# ship_cmd.cpp

Go to the documentation of this file.

    00001 /* $Id: ship_cmd.cpp 24998 2013-02-14 17:24:55Z rubidium $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "ship.h"
    00014 #include "landscape.h"
    00015 #include "timetable.h"
    00016 #include "news_func.h"
    00017 #include "company_func.h"
    00018 #include "pathfinder/npf/npf_func.h"
    00019 #include "depot_base.h"
    00020 #include "station_base.h"
    00021 #include "newgrf_engine.h"
    00022 #include "pathfinder/yapf/yapf.h"
    00023 #include "newgrf_sound.h"
    00024 #include "spritecache.h"
    00025 #include "strings_func.h"
    00026 #include "window_func.h"
    00027 #include "date_func.h"
    00028 #include "vehicle_func.h"
    00029 #include "sound_func.h"
    00030 #include "ai/ai.hpp"
    00031 #include "pathfinder/opf/opf_ship.h"
    00032 #include "engine_base.h"
    00033 #include "company_base.h"
    00034 #include "tunnelbridge_map.h"
    00035 #include "zoom_func.h"
    00036
    00037 #include "table/strings.h"
    00038
    00044 WaterClass GetEffectiveWaterClass(TileIndex tile)
    00045 {
    00046   if (HasTileWaterClass(tile)) return GetWaterClass(tile);
    00047   if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00048     assert(GetTunnelBridgeTransportType(tile) == TRANSPORT_WATER);
    00049     return WATER_CLASS_CANAL;
    00050   }
    00051   if (IsTileType(tile, MP_RAILWAY)) {
    00052     assert(GetRailGroundType(tile) == RAIL_GROUND_WATER);
    00053     return WATER_CLASS_SEA;
    00054   }
    00055   NOT_REACHED();
    00056 }
    00057
    00058 static const uint16 _ship_sprites[] = {0x0E5D, 0x0E55, 0x0E65, 0x0E6D};
    00059
    00060 static inline TrackBits GetTileShipTrackStatus(TileIndex tile)
    00061 {
    00062   return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
    00063 }
    00064
    00065 static SpriteID GetShipIcon(EngineID engine, EngineImageType image_type)
    00066 {
    00067   const Engine *e = Engine::Get(engine);
    00068   uint8 spritenum = e->u.ship.image_index;
    00069
    00070   if (is_custom_sprite(spritenum)) {
    00071     SpriteID sprite = GetCustomVehicleIcon(engine, DIR_W, image_type);
    00072     if (sprite != 0) return sprite;
    00073
    00074     spritenum = e->original_image_index;
    00075   }
    00076
    00077   return DIR_W + _ship_sprites[spritenum];
    00078 }
    00079
    00080 void DrawShipEngine(int left, int right, int preferred_x, int y, EngineID engine, PaletteID pal, EngineImageType image_type)
    00081 {
    00082   SpriteID sprite = GetShipIcon(engine, image_type);
    00083   const Sprite *real_sprite = GetSprite(sprite, ST_NORMAL);
    00084   preferred_x = Clamp(preferred_x, left - UnScaleByZoom(real_sprite->x_offs, ZOOM_LVL_GUI), right - UnScaleByZoom(real_sprite->width, ZOOM_LVL_GUI) - UnScaleByZoom(real_sprite->x_offs, ZOOM_LVL_GUI));
    00085   DrawSprite(sprite, pal, preferred_x, y);
    00086 }
    00087
    00097 void GetShipSpriteSize(EngineID engine, uint &width, uint &height, int &xoffs, int &yoffs, EngineImageType image_type)
    00098 {
    00099   const Sprite *spr = GetSprite(GetShipIcon(engine, image_type), ST_NORMAL);
    00100
    00101   width  = UnScaleByZoom(spr->width, ZOOM_LVL_GUI);
    00102   height = UnScaleByZoom(spr->height, ZOOM_LVL_GUI);
    00103   xoffs  = UnScaleByZoom(spr->x_offs, ZOOM_LVL_GUI);
    00104   yoffs  = UnScaleByZoom(spr->y_offs, ZOOM_LVL_GUI);
    00105 }
    00106
    00107 SpriteID Ship::GetImage(Direction direction, EngineImageType image_type) const
    00108 {
    00109   uint8 spritenum = this->spritenum;
    00110
    00111   if (is_custom_sprite(spritenum)) {
    00112     SpriteID sprite = GetCustomVehicleSprite(this, direction, image_type);
    00113     if (sprite != 0) return sprite;
    00114
