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

    26

static uint CountRoadBits(RoadBits r)

    27

{

    28

	uint count = 0;

    29

    30

	if (r & ROAD_NW) ++count;

    31

	if (r & ROAD_SW) ++count;

    32

	if (r & ROAD_SE) ++count;

    33

	if (r & ROAD_NE) ++count;

    34

	return count;

    35

}

    36

    37

    38

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

    39

{

    40

	RoadBits present;

    41

	RoadBits n;

    42

	Owner owner;

    43

	*edge_road = true;

    44

    45

	if (_game_mode == GM_EDITOR) return true;

    46

    47

	// Only do the special processing for actual players.

    48

	if (!IsValidPlayer(_current_player)) return true;

    49

    50

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

    51

    52

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

    53

	// by a town

    54

	if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);

    55

    56

	if (_cheats.magic_bulldozer.value) return true;

    57

    58

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

    59

	n = 0;

    60

	present = GetAnyRoadBits(tile);

    61

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

    62

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

    63

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

    64

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

    65

    66

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

    67

	// then allow it

    68

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

    69

		Town *t;

    70

		*edge_road = false;

    71

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

    72

		if (_patches.extra_dynamite) return true;

    73

    74

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    75

    76

		SetDParam(0, t->index);

    77

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    78

		return false;

    79

	}

    80

    81

	return true;

    82

}

    83

    84

    85

/** Delete a piece of road.

    86

 * @param tile tile where to remove road from

    87

 * @param p1 road piece flags

    88

 * @param p2 unused

    89

 */

    90

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

    91

{

    92

	// cost for removing inner/edge -roads

    93

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

    94

    95

	Owner owner;

    96

	Town *t;

    97

	/* true if the roadpiece was always removeable,

    98

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

    99

	bool edge_road;

   100

	RoadBits pieces;

   101

   102

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   103

   104

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

   105

	if (p1 >> 4) return CMD_ERROR;

   106

	pieces = p1;

   107

   108

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

   109

   110

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

   111

   112

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

   113

		/* Are we removing a piece of road below a bridge, or not. If below

   114

		 * a bridge we need to calculate the town's index as it is not saved

   115

		 * in the map array (no space) */

   116

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   117

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   118

		} else {

   119

			t = GetTownByTile(tile);

   120

		}

   121

	} else {

   122

		t = NULL;

   123

	}

   124

   125

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

   126

   127

	switch (GetTileType(tile)) {

   128

		case MP_TUNNELBRIDGE:

   129

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   130

   131

			if (!IsBridge(tile) ||

   132

					!IsBridgeMiddle(tile) ||

   133

					!IsTransportUnderBridge(tile) ||

   134

					GetTransportTypeUnderBridge(tile) != TRANSPORT_ROAD ||

   135

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

   136

				return CMD_ERROR;

   137

			}

   138

   139

			if (flags & DC_EXEC) {

   140

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

   141

				SetClearUnderBridge(tile);

   142

				MarkTileDirtyByTile(tile);

   143

			}

   144

			return _price.remove_road * 2;

   145

   146

		case MP_STREET:

   147

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   148

   149

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

   150

			// removal allowance depends on difficulty setting

   151

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

   152

   153

			switch (GetRoadTileType(tile)) {

   154

				case ROAD_TILE_NORMAL: {

   155

					RoadBits present = GetRoadBits(tile);

   156

					RoadBits c = pieces;

   157

   158

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

   159

   160

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

   161

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

   162

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

   163

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

   164

					}

   165

   166

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

   167

					c &= present;

   168

					if (c == 0) return CMD_ERROR;

   169

   170

					if (flags & DC_EXEC) {

   171

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

   172

   173

						present ^= c;

   174

						if (present == 0) {

   175

							DoClearSquare(tile);

   176

						} else {

   177

							SetRoadBits(tile, present);

   178

							MarkTileDirtyByTile(tile);

   179

						}

   180

					}

   181

					return CountRoadBits(c) * _price.remove_road;

