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 "table/sprites.h"

     9

#include "table/strings.h"

    10

#include "functions.h"

    11

#include "map.h"

    12

#include "tile.h"

    13

#include "town_map.h"

    14

#include "vehicle.h"

    15

#include "viewport.h"

    16

#include "command.h"

    17

#include "player.h"

    18

#include "town.h"

    19

#include "gfx.h"

    20

#include "sound.h"

    21

#include "depot.h"

    22

    23

void RoadVehEnterDepot(Vehicle *v);

    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 (!EnsureNoVehicleZ(tile, TilePixelHeight(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 (GetRoadType(tile)) {

   153

				case ROAD_NORMAL: {

   154

					RoadBits present = GetRoadBits(tile);

   155

					RoadBits c = pieces;

   156

   157

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

   158

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

   159

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

   160

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

   161

					}

   162

   163

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

   164

					c &= present;

   165

					if (c == 0) return CMD_ERROR;

   166

   167

					if (flags & DC_EXEC) {

   168

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

   169

   170

						present ^= c;

   171

						if (present == 0) {

   172

							DoClearSquare(tile);

   173

						} else {

   174

							SetRoadBits(tile, present);

   175

							MarkTileDirtyByTile(tile);

   176

						}

   177

					}

   178

					return CountRoadBits(c) * _price.remove_road;

   179

				}

   180

   181

				case ROAD_CROSSING: {

   182

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

   183

						return CMD_ERROR;

   184

					}

   185

   186

					if (flags & DC_EXEC) {

   187

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

   188

   189

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

   190

						MarkTileDirtyByTile(tile);

   191

					}

   192

					return _price.remove_road * 2;

   193

				}

   194

   195

				default:

   196

				case ROAD_DEPOT:

   197

					return CMD_ERROR;

   198

			}

   199

   200

		default: return CMD_ERROR;

   201

	}

   202

}

   203

   204

   205

static const RoadBits _valid_tileh_slopes_road[][15] = {

   206

	// set of normal ones

   207

	{

   208

		ROAD_ALL, 0, 0,

   209

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

   210

		ROAD_Y,   0, 0,

   211

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

   212

		ROAD_X,   0, 0

   213

	},

   214

	// allowed road for an evenly raised platform

   215

	{

   216

		0,

   217

		ROAD_SW | ROAD_NW,

   218

		ROAD_SW | ROAD_SE,

   219

		ROAD_Y  | ROAD_SW,

   220

   221

		ROAD_SE | ROAD_NE, // 4

   222

		ROAD_ALL,

   223

		ROAD_X  | ROAD_SE,

   224

		ROAD_ALL,

   225

   226

		ROAD_NW | ROAD_NE, // 8

   227

		ROAD_X  | ROAD_NW,

   228

		ROAD_ALL,

   229

		ROAD_ALL,

   230

   231

		ROAD_Y  | ROAD_NE, // 12

   232

		ROAD_ALL,

   233

		ROAD_ALL

   234

	},

   235

};

   236

   237

   238

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

   239

{

   240

	RoadBits road_bits;

   241

   242

	if (IsSteepSlope(tileh)) return CMD_ERROR;

   243

	road_bits = *pieces | existing;

   244

   245

	// no special foundation

   246

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

   247

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

   248

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

   249

		return 0; // no extra cost

   250

	}

   251

   252

	// foundation is used. Whole tile is leveled up

   253

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

   254

		return existing ? 0 : _price.terraform;

   255

	}

   256

   257

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

   258

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

   259

		// force full pieces.

   260

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

   261

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

   262

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

   263

	}

   264

	return CMD_ERROR;

   265

}

   266

   267

/** Build a piece of road.

   268

 * @param tile tile where to build road

   269

 * @param p1 road piece flags

   270

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

   271

 */

   272

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

   273

{

   274

	int32 cost = 0;

   275

	int32 ret;

   276

	RoadBits existing = 0;

   277

	RoadBits pieces;

   278

	Slope tileh;

   279

   280

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   281

   282

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

   283

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

   284

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

   285

	pieces = p1;

   286

   287

	tileh = GetTileSlope(tile, NULL);

   288

   289

	switch (GetTileType(tile)) {

   290

		case MP_STREET:

   291

			switch (GetRoadType(tile)) {

   292

				case ROAD_NORMAL:

   293

					existing = GetRoadBits(tile);

   294

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

   295

						return_cmd_error(STR_1007_ALREADY_BUILT);

   296

					}

   297

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   298

					break;

   299

   300

				case ROAD_CROSSING:

   301

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

   302

						return_cmd_error(STR_1007_ALREADY_BUILT);

