1

/* $Id$ */

     2

     3

/** @file road_cmd.cpp */

     4

     5

#include "stdafx.h"

     6

#include "openttd.h"

     7

#include "bridge_map.h"

     8

#include "bridge.h"

     9

#include "cmd_helper.h"

    10

#include "rail_map.h"

    11

#include "road_map.h"

    12

#include "sprite.h"

    13

#include "table/sprites.h"

    14

#include "table/strings.h"

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#include "functions.h"

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#include "map.h"

    17

#include "landscape.h"

    18

#include "tile.h"

    19

#include "town_map.h"

    20

#include "vehicle.h"

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#include "viewport.h"

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#include "command.h"

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#include "player.h"

    24

#include "town.h"

    25

#include "gfx.h"

    26

#include "sound.h"

    27

#include "yapf/yapf.h"

    28

#include "depot.h"

    29

#include "newgrf.h"

    30

    31

    32

static uint CountRoadBits(RoadBits r)

    33

{

    34

	uint count = 0;

    35

    36

	if (r & ROAD_NW) ++count;

    37

	if (r & ROAD_SW) ++count;

    38

	if (r & ROAD_SE) ++count;

    39

	if (r & ROAD_NE) ++count;

    40

	return count;

    41

}

    42

    43

    45

{

    46

	RoadBits present;

    47

	RoadBits n;

    48

	*edge_road = true;

    49

    51

    52

	/* Only do the special processing for actual players. */

    53

	if (!IsValidPlayer(_current_player)) return true;

    54

    55

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

    56

	 * by a town */

    57

	if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);

    58

    59

	if (_cheats.magic_bulldozer.value) return true;

    60

    61

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

    62

	n = ROAD_NONE;

    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, (uint)-1);

    78

    79

		SetDParam(0, t->index);

    80

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    81

		return false;

    82

	}

    83

    84

	return true;

    85

}

    86

    88

{

    90

}

    91

    92

/** Delete a piece of road.

    93

 * @param tile tile where to remove road from

    94

 * @param flags operation to perform

    95

 * @param p1 bit 0..3 road pieces to remove (RoadBits)

    97

 * @param p2 unused

    98

 */

    99

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

   100

{

   101

	/* cost for removing inner/edge -roads */

   102

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

   103

   104

	Town *t;

   105

	/* true if the roadpiece was always removeable,

   106

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

   107

	bool edge_road;

   108

   109

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   110

   113

   115

   116

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

   117

		t = GetTownByTile(tile);

   118

	} else {

   119

		t = NULL;

   120

	}

   121

   122

	RoadBits pieces = Extract<RoadBits, 0>(p1);

   126

   128

   129

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   130

   131

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

   132

	 * removal allowance depends on difficulty setting */

   133

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

   134

   135

	switch (GetRoadTileType(tile)) {

   136

		case ROAD_TILE_NORMAL: {

   138

			RoadBits c = pieces;

   139

   140

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

   141

   142

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

   143

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

   144

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

   145

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

   146

			}

   147

   148

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

   149

			c &= present;

   150

			if (c == 0) return CMD_ERROR;

   151

   152

			if (flags & DC_EXEC) {

   153

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

   154

   155

				present ^= c;

   156

				if (present == 0) {

   163

				} else {

   165

					MarkTileDirtyByTile(tile);

   166

				}

   167

			}

   168

			return CountRoadBits(c) * _price.remove_road;

   169

		}

   170

   171

		case ROAD_TILE_CROSSING: {

   172

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

   173

				return CMD_ERROR;

   174

			}

   175

   176

			if (flags & DC_EXEC) {

   180

   187

				MarkTileDirtyByTile(tile);

   188

				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));

   189

			}

   190

			return _price.remove_road * 2;

   191

		}

   192

   193

		default:

   194

		case ROAD_TILE_DEPOT:

   195

			return CMD_ERROR;

   196

	}

   197

}

   198

   199

   200

static const RoadBits _valid_tileh_slopes_road[][15] = {

   201

	/* set of normal ones */

   202

	{

   203

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   204

		ROAD_X,   ROAD_NONE, ROAD_NONE,  // 3, 4, 5

   205

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   206

		ROAD_Y,   ROAD_NONE, ROAD_NONE,  // 9, 10, 11

   207

		ROAD_X,   ROAD_NONE, ROAD_NONE

   208

	},

   209

	/* allowed road for an evenly raised platform */

   210

	{

   211

		ROAD_NONE,

   212

		ROAD_SW | ROAD_NW,

   213

		ROAD_SW | ROAD_SE,

   214

		ROAD_Y  | ROAD_SW,

   215

   216

		ROAD_SE | ROAD_NE, // 4

   217

		ROAD_ALL,

   218

		ROAD_X  | ROAD_SE,

   219

		ROAD_ALL,

   220

   221

		ROAD_NW | ROAD_NE, // 8

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		ROAD_X  | ROAD_NW,

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		ROAD_ALL,

   224

		ROAD_ALL,

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   226

		ROAD_Y  | ROAD_NE, // 12

   227

		ROAD_ALL,

   228

		ROAD_ALL

   229

	},

   230

};

   231

   232

   233

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

   234

{

   235

	RoadBits road_bits;

   236

   237

	if (IsSteepSlope(tileh)) {

   238

		if (existing == 0) {

   239

			/* force full pieces. */

   240

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

   241

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

   242

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

   243

		}

   244

		return CMD_ERROR;

   245

	}

   246

	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 != SLOPE_FLAT) *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 ? 0 : _price.terraform;

   258

	}

   259

   260

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

   261

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

   262

		/* force full pieces. */

   263

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

   264

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

   265

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

   266

	}

   267

	return CMD_ERROR;

   268

}

   269

   270

/** Build a piece of road.

