1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "map.h"

     4

#include "tile.h"

     5

#include "player.h"

     6

#include "vehicle.h"

     7

#include "engine.h"

     8

#include "command.h"

     9

#include "town.h"

    10

#include "industry.h"

    11

#include "station.h"

    12

#include "pathfind.h"

    13

#include "economy.h"

    14

#include "airport.h"

    15

#include "depot.h"

    16

    17

// remove some day perhaps?

    18

static Player *_cur_ai_player;

    19

static uint _ai_service_interval;

    20

    21

typedef void AiStateAction(Player *p);

    22

    23

enum {

    24

	AIS_0 = 0,

    25

	AIS_1 = 1,

    26

	AIS_VEH_LOOP = 2,

    27

	AIS_VEH_CHECK_REPLACE_VEHICLE = 3,

    28

	AIS_VEH_DO_REPLACE_VEHICLE = 4,

    29

	AIS_WANT_NEW_ROUTE = 5,

    30

	AIS_BUILD_DEFAULT_RAIL_BLOCKS = 6,

    31

	AIS_BUILD_RAIL = 7,

    32

	AIS_BUILD_RAIL_VEH = 8,

    33

	AIS_DELETE_RAIL_BLOCKS = 9,

    34

	AIS_BUILD_DEFAULT_ROAD_BLOCKS = 10,

    35

	AIS_BUILD_ROAD = 11,

    36

	AIS_BUILD_ROAD_VEHICLES = 12,

    37

	AIS_DELETE_ROAD_BLOCKS = 13,

    38

	AIS_AIRPORT_STUFF = 14,

    39

	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,

    40

	AIS_BUILD_AIRCRAFT_VEHICLES = 16,

    41

	AIS_CHECK_SHIP_STUFF = 17,

    42

	AIS_BUILD_DEFAULT_SHIP_BLOCKS = 18,

    43

	AIS_DO_SHIP_STUFF = 19,

    44

	AIS_SELL_VEHICLE = 20,

    45

	AIS_REMOVE_STATION = 21,

    46

	AIS_REMOVE_TRACK = 22,

    47

	AIS_REMOVE_SINGLE_RAIL_TILE = 23

    48

};

    49

    50

    51

#include "table/ai_rail.h"

    52

    53

static byte GetRailTrackStatus(TileIndex tile) {

    54

	uint32 r = GetTileTrackStatus(tile, TRANSPORT_RAIL);

    55

	return (byte) (r | r >> 8);

    56

}

    57

    58

    59

static void AiCase0(Player *p)

    60

{

    61

	p->ai.state = AIS_REMOVE_TRACK;

    62

	p->ai.state_counter = 0;

    63

}

    64

    65

static void AiCase1(Player *p)

    66

{

    67

	p->ai.cur_veh = NULL;

    68

	p->ai.state = AIS_VEH_LOOP;

    69

}

    70

    71

static void AiStateVehLoop(Player *p)

    72

{

    73

	Vehicle *v;

    74

	uint index;

    75

    76

	index = (p->ai.cur_veh == NULL) ? 0 : p->ai.cur_veh->index + 1;

    77

    78

	FOR_ALL_VEHICLES_FROM(v, index) {

    79

		if (v->type == 0 || v->owner != _current_player)

    80

			continue;

    81

    82

		if ((v->type == VEH_Train && v->subtype==0) ||

    83

				v->type == VEH_Road ||

    84

				(v->type == VEH_Aircraft && v->subtype <= 2) ||

    85

				v->type == VEH_Ship) {

    86

    87

			/* replace engine? */

    88

			if (v->type == VEH_Train && v->engine_type < 3 &&

    89

					(_price.build_railvehicle >> 3) < p->player_money) {

    90

				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;

    91

				p->ai.cur_veh = v;

    92

				return;

