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 "yapf/yapf.h"

    22

#include "depot.h"

    23

    24

void RoadVehEnterDepot(Vehicle *v);

    25

    26

    27

static uint CountRoadBits(RoadBits r)

    28

{

    29

	uint count = 0;

    30

    31

	if (r & ROAD_NW) ++count;

    32

	if (r & ROAD_SW) ++count;

    33

	if (r & ROAD_SE) ++count;

    34

	if (r & ROAD_NE) ++count;

    35

	return count;

    36

}

    37

    38

    39

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

    40

{

    41

	RoadBits present;

    42

	RoadBits n;

    43

	byte owner;

    44

	*edge_road = true;

    45

    46

	if (_game_mode == GM_EDITOR) return true;

    47

    48

	// Only do the special processing for actual players.

    49

	if (_current_player >= MAX_PLAYERS) return true;

    50

    51

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

    52

    53

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

    54

	// by a town

    55

	if (owner != OWNER_TOWN) {

    56

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

    57

	}

    58

    59

	if (_cheats.magic_bulldozer.value) return true;

    60

    61

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

    62

	n = 0;

    63

	present = GetAnyRoadBits(tile);

    64

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

    65

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

    66

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

    67

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

    68

    69

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

    70

	// then allow it

    71

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

    72

		Town *t;

    73

		*edge_road = false;

    74

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

    75

		if (_patches.extra_dynamite) return true;

    76

    77

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    78

    79

		SetDParam(0, t->index);

    80

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    81

		return false;

    82

	}

    83

    84

	return true;

    85

}

    86

    87

    88

/** Delete a piece of road.

    89

 * @param tile tile where to remove road from

    90

 * @param p1 road piece flags

    91

 * @param p2 unused

    92

 */

    93

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

    94

{

    95

	// cost for removing inner/edge -roads

    96

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

    97

    98

	PlayerID owner;

    99

	Town *t;

   100

	/* true if the roadpiece was always removeable,

   101

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

   102

	bool edge_road;

   103

	RoadBits pieces;

   104

   105

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   106

   107

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

   108

	if (p1 >> 4) return CMD_ERROR;

   109

	pieces = p1;

   110

   112

   113

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

   114

   115

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

   117

	} else {

   118

		t = NULL;

   119

	}

   120

   121

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

   122

   124

   160

				return CMD_ERROR;

   161

			}

   162

   163

			if (flags & DC_EXEC) {

   164

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

   167

				MarkTileDirtyByTile(tile);

   168

			}

   169

			return _price.remove_road * 2;

   171

   175

	}

   176

}

   177

   178

   179

static const RoadBits _valid_tileh_slopes_road[][15] = {

   180

	// set of normal ones

   181

	{

   182

		ROAD_ALL, 0, 0,

   183

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

   184

		ROAD_Y,   0, 0,

   185

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

   186

		ROAD_X,   0, 0

   187

	},

   188

	// allowed road for an evenly raised platform

   189

	{

   190

		0,

   191

		ROAD_SW | ROAD_NW,

   192

		ROAD_SW | ROAD_SE,

   193

		ROAD_Y  | ROAD_SW,

   194

   195

		ROAD_SE | ROAD_NE, // 4

   196

		ROAD_ALL,

   197

		ROAD_X  | ROAD_SE,

   198

		ROAD_ALL,

   199

   200

		ROAD_NW | ROAD_NE, // 8

   201

		ROAD_X  | ROAD_NW,

   202

		ROAD_ALL,

   203

		ROAD_ALL,

   204

   205

		ROAD_Y  | ROAD_NE, // 12

   206

		ROAD_ALL,

   207

		ROAD_ALL

   208

	},

   209

};

   210

   211

   212

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

   213

{

   214

	RoadBits road_bits;

   215

   216

	if (IsSteepSlope(tileh)) return CMD_ERROR;

   217

	road_bits = *pieces | existing;

   218

   219

	// no special foundation

   220

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

   221

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

   222

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

   223

		return 0; // no extra cost

   224

	}

   225

   226

	// foundation is used. Whole tile is leveled up

   227

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

   228

		return existing ? 0 : _price.terraform;

   229

	}

   230

   231

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

   232

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

   233

		// force full pieces.

   234

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

   235

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

   236

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

   237

	}

   238

	return CMD_ERROR;

   239

}

   240

   241

/** Build a piece of road.

