1

/* $Id$ */

     2

     3

/** @file disaster_cmd.cpp

     4

 * All disaster/easter egg vehicles are handled here.

     5

 * The general flow of control for the disaster vehicles is as follows:

     6

 * <ol>

     7

 * <li>Initialize the disaster in a disaster specific way (eg start position,

     8

 *     possible target, etc.) Disaster_XXX_Init() function

     9

 * <li>Add a subtype to a disaster, which is an index into the function array

    10

 *     that handles the vehicle's ticks.

    11

 * <li>Run the disaster vehicles each tick until their target has been reached,

    12

 *     this happens in the DisasterTick_XXX() functions. In here, a vehicle's

    13

 *     state is kept by v->current_order.dest variable. Each achieved sub-target

    14

 *     will increase this value, and the last one will remove the disaster itself

    15

 * </ol>

    16

 */

    17

    18

    19

#include "stdafx.h"

    20

#include "openttd.h"

    21

#include "functions.h"

    22

#include "landscape.h"

    23

#include "industry_map.h"

    24

#include "station_map.h"

    25

#include "table/strings.h"

    26

#include "map.h"

    27

#include "tile.h"

    28

#include "vehicle.h"

    29

#include "command.h"

    30

#include "news.h"

    31

#include "station.h"

    32

#include "waypoint.h"

    33

#include "town.h"

    34

#include "industry.h"

    35

#include "player.h"

    36

#include "airport.h"

    37

#include "sound.h"

    38

#include "variables.h"

    39

#include "table/sprites.h"

    40

#include "date.h"

    41

    42

enum DisasterSubType {

    43

	ST_Zeppeliner,

    44

	ST_Zeppeliner_Shadow,

    45

	ST_Small_Ufo,

    46

	ST_Small_Ufo_Shadow,

    47

	ST_Airplane,

    48

	ST_Airplane_Shadow,

    49

	ST_Helicopter,

    50

	ST_Helicopter_Shadow,

    51

	ST_Helicopter_Rotors,

    52

	ST_Big_Ufo,

    53

	ST_Big_Ufo_Shadow,

    54

	ST_Big_Ufo_Destroyer,

    55

	ST_Big_Ufo_Destroyer_Shadow,

    56

	ST_Small_Submarine,

    57

	ST_Big_Submarine,

    58

};

    59

    60

static void DisasterClearSquare(TileIndex tile)

    61

{

    62

	if (!EnsureNoVehicle(tile)) return;

    63

    64

	switch (GetTileType(tile)) {

    65

		case MP_RAILWAY:

    66

			if (IsHumanPlayer(GetTileOwner(tile)) && !IsRailWaypoint(tile)) {

    67

				PlayerID p = _current_player;

    68

				_current_player = OWNER_WATER;

    69

				DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

    70

				_current_player = p;

    71

			}

    72

			break;

    73

    74

		case MP_HOUSE: {

    75

			PlayerID p = _current_player;

    76

			_current_player = OWNER_NONE;

    77

			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

    78

			_current_player = p;

    79

			break;

    80

		}

    81

    82

		case MP_TREES:

    83

		case MP_CLEAR:

    84

			DoClearSquare(tile);

    85

			break;

    86

    87

		default:

    88

			break;

    89

	}

    90

}

    91

    92

static const SpriteID _disaster_images_1[] = {SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP, SPR_BLIMP};

    93

static const SpriteID _disaster_images_2[] = {SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT, SPR_UFO_SMALL_SCOUT};

    94

static const SpriteID _disaster_images_3[] = {SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15, SPR_F_15};

    95

static const SpriteID _disaster_images_4[] = {SPR_SUB_SMALL_NE, SPR_SUB_SMALL_NE, SPR_SUB_SMALL_SE, SPR_SUB_SMALL_SE, SPR_SUB_SMALL_SW, SPR_SUB_SMALL_SW, SPR_SUB_SMALL_NW, SPR_SUB_SMALL_NW};

    96

static const SpriteID _disaster_images_5[] = {SPR_SUB_LARGE_NE, SPR_SUB_LARGE_NE, SPR_SUB_LARGE_SE, SPR_SUB_LARGE_SE, SPR_SUB_LARGE_SW, SPR_SUB_LARGE_SW, SPR_SUB_LARGE_NW, SPR_SUB_LARGE_NW};

