ship_cmd.c
changeset 0 29654efe3188
child 11 836bc4b37b5b
equal deleted inserted replaced
-1:000000000000 0:29654efe3188
       
     1 #include "stdafx.h"
       
     2 #include "ttd.h"
       
     3 #include "vehicle.h"
       
     4 #include "command.h"
       
     5 #include "pathfind.h"
       
     6 #include "station.h"
       
     7 #include "gfx.h"
       
     8 #include "news.h"
       
     9 #include "engine.h"
       
    10 #include "gui.h"
       
    11 #include "player.h"
       
    12 
       
    13 
       
    14 static const uint16 _ship_sprites[] = {0x0E5D, 0x0E55, 0x0E65, 0x0E6D};
       
    15 static const byte _ship_sometracks[4] = {0x19, 0x16, 0x25, 0x2A};
       
    16 
       
    17 static byte GetTileShipTrackStatus(uint tile) {
       
    18 	uint32 r = GetTileTrackStatus(tile, 4);
       
    19 	return r | r >> 8;
       
    20 }
       
    21 
       
    22 void DrawShipEngine(int x, int y, int engine, uint32 image_ormod)
       
    23 {
       
    24 	int spritenum = ship_vehicle_info(engine).image_index;
       
    25 
       
    26 	if (is_custom_sprite(spritenum)) {
       
    27 		int sprite = GetCustomEngineSprite(engine, 0xffff, CID_PURCHASE, 0, 0, 6);
       
    28 
       
    29 		if (sprite) {
       
    30 			DrawSprite(sprite | image_ormod, x, y);
       
    31 			return;
       
    32 		}
       
    33 		spritenum = _engine_original_sprites[engine];
       
    34 	}
       
    35 	DrawSprite((6 + _ship_sprites[spritenum]) | image_ormod, x, y);
       
    36 }
       
    37 
       
    38 void DrawShipEngineInfo(int engine, int x, int y, int maxw)
       
    39 {
       
    40 	ShipVehicleInfo *svi = &ship_vehicle_info(engine);
       
    41 	SET_DPARAM32(0, svi->base_cost * (_price.ship_base>>3)>>5);
       
    42 	SET_DPARAM16(1, svi->max_speed * 10 >> 5);
       
    43 	SET_DPARAM16(2, _cargoc.names_long_p[svi->cargo_type]);
       
    44 	SET_DPARAM16(3, svi->capacity);
       
    45 	SET_DPARAM32(4, svi->running_cost * _price.ship_running >> 8);
       
    46 	DrawStringMultiCenter(x, y, STR_982E_COST_MAX_SPEED_CAPACITY, maxw);
       
    47 }
       
    48 
       
    49 int GetShipImage(Vehicle *v, byte direction)
       
    50 {
       
    51 	int spritenum = v->spritenum;
       
    52 
       
    53 	if (is_custom_sprite(spritenum)) {
       
    54 		int sprite = GetCustomVehicleSprite(v, direction);
       
    55 
       
    56 		if (sprite) return sprite;
       
    57 		spritenum = _engine_original_sprites[v->engine_type];
       
    58 	}
       
    59 	return _ship_sprites[spritenum] + direction;
       
    60 }
       
    61 
       
    62 static int FindClosestShipDepot(Vehicle *v)
       
    63 {
       
    64 	uint tile, dist, best_dist = (uint)-1;
       
    65 	int best_depot = -1;
       
    66 	int i;
       
    67 	byte owner = v->owner;
       
    68 	uint tile2 = v->tile;
       
    69 
       
    70 	for(i=0; i!=lengthof(_depots); i++) {
       
    71 		tile = _depots[i].xy;
       
    72 		if (IS_TILETYPE(tile, MP_WATER) && _map_owner[tile] == owner) {
       
    73 			dist = GetTileDist(tile, tile2);
       
    74 			if (dist < best_dist) {
       
    75 				best_dist = dist;
       
    76 				best_depot = i;
       
    77 			}
       
    78 		}
       
    79 	}
       
    80 
       
    81 	return best_depot;
       
    82 }
       
    83 
       
    84 static void CheckIfShipNeedsService(Vehicle *v)
       
    85 {
       
    86 	int i;
       
    87 
       
    88 	if (v->date_of_last_service + v->service_interval > _date)
       
    89 		return;
       
    90 
       
    91 	if (v->vehstatus & VS_STOPPED)
       
    92 		return;
       
    93 	
       
    94 	if ((v->next_order & (OT_MASK | OF_FULL_LOAD)) == (OT_GOTO_DEPOT | OF_FULL_LOAD))
       
    95 		return;
       
    96 
       
    97 	if (_patches.gotodepot && IS_HUMAN_PLAYER(v->owner) && ScheduleHasDepotOrders(v->schedule_ptr))
       
    98 		return;
       
    99 
       
   100 	i = FindClosestShipDepot(v);
       
   101 
       
   102 	if (i < 0 || GetTileDist(v->tile, (&_depots[i])->xy) > 12) {
       
   103 		if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT) {
       
   104 			v->next_order = OT_DUMMY;
       
   105 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
       
   106 		}
       
   107 		return;
       
   108 	}
       
   109 
       
   110 	v->next_order = OT_GOTO_DEPOT | OF_NON_STOP;
       
   111 	v->next_order_param = (byte)i;
       
