summaryrefslogtreecommitdiff
path: root/src/ship_cmd.cpp
blob: a5c8b9195e428ee212448445e027a2a3bc02b508 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
/* $Id$ */

/** @file ship_cmd.cpp Handling of ships. */

#include "stdafx.h"
#include "ship.h"
#include "landscape.h"
#include "timetable.h"
#include "command_func.h"
#include "station_map.h"
#include "news_func.h"
#include "company_func.h"
#include "npf.h"
#include "depot_base.h"
#include "vehicle_gui.h"
#include "newgrf_engine.h"
#include "yapf/yapf.h"
#include "newgrf_sound.h"
#include "spritecache.h"
#include "strings_func.h"
#include "functions.h"
#include "window_func.h"
#include "date_func.h"
#include "vehicle_func.h"
#include "sound_func.h"
#include "variables.h"
#include "autoreplace_gui.h"
#include "gfx_func.h"
#include "effectvehicle_func.h"
#include "settings_type.h"
#include "ai/ai.hpp"
#include "pathfind.h"

#include "table/strings.h"
#include "table/sprites.h"

static const uint16 _ship_sprites[] = {0x0E5D, 0x0E55, 0x0E65, 0x0E6D};

static const TrackBits _ship_sometracks[4] = {
	TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_LEFT,  // 0x19, // DIAGDIR_NE
	TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_LEFT,  // 0x16, // DIAGDIR_SE
	TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT, // 0x25, // DIAGDIR_SW
	TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_RIGHT, // 0x2A, // DIAGDIR_NW
};

static inline TrackBits GetTileShipTrackStatus(TileIndex tile)
{
	return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
}

static SpriteID GetShipIcon(EngineID engine)
{
	uint8 spritenum = ShipVehInfo(engine)->image_index;

	if (is_custom_sprite(spritenum)) {
		SpriteID sprite = GetCustomVehicleIcon(engine, DIR_W);
		if (sprite != 0) return sprite;

		spritenum = Engine::Get(engine)->image_index;
	}

	return DIR_W + _ship_sprites[spritenum];
}

void DrawShipEngine(int x, int y, EngineID engine, SpriteID pal)
{
	DrawSprite(GetShipIcon(engine), pal, x, y);
}

/** Get the size of the sprite of a ship sprite heading west (used for lists)
 * @param engine The engine to get the sprite from
 * @param width The width of the sprite
 * @param height The height of the sprite
 */
void GetShipSpriteSize(EngineID engine, uint &width, uint &height)
{
	const Sprite *spr = GetSprite(GetShipIcon(engine), ST_NORMAL);

	width  = spr->width;
	height = spr->height;
}

SpriteID Ship::GetImage(Direction direction) const
{
	uint8 spritenum = this->spritenum;

	if (is_custom_sprite(spritenum)) {
		SpriteID sprite = GetCustomVehicleSprite(this, direction);
		if (sprite != 0) return sprite;

		spritenum = Engine::Get(this->engine_type)->image_index;
	}

	return _ship_sprites[spritenum] + direction;
}

static const Depot *FindClosestShipDepot(const Vehicle *v)
{
	if (_settings_game.pf.pathfinder_for_ships == VPF_NPF) { // NPF is used
		Trackdir trackdir = v->GetVehicleTrackdir();
		NPFFoundTargetData ftd = NPFRouteToDepotTrialError(v->tile, trackdir, false, TRANSPORT_WATER, 0, v->owner, INVALID_RAILTYPES);

		if (ftd.best_bird_dist == 0) return GetDepotByTile(ftd.node.tile); // Found target

		return NULL; // Did not find target
	}

	/* OPF or YAPF - find the closest depot */

	const Depot *depot;
	const Depot *best_depot = NULL;
	uint best_dist = UINT_MAX;