    97

static const SpriteID _disaster_images_6[] = {SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER, SPR_UFO_HARVESTER};

    98

static const SpriteID _disaster_images_7[] = {SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER, SPR_XCOM_SKYRANGER};

    99

static const SpriteID _disaster_images_8[] = {SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A, SPR_AH_64A};

   100

static const SpriteID _disaster_images_9[] = {SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1};

   101

   102

static const SpriteID * const _disaster_images[] = {

   103

	_disaster_images_1, _disaster_images_1,                     ///< zeppeliner and zeppeliner shadow

   104

	_disaster_images_2, _disaster_images_2,                     ///< small ufo and small ufo shadow

   105

	_disaster_images_3, _disaster_images_3,                     ///< combat aircraft and shadow

   106

	_disaster_images_8, _disaster_images_8, _disaster_images_9, ///< combat helicopter, shadow and rotor

   107

	_disaster_images_6, _disaster_images_6,                     ///< big ufo and shadow

   108

	_disaster_images_7, _disaster_images_7,                     ///< skyranger and shadow

   109

	_disaster_images_4, _disaster_images_5,                     ///< small and big submarine sprites

   110

};

   111

   112

static void DisasterVehicleUpdateImage(Vehicle *v)

   113

{

   114

	SpriteID img = v->u.disaster.image_override;

   115

	if (img == 0) img = _disaster_images[v->subtype][v->direction];

   116

	v->cur_image = img;

   117

}

   118

   119

   120

/** Initialize a disaster vehicle. These vehicles are of type VEH_DISASTER, are unclickable

   121

 * and owned by nobody */

   122

static void InitializeDisasterVehicle(Vehicle *v, int x, int y, byte z, Direction direction, byte subtype)

   123

{

   124

	v->type = VEH_DISASTER;

   125

	v->x_pos = x;

   126

	v->y_pos = y;

   127

	v->z_pos = z;

   128

	v->tile = TileVirtXY(x, y);

   129

	v->direction = direction;

   130

	v->subtype = subtype;

   131

	v->x_offs = -1;

   132

	v->y_offs = -1;

   133

	v->sprite_width = 2;

   134

	v->sprite_height = 2;

   135

	v->z_height = 5;

   136

	v->owner = OWNER_NONE;

   137

	v->vehstatus = VS_UNCLICKABLE;

   138

	v->u.disaster.image_override = 0;

   139

	v->current_order.Free();

   140

   141

	DisasterVehicleUpdateImage(v);

   142

	VehiclePositionChanged(v);

   143

	BeginVehicleMove(v);

   144

	EndVehicleMove(v);

   145

}

   146

   147

static void DeleteDisasterVeh(Vehicle *v)

   148

{

   149

	DeleteVehicleChain(v);

   150

}

   151

   152

static void SetDisasterVehiclePos(Vehicle *v, int x, int y, byte z)

   153

{

   154

	Vehicle *u;

   155

   156

	BeginVehicleMove(v);

   157

	v->x_pos = x;

   158

	v->y_pos = y;

   159

	v->z_pos = z;

   160

	v->tile = TileVirtXY(x, y);

   161

   162

	DisasterVehicleUpdateImage(v);

   163

	VehiclePositionChanged(v);

   164

	EndVehicleMove(v);

   165

   166

	if ((u = v->next) != NULL) {

   167

		int safe_x = clamp(x, 0, MapMaxX() * TILE_SIZE);

   168

		int safe_y = clamp(y - 1, 0, MapMaxY() * TILE_SIZE);

   169

		BeginVehicleMove(u);

   170

   171

		u->x_pos = x;

   172

		u->y_pos = y - 1 - (max(z - GetSlopeZ(safe_x, safe_y), 0U) >> 3);

   173

		safe_y = clamp(u->y_pos, 0, MapMaxY() * TILE_SIZE);

   174

		u->z_pos = GetSlopeZ(safe_x, safe_y);

   175

		u->direction = v->direction;

   176

   177

		DisasterVehicleUpdateImage(u);

   178

		VehiclePositionChanged(u);

   179

		EndVehicleMove(u);

   180

   181

		if ((u = u->next) != NULL) {

   182

			BeginVehicleMove(u);

