1

#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "table/strings.h"

     4

#include "map.h"

     5

#include "tile.h"

     6

#include "vehicle.h"

     7

#include "command.h"

     8

#include "pathfind.h"

     9

#include "npf.h"

    10

#include "station.h"

    11

#include "table/train_cmd.h"

    12

#include "gfx.h"

    13

#include "news.h"

    14

#include "engine.h"

    15

#include "player.h"

    16

#include "sound.h"

    17

#include "depot.h"

    18

#include "waypoint.h"

    19

#include "vehicle_gui.h"

    20

    21

#define IS_FIRSTHEAD_SPRITE(spritenum) \

    22

	(is_custom_sprite(spritenum) ? IS_CUSTOM_FIRSTHEAD_SPRITE(spritenum) : _engine_sprite_add[spritenum] == 0)

    23

    24

static bool TrainCheckIfLineEnds(Vehicle *v);

    25

extern void ShowTrainViewWindow(Vehicle *v);

    26

    27

static const byte _vehicle_initial_x_fract[4] = {10,8,4,8};

    28

static const byte _vehicle_initial_y_fract[4] = {8,4,8,10};

    29

static const byte _state_dir_table[4] = { 0x20, 8, 0x10, 4 };

    30

    31

/**

    32

 * Recalculates the cached weight of a train and its vehicles. Should be called each time the cargo on

    33

 * the consist changes.

    34

 * @param v First vehicle of the consist.

    35

 */

    36

void TrainCargoChanged(Vehicle *v) {

    37

	Vehicle *u;

    38

	uint16 weight = 0;

    39

    40

	for (u = v; u != NULL; u = u->next) {

    41

		const RailVehicleInfo *rvi = RailVehInfo(u->engine_type);

    42

		uint16 vweight = 0;

    43

    44

		// vehicle weight is the sum of the weight of the vehicle and the weight of its cargo

    45

		vweight += rvi->weight;

    46

		vweight += (_cargoc.weights[u->cargo_type] * u->cargo_count) / 16;

    47

		// powered wagons have extra weight added

    48

		if HASBIT(u->u.rail.flags, VRF_POWEREDWAGON)

    49

			vweight += RailVehInfo(v->engine_type)->pow_wag_weight;

    50

    51

		// consist weight is the sum of the weight of all vehicles in the consist

    52

		weight += vweight;

    53

    54

		// store vehicle weight in cache

    55

		u->u.rail.cached_veh_weight = vweight;

    56

	};

    57

    58

	// store consist weight in cache

    59

	v->u.rail.cached_weight = weight;

    60

}

    61

    62

/**

    63

 * Recalculates the cached stuff of a train. Should be called each time a vehicle is added to/removed from

    64

 * the consist, and when the game is loaded.

    65

 * @param v First vehicle of the consist.

    66

 */

    67

void TrainConsistChanged(Vehicle *v) {

    68

	const RailVehicleInfo *rvi_v = RailVehInfo(v->engine_type);

    69

	Vehicle *u;

    70

	uint16 max_speed = 0xFFFF;

    71

	uint32 power = 0;

    72

    73

	for (u = v; u != NULL; u = u->next) {

    74

		const RailVehicleInfo *rvi_u = RailVehInfo(u->engine_type);

    75

    76

		// power is the sum of the powers of all engines and powered wagons in the consist

    77

		power += rvi_u->power;

    78

    79

		// check if its a powered wagon

    80

		CLRBIT(u->u.rail.flags, VRF_POWEREDWAGON);

    81

		if ((rvi_v->pow_wag_power != 0) && (rvi_u->flags & RVI_WAGON) && UsesWagonOverride(u)) {

    86

    87

			if (callback == CALLBACK_FAILED)

    88

				callback = rvi_u->visual_effect;