   182

				}

   183

   184

				case ROAD_TILE_CROSSING: {

   185

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

   186

						return CMD_ERROR;

   187

					}

   188

   189

					if (flags & DC_EXEC) {

   190

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

   191

   192

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

   193

						MarkTileDirtyByTile(tile);

   194

					}

   195

					return _price.remove_road * 2;

   196

				}

   197

   198

				default:

   199

				case ROAD_TILE_DEPOT:

   200

					return CMD_ERROR;

   201

			}

   202

   203

		default: return CMD_ERROR;

   204

	}

   205

}

   206

   207

   208

static const RoadBits _valid_tileh_slopes_road[][15] = {

   209

	// set of normal ones

   210

	{

   211

		ROAD_ALL, 0, 0,

   212

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

   213

		ROAD_Y,   0, 0,

   214

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

   215

		ROAD_X,   0, 0

   216

	},

   217

	// allowed road for an evenly raised platform

   218

	{

   219

		0,

   220

		ROAD_SW | ROAD_NW,

   221

		ROAD_SW | ROAD_SE,

   222

		ROAD_Y  | ROAD_SW,

   223

   224

		ROAD_SE | ROAD_NE, // 4

   225

		ROAD_ALL,

   226

		ROAD_X  | ROAD_SE,

   227

		ROAD_ALL,

   228

   229

		ROAD_NW | ROAD_NE, // 8

   230

		ROAD_X  | ROAD_NW,

   231

		ROAD_ALL,

   232

		ROAD_ALL,

   233

   234

		ROAD_Y  | ROAD_NE, // 12

   235

		ROAD_ALL,

   236

		ROAD_ALL

   237

	},

   238

};

   239

   240

   241

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

   242

{

   243

	RoadBits road_bits;

   244

   245

	if (IsSteepSlope(tileh)) {

   246

		if (existing == 0) {

   247

			// force full pieces.

   248

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

   249

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

   250

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

   251

		}

   252

		return CMD_ERROR;

   253

	}

   254

	road_bits = *pieces | existing;

   255

   256

	// no special foundation

   257

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

   258

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

   259

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

   260

		return 0; // no extra cost

   261

	}

   262

   263

	// foundation is used. Whole tile is leveled up

   264

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

   265

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

   266

	}

   267

   268

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

   269

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

   270

		// force full pieces.

   271

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

   272

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

   273

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

   274

	}

   275

	return CMD_ERROR;

   276

}

   277

   278

/** Build a piece of road.

   279

 * @param tile tile where to build road

   280

 * @param p1 road piece flags

   281

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

   282

 */

   283

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

   284

{

   285

	int32 cost = 0;

   286

	int32 ret;

   287

	RoadBits existing = 0;

   288

	RoadBits pieces;

   289

	Slope tileh;

   290

   291

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   292

   293

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

   294

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

   295

	if ((p1 >> 4) || (IsValidPlayer(_current_player) && p2 != 0) || !IsValidTownID(p2)) return CMD_ERROR;

   296

	pieces = p1;

   297

   298

	tileh = GetTileSlope(tile, NULL);

   299

   300

	switch (GetTileType(tile)) {

   301

		case MP_STREET:

   302

			switch (GetRoadTileType(tile)) {

   303

				case ROAD_TILE_NORMAL:

   304

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

   305

   306

					existing = GetRoadBits(tile);

   307

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

   308

						return_cmd_error(STR_1007_ALREADY_BUILT);

   309

					}

   310

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   311

					break;

   312

   313

				case ROAD_TILE_CROSSING:

   314

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

   315

						return_cmd_error(STR_1007_ALREADY_BUILT);

   316

					}

   317

					goto do_clear;

   318

   319

				default:

   320

				case ROAD_TILE_DEPOT:

   321

					goto do_clear;

   322

			}

   323

			break;

   324

   325

		case MP_RAILWAY: {

   326

			Axis roaddir;