    93

			}

    94

    95

			/* not profitable? */

    96

			if (v->age >= 730 &&

    97

					v->profit_last_year < _price.station_value*5 &&

    98

					v->profit_this_year < _price.station_value*5) {

    99

				p->ai.state_counter = 0;

   100

				p->ai.state = AIS_SELL_VEHICLE;

   101

				p->ai.cur_veh = v;

   102

				return;

   103

			}

   104

   105

			/* not reliable? */

   106

			if ((v->age != 0 &&

   107

					_engines[v->engine_type].reliability < 35389) ||

   108

					v->age >= v->max_age) {

   109

				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;

   110

				p->ai.cur_veh = v;

   111

				return;

   112

			}

   113

		}

   114

	}

   115

   116

	p->ai.state = AIS_WANT_NEW_ROUTE;

   117

	p->ai.state_counter = 0;

   118

}

   119

   120

static int AiChooseTrainToBuild(byte railtype, int32 money, byte flag, TileIndex tile)

   121

{

   122

	int best_veh_index = -1;

   123

	byte best_veh_score = 0;

   124

	int32 ret;

   125

	int i;

   126

   127

	for (i = 0; i < NUM_TRAIN_ENGINES; i++) {

   128

		const RailVehicleInfo *rvi = RailVehInfo(i);

   129

		Engine *e = DEREF_ENGINE(i);

   130

   131

		if (e->railtype != railtype || rvi->flags & RVI_WAGON

   132

		    || !HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)

   133

			continue;

   134

   135

		ret = DoCommandByTile(tile, i, 0, 0, CMD_BUILD_RAIL_VEHICLE);

   136

		if (!CmdFailed(ret) && (!(_cmd_build_rail_veh_var1&1) || !(flag&1)) && ret <= money &&

   137

				_cmd_build_rail_veh_score >= best_veh_score) {

   138

			best_veh_score = _cmd_build_rail_veh_score;

   139

			best_veh_index = i;

   140

		}

   141

	}

   142

   143

	return best_veh_index;

   144

}

   145

   146

static int AiChooseRoadVehToBuild(byte cargo, int32 money, TileIndex tile)

   147

{

   148

	int best_veh_index = -1;

   149

	int32 best_veh_cost = 0;

   150

	int32 ret;

   151

   152

	int i = _cargoc.ai_roadveh_start[cargo];

   153

	int end = i + _cargoc.ai_roadveh_count[cargo];

   154

	Engine *e = &_engines[i];

   155

	do {

   156

		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)

   157

			continue;

   158

   159

		ret = DoCommandByTile(tile, i, 0, 0, CMD_BUILD_ROAD_VEH);

   160

		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {

   161

			best_veh_cost = ret;

   162

			best_veh_index = i;

   163

		}

   164

	} while (++e, ++i != end);

   165

   166

	return best_veh_index;

   167

}

   168

   169

static int AiChooseAircraftToBuild(int32 money, byte flag)

   170

{

   171

	int best_veh_index = -1;

   172

	int32 best_veh_cost = 0;

   173

	int32 ret;

   174

   175

	int i = AIRCRAFT_ENGINES_INDEX;

   176

	int end = i + NUM_AIRCRAFT_ENGINES;

   177

	Engine *e = &_engines[i];

   178

	do {

   179

		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)

   180

			continue;

   181

   182

		if (flag&1) {

   183

			if (i<253) continue;

   184

		} else {

   185

			if (i>=253) continue;

   186

		}

   187

   188

		ret = DoCommandByTile(0, i, 0, 0, CMD_BUILD_AIRCRAFT);

   189

		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {

   190

			best_veh_cost = ret;

   191

			best_veh_index = i;

   192

		}

   193

	} while (++e, ++i != end);

   194

   195

	return best_veh_index;

   196

}

   197

   198

static int32 AiGetBasePrice(Player *p)

   199

{

   200

	int32 base = _price.station_value;

   201

   202

	// adjust base price when more expensive vehicles are available

   203

	if (p->ai.railtype_to_use == 1) base = (base * 3) >> 1;

