disaster_cmd.cpp

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00001 /* $Id: disaster_cmd.cpp 15733 2009-03-15 21:49:37Z yexo $ */
00002 
00019 #include "stdafx.h"
00020 #include "landscape.h"
00021 
00022 #include "industry_map.h"
00023 #include "station_map.h"
00024 #include "command_func.h"
00025 #include "news_func.h"
00026 #include "town.h"
00027 #include "company_func.h"
00028 #include "variables.h"
00029 #include "strings_func.h"
00030 #include "date_func.h"
00031 #include "functions.h"
00032 #include "vehicle_func.h"
00033 #include "sound_func.h"
00034 #include "effectvehicle_func.h"
00035 #include "roadveh.h"
00036 #include "ai/ai.hpp"
00037 
00038 #include "table/strings.h"
00039 #include "table/sprites.h"
00040 
00041 enum DisasterSubType {
00042   ST_ZEPPELINER,
00043   ST_ZEPPELINER_SHADOW,
00044   ST_SMALL_UFO,
00045   ST_SMALL_UFO_SHADOW,
00046   ST_AIRPLANE,
00047   ST_AIRPLANE_SHADOW,
00048   ST_HELICOPTER,
00049   ST_HELICOPTER_SHADOW,
00050   ST_HELICOPTER_ROTORS,
00051   ST_BIG_UFO,
00052   ST_BIG_UFO_SHADOW,
00053   ST_BIG_UFO_DESTROYER,
00054   ST_BIG_UFO_DESTROYER_SHADOW,
00055   ST_SMALL_SUBMARINE,
00056   ST_BIG_SUBMARINE,
00057 };
00058 
00059 static void DisasterClearSquare(TileIndex tile)
00060 {
00061   if (!EnsureNoVehicleOnGround(tile)) return;
00062 
00063   switch (GetTileType(tile)) {
00064     case MP_RAILWAY:
00065       if (IsHumanCompany(GetTileOwner(tile)) && !IsRailWaypoint(tile)) {
00066         CompanyID old_company = _current_company;
00067         _current_company = OWNER_WATER;
00068         DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
00069         _current_company = old_company;
00070 
00071         /* update signals in buffer */
00072         UpdateSignalsInBuffer();
00073       }
00074       break;
00075 
00076     case MP_HOUSE: {
00077       CompanyID old_company = _current_company;
00078       _current_company = OWNER_NONE;
00079       DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
00080       _current_company = old_company;
00081       break;
00082     }
00083 
00084     case MP_TREES:
00085     case MP_CLEAR:
00086       DoClearSquare(tile);
00087       break;
00088 
00089     default:
00090       break;
00091   }
00092 }
00093 
00094 static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};
00095 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};
00096 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};
00097 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};
00098 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};
00099 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};
00100 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};
00101 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};
00102 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};
00103 
00104 static const SpriteID * const _disaster_images[] = {
00105   _disaster_images_1, _disaster_images_1,                     
00106   _disaster_images_2, _disaster_images_2,                     
00107   _disaster_images_3, _disaster_images_3,                     
00108   _disaster_images_8, _disaster_images_8, _disaster_images_9, 
00109   _disaster_images_6, _disaster_images_6,                     
00110   _disaster_images_7, _disaster_images_7,                     
00111   _disaster_images_4, _disaster_images_5,                     
00112 };
00113 
00114 static void DisasterVehicleUpdateImage(Vehicle *v)
00115 {
00116   SpriteID img = v->u.disaster.image_override;
00117   if (img == 0) img = _disaster_images[v->subtype][v->direction];
00118   v->cur_image = img;
00119 }
00120 
00123 static void InitializeDisasterVehicle(Vehicle *v, int x, int y, byte z, Direction direction, byte subtype)
00124 {
00125   v->x_pos = x;
