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

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

    51

		owner = GetCrossingRoadOwner(tile);

    52

	} else {

    53

		owner = GetTileOwner(tile);

    54

	}

    55

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

    56

	// by a town

    57

	if (owner != OWNER_TOWN) {

    58

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

    59

	}

    60

    61

	if (_cheats.magic_bulldozer.value) return true;

    62

    63

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

    64

	n = 0;

    65

	present = GetAnyRoadBits(tile);

    66

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

    67

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

    68

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

    69

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

    70

    71

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

    72

	// then allow it

    73

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

    74

		Town *t;

    75

		*edge_road = false;

    76

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

    77

		if (_patches.extra_dynamite) return true;

    78

    79

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    80

    81

		SetDParam(0, t->index);

    82

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    83

		return false;

    84

	}

    85

    86

	return true;

    87

}

    88

    89

    90

/** Delete a piece of road.

    91

 * @param x,y tile coordinates for road construction

    92

 * @param p1 road piece flags

    93

 * @param p2 unused

    94

 */

    95

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

    96

{

    97

	// cost for removing inner/edge -roads

    98

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

    99

   100

	TileIndex tile;

   101

	PlayerID owner;

   102

	Town *t;

   103

	/* true if the roadpiece was always removeable,

   104

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

   105

	bool edge_road;

   106

	RoadBits pieces;

   107

   108

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   109

   110

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

   111

	if (p1 >> 4) return CMD_ERROR;

   112

	pieces = p1;

   113

   114

	tile = TileVirtXY(x, y);

   115

   116

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

   117

   118

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

   119

   120

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

   121

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

   122

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   123

		} else {

   124

			t = GetTownByTile(tile);

   125

		}

   126

	} else {

   127

		t = NULL;

   128

	}

   129

   130

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

   131

   132

	switch (GetTileType(tile)) {

   133

		case MP_TUNNELBRIDGE:

   134

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

   135

   136

			if (!IsBridge(tile) ||

   137

					!IsBridgeMiddle(tile) ||

   138

					!IsTransportUnderBridge(tile) ||

   139

					GetTransportTypeUnderBridge(tile) != TRANSPORT_ROAD ||

   140

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

   141

				return CMD_ERROR;

   142

			}

   143

   144

			if (flags & DC_EXEC) {

   145

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

   146

				SetClearUnderBridge(tile);

   147

				MarkTileDirtyByTile(tile);

   148

			}

   149

			return _price.remove_road * 2;

   150

   151

		case MP_STREET:

   152

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   153

   154

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

   155

			// removal allowance depends on difficulty setting

   156

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

   157

   158

			switch (GetRoadType(tile)) {

   159

				case ROAD_NORMAL: {

   160

					RoadBits present = GetRoadBits(tile);

   161

					RoadBits c = pieces;

   162

   163

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

   164

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

   165

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

   166

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

   167

					}

   168

   169

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

   170

					c &= present;

   171

					if (c == 0) return CMD_ERROR;

   172

   173

					if (flags & DC_EXEC) {

   174

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

   175

   176

						present ^= c;

   177

						if (present == 0) {

   178

							DoClearSquare(tile);

   179

						} else {

   180

							SetRoadBits(tile, present);

   181

							MarkTileDirtyByTile(tile);

   182

						}

   183

					}

   184

					return CountRoadBits(c) * _price.remove_road;

   185

				}

   186

   187

				case ROAD_CROSSING: {

   188

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

   189

						return CMD_ERROR;

   190

					}

   191

   192

					if (flags & DC_EXEC) {

   193

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

   194

   195

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

   196

						MarkTileDirtyByTile(tile);

   197

					}

   198

					return _price.remove_road * 2;

   199

				}

   200

   201

				default:

   202

				case ROAD_DEPOT:

   203

					return CMD_ERROR;

   204

			}

   205

   206

		default: return CMD_ERROR;

   207

	}

   208

}

   209

   210

   211

static const RoadBits _valid_tileh_slopes_road[][15] = {

   212

	// set of normal ones

   213

	{

   214

		ROAD_ALL, 0, 0,

   215

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

   216

		ROAD_Y,   0, 0,

   217

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

   218

		ROAD_X,   0, 0

   219

	},

   220

	// allowed road for an evenly raised platform

   221

	{

   222

		0,

   223

		ROAD_SW | ROAD_NW,

   224

		ROAD_SW | ROAD_SE,

   225

		ROAD_Y  | ROAD_SW,

   226

   227

		ROAD_SE | ROAD_NE, // 4

   228

		ROAD_ALL,

   229

		ROAD_X  | ROAD_SE,

   230

		ROAD_ALL,

   231

   232

		ROAD_NW | ROAD_NE, // 8

   233

		ROAD_X  | ROAD_NW,

   234

		ROAD_ALL,

   235

		ROAD_ALL,

   236

   237

		ROAD_Y  | ROAD_NE, // 12

   238

		ROAD_ALL,

   239

		ROAD_ALL

   240

	},

   241

};

   242

   243

   244

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

   245

{

   246

	RoadBits road_bits;

   247

   248

	if (IsSteepTileh(tileh)) return CMD_ERROR;

   249

	road_bits = *pieces | existing;

   250

   251

	// no special foundation

   252

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

   253

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

   254

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

   255

		return 0; // no extra cost

   256

	}

   257

   258

	// foundation is used. Whole tile is leveled up

   259

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

   260

		return existing ? 0 : _price.terraform;

   261

	}

   262

   263

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

   264

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

   265

		// force full pieces.

