1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

     6

#include "rail_map.h"

     7

#include "road_map.h"

     8

#include "sprite.h"

     9

#include "table/sprites.h"

    10

#include "table/strings.h"

    11

#include "functions.h"

    12

#include "map.h"

    13

#include "tile.h"

    14

#include "town_map.h"

    15

#include "vehicle.h"

    16

#include "viewport.h"

    17

#include "command.h"

    18

#include "player.h"

    19

#include "town.h"

    20

#include "gfx.h"

    21

#include "sound.h"

    22

#include "yapf/yapf.h"

    23

#include "depot.h"

    24

    25

void RoadVehEnterDepot(Vehicle *v);

    26

    27

    28

static uint CountRoadBits(RoadBits r)

    29

{

    30

	uint count = 0;

    31

    32

	if (r & ROAD_NW) ++count;

    33

	if (r & ROAD_SW) ++count;

    34

	if (r & ROAD_SE) ++count;

    35

	if (r & ROAD_NE) ++count;

    36

	return count;

    37

}

    38

    39

    40

static bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, bool* edge_road)

    41

{

    42

	RoadBits present;

    43

	RoadBits n;

    44

	byte owner;

    45

	*edge_road = true;

    46

    47

	if (_game_mode == GM_EDITOR) return true;

    48

    49

	// Only do the special processing for actual players.

    50

	if (_current_player >= MAX_PLAYERS) return true;

    51

    52

	owner = IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);

    53

    54

	// Only do the special processing if the road is owned

    55

	// by a town

    56

	if (owner != OWNER_TOWN) {

    57

		return owner == OWNER_NONE || CheckOwnership(owner);

    58

	}

    59

    60

	if (_cheats.magic_bulldozer.value) return true;

    61

    62

	// Get a bitmask of which neighbouring roads has a tile

    63

	n = 0;

    64

	present = GetAnyRoadBits(tile);

    65

	if (present & ROAD_NE && GetAnyRoadBits(TILE_ADDXY(tile,-1, 0)) & ROAD_SW) n |= ROAD_NE;

    66

	if (present & ROAD_SE && GetAnyRoadBits(TILE_ADDXY(tile, 0, 1)) & ROAD_NW) n |= ROAD_SE;

    67

	if (present & ROAD_SW && GetAnyRoadBits(TILE_ADDXY(tile, 1, 0)) & ROAD_NE) n |= ROAD_SW;

    68

	if (present & ROAD_NW && GetAnyRoadBits(TILE_ADDXY(tile, 0,-1)) & ROAD_SE) n |= ROAD_NW;

    69

    70

	// If 0 or 1 bits are set in n, or if no bits that match the bits to remove,

    71

	// then allow it

    72

	if ((n & (n - 1)) != 0 && (n & remove) != 0) {

    73

		Town *t;

    74

		*edge_road = false;

    75

		// you can remove all kind of roads with extra dynamite

    76

		if (_patches.extra_dynamite) return true;

    77

    78

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    79

    80

		SetDParam(0, t->index);

    81

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    82

		return false;

    83

	}

    84

    85

	return true;

    86

}

    87

    88

    89

/** Delete a piece of road.

    90

 * @param tile tile where to remove road from

    91

 * @param p1 road piece flags

    92

 * @param p2 unused

    93

 */

    94

int32 CmdRemoveRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

    95

{

    96

	// cost for removing inner/edge -roads

    97

	static const uint16 road_remove_cost[2] = {50, 18};

    98

    99

	PlayerID owner;

   100

	Town *t;

   101

	/* true if the roadpiece was always removeable,

   102

	 * false if it was a center piece. Affects town ratings drop */

   103

	bool edge_road;

   104

	RoadBits pieces;

   105

   106

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   107

   108

	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) */

   109

	if (p1 >> 4) return CMD_ERROR;

   110

	pieces = p1;

   111

   112

	if (!IsTileType(tile, MP_STREET) && !IsTileType(tile, MP_TUNNELBRIDGE)) return CMD_ERROR;

   113

   114

	owner = IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);

   115

   116

	if (owner == OWNER_TOWN && _game_mode != GM_EDITOR) {

   117

		if (IsTileType(tile, MP_TUNNELBRIDGE)) { // index of town is not saved for bridge (no space)

   118

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   119

		} else {

   120

			t = GetTownByTile(tile);

   121

		}

   122

	} else {

   123

		t = NULL;

   124

	}

   125

   126

	if (!CheckAllowRemoveRoad(tile, pieces, &edge_road)) return CMD_ERROR;