    89

    90

			if (callback < 0x40) {

    91

				/* wagon is powered */

    92

				SETBIT(u->u.rail.flags, VRF_POWEREDWAGON); // cache 'powered' status

    93

				power += rvi_v->pow_wag_power;

    94

			}

    95

		}

    96

    97

		// max speed is the minimum of the speed limits of all vehicles in the consist

    98

		if (rvi_u->max_speed != 0)

    99

			max_speed = min(rvi_u->max_speed, max_speed);

   100

	};

   101

   102

	// store consist weight/max speed in cache

   103

	v->u.rail.cached_max_speed = max_speed;

   104

	v->u.rail.cached_power = power;

   105

   106

	// recalculate cached weights too (we do this *after* the rest, so it is known which wagons are powered and need extra weight added)

   107

	TrainCargoChanged(v);

   108

}

   109

   110

/* These two arrays are used for realistic acceleration. XXX: How should they

   111

 * be interpreted? */

   112

static const byte _curve_neighbours45[8][2] = {

   113

	{7, 1},

   114

	{0, 2},

   115

	{1, 3},

   116

	{2, 4},

   117

	{3, 5},

   118

	{4, 6},

   119

	{5, 7},

   120

	{6, 0},

   121

};

   122

   123

static const byte _curve_neighbours90[8][2] = {

   124

	{6, 2},

   125

	{7, 3},

   126

	{0, 4},

   127

	{1, 5},

   128

	{2, 6},

   129

	{3, 7},

   130

	{4, 0},

   131

	{5, 1},

   132

};

   133

   134

enum AccelType {

   135

	AM_ACCEL,

   136

	AM_BRAKE

   137

};

   138

   139

static bool TrainShouldStop(Vehicle *v, TileIndex tile)

   140

{

   141

	Order *o = &v->current_order;

   142

	assert(v->type == VEH_Train);

   143

	assert(IsTileType(v->tile, MP_STATION));

   144

	//When does a train drive through a station

   145

	//first we deal with the "new nonstop handling"

   146

	if (_patches.new_nonstop && o->flags & OF_NON_STOP &&

   147

			_map2[tile] == o->station )

   148

		return false;

   149

   150

	if (v->last_station_visited == _map2[tile])

   151

		return false;

   152

   153

	if (_map2[tile] != o->station &&

   154

			(o->flags & OF_NON_STOP || _patches.new_nonstop))

   155

		return false;

   156

   157

	return true;

   158

}

   159

   160

//new acceleration

   161

static int GetTrainAcceleration(Vehicle *v, bool mode)

   162

{

   163

	const Vehicle *u;

   164

	int num = 0;	//number of vehicles, change this into the number of axles later

   165

	int power = 0;

   166

	int mass = 0;

   167

	int max_speed = 2000;

   168

	int area = 120;

   169

	int friction = 35; //[1e-3]

   170

	int drag_coeff = 20;	//[1e-4]

   171

	int incl = 0;

   172

	int resistance;

   173

	int speed = v->cur_speed; //[mph]

   174

	int force = 0x3FFFFFFF;

   175

	int pos = 0;

   176

	int lastpos = -1;

   177

	int curvecount[2] = {0, 0};

   178

	int sum = 0;

   179

	int numcurve = 0;

   180

   181

	speed *= 10;

   182

	speed /= 16;

   183

   184

	//first find the curve speed limit

   185

	for (u = v; u->next != NULL; u = u->next, pos++) {

   186

		int dir = u->direction;

   187

		int ndir = u->next->direction;

   188

		int i;

   189

   190

		for (i = 0; i < 2; i++) {

   191

			if ( _curve_neighbours45[dir][i] == ndir) {

   192

				curvecount[i]++;

   193

				if (lastpos != -1) {

   194

					numcurve++;

   195

					sum += pos - lastpos;

   196

					if (pos - lastpos == 1) {

   197

						max_speed = 88;

   198

					}

   199

				}

   200

				lastpos = pos;