   271

 * @param tile tile where to build road

   272

 * @param flags operation to perform

   273

 * @param p1 bit 0..3 road pieces to build (RoadBits)

   275

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

   276

 */

   277

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

   278

{

   279

	int32 cost = 0;

   280

	int32 ret;

   281

	RoadBits existing = ROAD_NONE;

   282

	Slope tileh;

   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 ((IsValidPlayer(_current_player) && p2 != 0) || (_current_player == OWNER_TOWN && !IsValidTownID(p2))) return CMD_ERROR;

   289

   290

	RoadBits pieces = Extract<RoadBits, 0>(p1);

   291

   295

	tileh = GetTileSlope(tile, NULL);

   296

   297

	switch (GetTileType(tile)) {

   298

		case MP_STREET:

   299

			switch (GetRoadTileType(tile)) {

   300

				case ROAD_TILE_NORMAL:

   301

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

   302

   304

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

   305

						return_cmd_error(STR_1007_ALREADY_BUILT);

   306

					}

   307

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   308

					break;

   309

   310

				case ROAD_TILE_CROSSING:

   314

   315

				default:

   316

				case ROAD_TILE_DEPOT:

   317

					goto do_clear;

   318

			}

   319

			break;

   320

   321

		case MP_RAILWAY: {

   322

			Axis roaddir;

   323

   324

			if (IsSteepSlope(tileh)) {

   325

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   326

			}

   327

   328

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

   329

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

   330

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

   331

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   332

			}

   333

#undef M

   334

   335

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

   336

			switch (GetTrackBits(tile)) {

   337

				case TRACK_BIT_X:

   338

					if (pieces & ROAD_X) goto do_clear;

   339

					roaddir = AXIS_Y;

   340

					break;

   341

   342

				case TRACK_BIT_Y:

   343

					if (pieces & ROAD_Y) goto do_clear;

   344

					roaddir = AXIS_X;

   345

					break;

   346

   347

				default: goto do_clear;

   348

			}

   349

   350

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   351

   352

			if (flags & DC_EXEC) {

   353

				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));

   355

				MarkTileDirtyByTile(tile);

   356

			}

   357

			return _price.build_road * 2;

   358

		}

   359

   360

		default:

   361

do_clear:;

   362

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

   363

			if (CmdFailed(ret)) return ret;

   364

			cost += ret;

   365

	}

   366

   367

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

   368

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

   369

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

   370

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

   371

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   372

   373

	cost += ret;

   374

   375

	if (IsTileType(tile, MP_STREET)) {

   376

		/* Don't put the pieces that already exist */

   377

		pieces &= ComplementRoadBits(existing);

   378

	}

   379

   380

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

   381

   382

	if (flags & DC_EXEC) {

   383

		if (IsTileType(tile, MP_STREET)) {

   389

		} else {

   391

		}

   392

   393

		MarkTileDirtyByTile(tile);

   394

	}

   395

	return cost;

   396

}

   397

   398

/**

   399

 * Switches the rail type on a level crossing.

   400

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

   401

 * @param totype      The railtype we want to convert to

   402

 * @param exec        Switches between test and execute mode

   403

 * @return            The cost and state of the operation

   404

 * @retval CMD_ERROR  An error occured during the operation.

   405

 */

   406

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

   407

{

   408

	/* not a railroad crossing? */

   409

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   410

   411

	/* not owned by me? */

   412

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

   413

   414

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

   415

   416

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

   417

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

   418

   419

	if (exec) {

   420

		SetRailType(tile, totype);

   421

		MarkTileDirtyByTile(tile);

   422

		YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetCrossingRailBits(tile)));

   423

	}

   424

   425

	return _price.build_rail / 2;

   426

}

   427

   428

   429

/** Build a long piece of road.

   430

 * @param end_tile end tile of drag

   431

 * @param flags operation to perform

   432

 * @param p1 start tile of drag

   433

 * @param p2 various bitstuffed elements

   434

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

   435

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

   436

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

   438

 */

   439

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

   440

{

   441

	TileIndex start_tile, tile;

   442

	int32 cost, ret;

   443

   444

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   445

   446

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

   447

   448

	start_tile = p1;

   450

   451

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

   452

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

   453

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

   454

   455

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

   456

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

   457

		TileIndex t = start_tile;

   458

		start_tile = end_tile;

   459

		end_tile = t;

   460

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

   461

	}

   462

   463

	cost = 0;

   464

	tile = start_tile;

   465

	/* Start tile is the small number. */

   466

	for (;;) {

   467

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

   468

   469

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

   470

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

   471

   473

		if (CmdFailed(ret)) {

   474

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   475

			_error_message = INVALID_STRING_ID;

   476

		} else {

   477

			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;