   127

   128

	switch (GetTileType(tile)) {

   129

		case MP_TUNNELBRIDGE:

   130

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   131

   132

			if (!IsBridge(tile) ||

   133

					!IsBridgeMiddle(tile) ||

   134

					!IsTransportUnderBridge(tile) ||

   135

					GetTransportTypeUnderBridge(tile) != TRANSPORT_ROAD ||

   136

					(pieces & ComplementRoadBits(GetRoadBitsUnderBridge(tile))) != 0) {

   137

				return CMD_ERROR;

   138

			}

   139

   140

			if (flags & DC_EXEC) {

   141

				ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);

   142

				SetClearUnderBridge(tile);

   143

				MarkTileDirtyByTile(tile);

   144

			}

   145

			return _price.remove_road * 2;

   146

   147

		case MP_STREET:

   148

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   149

   150

			// check if you're allowed to remove the street owned by a town

   151

			// removal allowance depends on difficulty setting

   152

			if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return CMD_ERROR;

   153

   154

			switch (GetRoadTileType(tile)) {

   155

				case ROAD_TILE_NORMAL: {

   156

					RoadBits present = GetRoadBits(tile);

   157

					RoadBits c = pieces;

   158

   159

					if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);

   160

   161

					if (GetTileSlope(tile, NULL) != SLOPE_FLAT &&

   162

							(present == ROAD_Y || present == ROAD_X)) {

   163

						c |= (c & 0xC) >> 2;

   164

						c |= (c & 0x3) << 2;

   165

					}

   166

   167

					// limit the bits to delete to the existing bits.

   168

					c &= present;

   169

					if (c == 0) return CMD_ERROR;

   170

   171

					if (flags & DC_EXEC) {

   172

						ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);

   173

   174

						present ^= c;

   175

						if (present == 0) {

   176

							DoClearSquare(tile);

   177

						} else {

   178

							SetRoadBits(tile, present);

   179

							MarkTileDirtyByTile(tile);

   180

						}

   181

					}

   182

					return CountRoadBits(c) * _price.remove_road;

   183

				}

   184

   185

				case ROAD_TILE_CROSSING: {

   186

					if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {

   187

						return CMD_ERROR;

   188

					}

   189

   190

					if (flags & DC_EXEC) {

   191

						ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);

   192

   193

						MakeRailNormal(tile, GetTileOwner(tile), GetCrossingRailBits(tile), GetRailTypeCrossing(tile));

   194

						MarkTileDirtyByTile(tile);

   195

					}

   196

					return _price.remove_road * 2;

   197

				}

   198

   199

				default:

   200

				case ROAD_TILE_DEPOT:

   201

					return CMD_ERROR;

   202

			}

   203

   204

		default: return CMD_ERROR;

   205

	}

   206

}

   207

   208

   209

static const RoadBits _valid_tileh_slopes_road[][15] = {

   210

	// set of normal ones

   211

	{

   212

		ROAD_ALL, 0, 0,

   213

		ROAD_X,   0, 0,  // 3, 4, 5

   214

		ROAD_Y,   0, 0,

   215

		ROAD_Y,   0, 0,  // 9, 10, 11

   216

		ROAD_X,   0, 0

   217

	},

   218

	// allowed road for an evenly raised platform

   219

	{

   220

		0,

   221

		ROAD_SW | ROAD_NW,

   222

		ROAD_SW | ROAD_SE,

   223

		ROAD_Y  | ROAD_SW,

   224

   225

		ROAD_SE | ROAD_NE, // 4

   226

		ROAD_ALL,

   227

		ROAD_X  | ROAD_SE,

   228

		ROAD_ALL,

   229

   230

		ROAD_NW | ROAD_NE, // 8

   231

		ROAD_X  | ROAD_NW,

   232

		ROAD_ALL,

   233

		ROAD_ALL,

   234

   235

		ROAD_Y  | ROAD_NE, // 12

   236

		ROAD_ALL,

   237

		ROAD_ALL

   238

	},

   239

};

   240

   241

   242

static uint32 CheckRoadSlope(Slope tileh, RoadBits* pieces, RoadBits existing)

   243

{

   244

	RoadBits road_bits;

   245

   246

	if (IsSteepSlope(tileh)) return CMD_ERROR;

   247

	road_bits = *pieces | existing;

   248

   249

	// no special foundation

   250

	if ((~_valid_tileh_slopes_road[0][tileh] & road_bits) == 0) {

   251

		// force that all bits are set when we have slopes

   252

		if (tileh != SLOPE_FLAT) *pieces |= _valid_tileh_slopes_road[0][tileh];

   253

		return 0; // no extra cost

   254

	}

   255

   256

	// foundation is used. Whole tile is leveled up

   257

	if ((~_valid_tileh_slopes_road[1][tileh] & road_bits) == 0) {

   258

		return existing != 0 ? 0 : _price.terraform;

   259

	}

   260

   261

	// partly leveled up tile, only if there's no road on that tile

   262

	if (existing == 0 && (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)) {

   263

		// force full pieces.