   201

			}

   202

		}

   203

   204

		//if we have a 90 degree turn, fix the speed limit to 60

   205

		if (_curve_neighbours90[dir][0] == ndir ||

   206

				_curve_neighbours90[dir][1] == ndir) {

   207

			max_speed = 61;

   208

		}

   209

	}

   210

   211

	if (numcurve > 0) sum /= numcurve;

   212

   213

	if ((curvecount[0] != 0 || curvecount[1] != 0) && max_speed > 88) {

   214

		int total = curvecount[0] + curvecount[1];

   215

   216

		if (curvecount[0] == 1 && curvecount[1] == 1) {

   217

			max_speed = 0xFFFF;

   218

		} else if (total > 1) {

   219

			max_speed = 232 - (13 - clamp(sum, 1, 12)) * (13 - clamp(sum, 1, 12));

   220

		}

   221

	}

   222

   223

	max_speed += (max_speed / 2) * v->u.rail.railtype;

   224

   225

	if (IsTileType(v->tile, MP_STATION) && v->subtype == TS_Front_Engine) {

   226

		if (TrainShouldStop(v, v->tile)) {

   227

			int station_length = 0;

   228

			TileIndex tile = v->tile;

   229

			int delta_v;

   230

   231

			max_speed = 120;

   232

			do {

   233

				station_length++;

   234

				tile = TILE_ADD(tile, TileOffsByDir(v->direction / 2));

   235

			} while (IsCompatibleTrainStationTile(tile, v->tile));

   236

   237

			delta_v = v->cur_speed / (station_length + 1);

   238

			if (v->max_speed > (v->cur_speed - delta_v))

   239

				max_speed = v->cur_speed - (delta_v / 10);

   240

   241

			max_speed = max(max_speed, 25 * station_length);

   242

		}

   243

	}

   244

   245

	mass = v->u.rail.cached_weight;

   246

	power = v->u.rail.cached_power * 746;

   247

	max_speed = min(max_speed, v->u.rail.cached_max_speed);

   248

   249

	for (u = v; u != NULL; u = u->next) {

   250

		num++;

   251

		drag_coeff += 3;

   252

   253

		if (u->u.rail.track == 0x80)

   254

			max_speed = min(61, max_speed);

   255

   256

		if (HASBIT(u->u.rail.flags, VRF_GOINGUP)) {

   257

			incl += u->u.rail.cached_veh_weight * 60;		//3% slope, quite a bit actually

   258

		} else if (HASBIT(u->u.rail.flags, VRF_GOINGDOWN)) {

   259

			incl -= u->u.rail.cached_veh_weight * 60;

   260

		}

   261

	}

   262

   263

	v->max_speed = max_speed;

   264

   265

	if (v->u.rail.railtype != 2) {

   266

		resistance = 13 * mass / 10;

   267

		resistance += 60 * num;

   268

		resistance += friction * mass * speed / 1000;

   269

		resistance += (area * drag_coeff * speed * speed) / 10000;

   270

	} else

   271

		resistance = (area * (drag_coeff / 2) * speed * speed) / 10000;

   272

	resistance += incl;

   273

	resistance *= 4; //[N]

   274

   275

	if (speed > 0) {

   276

		switch (v->u.rail.railtype) {

   277

			case 0:

   278

			case 1:

   279

				force = power / speed; //[N]

   280

				force *= 22;

   281

				force /= 10;

   282

				break;

   283

   284

			case 2:

   285

				force = power / 25;

   286

				break;

   287

		}

   288

	} else {

   289

		//"kickoff" acceleration

   290

		force = resistance * 10;

   291

	}

   292

   293

	if (force <= 0) force = 10000;

   294

   295

	if (v->u.rail.railtype != 2) force = min(force, mass * 10 * 200);

   296

   297

	if (mode == AM_ACCEL) {

   298

		return (force - resistance) / (mass * 4);