   112 	v->dest_tile = (&_depots[i])->xy;
       
   113 	InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);		
       
   114 }
       
   115 
       
   116 void OnNewDay_Ship(Vehicle *v)
       
   117 {
       
   118 	int32 cost;
       
   119 
       
   120 	if ((++v->day_counter & 7) == 0)
       
   121 		DecreaseVehicleValue(v);
       
   122 
       
   123 	CheckVehicleBreakdown(v);
       
   124 	AgeVehicle(v);
       
   125 	CheckIfShipNeedsService(v);
       
   126 
       
   127 	if (v->vehstatus & VS_STOPPED)
       
   128 		return;
       
   129 
       
   130 	cost = ship_vehicle_info(v->engine_type).running_cost * _price.ship_running / 364;
       
   131 	v->profit_this_year -= cost >> 8;
       
   132 
       
   133 	SET_EXPENSES_TYPE(EXPENSES_SHIP_RUN);
       
   134 	SubtractMoneyFromPlayerFract(v->owner, cost);
       
   135 
       
   136 	InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
       
   137 	InvalidateWindow(WC_SHIPS_LIST, v->owner);
       
   138 }
       
   139 
       
   140 static void HandleBrokenShip(Vehicle *v)
       
   141 {
       
   142 	if (v->breakdown_ctr != 1) {
       
   143 		v->breakdown_ctr = 1;
       
   144 		v->cur_speed = 0;
       
   145 
       
   146 		if (v->breakdowns_since_last_service != 255)
       
   147 			v->breakdowns_since_last_service++;
       
   148 		
       
   149 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
       
   150 		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
       
   151 		
       
   152 		SndPlayVehicleFx((_opt.landscape != LT_CANDY) ? 0xE : 0x3A, v);
       
   153 
       
   154 		if (!(v->vehstatus & VS_HIDDEN)) {
       
   155 			Vehicle *u = CreateEffectVehicleRel(v, 4, 4, 5, EV_BREAKDOWN_SMOKE);
       
   156 			if (u)
       
   157 				u->u.special.unk0 = v->breakdown_delay * 2;
       
   158 		}
       
   159 	}
       
   160 
       
   161 	if (!(v->tick_counter & 1)) {
       
   162 		if (!--v->breakdown_delay) {
       
   163 			v->breakdown_ctr = 0;
       
   164 			InvalidateWindow(WC_VEHICLE_VIEW, v->index);
       
   165 		}
       
   166 	}
       
   167 }
       
   168 
       
   169 static void MarkShipDirty(Vehicle *v)
       
   170 {
       
   171 	v->cur_image = GetShipImage(v, v->direction);
       
   172 	MarkAllViewportsDirty(v->left_coord, v->top_coord, v->right_coord + 1, v->bottom_coord + 1);
       
   173 }
       
   174 
       
   175 static void PlayShipSound(Vehicle *v)
       
   176 {
       
   177 	SndPlayVehicleFx(ship_vehicle_info(v->engine_type).sfx, v);
       
   178 }
       
   179 
       
   180 static const TileIndexDiff _dock_offs[] = {
       
   181 	TILE_XY(2, 0),
       
   182 	TILE_XY(-2, 0),
       
   183 	TILE_XY(0, 2),
       
   184 	TILE_XY(2, 0),
       
   185 	TILE_XY(0, -2),
       
   186 	TILE_XY(0,0),
       
   187 	TILE_XY(0,0),
       
   188 	TILE_XY(0,0),
       
   189 };
       
   190 
       
   191 static void ProcessShipOrder(Vehicle *v)
       
   192 {
       
   193 	uint order;
       
   194 	Station *st;
       
   195 
       
   196 	if ((v->next_order & OT_MASK) >= OT_GOTO_DEPOT && (v->next_order & OT_MASK) <= OT_LEAVESTATION) {
       
   197 		if ((v->next_order & (OT_MASK|OF_UNLOAD)) != (OT_GOTO_DEPOT|OF_UNLOAD))
       
   198 			return;
       
   199 	}
       
   200 
       
   201 	if ((v->next_order & (OT_MASK|OF_UNLOAD|OF_FULL_LOAD)) == (OT_GOTO_DEPOT|OF_UNLOAD|OF_FULL_LOAD) &&
       
   202 		v->date_of_last_service+v->service_interval > _date) {
       
   203 		v->cur_order_index++;
       
   204 	}
       
   205 
       
   206 
       
   207 	if (v->cur_order_index >= v->num_orders)
       
   208 		v->cur_order_index = 0;
       
   209 
       
   210 	order = v->schedule_ptr[v->cur_order_index];
       
   211 
       
   212 	if (order == 0) {
       
   213 		v->next_order = OT_NOTHING;
       
   214 		v->dest_tile = 0;
       
   215 		return;
       
   216 	}
       
   217 
       
   218 	if (order == (uint)((v->next_order | (v->next_order_param<<8))))
       
   219 		return;
       
   220 
       
   221 	v->next_order = (byte)order;
       
   222 	v->next_order_param = (byte)(order >> 8);
       
   223 
       
   224 	if ((order & OT_MASK) == OT_GOTO_STATION) {
       
   225 		if ( (byte)(order >> 8) == v->last_station_visited)
       
   226 			v->last_station_visited = 0xFF;
       
   227 		
       
   228 		st = DEREF_STATION(order >> 8);
       
