ship_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 
00012 #include "stdafx.h"
00013 #include "ship.h"
00014 #include "landscape.h"
00015 #include "timetable.h"
00016 #include "command_func.h"
00017 #include "news_func.h"
00018 #include "company_func.h"
00019 #include "pathfinder/npf/npf_func.h"
00020 #include "depot_base.h"
00021 #include "station_base.h"
00022 #include "vehicle_gui.h"
00023 #include "newgrf_engine.h"
00024 #include "pathfinder/yapf/yapf.h"
00025 #include "newgrf_sound.h"
00026 #include "spritecache.h"
00027 #include "strings_func.h"
00028 #include "functions.h"
00029 #include "window_func.h"
00030 #include "date_func.h"
00031 #include "vehicle_func.h"
00032 #include "sound_func.h"
00033 #include "autoreplace_gui.h"
00034 #include "gfx_func.h"
00035 #include "effectvehicle_func.h"
00036 #include "ai/ai.hpp"
00037 #include "pathfinder/opf/opf_ship.h"
00038 #include "landscape_type.h"
00039 #include "infrastructure_func.h"
00040 
00041 #include "table/strings.h"
00042 #include "table/sprites.h"
00043 
00044 static const uint16 _ship_sprites[] = {0x0E5D, 0x0E55, 0x0E65, 0x0E6D};
00045 
00046 static inline TrackBits GetTileShipTrackStatus(TileIndex tile)
00047 {
00048   return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
00049 }
00050 
00051 static SpriteID GetShipIcon(EngineID engine)
00052 {
00053   const Engine *e = Engine::Get(engine);
00054   uint8 spritenum = e->u.ship.image_index;
00055 
00056   if (is_custom_sprite(spritenum)) {
00057     SpriteID sprite = GetCustomVehicleIcon(engine, DIR_W);
00058     if (sprite != 0) return sprite;
00059 
00060     spritenum = e->original_image_index;
00061   }
00062 
00063   return DIR_W + _ship_sprites[spritenum];
00064 }
00065 
00066 void DrawShipEngine(int left, int right, int preferred_x, int y, EngineID engine, SpriteID pal)
00067 {
00068   SpriteID sprite = GetShipIcon(engine);
00069   const Sprite *real_sprite = GetSprite(sprite, ST_NORMAL);
00070   preferred_x = Clamp(preferred_x, left - real_sprite->x_offs, right - real_sprite->width - real_sprite->x_offs);
00071   DrawSprite(sprite, pal, preferred_x, y);
00072 }
00073 
00079 void GetShipSpriteSize(EngineID engine, uint &width, uint &height)
00080 {
00081   const Sprite *spr = GetSprite(GetShipIcon(engine), ST_NORMAL);
00082 
00083   width  = spr->width;
00084   height = spr->height;
00085 }
00086 
00087 SpriteID Ship::GetImage(Direction direction) const
00088 {
00089   uint8 spritenum = this->spritenum;
00090 
00091   if (is_custom_sprite(spritenum)) {
00092     SpriteID sprite = GetCustomVehicleSprite(this, direction);
00093     if (sprite != 0) return sprite;
00094 
00095     spritenum = Engine::Get(this->engine_type)->original_image_index;
00096   }
00097 
00098   return _ship_sprites[spritenum] + direction;
00099 }
00100 
00101 static const Depot *FindClosestShipDepot(const Vehicle *v, uint max_distance)
00102 {
00103   /* Find the closest depot */
00104   const Depot *depot;
00105   const Depot *best_depot = NULL;
00106   /* If we don't have a maximum distance, i.e. distance = 0,
00107    * we want to find any depot so the best distance of no
00108    * depot must be more than any correct distance. On the
00109    * other hand if we have set a maximum distance, any depot
00110    * further away than max_distance can safely be ignored. */
00111   uint best_dist = max_distance == 0 ? UINT_MAX : max_distance + 1;
00112 
00113   FOR_ALL_DEPOTS(depot) {
00114     TileIndex tile = depot->xy;