00126   v->y_pos = y;
00127   v->z_pos = z;
00128   v->tile = TileVirtXY(x, y);
00129   v->direction = direction;
00130   v->subtype = subtype;
00131   v->UpdateDeltaXY(INVALID_DIR);
00132   v->owner = OWNER_NONE;
00133   v->vehstatus = VS_UNCLICKABLE;
00134   v->u.disaster.image_override = 0;
00135   v->current_order.Free();
00136 
00137   DisasterVehicleUpdateImage(v);
00138   VehicleMove(v, false);
00139   MarkSingleVehicleDirty(v);
00140 }
00141 
00142 static void SetDisasterVehiclePos(Vehicle *v, int x, int y, byte z)
00143 {
00144   Vehicle *u;
00145 
00146   v->x_pos = x;
00147   v->y_pos = y;
00148   v->z_pos = z;
00149   v->tile = TileVirtXY(x, y);
00150 
00151   DisasterVehicleUpdateImage(v);
00152   VehicleMove(v, true);
00153 
00154   if ((u = v->Next()) != NULL) {
00155     int safe_x = Clamp(x, 0, MapMaxX() * TILE_SIZE);
00156     int safe_y = Clamp(y - 1, 0, MapMaxY() * TILE_SIZE);
00157 
00158     u->x_pos = x;
00159     u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);
00160     safe_y = Clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);
00161     u->z_pos = GetSlopeZ(safe_x, safe_y);
00162     u->direction = v->direction;
00163 
00164     DisasterVehicleUpdateImage(u);
00165     VehicleMove(u, true);
00166 
00167     if ((u = u->Next()) != NULL) {
00168       u->x_pos = x;
00169       u->y_pos = y;
00170       u->z_pos = z + 5;
00171       VehicleMove(u, true);
00172     }
00173   }
00174 }
00175 
00184 static void DisasterTick_Zeppeliner(Vehicle *v)
00185 {
00186   Station *st;
00187   int x, y;
00188   byte z;
00189   TileIndex tile;
00190 
00191   v->tick_counter++;
00192 
00193   if (v->current_order.GetDestination() < 2) {
00194     if (HasBit(v->tick_counter, 0)) return;
00195 
00196     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00197 
00198     SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00199 
00200     if (v->current_order.GetDestination() == 1) {
00201       if (++v->age == 38) {
00202         v->current_order.SetDestination(2);
00203         v->age = 0;
00204       }
00205 
00206       if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_SMOKE);
00207 
00208     } else if (v->current_order.GetDestination() == 0) {
00209       tile = v->tile;
00210 
00211       if (IsValidTile(tile) &&
00212           IsTileType(tile, MP_STATION) &&
00213           IsAirport(tile)) {
00214         v->current_order.SetDestination(1);
00215         v->age = 0;
00216 
00217         SetDParam(0, GetStationIndex(tile));
00218         AddNewsItem(STR_B000_ZEPPELIN_DISASTER_AT,
00219           NS_ACCIDENT_VEHICLE,
00220           v->index,
00221           0);
00222         AI::NewEvent(GetTileOwner(tile), new AIEventDisasterZeppelinerCrashed(GetStationIndex(tile)));
00223       }
00224     }
00225 
00226     if (v->y_pos >= ((int)MapSizeY() + 9) * TILE_SIZE - 1) delete v;
00227     return;
00228   }
00229 
00230   if (v->current_order.GetDestination() > 2) {
00231     if (++v->age <= 13320) return;
00232 
00233     tile = v->tile;
00234 
00235     if (IsValidTile(tile) &&
00236         IsTileType(tile, MP_STATION) &&
00237         IsAirport(tile)) {
00238       st = GetStationByTile(tile);
00239       CLRBITS(st->airport_flags, RUNWAY_IN_block);
00240       AI::NewEvent(GetTileOwner(tile), new AIEventDisasterZeppelinerCleared(st->index));
00241     }
00242 
00243     SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);
00244     delete v;
00245     return;
00246   }
00247 
00248   x = v->x_pos;
00249   y = v->y_pos;
00250   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->u.disaster.image_override = SPR_BLIMP_CRASHING;
00258   } else if (v->age == 70) {
00259     v->u.disaster.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   tile = v->tile;