    00115     spritenum = this->GetEngine()->original_image_index;
    00116   }
    00117
    00118   return _ship_sprites[spritenum] + direction;
    00119 }
    00120
    00121 static const Depot *FindClosestShipDepot(const Vehicle *v, uint max_distance)
    00122 {
    00123   /* Find the closest depot */
    00124   const Depot *depot;
    00125   const Depot *best_depot = NULL;
    00126   /* If we don't have a maximum distance, i.e. distance = 0,
    00127    * we want to find any depot so the best distance of no
    00128    * depot must be more than any correct distance. On the
    00129    * other hand if we have set a maximum distance, any depot
    00130    * further away than max_distance can safely be ignored. */
    00131   uint best_dist = max_distance == 0 ? UINT_MAX : max_distance + 1;
    00132
    00133   FOR_ALL_DEPOTS(depot) {
    00134     TileIndex tile = depot->xy;
    00135     if (IsShipDepotTile(tile) && IsTileOwner(tile, v->owner)) {
    00136       uint dist = DistanceManhattan(tile, v->tile);
    00137       if (dist < best_dist) {
    00138         best_dist = dist;
    00139         best_depot = depot;
    00140       }
    00141     }
    00142   }
    00143
    00144   return best_depot;
    00145 }
    00146
    00147 static void CheckIfShipNeedsService(Vehicle *v)
    00148 {
    00149   if (Company::Get(v->owner)->settings.vehicle.servint_ships == 0 || !v->NeedsAutomaticServicing()) return;
    00150   if (v->IsChainInDepot()) {
    00151     VehicleServiceInDepot(v);
    00152     return;
    00153   }
    00154
    00155   uint max_distance;
    00156   switch (_settings_game.pf.pathfinder_for_ships) {
    00157     case VPF_OPF:  max_distance = 12; break;
    00158     case VPF_NPF:  max_distance = _settings_game.pf.npf.maximum_go_to_depot_penalty  / NPF_TILE_LENGTH;  break;
    00159     case VPF_YAPF: max_distance = _settings_game.pf.yapf.maximum_go_to_depot_penalty / YAPF_TILE_LENGTH; break;
    00160     default: NOT_REACHED();
    00161   }
    00162
    00163   const Depot *depot = FindClosestShipDepot(v, max_distance);
    00164
    00165   if (depot == NULL) {
    00166     if (v->current_order.IsType(OT_GOTO_DEPOT)) {
    00167       v->current_order.MakeDummy();
    00168       SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00169     }
    00170     return;
    00171   }
    00172
    00173   v->current_order.MakeGoToDepot(depot->index, ODTFB_SERVICE);
    00174   v->dest_tile = depot->xy;
    00175   SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00176 }
    00177
    00181 void Ship::UpdateCache()
    00182 {
    00183   const ShipVehicleInfo *svi = ShipVehInfo(this->engine_type);
    00184
    00185   /* Get speed fraction for the current water type. Aqueducts are always canals. */
    00186   bool is_ocean = GetEffectiveWaterClass(this->tile) == WATER_CLASS_SEA;
    00187   uint raw_speed = GetVehicleProperty(this, PROP_SHIP_SPEED, svi->max_speed);
    00188   this->vcache.cached_max_speed = svi->ApplyWaterClassSpeedFrac(raw_speed, is_ocean);
    00189
    00190   /* Update cargo aging period. */
    00191   this->vcache.cached_cargo_age_period = GetVehicleProperty(this, PROP_SHIP_CARGO_AGE_PERIOD, EngInfo(this->engine_type)->cargo_age_period);
    00192
    00193   this->UpdateVisualEffect();
    00194 }
    00195
    00196 Money Ship::GetRunningCost() const
    00197 {
    00198   const Engine *e = this->GetEngine();
    00199   uint cost_factor = GetVehicleProperty(this, PROP_SHIP_RUNNING_COST_FACTOR, e->u.ship.running_cost);
    00200   return GetPrice(PR_RUNNING_SHIP, cost_factor, e->GetGRF());
    00201 }
    00202
    00203 void Ship::OnNewDay()
    00204 {
    00205   if ((++this->day_counter & 7) == 0) {
    00206     DecreaseVehicleValue(this);
    00207   }
    00208
