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

	byte 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 (_current_player >= MAX_PLAYERS) 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) {

    55

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

    56

	}

    57

    58

	if (_cheats.magic_bulldozer.value) return true;

    59

    60

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

    61

	n = 0;

    62

	present = GetAnyRoadBits(tile);

    63

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

    64

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

    65

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

    66

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

    67

    68

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

    69

	// then allow it

    70

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

    71

		Town *t;

    72

		*edge_road = false;

    73

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

    74

		if (_patches.extra_dynamite) return true;

    75

    76

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    77

    78

		SetDParam(0, t->index);

    79

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    80

		return false;

    81

	}

    82

    83

	return true;

    84

}

    85

    86

    87

/** Delete a piece of road.

    88

 * @param tile tile where to remove road from

    89

 * @param p1 road piece flags

    90

 * @param p2 unused

    91

 */

    92

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

    93

{

    94

	// cost for removing inner/edge -roads

    95

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

    96

    97

	PlayerID owner;

    98

	Town *t;

    99

	/* true if the roadpiece was always removeable,

   100

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

   101

	bool edge_road;

   102

	RoadBits pieces;

   103

   104

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   105

   106

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

   107

	if (p1 >> 4) return CMD_ERROR;

   108

	pieces = p1;

   109

   110

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

   111

   112

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

   113

   114

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

   115

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

   116

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   117

		} else {

   118

			t = GetTownByTile(tile);

   119

		}

   120

	} else {

   121

		t = NULL;

   122

	}

   123

   124

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

   125

   126

	switch (GetTileType(tile)) {

   127

		case MP_TUNNELBRIDGE:

   128

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   129

   130

			if (!IsBridge(tile) ||

   131

					!IsBridgeMiddle(tile) ||

   132

					!IsTransportUnderBridge(tile) ||

   133

					GetTransportTypeUnderBridge(tile) != TRANSPORT_ROAD ||

   134

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

   135

				return CMD_ERROR;

   136

			}

   137

   138

			if (flags & DC_EXEC) {

   139

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

   140

				SetClearUnderBridge(tile);

   141

				MarkTileDirtyByTile(tile);

   142

			}

   143

			return _price.remove_road * 2;

   144

   145

		case MP_STREET:

   146

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   147

   148

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

   149

			// removal allowance depends on difficulty setting

   150

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

   151

   152

			switch (GetRoadTileType(tile)) {

   153

				case ROAD_TILE_NORMAL: {

   154

					RoadBits present = GetRoadBits(tile);

   155

					RoadBits c = pieces;

   156

   157

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

   158

   159

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

   160

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

   161

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

   162

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

   163

					}

   164

   165

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

   166

					c &= present;

   167

					if (c == 0) return CMD_ERROR;

   168

   169

					if (flags & DC_EXEC) {

   170

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

   171

   172

						present ^= c;

   173

						if (present == 0) {

   174

							DoClearSquare(tile);

   175

						} else {

   176

							SetRoadBits(tile, present);

   177

							MarkTileDirtyByTile(tile);

   178

						}

   179

					}

   180

					return CountRoadBits(c) * _price.remove_road;

   181

				}

   182

   183

				case ROAD_TILE_CROSSING: {

   184

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

   185

						return CMD_ERROR;

   186

					}

   187

   188

					if (flags & DC_EXEC) {

   189

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

   190

   191

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

   192

						MarkTileDirtyByTile(tile);

   193

					}

   194

					return _price.remove_road * 2;

   195

				}

   196

   197

				default:

   198

				case ROAD_TILE_DEPOT:

   199

					return CMD_ERROR;

   200

			}

   201

   202

		default: return CMD_ERROR;

   203

	}

   204

}

   205

   206

   207

static const RoadBits _valid_tileh_slopes_road[][15] = {

   208

	// set of normal ones

   209

	{

   210

		ROAD_ALL, 0, 0,

   211

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

   212

		ROAD_Y,   0, 0,

   213

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

   214

		ROAD_X,   0, 0

   215

	},

   216

	// allowed road for an evenly raised platform

   217

	{

   218

		0,

   219

		ROAD_SW | ROAD_NW,

   220

		ROAD_SW | ROAD_SE,

   221

		ROAD_Y  | ROAD_SW,

   222

   223

		ROAD_SE | ROAD_NE, // 4

   224

		ROAD_ALL,

   225

		ROAD_X  | ROAD_SE,

   226

		ROAD_ALL,

   227

   228

		ROAD_NW | ROAD_NE, // 8

   229

		ROAD_X  | ROAD_NW,

   230

		ROAD_ALL,

   231

		ROAD_ALL,

   232

   233

		ROAD_Y  | ROAD_NE, // 12

   234

		ROAD_ALL,

   235

		ROAD_ALL

   236

	},

   237

};

   238

   239

   240

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

   241

{

   242

	RoadBits road_bits;

   243

   244

	if (IsSteepSlope(tileh)) {

   245

		if (existing == 0) {

   246

			// force full pieces.

   247

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

   248

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

   249

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

   250

		}

   251

		return CMD_ERROR;

   252

	}

   253

	road_bits = *pieces | existing;

   254

   255

	// no special foundation

   256

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

   257

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

   258

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

   259

		return 0; // no extra cost

   260

	}

   261

   262

	// foundation is used. Whole tile is leveled up

   263

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

   264

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

   265

	}

   266

   267

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

   268

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

   269

		// force full pieces.

