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, (uint)-1);

    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

						YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(GetTrackBits(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)) {

   247

		if (existing == 0) {

   248

			// force full pieces.

   249

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

   250

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

   251

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

   252

		}

   253

		return CMD_ERROR;

   254

	}

   255

	road_bits = *pieces | existing;

   256

   257

	// no special foundation

   258

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

   259

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

   260

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

   261

		return 0; // no extra cost

   262

	}

   263

   264

	// foundation is used. Whole tile is leveled up

   265

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

   266

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

   267

	}

   268

   269

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

   270

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

   271

		// force full pieces.

   272

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

   273

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

   274

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

   275

	}

   276

	return CMD_ERROR;

   277

}

   278

   279

/** Build a piece of road.

   280

 * @param tile tile where to build road

   281

 * @param p1 road piece flags

   282

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

   283

 */

   284

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

   285

{

   286

	int32 cost = 0;

   287

	int32 ret;

   288

	RoadBits existing = 0;

   289

	RoadBits pieces;

   290

	Slope tileh;

   291

   292

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   293

   294

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

   295

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

   296

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

   297

	pieces = p1;

   298

   299

	tileh = GetTileSlope(tile, NULL);

   300

   301

	switch (GetTileType(tile)) {

   302

		case MP_STREET:

   303

			switch (GetRoadTileType(tile)) {

   304

				case ROAD_TILE_NORMAL:

   305

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

   306

   307

					existing = GetRoadBits(tile);

   308

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

   309

						return_cmd_error(STR_1007_ALREADY_BUILT);

   310

					}

   311

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   312

					break;

   313

   314

				case ROAD_TILE_CROSSING:

   315

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

   316

						return_cmd_error(STR_1007_ALREADY_BUILT);

   317

					}

   318

					goto do_clear;

   319

   320

				default:

   321

				case ROAD_TILE_DEPOT:

   322

					goto do_clear;

   323

			}

   324

			break;

   325

   326

		case MP_RAILWAY: {

   327

			Axis roaddir;

   328

   329

			if (IsSteepSlope(tileh)) {

   330

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   331

			}

   332

   333

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

   334

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

   335

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

   336

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   337

			}

   338

#undef M

   339

   340

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

   341

			switch (GetTrackBits(tile)) {

   342

				case TRACK_BIT_X:

   343

					if (pieces & ROAD_X) goto do_clear;

   344

					roaddir = AXIS_Y;

   345

					break;

   346

   347

				case TRACK_BIT_Y:

   348

					if (pieces & ROAD_Y) goto do_clear;

   349

					roaddir = AXIS_X;

   350

					break;

   351

   352

				default: goto do_clear;

   353

			}

   354

   355

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   356

   357

			if (flags & DC_EXEC) {

   358

				YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(GetTrackBits(tile)));

   359

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

   360

				MarkTileDirtyByTile(tile);

   361

			}

   362

			return _price.build_road * 2;

   363

		}

   364

   365

		case MP_TUNNELBRIDGE:

   366

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

   367

   368

			/* only allow roads pertendicular to bridge */

   369

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

   370

				goto do_clear;

   371

			}

   372

   373

			/* check if clear land under bridge */

   374

			if (IsTransportUnderBridge(tile)) {

   375

				switch (GetTransportTypeUnderBridge(tile)) {

   376

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   377

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   378

				}

   379

			} else {

   380

				if (IsWaterUnderBridge(tile)) {

   381

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   382

				}

   383

			}

   384

   385

			if (flags & DC_EXEC) {

   386

				SetRoadUnderBridge(tile, _current_player);

   387

				MarkTileDirtyByTile(tile);

   388

			}

   389

			return _price.build_road * 2;

   390

   391

		default:

   392

do_clear:;

   393

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

   394

			if (CmdFailed(ret)) return ret;

   395

			cost += ret;

   396

	}

   397

   398

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

   399

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

   400

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

   401

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

   402

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   403

   404

	cost += ret;

   405

   406

	if (IsTileType(tile, MP_STREET)) {

   407

		// Don't put the pieces that already exist

   408

		pieces &= ComplementRoadBits(existing);

   409

	}

   410

   411

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

   412

   413

	if (flags & DC_EXEC) {

   414

		if (IsTileType(tile, MP_STREET)) {

   415

			SetRoadBits(tile, existing | pieces);

   416

		} else {

   417

			MakeRoadNormal(tile, _current_player, pieces, p2);

   418

		}

   419

   420

		MarkTileDirtyByTile(tile);

   421

	}

   422

	return cost;

   423

}

   424

   425

/**

   426

 * Switches the rail type on a level crossing.

   427

 * @param tile        The tile on which the railtype is to be convert.

   428

 * @param totype      The railtype we want to convert to

   429

 * @param exec        Switches between test and execute mode

   430

 * @return            The cost and state of the operation

   431

 * @retval CMD_ERROR  An error occured during the operation.

   432

 */

   433

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

   434

{

   435

	// not a railroad crossing?

   436

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   437

   438

	// not owned by me?

   439

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

   440

   441

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

   442

   443

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

   444

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

   445

   446

	if (exec) {

   447

		SetRailTypeCrossing(tile, totype);

   448

		MarkTileDirtyByTile(tile);

   449

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

   450

	}

   451

   452

	return _price.build_rail / 2;

   453

}

   454

   455

   456

/** Build a long piece of road.

   457

 * @param end_tile end tile of drag

   458

 * @param p1 start tile of drag

   459

 * @param p2 various bitstuffed elements

   460

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

   461

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

   462

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

   463

 */

   464

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

   465

{

   466

	TileIndex start_tile, tile;

   467

	int32 cost, ret;

   468

   469

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   470

   471

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

   472

   473

	start_tile = p1;

   474

   475

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

   476

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

   477

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

   478

   479

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

   480

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

   481

		TileIndex t = start_tile;

   482

		start_tile = end_tile;

   483

		end_tile = t;

   484

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

   485

	}

   486

   487

	cost = 0;

   488

	tile = start_tile;

   489

	// Start tile is the small number.

   490

	for (;;) {