   183

			u->x_pos = x;

   184

			u->y_pos = y;

   185

			u->z_pos = z + 5;

   186

			VehiclePositionChanged(u);

   187

			EndVehicleMove(u);

   188

		}

   189

	}

   190

}

   191

   192

/**

   193

 * Zeppeliner handling, v->current_order.dest states:

   194

 * 0: Zeppeliner initialization has found a small airport, go there and crash

   195

 * 1: Create crash and animate falling down for extra dramatic effect

   196

 * 2: Create more smoke and leave debris on ground

   197

 * 2: Clear the runway after some time and remove crashed zeppeliner

   198

 * If not airport was found, only state 0 is reached until zeppeliner leaves map

   199

 */

   200

static void DisasterTick_Zeppeliner(Vehicle *v)

   201

{

   202

	Station *st;

   203

	int x, y;

   204

	byte z;

   205

	TileIndex tile;

   206

   207

	v->tick_counter++;

   208

   209

	if (v->current_order.dest < 2) {

   210

		if (HASBIT(v->tick_counter, 0)) return;

   211

   212

		GetNewVehiclePosResult gp = GetNewVehiclePos(v);

   213

   214

		SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);

   215

   216

		if (v->current_order.dest == 1) {

   217

			if (++v->age == 38) {

   218

				v->current_order.dest = 2;

   219

				v->age = 0;

   220

			}

   221

   222

			if (GB(v->tick_counter, 0, 3) == 0) CreateEffectVehicleRel(v, 0, -17, 2, EV_SMOKE);

   223

   224

		} else if (v->current_order.dest == 0) {

   225

			tile = v->tile;

   226

   227

			if (IsValidTile(tile) &&

   228

					IsTileType(tile, MP_STATION) &&

   229

					IsAirport(tile) &&

   230

					IsHumanPlayer(GetTileOwner(tile))) {

   231

				v->current_order.dest = 1;

   232

				v->age = 0;

   233

   234

				SetDParam(0, GetStationIndex(tile));

   235

				AddNewsItem(STR_B000_ZEPPELIN_DISASTER_AT,

   237

					v->index,

   238

					0);

   239

			}

   240

		}

   241

   242

		if (v->y_pos >= ((int)MapSizeY() + 9) * TILE_SIZE - 1) DeleteDisasterVeh(v);

   243

		return;

   244

	}

   245

   246

	if (v->current_order.dest > 2) {

   247

		if (++v->age <= 13320) return;

   248

   249

		tile = v->tile;

   250

   251

		if (IsValidTile(tile) &&

   252

				IsTileType(tile, MP_STATION) &&

   253

				IsAirport(tile) &&

   254

				IsHumanPlayer(GetTileOwner(tile))) {

   255

			st = GetStationByTile(tile);

   256

			CLRBITS(st->airport_flags, RUNWAY_IN_block);

   257

		}

   258

   259

		SetDisasterVehiclePos(v, v->x_pos, v->y_pos, v->z_pos);

   260

		DeleteDisasterVeh(v);

   261

		return;

   262

	}

   263

   264

	x = v->x_pos;

   265

	y = v->y_pos;

   267

	if (z < v->z_pos) z = v->z_pos - 1;

   268

	SetDisasterVehiclePos(v, x, y, z);

   269

   270

	if (++v->age == 1) {

   271

		CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);

   272

		SndPlayVehicleFx(SND_12_EXPLOSION, v);

   273

		v->u.disaster.image_override = SPR_BLIMP_CRASHING;

   274

	} else if (v->age == 70) {

   275

		v->u.disaster.image_override = SPR_BLIMP_CRASHED;

   276

	} else if (v->age <= 300) {

   277

		if (GB(v->tick_counter, 0, 3) == 0) {

   278

			uint32 r = Random();

   279

   280

			CreateEffectVehicleRel(v,

   281

				GB(r, 0, 4) - 7,

   282

				GB(r, 4, 4) - 7,

   283

				GB(r, 8, 3) + 5,

   284

				EV_EXPLOSION_SMALL);

   285

		}

   286

	} else if (v->age == 350) {

   287

		v->current_order.dest = 3;

   288

		v->age = 0;

   289

	}

   290

   291

	tile = v->tile;

