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 r;

   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

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

   136

		if (r != CMD_ERROR &&

   137

					(!(_cmd_build_rail_veh_var1&1) || !(flag&1)) &&

   138

					r <= money &&

   139

				_cmd_build_rail_veh_score >= best_veh_score) {

   140

			best_veh_score = _cmd_build_rail_veh_score;

   141

			best_veh_index = i;

   142

		}

   143

	}

   144

   145

	return best_veh_index;

   146

}

   147

   148

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

   149

{

   150

	int best_veh_index = -1;

   151

	int32 best_veh_cost = 0;

   152

	int32 r;

   153

   154

	int i = _cargoc.ai_roadveh_start[cargo];

   155

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

   156

	Engine *e = &_engines[i];

   157

	do {

   158

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

   159

			continue;

   160

   161

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

   162

		if (r != CMD_ERROR && r <= money && r >= best_veh_cost) {

   163

			best_veh_cost = r;

   164

			best_veh_index = i;

   165

		}

   166

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

   167

   168

	return best_veh_index;

   169

}

   170

   171

static int AiChooseAircraftToBuild(int32 money, byte flag)

   172

{

   173

	int best_veh_index = -1;

   174

	int32 best_veh_cost = 0;

   175

	int32 r;

   176

   177

	int i = AIRCRAFT_ENGINES_INDEX;

   178

	int end = i + NUM_AIRCRAFT_ENGINES;

   179

	Engine *e = &_engines[i];

   180

	do {

   181

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

   182

			continue;

   183

   184

		if (flag&1) {

   185

			if (i<253) continue;

   186

		} else {

   187

			if (i>=253) continue;

   188

		}

   189

   190

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

   191

		if (r != CMD_ERROR && r <= money && r >= best_veh_cost) {

   192

			best_veh_cost = r;

   193

			best_veh_index = i;

   194

		}

   195

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

   196

   197

	return best_veh_index;

   198

}

   199

   200

static int32 AiGetBasePrice(Player *p)

   201

{

   202

	int32 base = _price.station_value;

   203

   204

	// adjust base price when more expensive vehicles are available

   205

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

   206

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

   207

   208

	return base;

   209

}

   210

   211

#if 0

   212

static int AiChooseShipToBuild(byte cargo, int32 money)

   213

{

   214

	// XXX: not done

   215

	return 0;

   216

}

   217

#endif

   218

   219

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

   220

{

   221

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

   222

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

   223

}

   224

   225

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

   226

{

   227

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

   228

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

   229

}

   230

   231

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

   232

{

   233

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

   234

	int num=0;

   235

	Vehicle *u = v;

   236

   237

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

   238

		u = u->next;

   239

	}

   240

   241

	// XXX: check if a wagon

   242

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

   243

}

   244

   245

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

   246

{

   247

	error("!AiChooseShipToReplaceWith");

   248

   249

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

   250

	return 0;

   251

}

   252

   253

static void AiHandleGotoDepot(Player *p, int cmd)

   254

{

   255

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

   256

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

   257

   258

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

   259

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   260

		return;

   261

	}

   262

   263

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

   264

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

   265

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

   266

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

   267

	}

   268

}

   269

   270

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

   271

{

   272

	int i;

   273

   274

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

   275

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

   276

			break;

   277

}

   278

   279

static void AiHandleReplaceTrain(Player *p)

   280

{

   281

	Vehicle *v = p->ai.cur_veh;

   282

	BackuppedOrders orderbak[1];

   283

	int veh;

   284

	uint tile;

   285

   286

	// wait until the vehicle reaches the depot.

   287

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

   288

		AiHandleGotoDepot(p, CMD_TRAIN_GOTO_DEPOT);

   289

		return;

   290

	}

   291

   292

	veh = AiChooseTrainToReplaceWith(p, v);

   293

	if (veh != -1) {

   294

		BackupVehicleOrders(v, orderbak);

   295

		tile = v->tile;

   296

   297

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

   298

			 DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE) != CMD_ERROR) {

   299

			veh = _new_train_id;

   300

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   301

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

   302

   303

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

   304

		}

   305

	}

   306

}

   307

   308

static void AiHandleReplaceRoadVeh(Player *p)

   309

{

   310

	Vehicle *v = p->ai.cur_veh;

   311

	BackuppedOrders orderbak[1];

   312

	int veh;

   313

	uint tile;

   314

   315

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

   316

		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);

   317

		return;

   318

	}

   319

   320

	veh = AiChooseRoadVehToReplaceWith(p, v);

   321

	if (veh != -1) {

   322

		BackupVehicleOrders(v, orderbak);

   323

		tile = v->tile;

   324

   325

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

   326

			 DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH) != CMD_ERROR) {

   327

			veh = _new_roadveh_id;

   328

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   329

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

   330

   331

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

   332

		}

   333

	}

   334

}

   335

   336

static void AiHandleReplaceAircraft(Player *p)