00115     if (IsShipDepotTile(tile) && IsInfraTileUsageAllowed(tile, v->owner, VEH_SHIP)) {
00116       uint dist = DistanceManhattan(tile, v->tile);
00117       if (dist < best_dist) {
00118         best_dist = dist;
00119         best_depot = depot;
00120       }
00121     }
00122   }
00123 
00124   return best_depot;
00125 }
00126 
00127 static void CheckIfShipNeedsService(Vehicle *v)
00128 {
00129   if (Company::Get(v->owner)->settings.vehicle.servint_ships == 0 || !v->NeedsAutomaticServicing()) return;
00130   if (v->IsInDepot()) {
00131     VehicleServiceInDepot(v);
00132     return;
00133   }
00134 
00135   uint max_distance;
00136   switch (_settings_game.pf.pathfinder_for_ships) {
00137     case VPF_OPF:  max_distance = 12; break;
00138     case VPF_NPF:  max_distance = _settings_game.pf.npf.maximum_go_to_depot_penalty  / NPF_TILE_LENGTH;  break;
00139     case VPF_YAPF: max_distance = _settings_game.pf.yapf.maximum_go_to_depot_penalty / YAPF_TILE_LENGTH; break;
00140     default: NOT_REACHED();
00141   }
00142 
00143   const Depot *depot = FindClosestShipDepot(v, max_distance);
00144 
00145   if (depot == NULL) {
00146     if (v->current_order.IsType(OT_GOTO_DEPOT)) {
00147       v->current_order.MakeDummy();
00148       SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00149     }
00150     return;
00151   }
00152 
00153   v->current_order.MakeGoToDepot(depot->index, ODTFB_SERVICE);
00154   v->dest_tile = depot->xy;
00155   SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00156 }
00157 
00158 Money Ship::GetRunningCost() const
00159 {
00160   const Engine *e = Engine::Get(this->engine_type);
00161   uint cost_factor = GetVehicleProperty(this, PROP_SHIP_RUNNING_COST_FACTOR, e->u.ship.running_cost);
00162   return GetPrice(PR_RUNNING_SHIP, cost_factor, e->grffile);
00163 }
00164 
00165 void Ship::OnNewDay()
00166 {
00167   if ((++this->day_counter & 7) == 0)
00168     DecreaseVehicleValue(this);
00169 
00170   CheckVehicleBreakdown(this);
00171   AgeVehicle(this);
00172   CheckIfShipNeedsService(this);
00173 
00174   CheckOrders(this);
00175 
00176   if (this->running_ticks == 0) return;
00177 
00178   CommandCost cost(EXPENSES_SHIP_RUN, this->GetRunningCost() * this->running_ticks / (DAYS_IN_YEAR * DAY_TICKS));
00179 
00180   this->profit_this_year -= cost.GetCost();
00181   this->running_ticks = 0;
00182 
00183   SubtractMoneyFromCompanyFract(this->owner, cost);
00184 
00185   SetWindowDirty(WC_VEHICLE_DETAILS, this->index);
00186   /* we need this for the profit */
00187   SetWindowClassesDirty(WC_SHIPS_LIST);
00188 }
00189 
00190 Trackdir Ship::GetVehicleTrackdir() const
00191 {
00192   if (this->vehstatus & VS_CRASHED) return INVALID_TRACKDIR;
00193 
00194   if (this->IsInDepot()) {
00195     /* We'll assume the ship is facing outwards */
00196     return DiagDirToDiagTrackdir(GetShipDepotDirection(this->tile));
00197   }
00198 
00199   if (this->state == TRACK_BIT_WORMHOLE) {
00200     /* ship on aqueduct, so just use his direction and assume a diagonal track */
00201     return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
00202   }
00203 
00204   return TrackDirectionToTrackdir(FindFirstTrack(this->state), this->direction);
00205 }
00206 
00207 static void HandleBrokenShip(Vehicle *v)
00208 {
00209   if (v->breakdown_ctr != 1) {
00210     v->breakdown_ctr = 1;
00211     v->cur_speed = 0;
00212 
00213     if (v->breakdowns_since_last_service != 255)
00214       v->breakdowns_since_last_service++;
00215 
00216     v->MarkDirty();