   292

	if (IsValidTile(tile) &&

   293

			IsTileType(tile, MP_STATION) &&

   294

			IsAirport(tile) &&

   295

			IsHumanPlayer(GetTileOwner(tile))) {

   296

		st = GetStationByTile(tile);

   297

		SETBITS(st->airport_flags, RUNWAY_IN_block);

   298

	}

   299

}

   300

   301

/**

   302

 * (Small) Ufo handling, v->current_order.dest states:

   303

 * 0: Fly around to the middle of the map, then randomly, after a while target a road vehicle

   304

 * 1: Home in on a road vehicle and crash it >:)

   305

 * If not road vehicle was found, only state 0 is used and Ufo disappears after a while

   306

 */

   307

static void DisasterTick_Ufo(Vehicle *v)

   308

{

   309

	Vehicle *u;

   310

	uint dist;

   311

	byte z;

   312

   313

	v->u.disaster.image_override = (HASBIT(++v->tick_counter, 3)) ? SPR_UFO_SMALL_SCOUT_DARKER : SPR_UFO_SMALL_SCOUT;

   314

   315

	if (v->current_order.dest == 0) {

   316

		/* Fly around randomly */

   317

		int x = TileX(v->dest_tile) * TILE_SIZE;

   318

		int y = TileY(v->dest_tile) * TILE_SIZE;

   319

		if (delta(x, v->x_pos) + delta(y, v->y_pos) >= TILE_SIZE) {

   320

			v->direction = GetDirectionTowards(v, x, y);

   321

			GetNewVehiclePosResult gp = GetNewVehiclePos(v);

   322

			SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);

   323

			return;

   324

		}

   325

		if (++v->age < 6) {

   326

			v->dest_tile = RandomTile();

   327

			return;

   328

		}

   329

		v->current_order.dest = 1;

   330

   331

		FOR_ALL_VEHICLES(u) {

   332

			if (u->type == VEH_ROAD && IsHumanPlayer(u->owner)) {

   333

				v->dest_tile = u->index;

   334

				v->age = 0;

   335

				return;

   336

			}

   337

		}

   338

   339

		DeleteDisasterVeh(v);

   340

	} else {

   341

		/* Target a vehicle */

   342

		u = GetVehicle(v->dest_tile);

   343

		if (u->type != VEH_ROAD) {

   344

			DeleteDisasterVeh(v);

   345

			return;

   346

		}

   347

   348

		dist = delta(v->x_pos, u->x_pos) + delta(v->y_pos, u->y_pos);

   349

   350

		if (dist < TILE_SIZE && !(u->vehstatus & VS_HIDDEN) && u->breakdown_ctr == 0) {

   351

			u->breakdown_ctr = 3;

   352

			u->breakdown_delay = 140;

   353

		}

   354

   355

		v->direction = GetDirectionTowards(v, u->x_pos, u->y_pos);

   356

		GetNewVehiclePosResult gp = GetNewVehiclePos(v);

   357

   358

		z = v->z_pos;

   359

		if (dist <= TILE_SIZE && z > u->z_pos) z--;

   360

		SetDisasterVehiclePos(v, gp.x, gp.y, z);

   361

   363

			v->age++;

   364

			if (u->u.road.crashed_ctr == 0) {

   365

				u->u.road.crashed_ctr++;

   366

				u->vehstatus |= VS_CRASHED;

   367

   368

				AddNewsItem(STR_B001_ROAD_VEHICLE_DESTROYED,

   370

					u->index,

   371

					0);

   372

			}

   373

		}

   374

   375

		/* Destroy? */

   376

		if (v->age > 50) {

   377

			CreateEffectVehicleRel(v, 0, 7, 8, EV_EXPLOSION_LARGE);

   378

			SndPlayVehicleFx(SND_12_EXPLOSION, v);

   379

			DeleteDisasterVeh(v);

   380

		}

   381

	}

   382

}

   383

   384

static void DestructIndustry(Industry *i)

   385

{

   386

	TileIndex tile;

   387

   388

	for (tile = 0; tile != MapSize(); tile++) {

   389

		if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == i->index) {

   390

			ResetIndustryConstructionStage(tile);

   391

			MarkTileDirtyByTile(tile);

   392

		}

   393

	}

   394

}

   395

   396

/**

   397

 * Airplane handling, v->current_order.dest states:

   398

 * 0: Fly towards the targetted oil refinery

   399

 * 1: If within 15 tiles, fire away rockets and destroy industry

   400

 * 2: Refinery explosions

   401

 * 3: Fly out of the map

   402

 * If the industry was removed in the meantime just fly to the end of the map

   403

 */

   404

static void DisasterTick_Airplane(Vehicle *v)

   405

{

   406

	v->tick_counter++;

   407

	v->u.disaster.image_override =

   408

		(v->current_order.dest == 1 && HASBIT(v->tick_counter, 2)) ? SPR_F_15_FIRING : 0;

   409

   410

	GetNewVehiclePosResult gp = GetNewVehiclePos(v);

   411

	SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);

   412

   413

	if (gp.x < (-10 * TILE_SIZE)) {

   414

		DeleteDisasterVeh(v);

   415

		return;

   416

	}

   417

   418

	if (v->current_order.dest == 2) {

   419

		if (GB(v->tick_counter, 0, 2) == 0) {

   420

			Industry *i = GetIndustry(v->dest_tile);

   421

			int x = TileX(i->xy) * TILE_SIZE;

   422

			int y = TileY(i->xy) * TILE_SIZE;

   423

			uint32 r = Random();

   424

   425

			CreateEffectVehicleAbove(

   426

				GB(r,  0, 6) + x,

   427

				GB(r,  6, 6) + y,

   428

				GB(r, 12, 4),

   429

				EV_EXPLOSION_SMALL);

   430

   431

			if (++v->age >= 55) v->current_order.dest = 3;

   432

		}

   433

	} else if (v->current_order.dest == 1) {

   434

		if (++v->age == 112) {

   435

			Industry *i;

   436

   437

			v->current_order.dest = 2;

   438

			v->age = 0;

   439

   440

			i = GetIndustry(v->dest_tile);

   441

			DestructIndustry(i);

   442

   443

			SetDParam(0, i->town->index);

   445

			SndPlayTileFx(SND_12_EXPLOSION, i->xy);

   446

		}

   447

	} else if (v->current_order.dest == 0) {

   448

		int x, y;

   449

		TileIndex tile;

   450

		uint ind;

   451

   452

		x = v->x_pos - (15 * TILE_SIZE);

   453

		y = v->y_pos;

   454

   455

		if ( (uint)x > MapMaxX() * TILE_SIZE - 1) return;

   456

   457

		tile = TileVirtXY(x, y);

   458

		if (!IsTileType(tile, MP_INDUSTRY)) return;

   459

   460

		ind = GetIndustryIndex(tile);

   461

		v->dest_tile = ind;

   462

   463

		if (GetIndustrySpec(GetIndustry(ind)->type)->behaviour & INDUSTRYBEH_AIRPLANE_ATTACKS) {

   464

			v->current_order.dest = 1;

   465

			v->age = 0;

   466

		}

   467

	}

   468

}

   469

   470

/**

   471

 * Helicopter handling, v->current_order.dest states:

   472

 * 0: Fly towards the targetted factory

   473

 * 1: If within 15 tiles, fire away rockets and destroy industry

   474

 * 2: Factory explosions

   475

 * 3: Fly out of the map

   476

 */

   477

static void DisasterTick_Helicopter(Vehicle *v)

   478

{

   479

	v->tick_counter++;

   480

	v->u.disaster.image_override =

   481

		(v->current_order.dest == 1 && HASBIT(v->tick_counter, 2)) ? SPR_AH_64A_FIRING : 0;

   482

   483

	GetNewVehiclePosResult gp = GetNewVehiclePos(v);

   484

	SetDisasterVehiclePos(v, gp.x, gp.y, v->z_pos);

   485

   486

	if (gp.x > (int)MapSizeX() * TILE_SIZE + 9 * TILE_SIZE - 1) {

   487

		DeleteDisasterVeh(v);

   488

		return;

   489

	}

   490

   491

	if (v->current_order.dest == 2) {

   492

		if (GB(v->tick_counter, 0, 2) == 0) {

   493

			Industry *i = GetIndustry(v->dest_tile);

   494

			int x = TileX(i->xy) * TILE_SIZE;

   495

			int y = TileY(i->xy) * TILE_SIZE;

   496

			uint32 r = Random();