   303

					}

   304

					goto do_clear;

   305

   306

				default:

   307

				case ROAD_DEPOT:

   308

					goto do_clear;

   309

			}

   310

			break;

   311

   312

		case MP_RAILWAY: {

   313

			Axis roaddir;

   314

   315

			if (IsSteepSlope(tileh)) {

   316

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   317

			}

   318

   319

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

   320

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

   321

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

   322

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   323

			}

   324

#undef M

   325

   326

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

   327

			switch (GetTrackBits(tile)) {

   328

				case TRACK_BIT_X:

   329

					if (pieces & ROAD_X) goto do_clear;

   330

					roaddir = AXIS_Y;

   331

					break;

   332

   333

				case TRACK_BIT_Y:

   334

					if (pieces & ROAD_Y) goto do_clear;

   335

					roaddir = AXIS_X;

   336

					break;

   337

   338

				default: goto do_clear;

   339

			}

   340

   341

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   342

   343

			if (flags & DC_EXEC) {

   344

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

   345

				MarkTileDirtyByTile(tile);

   346

			}

   347

			return _price.build_road * 2;

   348

		}

   349

   350

		case MP_TUNNELBRIDGE:

   351

			/* check for flat land */

   352

			if (IsSteepSlope(tileh)) {

   353

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   354

			}

   355

   356

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

   357

   358

			/* only allow roads pertendicular to bridge */

   359

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

   360

				goto do_clear;

   361

			}

   362

   363

			/* check if clear land under bridge */

   364

			if (IsTransportUnderBridge(tile)) {

   365

				switch (GetTransportTypeUnderBridge(tile)) {

   366

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   367

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   368

				}

   369

			} else {

   370

				if (IsWaterUnderBridge(tile)) {

   371

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   372

				}

   373

			}

   374

   375

			if (flags & DC_EXEC) {

   376

				SetRoadUnderBridge(tile, _current_player);

   377

				MarkTileDirtyByTile(tile);

   378

			}

   379

			return _price.build_road * 2;

   380

   381

		default:

   382

do_clear:;

   383

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

   384

			if (CmdFailed(ret)) return ret;

   385

			cost += ret;

   386

	}

   387

   388

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

   389

	if (CmdFailed(ret)) return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   390

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

   391

		return CMD_ERROR;

   392

	}

   393

	cost += ret;

   394

   395

	if (IsTileType(tile, MP_STREET)) {

   396

		// Don't put the pieces that already exist

   397

		pieces &= ComplementRoadBits(existing);

   398

	}

   399

   400

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

   401

   402

	if (flags & DC_EXEC) {

   403

		if (IsTileType(tile, MP_STREET)) {

   404

			SetRoadBits(tile, existing | pieces);

   405

		} else {

   406

			MakeRoadNormal(tile, _current_player, pieces, p2);

   407

		}

   408

   409

		MarkTileDirtyByTile(tile);

   410

	}

   411

	return cost;

   412

}

   413

   414

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

   415

{

   416

	// not a railroad crossing?

   417

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   418

   419

	// not owned by me?

   420

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

   421

   422

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

   423

   424

	if (exec) {

   425

		SetRailTypeCrossing(tile, totype);

   426

		MarkTileDirtyByTile(tile);

   427

	}

   428

   429

	return _price.build_rail >> 1;

   430

}

   431

   432

   433

/** Build a long piece of road.

   434

 * @param end_tile end tile of drag

   435

 * @param p1 start tile of drag

   436

 * @param p2 various bitstuffed elements

   437

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

   438

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

   439

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

   440

 */

   441

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

   442

{

   443

	TileIndex start_tile, tile;

   444

	int32 cost, ret;

   445

   446

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   447

   448

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

   449

   450

	start_tile = p1;

   451

   452

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

   453

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

   454

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

   455

   456

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

   457

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

   458

		TileIndex t = start_tile;

   459

		start_tile = end_tile;

   460

		end_tile = t;

   461

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

   462

	}

   463

   464

	cost = 0;

   465

	tile = start_tile;

   466

	// Start tile is the small number.

   467

	for (;;) {

   468

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

   469

   470

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

   471

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

   472

   473

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

   474

		if (CmdFailed(ret)) {

   475

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   476

		} else {

   477

			cost += ret;

   478

		}

   479

   480

		if (tile == end_tile) break;

   481

   482

		tile += HASBIT(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);

   483

	}

   484

   485

	return (cost == 0) ? CMD_ERROR : cost;

   486

}

   487

   488

/** Remove a long piece of road.

   489

 * @param end_tile end tile of drag