   229 		if (st->dock_tile != 0) {
       
   230 			v->dest_tile = TILE_ADD(st->dock_tile, _dock_offs[_map5[st->dock_tile]-0x4B]);
       
   231 		}
       
   232 	} else if ((order & OT_MASK) == OT_GOTO_DEPOT) {
       
   233 		v->dest_tile = _depots[order >> 8].xy;
       
   234 	} else {
       
   235 		v->dest_tile = 0;
       
   236 	}
       
   237 	InvalidateVehicleOrderWidget(v);
       
   238 }
       
   239 
       
   240 static void HandleShipLoading(Vehicle *v)
       
   241 {
       
   242 	if (v->next_order == OT_NOTHING)
       
   243 		return;
       
   244 	
       
   245 	if (v->next_order != OT_DUMMY) {
       
   246 		if ((v->next_order&OT_MASK) != OT_LOADING)
       
   247 			return;
       
   248 
       
   249 		if (--v->load_unload_time_rem)
       
   250 			return;
       
   251 
       
   252 		if (v->next_order&OF_FULL_LOAD && CanFillVehicle(v)) {
       
   253 			SET_EXPENSES_TYPE(EXPENSES_SHIP_INC);
       
   254 			if (LoadUnloadVehicle(v)) {
       
   255 				InvalidateWindow(WC_SHIPS_LIST, v->owner);
       
   256 				MarkShipDirty(v);
       
   257 			}
       
   258 			return;
       
   259 		}
       
   260 		PlayShipSound(v);
       
   261 		
       
   262 		{
       
   263 			byte b = v->next_order;
       
   264 			v->next_order = OT_LEAVESTATION;
       
   265 			if (!(b & OF_NON_STOP))
       
   266 				return;
       
   267 		}
       
   268 	}
       
   269 
       
   270 	v->cur_order_index++;
       
   271 	InvalidateVehicleOrderWidget(v);
       
   272 }
       
   273 
       
   274 static void UpdateShipDeltaXY(Vehicle *v, int dir)
       
   275 {
       
   276 #define MKIT(d,c,b,a) ((a&0xFF)<<24) | ((b&0xFF)<<16) | ((c&0xFF)<<8) | ((d&0xFF)<<0)
       
   277 	static const uint32 _delta_xy_table[8] = {
       
   278 		MKIT( -3, -3,  6,  6),
       
   279 		MKIT(-16, -3, 32,  6),
       
   280 		MKIT( -3, -3,  6,  6),
       
   281 		MKIT( -3,-16,  6, 32),
       
   282 		MKIT( -3, -3,  6,  6),
       
   283 		MKIT(-16, -3, 32,  6),
       
   284 		MKIT( -3, -3,  6,  6),
       
   285 		MKIT( -3,-16,  6, 32),
       
   286 	};
       
   287 #undef MKIT
       
   288 	uint32 x = _delta_xy_table[dir];
       
   289 	v->x_offs = (byte)x;
       
   290 	v->y_offs = (byte)(x>>=8);
       
   291 	v->sprite_width = (byte)(x>>=8);
       
   292 	v->sprite_height = (byte)(x>>=8);
       
   293 }
       
   294 
       
   295 static void RecalcShipStuff(Vehicle *v)
       
   296 {
       
   297 	UpdateShipDeltaXY(v, v->direction);
       
   298 	v->cur_image = GetShipImage(v, v->direction);
       
   299 	MarkShipDirty(v);
       
   300 	InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
       
   301 }
       
   302 
       
   303 static const TileIndexDiff _ship_leave_depot_offs[] = {
       
   304 	TILE_XY(-1,0),
       
   305 	TILE_XY(0,-1),
       
   306 };
       
   307 
       
   308 static void CheckShipLeaveDepot(Vehicle *v)
       
   309 {
       
   310 	uint tile;
       
   311 	int d;
       
   312 	uint m;
       
   313 
       
   314 	if (v->u.ship.state != 0x80)
       
   315 		return;
       
   316 
       
   317 	tile = v->tile;
       
   318 	d = (_map5[tile]&2) ? 1 : 0;
       
   319 
       
   320 	// Check first side
       
   321 	if (_ship_sometracks[d] & GetTileShipTrackStatus(TILE_ADD(tile,_ship_leave_depot_offs[d]))) {
       
   322 		m = (d==0) ? 0x101 : 0x207;
       
   323 	// Check second side
       
   324 	} else if (_ship_sometracks[d+2] & GetTileShipTrackStatus(TILE_ADD(tile, -2*_ship_leave_depot_offs[d]))) {
       
   325 		m = (d==0) ? 0x105 : 0x203;
       
   326 	} else {
       
   327 		return;
       
   328 	}
       
   329 	v->direction = (byte)m;
       
   330 	v->u.ship.state = (byte)(m >> 8);
       
   331 	v->vehstatus &= ~VS_HIDDEN;
       
   332 
       
   333 	v->cur_speed = 0;
       
   334 	RecalcShipStuff(v);
       
   335 
       
   336 	PlayShipSound(v);
       
   337 }
       
   338 
       
   339 static bool ShipAccelerate(Vehicle *v)
       
   340 {
       
   341 	uint spd;
       
   342 	byte t;
       
   343 
       
   344 	spd = min(v->cur_speed + 1, v->max_speed);
       