	FOR_ALL_DEPOTS(depot) {
		TileIndex tile = depot->xy;
		if (IsShipDepotTile(tile) && IsTileOwner(tile, v->owner)) {
			uint dist = DistanceManhattan(tile, v->tile);
			if (dist < best_dist) {
				best_dist = dist;
				best_depot = depot;
			}
		}
	}

	return best_depot;
}

static void CheckIfShipNeedsService(Vehicle *v)
{
	if (Company::Get(v->owner)->settings.vehicle.servint_ships == 0 || !v->NeedsAutomaticServicing()) return;
	if (v->IsInDepot()) {
		VehicleServiceInDepot(v);
		return;
	}

	const Depot *depot = FindClosestShipDepot(v);

	if (depot == NULL || DistanceManhattan(v->tile, depot->xy) > 12) {
		if (v->current_order.IsType(OT_GOTO_DEPOT)) {
			v->current_order.MakeDummy();
			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
		}
		return;
	}

	v->current_order.MakeGoToDepot(depot->index, ODTFB_SERVICE);
	v->dest_tile = depot->xy;
	InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
}

Money Ship::GetRunningCost() const
{
	return GetVehicleProperty(this, 0x0F, ShipVehInfo(this->engine_type)->running_cost) * _price.ship_running;
}

void Ship::OnNewDay()
{
	if ((++this->day_counter & 7) == 0)
		DecreaseVehicleValue(this);

	CheckVehicleBreakdown(this);
	AgeVehicle(this);
	CheckIfShipNeedsService(this);

	CheckOrders(this);

	if (this->running_ticks == 0) return;

	CommandCost cost(EXPENSES_SHIP_RUN, this->GetRunningCost() * this->running_ticks / (DAYS_IN_YEAR * DAY_TICKS));

	this->profit_this_year -= cost.GetCost();
	this->running_ticks = 0;

	SubtractMoneyFromCompanyFract(this->owner, cost);

	InvalidateWindow(WC_VEHICLE_DETAILS, this->index);
	/* we need this for the profit */
	InvalidateWindowClasses(WC_SHIPS_LIST);
}

Trackdir Ship::GetVehicleTrackdir() const
{
	if (this->vehstatus & VS_CRASHED) return INVALID_TRACKDIR;

	if (this->IsInDepot()) {
		/* We'll assume the ship is facing outwards */
		return DiagDirToDiagTrackdir(GetShipDepotDirection(this->tile));
	}

	if (this->state == TRACK_BIT_WORMHOLE) {
		/* ship on aqueduct, so just use his direction and assume a diagonal track */
		return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
	}

	return TrackDirectionToTrackdir(FindFirstTrack(this->state), this->direction);
}

static void HandleBrokenShip(Vehicle *v)
{
	if (v->breakdown_ctr != 1) {
		v->breakdown_ctr = 1;
		v->cur_speed = 0;

		if (v->breakdowns_since_last_service != 255)
			v->breakdowns_since_last_service++;

		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);

		if (!PlayVehicleSound(v, VSE_BREAKDOWN)) {
			SndPlayVehicleFx((_settings_game.game_creation.landscape != LT_TOYLAND) ?
				SND_10_TRAIN_BREAKDOWN : SND_3A_COMEDY_BREAKDOWN_2, v);
		}

		if (!(v->vehstatus & VS_HIDDEN)) {
			EffectVehicle *u = CreateEffectVehicleRel(v, 4, 4, 5, EV_BREAKDOWN_SMOKE);
			if (u != NULL) u->animation_state = v->breakdown_delay * 2;
		}
	}

	if (!(v->tick_counter & 1)) {
		if (!--v->breakdown_delay) {
			v->breakdown_ctr = 0;
			InvalidateWindow(WC_VEHICLE_VIEW, v->index);
		}
	}
}

void Ship::MarkDirty()
{
	this->cur_image = this->GetImage(this->direction);
	MarkSingleVehicleDirty(this);
}

static void PlayShipSound(const Vehicle *v)
{
	if (!PlayVehicleSound(v, VSE_START)) {
		SndPlayVehicleFx(ShipVehInfo(v->engine_type)->sfx, v);
	}
}

void Ship::PlayLeaveStationSound() const
{
	PlayShipSound(this);
}

TileIndex Ship::GetOrderStationLocation(StationID station)
{
	if (station == this->last_station_visited) this->last_station_visited = INVALID_STATION;

	const Station *st = Station::Get(station);
	if (st->dock_tile != INVALID_TILE) {
		return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
	} else {
		this->IncrementOrderIndex();
		return 0;
	}
}