00217     SetWindowDirty(WC_VEHICLE_VIEW, v->index);
00218     SetWindowDirty(WC_VEHICLE_DETAILS, v->index);
00219 
00220     if (!PlayVehicleSound(v, VSE_BREAKDOWN)) {
00221       SndPlayVehicleFx((_settings_game.game_creation.landscape != LT_TOYLAND) ?
00222         SND_10_TRAIN_BREAKDOWN : SND_3A_COMEDY_BREAKDOWN_2, v);
00223     }
00224 
00225     if (!(v->vehstatus & VS_HIDDEN)) {
00226       EffectVehicle *u = CreateEffectVehicleRel(v, 4, 4, 5, EV_BREAKDOWN_SMOKE);
00227       if (u != NULL) u->animation_state = v->breakdown_delay * 2;
00228     }
00229   }
00230 
00231   if (!(v->tick_counter & 1)) {
00232     if (!--v->breakdown_delay) {
00233       v->breakdown_ctr = 0;
00234       v->MarkDirty();
00235       SetWindowDirty(WC_VEHICLE_VIEW, v->index);
00236     }
00237   }
00238 }
00239 
00240 void Ship::MarkDirty()
00241 {
00242   this->UpdateViewport(false, false);
00243 }
00244 
00245 static void PlayShipSound(const Vehicle *v)
00246 {
00247   if (!PlayVehicleSound(v, VSE_START)) {
00248     SndPlayVehicleFx(ShipVehInfo(v->engine_type)->sfx, v);
00249   }
00250 }
00251 
00252 void Ship::PlayLeaveStationSound() const
00253 {
00254   PlayShipSound(this);
00255 }
00256 
00257 TileIndex Ship::GetOrderStationLocation(StationID station)
00258 {
00259   if (station == this->last_station_visited) this->last_station_visited = INVALID_STATION;
00260 
00261   const Station *st = Station::Get(station);
00262   if (st->dock_tile != INVALID_TILE) {
00263     return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
00264   } else {
00265     this->IncrementOrderIndex();
00266     return 0;
00267   }
00268 }
00269 
00270 void Ship::UpdateDeltaXY(Direction direction)
00271 {
00272 #define MKIT(a, b, c, d) ((a & 0xFF) << 24) | ((b & 0xFF) << 16) | ((c & 0xFF) << 8) | ((d & 0xFF) << 0)
00273   static const uint32 _delta_xy_table[8] = {
00274     MKIT( 6,  6,  -3,  -3),
00275     MKIT( 6, 32,  -3, -16),
00276     MKIT( 6,  6,  -3,  -3),
00277     MKIT(32,  6, -16,  -3),
00278     MKIT( 6,  6,  -3,  -3),
00279     MKIT( 6, 32,  -3, -16),
00280     MKIT( 6,  6,  -3,  -3),
00281     MKIT(32,  6, -16,  -3),
00282   };
00283 #undef MKIT
00284 
00285   uint32 x = _delta_xy_table[direction];
00286   this->x_offs        = GB(x,  0, 8);
00287   this->y_offs        = GB(x,  8, 8);
00288   this->x_extent      = GB(x, 16, 8);
00289   this->y_extent      = GB(x, 24, 8);
00290   this->z_extent      = 6;
00291 }
00292 
00293 void RecalcShipStuff(Vehicle *v)
00294 {
00295   v->UpdateViewport(false, true);
00296   SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
00297 }
00298 
00299 static const TileIndexDiffC _ship_leave_depot_offs[] = {
00300   {-1,  0},
00301   { 0, -1}
00302 };
00303 
00304 static void CheckShipLeaveDepot(Ship *v)
00305 {
00306   if (!v->IsInDepot()) return;
00307 
00308   TileIndex tile = v->tile;
00309   Axis axis = GetShipDepotAxis(tile);
00310 
00311   /* Check first (north) side */
00312   if (DiagdirReachesTracks((DiagDirection)axis) & GetTileShipTrackStatus(TILE_ADD(tile, ToTileIndexDiff(_ship_leave_depot_offs[axis])))) {
00313     v->direction = ReverseDir(AxisToDirection(axis));
00314   /* Check second (south) side */
00315   } else if (DiagdirReachesTracks((DiagDirection)(axis + 2)) & GetTileShipTrackStatus(TILE_ADD(tile, -2 * ToTileIndexDiff(_ship_leave_depot_offs[axis])))) {
00316     v->direction = AxisToDirection(axis);
00317   } else {
00318     return;
00319   }
00320 
00321   v->state = AxisToTrackBits(axis);
00322   v->vehstatus &= ~VS_HIDDEN;
00323 
00324   v->cur_speed = 0;
00325   RecalcShipStuff(v);
00326 
00327   PlayShipSound(v);
00328   VehicleServiceInDepot(v);
00329   InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
00330   SetWindowClassesDirty(WC_SHIPS_LIST);
00331 }
00332 