   270

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

   271

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

   272

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

   273

	}

   274

	return CMD_ERROR;

   275

}

   276

   277

/** Build a piece of road.

   278

 * @param tile tile where to build road

   279

 * @param p1 road piece flags

   280

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

   281

 */

   282

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

   283

{

   284

	int32 cost = 0;

   285

	int32 ret;

   286

	RoadBits existing = 0;

   287

	RoadBits pieces;

   288

	Slope tileh;

   289

   290

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   291

   292

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

   293

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

   294

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

   295

	pieces = p1;

   296

   297

	tileh = GetTileSlope(tile, NULL);

   298

   299

	switch (GetTileType(tile)) {

   300

		case MP_STREET:

   301

			switch (GetRoadTileType(tile)) {

   302

				case ROAD_TILE_NORMAL:

   303

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

   304

   305

					existing = GetRoadBits(tile);

   306

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

   307

						return_cmd_error(STR_1007_ALREADY_BUILT);

   308

					}

   309

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   310

					break;

   311

   312

				case ROAD_TILE_CROSSING:

   313

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

   314

						return_cmd_error(STR_1007_ALREADY_BUILT);

   315

					}

   316

					goto do_clear;

   317

   318

				default:

   319

				case ROAD_TILE_DEPOT:

   320

					goto do_clear;

   321

			}

   322

			break;

   323

   324

		case MP_RAILWAY: {

   325

			Axis roaddir;

   326

   327

			if (IsSteepSlope(tileh)) {

   328

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   329

			}

   330

   331

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

   332

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

   333

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

   334

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   335

			}

   336

#undef M

   337

   338

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

   339

			switch (GetTrackBits(tile)) {

   340

				case TRACK_BIT_X:

   341

					if (pieces & ROAD_X) goto do_clear;

   342

					roaddir = AXIS_Y;

   343

					break;

   344

   345

				case TRACK_BIT_Y:

   346

					if (pieces & ROAD_Y) goto do_clear;

   347

					roaddir = AXIS_X;

   348

					break;

   349

   350

				default: goto do_clear;

   351

			}

   352

   353

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   354

   355

			if (flags & DC_EXEC) {

   356

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

   357

				MarkTileDirtyByTile(tile);

   358

			}

   359

			return _price.build_road * 2;

   360

		}

   361

   362

		case MP_TUNNELBRIDGE:

   363

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

   364

   365

			/* only allow roads pertendicular to bridge */

   366

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

   367

				goto do_clear;

   368

			}

   369

   370

			/* check if clear land under bridge */

   371

			if (IsTransportUnderBridge(tile)) {

   372

				switch (GetTransportTypeUnderBridge(tile)) {

   373

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   374

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   375

				}

   376

			} else {

   377

				if (IsWaterUnderBridge(tile)) {

   378

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   379

				}

   380

			}

   381

   382

			if (flags & DC_EXEC) {

   383

				SetRoadUnderBridge(tile, _current_player);

   384

				MarkTileDirtyByTile(tile);

   385

			}

   386

			return _price.build_road * 2;

   387

   388

		default:

   389

do_clear:;

   390

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

   391

			if (CmdFailed(ret)) return ret;

   392

			cost += ret;

   393

	}

   394

   395

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

   396

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

   397

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

   398

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

   399

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   400

   401

	cost += ret;

   402

   403

	if (IsTileType(tile, MP_STREET)) {

   404

		// Don't put the pieces that already exist

   405

		pieces &= ComplementRoadBits(existing);

   406

	}

   407

   408

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

   409

   410

	if (flags & DC_EXEC) {

   411

		if (IsTileType(tile, MP_STREET)) {

   412

			SetRoadBits(tile, existing | pieces);

   413

		} else {

   414

			MakeRoadNormal(tile, _current_player, pieces, p2);

   415

		}

   416

   417

		MarkTileDirtyByTile(tile);

   418

	}

   419

	return cost;

   420

}

   421

   422

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

   423

{

   424

	// not a railroad crossing?

   425

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   426

   427

	// not owned by me?

   428

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

   429

   430

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

   431

   432

	if (exec) {

   433

		SetRailTypeCrossing(tile, totype);

   434

		MarkTileDirtyByTile(tile);

   435

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

   436

	}

   437

   438

	return _price.build_rail >> 1;

   439

}

   440

   441

   442

/** Build a long piece of road.

   443

 * @param end_tile end tile of drag

   444

 * @param p1 start tile of drag

   445

 * @param p2 various bitstuffed elements

   446

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

   447

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

   448

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

   449

 */

   450

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

   451

{

   452

	TileIndex start_tile, tile;

   453

	int32 cost, ret;

   454

   455

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   456

   457

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

   458

   459

	start_tile = p1;

   460

   461

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

   462

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

   463

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

   464

   465

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

   466

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

   467

		TileIndex t = start_tile;

   468

		start_tile = end_tile;

   469

		end_tile = t;

   470

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

   471

	}

   472

   473

	cost = 0;

   474

	tile = start_tile;

   475

	// Start tile is the small number.

   476

	for (;;) {

   477

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

   478

   479

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

   480

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

   481

   482

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

   483

		if (CmdFailed(ret)) {

   484

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   485

			_error_message = INVALID_STRING_ID;

   486

		} else {

   487

			cost += ret;

   488

		}

   489

   490

		if (tile == end_tile) break;