    00209   CheckVehicleBreakdown(this);
    00210   AgeVehicle(this);
    00211   CheckIfShipNeedsService(this);
    00212
    00213   CheckOrders(this);
    00214
    00215   if (this->running_ticks == 0) return;
    00216
    00217   CommandCost cost(EXPENSES_SHIP_RUN, this->GetRunningCost() * this->running_ticks / (DAYS_IN_YEAR * DAY_TICKS));
    00218
    00219   this->profit_this_year -= cost.GetCost();
    00220   this->running_ticks = 0;
    00221
    00222   SubtractMoneyFromCompanyFract(this->owner, cost);
    00223
    00224   SetWindowDirty(WC_VEHICLE_DETAILS, this->index);
    00225   /* we need this for the profit */
    00226   SetWindowClassesDirty(WC_SHIPS_LIST);
    00227 }
    00228
    00229 Trackdir Ship::GetVehicleTrackdir() const
    00230 {
    00231   if (this->vehstatus & VS_CRASHED) return INVALID_TRACKDIR;
    00232
    00233   if (this->IsInDepot()) {
    00234     /* We'll assume the ship is facing outwards */
    00235     return DiagDirToDiagTrackdir(GetShipDepotDirection(this->tile));
    00236   }
    00237
    00238   if (this->state == TRACK_BIT_WORMHOLE) {
    00239     /* ship on aqueduct, so just use his direction and assume a diagonal track */
    00240     return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
    00241   }
    00242
    00243   return TrackDirectionToTrackdir(FindFirstTrack(this->state), this->direction);
    00244 }
    00245
    00246 void Ship::MarkDirty()
    00247 {
    00248   this->UpdateViewport(false, false);
    00249   this->UpdateCache();
    00250 }
    00251
    00252 static void PlayShipSound(const Vehicle *v)
    00253 {
    00254   if (!PlayVehicleSound(v, VSE_START)) {
    00255     SndPlayVehicleFx(ShipVehInfo(v->engine_type)->sfx, v);
    00256   }
    00257 }
    00258
    00259 void Ship::PlayLeaveStationSound() const
    00260 {
    00261   PlayShipSound(this);
    00262 }
    00263
    00264 TileIndex Ship::GetOrderStationLocation(StationID station)
    00265 {
    00266   if (station == this->last_station_visited) this->last_station_visited = INVALID_STATION;
    00267
    00268   const Station *st = Station::Get(station);
    00269   if (st->dock_tile != INVALID_TILE) {
    00270     return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
    00271   } else {
    00272     this->IncrementRealOrderIndex();
    00273     return 0;
    00274   }
    00275 }
    00276
    00277 void Ship::UpdateDeltaXY(Direction direction)
    00278 {
    00279   static const int8 _delta_xy_table[8][4] = {
    00280     /* y_extent, x_extent, y_offs, x_offs */
    00281     { 6,  6,  -3,  -3}, // N
    00282     { 6, 32,  -3, -16}, // NE
    00283     { 6,  6,  -3,  -3}, // E
    00284     {32,  6, -16,  -3}, // SE
    00285     { 6,  6,  -3,  -3}, // S
    00286     { 6, 32,  -3, -16}, // SW
    00287     { 6,  6,  -3,  -3}, // W
    00288     {32,  6, -16,  -3}, // NW
    00289   };
    00290
    00291   const int8 *bb = _delta_xy_table[direction];
    00292   this->x_offs        = bb[3];
    00293   this->y_offs        = bb[2];
    00294   this->x_extent      = bb[1];
    00295   this->y_extent      = bb[0];
    00296   this->z_extent      = 6;
    00297 }
    00298
    00299 static const TileIndexDiffC _ship_leave_depot_offs[] = {
    00300   {-1,  0},
    00301   { 0, -1}
    00302 };
    00303
    00304 static bool CheckShipLeaveDepot(Ship *v)
    00305 {
    00306   if (!v->IsChainInDepot()) return false;
    00307
    00308   /* We are leaving a depot, but have to go to the exact same one; re-enter */
    00309   if (v->current_order.IsType(OT_GOTO_DEPOT) &&
    00310       IsShipDepotTile(v->tile) && GetDepotIndex(v->tile) == v->current_order.GetDestination()) {
    00311     VehicleEnterDepot(v);
    00312     return true;
    00313   }
    00314
    00315   TileIndex tile = v->tile;