00276   if (IsValidTile(tile) &&
00277       IsTileType(tile, MP_STATION) &&
00278       IsAirport(tile)) {
00279     st = GetStationByTile(tile);
00280     SETBITS(st->airport_flags, RUNWAY_IN_block);
00281   }
00282 }
00283 
00290 static void DisasterTick_Ufo(Vehicle *v)
00291 {
00292   Vehicle *u;
00293   uint dist;
00294   byte z;
00295 
00296   v->u.disaster.image_override = (HasBit(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;
00297 
00298   if (v->current_order.GetDestination() == 0) {
00299     /* Fly around randomly */
00300     int x = TileX(v->dest_tile) * TILE_SIZE;
00301     int y = TileY(v->dest_tile) * TILE_SIZE;
00302     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
00303       v->direction = GetDirectionTowards(v, x, y);
00304       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00305       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00306       return;
00307     }
00308     if (++v->age < 6) {
00309       v->dest_tile = RandomTile();
00310       return;
00311     }
00312     v->current_order.SetDestination(1);
00313 
00314     FOR_ALL_VEHICLES(u) {
00315       if (u->type == VEH_ROAD && IsRoadVehFront(u)) {
00316         v->dest_tile = u->index;
00317         v->age = 0;
00318         return;
00319       }
00320     }
00321 
00322     delete v;
00323   } else {
00324     /* Target a vehicle */
00325     u = GetVehicle(v->dest_tile);
00326     if (u->type != VEH_ROAD || !IsRoadVehFront(u)) {
00327       delete v;
00328       return;
00329     }
00330 
00331     dist = Delta(v->x_pos, u->x_pos) + Delta(v->y_pos, u->y_pos);
00332 
00333     if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {
00334       u->breakdown_ctr = 3;
00335       u->breakdown_delay = 140;
00336     }
00337 
00338     v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);
00339     GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00340 
00341     z = v->z_pos;
00342     if (dist <= TILE_SIZE && z > u->z_pos) z--;
00343     SetDisasterVehiclePos(v, gp.x, gp.y, z);
00344 
00345     if (z <= u->z_pos && (u->vehstatus & VS_HIDDEN) == 0) {
00346       v->age++;
00347       if (u->u.road.crashed_ctr == 0) {
00348         u->u.road.crashed_ctr++;
00349 
00350         AddNewsItem(STR_B001_ROAD_VEHICLE_DESTROYED,
00351           NS_ACCIDENT_VEHICLE,
00352           u->index,
00353           0);
00354 
00355         AI::NewEvent(u->owner, new AIEventVehicleCrashed(u->index, u->tile, AIEventVehicleCrashed::CRASH_RV_UFO));
00356 
00357         for (Vehicle *w = u; w != NULL; w = w->Next()) {
00358           w->vehstatus |= VS_CRASHED;
00359           MarkSingleVehicleDirty(w);
00360         }
00361       }
00362     }
00363 
00364     /* Destroy? */
00365     if (v->age > 50) {
00366       CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);
00367       SndPlayVehicleFx(SND_12_EXPLOSION, v);
00368       delete v;
00369     }
00370   }
00371 }
00372 
00373 static void DestructIndustry(Industry *i)
00374 {
00375   TileIndex tile;
00376 
00377   for (tile = 0; tile != MapSize(); tile++) {
00378     if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {
00379       ResetIndustryConstructionStage(tile);
00380       MarkTileDirtyByTile(tile);
00381     }
00382   }
00383 }
00384 
00393 static void DisasterTick_Airplane(Vehicle *v)
00394 {
00395   v->tick_counter++;
00396   v->u.disaster.image_override =
00397     (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? SPR_F_15_FIRING : 0;
00398 
00399   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00400   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00401 
00402   if (gp.x < (-10 * TILE_SIZE)) {
00403     delete v;
00404     return;
00405   }
00406 