   327

   328

			if (IsSteepSlope(tileh)) {

   329

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   330

			}

   331

   332

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

   333

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

   334

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

   335

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   336

			}

   337

#undef M

   338

   339

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

   340

			switch (GetTrackBits(tile)) {

   341

				case TRACK_BIT_X:

   342

					if (pieces & ROAD_X) goto do_clear;

   343

					roaddir = AXIS_Y;

   344

					break;

   345

   346

				case TRACK_BIT_Y:

   347

					if (pieces & ROAD_Y) goto do_clear;

   348

					roaddir = AXIS_X;

   349

					break;

   350

   351

				default: goto do_clear;

   352

			}

   353

   354

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   355

   356

			if (flags & DC_EXEC) {

   357

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

   358

				MarkTileDirtyByTile(tile);

   359

			}

   360

			return _price.build_road * 2;

   361

		}

   362

   363

		case MP_TUNNELBRIDGE:

   364

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

   365

   366

			/* only allow roads pertendicular to bridge */

   367

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

   368

				goto do_clear;

   369

			}

   370

   371

			/* check if clear land under bridge */

   372

			if (IsTransportUnderBridge(tile)) {

   373

				switch (GetTransportTypeUnderBridge(tile)) {

   374

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   375

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   376

				}

   377

			} else {

   378

				if (IsWaterUnderBridge(tile)) {

   379

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   380

				}

   381

			}

   382

   383

			if (flags & DC_EXEC) {

   384

				SetRoadUnderBridge(tile, _current_player);

   385

				MarkTileDirtyByTile(tile);

   386

			}

   387

			return _price.build_road * 2;

   388

   389

		default:

   390

do_clear:;

   391

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

   392

			if (CmdFailed(ret)) return ret;

   393

			cost += ret;

   394

	}

   395

   396

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

   397

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

   398

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

   399

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

   400

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   401

   402

	cost += ret;

   403

   404

	if (IsTileType(tile, MP_STREET)) {

   405

		// Don't put the pieces that already exist

   406

		pieces &= ComplementRoadBits(existing);

   407

	}

   408

   409

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

   410

   411

	if (flags & DC_EXEC) {

   412

		if (IsTileType(tile, MP_STREET)) {

   413

			SetRoadBits(tile, existing | pieces);

   414

		} else {

   415

			MakeRoadNormal(tile, _current_player, pieces, p2);

   416

		}

   417

   418

		MarkTileDirtyByTile(tile);

   419

	}

   420

	return cost;

   421

}

   422

   423

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

   424

{

   425

	// not a railroad crossing?

   426

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   427

   428

	// not owned by me?

   429

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

   430

   431

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

   432

   433

	// 'hidden' elrails can't be downgraded to normal rail when elrails are disabled

   434

	if (_patches.disable_elrails && totype == RAILTYPE_RAIL && GetRailTypeCrossing(tile) == RAILTYPE_ELECTRIC) return CMD_ERROR;

   435

   436

	if (exec) {

   437

		SetRailTypeCrossing(tile, totype);

   438

		MarkTileDirtyByTile(tile);

   439

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

   440

	}

   441

   442

	return _price.build_rail >> 1;

   443

}

   444

   445

   446

/** Build a long piece of road.

   447

 * @param end_tile end tile of drag

   448

 * @param p1 start tile of drag

   449

 * @param p2 various bitstuffed elements

   450

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

   451

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

   452

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

   453

 */

   454

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

   455

{

   456

	TileIndex start_tile, tile;

   457

	int32 cost, ret;

   458

   459

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   460

   461

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

   462

   463

	start_tile = p1;

   464

   465

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

   466

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

   467

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

   468

   469

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

   470

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

   471

		TileIndex t = start_tile;

   472

		start_tile = end_tile;

   473

		end_tile = t;

   474

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

   475

	}

   476

   477

	cost = 0;

   478

	tile = start_tile;

   479

	// Start tile is the small number.

   480

	for (;;) {

   481

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

   482

   483

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

   484

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

   485

   486

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

   487

		if (CmdFailed(ret)) {

   488

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   489

			_error_message = INVALID_STRING_ID;

   490

		} else {