   266

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

   267

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

   268

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

   269

	}

   270

	return CMD_ERROR;

   271

}

   272

   273

/** Build a piece of road.

   274

 * @param x,y tile coordinates for road construction

   275

 * @param p1 road piece flags

   276

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

   277

 */

   278

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

   279

{

   280

	TileInfo ti;

   281

	int32 cost = 0;

   282

	int32 ret;

   283

	RoadBits existing = 0;

   284

	RoadBits pieces;

   285

	TileIndex tile;

   286

   287

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   288

   289

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

   290

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

   291

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

   292

	pieces = p1;

   293

   294

	FindLandscapeHeight(&ti, x, y);

   295

	tile = ti.tile;

   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

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   306

					break;

   307

   308

				case ROAD_CROSSING:

   309

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

   310

						return_cmd_error(STR_1007_ALREADY_BUILT);

   311

					}

   312

					goto do_clear;

   313

   314

				default:

   315

				case ROAD_DEPOT:

   316

					goto do_clear;

   317

			}

   318

			break;

   319

   320

		case MP_RAILWAY: {

   321

			Axis roaddir;

   322

   323

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

   324

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   325

			}

   326

   327

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

   328

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

   329

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

   330

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   331

			}

   332

#undef M

   333

   334

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

   335

			switch (GetTrackBits(tile)) {

   336

				case TRACK_BIT_X:

   337

					if (pieces & ROAD_X) goto do_clear;

   338

					roaddir = AXIS_Y;

   339

					break;

   340

   341

				case TRACK_BIT_Y:

   342

					if (pieces & ROAD_Y) goto do_clear;

   343

					roaddir = AXIS_X;

   344

					break;

   345

   346

				default: goto do_clear;

   347

			}

   348

   349

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   350

   351

			if (flags & DC_EXEC) {

   352

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

   353

				MarkTileDirtyByTile(tile);

   354

			}

   355

			return _price.build_road * 2;

   356

		}

   357

   358

		case MP_TUNNELBRIDGE:

   359

			/* check for flat land */

   360

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

   361

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   362

			}

   363

   364

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

   365

   366

			/* only allow roads pertendicular to bridge */

   367

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

   368

				goto do_clear;

   369

			}

   370

   371

			/* check if clear land under bridge */

   372

			if (IsTransportUnderBridge(tile)) {

   373

				switch (GetTransportTypeUnderBridge(tile)) {

   374

					case TRANSPORT_ROAD: return_cmd_error(STR_1007_ALREADY_BUILT);

   375

					default: return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   376

				}

   377

			} else {

   378

				if (IsWaterUnderBridge(tile)) {

   379

					return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   380

				}

   381

			}

   382

   383

			if (flags & DC_EXEC) {

   384

				SetRoadUnderBridge(tile, _current_player);

   385

				MarkTileDirtyByTile(tile);

   386

			}

   387

			return _price.build_road * 2;

   388

   389

		default:

   390

do_clear:;

   391

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

   392

			if (CmdFailed(ret)) return ret;

   393

			cost += ret;

   394

	}

   395

   396

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

   397

	if (CmdFailed(ret)) return_cmd_error(STR_1800_LAND_SLOPED_IN_WRONG_DIRECTION);

   398

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

   399

		return CMD_ERROR;

   400

	}

   401

	cost += ret;

   402

   403

	if (ti.type == MP_STREET) {

   404

		// Don't put the pieces that already exist

   405

		pieces &= ComplementRoadBits(existing);

   406

	}

   407

   408

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

   409

   410

	if (flags & DC_EXEC) {

   411

		if (ti.type == MP_STREET) {

   412

			SetRoadBits(tile, existing | pieces);

   413

		} else {

   414

			MakeRoadNormal(tile, _current_player, pieces, p2);

   415

		}

   416

   417

		MarkTileDirtyByTile(tile);

   418

	}

   419

	return cost;

   420

}

   421

   422

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

   423

{

   424

	// not a railroad crossing?

   425

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   426

   427

	// not owned by me?

   428

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

   429

   430

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

   431

   432

	if (exec) {

   433

		SetRailTypeCrossing(tile, totype);

   434

		MarkTileDirtyByTile(tile);

   435

	}

   436

   437

	return _price.build_rail >> 1;

   438

}

   439

   440

   441

/** Build a long piece of road.

   442

 * @param x,y end tile of drag

   443

 * @param p1 start tile of drag

   444

 * @param p2 various bitstuffed elements

   445

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

   446

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

   447

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

   448

 */

   449

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

   450

{

   451

	TileIndex start_tile, end_tile, tile;

   452

	int32 cost, ret;

   453

   454

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   455

   456

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

   457

   458

	start_tile = p1;

   459

	end_tile = TileVirtXY(x, y);

   460

   461

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

   462

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

   463

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

   464

   465

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

   466

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

   467

		TileIndex t = start_tile;

   468

		start_tile = end_tile;

   469

		end_tile = t;

   470

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

   471

	}

   472

   473

	cost = 0;

   474

	tile = start_tile;

   475

	// Start tile is the small number.

   476

	for (;;) {

   477

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

   478

   479

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

   480

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

   481

   482

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

   483

		if (CmdFailed(ret)) {

   484

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   485

		} else {

   486

			cost += ret;

   487

		}

   488

   489

		if (tile == end_tile) break;

   490

   491

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