00407   if (v->current_order.GetDestination() == 2) {
00408     if (GB(v->tick_counter, 0, 2) == 0) {
00409       Industry *i = GetIndustry(v->dest_tile);
00410       int x = TileX(i->xy) * TILE_SIZE;
00411       int y = TileY(i->xy) * TILE_SIZE;
00412       uint32 r = Random();
00413 
00414       CreateEffectVehicleAbove(
00415         GB(r,  0, 6) + x,
00416         GB(r,  6, 6) + y,
00417         GB(r, 12, 4),
00418         EV_EXPLOSION_SMALL);
00419 
00420       if (++v->age >= 55) v->current_order.SetDestination(3);
00421     }
00422   } else if (v->current_order.GetDestination() == 1) {
00423     if (++v->age == 112) {
00424       Industry *i;
00425 
00426       v->current_order.SetDestination(2);
00427       v->age = 0;
00428 
00429       i = GetIndustry(v->dest_tile);
00430       DestructIndustry(i);
00431 
00432       SetDParam(0, i->town->index);
00433       AddNewsItem(STR_B002_OIL_REFINERY_EXPLOSION, NS_ACCIDENT_TILE, i->xy, 0);
00434       SndPlayTileFx(SND_12_EXPLOSION, i->xy);
00435     }
00436   } else if (v->current_order.GetDestination() == 0) {
00437     int x, y;
00438     TileIndex tile;
00439     uint ind;
00440 
00441     x = v->x_pos - (15 * TILE_SIZE);
00442     y = v->y_pos;
00443 
00444     if ( (uint)x > MapMaxX() * TILE_SIZE - 1) return;
00445 
00446     tile = TileVirtXY(x, y);
00447     if (!IsTileType(tile, MP_INDUSTRY)) return;
00448 
00449     ind = GetIndustryIndex(tile);
00450     v->dest_tile = ind;
00451 
00452     if (GetIndustrySpec(GetIndustry(ind)->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) {
00453       v->current_order.SetDestination(1);
00454       v->age = 0;
00455     }
00456   }
00457 }
00458 
00466 static void DisasterTick_Helicopter(Vehicle *v)
00467 {
00468   v->tick_counter++;
00469   v->u.disaster.image_override =
00470     (v->current_order.GetDestination() == 1 && HasBit(v->tick_counter, 2)) ? SPR_AH_64A_FIRING : 0;
00471 
00472   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00473   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00474 
00475   if (gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1) {
00476     delete v;
00477     return;
00478   }
00479 
00480   if (v->current_order.GetDestination() == 2) {
00481     if (GB(v->tick_counter, 0, 2) == 0) {
00482       Industry *i = GetIndustry(v->dest_tile);
00483       int x = TileX(i->xy) * TILE_SIZE;
00484       int y = TileY(i->xy) * TILE_SIZE;
00485       uint32 r = Random();
00486 
00487       CreateEffectVehicleAbove(
00488         GB(r,  0, 6) + x,
00489         GB(r,  6, 6) + y,
00490         GB(r, 12, 4),
00491         EV_EXPLOSION_SMALL);
00492 
00493       if (++v->age >= 55) v->current_order.SetDestination(3);
00494     }
00495   } else if (v->current_order.GetDestination() == 1) {
00496     if (++v->age == 112) {
00497       Industry *i;
00498 
00499       v->current_order.SetDestination(2);
00500       v->age = 0;
00501 
00502       i = GetIndustry(v->dest_tile);
00503       DestructIndustry(i);
00504 
00505       SetDParam(0, i->town->index);
00506       AddNewsItem(STR_B003_FACTORY_DESTROYED_IN_SUSPICIOUS, NS_ACCIDENT_TILE, i->xy, 0);
00507       SndPlayTileFx(SND_12_EXPLOSION, i->xy);
00508     }
00509   } else if (v->current_order.GetDestination() == 0) {
00510     int x, y;
00511     TileIndex tile;
00512     uint ind;
00513 
00514     x = v->x_pos + (15 * TILE_SIZE);
00515     y = v->y_pos;
00516 
00517     if ( (uint)x > MapMaxX() * TILE_SIZE - 1) return;
00518 
00519     tile = TileVirtXY(x, y);
00520     if (!IsTileType(tile, MP_INDUSTRY)) return;
00521 
00522     ind = GetIndustryIndex(tile);
00523     v->dest_tile = ind;
00524 
00525     if (GetIndustrySpec(GetIndustry(ind)->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) {