void Ship::UpdateDeltaXY(Direction direction)
{
#define MKIT(a, b, c, d) ((a & 0xFF) << 24) | ((b & 0xFF) << 16) | ((c & 0xFF) << 8) | ((d & 0xFF) << 0)
	static const uint32 _delta_xy_table[8] = {
		MKIT( 6,  6,  -3,  -3),
		MKIT( 6, 32,  -3, -16),
		MKIT( 6,  6,  -3,  -3),
		MKIT(32,  6, -16,  -3),
		MKIT( 6,  6,  -3,  -3),
		MKIT( 6, 32,  -3, -16),
		MKIT( 6,  6,  -3,  -3),
		MKIT(32,  6, -16,  -3),
	};
#undef MKIT

	uint32 x = _delta_xy_table[direction];
	this->x_offs        = GB(x,  0, 8);
	this->y_offs        = GB(x,  8, 8);
	this->x_extent      = GB(x, 16, 8);
	this->y_extent      = GB(x, 24, 8);
	this->z_extent      = 6;
}

void RecalcShipStuff(Vehicle *v)
{
	v->UpdateDeltaXY(v->direction);
	v->cur_image = v->GetImage(v->direction);
	v->MarkDirty();
	InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
}

static const TileIndexDiffC _ship_leave_depot_offs[] = {
	{-1,  0},
	{ 0, -1}
};

static void CheckShipLeaveDepot(Ship *v)
{
	if (!v->IsInDepot()) return;

	TileIndex tile = v->tile;
	Axis axis = GetShipDepotAxis(tile);

	/* Check first (north) side */
	if (_ship_sometracks[axis] & GetTileShipTrackStatus(TILE_ADD(tile, ToTileIndexDiff(_ship_leave_depot_offs[axis])))) {
		v->direction = ReverseDir(AxisToDirection(axis));
	/* Check second (south) side */
	} else if (_ship_sometracks[axis + 2] & GetTileShipTrackStatus(TILE_ADD(tile, -2 * ToTileIndexDiff(_ship_leave_depot_offs[axis])))) {
		v->direction = AxisToDirection(axis);
	} else {
		return;
	}

	v->state = AxisToTrackBits(axis);
	v->vehstatus &= ~VS_HIDDEN;

	v->cur_speed = 0;
	RecalcShipStuff(v);

	PlayShipSound(v);
	VehicleServiceInDepot(v);
	InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
	InvalidateWindowClasses(WC_SHIPS_LIST);
}

static bool ShipAccelerate(Vehicle *v)
{
	uint spd;
	byte t;

	spd = min(v->cur_speed + 1, GetVehicleProperty(v, 0x0B, v->max_speed));

	/* updates statusbar only if speed have changed to save CPU time */
	if (spd != v->cur_speed) {
		v->cur_speed = spd;
		if (_settings_client.gui.vehicle_speed)
			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
	}

	/* Decrease somewhat when turning */
	if (!(v->direction & 1)) spd = spd * 3 / 4;

	if (spd == 0) return false;
	if ((byte)++spd == 0) return true;

	v->progress = (t = v->progress) - (byte)spd;

	return (t < v->progress);
}

static void ShipArrivesAt(const Vehicle *v, Station *st)
{
	/* Check if station was ever visited before */
	if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
		st->had_vehicle_of_type |= HVOT_SHIP;

		SetDParam(0, st->index);
		AddVehicleNewsItem(
			STR_NEWS_FIRST_SHIP_ARRIVAL,
			(v->owner == _local_company) ? NS_ARRIVAL_COMPANY : NS_ARRIVAL_OTHER,
			v->index,
			st->index
		);
		AI::NewEvent(v->owner, new AIEventStationFirstVehicle(st->index, v->index));
	}
}

struct PathFindShip {
	TileIndex skiptile;
	TileIndex dest_coords;
	uint best_bird_dist;
	uint best_length;
};

static bool ShipTrackFollower(TileIndex tile, PathFindShip *pfs, int track, uint length)
{
	/* Found dest? */
	if (tile == pfs->dest_coords) {
		pfs->best_bird_dist = 0;

