1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "player.h"

     4

#include "vehicle.h"

     5

#include "engine.h"

     6

#include "command.h"

     7

#include "town.h"

     8

#include "industry.h"

     9

#include "station.h"

    10

#include "pathfind.h"

    11

#include "economy.h"

    12

#include "airport.h"

    13

    14

// remove some day perhaps?

    15

static Player *_cur_ai_player;

    17

    18

typedef void AiStateAction(Player *p);

    19

    20

enum {

    21

	AIS_0 = 0,

    22

	AIS_1 = 1,

    23

	AIS_VEH_LOOP = 2,

    24

	AIS_VEH_CHECK_REPLACE_VEHICLE = 3,

    25

	AIS_VEH_DO_REPLACE_VEHICLE = 4,

    26

	AIS_WANT_NEW_ROUTE = 5,

    27

	AIS_BUILD_DEFAULT_RAIL_BLOCKS = 6,

    28

	AIS_BUILD_RAIL = 7,

    29

	AIS_BUILD_RAIL_VEH = 8,

    30

	AIS_DELETE_RAIL_BLOCKS = 9,

    31

	AIS_BUILD_DEFAULT_ROAD_BLOCKS = 10,

    32

	AIS_BUILD_ROAD = 11,

    33

	AIS_BUILD_ROAD_VEHICLES = 12,

    34

	AIS_DELETE_ROAD_BLOCKS = 13,

    35

	AIS_AIRPORT_STUFF = 14,

    36

	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,

    37

	AIS_BUILD_AIRCRAFT_VEHICLES = 16,

    38

	AIS_CHECK_SHIP_STUFF = 17,

    39

	AIS_BUILD_DEFAULT_SHIP_BLOCKS = 18,

    40

	AIS_DO_SHIP_STUFF = 19,

    41

	AIS_SELL_VEHICLE = 20,

    42

	AIS_REMOVE_STATION = 21,

    43

	AIS_REMOVE_TRACK = 22,

    44

	AIS_REMOVE_SINGLE_RAIL_TILE = 23

    45

};

    46

    47

    48

#include "table/ai_rail.h"

    49

    50

static byte GetRailTrackStatus(TileIndex tile) {

    51

	uint32 r = GetTileTrackStatus(tile, TRANSPORT_RAIL);

    52

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

    53

}

    54

    55

    56

static void AiCase0(Player *p)

    57

{

    58

	p->ai.state = AIS_REMOVE_TRACK;

    59

	p->ai.state_counter = 0;

    60

}

    61

    62

static void AiCase1(Player *p)

    63

{

    64

	p->ai.cur_veh = NULL;

    65

	p->ai.state = AIS_VEH_LOOP;

    66

}

    67

    68

static void AiStateVehLoop(Player *p)

    69

{

    70

	Vehicle *v;

    71

    72

	v = p->ai.cur_veh == NULL ? _vehicles : p->ai.cur_veh+1;

    73

    74

	for (;v != endof(_vehicles); v++) {

    75

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

    76

			continue;

    77

    78

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

    79

				v->type == VEH_Road ||

    80

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

    81

				v->type == VEH_Ship) {

    82

    83

			/* replace engine? */

    84

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

    85

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

    86

				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;

    87

				p->ai.cur_veh = v;

    88

				return;

    89

			}

    90

    91

			/* not profitable? */

    92

			if (v->age >= 730 &&

    93

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

    94

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

    95

				p->ai.state_counter = 0;

    96

				p->ai.state = AIS_SELL_VEHICLE;

    97

				p->ai.cur_veh = v;

    98

				return;

    99

			}

   100

   101

			/* not reliable? */

   102

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

   103

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

   104

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

   105

				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;

   106

				p->ai.cur_veh = v;

   107

				return;

   108

			}

   109

		}

   110

	}

   111

   112

	p->ai.state = AIS_WANT_NEW_ROUTE;

   113

	p->ai.state_counter = 0;

   114

}

   115

   116

// XXX

   117

static const byte _rail_locos_count[3] = {

   118

	27, 3, 5		

   119

};

   120

extern const byte _rail_engines_start[3];

   121

   122

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

   123

{

   124

	int best_veh_index = -1;

   125

	byte best_veh_score = 0;

   126

	int32 r;

   127

   128

	int i = _rail_engines_start[railtype];

   129

	int end = i + _rail_locos_count[railtype];

   130

	Engine *e = &_engines[i];

   131

	do {

   132

		assert(!(_rail_vehicle_info[i].flags & RVI_WAGON));

   133

   134

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

   135

			continue;

   136

   137

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

   138

		if (r != CMD_ERROR && 

   139

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

   140

					r <= money && 

   141

				_cmd_build_rail_veh_score >= best_veh_score) {

   142

			best_veh_score = _cmd_build_rail_veh_score;

   143

			best_veh_index = i;

   144

		}

   145

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

   146

   147

	return best_veh_index;

   148

}

   149

   150

static int AiChooseRoadVehToBuild(byte cargo, int32 money)

