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"

    15

#include "functions.h"

    16

#include "map.h"

    17

#include "landscape.h"

    18

#include "tile.h"

    19

#include "town_map.h"

    20

#include "vehicle.h"

    21

#include "viewport.h"

    22

#include "command.h"

    23

#include "player.h"

    24

#include "town.h"

    25

#include "gfx.h"

    26

#include "sound.h"

    27

#include "yapf/yapf.h"

    28

#include "depot.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;

   151

   152

			present ^= c;

   153

			if (flags & DC_EXEC) {

   154

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

   155

   164

				} else {

   166

					MarkTileDirtyByTile(tile);

   167

				}

   168

			}

   169

			return CountRoadBits(c) * _eco->GetPrice(CEconomy::REMOVE_ROAD, tile, (present == 0));

   170

		}

   171

   172

		case ROAD_TILE_CROSSING: {

   173

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

   174

				return CMD_ERROR;

   175

			}

   176

   177

			if (flags & DC_EXEC) {

   181

   188

				MarkTileDirtyByTile(tile);

   189

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

   190

			}

   191

			return _eco->GetPrice(CEconomy::REMOVE_ROAD) * 2;

   192

		}

   193

   194

		default:

   195

		case ROAD_TILE_DEPOT:

   196

			return CMD_ERROR;

   197

	}

   198

}

   199

   200

   201

static const RoadBits _valid_tileh_slopes_road[][15] = {

   202

	/* set of normal ones */

   203

	{

   204

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   205

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

   206

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   207

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

   208

		ROAD_X,   ROAD_NONE, ROAD_NONE

   209

	},

   210

	/* allowed road for an evenly raised platform */

   211

	{

   212

		ROAD_NONE,

   213

		ROAD_SW | ROAD_NW,

   214

		ROAD_SW | ROAD_SE,

   215

		ROAD_Y  | ROAD_SW,

   216

   217

		ROAD_SE | ROAD_NE, // 4

   218

		ROAD_ALL,

   219

		ROAD_X  | ROAD_SE,

   220

		ROAD_ALL,

   221

   222

		ROAD_NW | ROAD_NE, // 8

   223

		ROAD_X  | ROAD_NW,

   224

		ROAD_ALL,

   225

		ROAD_ALL,

   226

   227

		ROAD_Y  | ROAD_NE, // 12

   228

		ROAD_ALL,

   229

		ROAD_ALL

   230

	},

   231

};

   232

   233

   234

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

   235

{

   236

	RoadBits road_bits;

   237

   238

	if (IsSteepSlope(tileh)) {

   239

		if (existing == 0) {

   240

			/* force full pieces. */

   241

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

   242

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

   243

			if (*pieces == ROAD_X || *pieces == ROAD_Y) return _eco->GetPrice(CEconomy::TERRAFORM);

   244

		}

   245

		return CMD_ERROR;

   246

	}

   247

	road_bits = *pieces | existing;

   248

   249

	/* no special foundation */

   250

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

   251

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

   252

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

   253

		return 0; // no extra cost

   254

	}

   255

   256

	/* foundation is used. Whole tile is leveled up */

   257

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

   258

		return existing != 0 ? 0 : _eco->GetPrice(CEconomy::TERRAFORM);

   259

	}

   260

   261

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

   262

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

   263

		/* force full pieces. */

   264

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

   265

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

   266

		if (*pieces == ROAD_X || *pieces == ROAD_Y) return _eco->GetPrice(CEconomy::TERRAFORM);

   267

	}

   268

	return CMD_ERROR;

   269

}

   270

   271

/** Build a piece of road.

   272

 * @param tile tile where to build road

   273

 * @param flags operation to perform

   274

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

   276

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

   277

 */

   278

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

   279

{

   280

	int32 cost = 0;

   281

	int32 ret;

   282

	RoadBits existing = ROAD_NONE;

   283

	Slope tileh;

   284

   285

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   286

   287

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

   288

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

   289

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

   290

   291

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

   292

   296

	tileh = GetTileSlope(tile, NULL);

   297

   298

	switch (GetTileType(tile)) {

   299

		case MP_STREET:

   300

			switch (GetRoadTileType(tile)) {

   301

				case ROAD_TILE_NORMAL:

   302

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

   304

   306

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

   307

						return_cmd_error(STR_1007_ALREADY_BUILT);

   308

					}

   309

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   310

					break;

   311

   312

				case ROAD_TILE_CROSSING:

   316

   317

				default:

   318

				case ROAD_TILE_DEPOT:

   319

					goto do_clear;

   320

			}

   321

			break;

   322

   323

		case MP_RAILWAY: {

   324

			Axis roaddir;

   325

   326

			if (IsSteepSlope(tileh)) {

   327

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   328

			}

   329

   330

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

   331

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

   332

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

   333

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   334

			}

   335

#undef M

   336

   337

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

   338

			switch (GetTrackBits(tile)) {

   339

				case TRACK_BIT_X:

   340

					if (pieces & ROAD_X) goto do_clear;

   341

					roaddir = AXIS_Y;

   342

					break;

   343

   344

				case TRACK_BIT_Y:

   345

					if (pieces & ROAD_Y) goto do_clear;

   346

					roaddir = AXIS_X;

   347

					break;

   348

   349

				default: goto do_clear;

   350

			}

   351

   352

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   353

   354

			if (flags & DC_EXEC) {

   355

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

   357

				MarkTileDirtyByTile(tile);

   358

			}

   359

			/** @todo should be more expensive */

   360

			return _eco->GetPrice(CEconomy::BUILD_ROAD) * 2;

   361

		}

   362

   363

		default:

   364

do_clear:;

   365

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

   366

			if (CmdFailed(ret)) return ret;

   367

			cost += ret;

   368

	}

   369

   370

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

   371

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

   372

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

   373

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

   374

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   375

   376

	cost += ret;

   377

   378

	if (IsTileType(tile, MP_STREET)) {

   379

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

   380

		pieces &= ComplementRoadBits(existing);

   381

		cost += CountRoadBits(pieces) * _eco->GetPrice(CEconomy::BUILD_ROAD);

   382

	} else {

   383

		cost += _eco->GetPrice(CEconomy::BUILD_ROAD, tile); /* the first road bit purchases us the tile */

   384

		cost += (CountRoadBits(pieces) - 1) * _eco->GetPrice(CEconomy::BUILD_ROAD);

   385

	}

   386

   387

   388

	if (flags & DC_EXEC) {

   389

		if (IsTileType(tile, MP_STREET)) {

   395

		} else {

   397

		}

   398

   399

		MarkTileDirtyByTile(tile);

   400

	}

   401

	return cost;

   402

}

   403

   404

/**

   405

 * Switches the rail type on a level crossing.

   406

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

   407

 * @param totype      The railtype we want to convert to

   408

 * @param exec        Switches between test and execute mode

   409

 * @return            The cost and state of the operation

   410

 * @retval CMD_ERROR  An error occured during the operation.

   411

 */

   412

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

   413

{

   414

	/* not a railroad crossing? */

   415

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   416

   417

	/* not owned by me? */

   418

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

   419

   420

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

   421

   422

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

   423

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

   424

   425

	if (exec) {

   426

		SetRailType(tile, totype);

   427

		MarkTileDirtyByTile(tile);

   428

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

   429

	}

   430

   431

	return _eco->GetPrice(CEconomy::PRICE_RAIL_BUILD) / 2;

   432

}

   433

   434

   435

/** Build a long piece of road.

   436

 * @param end_tile end tile of drag

   437

 * @param flags operation to perform

   438

 * @param p1 start tile of drag

   439

 * @param p2 various bitstuffed elements

   440

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

   441

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

   442

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

   444

 */

   445

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

   446

{

   447

	TileIndex start_tile, tile;

   448

	int32 cost, ret;

   449

   450

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   451

   452

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

   453

   454

	start_tile = p1;

   457

   458

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

   459

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

   460

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

   461

   462

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

   463

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

   464

		TileIndex t = start_tile;

   465

		start_tile = end_tile;

   466

		end_tile = t;

   467

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

   468

	}

   469

   470

	cost = 0;

   471

	tile = start_tile;

   472

	/* Start tile is the small number. */

   473

	for (;;) {

   474

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

   475

   476

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

   477

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

   478

   480

		if (CmdFailed(ret)) {

   481

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   482

			_error_message = INVALID_STRING_ID;

   483

		} else {

   484

			cost += ret;