   337

{

   338

	Vehicle *v = p->ai.cur_veh;

   339

	int veh;

   340

	BackuppedOrders orderbak[1];

   341

	uint tile;

   342

   343

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

   344

		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);

   345

		return;

   346

	}

   347

   348

	veh = AiChooseAircraftToReplaceWith(p, v);

   349

	if (veh != -1) {

   350

		BackupVehicleOrders(v, orderbak);

   351

		tile = v->tile;

   352

   353

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

   354

			 DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT) != CMD_ERROR) {

   355

			veh = _new_aircraft_id;

   356

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   357

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

   358

   359

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

   360

		}

   361

	}

   362

}

   363

   364

static void AiHandleReplaceShip(Player *p)

   365

{

   366

	error("!AiHandleReplaceShip");

   367

}

   368

   369

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

   370

   371

static CheckReplaceProc * const _veh_check_replace_proc[] = {

   372

	AiChooseTrainToReplaceWith,

   373

	AiChooseRoadVehToReplaceWith,

   374

	AiChooseShipToReplaceWith,

   375

	AiChooseAircraftToReplaceWith,

   376

};

   377

   378

typedef void DoReplaceProc(Player *p);

   379

static DoReplaceProc * const _veh_do_replace_proc[] = {

   380

	AiHandleReplaceTrain,

   381

	AiHandleReplaceRoadVeh,

   382

	AiHandleReplaceShip,

   383

	AiHandleReplaceAircraft

   384

};

   385

   386

static void AiStateCheckReplaceVehicle(Player *p)

   387

{

   388

	Vehicle *v = p->ai.cur_veh;

   389

   390

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

   391

		p->ai.state = AIS_VEH_LOOP;

   392

	} else {

   393

		p->ai.state_counter = 0;

   394

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   395

	}

   396

}

   397

   398

static void AiStateDoReplaceVehicle(Player *p)

   399

{

   400

	Vehicle *v = p->ai.cur_veh;

   401

	p->ai.state = AIS_VEH_LOOP;

   402

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

   403

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

   404

		return;

   405

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

   406

}

   407

   408

typedef struct FoundRoute {

   409

	int distance;

   410

	byte cargo;

   411

	void *from;

   412

	void *to;

   413

} FoundRoute;

   414

   415

static Town *AiFindRandomTown(void)

   416

{

   417

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

   418

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

   419

}

   420

   421

static Industry *AiFindRandomIndustry(void)

   422

{

   423

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

   424

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

   425

}

   426

   427

static void AiFindSubsidyIndustryRoute(FoundRoute *fr)

   428

{

   429

	uint i;

   430

	byte cargo;

   431

	Subsidy *s;

   432

	Industry *from, *to_ind;

   433

	Town *to_tow;

   434

	TileIndex to_xy;

   435

   436

	// initially error

   437

	fr->distance = -1;

   438

   439

	// Randomize subsidy index..

   440

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

   441

	if (i >= lengthof(_subsidies))

   442

		return;

   443

   444

	s = &_subsidies[i];

   445

   446

	// Don't want passengers or mail

   447

	cargo = s->cargo_type;

   448

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

   449

		return;

   450

	fr->cargo = cargo;

   451

   452

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

   453

   454

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

   455

		to_tow = GetTown(s->to);

   456

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

   457

			return; // error

   458

		fr->to = to_tow;

   459

		to_xy = to_tow->xy;

   460

	} else {

   461

		to_ind = GetIndustry(s->to);

   462

		fr->to = to_ind;

   463

		to_xy = to_ind->xy;

   464

	}

   465

   466

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

   467

}

   468

   469

static void AiFindSubsidyPassengerRoute(FoundRoute *fr)

   470

{

   471

	uint i;

   472

	Subsidy *s;

   473

	Town *from,*to;

   474

   475

	// initially error

   476

	fr->distance = -1;

   477

   478

	// Randomize subsidy index..

   479

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

   480

	if (i >= lengthof(_subsidies))

   481

		return;

   482

   483

	s = &_subsidies[i];

   484

   485

	// Only want passengers

   486

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

   487

		return;

   488

	fr->cargo = s->cargo_type;

   489

   490

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

   491

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

   492

   493

	// They must be big enough

   494

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

   495

		return;

   496

   497

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

   498

}

   499

   500

static void AiFindRandomIndustryRoute(FoundRoute *fr)

   501

{

   502

	Industry *i,*i2;

   503

	Town *t;

   504

	uint32 r;

   505

	byte cargo;

   506

   507

	// initially error

   508

	fr->distance = -1;

   509

   510

	r = Random();

   511

   512

	// pick a source

   513

	fr->from = i = AiFindRandomIndustry();

   514

	if (i == NULL)

   515

		return;

   516

   517

	// pick a random produced cargo

   518

	cargo = i->produced_cargo[0];

   519