   345 
       
   346 	//updates statusbar only if speed have changed to save CPU time
       
   347 	if (spd != v->cur_speed) {
       
   348 		v->cur_speed = spd;	
       
   349 		if (_patches.vehicle_speed)
       
   350 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
       
   351 	}
       
   352 
       
   353 	// Decrease somewhat when turning
       
   354 	if (!(v->direction&1)) {
       
   355 		spd = spd * 3 >> 2;
       
   356 	}
       
   357 
       
   358 	if (spd == 0)
       
   359 		return false;
       
   360 
       
   361 	if ((byte)++spd == 0)
       
   362 		return true;
       
   363 
       
   364 	v->progress = (t = v->progress) - (byte)spd;
       
   365 
       
   366 	return (t < v->progress);
       
   367 }
       
   368 
       
   369 
       
   370 static int32 EstimateShipCost(uint16 engine_type);
       
   371 
       
   372 static void ShipEnterDepot(Vehicle *v)
       
   373 {
       
   374 	byte t;
       
   375 
       
   376 	v->u.ship.state = 0x80;
       
   377 	v->vehstatus |= VS_HIDDEN;
       
   378 	v->cur_speed = 0;
       
   379 	RecalcShipStuff(v);
       
   380 	
       
   381 	v->date_of_last_service = _date;
       
   382 	v->breakdowns_since_last_service = 0;
       
   383 	v->reliability = _engines[v->engine_type].reliability;
       
   384 	InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
       
   385 
       
   386 	MaybeRenewVehicle(v, EstimateShipCost(v->engine_type));
       
   387 
       
   388 	if ((v->next_order&OT_MASK) == OT_GOTO_DEPOT) {
       
   389 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
       
   390 	
       
   391 		t = v->next_order;
       
   392 		v->next_order = OT_DUMMY;
       
   393 
       
   394 		if (t&OF_UNLOAD) { v->cur_order_index++; }
       
   395 
       
   396 		else if (t & 0x40) {
       
   397 			v->vehstatus |= VS_STOPPED;
       
   398 			if (v->owner == _local_player) {
       
   399 				SET_DPARAM16(0, v->unitnumber);
       
   400 				AddNewsItem(
       
   401 					STR_981C_SHIP_IS_WAITING_IN_DEPOT,
       
   402 					NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0),
       
   403 					v->index,
       
   404 					0);
       
   405 			}
       
   406 		}
       
   407 	}
       
   408 }
       
   409 
       
   410 static void ShipArrivesAt(Vehicle *v, Station *st)
       
   411 {
       
   412 	/* Check if station was ever visited before */
       
   413 	if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
       
   414 		uint32 flags;
       
   415 		st->had_vehicle_of_type |= HVOT_SHIP;
       
   416 		SET_DPARAM16(0, st->index);
       
   417 		flags = (v->owner == _local_player) ? NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_VEHICLE, NT_ARRIVAL_PLAYER, 0) : NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_VEHICLE, NT_ARRIVAL_OTHER, 0);
       
   418 		AddNewsItem(
       
   419 			STR_9833_CITIZENS_CELEBRATE_FIRST,
       
   420 			flags,
       
   421 			v->index,
       
   422 			0);
       
   423 	}
       
   424 }
       
   425 
       
   426 typedef struct {
       
   427 	uint skiptile;
       
   428 	uint dest_coords;
       
   429 	uint best_bird_dist;
       
   430 	uint best_length;
       
   431 } PathFindShip;
       
   432 
       
   433 //extern void dbg_store_path();
       
   434 
       
   435 static bool ShipTrackFollower(uint tile, PathFindShip *pfs, int track, uint length, byte *state)
       
   436 {
       
   437 	// Found dest?
       
   438 	if (tile == pfs->dest_coords) {
       
   439 		pfs->best_bird_dist = 0;
       
   440 		
       
   441 //		if (length < pfs->best_length)
       
   442 //			dbg_store_path();
       
   443 
       
   444 		pfs->best_length = minu(pfs->best_length, length);
       
   445 		return true;
       
   446 	}
       
   447 
       
   448 	// Skip this tile in the calculation
       
   449 	if (tile != pfs->skiptile) {
       
   450 		pfs->best_bird_dist = minu(pfs->best_bird_dist, GetTileDist1Db(pfs->dest_coords, tile));
       
   451 	}
       
   452 	
       
   453 	return false;
       
   454 }
       
   455 
       
   456 static const byte _ship_search_directions[6][4] = {
       
   457 	{ 0, 9, 2, 9 },
       
   458 	{ 9, 1, 9, 3 },
       
   459 	{ 9, 0, 3, 9 },
       
   460 	{ 1, 9, 9, 2 },
       
   461 	{ 3, 2, 9, 9 },
       
   462 	{ 9, 9, 1, 0 },
       
   463 };
       
   464 
       
   465 static const byte _pick_shiptrack_table[6] = {1, 3, 2, 2, 0, 0};
       
   466 
       
   467 static uint FindShipTrack(Vehicle *v, uint tile, int dir, uint bits, uint skiptile, int *track)
       
   468 {
       
   469 	PathFindShip pfs;
       
   470 	int i, best_track;
       
   471 	uint best_bird_dist = 0;
       
   472 	uint best_length    = 0;
       
   473 	uint r;
       
   474 	byte ship_dir = v->direction & 3;
       
   475 
       
   476 	pfs.dest_coords = v->dest_tile;
       