00526       v->current_order.SetDestination(1);
00527       v->age = 0;
00528     }
00529   }
00530 }
00531 
00533 static void DisasterTick_Helicopter_Rotors(Vehicle *v)
00534 {
00535   v->tick_counter++;
00536   if (HasBit(v->tick_counter, 0)) return;
00537 
00538   if (++v->cur_image > SPR_ROTOR_MOVING_3) v->cur_image = SPR_ROTOR_MOVING_1;
00539 
00540   VehicleMove(v, true);
00541 }
00542 
00549 static void DisasterTick_Big_Ufo(Vehicle *v)
00550 {
00551   byte z;
00552   Town *t;
00553   TileIndex tile;
00554   TileIndex tile_org;
00555 
00556   v->tick_counter++;
00557 
00558   if (v->current_order.GetDestination() == 1) {
00559     int x = TileX(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
00560     int y = TileY(v->dest_tile) * TILE_SIZE + TILE_SIZE / 2;
00561     if (Delta(v->x_pos, x) + Delta(v->y_pos, y) >= 8) {
00562       v->direction = GetDirectionTowards(v, x, y);
00563 
00564       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00565       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00566       return;
00567     }
00568 
00569     z = GetSlopeZ(v->x_pos, v->y_pos);
00570     if (z < v->z_pos) {
00571       SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos - 1);
00572       return;
00573     }
00574 
00575     v->current_order.SetDestination(2);
00576 
00577     Vehicle *u;
00578     FOR_ALL_VEHICLES(u) {
00579       if (u->type == VEH_TRAIN || u->type == VEH_ROAD) {
00580         if (Delta(u->x_pos, v->x_pos) + Delta(u->y_pos, v->y_pos) <= 12 * TILE_SIZE) {
00581           u->breakdown_ctr = 5;
00582           u->breakdown_delay = 0xF0;
00583         }
00584       }
00585     }
00586 
00587     t = ClosestTownFromTile(v->dest_tile, UINT_MAX);
00588     SetDParam(0, t->index);
00589     AddNewsItem(STR_B004_UFO_LANDS_NEAR,
00590       NS_ACCIDENT_TILE,
00591       v->tile,
00592       0);
00593 
00594     if (!Vehicle::CanAllocateItem(2)) {
00595       delete v;
00596       return;
00597     }
00598     u = new DisasterVehicle();
00599 
00600     InitializeDisasterVehicle(u, -6 * TILE_SIZE, v->y_pos, 135, DIR_SW, ST_BIG_UFO_DESTROYER);
00601     u->u.disaster.big_ufo_destroyer_target = v->index;
00602 
00603     Vehicle *w = new DisasterVehicle();
00604 
00605     u->SetNext(w);
00606     InitializeDisasterVehicle(w, -6 * TILE_SIZE, v->y_pos, 0, DIR_SW, ST_BIG_UFO_DESTROYER_SHADOW);
00607     w->vehstatus |= VS_SHADOW;
00608   } else if (v->current_order.GetDestination() == 0) {
00609     int x = TileX(v->dest_tile) * TILE_SIZE;
00610     int y = TileY(v->dest_tile) * TILE_SIZE;
00611     if (Delta(x, v->x_pos) + Delta(y, v->y_pos) >= TILE_SIZE) {
00612       v->direction = GetDirectionTowards(v, x, y);
00613       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00614       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00615       return;
00616     }
00617 
00618     if (++v->age < 6) {
00619       v->dest_tile = RandomTile();
00620       return;
00621     }
00622     v->current_order.SetDestination(1);
00623 
00624     tile_org = tile = RandomTile();
00625     do {
00626       if (IsTileType(tile, MP_RAILWAY) &&
00627           IsPlainRailTile(tile) &&
00628           IsHumanCompany(GetTileOwner(tile))) {
00629         break;
00630       }
00631       tile = TILE_MASK(tile + 1);
00632     } while (tile != tile_org);
00633     v->dest_tile = tile;
00634     v->age = 0;
00635   } else {
00636     return;
00637   }
00638 }
00639 
00644 static void DisasterTick_Big_Ufo_Destroyer(Vehicle *v)
00645 {
00646   Vehicle *u;
00647   int i;
00648 
00649   v->tick_counter++;
00650 
00651   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00652   SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00653 
