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

    27

{

    28

	RoadBits present;

    29

	RoadBits n;

    30

	byte owner;

    31

	*edge_road = true;

    32

    33

	if (_game_mode == GM_EDITOR) return true;

    34

    35

	// Only do the special processing for actual players.

    36

	if (_current_player >= MAX_PLAYERS) return true;

    37

    38

	if (IsTileType(tile, MP_STREET) && IsLevelCrossing(tile)) {

    39

		owner = GetCrossingRoadOwner(tile);

    40

	} else {

    41

		owner = GetTileOwner(tile);

    42

	}

    43

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

    44

	// by a town

    45

	if (owner != OWNER_TOWN) {

    46

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

    47

	}

    48

    49

	if (_cheats.magic_bulldozer.value) return true;

    50

    51

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

    52

	n = 0;

    53

	present = GetAnyRoadBits(tile);

    54

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

    55

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

    56

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

    57

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

    58

    59

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

    60

	// then allow it

    61

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

    62

		Town *t;

    63

		*edge_road = false;

    64

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

    65

		if (_patches.extra_dynamite) return true;

    66

    67

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    68

    69

		SetDParam(0, t->index);

    70

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    71

		return false;

    72

	}

    73

    74

	return true;

    75

}

    76

    77

    78

/** Delete a piece of road.

    79

 * @param x,y tile coordinates for road construction

    80

 * @param p1 road piece flags

    81

 * @param p2 unused

    82

 */

    83

int32 CmdRemoveRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)

    84

{

    85

	// cost for removing inner/edge -roads

    86

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

    87

    88

	int32 cost;

    89

	TileIndex tile;

    90

	PlayerID owner;

    91

	Town *t;

    92

	/* true if the roadpiece was always removeable,

    93

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

    94

	bool edge_road;

    95

	RoadBits pieces;

    96

    97

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

    98

    99

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

   100

	if (p1 >> 4) return CMD_ERROR;

   101

	pieces = p1;

   102

   103

	tile = TileVirtXY(x, y);

   104

   105

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

   106

   107

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

   108

   109

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

   110

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

   111

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   112

		} else {

   113

			t = GetTownByTile(tile);

   114

		}

   115

	} else {

   116

		t = NULL;

   117

	}

   118

   119

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

   120

   121

	switch (GetTileType(tile)) {

   122

		case MP_TUNNELBRIDGE:

   123

			if (!EnsureNoVehicleZ(tile, TilePixelHeight(tile))) return CMD_ERROR;

   124

   125

			if (!IsBridge(tile) ||

   126

					!IsBridgeMiddle(tile) ||

   127

					!IsTransportUnderBridge(tile) ||

   128

					GetTransportTypeUnderBridge(tile) != TRANSPORT_ROAD ||

   129

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

   130

				return CMD_ERROR;

   131

			}

   132

   133

			cost = _price.remove_road * 2;

   134

   135

			if (flags & DC_EXEC) {

   136

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

   137

				SetClearUnderBridge(tile);

   138

				MarkTileDirtyByTile(tile);

   139

			}

   140

			return cost;

   141

   142

		case MP_STREET:

   143

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   144

   145

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

   146

			// removal allowance depends on difficulty setting

   147

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

   148

   149

			switch (GetRoadType(tile)) {

   150

				case ROAD_NORMAL: {

   151

					RoadBits present = GetRoadBits(tile);

   152

					RoadBits c = pieces;

   153

   154

					if (GetTileSlope(tile, NULL) != 0  &&

   155

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

   156

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

   157

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

   158

					}

   159

   160

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

   161

					c &= present;

   162

					if (c == 0) return CMD_ERROR;

   163

   164

					// calculate the cost

   165

					cost = 0;

   166

					if (c & ROAD_NW) cost += _price.remove_road;

   167

					if (c & ROAD_SW) cost += _price.remove_road;

   168

					if (c & ROAD_SE) cost += _price.remove_road;

   169

					if (c & ROAD_NE) cost += _price.remove_road;

   170

   171

					if (flags & DC_EXEC) {

   172

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

   173

   174

						present ^= c;

   175

						if (present == 0) {

   176

							DoClearSquare(tile);

   177

						} else {

   178

							SetRoadBits(tile, present);

   179

							MarkTileDirtyByTile(tile);

   180

						}

   181

					}

   182

					return cost;

   183

				}

   184

   185

				case ROAD_CROSSING: {

   186

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

   187

						return CMD_ERROR;