   477 	pfs.skiptile = skiptile;
       
   478 
       
   479 	best_track = -1;
       
   480 
       
   481 	do {
       
   482 		i = FIND_FIRST_BIT(bits);
       
   483 		bits = KILL_FIRST_BIT(bits);
       
   484 		
       
   485 		pfs.best_bird_dist = (uint)-1;
       
   486 		pfs.best_length = (uint)-1;
       
   487 
       
   488 		FollowTrack(tile, 0x3804, _ship_search_directions[i][dir], (TPFEnumProc*)ShipTrackFollower, NULL, &pfs);
       
   489 		
       
   490 		if (best_track >= 0) {
       
   491 			if (pfs.best_bird_dist != 0) {
       
   492 				/* neither reached the destination, pick the one with the smallest bird dist */
       
   493 				if (pfs.best_bird_dist > best_bird_dist) goto bad;
       
   494 				if (pfs.best_bird_dist < best_bird_dist) goto good;
       
   495 			} else {
       
   496 				if (pfs.best_length > best_length) goto bad;
       
   497 				if (pfs.best_length < best_length) goto good;
       
   498 			}
       
   499 			
       
   500 			/* if we reach this position, there's two paths of equal value so far. 
       
   501 			 * pick one randomly. */
       
   502 			r = (byte)Random();
       
   503 			if (_pick_shiptrack_table[i] == ship_dir) r += 80;
       
   504 			if (_pick_shiptrack_table[best_track] == ship_dir) r -= 80;
       
   505 			if (r <= 127) goto bad;
       
   506 		}
       
   507 good:;
       
   508 		best_track = i;
       
   509 		best_bird_dist = pfs.best_bird_dist;
       
   510 		best_length = pfs.best_length;
       
   511 bad:;
       
   512 
       
   513 	} while (bits != 0);
       
   514 
       
   515 	*track = best_track;
       
   516 	return best_bird_dist;
       
   517 }
       
   518 
       
   519 static int ChooseShipTrack(Vehicle *v, uint tile, int dir, uint tracks)
       
   520 {
       
   521 	uint b;
       
   522 	uint tot_dist, dist;
       
   523 	int track;
       
   524 	uint tile2;
       
   525 
       
   526 	assert(dir>=0 && dir<=3);
       
   527 	tile2 = TILE_ADD(tile, -_tileoffs_by_dir[dir]);
       
   528 	dir ^= 2;
       
   529 	tot_dist = (uint)-1;
       
   530 	b = GetTileShipTrackStatus(tile2) & _ship_sometracks[dir] & v->u.ship.state;
       
   531 	if (b != 0) {
       
   532 		dist = FindShipTrack(v, tile2, dir, b, tile, &track);
       
   533 		if (dist != (uint)-1)
       
   534 			tot_dist = dist + 1;
       
   535 	}
       
   536 	dist = FindShipTrack(v, tile, dir^2, tracks, 0, &track);
       
   537 	if (dist > tot_dist)
       
   538 		return -1;
       
   539 	return track;
       
   540 }
       
   541 
       
   542 static const byte _new_vehicle_direction_table[11] = {
       
   543 	0, 7, 6, 0,
       
   544 	1, 0, 5, 0,
       
   545 	2, 3, 4,
       
   546 };
       
   547 
       
   548 static int ShipGetNewDirectionFromTiles(uint new_tile, uint old_tile)
       
   549 {
       
   550 	uint offs = (GET_TILE_Y(new_tile) - GET_TILE_Y(old_tile) + 1) * 4 + 
       
   551 							GET_TILE_X(new_tile) - GET_TILE_X(old_tile) + 1;
       
   552 	assert(offs < 11 && offs != 3 && offs != 7);
       
   553 	return _new_vehicle_direction_table[offs];
       
   554 }
       
   555 
       
   556 static int ShipGetNewDirection(Vehicle *v, int x, int y)
       
   557 {
       
   558 	uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
       
   559 	assert(offs < 11 && offs != 3 && offs != 7);
       
   560 	return _new_vehicle_direction_table[offs];
       
   561 }
       
   562 
       
   563 static int GetAvailShipTracks(uint tile, int dir)
       
   564 {
       
   565 	uint32 r = GetTileTrackStatus(tile, 4);
       
   566 	return (byte) ((r | r >> 8)) & _ship_sometracks[dir];
       
   567 }
       
   568 
       
   569 static const byte _ship_subcoord[4][6][3] = {
       
   570 	{
       
   571 		{15, 8, 1},
       
   572 		{ 0, 0, 0},
       
   573 		{ 0, 0, 0},
       
   574 		{15, 8, 2},
       
   575 		{15, 7, 0},
       
   576 		{ 0, 0, 0},
       
   577 	},
       
   578 	{
       
   579 		{ 0, 0, 0},
       
   580 		{ 8, 0, 3},
       
   581 		{ 7, 0, 2},
       
   582 		{ 0, 0, 0},
       
   583 		{ 8, 0, 4},
       
   584 		{ 0, 0, 0},
       
   585 	},
       
   586 	{
       
   587 		{ 0, 8, 5},
       
   588 		{ 0, 0, 0},
       
   589 		{ 0, 7, 6},
       
   590 		{ 0, 0, 0},
       
   591 		{ 0, 0, 0},
       
   592 		{ 0, 8, 4},
       
   593 	},
       
   594 	{
       
   595 		{ 0, 0, 0},
       
   596 		{ 8,15, 7},
       
   597 		{ 0, 0, 0},
       
   598 		{ 8,15, 6},
       
   599 		{ 0, 0, 0},
       
   600 		{ 7,15, 0},
       
   601 	}
       
   602 };
       