00333 static bool ShipAccelerate(Vehicle *v)
00334 {
00335   uint spd;
00336   byte t;
00337 
00338   spd = min(v->cur_speed + 1, GetVehicleProperty(v, PROP_SHIP_SPEED, v->max_speed));
00339 
00340   /* updates statusbar only if speed have changed to save CPU time */
00341   if (spd != v->cur_speed) {
00342     v->cur_speed = spd;
00343     if (_settings_client.gui.vehicle_speed)
00344       SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00345   }
00346 
00347   /* Decrease somewhat when turning */
00348   if (!(v->direction & 1)) spd = spd * 3 / 4;
00349 
00350   if (spd == 0) return false;
00351   if ((byte)++spd == 0) return true;
00352 
00353   v->progress = (t = v->progress) - (byte)spd;
00354 
00355   return (t < v->progress);
00356 }
00357 
00358 static void ShipArrivesAt(const Vehicle *v, Station *st)
00359 {
00360   /* Check if station was ever visited before */
00361   if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
00362     st->had_vehicle_of_type |= HVOT_SHIP;
00363 
00364     SetDParam(0, st->index);
00365     AddVehicleNewsItem(
00366       STR_NEWS_FIRST_SHIP_ARRIVAL,
00367       (v->owner == _local_company) ? NS_ARRIVAL_COMPANY : NS_ARRIVAL_OTHER,
00368       v->index,
00369       st->index
00370     );
00371     AI::NewEvent(v->owner, new AIEventStationFirstVehicle(st->index, v->index));
00372   }
00373 }
00374 
00375 
00379 static Track ChooseShipTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
00380 {
00381   assert(IsValidDiagDirection(enterdir));
00382 
00383   switch (_settings_game.pf.pathfinder_for_ships) {
00384     case VPF_OPF: return OPFShipChooseTrack(v, tile, enterdir, tracks);
00385     case VPF_NPF: return NPFShipChooseTrack(v, tile, enterdir, tracks);
00386     case VPF_YAPF: return YapfShipChooseTrack(v, tile, enterdir, tracks);
00387     default: NOT_REACHED();
00388   }
00389 }
00390 
00391 static const Direction _new_vehicle_direction_table[] = {
00392   DIR_N , DIR_NW, DIR_W , INVALID_DIR,
00393   DIR_NE, DIR_N , DIR_SW, INVALID_DIR,
00394   DIR_E , DIR_SE, DIR_S
00395 };
00396 
00397 static Direction ShipGetNewDirectionFromTiles(TileIndex new_tile, TileIndex old_tile)
00398 {
00399   uint offs = (TileY(new_tile) - TileY(old_tile) + 1) * 4 +
00400               TileX(new_tile) - TileX(old_tile) + 1;
00401   assert(offs < 11 && offs != 3 && offs != 7);
00402   return _new_vehicle_direction_table[offs];
00403 }
00404 
00405 static Direction ShipGetNewDirection(Vehicle *v, int x, int y)
00406 {
00407   uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
00408   assert(offs < 11 && offs != 3 && offs != 7);
00409   return _new_vehicle_direction_table[offs];
00410 }
00411 
00412 static inline TrackBits GetAvailShipTracks(TileIndex tile, DiagDirection dir)
00413 {
00414   return GetTileShipTrackStatus(tile) & DiagdirReachesTracks(dir);
00415 }
00416 
00417 static const byte _ship_subcoord[4][6][3] = {
00418   {
00419     {15, 8, 1},
00420     { 0, 0, 0},
00421     { 0, 0, 0},
00422     {15, 8, 2},
00423     {15, 7, 0},
00424     { 0, 0, 0},
00425   },
00426   {
00427     { 0, 0, 0},
00428     { 8, 0, 3},
00429     { 7, 0, 2},
00430     { 0, 0, 0},
00431     { 8, 0, 4},
00432     { 0, 0, 0},
00433   },
00434   {
00435     { 0, 8, 5},
00436     { 0, 0, 0},
00437     { 0, 7, 6},
00438     { 0, 0, 0},
00439     { 0, 0, 0},
00440     { 0, 8, 4},
00441   },
00442   {
00443     { 0, 0, 0},
00444     { 8, 15, 7},
00445     { 0, 0, 0},
00446     { 8, 15, 6},
00447     { 0, 0, 0},
00448     { 7, 15, 0},
00449   }
00450 };
00451 
00452 static void ShipController(Ship *v)
00453 {
00454   uint32 r;
00455   const byte *b;
00456   Direction dir;
00457   Track track;
00458   TrackBits tracks;
00459 
00460   v->tick_counter++;
00461   v->current_order_time++;
00462 
