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 "sprite.h"

     9

#include "table/sprites.h"

    10

#include "table/strings.h"

    11

#include "functions.h"

    12

#include "map.h"

    13

#include "tile.h"

    14

#include "town_map.h"

    15

#include "vehicle.h"

    16

#include "viewport.h"

    17

#include "command.h"

    18

#include "player.h"

    19

#include "town.h"

    20

#include "gfx.h"

    21

#include "sound.h"

    22

#include "yapf/yapf.h"

    23

#include "depot.h"

    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

	Owner 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 (!IsValidPlayer(_current_player)) return true;

    49

    50

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

    51

    52

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

    53

	// by a town

    54

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

    55

    56

	if (_cheats.magic_bulldozer.value) return true;

    57

    58

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

    59

	n = ROAD_NONE;

    60

	present = GetAnyRoadBits(tile);

    61

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

    62

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

    63

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

    64

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

    65

    66

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

    67

	// then allow it

    68

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

    69

		Town *t;

    70

		*edge_road = false;

    71

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

    72

		if (_patches.extra_dynamite) return true;

    73

    74

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    75

    76

		SetDParam(0, t->index);

    77

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    78

		return false;

    79

	}

    80

    81

	return true;

    82

}

    83

    84

    85

/** Delete a piece of road.

    86

 * @param tile tile where to remove road from

    87

 * @param p1 road piece flags

    88

 * @param p2 unused

    89

 */

    90

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

    91

{

    92

	// cost for removing inner/edge -roads

    93

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

    94

    95

	Owner owner;

    96

	Town *t;

    97

	/* true if the roadpiece was always removeable,

    98

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

    99

	bool edge_road;

   100

	RoadBits pieces;

   101

   102

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   103

   104

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

   105

	if (p1 >> 4) return CMD_ERROR;

   106

	pieces = (RoadBits)p1;

   107

   108

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

   109

   110

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

   111

   112

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

   113

		t = GetTownByTile(tile);

   114

	} else {

   115

		t = NULL;

   116

	}

   117

   118

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

   119

   120

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   121

   122

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

   123

	// removal allowance depends on difficulty setting

   124

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

   125

   126

	switch (GetRoadTileType(tile)) {

   127

		case ROAD_TILE_NORMAL: {

   128

			RoadBits present = GetRoadBits(tile);

   129

			RoadBits c = pieces;

   130

   131

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

   132

   133

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

   134

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

   135

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

   136

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

   137

			}

   138

   139

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

   140

			c &= present;

   141

			if (c == 0) return CMD_ERROR;

   142

   143

			if (flags & DC_EXEC) {

   144

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

   145

   146

				present ^= c;

   147

				if (present == 0) {

   148

					DoClearSquare(tile);

   149

				} else {

   150

					SetRoadBits(tile, present);

   151

					MarkTileDirtyByTile(tile);

   152

				}

   153

			}

   154

			return CountRoadBits(c) * _price.remove_road;

   155

		}

   156

   157

		case ROAD_TILE_CROSSING: {

   158

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

   159

				return CMD_ERROR;

   160

			}

   161

   162

			if (flags & DC_EXEC) {

   163

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

   164

   165

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

   166

				MarkTileDirtyByTile(tile);

   167

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

   168

			}

   169

			return _price.remove_road * 2;

   170

		}

   171

   172

		default:

   173

		case ROAD_TILE_DEPOT:

   174

			return CMD_ERROR;

   175

	}

   176

}

   177

   178

   179

static const RoadBits _valid_tileh_slopes_road[][15] = {

   180

	// set of normal ones

   181

	{

   182

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   183

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

   184

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   185

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

   186

		ROAD_X,   ROAD_NONE, ROAD_NONE

   187

	},

   188

	// allowed road for an evenly raised platform

   189

	{

   190

		ROAD_NONE,

   191

		ROAD_SW | ROAD_NW,

   192

		ROAD_SW | ROAD_SE,

   193

		ROAD_Y  | ROAD_SW,

   194

   195

		ROAD_SE | ROAD_NE, // 4

   196

		ROAD_ALL,

   197

		ROAD_X  | ROAD_SE,

   198

		ROAD_ALL,

   199

   200

		ROAD_NW | ROAD_NE, // 8

   201

		ROAD_X  | ROAD_NW,

   202

		ROAD_ALL,

   203

		ROAD_ALL,

   204

   205

		ROAD_Y  | ROAD_NE, // 12

   206

		ROAD_ALL,

   207

		ROAD_ALL

   208

	},

   209

};

   210

   211

   212

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

   213

{

   214

	RoadBits road_bits;

   215

   216

	if (IsSteepSlope(tileh)) {

   217

		if (existing == 0) {

   218

			// force full pieces.

   219

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

   220

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

   221

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

   222

		}

   223

		return CMD_ERROR;

   224

	}

   225

	road_bits = *pieces | existing;

   226

   227

	// no special foundation

   228

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

   229

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

   230

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

   231

		return 0; // no extra cost

   232

	}

   233

   234

	// foundation is used. Whole tile is leveled up

   235

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

   236

		return existing != 0 ? 0 : _price.terraform;

   237

	}

   238

   239

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

   240

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

   241

		// force full pieces.

   242

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

   243

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

   244

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

   245

	}

   246

	return CMD_ERROR;

   247

}

   248

   249

/** Build a piece of road.