   242

 * @param tile tile where to build road

   243

 * @param p1 road piece flags

   244

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

   245

 */

   246

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

   247

{

   248

	int32 cost = 0;

   249

	int32 ret;

   250

	RoadBits existing = 0;

   251

	RoadBits pieces;

   252

	Slope tileh;

   253

   254

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   255

   256

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

   257

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

   258

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

   259

	pieces = p1;

   260

   261

	tileh = GetTileSlope(tile, NULL);

   262

   263

	switch (GetTileType(tile)) {

   264

		case MP_STREET:

   265

			switch (GetRoadTileType(tile)) {

   266

				case ROAD_TILE_NORMAL:

   267

					existing = GetRoadBits(tile);

   268

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

   269

						return_cmd_error(STR_1007_ALREADY_BUILT);

   270

					}

   271

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   272

					break;

   273

   274

				case ROAD_TILE_CROSSING:

   275

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

   276

						return_cmd_error(STR_1007_ALREADY_BUILT);

   277

					}

   278

					goto do_clear;

   279

   280

				default:

   281

				case ROAD_TILE_DEPOT:

   282

					goto do_clear;

   283

			}

   284

			break;

   285

   286

		case MP_RAILWAY: {

   287

			Axis roaddir;

   288

   289

			if (IsSteepSlope(tileh)) {

   290

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   291

			}

   292

   293

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

   294

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

   295

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

   296

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   297

			}

   298

#undef M

   299

   300

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

   301

			switch (GetTrackBits(tile)) {

   302

				case TRACK_BIT_X:

   303

					if (pieces & ROAD_X) goto do_clear;

   304

					roaddir = AXIS_Y;

   305

					break;

   306

   307

				case TRACK_BIT_Y:

   308

					if (pieces & ROAD_Y) goto do_clear;

   309

					roaddir = AXIS_X;

   310

					break;

   311

   312

				default: goto do_clear;

   313

			}

   314

   315

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   316

   317

			if (flags & DC_EXEC) {

   318

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

   319

				MarkTileDirtyByTile(tile);

   320

			}

   321

			return _price.build_road * 2;

   322

		}

   323

   324

		default:

   325

do_clear:;

   326

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

   327

			if (CmdFailed(ret)) return ret;

   328

			cost += ret;

   329

	}

   330

   331

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

   332

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

   333

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

   334

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

   335

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   336

   337

	cost += ret;

   338

   339

	if (IsTileType(tile, MP_STREET)) {

   340

		// Don't put the pieces that already exist

   341

		pieces &= ComplementRoadBits(existing);

   342

	}

   343

   344

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

   345

   346

	if (flags & DC_EXEC) {

   347

		if (IsTileType(tile, MP_STREET)) {

   348

			SetRoadBits(tile, existing | pieces);

   349

		} else {

   350

			MakeRoadNormal(tile, _current_player, pieces, p2);

   351

		}

   352

   353

		MarkTileDirtyByTile(tile);

   354

	}

   355

	return cost;

   356

}

   357

   358

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

   359

{

   360

	// not a railroad crossing?

   361

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   362

   363

	// not owned by me?

   364

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

   365

   366

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

   367

   368

	if (exec) {

   369

		SetRailTypeCrossing(tile, totype);

   370

		MarkTileDirtyByTile(tile);

   371

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

   372

	}

   373

   374

	return _price.build_rail >> 1;

   375

}

   376

   377

   378

/** Build a long piece of road.

   379

 * @param end_tile end tile of drag

   380

 * @param p1 start tile of drag

   381

 * @param p2 various bitstuffed elements

   382

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

   383

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

   384

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

   385

 */

   386

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

   387

{

   388

	TileIndex start_tile, tile;

   389

	int32 cost, ret;

   390

   391

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   392

   393

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

   394

   395

	start_tile = p1;

   396

   397

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

   398

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

   399

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

   400

   401

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

   402

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

   403

		TileIndex t = start_tile;

   404

		start_tile = end_tile;

   405

		end_tile = t;

   406

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

   407

	}

   408

   409

	cost = 0;

   410

	tile = start_tile;

   411

	// Start tile is the small number.

   412

	for (;;) {

   413

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

   414

   415

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

   416

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

   417

   418

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

   419

		if (CmdFailed(ret)) {

   420

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   421

			_error_message = INVALID_STRING_ID;

   422

		} else {

   423

			cost += ret;

   424

		}

   425

   426

		if (tile == end_tile) break;

   427

   428

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

   429

	}

   430

   431

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

   432

}

   433

   434

/** Remove a long piece of road.

   435

 * @param end_tile end tile of drag

   436

 * @param p1 start tile of drag

   437

 * @param p2 various bitstuffed elements

   438

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

   439

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

   440

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

   441

 */

   442

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

   443

{

   444

	TileIndex start_tile, tile;

   445

	int32 cost, ret;

   446

   447

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   448

   449

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

   450

   451

	start_tile = p1;

   452

   453

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

   454

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

   455

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

   456

   457

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

   458

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

   459

		TileIndex t = start_tile;

   460

		start_tile = end_tile;

   461

		end_tile = t;

   462

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

   463

	}

   464

   465

	cost = 0;

   466

	tile = start_tile;

   467

	// Start tile is the small number.

   468

	for (;;) {

   469

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

   470

   471

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

   472

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

   473

   474

		// try to remove the halves.

   475

		if (bits != 0) {

   476

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

   477

			if (!CmdFailed(ret)) 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

/** Build a road depot.

   489

 * @param tile tile where to build the depot