   204

	else if (p->ai.railtype_to_use == 2) base *= 2;

   205

   206

	return base;

   207

}

   208

   209

#if 0

   210

static int AiChooseShipToBuild(byte cargo, int32 money)

   211

{

   212

	// XXX: not done

   213

	return 0;

   214

}

   215

#endif

   216

   217

static int AiChooseRoadVehToReplaceWith(Player *p, Vehicle *v)

   218

{

   219

	int32 avail_money = p->player_money + v->value;

   220

	return AiChooseRoadVehToBuild(v->cargo_type, avail_money, v->tile);

   221

}

   222

   223

static int AiChooseAircraftToReplaceWith(Player *p, Vehicle *v)

   224

{

   225

	int32 avail_money = p->player_money + v->value;

   226

	return AiChooseAircraftToBuild(avail_money, v->engine_type>=253?1:0);

   227

}

   228

   229

static int AiChooseTrainToReplaceWith(Player *p, Vehicle *v)

   230

{

   231

	int32 avail_money = p->player_money + v->value;

   232

	int num=0;

   233

	Vehicle *u = v;

   234

   235

	while (++num, u->next != NULL) {

   236

		u = u->next;

   237

	}

   238

   239

	// XXX: check if a wagon

   240

	return AiChooseTrainToBuild(v->u.rail.railtype, avail_money, 0, v->tile);

   241

}

   242

   243

static int AiChooseShipToReplaceWith(Player *p, Vehicle *v)

   244

{

   245

	error("!AiChooseShipToReplaceWith");

   246

   247

	/* maybe useless, but avoids compiler warning this way */

   248

	return 0;

   249

}

   250

   251

static void AiHandleGotoDepot(Player *p, int cmd)

   252

{

   253

	if (p->ai.cur_veh->current_order.type != OT_GOTO_DEPOT)

   254

		DoCommandByTile(0, p->ai.cur_veh->index, 0, DC_EXEC, cmd);

   255

   256

	if (++p->ai.state_counter <= 1387) {

   257

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   258

		return;

   259

	}

   260

   261

	if (p->ai.cur_veh->current_order.type == OT_GOTO_DEPOT) {

   262

		p->ai.cur_veh->current_order.type = OT_DUMMY;

   263

		p->ai.cur_veh->current_order.flags = 0;

   264

		InvalidateWindow(WC_VEHICLE_VIEW, p->ai.cur_veh->index);

   265

	}

   266

}

   267

   268

static void AiRestoreVehicleOrders(Vehicle *v, BackuppedOrders *bak)

   269

{

   270

	int i;

   271

   272

	for (i = 0; bak->order[i].type != OT_NOTHING; i++)

   273

		if (CmdFailed(DoCommandP(0, v->index + (i << 16), PackOrder(&bak->order[i]), NULL, CMD_INSERT_ORDER | CMD_NO_TEST_IF_IN_NETWORK)))

   274

			break;

   275

}

   276

   277

static void AiHandleReplaceTrain(Player *p)

   278

{

   279

	Vehicle *v = p->ai.cur_veh;

   280

	BackuppedOrders orderbak[1];

   281

	int veh;

   282

	uint tile;

   283

   284

	// wait until the vehicle reaches the depot.

   285

	if (!IsTileDepotType(v->tile, TRANSPORT_RAIL) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {

   286

		AiHandleGotoDepot(p, CMD_TRAIN_GOTO_DEPOT);

   287

		return;

   288

	}

   289

   290

	veh = AiChooseTrainToReplaceWith(p, v);

   291

	if (veh != -1) {

   292

		BackupVehicleOrders(v, orderbak);

   293

		tile = v->tile;

   294

   295

		if (!CmdFailed(DoCommandByTile(0, v->index, 2, DC_EXEC, CMD_SELL_RAIL_WAGON)) &&

   296

			  !CmdFailed(DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE)) ) {

   297

			veh = _new_train_id;