   151

{

   152

	int best_veh_index = -1;

   153

	int32 best_veh_cost = 0;

   154

	int32 r;

   155

   156

	int i = _cargoc.ai_roadveh_start[cargo];

   157

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

   158

	Engine *e = &_engines[i];

   159

	do {

   160

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

   161

			continue;

   162

   163

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

   164

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

   165

			best_veh_cost = r;

   166

			best_veh_index = i;

   167

		}

   168

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

   169

   170

	return best_veh_index;

   171

}

   172

   173

static int AiChooseAircraftToBuild(int32 money, byte flag)

   174

{

   175

	int best_veh_index = -1;

   176

	int32 best_veh_cost = 0;

   177

	int32 r;

   178

   179

	int i = AIRCRAFT_ENGINES_INDEX;

   180

	int end = i + NUM_AIRCRAFT_ENGINES;

   181

	Engine *e = &_engines[i];

   182

	do {

   183

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

   184

			continue;

   185

   186

		if (flag&1) {

   187

			if (i<253) continue;

   188

		} else {

   189

			if (i>=253) continue;

   190

		}

   191

   192

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

   193

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

   194

			best_veh_cost = r;

   195

			best_veh_index = i;

   196

		}

   197

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

   198

   199

	return best_veh_index;

   200

}

   201

   202

static int32 AiGetBasePrice(Player *p)

   203

{

   204

	int32 base = _price.station_value;

   205

   206

	// adjust base price when more expensive vehicles are available

   207

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

   208

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

   209

   210

	return base;

   211

}

   212

   213

#if 0

   214

static int AiChooseShipToBuild(byte cargo, int32 money)

   215

{

   216

	// XXX: not done

   217

	return 0;

   218

}

   219

#endif

   220

   221

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

   222

{

   223

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

   224

	return AiChooseRoadVehToBuild(v->cargo_type, avail_money);

   225

}

   226

   227

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

   228

{

   229

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

   230

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

   231

}

   232

   233

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

   234

{

   235

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

   236

	int num=0;

   237

	Vehicle *u = v;

   238

   239

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

   240

		u = u->next;

   241

	}

   242

   243

	// XXX: check if a wagon

   244

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

   245

}

   246

   247

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

   248

{

   249

	error("!AiChooseShipToReplaceWith");

   250

   251

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

   252

	return 0;

   253

}

   254

   255

static void AiHandleGotoDepot(Player *p, int cmd)

   256

{

   257

	if ((p->ai.cur_veh->next_order & OT_MASK) != OT_GOTO_DEPOT)

   258

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

   259

   260

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

   261

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   262

		return;

   263

	}

   264

   265

	if ((p->ai.cur_veh->next_order&OT_MASK) == OT_GOTO_DEPOT) {

   266

		p->ai.cur_veh->next_order = OT_DUMMY;

   267

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

   268

	}

   269

} 

   270

   271

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

   272

{

   273

	uint16 *os = bak->order, ord;

   274

	int ind = 0;

   275

	while ((ord = *os++) != 0) {

   276

		if (DoCommandByTile(0, v->index + (ind << 16), ord, DC_EXEC, CMD_INSERT_ORDER) == CMD_ERROR)

   277

			break;

   278

		ind++;

   279

	}

   280

}

   281

   282

static void AiHandleReplaceTrain(Player *p)

   283

{

   284

	Vehicle *v = p->ai.cur_veh;

   285

	BackuppedOrders orderbak[1];

   286

	int veh;

   287

	uint tile;

   288

   289

	// wait until the vehicle reaches the depot.

   290

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

   291

		AiHandleGotoDepot(p, CMD_TRAIN_GOTO_DEPOT);

   292

		return;

   293

	}

   294

   295

	veh = AiChooseTrainToReplaceWith(p, v);

   296

	if (veh != -1) {

   297

		BackupVehicleOrders(v, orderbak);

   298

		tile = v->tile;

   299

   300

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

   301

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

   302

			veh = _new_train_id;

   303

			AiRestoreVehicleOrders(&_vehicles[veh], orderbak);

   304

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

   307

		}

   308

	}

   309

}

   310

   311

static void AiHandleReplaceRoadVeh(Player *p)

   312

{

   313

	Vehicle *v = p->ai.cur_veh;

   314

	BackuppedOrders orderbak[1];

   315

	int veh;

   316

	uint tile;

   317

   318

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

   319

		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);

   320

		return;

   321

	}

   322

   323

	veh = AiChooseRoadVehToReplaceWith(p, v);

   324

	if (veh != -1) {

   325

		BackupVehicleOrders(v, orderbak);

   326

		tile = v->tile;

   327

   328

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

   329

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

   330

			veh = _new_roadveh_id;

   331

			AiRestoreVehicleOrders(&_vehicles[veh], orderbak);

   332

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

   335

		}

   336

	}

   337

}

   338

   339

static void AiHandleReplaceAircraft(Player *p)

   340

{

   341

	Vehicle *v = p->ai.cur_veh;

   342

	int veh;