   603 
       
   604 
       
   605 static void ShipController(Vehicle *v)
       
   606 {
       
   607 	GetNewVehiclePosResult gp;
       
   608 	uint32 r;
       
   609 	const byte *b;
       
   610 	int dir,track,tracks;
       
   611 
       
   612 	v->tick_counter++;
       
   613 
       
   614 	if (v->breakdown_ctr != 0) {
       
   615 		if (v->breakdown_ctr <= 2) {
       
   616 			HandleBrokenShip(v);
       
   617 			return;
       
   618 		}
       
   619 		v->breakdown_ctr--;
       
   620 	}
       
   621 
       
   622 	if (v->vehstatus & VS_STOPPED)
       
   623 		return;
       
   624 
       
   625 	ProcessShipOrder(v);
       
   626 	HandleShipLoading(v);
       
   627 
       
   628 	if ((v->next_order & OT_MASK) == OT_LOADING)
       
   629 		return;
       
   630 
       
   631 	CheckShipLeaveDepot(v);
       
   632 
       
   633 	if (!ShipAccelerate(v))
       
   634 		return;
       
   635 
       
   636 	BeginVehicleMove(v);
       
   637 
       
   638 	if (GetNewVehiclePos(v, &gp)) {
       
   639 		// staying in tile
       
   640 		if (v->u.ship.state == 0x80) {
       
   641 			gp.x = v->x_pos;
       
   642 			gp.y = v->y_pos;
       
   643 		} else {
       
   644 			/* isnot inside depot */
       
   645 			r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
       
   646 			if (r & 0x8) goto reverse_direction;
       
   647 
       
   648 			if (v->dest_tile != 0 && v->dest_tile == gp.new_tile) {
       
   649 				if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT) {
       
   650 					if ((gp.x&0xF)==8 && (gp.y&0xF)==8) {
       
   651 						ShipEnterDepot(v);
       
   652 						return;
       
   653 					}
       
   654 				} else if ((v->next_order & OT_MASK) == OT_GOTO_STATION) {
       
   655 					Station *st;
       
   656 
       
   657 					v->last_station_visited = v->next_order_param;
       
   658 
       
   659 					st = DEREF_STATION(v->next_order_param);
       
   660 					if (!(st->had_vehicle_of_type & HVOT_BUOY)) {
       
   661 						v->next_order = (v->next_order & (OF_FULL_LOAD|OF_UNLOAD)) | OF_NON_STOP | OT_LOADING;
       
   662 						ShipArrivesAt(v, st);
       
   663 
       
   664 						SET_EXPENSES_TYPE(EXPENSES_SHIP_INC);
       
   665 						if (LoadUnloadVehicle(v)) {
       
   666 							InvalidateWindow(WC_SHIPS_LIST, v->owner);
       
   667 							MarkShipDirty(v);
       
   668 						}
       
   669 						InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
       
   670 					} else {
       
   671 						v->next_order = OT_LEAVESTATION;
       
   672 						v->cur_order_index++;
       
   673 						InvalidateVehicleOrderWidget(v);
       
   674 					}
       
   675 					goto else_end;
       
   676 				}
       
   677 			}
       
   678 
       
   679 			if (v->next_order == OT_LEAVESTATION) {
       
   680 				v->next_order = OT_NOTHING;
       
   681 				InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
       
   682 			}
       
   683 		}
       
   684 	} else {
       
   685 		// new tile
       
   686 		if (GET_TILE_X(gp.new_tile) == 0xFF ||
       
   687 				(byte)GET_TILE_Y(gp.new_tile) == 0xFF)
       
   688 					goto reverse_direction;
       
   689 
       
   690 		dir = ShipGetNewDirectionFromTiles(gp.new_tile, gp.old_tile);
       
   691 		assert(dir == 1 || dir == 3 || dir == 5 || dir == 7);
       
   692 		dir>>=1;
       
   693 		tracks = GetAvailShipTracks(gp.new_tile, dir);
       
   694 		if (tracks == 0)
       
   695 			goto reverse_direction;
       
   696 
       
   697 		// Choose a direction, and continue if we find one
       
   698 		track = ChooseShipTrack(v, gp.new_tile, dir, tracks);
       
   699 		if (track < 0)
       
   700 			goto reverse_direction;
       
   701 
       
   702 		b = _ship_subcoord[dir][track];
       
   703 	
       
   704 		gp.x = (gp.x&~0xF) | b[0];
       
   705 		gp.y = (gp.y&~0xF) | b[1];
       
   706 
       
   707 		/* Call the landscape function and tell it that the vehicle entered the tile */
       
   708 		r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
       
   709 		if (r&0x8) goto reverse_direction;
       
   710 
       
   711 		if (!(r&0x4)) {
       
   712 			v->tile = gp.new_tile;
       
   713 			v->u.ship.state = 1 << track;
       
   714 		}
       
   715 
       
   716 		v->direction = b[2];
       
   717 	}
       
   718 else_end:;
       
