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 "vehicle.h"

    14

#include "viewport.h"

    15

#include "command.h"

    16

#include "player.h"

    17

#include "town.h"

    18

#include "gfx.h"

    19

#include "sound.h"

    20

#include "depot.h"

    21

    22

void RoadVehEnterDepot(Vehicle *v);

    23

    24

    25

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

    26

{

    27

	RoadBits present;

    28

	RoadBits n;

    29

	byte owner;

    30

	*edge_road = true;

    31

    32

	if (_game_mode == GM_EDITOR) return true;

    33

    34

	// Only do the special processing for actual players.

    35

	if (_current_player >= MAX_PLAYERS) return true;

    36

    37

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

    38

		owner = GetCrossingRoadOwner(tile);

    39

	} else {

    40

		owner = GetTileOwner(tile);

    41

	}

    42

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

    43

	// by a town

    44

	if (owner != OWNER_TOWN) {

    45

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

    46

	}

    47

    48

	if (_cheats.magic_bulldozer.value) return true;

    49

    50

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

    51

	n = 0;

    52

	present = GetAnyRoadBits(tile);

    53

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

    54

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

    55

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

    56

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

    57

    58

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

    59

	// then allow it

    60

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

    61

		Town *t;

    62

		*edge_road = false;

    63

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

    64

		if (_patches.extra_dynamite) return true;

    65

    66

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    67

    68

		SetDParam(0, t->index);

    69

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    70

		return false;

    71

	}

    72

    73

	return true;

    74

}

    75

    76

    77

/** Delete a piece of road.

    78

 * @param x,y tile coordinates for road construction

    79

 * @param p1 road piece flags

    80

 * @param p2 unused

    81

 */

    82

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

    83

{

    84

	// cost for removing inner/edge -roads

    85

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

    86

    87

	int32 cost;

    88

	TileIndex tile;

    89

	PlayerID owner;

    90

	Town *t;

    91

	/* true if the roadpiece was always removeable,

    92

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

    93

	bool edge_road;

    94

	RoadBits pieces;

    95

    96

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

    97

    98

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

    99

	if (p1 >> 4) return CMD_ERROR;

   100

	pieces = p1;

   101

   102

	tile = TileVirtXY(x, y);

   103

   104

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

   105

   106

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

   107

   108

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

   109

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

   110

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   111

		} else {

   112

			t = GetTown(_m[tile].m2);

   113

		}

   114

	} else {

   115

		t = NULL;

   116

	}

   117

   118

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

   119

   120

	switch (GetTileType(tile)) {

   121

		case MP_TUNNELBRIDGE:

   122

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

   123

   124

			if (!IsBridge(tile) ||

   125

					!IsBridgeMiddle(tile) ||

   126

					!IsTransportUnderBridge(tile) ||

   127

					GetTransportTypeUnderBridge(tile) != TRANSPORT_ROAD ||

   128

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

   129

				return CMD_ERROR;

   130

			}

   131

   132

			cost = _price.remove_road * 2;

   133

   134

			if (flags & DC_EXEC) {

   135

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

   136

				SetClearUnderBridge(tile);

   137

				MarkTileDirtyByTile(tile);

   138

			}

   139

			return cost;

   140

   141

		case MP_STREET:

   142

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   143

   144

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

   145

			// removal allowance depends on difficulty setting

   146

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

   147

   148

			switch (GetRoadType(tile)) {

   149

				case ROAD_NORMAL: {

   150

					RoadBits present = GetRoadBits(tile);

   151

					RoadBits c = pieces;

   152

   153

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

   154

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

   155

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

   156

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

   157

					}

   158

   159

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

   160

					c &= present;

   161

					if (c == 0) return CMD_ERROR;

   162

   163

					// calculate the cost

   164

					cost = 0;

   165

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

   166

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

   167

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

   168

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

   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 cost;

   182

				}

   183

   184

				case ROAD_CROSSING: {

   185

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

   186

						return CMD_ERROR;

   187

					}

   188

   189

					cost = _price.remove_road * 2;

   190

					if (flags & DC_EXEC) {

   191

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

   192

   193

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

   194

						MarkTileDirtyByTile(tile);

   195

					}

   196

					return cost;

   197

				}

   198

   199

				default:

   200

				case ROAD_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(int tileh, RoadBits* pieces, RoadBits existing)

   243

{

   244

	if (!IsSteepTileh(tileh)) {

   245

		RoadBits road_bits = *pieces | existing;

   246

   247

		// no special foundation

   248

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

   249

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

   250

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

   251

			return 0; // no extra cost

   252

		}

   253

   254

		// foundation is used. Whole tile is leveled up

   255

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

   256

			return existing ? 0 : _price.terraform;

   257

		}

   258

   259

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

   260

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

   261

			// force full pieces.

   262

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

   263

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

   264

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

   265

		}

   266

	}

   267

	return CMD_ERROR;

   268

}

   269

   270

/** Build a piece of road.