		pfs->best_length = minu(pfs->best_length, length);
		return true;
	}

	/* Skip this tile in the calculation */
	if (tile != pfs->skiptile) {
		pfs->best_bird_dist = minu(pfs->best_bird_dist, DistanceMaxPlusManhattan(pfs->dest_coords, tile));
	}

	return false;
}

static const byte _ship_search_directions[6][4] = {
	{ 0, 9, 2, 9 },
	{ 9, 1, 9, 3 },
	{ 9, 0, 3, 9 },
	{ 1, 9, 9, 2 },
	{ 3, 2, 9, 9 },
	{ 9, 9, 1, 0 },
};

static const byte _pick_shiptrack_table[6] = {1, 3, 2, 2, 0, 0};

static uint FindShipTrack(Vehicle *v, TileIndex tile, DiagDirection dir, TrackBits bits, TileIndex skiptile, Track *track)
{
	PathFindShip pfs;
	Track i, best_track;
	uint best_bird_dist = 0;
	uint best_length    = 0;
	uint r;
	byte ship_dir = v->direction & 3;

	pfs.dest_coords = v->dest_tile;
	pfs.skiptile = skiptile;

	best_track = INVALID_TRACK;

	do {
		i = RemoveFirstTrack(&bits);

		pfs.best_bird_dist = UINT_MAX;
		pfs.best_length = UINT_MAX;

		FollowTrack(tile, PATHFIND_FLAGS_SHIP_MODE | PATHFIND_FLAGS_DISABLE_TILE_HASH, TRANSPORT_WATER, 0, (DiagDirection)_ship_search_directions[i][dir], (TPFEnumProc*)ShipTrackFollower, NULL, &pfs);

		if (best_track != INVALID_TRACK) {
			if (pfs.best_bird_dist != 0) {
				/* neither reached the destination, pick the one with the smallest bird dist */
				if (pfs.best_bird_dist > best_bird_dist) goto bad;
				if (pfs.best_bird_dist < best_bird_dist) goto good;
			} else {
				if (pfs.best_length > best_length) goto bad;
				if (pfs.best_length < best_length) goto good;
			}

			/* if we reach this position, there's two paths of equal value so far.
			 * pick one randomly. */
			r = GB(Random(), 0, 8);
			if (_pick_shiptrack_table[i] == ship_dir) r += 80;
			if (_pick_shiptrack_table[best_track] == ship_dir) r -= 80;
			if (r <= 127) goto bad;
		}
good:;
		best_track = i;
		best_bird_dist = pfs.best_bird_dist;
		best_length = pfs.best_length;
bad:;

	} while (bits != 0);

	*track = best_track;
	return best_bird_dist;
}

static inline NPFFoundTargetData PerfNPFRouteToStationOrTile(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, NPFFindStationOrTileData *target, TransportType type, Owner owner, RailTypes railtypes)
{

	void *perf = NpfBeginInterval();
	NPFFoundTargetData ret = NPFRouteToStationOrTile(tile, trackdir, ignore_start_tile, target, type, 0, owner, railtypes);
	int t = NpfEndInterval(perf);
	DEBUG(yapf, 4, "[NPFW] %d us - %d rounds - %d open - %d closed -- ", t, 0, _aystar_stats_open_size, _aystar_stats_closed_size);
	return ret;
}

/** returns the track to choose on the next tile, or -1 when it's better to
 * reverse. The tile given is the tile we are about to enter, enterdir is the
 * direction in which we are entering the tile */
static Track ChooseShipTrack(Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
{
	assert(IsValidDiagDirection(enterdir));

	switch (_settings_game.pf.pathfinder_for_ships) {
		case VPF_YAPF: { // YAPF
			Trackdir trackdir = YapfChooseShipTrack(v, tile, enterdir, tracks);
			if (trackdir != INVALID_TRACKDIR) return TrackdirToTrack(trackdir);
		} break;

		case VPF_NPF: { // NPF
			NPFFindStationOrTileData fstd;
			Trackdir trackdir = v->GetVehicleTrackdir();
			assert(trackdir != INVALID_TRACKDIR); // Check that we are not in a depot

			NPFFillWithOrderData(&fstd, v);