00654   if (gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1) {
00655     delete v;
00656     return;
00657   }
00658 
00659   if (v->current_order.GetDestination() == 0) {
00660     u = GetVehicle(v->u.disaster.big_ufo_destroyer_target);
00661     if (Delta(v->x_pos, u->x_pos) > TILE_SIZE) return;
00662     v->current_order.SetDestination(1);
00663 
00664     CreateEffectVehicleRel(u, 0, 7, 8, EV_EXPLOSION_LARGE);
00665     SndPlayVehicleFx(SND_12_EXPLOSION, u);
00666 
00667     delete u;
00668 
00669     for (i = 0; i != 80; i++) {
00670       uint32 r = Random();
00671       CreateEffectVehicleAbove(
00672         GB(r, 0, 6) + v->x_pos - 32,
00673         GB(r, 5, 6) + v->y_pos - 32,
00674         0,
00675         EV_EXPLOSION_SMALL);
00676     }
00677 
00678     for (int dy = -3; dy < 3; dy++) {
00679       for (int dx = -3; dx < 3; dx++) {
00680         TileIndex tile = TileAddWrap(v->tile, dx, dy);
00681         if (tile != INVALID_TILE) DisasterClearSquare(tile);
00682       }
00683     }
00684   }
00685 }
00686 
00691 static void DisasterTick_Submarine(Vehicle *v)
00692 {
00693   TileIndex tile;
00694 
00695   v->tick_counter++;
00696 
00697   if (++v->age > 8880) {
00698     delete v;
00699     return;
00700   }
00701 
00702   if (!HasBit(v->tick_counter, 0)) return;
00703 
00704   tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
00705   if (IsValidTile(tile)) {
00706     TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
00707     if (trackbits == TRACK_BIT_ALL && !Chance16(1, 90)) {
00708       GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00709       SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);
00710       return;
00711     }
00712   }
00713 
00714   v->direction = ChangeDir(v->direction, GB(Random(), 0, 1) ? DIRDIFF_90RIGHT : DIRDIFF_90LEFT);
00715 }
00716 
00717 
00718 static void DisasterTick_NULL(Vehicle *v) {}
00719 typedef void DisasterVehicleTickProc(Vehicle *v);
00720 
00721 static DisasterVehicleTickProc * const _disastervehicle_tick_procs[] = {
00722   DisasterTick_Zeppeliner, DisasterTick_NULL,
00723   DisasterTick_Ufo,        DisasterTick_NULL,
00724   DisasterTick_Airplane,   DisasterTick_NULL,
00725   DisasterTick_Helicopter, DisasterTick_NULL, DisasterTick_Helicopter_Rotors,
00726   DisasterTick_Big_Ufo,    DisasterTick_NULL, DisasterTick_Big_Ufo_Destroyer,
00727   DisasterTick_NULL,
00728   DisasterTick_Submarine,
00729   DisasterTick_Submarine,
00730 };
00731 
00732 
00733 void DisasterVehicle::Tick()
00734 {
00735   _disastervehicle_tick_procs[this->subtype](this);
00736 }
00737 
00738 typedef void DisasterInitProc();
00739 
00740 
00743 static void Disaster_Zeppeliner_Init()
00744 {
00745   if (!Vehicle::CanAllocateItem(2)) return;
00746 
00747   Vehicle *v = new DisasterVehicle();
00748   Station *st;
00749 
00750   /* Pick a random place, unless we find a small airport */
00751   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00752 
00753   FOR_ALL_STATIONS(st) {
00754     if (st->airport_tile != INVALID_TILE && (st->airport_type == AT_SMALL || st->airport_type == AT_LARGE)) {
00755       x = (TileX(st->airport_tile) + 2) * TILE_SIZE;
00756       break;
00757     }
00758   }
00759 
00760   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_ZEPPELINER);
00761 
00762   /* Allocate shadow */
00763   Vehicle *u = new DisasterVehicle();
00764   v->SetNext(u);
00765   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_ZEPPELINER_SHADOW);
00766   u->vehstatus |= VS_SHADOW;
00767 }
00768 
00769 
00772 static void Disaster_Small_Ufo_Init()
00773 {
00774   if (!Vehicle::CanAllocateItem(2)) return;
00775 
00776   Vehicle *v = new DisasterVehicle();
00777   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00778 