   250

 * @param tile tile where to build road

   251

 * @param p1 road piece flags

   252

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

   253

 */

   254

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

   255

{

   256

	int32 cost = 0;

   257

	int32 ret;

   258

	RoadBits existing = ROAD_NONE;

   259

	RoadBits pieces;

   260

	Slope tileh;

   261

   262

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   263

   264

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

   265

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

   266

	if ((p1 >> 4) || (IsValidPlayer(_current_player) && p2 != 0) || !IsValidTownID(p2)) return CMD_ERROR;

   267

	pieces = (RoadBits)p1;

   268

   269

	tileh = GetTileSlope(tile, NULL);

   270

   271

	switch (GetTileType(tile)) {

   272

		case MP_STREET:

   273

			switch (GetRoadTileType(tile)) {

   274

				case ROAD_TILE_NORMAL:

   275

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

   276

   277

					existing = GetRoadBits(tile);

   278

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

   279

						return_cmd_error(STR_1007_ALREADY_BUILT);

   280

					}

   281

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   282

					break;

   283

   284

				case ROAD_TILE_CROSSING:

   285

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

   286

						return_cmd_error(STR_1007_ALREADY_BUILT);

   287

					}

   288

					goto do_clear;

   289

   290

				default:

   291

				case ROAD_TILE_DEPOT:

   292

					goto do_clear;

   293

			}

   294

			break;

   295

   296

		case MP_RAILWAY: {

   297

			Axis roaddir;

   298

   299

			if (IsSteepSlope(tileh)) {

   300

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   301

			}

   302

   303

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

   304

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

   305

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

   306

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   307

			}

   308

#undef M

   309

   310

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

   311

			switch (GetTrackBits(tile)) {

   312

				case TRACK_BIT_X:

   313

					if (pieces & ROAD_X) goto do_clear;

   314

					roaddir = AXIS_Y;

   315

					break;

   316

   317

				case TRACK_BIT_Y:

   318

					if (pieces & ROAD_Y) goto do_clear;

   319

					roaddir = AXIS_X;

   320

					break;

   321

   322

				default: goto do_clear;

   323

			}

   324

   325

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   326

   327

			if (flags & DC_EXEC) {

   328

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

   329

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

   330

				MarkTileDirtyByTile(tile);

   331

			}

   332

			return _price.build_road * 2;

   333

		}

   334

   335

		default:

   336

do_clear:;

   337

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

   338

			if (CmdFailed(ret)) return ret;

   339

			cost += ret;

   340

	}

   341

   342

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

   343

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

   344

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

   345

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

   346

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   347

   348

	cost += ret;

   349

   350

	if (IsTileType(tile, MP_STREET)) {

   351

		// Don't put the pieces that already exist

   352

		pieces &= ComplementRoadBits(existing);

   353

	}

   354

   355

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

   356

   357

	if (flags & DC_EXEC) {

   358

		if (IsTileType(tile, MP_STREET)) {

   359

			SetRoadBits(tile, existing | pieces);

   360

		} else {

   361

			MakeRoadNormal(tile, _current_player, pieces, p2);

   362

		}

   363

   364

		MarkTileDirtyByTile(tile);

   365

	}

   366

	return cost;

   367

}

   368

   369

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

   370

{

   371

	// not a railroad crossing?

   372

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   373

   374

	// not owned by me?

   375

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

   376

   377

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

   378

   379

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

   380

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

   381

   382

	if (exec) {

   383

		SetRailTypeCrossing(tile, totype);

   384

		MarkTileDirtyByTile(tile);

   385

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

   386

	}

   387

   388

	return _price.build_rail >> 1;

   389

}

   390

   391

   392

/** Build a long piece of road.

   393

 * @param end_tile end tile of drag

   394

 * @param p1 start tile of drag

   395

 * @param p2 various bitstuffed elements

   396

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

   397

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

   398

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

   399

 */

   400

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

   401

{

   402

	TileIndex start_tile, tile;

   403

	int32 cost, ret;

   404

   405

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   406

   407

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

   408

   409

	start_tile = p1;

   410

   411

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

   412

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

   413

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

   414

   415

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

   416

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

   417

		TileIndex t = start_tile;

   418

		start_tile = end_tile;

   419

		end_tile = t;

   420

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

   421

	}

   422

   423

	cost = 0;

   424

	tile = start_tile;

   425

	// Start tile is the small number.

   426

	for (;;) {

   427

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

   428

   429

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

   430

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

   431

   432

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

   433

		if (CmdFailed(ret)) {

   434

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   435

			_error_message = INVALID_STRING_ID;

   436

		} else {

   437

			cost += ret;

   438

		}

   439

   440

		if (tile == end_tile) break;

   441

   442

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

   443

	}

   444

   445

	return (cost == 0) ? CMD_ERROR : cost;

   446

}

   447

   448

/** Remove a long piece of road.

   449

 * @param end_tile end tile of drag

   450

 * @param p1 start tile of drag

   451

 * @param p2 various bitstuffed elements

   452

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

   453

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

   454

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

   455

 */

   456

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

   457

{

   458

	TileIndex start_tile, tile;

   459

	int32 cost, ret;

   460

   461

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   462

   463

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

   464

   465

	start_tile = p1;

   466

   467

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

   468

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

   469

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

   470

   471

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

   472

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

   473

		TileIndex t = start_tile;

   474

		start_tile = end_tile;

   475

		end_tile = t;

   476

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

   477

	}

   478

   479

	cost = 0;

   480

	tile = start_tile;

   481

	// Start tile is the small number.

   482

	for (;;) {

   483

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

   484

   485

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

   486

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

   487

   488

		// try to remove the halves.