    00316   Axis axis = GetShipDepotAxis(tile);
    00317
    00318   DiagDirection north_dir = ReverseDiagDir(AxisToDiagDir(axis));
    00319   TileIndex north_neighbour = TILE_ADD(tile, ToTileIndexDiff(_ship_leave_depot_offs[axis]));
    00320   DiagDirection south_dir = AxisToDiagDir(axis);
    00321   TileIndex south_neighbour = TILE_ADD(tile, -2 * ToTileIndexDiff(_ship_leave_depot_offs[axis]));
    00322
    00323   TrackBits north_tracks = DiagdirReachesTracks(north_dir) & GetTileShipTrackStatus(north_neighbour);
    00324   TrackBits south_tracks = DiagdirReachesTracks(south_dir) & GetTileShipTrackStatus(south_neighbour);
    00325   if (north_tracks && south_tracks) {
    00326     /* Ask pathfinder for best direction */
    00327     bool reverse = false;
    00328     bool path_found;
    00329     switch (_settings_game.pf.pathfinder_for_ships) {
    00330       case VPF_OPF: reverse = OPFShipChooseTrack(v, north_neighbour, north_dir, north_tracks, path_found) == INVALID_TRACK; break; // OPF always allows reversing
    00331       case VPF_NPF: reverse = NPFShipCheckReverse(v); break;
    00332       case VPF_YAPF: reverse = YapfShipCheckReverse(v); break;
    00333       default: NOT_REACHED();
    00334     }
    00335     if (reverse) north_tracks = TRACK_BIT_NONE;
    00336   }
    00337
    00338   if (north_tracks) {
    00339     /* Leave towards north */
    00340     v->direction = DiagDirToDir(north_dir);
    00341   } else if (south_tracks) {
    00342     /* Leave towards south */
    00343     v->direction = DiagDirToDir(south_dir);
    00344   } else {
    00345     /* Both ways blocked */
    00346     return false;
    00347   }
    00348
    00349   v->state = AxisToTrackBits(axis);
    00350   v->vehstatus &= ~VS_HIDDEN;
    00351
    00352   v->cur_speed = 0;
    00353   v->UpdateViewport(true, true);
    00354   SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
    00355
    00356   PlayShipSound(v);
    00357   VehicleServiceInDepot(v);
    00358   InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
    00359   SetWindowClassesDirty(WC_SHIPS_LIST);
    00360
    00361   return false;
    00362 }
    00363
    00364 static bool ShipAccelerate(Vehicle *v)
    00365 {
    00366   uint spd;
    00367   byte t;
    00368
    00369   spd = min(v->cur_speed + 1, v->vcache.cached_max_speed);
    00370   spd = min(spd, v->current_order.max_speed * 2);
    00371
    00372   /* updates statusbar only if speed have changed to save CPU time */
    00373   if (spd != v->cur_speed) {
    00374     v->cur_speed = spd;
    00375     SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00376   }
    00377
    00378   /* Convert direction-independent speed into direction-dependent speed. (old movement method) */
    00379   spd = v->GetOldAdvanceSpeed(spd);
    00380
    00381   if (spd == 0) return false;
    00382   if ((byte)++spd == 0) return true;
    00383
    00384   v->progress = (t = v->progress) - (byte)spd;
    00385
    00386   return (t < v->progress);
    00387 }
    00388
    00394 static void ShipArrivesAt(const Vehicle *v, Station *st)
    00395 {
    00396   /* Check if station was ever visited before */
    00397   if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
    00398     st->had_vehicle_of_type |= HVOT_SHIP;
    00399
    00400     SetDParam(0, st->index);
    00401     AddVehicleNewsItem(
    00402       STR_NEWS_FIRST_SHIP_ARRIVAL,
    00403       (v->owner == _local_company) ? NT_ARRIVAL_COMPANY : NT_ARRIVAL_OTHER,
    00404       v->index,
    00405       st->index
    00406     );
    00407     AI::NewEvent(v->owner, new ScriptEventStationFirstVehicle(st->index, v->index));
    00408   }
    00409 }
    00410
    00411
    00421 static Track ChooseShipTrack(Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