00463   if (v->breakdown_ctr != 0) {
00464     if (v->breakdown_ctr <= 2) {
00465       HandleBrokenShip(v);
00466       return;
00467     }
00468     if (!v->current_order.IsType(OT_LOADING)) v->breakdown_ctr--;
00469   }
00470 
00471   if (v->vehstatus & VS_STOPPED) return;
00472 
00473   ProcessOrders(v);
00474   v->HandleLoading();
00475 
00476   if (v->current_order.IsType(OT_LOADING)) return;
00477 
00478   CheckShipLeaveDepot(v);
00479 
00480   if (!ShipAccelerate(v)) return;
00481 
00482   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00483   if (v->state != TRACK_BIT_WORMHOLE) {
00484     /* Not on a bridge */
00485     if (gp.old_tile == gp.new_tile) {
00486       /* Staying in tile */
00487       if (v->IsInDepot()) {
00488         gp.x = v->x_pos;
00489         gp.y = v->y_pos;
00490       } else {
00491         /* Not inside depot */
00492         r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
00493         if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
00494 
00495         /* A leave station order only needs one tick to get processed, so we can
00496          * always skip ahead. */
00497         if (v->current_order.IsType(OT_LEAVESTATION)) {
00498           v->current_order.Free();
00499           SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00500         } else if (v->dest_tile != 0) {
00501           /* We have a target, let's see if we reached it... */
00502           if (v->current_order.IsType(OT_GOTO_WAYPOINT) &&
00503               DistanceManhattan(v->dest_tile, gp.new_tile) <= 3) {
00504             /* We got within 3 tiles of our target buoy, so let's skip to our
00505              * next order */
00506             UpdateVehicleTimetable(v, true);
00507             v->IncrementOrderIndex();
00508             v->current_order.MakeDummy();
00509           } else {
00510             /* Non-buoy orders really need to reach the tile */
00511             if (v->dest_tile == gp.new_tile) {
00512               if (v->current_order.IsType(OT_GOTO_DEPOT)) {
00513                 if ((gp.x & 0xF) == 8 && (gp.y & 0xF) == 8) {
00514                   VehicleEnterDepot(v);
00515                   return;
00516                 }
00517               } else if (v->current_order.IsType(OT_GOTO_STATION)) {
00518                 v->last_station_visited = v->current_order.GetDestination();
00519 
00520                 /* Process station in the orderlist. */
00521                 Station *st = Station::Get(v->current_order.GetDestination());
00522                 if (st->facilities & FACIL_DOCK) { // ugly, ugly workaround for problem with ships able to drop off cargo at wrong stations
00523                   ShipArrivesAt(v, st);
00524                   v->BeginLoading();
00525                 } else { // leave stations without docks right aways
00526                   v->current_order.MakeLeaveStation();
00527                   v->IncrementOrderIndex();
00528                 }
00529               }
00530             }
00531           }
00532         }
00533       }
00534     } else {
00535       DiagDirection diagdir;
00536       /* New tile */
00537       if (TileX(gp.new_tile) >= MapMaxX() || TileY(gp.new_tile) >= MapMaxY()) {
00538         goto reverse_direction;
00539       }
00540 
00541       dir = ShipGetNewDirectionFromTiles(gp.new_tile, gp.old_tile);
00542       assert(dir == DIR_NE || dir == DIR_SE || dir == DIR_SW || dir == DIR_NW);
00543       diagdir = DirToDiagDir(dir);
00544       tracks = GetAvailShipTracks(gp.new_tile, diagdir);
00545       if (tracks == TRACK_BIT_NONE) goto reverse_direction;
00546 
00547       /* Choose a direction, and continue if we find one */
00548       track = ChooseShipTrack(v, gp.new_tile, diagdir, tracks);
00549       if (track == INVALID_TRACK) goto reverse_direction;