   188

					}

   189

   190

					cost = _price.remove_road * 2;

   191

					if (flags & DC_EXEC) {

   192

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

   193

   194

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

   195

						MarkTileDirtyByTile(tile);

   196

					}

   197

					return cost;

   198

				}

   199

   200

				default:

   201

				case ROAD_DEPOT:

   202

					return CMD_ERROR;

   203

			}

   204

   205

		default: return CMD_ERROR;

   206

	}

   207

}

   208

   209

   210

static const RoadBits _valid_tileh_slopes_road[][15] = {

   211

	// set of normal ones

   212

	{

   213

		ROAD_ALL, 0, 0,

   214

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

   215

		ROAD_Y,   0, 0,

   216

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

   217

		ROAD_X,   0, 0

   218

	},

   219

	// allowed road for an evenly raised platform

   220

	{

   221

		0,

   222

		ROAD_SW | ROAD_NW,

   223

		ROAD_SW | ROAD_SE,

   224

		ROAD_Y  | ROAD_SW,

   225

   226

		ROAD_SE | ROAD_NE, // 4

   227

		ROAD_ALL,

   228

		ROAD_X  | ROAD_SE,

   229

		ROAD_ALL,

   230

   231

		ROAD_NW | ROAD_NE, // 8

   232

		ROAD_X  | ROAD_NW,

   233

		ROAD_ALL,

   234

		ROAD_ALL,

   235

   236

		ROAD_Y  | ROAD_NE, // 12

   237

		ROAD_ALL,

   238

		ROAD_ALL

   239

	},

   240

};

   241

   242

   243

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

   244

{

   245

	if (!IsSteepTileh(tileh)) {

   246

		RoadBits road_bits = *pieces | existing;

   247

   248

		// no special foundation

   249

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

   250

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

   251

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

   252

			return 0; // no extra cost

   253

		}

   254

   255

		// foundation is used. Whole tile is leveled up

   256

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

   257

			return existing ? 0 : _price.terraform;

   258

		}

   259

   260

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

   261

		if (existing == 0 && (tileh == 1 || tileh == 2 || tileh == 4 || tileh == 8)) {

   262

			// force full pieces.

   263

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

   264

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

   265

			return (*pieces == ROAD_X || *pieces == ROAD_Y) ? _price.terraform : CMD_ERROR;

   266

		}

   267

	}

   268

	return CMD_ERROR;

   269

}

   270

   271

/** Build a piece of road.

   272

 * @param x,y tile coordinates for road construction

   273

 * @param p1 road piece flags

   274

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

   275

 */

   276

int32 CmdBuildRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)

   277

{

   278

	TileInfo ti;

   279

	int32 cost;

   280

	RoadBits existing = 0;

   281

	RoadBits pieces;

   282

	TileIndex tile;

   283

   284

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   285

   286

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

   287

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

   288

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

   289

	pieces = p1;

   290

   291

	FindLandscapeHeight(&ti, x, y);

   292

	tile = ti.tile;

   293

   294

	// allow building road under bridge

   295

	if (ti.type != MP_TUNNELBRIDGE && !EnsureNoVehicle(tile)) return CMD_ERROR;

   296

   297

	switch (ti.type) {

   298

		case MP_STREET:

   299

			switch (GetRoadType(tile)) {

   300

				case ROAD_NORMAL:

   301

					existing = GetRoadBits(tile);

   302

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

   303

						return_cmd_error(STR_1007_ALREADY_BUILT);

   304

					}

   305

					break;

   306

   307

				case ROAD_CROSSING:

   308

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

   309

						return_cmd_error(STR_1007_ALREADY_BUILT);

   310

					}

   311

					goto do_clear;

   312

   313

				default:

   314

				case ROAD_DEPOT:

   315

					goto do_clear;

   316

			}

   317

			break;

   318

   319

		case MP_RAILWAY: {

   320

			Axis roaddir;

   321

   322

			if (IsSteepTileh(ti.tileh)) { // very steep tile

   323

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   324

			}

   325

   326

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

   327

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

   328

			if (!HASBIT(M(14) | M(13) | M(11) | M(10) | M(7) | M(5) | M(0), ti.tileh)) {

   329

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   330

			}

   331

#undef M

   332

   333

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

   334

			switch (GetTrackBits(tile)) {

   335

				case TRACK_BIT_X:

   336

					if (pieces & ROAD_X) goto do_clear;

   337

					roaddir = AXIS_Y;