    00422 {
    00423   assert(IsValidDiagDirection(enterdir));
    00424
    00425   bool path_found = true;
    00426   Track track;
    00427   switch (_settings_game.pf.pathfinder_for_ships) {
    00428     case VPF_OPF: track = OPFShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
    00429     case VPF_NPF: track = NPFShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
    00430     case VPF_YAPF: track = YapfShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
    00431     default: NOT_REACHED();
    00432   }
    00433
    00434   v->HandlePathfindingResult(path_found);
    00435   return track;
    00436 }
    00437
    00438 static const Direction _new_vehicle_direction_table[] = {
    00439   DIR_N , DIR_NW, DIR_W , INVALID_DIR,
    00440   DIR_NE, DIR_N , DIR_SW, INVALID_DIR,
    00441   DIR_E , DIR_SE, DIR_S
    00442 };
    00443
    00444 static Direction ShipGetNewDirectionFromTiles(TileIndex new_tile, TileIndex old_tile)
    00445 {
    00446   uint offs = (TileY(new_tile) - TileY(old_tile) + 1) * 4 +
    00447               TileX(new_tile) - TileX(old_tile) + 1;
    00448   assert(offs < 11 && offs != 3 && offs != 7);
    00449   return _new_vehicle_direction_table[offs];
    00450 }
    00451
    00452 static Direction ShipGetNewDirection(Vehicle *v, int x, int y)
    00453 {
    00454   uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
    00455   assert(offs < 11 && offs != 3 && offs != 7);
    00456   return _new_vehicle_direction_table[offs];
    00457 }
    00458
    00459 static inline TrackBits GetAvailShipTracks(TileIndex tile, DiagDirection dir)
    00460 {
    00461   return GetTileShipTrackStatus(tile) & DiagdirReachesTracks(dir);
    00462 }
    00463
    00464 static const byte _ship_subcoord[4][6][3] = {
    00465   {
    00466     {15, 8, 1},
    00467     { 0, 0, 0},
    00468     { 0, 0, 0},
    00469     {15, 8, 2},
    00470     {15, 7, 0},
    00471     { 0, 0, 0},
    00472   },
    00473   {
    00474     { 0, 0, 0},
    00475     { 8, 0, 3},
    00476     { 7, 0, 2},
    00477     { 0, 0, 0},
    00478     { 8, 0, 4},
    00479     { 0, 0, 0},
    00480   },
    00481   {
    00482     { 0, 8, 5},
    00483     { 0, 0, 0},
    00484     { 0, 7, 6},
    00485     { 0, 0, 0},
    00486     { 0, 0, 0},
    00487     { 0, 8, 4},
    00488   },
    00489   {
    00490     { 0, 0, 0},
    00491     { 8, 15, 7},
    00492     { 0, 0, 0},
    00493     { 8, 15, 6},
    00494     { 0, 0, 0},
    00495     { 7, 15, 0},
    00496   }
    00497 };
    00498
    00499 static void ShipController(Ship *v)
    00500 {
    00501   uint32 r;
    00502   const byte *b;
    00503   Direction dir;
    00504   Track track;
    00505   TrackBits tracks;
    00506
    00507   v->tick_counter++;
    00508   v->current_order_time++;
    00509
    00510   if (v->HandleBreakdown()) return;
    00511
    00512   if (v->vehstatus & VS_STOPPED) return;
    00513
    00514   ProcessOrders(v);
    00515   v->HandleLoading();
    00516
    00517   if (v->current_order.IsType(OT_LOADING)) return;
    00518
    00519   if (CheckShipLeaveDepot(v)) return;
    00520
    00521   v->ShowVisualEffect();
    00522
    00523   if (!ShipAccelerate(v)) return;
    00524
    00525   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00526   if (v->state != TRACK_BIT_WORMHOLE) {
    00527     /* Not on a bridge */
    00528     if (gp.old_tile == gp.new_tile) {
    00529       /* Staying in tile */
    00530       if (v->IsInDepot()) {
    00531         gp.x = v->x_pos;
    00532         gp.y = v->y_pos;
    00533       } else {
    00534         /* Not inside depot */
    00535         r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
    00536         if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
    00537