00550 
00551       b = _ship_subcoord[diagdir][track];
00552 
00553       gp.x = (gp.x & ~0xF) | b[0];
00554       gp.y = (gp.y & ~0xF) | b[1];
00555 
00556       /* Call the landscape function and tell it that the vehicle entered the tile */
00557       r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
00558       if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
00559 
00560       if (!HasBit(r, VETS_ENTERED_WORMHOLE)) {
00561         v->tile = gp.new_tile;
00562         v->state = TrackToTrackBits(track);
00563       }
00564 
00565       v->direction = (Direction)b[2];
00566     }
00567   } else {
00568     /* On a bridge */
00569     if (!IsTileType(gp.new_tile, MP_TUNNELBRIDGE) || !HasBit(VehicleEnterTile(v, gp.new_tile, gp.x, gp.y), VETS_ENTERED_WORMHOLE)) {
00570       v->x_pos = gp.x;
00571       v->y_pos = gp.y;
00572       VehicleMove(v, !(v->vehstatus & VS_HIDDEN));
00573       return;
00574     }
00575   }
00576 
00577   /* update image of ship, as well as delta XY */
00578   dir = ShipGetNewDirection(v, gp.x, gp.y);
00579   v->x_pos = gp.x;
00580   v->y_pos = gp.y;
00581   v->z_pos = GetSlopeZ(gp.x, gp.y);
00582 
00583 getout:
00584   v->UpdateViewport(true, true);
00585   return;
00586 
00587 reverse_direction:
00588   dir = ReverseDir(v->direction);
00589   v->direction = dir;
00590   goto getout;
00591 }
00592 
00593 bool Ship::Tick()
00594 {
00595   if (!(this->vehstatus & VS_STOPPED)) this->running_ticks++;
00596 
00597   ShipController(this);
00598 
00599   return true;
00600 }
00601 
00610 CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00611 {
00612   UnitID unit_num;
00613 
00614   if (!IsEngineBuildable(p1, VEH_SHIP, _current_company)) return_cmd_error(STR_ERROR_SHIP_NOT_AVAILABLE);
00615 
00616   const Engine *e = Engine::Get(p1);
00617   CommandCost value(EXPENSES_NEW_VEHICLES, e->GetCost());
00618 
00619   /* Engines without valid cargo should not be available */
00620   if (e->GetDefaultCargoType() == CT_INVALID) return CMD_ERROR;
00621 
00622   if (flags & DC_QUERY_COST) return value;
00623 
00624   /* The ai_new queries the vehicle cost before building the route,
00625    * so we must check against cheaters no sooner than now. --pasky */
00626   if (!IsShipDepotTile(tile)) return CMD_ERROR;
00627   if (!CheckInfraUsageAllowed(GetTileOwner(tile), VEH_SHIP)) return CMD_ERROR;
00628 
00629   unit_num = (flags & DC_AUTOREPLACE) ? 0 : GetFreeUnitNumber(VEH_SHIP);
00630 
00631   if (!Vehicle::CanAllocateItem() || unit_num > _settings_game.vehicle.max_ships)
00632     return_cmd_error(STR_ERROR_TOO_MANY_VEHICLES_IN_GAME);
00633 
00634   if (flags & DC_EXEC) {
00635     int x;
00636     int y;
00637 
00638     const ShipVehicleInfo *svi = &e->u.ship;
00639 
00640     Ship *v = new Ship();
00641     v->unitnumber = unit_num;
00642 
00643     v->owner = _current_company;
00644     v->tile = tile;
00645     x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
00646     y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
00647     v->x_pos = x;
00648     v->y_pos = y;
00649     v->z_pos = GetSlopeZ(x, y);
00650 
00651     v->running_ticks = 0;
00652 
00653     v->UpdateDeltaXY(v->direction);
00654     v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
00655 
00656     v->spritenum = svi->image_index;
00657     v->cargo_type = e->GetDefaultCargoType();
00658     v->cargo_subtype = 0;
00659     v->cargo_cap = svi->capacity;
00660     v->value = value.GetCost();
00661 
00662     v->last_station_visited = INVALID_STATION;
00663     v->max_speed = svi->max_speed;
00664     v->engine_type = p1;
00665 
00666     v->reliability = e->reliability;
00667     v->reliability_spd_dec = e->reliability_spd_dec;
00668     v->max_age = e->GetLifeLengthInDays();