   298

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   299

			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_TRAIN);

   300

   301

			DoCommandByTile(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_TRAIN_SERVICE_INT);

   302

		}

   303

	}

   304

}

   305

   306

static void AiHandleReplaceRoadVeh(Player *p)

   307

{

   308

	Vehicle *v = p->ai.cur_veh;

   309

	BackuppedOrders orderbak[1];

   310

	int veh;

   311

	uint tile;

   312

   313

	if (!IsTileDepotType(v->tile, TRANSPORT_ROAD) || v->u.road.state != 254 || !(v->vehstatus&VS_STOPPED)) {

   314

		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);

   315

		return;

   316

	}

   317

   318

	veh = AiChooseRoadVehToReplaceWith(p, v);

   319

	if (veh != -1) {

   320

		BackupVehicleOrders(v, orderbak);

   321

		tile = v->tile;

   322

   323

		if (!CmdFailed(DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH)) &&

   324

			  !CmdFailed(DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH)) ) {

   325

			veh = _new_roadveh_id;

   326

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   327

			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_ROADVEH);

   328

   329

			DoCommandByTile(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_TRAIN_SERVICE_INT);

   330

		}

   331

	}

   332

}

   333

   334

static void AiHandleReplaceAircraft(Player *p)

   335

{

   336

	Vehicle *v = p->ai.cur_veh;

   337

	int veh;

   338

	BackuppedOrders orderbak[1];

   339

	uint tile;

   340

   341

	if (!IsAircraftHangarTile(v->tile) && !(v->vehstatus&VS_STOPPED)) {

   342

		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);

   343

		return;

   344

	}

   345

   346

	veh = AiChooseAircraftToReplaceWith(p, v);

   347

	if (veh != -1) {

   348

		BackupVehicleOrders(v, orderbak);

   349

		tile = v->tile;

   350

   351

		if (!CmdFailed(DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT)) &&

   352

			  !CmdFailed(DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT)) ) {

   353

			veh = _new_aircraft_id;

   354

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   355

			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);

   356

   357

			DoCommandByTile(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_TRAIN_SERVICE_INT);

   358

		}

   359

	}

   360

}

   361

   362

static void AiHandleReplaceShip(Player *p)

   363

{

   364

	error("!AiHandleReplaceShip");

   365

}

   366

   367

typedef int CheckReplaceProc(Player *p, Vehicle *v);

   368

   369

static CheckReplaceProc * const _veh_check_replace_proc[] = {

   370

	AiChooseTrainToReplaceWith,

   371

	AiChooseRoadVehToReplaceWith,

   372

	AiChooseShipToReplaceWith,

   373

	AiChooseAircraftToReplaceWith,

   374

};

   375

   376

typedef void DoReplaceProc(Player *p);

   377

static DoReplaceProc * const _veh_do_replace_proc[] = {

   378

	AiHandleReplaceTrain,

   379

	AiHandleReplaceRoadVeh,

   380

	AiHandleReplaceShip,

   381

	AiHandleReplaceAircraft

   382

};

   383

   384

static void AiStateCheckReplaceVehicle(Player *p)

   385

{

   386

	Vehicle *v = p->ai.cur_veh;

   387

   388

	if (v->type == 0 || v->owner != _current_player || v->type > VEH_Ship || _veh_check_replace_proc[v->type - VEH_Train](p, v) == -1) {

   389

		p->ai.state = AIS_VEH_LOOP;

   390

	} else {

   391

		p->ai.state_counter = 0;

   392

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   393

	}

   394

}

   395

   396

static void AiStateDoReplaceVehicle(Player *p)

   397

{

   398

	Vehicle *v = p->ai.cur_veh;

   399

	p->ai.state = AIS_VEH_LOOP;

   400

	// vehicle is not owned by the player anymore, something went very wrong.

