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

/**

    67

 */

    68

void TrainConsistChanged(Vehicle *v) {

    70

	Vehicle *u;

    71

	uint16 max_speed = 0xFFFF;

    72

	uint32 power = 0;

    81

    82

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

    83

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

    84

    88

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

    89

		power += rvi_u->power;

    90

    91

		// check if its a powered wagon

    92

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

    93

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

    94

			uint16 callback = CALLBACK_FAILED;

    95

    96

			if (HASBIT(rvi_u->callbackmask, CBM_WAGON_POWER))

    97

				callback = GetCallBackResult(CBID_WAGON_POWER,  u->engine_type, u);

    98

    99

			if (callback == CALLBACK_FAILED)

   100

				callback = rvi_u->visual_effect;

   101

   102

			if (callback < 0x40) {

   103

				/* wagon is powered */

   104

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

   105

				power += rvi_v->pow_wag_power;

   106

			}

   107

		}

   108

   109

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

   110

		if (rvi_u->max_speed != 0)

   111

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

   112

	};

   113

   114

	// store consist weight/max speed in cache

   115

	v->u.rail.cached_max_speed = max_speed;

   116

	v->u.rail.cached_power = power;

   117

   118

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

   119

	TrainCargoChanged(v);

   120

}

   121

   122

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

   123

 * be interpreted? */

   124

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

   125

	{7, 1},

   126

	{0, 2},

   127

	{1, 3},

   128

	{2, 4},

   129

	{3, 5},

   130

	{4, 6},

   131

	{5, 7},

   132

	{6, 0},

   133

};

   134

   135

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

   136

	{6, 2},

   137

	{7, 3},

   138

	{0, 4},

   139

	{1, 5},

   140

	{2, 6},

   141

	{3, 7},

   142

	{4, 0},

   143

	{5, 1},

   144

};

   145

   146

enum AccelType {

   147

	AM_ACCEL,

   148

	AM_BRAKE

   149

};

   150

   151

static bool TrainShouldStop(Vehicle *v, TileIndex tile)

   152

{

   153

	Order *o = &v->current_order;

   154

	assert(v->type == VEH_Train);

   155

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

   156

	//When does a train drive through a station

   157

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

   158

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

   159

			_map2[tile] == o->station )

   160

		return false;

   161

   162

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

   163

		return false;

   164

   165

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

   166

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

   167

		return false;

   168

   169

	return true;

   170

}

   171

   172

//new acceleration

   173

static int GetTrainAcceleration(Vehicle *v, bool mode)

   174

{

   175

	const Vehicle *u;

   176

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

   177

	int power = 0;

   178

	int mass = 0;

   179

	int max_speed = 2000;

   180

	int area = 120;

   181

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

   182

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

   183

	int incl = 0;

   184

	int resistance;

   185

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

   186

	int force = 0x3FFFFFFF;

   187

	int pos = 0;

   188

	int lastpos = -1;

   189

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

   190

	int sum = 0;

   191

	int numcurve = 0;

   192

   193

	speed *= 10;

   194

	speed /= 16;

   195

   196

	//first find the curve speed limit

   197

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

   198

		int dir = u->direction;

   199

		int ndir = u->next->direction;

   200

		int i;

   201

   202

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

   203

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

   204

				curvecount[i]++;

   205

				if (lastpos != -1) {

   206

					numcurve++;

   207

					sum += pos - lastpos;

   208

					if (pos - lastpos == 1) {

   209

						max_speed = 88;

   210

					}

   211

				}

   212

				lastpos = pos;

   213

			}

   214

		}

   215

   216

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

   217

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

   218

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

   219

			max_speed = 61;

   220

		}

   221

	}

   222

   223

	if (numcurve > 0) sum /= numcurve;

   224

   225

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

   226

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

   227

   228

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

   229

			max_speed = 0xFFFF;

   230

		} else if (total > 1) {

   231

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

   232

		}

   233

	}

   234

   235

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

   236

   237

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

   238

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

   239

			int station_length = 0;

   240

			TileIndex tile = v->tile;

   241

			int delta_v;

   242

   243

			max_speed = 120;

   244

			do {

   245

				station_length++;

   246

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

   247

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

   248

   249

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

   250

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

   251

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

   252

   253

			max_speed = max(max_speed, 25 * station_length);

   254

		}

   255

	}

   256

   257

	mass = v->u.rail.cached_weight;

   258

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

   259

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

   260

   261

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

   262

		num++;

   263

		drag_coeff += 3;

   264

   265

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

   266

			max_speed = min(61, max_speed);

   267

   268

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

   269

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

   270

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

   271

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

   272

		}

   273

	}

   274

   275

	v->max_speed = max_speed;

   276

   277

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

   278

		resistance = 13 * mass / 10;

   279

		resistance += 60 * num;

   280

		resistance += friction * mass * speed / 1000;

   281

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

   282

	} else

   283

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

   284

	resistance += incl;

   285

	resistance *= 4; //[N]

   286

   287

	if (speed > 0) {

   288

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

   289

			case 0:

   290

			case 1:

   291

				force = power / speed; //[N]

   292

				force *= 22;

   293

				force /= 10;

   294

				break;

   295

   296

			case 2:

   297

				force = power / 25;

   298

				break;

   299

		}

   300

	} else {

   301

		//"kickoff" acceleration

   302

		force = resistance * 10;

   303

	}

   304

   305

	if (force <= 0) force = 10000;

   306

   307

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

   308

   309

	if (mode == AM_ACCEL) {

   310

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

   311

	} else {

   312

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

   313

	}

   314

}

   315

   316

void UpdateTrainAcceleration(Vehicle *v)

   317

{

   318

	uint power = 0;

   319

	uint weight = 0;

   320

   321

	assert(v->subtype == TS_Front_Engine);

   322

   323

	weight = v->u.rail.cached_weight;

   324

	power = v->u.rail.cached_power;

   325

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

   326

   327

	assert(weight != 0);

   328

   329

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

   330

}

   331

   332

int GetTrainImage(const Vehicle *v, byte direction)

   333

{

   334

	int img = v->spritenum;

   335

	int base;

   336

   337

	if (is_custom_sprite(img)) {

   338

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

   339

		if (base != 0) return base;

   340

		img = _engine_original_sprites[v->engine_type];

   341

	}

   342

   343

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

   344

   345

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

   346

		base += _wagon_full_adder[img];

   347

	return base;

   348

}

   349

   350

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

   351

{

   352

	const RailVehicleInfo *rvi = RailVehInfo(engine);

   353

   354

	int img = rvi->image_index;

   355

	uint32 image = 0;

   356

   357

	if (is_custom_sprite(img)) {

   358

		image = GetCustomVehicleIcon(engine, 6);

   359

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

   360

	}

   361

	if (image == 0) {

   362

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

   363

	}

   364

   365

	if (rvi->flags & RVI_MULTIHEAD) {

   366

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

   367

		x += 15;

   368

		image = 0;

   369

		if (is_custom_sprite(img)) {

   370

			image = GetCustomVehicleIcon(engine, 2);

   371

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

   372

		}

   373

		if (image == 0) {

   374

			image =

   375

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

   376

				_engine_sprite_base[img + 1];

   377

		}

   378

	}

   379

	DrawSprite(image | image_ormod, x, y);

   380

}

   381

   382

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

   383

{

   384

	const RailVehicleInfo *rvi = RailVehInfo(engine);

   385

	int cap;

   386

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

   387

   388

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

   389

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

   390

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

   391

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

   392

   393

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

   394

   395

	cap = rvi->capacity;

   396

	SetDParam(5, STR_8838_N_A);

   397

	if (cap != 0) {

   398

		SetDParam(6, cap << multihead);

   399

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

   400

	}

   401

	DrawStringMultiCenter(x, y, STR_885B_COST_WEIGHT_T_SPEED_POWER, maxw);

   402

}

   403

   404

   405

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

   406

{

   407

	int32 value;

   408

	Vehicle *v;

   409

	const RailVehicleInfo *rvi;

   410

	int dir;

   411

	const Engine *e;

   412

	int x,y;

   413

   414

	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);

   415

   416

	rvi = RailVehInfo(engine);

   417

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

   418

   419

	if (!(flags & DC_QUERY_COST)) {

   420

		_error_message = STR_00E1_TOO_MANY_VEHICLES_IN_GAME;

   421

   422

		v = AllocateVehicle();

   423

		if (v == NULL)

   424

			return CMD_ERROR;

   425

   426

		if (flags & DC_EXEC) {

   427

			byte img = rvi->image_index;

   428

			Vehicle *u, *w;

   429

   430

			v->spritenum = img;

   431

   432

			u = NULL;

   433

   434

			FOR_ALL_VEHICLES(w) {

   435

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

   436

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

   437

					u = GetLastVehicleInChain(w);

   438

					break;

   439

				}

   440

			}

   441

   442

			v->engine_type = engine;

   443

   444

			dir = _map5[tile] & 3;

   445

   446

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

   447

			v->tile = (TileIndex)tile;

   448

   449

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

   450

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

   451

   452

			v->x_pos = x;

   453

			v->y_pos = y;

   454

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

   455

			v->owner = _current_player;

   456

			v->z_height = 6;

   457

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

   458

			v->vehstatus = VS_HIDDEN | VS_DEFPAL;

   459

   460

			v->subtype = TS_Free_Car;

   461

			if (u != NULL) {

   462

				u->next = v;

   463

				v->subtype = TS_Not_First;

   464

			}

   465

   466

			v->cargo_type = rvi->cargo_type;

   467

			v->cargo_cap = rvi->capacity;

   468

			v->value = value;

   469

//			v->day_counter = 0;

   470

   471

			e = &_engines[engine];

   472

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

   473

   474

			v->build_year = _cur_year;

   475

			v->type = VEH_Train;

   476

			v->cur_image = 0xAC2;

   477

   478

			_new_wagon_id = v->index;

   479

   480

			VehiclePositionChanged(v);

   482

   483

			InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);

   484

		}

   485

	}

   486

   487

	return value;

   488

}

   489

   490

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

   491

static void NormalizeTrainVehInDepot(Vehicle *u)

   492

{

   493

	Vehicle *v;

   494

   495

	FOR_ALL_VEHICLES(v) {