			NPFFoundTargetData ftd = PerfNPFRouteToStationOrTile(tile - TileOffsByDiagDir(enterdir), trackdir, true, &fstd, TRANSPORT_WATER, v->owner, INVALID_RAILTYPES);

			/* If ftd.best_bird_dist is 0, we found our target and ftd.best_trackdir contains
			 * the direction we need to take to get there, if ftd.best_bird_dist is not 0,
			 * we did not find our target, but ftd.best_trackdir contains the direction leading
			 * to the tile closest to our target. */
			if (ftd.best_trackdir != 0xff) return TrackdirToTrack(ftd.best_trackdir); // TODO: Wrapper function?
		} break;

		default:
		case VPF_OPF: { // OPF
			TileIndex tile2 = TILE_ADD(tile, -TileOffsByDiagDir(enterdir));
			Track track;

			/* Let's find out how far it would be if we would reverse first */
			TrackBits b = GetTileShipTrackStatus(tile2) & _ship_sometracks[ReverseDiagDir(enterdir)] & v->state;

			uint distr = UINT_MAX; // distance if we reversed
			if (b != 0) {
				distr = FindShipTrack(v, tile2, ReverseDiagDir(enterdir), b, tile, &track);
				if (distr != UINT_MAX) distr++; // penalty for reversing
			}

			/* And if we would not reverse? */
			uint dist = FindShipTrack(v, tile, enterdir, tracks, 0, &track);

			if (dist <= distr) return track;
		} break;
	}

	return INVALID_TRACK; // We could better reverse
}

static const Direction _new_vehicle_direction_table[] = {
	DIR_N , DIR_NW, DIR_W , INVALID_DIR,
	DIR_NE, DIR_N , DIR_SW, INVALID_DIR,
	DIR_E , DIR_SE, DIR_S
};

static Direction ShipGetNewDirectionFromTiles(TileIndex new_tile, TileIndex old_tile)
{
	uint offs = (TileY(new_tile) - TileY(old_tile) + 1) * 4 +
							TileX(new_tile) - TileX(old_tile) + 1;
	assert(offs < 11 && offs != 3 && offs != 7);
	return _new_vehicle_direction_table[offs];
}

static Direction ShipGetNewDirection(Vehicle *v, int x, int y)
{
	uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
	assert(offs < 11 && offs != 3 && offs != 7);
	return _new_vehicle_direction_table[offs];
}

static inline TrackBits GetAvailShipTracks(TileIndex tile, int dir)
{
	return GetTileShipTrackStatus(tile) & _ship_sometracks[dir];
}

static const byte _ship_subcoord[4][6][3] = {
	{
		{15, 8, 1},
		{ 0, 0, 0},
		{ 0, 0, 0},
		{15, 8, 2},
		{15, 7, 0},
		{ 0, 0, 0},
	},
	{
		{ 0, 0, 0},
		{ 8, 0, 3},
		{ 7, 0, 2},
		{ 0, 0, 0},
		{ 8, 0, 4},
		{ 0, 0, 0},
	},
	{
		{ 0, 8, 5},
		{ 0, 0, 0},
		{ 0, 7, 6},
		{ 0, 0, 0},
		{ 0, 0, 0},
		{ 0, 8, 4},
	},
	{
		{ 0, 0, 0},
		{ 8, 15, 7},
		{ 0, 0, 0},
		{ 8, 15, 6},
		{ 0, 0, 0},
		{ 7, 15, 0},
	}
};

static void ShipController(Ship *v)
{
	uint32 r;
	const byte *b;
	Direction dir;
	Track track;
	TrackBits tracks;

	v->tick_counter++;
	v->current_order_time++;

	if (v->breakdown_ctr != 0) {
		if (v->breakdown_ctr <= 2) {
			HandleBrokenShip(v);
			return;
		}
		if (!v->current_order.IsType(OT_LOADING)) v->breakdown_ctr--;
	}

	if (v->vehstatus & VS_STOPPED) return;

	ProcessOrders(v);
	v->HandleLoading();

	if (v->current_order.IsType(OT_LOADING)) return;

	CheckShipLeaveDepot(v);

	if (!ShipAccelerate(v)) return;