   401

	if (v->type == 0 || v->owner != _current_player)

   402

		return;

   403

	_veh_do_replace_proc[v->type - VEH_Train](p);

   404

}

   405

   406

typedef struct FoundRoute {

   407

	int distance;

   408

	byte cargo;

   409

	void *from;

   410

	void *to;

   411

} FoundRoute;

   412

   413

static Town *AiFindRandomTown(void)

   414

{

   415

	Town *t = GetTown(RandomRange(_total_towns));

   416

	return (t->xy != 0) ? t : NULL;

   417

}

   418

   419

static Industry *AiFindRandomIndustry(void)

   420

{

   421

	Industry *i = GetIndustry(RandomRange(_total_industries));

   422

	return (i->xy != 0) ? i : NULL;

   423

}

   424

   425

static void AiFindSubsidyIndustryRoute(FoundRoute *fr)

   426

{

   427

	uint i;

   428

	byte cargo;

   429

	Subsidy *s;

   430

	Industry *from, *to_ind;

   431

	Town *to_tow;

   432

	TileIndex to_xy;

   433

   434

	// initially error

   435

	fr->distance = -1;

   436

   437

	// Randomize subsidy index..

   438

	i = RandomRange(lengthof(_subsidies) * 3);

   439

	if (i >= lengthof(_subsidies))

   440

		return;

   441

   442

	s = &_subsidies[i];

   443

   444

	// Don't want passengers or mail

   445

	cargo = s->cargo_type;

   446

	if (cargo == 0xFF || cargo == CT_PASSENGERS || cargo == CT_MAIL || s->age > 7)

   447

		return;

   448

	fr->cargo = cargo;

   449

   450

	fr->from = from = GetIndustry(s->from);

   451

   452

	if (cargo == CT_GOODS || cargo == CT_FOOD) {

   453

		to_tow = GetTown(s->to);

   454

		if (to_tow->population < (uint32)(cargo == CT_FOOD ? 200 : 900))

   455

			return; // error

   456

		fr->to = to_tow;

   457

		to_xy = to_tow->xy;

   458

	} else {

   459

		to_ind = GetIndustry(s->to);

   460

		fr->to = to_ind;

   461

		to_xy = to_ind->xy;

   462

	}

   463

   464

	fr->distance = DistanceManhattan(from->xy, to_xy);

   465

}

   466

   467

static void AiFindSubsidyPassengerRoute(FoundRoute *fr)

   468

{

   469

	uint i;

   470

	Subsidy *s;

   471

	Town *from,*to;

   472

   473

	// initially error

   474

	fr->distance = -1;

   475

   476

	// Randomize subsidy index..

   477

	i = RandomRange(lengthof(_subsidies) * 3);

   478

	if (i >= lengthof(_subsidies))

   479

		return;

   480

   481

	s = &_subsidies[i];

   482

   483

	// Only want passengers

   484

	if (s->cargo_type != CT_PASSENGERS || s->age > 7)

   485

		return;

   486

	fr->cargo = s->cargo_type;

   487

   488

	fr->from = from = GetTown(s->from);

   489

	fr->to = to = GetTown(s->to);

   490

   491

	// They must be big enough

   492

	if (from->population < 400 || to->population < 400)

   493

		return;

   494

   495

	fr->distance = DistanceManhattan(from->xy, to->xy);

   496

}

   497

   498

static void AiFindRandomIndustryRoute(FoundRoute *fr)

   499

{

   500

	Industry *i,*i2;

   501

	Town *t;

   502

	uint32 r;

   503

	byte cargo;

   504

   505

	// initially error

   506

	fr->distance = -1;

   507

   508

	r = Random();

   509

   510

	// pick a source

   511

	fr->from = i = AiFindRandomIndustry();

   512

	if (i == NULL)

   513

		return;

   514

   515

	// pick a random produced cargo

   516

	cargo = i->produced_cargo[0];

   517

	if (r&1 && i->produced_cargo[1] != 0xFF)

   518