   719 
       
   720 	/* update image of ship, as well as delta XY */
       
   721 	dir = ShipGetNewDirection(v, gp.x, gp.y);
       
   722 	v->x_pos = gp.x;
       
   723 	v->y_pos = gp.y;
       
   724 	v->z_pos = GetSlopeZ(gp.x, gp.y);
       
   725 
       
   726 getout:
       
   727 	UpdateShipDeltaXY(v, dir);
       
   728 	v->cur_image = GetShipImage(v, dir);
       
   729 	VehiclePositionChanged(v);
       
   730 	EndVehicleMove(v);
       
   731 	return;
       
   732 
       
   733 reverse_direction:
       
   734 	dir = v->direction ^ 4;
       
   735 	v->direction = dir;
       
   736 	goto getout;
       
   737 }
       
   738 
       
   739 static void AgeShipCargo(Vehicle *v)
       
   740 {
       
   741 	if (_age_cargo_skip_counter != 0)
       
   742 		return;
       
   743 	if (v->cargo_days != 255)
       
   744 		v->cargo_days++;
       
   745 }
       
   746 
       
   747 void Ship_Tick(Vehicle *v)
       
   748 {
       
   749 	AgeShipCargo(v);
       
   750 	ShipController(v);
       
   751 }
       
   752 
       
   753 void OnTick_Ship()
       
   754 {
       
   755 	// unused
       
   756 }
       
   757 
       
   758 
       
   759 void HandleClickOnShip(Vehicle *v)
       
   760 {
       
   761 	ShowShipViewWindow(v);
       
   762 }
       
   763 
       
   764 void ShipsYearlyLoop()
       
   765 {
       
   766 	Vehicle *v;
       
   767 
       
   768 	FOR_ALL_VEHICLES(v) {
       
   769 		if (v->type == VEH_Ship) {
       
   770 			v->profit_last_year = v->profit_this_year;
       
   771 			v->profit_this_year = 0;
       
   772 			InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
       
   773 		}
       
   774 	}
       
   775 }
       
   776 
       
   777 static int32 EstimateShipCost(uint16 engine_type)
       
   778 {
       
   779 	return ship_vehicle_info(engine_type).base_cost * (_price.ship_base>>3)>>5;
       
   780 }
       
   781 
       
   782 // p1 = type to build
       
   783 int32 CmdBuildShip(int x, int y, uint32 flags, uint32 p1, uint32 p2)
       
   784 {
       
   785 	int32 value;
       
   786 	Vehicle *v;
       
   787 	uint unit_num;
       
   788 	uint tile = TILE_FROM_XY(x,y);
       
   789 	Engine *e;
       
   790 	
       
   791 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
       
   792 
       
   793 	value = EstimateShipCost(p1);
       
   794 	if (flags & DC_QUERY_COST)
       
   795 		return value;
       
   796 
       
   797 	v = AllocateVehicle();
       
   798 	if (v == NULL || _ptr_to_next_order >= endof(_order_array) || 
       
   799 			(unit_num = GetFreeUnitNumber(VEH_Ship)) > _patches.max_ships)
       
   800 		return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME);
       
   801 	
       
   802 	if (flags & DC_EXEC) {
       
   803 		v->unitnumber = unit_num;
       
   804 
       
   805 		v->owner = _current_player;
       
   806 		v->tile = tile;
       
   807 		x = GET_TILE_X(tile)*16 + 8;
       
   808 		y = GET_TILE_Y(tile)*16 + 8;
       
   809 		v->x_pos = x;
       
   810 		v->y_pos = y;
       
   811 		v->z_pos = GetSlopeZ(x,y);
       
   812 
       
   813 		v->z_height = 6;
       
   814 		v->sprite_width = 6;
       
   815 		v->sprite_height = 6;
       
   816 		v->x_offs = -3;
       
   817 		v->y_offs = -3;
       
   818 		v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
       
   819 		
       
   820 		v->spritenum = ship_vehicle_info(p1).image_index;
       
   821 		v->cargo_type = ship_vehicle_info(p1).cargo_type;
       
   822 		v->cargo_cap = ship_vehicle_info(p1).capacity;
       
   823 		v->value = value;
       
   824 		
       
   825 		v->last_station_visited = 255;
       
   826 		v->max_speed = ship_vehicle_info(p1).max_speed;
       
   827 		v->engine_type = (byte)p1;
       
   828 
       
   829 		e = &_engines[p1];
       
   830 		v->reliability = e->reliability;
       
   831 		v->reliability_spd_dec = e->reliability_spd_dec;
       
   832 		v->max_age = e->lifelength * 366;
       
   833 		_new_ship_id = v->index;
       
   834 
       
   835 		v->string_id = STR_SV_SHIP_NAME;
       
   836 		v->u.ship.state = 0x80;
       
   837 		*(v->schedule_ptr = _ptr_to_next_order++) = 0;
       
   838 
       
   839 		v->service_interval = _patches.servint_ships;
       
   840 		v->date_of_last_service = _date;
       
   841 		v->build_year = _cur_year;
       
   842 		v->cur_image = 0x0E5E;
       
   843 		v->type = VEH_Ship;
       
   844 
       
   845 		VehiclePositionChanged(v);
       
   846 
       
   847 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
       
   848 		InvalidateWindow(WC_SHIPS_LIST, v->owner);
       
   849 		InvalidateWindow(WC_COMPANY, v->owner);
       
   850 	}
       
   851 	
       
   852 	return value;
       