   299

	} else {

   300

		return min((-force - resistance) / (mass * 4), 10000 / (mass * 4));

   301

	}

   302

}

   303

   304

void UpdateTrainAcceleration(Vehicle *v)

   305

{

   306

	uint power = 0;

   307

	uint weight = 0;

   308

   309

	assert(v->subtype == TS_Front_Engine);

   310

   311

	weight = v->u.rail.cached_weight;

   312

	power = v->u.rail.cached_power;

   313

	v->max_speed = v->u.rail.cached_max_speed;

   314

   315

	assert(weight != 0);

   316

   317

	v->acceleration = clamp(power / weight * 4, 1, 255);

   318

}

   319

   320

int GetTrainImage(const Vehicle *v, byte direction)

   321

{

   322

	int img = v->spritenum;

   323

	int base;

   324

   325

	if (is_custom_sprite(img)) {

   326

		base = GetCustomVehicleSprite(v, direction + 4 * IS_CUSTOM_SECONDHEAD_SPRITE(img));

   327

		if (base != 0) return base;

   328

		img = _engine_original_sprites[v->engine_type];

   329

	}

   330

   331

	base = _engine_sprite_base[img] + ((direction + _engine_sprite_add[img]) & _engine_sprite_and[img]);

   332

   333

	if (v->cargo_count >= (v->cargo_cap >> 1))

   334

		base += _wagon_full_adder[img];

   335

	return base;

   336

}

   337

   338

void DrawTrainEngine(int x, int y, int engine, uint32 image_ormod)

   339

{

   340

	const RailVehicleInfo *rvi = RailVehInfo(engine);

   341

   342

	int img = rvi->image_index;

   343

	uint32 image = 0;

   344

   345

	if (is_custom_sprite(img)) {

   346

		image = GetCustomVehicleIcon(engine, 6);

   347

		if (image == 0) img = _engine_original_sprites[engine];

   348

	}

   349

	if (image == 0) {

   350

		image = (6 & _engine_sprite_and[img]) + _engine_sprite_base[img];

   351

	}

   352

   353

	if (rvi->flags & RVI_MULTIHEAD) {

   354

		DrawSprite(image | image_ormod, x - 14, y);

   355

		x += 15;

   356

		image = 0;

   357

		if (is_custom_sprite(img)) {

   358

			image = GetCustomVehicleIcon(engine, 2);

   359

			if (image == 0) img = _engine_original_sprites[engine];

   360

		}

   361

		if (image == 0) {

   362

			image =

   363

				((6 + _engine_sprite_add[img + 1]) & _engine_sprite_and[img + 1]) +

   364

				_engine_sprite_base[img + 1];

   365

		}

   366

	}

   367

	DrawSprite(image | image_ormod, x, y);

   368

}

   369

   370

void DrawTrainEngineInfo(int engine, int x, int y, int maxw)

   371

{

   372

	const RailVehicleInfo *rvi = RailVehInfo(engine);

   373

	int cap;

   374

	uint multihead = (rvi->flags & RVI_MULTIHEAD) ? 1 : 0;

   375

   376

	SetDParam(0, ((_price.build_railvehicle >> 3) * rvi->base_cost) >> 5);

   377

	SetDParam(2, rvi->max_speed * 10 >> 4);

   378

	SetDParam(3, rvi->power << multihead);

   379

	SetDParam(1, rvi->weight << multihead);

   380

   381

	SetDParam(4, (rvi->running_cost_base * _price.running_rail[rvi->engclass] >> 8) << multihead);

   382

   383

	cap = rvi->capacity;

   384

	SetDParam(5, STR_8838_N_A);

   385

	if (cap != 0) {

   386

		SetDParam(6, cap << multihead);

   387

		SetDParam(5, _cargoc.names_long_p[rvi->cargo_type]);

   388

	}

   389

	DrawStringMultiCenter(x, y, STR_885B_COST_WEIGHT_T_SPEED_POWER, maxw);