   264

		*pieces |= (*pieces & 0xC) >> 2;

   265

		*pieces |= (*pieces & 0x3) << 2;

   266

		if (*pieces == ROAD_X || *pieces == ROAD_Y) return _price.terraform;

   267

	}

   268

	return CMD_ERROR;

   269

}

   270

   271

/** Build a piece of road.

   272

 * @param tile tile where to build road

   273

 * @param p1 road piece flags

   274

 * @param p2 the town that is building the road (0 if not applicable)

   275

 */

   276

int32 CmdBuildRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   277

{

   278

	int32 cost = 0;

   279

	int32 ret;

   280

	RoadBits existing = 0;

   281

	RoadBits pieces;

   282

	Slope tileh;

   283

   284

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   285

   286

	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero

   287

	 * if a non-player is building the road */

   288

	if ((p1 >> 4) || (_current_player < MAX_PLAYERS && p2 != 0) || !IsTownIndex(p2)) return CMD_ERROR;

   289

	pieces = p1;

   290

   291

	tileh = GetTileSlope(tile, NULL);

   292

   293

	switch (GetTileType(tile)) {

   294

		case MP_STREET:

   295

			switch (GetRoadTileType(tile)) {

   296

				case ROAD_TILE_NORMAL:

   297

					if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);

   298

   299

					existing = GetRoadBits(tile);

   300

					if ((existing & pieces) == pieces) {

   301

						return_cmd_error(STR_1007_ALREADY_BUILT);

   302

					}

   303

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   304

					break;

   305

   306

				case ROAD_TILE_CROSSING:

   307

					if (pieces != GetCrossingRoadBits(tile)) { // XXX is this correct?

   308

						return_cmd_error(STR_1007_ALREADY_BUILT);

   309

					}

   310

					goto do_clear;

   311

   312

				default:

   313

				case ROAD_TILE_DEPOT:

   314

					goto do_clear;

   315

			}

   316

			break;

   317

   318

		case MP_RAILWAY: {

   319

			Axis roaddir;

   320

   321

			if (IsSteepSlope(tileh)) {

   322

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   323

			}

   324

   325

#define M(x) (1 << (x))

   326

			/* Level crossings may only be built on these slopes */

   327

			if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) {

   328

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   329

			}

   330

#undef M

   331

   332

			if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;

   333

			switch (GetTrackBits(tile)) {

   334

				case TRACK_BIT_X:

   335

					if (pieces & ROAD_X) goto do_clear;

   336

					roaddir = AXIS_Y;

   337

					break;

   338

   339

				case TRACK_BIT_Y:

   340

					if (pieces & ROAD_Y) goto do_clear;

   341

					roaddir = AXIS_X;

   342

					break;

   343

   344

				default: goto do_clear;

   345

			}

   346

   347

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   348

   349

			if (flags & DC_EXEC) {

   350

				MakeRoadCrossing(tile, _current_player, GetTileOwner(tile), roaddir, GetRailType(tile), p2);

   351

				MarkTileDirtyByTile(tile);

   352

			}

   353

			return _price.build_road * 2;

   354

		}

   355

   356

		case MP_TUNNELBRIDGE:

   357

			/* check for flat land */

   358

			if (IsSteepSlope(tileh)) {

   359

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   360

			}

   361

   362

			if (!IsBridge(tile) || !IsBridgeMiddle(tile)) goto do_clear;

   363

   364

			/* only allow roads pertendicular to bridge */

   365

			if ((pieces & (GetBridgeAxis(tile) == AXIS_X ? ROAD_X : ROAD_Y)) != 0) {

   366

				goto do_clear;