   343

	BackuppedOrders orderbak[1];

   344

	uint tile;

   345

   346

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

   347

		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);

   348

		return;

   349

	}

   350

   351

	veh = AiChooseAircraftToReplaceWith(p, v);

   352

	if (veh != -1) {

   353

		BackupVehicleOrders(v, orderbak);

   354

		tile = v->tile;

   355

   356

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

   357

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

   358

			veh = _new_aircraft_id;

   359

			AiRestoreVehicleOrders(&_vehicles[veh], orderbak);

   360

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

   363

		}

   364

	}

   365

}

   366

   367

static void AiHandleReplaceShip(Player *p)

   368

{

   369

	error("!AiHandleReplaceShip");

   370

}

   371

   372

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

   373

   374

static CheckReplaceProc * const _veh_check_replace_proc[] = {

   375

	AiChooseTrainToReplaceWith,

   376

	AiChooseRoadVehToReplaceWith,

   377

	AiChooseShipToReplaceWith,

   378

	AiChooseAircraftToReplaceWith,

   379

};

   380

   381

typedef void DoReplaceProc(Player *p);

   382

static DoReplaceProc * const _veh_do_replace_proc[] = {

   383

	AiHandleReplaceTrain,

   384

	AiHandleReplaceRoadVeh,

   385

	AiHandleReplaceShip,

   386

	AiHandleReplaceAircraft

   387

};

   388

   389

static void AiStateCheckReplaceVehicle(Player *p)

   390

{

   391

	Vehicle *v = p->ai.cur_veh;

   392

   393

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

   394

		p->ai.state = AIS_VEH_LOOP;

   395

	} else {

   396

		p->ai.state_counter = 0;

   397

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   398

	}

   399

}

   400

   401

static void AiStateDoReplaceVehicle(Player *p)

   402

{

   403

	Vehicle *v = p->ai.cur_veh;

   404

	p->ai.state = AIS_VEH_LOOP;

   405

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

   406

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

   407

		return;

   408

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

   409

}

   410

   411

typedef struct FoundRoute {

   412

	int distance;

   413

	byte cargo;

   414

	void *from;

   415

	void *to;

   416

} FoundRoute;

   417

   418

static Town *AiFindRandomTown() {

   419

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

   420

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

   421

}

   422

   423

static Industry *AiFindRandomIndustry() {

   424

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

   425

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

   426

}

   427

   428

static void AiFindSubsidyIndustryRoute(FoundRoute *fr)

   429

{

   430

	int i;

   431

	byte cargo;

   432

	Subsidy *s;

   433

	Industry *from, *to_ind;

   434

	Town *to_tow;

   435

	TileIndex to_xy;

   436

   437

	// initially error

   438

	fr->distance = -1;

   439

   440

	// Randomize subsidy index.. 

   441

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

   442

	if (i >= lengthof(_subsidies))

   443

		return;

   444

   445

	s = &_subsidies[i];

   446

   447

	// Don't want passengers or mail

   448

	cargo = s->cargo_type;

   449

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

   450

		return;

   451

	fr->cargo = cargo;

   452

   453

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

   454

   455

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

   456

		to_tow = DEREF_TOWN(s->to);

   457

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

   458

			return; // error

   459

		fr->to = to_tow;

   460

		to_xy = to_tow->xy;

   461

	} else {

   462

		to_ind = DEREF_INDUSTRY(s->to);

   463

		fr->to = to_ind;

   464

		to_xy = to_ind->xy;

   465

	}

   466

   467

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

   468

}

   469

   470

static void AiFindSubsidyPassengerRoute(FoundRoute *fr)

   471

{

   472

	uint i;

   473

	Subsidy *s;

   474

	Town *from,*to;

   475

   476

	// initially error

   477

	fr->distance = -1;

   478

   479

	// Randomize subsidy index.. 

   480

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

   481

	if (i >= lengthof(_subsidies))

   482

		return;

   483

   484

	s = &_subsidies[i];

   485

   486

	// Only want passengers

   487

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

   488

		return;

   489

	fr->cargo = s->cargo_type;

   490

   491

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

   492

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

   493

   494

	// They must be big enough

   495

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

   496

		return;

   497

   498

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

   499

}

   500

   501

static void AiFindRandomIndustryRoute(FoundRoute *fr)

   502

{

   503

	Industry *i,*i2;

   504

	Town *t;

   505

	uint32 r;

   506

	byte cargo;

   507

   508

	// initially error

   509

	fr->distance = -1;

   510

   511

	r = Random();

   512

   513

	// pick a source

   514

	fr->from = i = AiFindRandomIndustry();

   515

	if (i == NULL)	

   516

		return;

   517

   518

	// pick a random produced cargo

   519

	cargo = i->produced_cargo[0];

   520

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

   521

		cargo = i->produced_cargo[1];

   522

   523

	fr->cargo = cargo;

   524

   525

	// don't allow passengers

   526

	if (cargo == 0xFF || cargo == CT_PASSENGERS)

   527

		return;

   528