00669     _new_vehicle_id = v->index;
00670 
00671     v->name = NULL;
00672     v->state = TRACK_BIT_DEPOT;
00673 
00674     v->service_interval = Company::Get(_current_company)->settings.vehicle.servint_ships;
00675     v->date_of_last_service = _date;
00676     v->build_year = _cur_year;
00677     v->cur_image = SPR_IMG_QUERY;
00678     v->random_bits = VehicleRandomBits();
00679 
00680     v->vehicle_flags = 0;
00681     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);
00682 
00683     v->InvalidateNewGRFCacheOfChain();
00684 
00685     v->cargo_cap = GetVehicleCapacity(v);
00686 
00687     v->InvalidateNewGRFCacheOfChain();
00688 
00689     VehicleMove(v, false);
00690 
00691     InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
00692     InvalidateWindowClassesData(WC_SHIPS_LIST, 0);
00693     SetWindowDirty(WC_COMPANY, v->owner);
00694     if (IsLocalCompany())
00695       InvalidateAutoreplaceWindow(v->engine_type, v->group_id); // updates the replace Ship window
00696 
00697     Company::Get(_current_company)->num_engines[p1]++;
00698   }
00699 
00700   return value;
00701 }
00702 
00711 CommandCost CmdSellShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00712 {
00713   Ship *v = Ship::GetIfValid(p1);
00714   if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;
00715 
00716   if (v->vehstatus & VS_CRASHED) return_cmd_error(STR_ERROR_CAN_T_SELL_DESTROYED_VEHICLE);
00717 
00718   if (!v->IsStoppedInDepot()) {
00719     return_cmd_error(STR_ERROR_SHIP_MUST_BE_STOPPED_IN_DEPOT);
00720   }
00721 
00722   CommandCost ret(EXPENSES_NEW_VEHICLES, -v->value);
00723 
00724   if (flags & DC_EXEC) {
00725     delete v;
00726   }
00727 
00728   return ret;
00729 }
00730 
00731 bool Ship::FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse)
00732 {
00733   const Depot *depot = FindClosestShipDepot(this, 0);
00734 
00735   if (depot == NULL) return false;
00736 
00737   if (location    != NULL) *location    = depot->xy;
00738   if (destination != NULL) *destination = depot->index;
00739 
00740   return true;
00741 }
00742 
00753 CommandCost CmdSendShipToDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00754 {
00755   if (p2 & DEPOT_MASS_SEND) {
00756     /* Mass goto depot requested */
00757     if (!ValidVLWFlags(p2 & VLW_MASK)) return CMD_ERROR;
00758     return SendAllVehiclesToDepot(VEH_SHIP, flags, p2 & DEPOT_SERVICE, _current_company, (p2 & VLW_MASK), p1);
00759   }
00760 
00761   Ship *v = Ship::GetIfValid(p1);
00762   if (v == NULL) return CMD_ERROR;
00763 
00764   return v->SendToDepot(flags, (DepotCommand)(p2 & DEPOT_COMMAND_MASK));
00765 }
00766 
00767 
00779 CommandCost CmdRefitShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00780 {
00781   CargoID new_cid = GB(p2, 0, 8); // gets the cargo number
00782   byte new_subtype = GB(p2, 8, 8);
00783 
00784   Ship *v = Ship::GetIfValid(p1);
00785 
00786   if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;
00787   if (!v->IsStoppedInDepot()) return_cmd_error(STR_ERROR_SHIP_MUST_BE_STOPPED_IN_DEPOT);
00788   if (v->vehstatus & VS_CRASHED) return_cmd_error(STR_ERROR_CAN_T_REFIT_DESTROYED_VEHICLE);
00789 
00790   /* Check cargo */
00791   if (new_cid >= NUM_CARGO) return CMD_ERROR;
00792 
00793   CommandCost cost = RefitVehicle(v, true, new_cid, new_subtype, flags);
00794 
00795   if (flags & DC_EXEC) {
00796     v->colourmap = PAL_NONE; // invalidate vehicle colour map
00797     SetWindowDirty(WC_VEHICLE_DETAILS, v->index);
00798     SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
00799     InvalidateWindowClassesData(WC_SHIPS_LIST, 0);
00800   }
00801   v->InvalidateNewGRFCacheOfChain(); // always invalidate; querycost might have filled it
00802 
00803   return cost;
00804 
00805 }

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