	GetNewVehiclePosResult gp = GetNewVehiclePos(v);
	if (v->state != TRACK_BIT_WORMHOLE) {
		/* Not on a bridge */
		if (gp.old_tile == gp.new_tile) {
			/* Staying in tile */
			if (v->IsInDepot()) {
				gp.x = v->x_pos;
				gp.y = v->y_pos;
			} else {
				/* Not inside depot */
				r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
				if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;

				/* A leave station order only needs one tick to get processed, so we can
				 * always skip ahead. */
				if (v->current_order.IsType(OT_LEAVESTATION)) {
					v->current_order.Free();
					InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
				} else if (v->dest_tile != 0) {
					/* We have a target, let's see if we reached it... */
					if (v->current_order.IsType(OT_GOTO_STATION) &&
							Station::Get(v->current_order.GetDestination())->IsBuoy() &&
							DistanceManhattan(v->dest_tile, gp.new_tile) <= 3) {
						/* We got within 3 tiles of our target buoy, so let's skip to our
						 * next order */
						UpdateVehicleTimetable(v, true);
						v->IncrementOrderIndex();
						v->current_order.MakeDummy();
					} else {
						/* Non-buoy orders really need to reach the tile */
						if (v->dest_tile == gp.new_tile) {
							if (v->current_order.IsType(OT_GOTO_DEPOT)) {
								if ((gp.x & 0xF) == 8 && (gp.y & 0xF) == 8) {
									VehicleEnterDepot(v);
									return;
								}
							} else if (v->current_order.IsType(OT_GOTO_STATION)) {
								v->last_station_visited = v->current_order.GetDestination();

								/* Process station in the orderlist. */
								Station *st = Station::Get(v->current_order.GetDestination());
								if (st->facilities & FACIL_DOCK) { // ugly, ugly workaround for problem with ships able to drop off cargo at wrong stations
									ShipArrivesAt(v, st);
									v->BeginLoading();
								} else { // leave stations without docks right aways
									v->current_order.MakeLeaveStation();
									v->IncrementOrderIndex();
								}
							}
						}
					}
				}
			}
		} else {
			DiagDirection diagdir;
			/* New tile */
			if (TileX(gp.new_tile) >= MapMaxX() || TileY(gp.new_tile) >= MapMaxY()) {
				goto reverse_direction;
			}

			dir = ShipGetNewDirectionFromTiles(gp.new_tile, gp.old_tile);
			assert(dir == DIR_NE || dir == DIR_SE || dir == DIR_SW || dir == DIR_NW);
			diagdir = DirToDiagDir(dir);
			tracks = GetAvailShipTracks(gp.new_tile, diagdir);
			if (tracks == TRACK_BIT_NONE) goto reverse_direction;

			/* Choose a direction, and continue if we find one */
			track = ChooseShipTrack(v, gp.new_tile, diagdir, tracks);
			if (track == INVALID_TRACK) goto reverse_direction;

			b = _ship_subcoord[diagdir][track];

			gp.x = (gp.x & ~0xF) | b[0];
			gp.y = (gp.y & ~0xF) | b[1];

			/* Call the landscape function and tell it that the vehicle entered the tile */
			r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
			if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;

			if (!HasBit(r, VETS_ENTERED_WORMHOLE)) {
				v->tile = gp.new_tile;
				v->state = TrackToTrackBits(track);
			}

			v->direction = (Direction)b[2];
		}
	} else {
		/* On a bridge */
		if (!IsTileType(gp.new_tile, MP_TUNNELBRIDGE) || !HasBit(VehicleEnterTile(v, gp.new_tile, gp.x, gp.y), VETS_ENTERED_WORMHOLE)) {
			v->x_pos = gp.x;
			v->y_pos = gp.y;
			VehicleMove(v, !(v->vehstatus & VS_HIDDEN));
			return;
		}
	}

	/* update image of ship, as well as delta XY */
	dir = ShipGetNewDirection(v, gp.x, gp.y);
	v->x_pos = gp.x;
	v->y_pos = gp.y;
	v->z_pos = GetSlopeZ(gp.x, gp.y);

getout:
	v->UpdateDeltaXY(dir);
	v->cur_image = v->GetImage(dir);
	VehicleMove(v, true);
	return;

reverse_direction:
	dir = ReverseDir(v->direction);
	v->direction = dir;
	goto getout;
}

static void AgeShipCargo(Vehicle *v)
{
	if (_age_cargo_skip_counter != 0) return;
	v->cargo.AgeCargo();
}

bool Ship::Tick()
{
	if (!(this->vehstatus & VS_STOPPED)) this->running_ticks++;