   390

}

   391

   392

   393

static int32 CmdBuildRailWagon(uint engine, uint tile, uint32 flags)

   394

{

   395

	int32 value;

   396

	Vehicle *v;

   397

	const RailVehicleInfo *rvi;

   398

	int dir;

   399

	const Engine *e;

   400

	int x,y;

   401

   402

	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);

   403

   404

	rvi = RailVehInfo(engine);

   405

	value = (rvi->base_cost * _price.build_railwagon) >> 8;

   406

   407

	if (!(flags & DC_QUERY_COST)) {

   408

		_error_message = STR_00E1_TOO_MANY_VEHICLES_IN_GAME;

   409

   410

		v = AllocateVehicle();

   411

		if (v == NULL)

   412

			return CMD_ERROR;

   413

   414

		if (flags & DC_EXEC) {

   415

			byte img = rvi->image_index;

   416

			Vehicle *u, *w;

   417

   418

			v->spritenum = img;

   419

   420

			u = NULL;

   421

   422

			FOR_ALL_VEHICLES(w) {

   423

				if (w->type == VEH_Train && w->tile == (TileIndex)tile &&

   424

				    w->subtype == TS_Free_Car && w->engine_type == engine) {

   425

					u = GetLastVehicleInChain(w);

   426

					break;

   427

				}

   428

			}

   429

   430

			v->engine_type = engine;

   431

   432

			dir = _map5[tile] & 3;

   433

   434

			v->direction = (byte)(dir*2+1);

   435

			v->tile = (TileIndex)tile;

   436

   437

			x = TileX(tile) * 16 | _vehicle_initial_x_fract[dir];

   438

			y = TileY(tile) * 16 | _vehicle_initial_y_fract[dir];

   439

   440

			v->x_pos = x;

   441

			v->y_pos = y;

   442

			v->z_pos = GetSlopeZ(x,y);

   443

			v->owner = _current_player;

   444

			v->z_height = 6;

   445

			v->u.rail.track = 0x80;

   446

			v->vehstatus = VS_HIDDEN | VS_DEFPAL;

   447

   448

			v->subtype = TS_Free_Car;

   449

			if (u != NULL) {

   450

				u->next = v;

   451

				v->subtype = TS_Not_First;

   452

				v->u.rail.first_engine = u->u.rail.first_engine;

   453

				if (v->u.rail.first_engine == 0xffff && u->subtype == TS_Front_Engine)

   454

					v->u.rail.first_engine = u->engine_type;

   455

			} else {

   456

				v->u.rail.first_engine = 0xffff;

   457

			}

   458

   459

			v->cargo_type = rvi->cargo_type;

   460

			v->cargo_cap = rvi->capacity;

   461

			v->value = value;

   462

//			v->day_counter = 0;

   463

   464

			e = &_engines[engine];

   465

			v->u.rail.railtype = e->railtype;

   466

   467

			v->build_year = _cur_year;

   468

			v->type = VEH_Train;

   469

			v->cur_image = 0xAC2;

   470

   471

			_new_wagon_id = v->index;

   472

   473

			VehiclePositionChanged(v);

   474

   475

			InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);

   476

		}

   477

	}

   478

   479

	return value;

   480

}

   481

   482

// Move all free vehicles in the depot to the train

   483

static void NormalizeTrainVehInDepot(Vehicle *u)

   484

{

   485

	Vehicle *v;

   486

   487

	FOR_ALL_VEHICLES(v) {

   488

		if (v->type == VEH_Train && v->subtype == TS_Free_Car &&

   489

				v->tile == u->tile &&

   490

				v->u.rail.track == 0x80) {

   491

			if (DoCommandByTile(0, v->index | (u->index << 16), 1, DC_EXEC,

   492

					CMD_MOVE_RAIL_VEHICLE) == CMD_ERROR)

   493

				break;

   494

		}

   495

	}

   496

}