00779   InitializeDisasterVehicle(v, x, 0, 135, DIR_SE, ST_SMALL_UFO);
00780   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
00781   v->age = 0;
00782 
00783   /* Allocate shadow */
00784   Vehicle *u = new DisasterVehicle();
00785   v->SetNext(u);
00786   InitializeDisasterVehicle(u, x, 0, 0, DIR_SE, ST_SMALL_UFO_SHADOW);
00787   u->vehstatus |= VS_SHADOW;
00788 }
00789 
00790 
00791 /* Combat airplane which destroys an oil refinery */
00792 static void Disaster_Airplane_Init()
00793 {
00794   if (!Vehicle::CanAllocateItem(2)) return;
00795 
00796   Industry *i, *found = NULL;
00797 
00798   FOR_ALL_INDUSTRIES(i) {
00799     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) &&
00800         (found == NULL || Chance16(1, 2))) {
00801       found = i;
00802     }
00803   }
00804 
00805   if (found == NULL) return;
00806 
00807   Vehicle *v = new DisasterVehicle();
00808 
00809   /* Start from the bottom (south side) of the map */
00810   int x = (MapSizeX() + 9) * TILE_SIZE - 1;
00811   int y = TileY(found->xy) * TILE_SIZE + 37;
00812 
00813   InitializeDisasterVehicle(v, x, y, 135, DIR_NE, ST_AIRPLANE);
00814 
00815   Vehicle *u = new DisasterVehicle();
00816   v->SetNext(u);
00817   InitializeDisasterVehicle(u, x, y, 0, DIR_SE, ST_AIRPLANE_SHADOW);
00818   u->vehstatus |= VS_SHADOW;
00819 }
00820 
00821 
00823 static void Disaster_Helicopter_Init()
00824 {
00825   if (!Vehicle::CanAllocateItem(3)) return;
00826 
00827   Industry *i, *found = NULL;
00828 
00829   FOR_ALL_INDUSTRIES(i) {
00830     if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CHOPPER_ATTACKS) &&
00831         (found == NULL || Chance16(1, 2))) {
00832       found = i;
00833     }
00834   }
00835 
00836   if (found == NULL) return;
00837 
00838   Vehicle *v = new DisasterVehicle();
00839 
00840   int x = -16 * TILE_SIZE;
00841   int y = TileY(found->xy) * TILE_SIZE + 37;
00842 
00843   InitializeDisasterVehicle(v, x, y, 135, DIR_SW, ST_HELICOPTER);
00844 
00845   Vehicle *u = new DisasterVehicle();
00846   v->SetNext(u);
00847   InitializeDisasterVehicle(u, x, y, 0, DIR_SW, ST_HELICOPTER_SHADOW);
00848   u->vehstatus |= VS_SHADOW;
00849 
00850   Vehicle *w = new DisasterVehicle();
00851   u->SetNext(w);
00852   InitializeDisasterVehicle(w, x, y, 140, DIR_SW, ST_HELICOPTER_ROTORS);
00853 }
00854 
00855 
00856 /* Big Ufo which lands on a piece of rail and will consequently be shot
00857  * down by a combat airplane, destroying the surroundings */
00858 static void Disaster_Big_Ufo_Init()
00859 {
00860   if (!Vehicle::CanAllocateItem(2)) return;
00861 
00862   Vehicle *v = new DisasterVehicle();
00863   int x = TileX(Random()) * TILE_SIZE + TILE_SIZE / 2;
00864   int y = MapMaxX() * TILE_SIZE - 1;
00865 
00866   InitializeDisasterVehicle(v, x, y, 135, DIR_NW, ST_BIG_UFO);
00867   v->dest_tile = TileXY(MapSizeX() / 2, MapSizeY() / 2);
00868   v->age = 0;
00869 
00870   /* Allocate shadow */
00871   Vehicle *u = new DisasterVehicle();
00872   v->SetNext(u);
00873   InitializeDisasterVehicle(u, x, y, 0, DIR_NW, ST_BIG_UFO_SHADOW);
00874   u->vehstatus |= VS_SHADOW;
00875 }
00876 
00877 
00878 static void Disaster_Submarine_Init(DisasterSubType subtype)
00879 {
00880   if (!Vehicle::CanAllocateItem()) return;
00881 
00882   int y;
00883   Direction dir;
00884   uint32 r = Random();
00885   int x = TileX(r) * TILE_SIZE + TILE_SIZE / 2;
00886 
00887   if (HasBit(r, 31)) {
00888     y = MapMaxX() * TILE_SIZE - TILE_SIZE / 2 - 1;
00889     dir = DIR_NW;
00890   } else {
00891     y = TILE_SIZE / 2;
00892     if (_settings_game.construction.freeform_edges) y += TILE_SIZE;
00893     dir = DIR_SE;
00894   }
00895   if (!IsWaterTile(TileVirtXY(x, y))) return;
00896 
00897   Vehicle *v = new DisasterVehicle();