   271

 * @param x,y tile coordinates for road construction

   272

 * @param p1 road piece flags

   273

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

   274

 */

   275

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

   276

{

   277

	TileInfo ti;

   278

	int32 cost;

   279

	RoadBits existing = 0;

   280

	RoadBits pieces;

   281

	TileIndex tile;

   282

   283

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   284

   285

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

   286

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

   287

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

   288

	pieces = p1;

   289

   290

	FindLandscapeHeight(&ti, x, y);

   291

	tile = ti.tile;

   292

   293

	// allow building road under bridge

   294

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

   295

   296

	switch (ti.type) {

   297

		case MP_STREET:

   298

			switch (GetRoadType(tile)) {

   299

				case ROAD_NORMAL:

   300

					existing = GetRoadBits(tile);

   301

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

   302

						return_cmd_error(STR_1007_ALREADY_BUILT);

   303

					}

   304

					break;

   305

   306

				case ROAD_CROSSING:

   307

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

   308

						return_cmd_error(STR_1007_ALREADY_BUILT);

   309

					}

   310

					goto do_clear;

   311

   312

				default:

   313

				case ROAD_DEPOT:

   314

					goto do_clear;

   315

			}

   316

			break;

   317

   318

		case MP_RAILWAY: {

   319

			Axis roaddir;

   320

   321

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

   322

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   323

			}

   324

   325

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

   326

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

   327

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

   328

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   329

			}

   330

#undef M

   331

   332

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

   333

			switch (GetTrackBits(tile)) {

   334

				case TRACK_BIT_X:

   335

					if (pieces & ROAD_X) goto do_clear;

   336

					roaddir = AXIS_Y;

   337

					break;

   338

   339

				case TRACK_BIT_Y:

   340

					if (pieces & ROAD_Y) goto do_clear;

   341

					roaddir = AXIS_X;

   342

					break;

   343

   344

				default: goto do_clear;

   345

			}

   346

   347

			if (flags & DC_EXEC) {

   348

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

   349

				MarkTileDirtyByTile(tile);

   350

			}

   351

			return _price.build_road * 2;

   352

		}

   353

   354

		case MP_TUNNELBRIDGE:

   355

			/* check for flat land */

   356

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

   357

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   358

			}

   359

   360

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

   361

   362

			/* only allow roads pertendicular to bridge */

   363

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

   364

				goto do_clear;

   365

			}

   366

   367

			/* check if clear land under bridge */

   368

			if (IsTransportUnderBridge(tile)) {

   369

				switch (GetTransportTypeUnderBridge(tile)) {

   370

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   371

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   372

				}

   373

			} else {

   374

				if (IsWaterUnderBridge(tile)) {

   375

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   376

				}

   377

			}

   378

   379

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

   380

			cost = _price.build_road * 2;

   381

			if (flags & DC_EXEC) {

   382

				SetRoadUnderBridge(tile, _current_player);

   383

				MarkTileDirtyByTile(tile);

   384

			}

   385

			return cost;

   386

   387

		default:

   388

do_clear:;

   389

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

   390

				return CMD_ERROR;

   391

	}

   392

   393

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

   394

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

   395

   396

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

   397

		return CMD_ERROR;

   398

   399

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

   400

		// Don't put the pieces that already exist

   401

		pieces &= ComplementRoadBits(existing);

   402

	} else {

   403

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

   404

	}

   405

   406

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

   407

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

   408

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

   409

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

   410

   411

	if (flags & DC_EXEC) {

   412

		if (ti.type == MP_STREET) {

   413

			SetRoadBits(tile, existing | pieces);

   414

		} else {

   415

			MakeRoadNormal(tile, _current_player, pieces, p2);

   416

		}

   417

   418

		MarkTileDirtyByTile(tile);

   419

	}

   420

	return cost;

   421

}

   422

   423

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

   424

{

   425

	// not a railroad crossing?

   426

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   427

   428

	// not owned by me?

   429

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

   430

   431

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

   432

   433

	if (exec) {

   434

		SetRailTypeCrossing(tile, totype);

   435

		MarkTileDirtyByTile(tile);

   436

	}

   437

   438

	return _price.build_rail >> 1;

   439

}

   440

   441

   442

/** Build a long piece of road.

   443

 * @param x,y 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(int x, int y, uint32 flags, uint32 p1, uint32 p2)

   451

{

   452

	TileIndex start_tile, end_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

	end_tile = TileVirtXY(x, y);

   461

   462

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

   463

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

   464

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

   465

   466

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

   467

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

   468

		TileIndex t = start_tile;

   469

		start_tile = end_tile;

   470

		end_tile = t;

   471

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

   472

	}

   473

   474

	cost = 0;

   475

	tile = start_tile;

   476

	// Start tile is the small number.

   477

	for (;;) {

   478

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

   479

   480

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

   481

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

   482

   483

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

   484

		if (CmdFailed(ret)) {

   485

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   486

		} else {

   487

			cost += ret;

   488

		}

   489

   490

		if (tile == end_tile) break;

   491

   492

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