   338

					break;

   339

   340

				case TRACK_BIT_Y:

   341

					if (pieces & ROAD_Y) goto do_clear;

   342

					roaddir = AXIS_X;

   343

					break;

   344

   345

				default: goto do_clear;

   346

			}

   347

   348

			if (flags & DC_EXEC) {

   349

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

   350

				MarkTileDirtyByTile(tile);

   351

			}

   352

			return _price.build_road * 2;

   353

		}

   354

   355

		case MP_TUNNELBRIDGE:

   356

			/* check for flat land */

   357

			if (IsSteepTileh(ti.tileh)) { // very steep tile

   358

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   359

			}

   360

   361

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

   362

   363

			/* only allow roads pertendicular to bridge */

   364

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

   365

				goto do_clear;

   366

			}

   367

   368

			/* check if clear land under bridge */

   369

			if (IsTransportUnderBridge(tile)) {

   370

				switch (GetTransportTypeUnderBridge(tile)) {

   371

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   372

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   373

				}

   374

			} else {

   375

				if (IsWaterUnderBridge(tile)) {

   376

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   377

				}

   378

			}

   379

   380

			/* all checked, can build road now! */

   381

			cost = _price.build_road * 2;

   382

			if (flags & DC_EXEC) {

   383

				SetRoadUnderBridge(tile, _current_player);

   384

				MarkTileDirtyByTile(tile);

   385

			}

   386

			return cost;

   387

   388

		default:

   389

do_clear:;

   390

			if (CmdFailed(DoCommandByTile(tile, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR)))

   391

				return CMD_ERROR;

   392

	}

   393

   394

	cost = CheckRoadSlope(ti.tileh, &pieces, existing);

   395

	if (CmdFailed(cost)) return_cmd_error(STR_1800_LAND_SLOPED_IN_WRONG_DIRECTION);

   396

   397

	if (cost && (!_patches.build_on_slopes || _is_old_ai_player))

   398

		return CMD_ERROR;

   399

   400

	if (ti.type == MP_STREET && GetRoadType(tile) == ROAD_NORMAL) {

   401

		// Don't put the pieces that already exist

   402

		pieces &= ComplementRoadBits(existing);

   403

	} else {

   404

		cost += DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   405

	}

   406

   407

	if (pieces & ROAD_NW) cost += _price.build_road;

   408

	if (pieces & ROAD_SW) cost += _price.build_road;

   409

	if (pieces & ROAD_SE) cost += _price.build_road;

   410

	if (pieces & ROAD_NE) cost += _price.build_road;

   411

   412

	if (flags & DC_EXEC) {

   413

		if (ti.type == MP_STREET) {

   414

			SetRoadBits(tile, existing | pieces);

   415

		} else {

   416

			MakeRoadNormal(tile, _current_player, pieces, p2);

   417

		}

   418

   419

		MarkTileDirtyByTile(tile);

   420

	}

   421

	return cost;

   422

}

   423

   424

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

   425

{

   426

	// not a railroad crossing?

   427

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   428

   429

	// not owned by me?

   430

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

   431

   432

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

   433

   434

	if (exec) {

   435

		SetRailTypeCrossing(tile, totype);

   436

		MarkTileDirtyByTile(tile);

   437

	}

   438

   439

	return _price.build_rail >> 1;

   440

}

   441

   442

   443

/** Build a long piece of road.

   444

 * @param x,y end tile of drag

   445

 * @param p1 start tile of drag

   446

 * @param p2 various bitstuffed elements

   447

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

   448

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

   449

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

   450

 */

   451

int32 CmdBuildLongRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)

   452

{

   453

	TileIndex start_tile, end_tile, tile;

   454

	int32 cost, ret;

   455

   456

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   457

   458

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

   459

   460

	start_tile = p1;

   461

	end_tile = TileVirtXY(x, y);

   462

   463

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

   464

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

   465

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

   466

   467

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

   468

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

   469

		TileIndex t = start_tile;

   470

		start_tile = end_tile;

   471

		end_tile = t;

   472

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

   473

	}

   474

   475

	cost = 0;

   476

	tile = start_tile;

   477

	// Start tile is the small number.

   478

	for (;;) {

   479

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

   480

   481

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

   482

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

   483

   484

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

   485

		if (CmdFailed(ret)) {

   486

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   487

		} else {

   488

			cost += ret;

   489

		}

   490

   491

		if (tile == end_tile) break;

   492