	AgeShipCargo(this);
	ShipController(this);

	return true;
}

/** Build a ship.
 * @param tile tile of depot where ship is built
 * @param flags type of operation
 * @param p1 ship type being built (engine)
 * @param p2 unused
 */
CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	UnitID unit_num;

	if (!IsEngineBuildable(p1, VEH_SHIP, _current_company)) return_cmd_error(STR_SHIP_NOT_AVAILABLE);

	const Engine *e = Engine::Get(p1);
	CommandCost value(EXPENSES_NEW_VEHICLES, e->GetCost());

	/* Engines without valid cargo should not be available */
	if (e->GetDefaultCargoType() == CT_INVALID) return CMD_ERROR;

	if (flags & DC_QUERY_COST) return value;

	/* The ai_new queries the vehicle cost before building the route,
	 * so we must check against cheaters no sooner than now. --pasky */
	if (!IsShipDepotTile(tile)) return CMD_ERROR;
	if (!IsTileOwner(tile, _current_company)) return CMD_ERROR;

	unit_num = (flags & DC_AUTOREPLACE) ? 0 : GetFreeUnitNumber(VEH_SHIP);

	if (!Vehicle::CanAllocateItem() || unit_num > _settings_game.vehicle.max_ships)
		return_cmd_error(STR_ERROR_TOO_MANY_VEHICLES_IN_GAME);

	if (flags & DC_EXEC) {
		int x;
		int y;

		const ShipVehicleInfo *svi = ShipVehInfo(p1);

		Ship *v = new Ship();
		v->unitnumber = unit_num;

		v->owner = _current_company;
		v->tile = tile;
		x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
		y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
		v->x_pos = x;
		v->y_pos = y;
		v->z_pos = GetSlopeZ(x, y);

		v->running_ticks = 0;

		v->UpdateDeltaXY(v->direction);
		v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;

		v->spritenum = svi->image_index;
		v->cargo_type = e->GetDefaultCargoType();
		v->cargo_subtype = 0;
		v->cargo_cap = svi->capacity;
		v->value = value.GetCost();

		v->last_station_visited = INVALID_STATION;
		v->max_speed = svi->max_speed;
		v->engine_type = p1;

		v->reliability = e->reliability;
		v->reliability_spd_dec = e->reliability_spd_dec;
		v->max_age = e->lifelength * DAYS_IN_LEAP_YEAR;
		_new_vehicle_id = v->index;

		v->name = NULL;
		v->state = TRACK_BIT_DEPOT;

		v->service_interval = Company::Get(_current_company)->settings.vehicle.servint_ships;
		v->date_of_last_service = _date;
		v->build_year = _cur_year;
		v->cur_image = SPR_IMG_QUERY;
		v->random_bits = VehicleRandomBits();

		v->vehicle_flags = 0;
		if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);

		v->InvalidateNewGRFCacheOfChain();

		v->cargo_cap = GetVehicleProperty(v, 0x0D, svi->capacity);

		v->InvalidateNewGRFCacheOfChain();

		VehicleMove(v, false);

		InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
		InvalidateWindowClassesData(WC_SHIPS_LIST, 0);
		InvalidateWindow(WC_COMPANY, v->owner);
		if (IsLocalCompany())
			InvalidateAutoreplaceWindow(v->engine_type, v->group_id); // updates the replace Ship window

		Company::Get(_current_company)->num_engines[p1]++;
	}

	return value;
}

/** Sell a ship.
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle ID to be sold
 * @param p2 unused
 */
CommandCost CmdSellShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	Ship *v = Ship::GetIfValid(p1);
	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;

	if (HASBITS(v->vehstatus, VS_CRASHED)) return_cmd_error(STR_CAN_T_SELL_DESTROYED_VEHICLE);

	if (!v->IsStoppedInDepot()) {
		return_cmd_error(STR_ERROR_SHIP_MUST_BE_STOPPED_IN_DEPOT);
	}