    00538         /* A leave station order only needs one tick to get processed, so we can
    00539          * always skip ahead. */
    00540         if (v->current_order.IsType(OT_LEAVESTATION)) {
    00541           v->current_order.Free();
    00542           SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00543         } else if (v->dest_tile != 0) {
    00544           /* We have a target, let's see if we reached it... */
    00545           if (v->current_order.IsType(OT_GOTO_WAYPOINT) &&
    00546               DistanceManhattan(v->dest_tile, gp.new_tile) <= 3) {
    00547             /* We got within 3 tiles of our target buoy, so let's skip to our
    00548              * next order */
    00549             UpdateVehicleTimetable(v, true);
    00550             v->IncrementRealOrderIndex();
    00551             v->current_order.MakeDummy();
    00552           } else {
    00553             /* Non-buoy orders really need to reach the tile */
    00554             if (v->dest_tile == gp.new_tile) {
    00555               if (v->current_order.IsType(OT_GOTO_DEPOT)) {
    00556                 if ((gp.x & 0xF) == 8 && (gp.y & 0xF) == 8) {
    00557                   VehicleEnterDepot(v);
    00558                   return;
    00559                 }
    00560               } else if (v->current_order.IsType(OT_GOTO_STATION)) {
    00561                 v->last_station_visited = v->current_order.GetDestination();
    00562
    00563                 /* Process station in the orderlist. */
    00564                 Station *st = Station::Get(v->current_order.GetDestination());
    00565                 if (st->facilities & FACIL_DOCK) { // ugly, ugly workaround for problem with ships able to drop off cargo at wrong stations
    00566                   ShipArrivesAt(v, st);
    00567                   v->BeginLoading();
    00568                 } else { // leave stations without docks right aways
    00569                   v->current_order.MakeLeaveStation();
    00570                   v->IncrementRealOrderIndex();
    00571                 }
    00572               }
    00573             }
    00574           }
    00575         }
    00576       }
    00577     } else {
    00578       /* New tile */
    00579       if (!IsValidTile(gp.new_tile)) goto reverse_direction;
    00580
    00581       dir = ShipGetNewDirectionFromTiles(gp.new_tile, gp.old_tile);
    00582       assert(dir == DIR_NE || dir == DIR_SE || dir == DIR_SW || dir == DIR_NW);
    00583       DiagDirection diagdir = DirToDiagDir(dir);
    00584       tracks = GetAvailShipTracks(gp.new_tile, diagdir);
    00585       if (tracks == TRACK_BIT_NONE) goto reverse_direction;
    00586
    00587       /* Choose a direction, and continue if we find one */
    00588       track = ChooseShipTrack(v, gp.new_tile, diagdir, tracks);
    00589       if (track == INVALID_TRACK) goto reverse_direction;
    00590
    00591       b = _ship_subcoord[diagdir][track];
    00592
    00593       gp.x = (gp.x & ~0xF) | b[0];
    00594       gp.y = (gp.y & ~0xF) | b[1];
    00595
    00596       /* Call the landscape function and tell it that the vehicle entered the tile */
    00597       r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
    00598       if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
    00599
    00600       if (!HasBit(r, VETS_ENTERED_WORMHOLE)) {
    00601         v->tile = gp.new_tile;
    00602         v->state = TrackToTrackBits(track);
    00603
    00604         /* Update ship cache when the water class changes. Aqueducts are always canals. */
    00605         WaterClass old_wc = GetEffectiveWaterClass(gp.old_tile);
    00606         WaterClass new_wc = GetEffectiveWaterClass(gp.new_tile);
    00607         if (old_wc != new_wc) v->UpdateCache();
    00608       }
    00609
