DIR_SW, ST_HELICOPTER);
00826 
00827   DisasterVehicle *u = new DisasterVehicle();
00828   v->SetNext(u);
00829   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
00830   u->vehstatus |= VS_SHADOW;
00831 
00832   DisasterVehicle *w = new DisasterVehicle();
00833   u->SetNext(w);
00834   InitializeDisasterVehicle(w, x, y, z + 5, DIR_SW, ST_HELICOPTER_ROTORS);
00835 }
00836 
00837 
00838 /* Big Ufo which lands on a piece of rail and will consequently be shot
00839  * down by a combat airplane, destroying the surroundings */
00840 static void Disaster_Big_Ufo_Init()
00841 {
00842   if (!Vehicle::CanAllocateItem(2)) return;
00843 
00844   DisasterVehicle *v = new DisasterVehicle();
00845   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00846   int y = MapMaxX() * TILE_SIZE - 1;
00847 
00848   int z = GetAircraftMinAltitude(x, y, 0);
00849   InitializeDisasterVehicle(v, x, y, z, DIR_NW, ST_BIG_UFO);
00850   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
00851   v->age = 0;
00852 
00853   /* Allocate shadow */
00854   DisasterVehicle *u = new DisasterVehicle();
00855   v->SetNext(u);
00856   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
00857   u->vehstatus |= VS_SHADOW;
00858 }
00859 
00860 
00861 static void Disaster_Submarine_Init(DisasterSubType subtype)
00862 {
00863   if (!Vehicle::CanAllocateItem()) return;
00864 
00865   int y;
00866   Direction dir;
00867   uint32 r = Random();
00868   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
00869 
00870   if (HasBit(r, 31)) {
00871     y = MapMaxY() * TILE_SIZE - TILE_SIZE / 2 - 1;
00872     dir = DIR_NW;
00873   } else {
00874     y = TILE_SIZE / 2;
00875     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
00876     dir = DIR_SE;
00877   }
00878   if (!IsWaterTile(TileVirtXY(x, y))) return;
00879 
00880   DisasterVehicle *v = new DisasterVehicle();
00881   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
00882   v->age = 0;
00883 }
00884 
00885 /* Curious submarine #1, just floats around */
00886 static void Disaster_Small_Submarine_Init()
00887 {
00888   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
00889 }
00890 
00891 
00892 /* Curious submarine #2, just floats around */
00893 static void Disaster_Big_Submarine_Init()
00894 {
00895   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
00896 }
00897 
00898 
00903 static void Disaster_CoalMine_Init()
00904 {
00905   int index = GB(Random(), 0, 4);
00906   uint m;
00907 
00908   for (m = 0; m < 15; m++) {
00909     const Industry *i;
00910 
00911     FOR_ALL_INDUSTRIES(i) {
00912       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
00913         SetDParam(0, i->town->index);
00914         AddNewsItem(STR_NEWS_DISASTER_COAL_MINE_SUBSIDENCE,
00915           NS_ACCIDENT, NR_TILE, i->location.tile + TileDiffXY(1, 1)); // keep the news, even when the mine closes
00916 
00917         {
00918           TileIndex tile = i->location.tile;
00919           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
00920 
00921           for (uint n = 0; n < 30; n++) {
00922             DisasterClearSquare(tile);
00923             tile += step;
00924             if (!IsValidTile(tile)) break;
00925           }
00926         }
00927         return;
00928       }
00929     }
00930   }
00931 }
00932 
00933 struct Disaster {
00934   DisasterInitProc *init_proc; 
00935   Year min_year;               
00936   Year max_year;               
00937 };
00938 
00939 static const Disaster _disasters[] = {
00940   {Disaster_Zeppeliner_Init,      1930, 1955}, // zeppeliner
00941   {Disaster_Small_Ufo_Init,       1940, 1970}, // ufo (small)
00942   {Disaster_Airplane_Init,        1960, 1990}, // airplane
00943   {Disaster_Helicopter_Init,      1970, 2000}, // helicopter
00944   {Disaster_Big_Ufo_Init,         2000, 2100}, // ufo (big)
00945   {Disaster_Small_Submarine_Init, 1940, 1965}, // submarine (small)
00946   {Disaster_Big_Submarine_Init,   1975, 2010}, // submarine (big)
00947   {Disaster_CoalMine_Init,        1950, 1985}, // coalmine
00948 };
00949 
00950 static void DoDisaster()
00951 {
00952   byte buf[lengthof(_disasters)];
00953 
00954   byte j = 0;
00955   for (size_t i = 0; i != lengthof(_disasters); i++) {
00956     if (_cur_year >= _disasters[i].min_year && _cur_year < _disasters[i].max_year) buf[j++] = (byte)i;
00957   }
00958 
00959   if (j == 0) return;
00960 
00961   _disasters[buf[RandomRange(j)]].init_proc();
00962 }
00963 
00964 
00965 static void ResetDisasterDelay()
00966 {
00967   _disaster_delay = GB(Random(), 0, 9) + 730;
00968 }
00969 
00970 void DisasterDailyLoop()
00971 {
00972   if (--_disaster_delay != 0) return;
00973 
00974   ResetDisasterDelay();
00975 
00976   if (_settings_game.difficulty.disasters != 0) DoDisaster();
00977 }
00978 
00979 void StartupDisasters()
00980 {
00981   ResetDisasterDelay();
00982 }
00983 
00989 void ReleaseDisastersTargetingIndustry(IndustryID i)
00990 {
00991   DisasterVehicle *v;
00992   FOR_ALL_DISASTERVEHICLES(v) {
00993     /* primary disaster vehicles that have chosen target */
00994     if (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER) {
00995       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
00996       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
00997     }
00998   }
00999 }
01000 
01005 void ReleaseDisastersTargetingVehicle(VehicleID vehicle)
01006 {
01007   DisasterVehicle *v;
01008   FOR_ALL_DISASTERVEHICLES(v) {
01009     /* primary disaster vehicles that have chosen target */
01010     if (v->subtype == ST_SMALL_UFO) {
01011       if (v->current_order.GetDestination() != 0 && v->dest_tile == vehicle) {
01012         /* Revert to target-searching */
01013         v->current_order.SetDestination(0);
01014         v->dest_tile = RandomTile();
01015         v->z_pos = INITIAL_DISASTER_VEHICLE_ZPOS;
01016         v->age = 0;
01017       }
01018     }
01019   }
01020 }
01021 
01022 void DisasterVehicle::UpdateDeltaXY(Direction direction)
01023 {
01024   this->x_offs        = -1;
01025   this->y_offs        = -1;
01026   this->x_extent      =  2;
01027   this->y_extent      =  2;
01028   this->z_extent      =  5;
01029 }