	CommandCost ret(EXPENSES_NEW_VEHICLES, -v->value);

	if (flags & DC_EXEC) {
		delete v;
	}

	return ret;
}

bool Ship::FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse)
{
	const Depot *depot = FindClosestShipDepot(this);

	if (depot == NULL) return false;

	if (location    != NULL) *location    = depot->xy;
	if (destination != NULL) *destination = depot->index;

	return true;
}

/** Send a ship to the depot.
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle ID to send to the depot
 * @param p2 various bitmasked elements
 * - p2 bit 0-3 - DEPOT_ flags (see vehicle.h)
 * - p2 bit 8-10 - VLW flag (for mass goto depot)
 */
CommandCost CmdSendShipToDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	if (p2 & DEPOT_MASS_SEND) {
		/* Mass goto depot requested */
		if (!ValidVLWFlags(p2 & VLW_MASK)) return CMD_ERROR;
		return SendAllVehiclesToDepot(VEH_SHIP, flags, p2 & DEPOT_SERVICE, _current_company, (p2 & VLW_MASK), p1);
	}

	Ship *v = Ship::GetIfValid(p1);
	if (v == NULL) return CMD_ERROR;

	return v->SendToDepot(flags, (DepotCommand)(p2 & DEPOT_COMMAND_MASK));
}


/** Refits a ship to the specified cargo type.
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle ID of the ship to refit
 * @param p2 various bitstuffed elements
 * - p2 = (bit 0-7) - the new cargo type to refit to (p2 & 0xFF)
 * - p2 = (bit 8-15) - the new cargo subtype to refit to
 * - p2 = (bit 16) - refit only this vehicle (ignored)
 * @return cost of refit or error
 */
CommandCost CmdRefitShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	CommandCost cost(EXPENSES_SHIP_RUN);
	CargoID new_cid = GB(p2, 0, 8); // gets the cargo number
	byte new_subtype = GB(p2, 8, 8);
	uint16 capacity = CALLBACK_FAILED;

	Ship *v = Ship::GetIfValid(p1);

	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;
	if (!v->IsStoppedInDepot()) return_cmd_error(STR_ERROR_SHIP_MUST_BE_STOPPED_IN_DEPOT);
	if (v->vehstatus & VS_CRASHED) return_cmd_error(STR_CAN_T_REFIT_DESTROYED_VEHICLE);

	/* Check cargo */
	if (!ShipVehInfo(v->engine_type)->refittable) return CMD_ERROR;
	if (new_cid >= NUM_CARGO || !CanRefitTo(v->engine_type, new_cid)) return CMD_ERROR;

	/* Check the refit capacity callback */
	if (HasBit(EngInfo(v->engine_type)->callbackmask, CBM_VEHICLE_REFIT_CAPACITY)) {
		/* Back up the existing cargo type */
		CargoID temp_cid = v->cargo_type;
		byte temp_subtype = v->cargo_subtype;
		v->cargo_type = new_cid;
		v->cargo_subtype = new_subtype;

		capacity = GetVehicleCallback(CBID_VEHICLE_REFIT_CAPACITY, 0, 0, v->engine_type, v);

		/* Restore the cargo type */
		v->cargo_type = temp_cid;
		v->cargo_subtype = temp_subtype;
	}

	if (capacity == CALLBACK_FAILED) {
		capacity = GetVehicleProperty(v, 0x0D, ShipVehInfo(v->engine_type)->capacity);
	}
	_returned_refit_capacity = capacity;

	if (new_cid != v->cargo_type) {
		cost = GetRefitCost(v->engine_type);
	}

	if (flags & DC_EXEC) {
		v->cargo_cap = capacity;
		v->cargo.Truncate((v->cargo_type == new_cid) ? capacity : 0);
		v->cargo_type = new_cid;
		v->cargo_subtype = new_subtype;
		v->colourmap = PAL_NONE; // invalidate vehicle colour map
		v->InvalidateNewGRFCacheOfChain();
		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
		InvalidateWindowClassesData(WC_SHIPS_LIST, 0);
	}

	return cost;

}