00898   InitializeDisasterVehicle(v, x, y, 0, dir, subtype);
00899   v->age = 0;
00900 }
00901 
00902 /* Curious submarine #1, just floats around */
00903 static void Disaster_Small_Submarine_Init()
00904 {
00905   Disaster_Submarine_Init(ST_SMALL_SUBMARINE);
00906 }
00907 
00908 
00909 /* Curious submarine #2, just floats around */
00910 static void Disaster_Big_Submarine_Init()
00911 {
00912   Disaster_Submarine_Init(ST_BIG_SUBMARINE);
00913 }
00914 
00915 
00918 static void Disaster_CoalMine_Init()
00919 {
00920   int index = GB(Random(), 0, 4);
00921   uint m;
00922 
00923   for (m = 0; m < 15; m++) {
00924     const Industry *i;
00925 
00926     FOR_ALL_INDUSTRIES(i) {
00927       if ((GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_CAN_SUBSIDENCE) && --index < 0) {
00928         SetDParam(0, i->town->index);
00929         AddNewsItem(STR_B005_COAL_MINE_SUBSIDENCE_LEAVES,
00930           NS_ACCIDENT_TILE, i->xy + TileDiffXY(1, 1), 0);
00931 
00932         {
00933           TileIndex tile = i->xy;
00934           TileIndexDiff step = TileOffsByDiagDir((DiagDirection)GB(Random(), 0, 2));
00935 
00936           for (uint n = 0; n < 30; n++) {
00937             DisasterClearSquare(tile);
00938             tile += step;
00939             if (!IsValidTile(tile)) break;
00940           }
00941         }
00942         return;
00943       }
00944     }
00945   }
00946 }
00947 
00948 static DisasterInitProc * const _disaster_initprocs[] = {
00949   Disaster_Zeppeliner_Init,
00950   Disaster_Small_Ufo_Init,
00951   Disaster_Airplane_Init,
00952   Disaster_Helicopter_Init,
00953   Disaster_Big_Ufo_Init,
00954   Disaster_Small_Submarine_Init,
00955   Disaster_Big_Submarine_Init,
00956   Disaster_CoalMine_Init,
00957 };
00958 
00959 static const struct {
00960   Year min;
00961   Year max;
00962 } _dis_years[] = {
00963   { 1930, 1955 }, 
00964   { 1940, 1970 }, 
00965   { 1960, 1990 }, 
00966   { 1970, 2000 }, 
00967   { 2000, 2100 }, 
00968   { 1940, 1965 }, 
00969   { 1975, 2010 }, 
00970   { 1950, 1985 }  
00971 };
00972 
00973 
00974 static void DoDisaster()
00975 {
00976   byte buf[lengthof(_dis_years)];
00977   uint i;
00978   uint j;
00979 
00980   j = 0;
00981   for (i = 0; i != lengthof(_dis_years); i++) {
00982     if (_cur_year >= _dis_years[i].min && _cur_year < _dis_years[i].max) buf[j++] = i;
00983   }
00984 
00985   if (j == 0) return;
00986 
00987   _disaster_initprocs[buf[RandomRange(j)]]();
00988 }
00989 
00990 
00991 static void ResetDisasterDelay()
00992 {
00993   _disaster_delay = GB(Random(), 0, 9) + 730;
00994 }
00995 
00996 void DisasterDailyLoop()
00997 {
00998   if (--_disaster_delay != 0) return;
00999 
01000   ResetDisasterDelay();
01001 
01002   if (_settings_game.difficulty.disasters != 0) DoDisaster();
01003 }
01004 
01005 void StartupDisasters()
01006 {
01007   ResetDisasterDelay();
01008 }
01009 
01014 void ReleaseDisastersTargetingIndustry(IndustryID i)
01015 {
01016   Vehicle *v;
01017   FOR_ALL_VEHICLES(v) {
01018     /* primary disaster vehicles that have chosen target */
01019     if (v->type == VEH_DISASTER && (v->subtype == ST_AIRPLANE || v->subtype == ST_HELICOPTER)) {
01020       /* if it has chosen target, and it is this industry (yes, dest_tile is IndustryID here), set order to "leaving map peacefully" */
01021       if (v->current_order.GetDestination() > 0 && v->dest_tile == i) v->current_order.SetDestination(3);
01022     }
01023   }
01024 }
01025 
01026 void DisasterVehicle::UpdateDeltaXY(Direction direction)
01027 {
01028   this->x_offs        = -1;
01029   this->y_offs        = -1;
01030   this->x_extent      =  2;
01031   this->y_extent      =  2;
01032   this->z_extent      =  5;
01033 }

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