   853 }
       
   854 
       
   855 int32 CmdSellShip(int x, int y, uint32 flags, uint32 p1, uint32 p2)
       
   856 {
       
   857 	Vehicle *v;
       
   858 
       
   859 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
       
   860 	
       
   861 	v = &_vehicles[p1];
       
   862 
       
   863 	if (!CheckOwnership(v->owner))
       
   864 		return CMD_ERROR;
       
   865 
       
   866 	if (!IsShipDepotTile(v->tile) || v->u.road.state != 0x80 || !(v->vehstatus&VS_STOPPED))
       
   867 		return_cmd_error(STR_980B_SHIP_MUST_BE_STOPPED_IN);
       
   868 	
       
   869 	if (flags & DC_EXEC) {
       
   870 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
       
   871 		InvalidateWindow(WC_SHIPS_LIST, v->owner);
       
   872 		InvalidateWindow(WC_COMPANY, v->owner);
       
   873 		DeleteWindowById(WC_VEHICLE_VIEW, v->index);
       
   874 		DeleteVehicle(v);
       
   875 	}
       
   876 	
       
   877 	return -(int32)v->value;
       
   878 }
       
   879 
       
   880 // p1 = vehicle
       
   881 int32 CmdStartStopShip(int x, int y, uint32 flags, uint32 p1, uint32 p2)
       
   882 {
       
   883 	Vehicle *v;
       
   884 
       
   885 	v = &_vehicles[p1];
       
   886 
       
   887 	if (!CheckOwnership(v->owner))
       
   888 		return CMD_ERROR;
       
   889 
       
   890 	if (flags & DC_EXEC) {
       
   891 		v->vehstatus ^= VS_STOPPED;
       
   892 		InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
       
   893 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
       
   894 	}
       
   895 
       
   896 	return 0;
       
   897 }
       
   898 
       
   899 int32 CmdSendShipToDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2)
       
   900 {
       
   901 	Vehicle *v;
       
   902 	int depot;
       
   903 
       
   904 	v = &_vehicles[p1];
       
   905 
       
   906 	if (!CheckOwnership(v->owner))
       
   907 		return CMD_ERROR;
       
   908 
       
   909 	if ((v->next_order&OT_MASK) == OT_GOTO_DEPOT) {
       
   910 		if (flags & DC_EXEC) {
       
   911 			if (v->next_order&OF_UNLOAD) {v->cur_order_index++;}
       
   912 			v->next_order = OT_DUMMY;
       
   913 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);			
       
   914 		}
       
   915 	} else {
       
   916 		depot = FindClosestShipDepot(v);
       
   917 		if (depot < 0)
       
   918 			return_cmd_error(STR_981A_UNABLE_TO_FIND_LOCAL_DEPOT);
       
   919 
       
   920 		if (flags & DC_EXEC) {
       
   921 			v->dest_tile = _depots[depot].xy;
       
   922 			v->next_order = OF_NON_STOP | OF_FULL_LOAD | OT_GOTO_DEPOT;
       
   923 			v->next_order_param = depot;
       
   924 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
       
   925 		}
       
   926 	}
       
   927 
       
   928 	return 0;
       
   929 }
       
   930 
       
   931 int32 CmdChangeShipServiceInt(int x, int y, uint32 flags, uint32 p1, uint32 p2)
       
   932 {
       
   933 	Vehicle *v;
       
   934 
       
   935 	v = &_vehicles[p1];
       
   936 
       
   937 	if (!CheckOwnership(v->owner))
       
   938 		return CMD_ERROR;
       
   939 
       
   940 	if (flags & DC_EXEC) {
       
   941 		v->service_interval = (uint16)p2;
       
   942 		InvalidateWindowWidget(WC_VEHICLE_DETAILS, v->index, 7);
       
   943 	}
       
   944 
       
   945 	return 0;
       
   946 }
       
   947 
       
   948 
       
   949 // p1 = vehicle
       
   950 // p2 = new cargo
       
   951 int32 CmdRefitShip(int x, int y, uint32 flags, uint32 p1, uint32 p2)
       
   952 {
       
   953 	Vehicle *v;
       
   954 	int32 cost;
       
   955 
       
   956 	SET_EXPENSES_TYPE(EXPENSES_SHIP_RUN);
       
   957 	
       
   958 	v = &_vehicles[p1];
       
   959 	if (!CheckOwnership(v->owner))
       
   960 		return CMD_ERROR;
       
   961 
       
   962 	if (!IsShipDepotTile(v->tile) ||
       
   963 			!(v->vehstatus&VS_STOPPED) ||
       
   964 			v->u.ship.state != 0x80)
       
   965 		return_cmd_error(STR_980B_SHIP_MUST_BE_STOPPED_IN);
       
   966 
       
   967 	cost = 0;
       
   968 	if (IS_HUMAN_PLAYER(v->owner) && (byte)p2 != v->cargo_type) {
       
   969 		cost = _price.ship_base >> 7;
       
   970 	}
       
   971 
       
   972 	if (flags & DC_EXEC) {
       
   973 		v->cargo_count = 0;
       
   974 		v->cargo_type = (byte)p2;
       
   975 		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
       
   976 	}
       
   977 
       
   978 	return cost;
       
   979 
       
   980 }
       
   981 
       
   982