   367

			}

   368

   369

			/* check if clear land under bridge */

   370

			if (IsTransportUnderBridge(tile)) {

   371

				switch (GetTransportTypeUnderBridge(tile)) {

   372

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   373

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   374

				}

   375

			} else {

   376

				if (IsWaterUnderBridge(tile)) {

   377

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   378

				}

   379

			}

   380

   381

			if (flags & DC_EXEC) {

   382

				SetRoadUnderBridge(tile, _current_player);

   383

				MarkTileDirtyByTile(tile);

   384

			}

   385

			return _price.build_road * 2;

   386

   387

		default:

   388

do_clear:;

   389

			ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   390

			if (CmdFailed(ret)) return ret;

   391

			cost += ret;

   392

	}

   393

   394

	ret = CheckRoadSlope(tileh, &pieces, existing);

   395

	/* Return an error if we need to build a foundation (ret != 0) but the

   396

	 * current patch-setting is turned off (or stupid AI@work) */

   397

	if (CmdFailed(ret) || (ret != 0 && (!_patches.build_on_slopes || _is_old_ai_player)))

   398

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   399

   400

	cost += ret;

   401

   402

	if (IsTileType(tile, MP_STREET)) {

   403

		// Don't put the pieces that already exist

   404

		pieces &= ComplementRoadBits(existing);

   405

	}

   406

   407

	cost += CountRoadBits(pieces) * _price.build_road;

   408

   409

	if (flags & DC_EXEC) {

   410

		if (IsTileType(tile, MP_STREET)) {

   411

			SetRoadBits(tile, existing | pieces);

   412

		} else {

   413

			MakeRoadNormal(tile, _current_player, pieces, p2);

   414

		}

   415

   416

		MarkTileDirtyByTile(tile);

   417

	}

   418

	return cost;

   419

}

   420

   421

int32 DoConvertStreetRail(TileIndex tile, RailType totype, bool exec)

   422

{

   423

	// not a railroad crossing?

   424

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   425

   426

	// not owned by me?

   427

	if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile)) return CMD_ERROR;

   428

   429

	if (GetRailTypeCrossing(tile) == totype) return CMD_ERROR;

   430

   431

	if (exec) {

   432

		SetRailTypeCrossing(tile, totype);

   433

		MarkTileDirtyByTile(tile);

   434

		YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(GetCrossingRailBits(tile)));

   435

	}

   436

   437

	return _price.build_rail >> 1;

   438

}

   439

   440

   441

/** Build a long piece of road.

   442

 * @param end_tile end tile of drag

   443

 * @param p1 start tile of drag

   444

 * @param p2 various bitstuffed elements

   445

 * - p2 = (bit 0) - start tile starts in the 2nd half of tile (p2 & 1)

   446

 * - p2 = (bit 1) - end tile starts in the 2nd half of tile (p2 & 2)

   447

 * - p2 = (bit 2) - direction: 0 = along x-axis, 1 = along y-axis (p2 & 4)

   448

 */

   449

int32 CmdBuildLongRoad(TileIndex end_tile, uint32 flags, uint32 p1, uint32 p2)

   450

{

   451

	TileIndex start_tile, tile;

   452

	int32 cost, ret;

   453

   454

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   455

   456

	if (p1 >= MapSize()) return CMD_ERROR;

   457

   458

	start_tile = p1;

   459

   460

	/* Only drag in X or Y direction dictated by the direction variable */

   461

	if (!HASBIT(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis

   462

	if (HASBIT(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis

   463

   464

	/* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */

   465

	if (start_tile > end_tile || (start_tile == end_tile && HASBIT(p2, 0))) {

   466

		TileIndex t = start_tile;

   467

		start_tile = end_tile;

   468

		end_tile = t;

   469

		p2 ^= IS_INT_INSIDE(p2&3, 1, 3) ? 3 : 0;

   470

	}

   471

   472

	cost = 0;

   473

	tile = start_tile;

   474

	// Start tile is the small number.

   475

	for (;;) {

   476

		RoadBits bits = HASBIT(p2, 2) ? ROAD_Y : ROAD_X;

   477

   478

		if (tile == end_tile && !HASBIT(p2, 1)) bits &= ROAD_NW | ROAD_NE;

   479

		if (tile == start_tile && HASBIT(p2, 0)) bits &= ROAD_SE | ROAD_SW;

   480

   481

		ret = DoCommand(tile, bits, 0, flags, CMD_BUILD_ROAD);

   482

		if (CmdFailed(ret)) {

   483

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   484

			_error_message = INVALID_STRING_ID;

   485

		} else {

   486

			cost += ret;

   487

		}

   488

   489

		if (tile == end_tile) break;

   490

   491