    00610       v->direction = (Direction)b[2];
    00611     }
    00612   } else {
    00613     /* On a bridge */
    00614     if (!IsTileType(gp.new_tile, MP_TUNNELBRIDGE) || !HasBit(VehicleEnterTile(v, gp.new_tile, gp.x, gp.y), VETS_ENTERED_WORMHOLE)) {
    00615       v->x_pos = gp.x;
    00616       v->y_pos = gp.y;
    00617       VehicleUpdatePosition(v);
    00618       if ((v->vehstatus & VS_HIDDEN) == 0) VehicleUpdateViewport(v, true);
    00619       return;
    00620     }
    00621   }
    00622
    00623   /* update image of ship, as well as delta XY */
    00624   dir = ShipGetNewDirection(v, gp.x, gp.y);
    00625   v->x_pos = gp.x;
    00626   v->y_pos = gp.y;
    00627   v->z_pos = GetSlopePixelZ(gp.x, gp.y);
    00628
    00629 getout:
    00630   VehicleUpdatePosition(v);
    00631   v->UpdateViewport(true, true);
    00632   return;
    00633
    00634 reverse_direction:
    00635   dir = ReverseDir(v->direction);
    00636   v->direction = dir;
    00637   goto getout;
    00638 }
    00639
    00640 bool Ship::Tick()
    00641 {
    00642   if (!(this->vehstatus & VS_STOPPED)) this->running_ticks++;
    00643
    00644   ShipController(this);
    00645
    00646   return true;
    00647 }
    00648
    00658 CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, const Engine *e, uint16 data, Vehicle **ret)
    00659 {
    00660   tile = GetShipDepotNorthTile(tile);
    00661   if (flags & DC_EXEC) {
    00662     int x;
    00663     int y;
    00664
    00665     const ShipVehicleInfo *svi = &e->u.ship;
    00666
    00667     Ship *v = new Ship();
    00668     *ret = v;
    00669
    00670     v->owner = _current_company;
    00671     v->tile = tile;
    00672     x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
    00673     y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
    00674     v->x_pos = x;
    00675     v->y_pos = y;
    00676     v->z_pos = GetSlopePixelZ(x, y);
    00677
    00678     v->UpdateDeltaXY(v->direction);
    00679     v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
    00680
    00681     v->spritenum = svi->image_index;
    00682     v->cargo_type = e->GetDefaultCargoType();
    00683     v->cargo_cap = svi->capacity;
    00684
    00685     v->last_station_visited = INVALID_STATION;
    00686     v->engine_type = e->index;
    00687
    00688     v->reliability = e->reliability;
    00689     v->reliability_spd_dec = e->reliability_spd_dec;
    00690     v->max_age = e->GetLifeLengthInDays();
    00691     _new_vehicle_id = v->index;
    00692
    00693     v->state = TRACK_BIT_DEPOT;
    00694
    00695     v->SetServiceInterval(Company::Get(_current_company)->settings.vehicle.servint_ships);
    00696     v->date_of_last_service = _date;
    00697     v->build_year = _cur_year;
    00698     v->cur_image = SPR_IMG_QUERY;
    00699     v->random_bits = VehicleRandomBits();
    00700
    00701     v->UpdateCache();
    00702
    00703     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);
    00704     v->SetServiceIntervalIsPercent(Company::Get(_current_company)->settings.vehicle.servint_ispercent);
    00705
    00706     v->InvalidateNewGRFCacheOfChain();
    00707
    00708     v->cargo_cap = e->DetermineCapacity(v);
    00709
    00710     v->InvalidateNewGRFCacheOfChain();
    00711
    00712     VehicleUpdatePosition(v);
    00713   }
    00714
    00715   return CommandCost();
    00716 }
    00717
    00718 bool Ship::FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse)
    00719 {
    00720   const Depot *depot = FindClosestShipDepot(this, 0);
    00721
    00722   if (depot == NULL) return false;
    00723
    00724   if (location    != NULL) *location    = depot->xy;
    00725   if (destination != NULL) *destination = depot->index;
    00726
    00727   return true;
    00728 }