1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

     6

#include "bridge.h"

     7

#include "cmd_helper.h"

     8

#include "rail_map.h"

     9

#include "road_map.h"

    10

#include "sprite.h"

    11

#include "table/sprites.h"

    12

#include "table/strings.h"

    13

#include "functions.h"

    14

#include "map.h"

    15

#include "landscape.h"

    16

#include "tile.h"

    17

#include "town_map.h"

    18

#include "vehicle.h"

    19

#include "viewport.h"

    20

#include "command.h"

    21

#include "player.h"

    22

#include "town.h"

    23

#include "gfx.h"

    24

#include "sound.h"

    25

#include "yapf/yapf.h"

    26

#include "depot.h"

    27

    28

    29

static uint CountRoadBits(RoadBits r)

    30

{

    31

	uint count = 0;

    32

    33

	if (r & ROAD_NW) ++count;

    34

	if (r & ROAD_SW) ++count;

    35

	if (r & ROAD_SE) ++count;

    36

	if (r & ROAD_NE) ++count;

    37

	return count;

    38

}

    39

    40

    41

bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, bool *edge_road)

    42

{

    43

	RoadBits present;

    44

	RoadBits n;

    45

	*edge_road = true;

    46

    47

	if (_game_mode == GM_EDITOR) return true;

    48

    49

	// Only do the special processing for actual players.

    50

	if (!IsValidPlayer(_current_player)) return true;

    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, (uint)-1);

    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

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

    85

{

    86

	return CheckAllowRemoveRoad(tile, remove, IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile), edge_road);

    87

}

    88

    89

/** Delete a piece of road.

    90

 * @param tile tile where to remove road from

    91

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

    92

 * @param p2 unused

    93

 */

    94

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

    95

{

    96

	// cost for removing inner/edge -roads

    97

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

    98

    99

	Owner owner;

   100

	Town *t;

   101

	/* true if the roadpiece was always removeable,

   102

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

   103

	bool edge_road;

   104

   105

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   106

   107

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

   108

   109

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

   110

   111

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

   112

		t = GetTownByTile(tile);

   113

	} else {

   114

		t = NULL;

   115

	}

   116

   117

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

   118

   119

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

   120

   121

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   122

   123

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

   124

	// removal allowance depends on difficulty setting

   125

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

   126

   127

	switch (GetRoadTileType(tile)) {

   128

		case ROAD_TILE_NORMAL: {

   129

			RoadBits present = GetRoadBits(tile);

   130

			RoadBits c = pieces;

   131

   132

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

   133

   134

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

   135

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

   136

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

   137

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

   138

			}

   139

   140

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

   141

			c &= present;

   142

			if (c == 0) return CMD_ERROR;

   143

   144

			if (flags & DC_EXEC) {

   145

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

   146

   147

				present ^= c;

   148

				if (present == 0) {

   149

					DoClearSquare(tile);

   150

				} else {

   151

					SetRoadBits(tile, present);

   152

					MarkTileDirtyByTile(tile);

   153

				}

   154

			}

   155

			return CountRoadBits(c) * _price.remove_road;

   156

		}

   157

   158

		case ROAD_TILE_CROSSING: {

   159

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

   160

				return CMD_ERROR;

   161

			}

   162

   163

			if (flags & DC_EXEC) {

   164

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

   165

   166

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

   167

				MarkTileDirtyByTile(tile);

   168

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

   169

			}

   170

			return _price.remove_road * 2;

   171

		}

   172

   173

		default:

   174

		case ROAD_TILE_DEPOT:

   175

			return CMD_ERROR;

   176

	}

   177

}

   178

   179

   180

static const RoadBits _valid_tileh_slopes_road[][15] = {

   181

	// set of normal ones

   182

	{

   183

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   184

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

   185

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   186

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

   187

		ROAD_X,   ROAD_NONE, ROAD_NONE

   188

	},

   189

	// allowed road for an evenly raised platform

   190

	{

   191

		ROAD_NONE,

   192

		ROAD_SW | ROAD_NW,

   193

		ROAD_SW | ROAD_SE,

   194

		ROAD_Y  | ROAD_SW,

   195

   196

		ROAD_SE | ROAD_NE, // 4

   197

		ROAD_ALL,

   198

		ROAD_X  | ROAD_SE,

   199

		ROAD_ALL,

   200

   201

		ROAD_NW | ROAD_NE, // 8

   202

		ROAD_X  | ROAD_NW,

   203

		ROAD_ALL,

   204

		ROAD_ALL,

   205

   206

		ROAD_Y  | ROAD_NE, // 12

   207

		ROAD_ALL,

   208

		ROAD_ALL

   209

	},

   210

};

   211

   212

   213

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

   214

{

   215

	RoadBits road_bits;

   216

   217

	if (IsSteepSlope(tileh)) {

   218

		if (existing == 0) {

   219

			// force full pieces.

   220

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

   221

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

   222

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

   223

		}

   224

		return CMD_ERROR;

   225

	}

   226

	road_bits = *pieces | existing;

   227

   228

	// no special foundation

   229

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

   230

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

   231

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

   232

		return 0; // no extra cost

   233

	}

   234

   235

	// foundation is used. Whole tile is leveled up

   236

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

   237

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

   238

	}

   239

   240

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

   241

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

   242

		// force full pieces.

   243

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

   244

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

   245

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

   246

	}

   247

	return CMD_ERROR;

   248

}

   249

   250

/** Build a piece of road.

   251

 * @param tile tile where to build road

   252

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

   253

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

   254

 */

   255

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

   256

{

   257

	int32 cost = 0;

   258

	int32 ret;

   259

	RoadBits existing = ROAD_NONE;

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

   267

   268

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

   269

   270

	tileh = GetTileSlope(tile, NULL);

   271

   272

	switch (GetTileType(tile)) {

   273

		case MP_STREET:

   274

			switch (GetRoadTileType(tile)) {

   275

				case ROAD_TILE_NORMAL:

   276

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

   277

   278

					existing = GetRoadBits(tile);

   279

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

   280

						return_cmd_error(STR_1007_ALREADY_BUILT);

   281

					}

   282

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   283

					break;

   284

   285

				case ROAD_TILE_CROSSING:

   286

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

   287

						return_cmd_error(STR_1007_ALREADY_BUILT);

   288

					}

   289

					goto do_clear;

   290

   291

				default:

   292

				case ROAD_TILE_DEPOT:

   293

					goto do_clear;

   294

			}

   295

			break;

   296

   297

		case MP_RAILWAY: {

   298

			Axis roaddir;

   299

   300

			if (IsSteepSlope(tileh)) {

   301

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   302

			}

   303

   304

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

   305

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

   306

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

   307

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   308

			}

   309

#undef M

   310

   311

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

   312

			switch (GetTrackBits(tile)) {

   313

				case TRACK_BIT_X:

   314

					if (pieces & ROAD_X) goto do_clear;

   315

					roaddir = AXIS_Y;

   316

					break;

   317

   318

				case TRACK_BIT_Y:

   319

					if (pieces & ROAD_Y) goto do_clear;

   320

					roaddir = AXIS_X;

   321

					break;

   322

   323

				default: goto do_clear;

   324

			}

   325

   326

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   327

   328

			if (flags & DC_EXEC) {

   329

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

   330

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

   331

				MarkTileDirtyByTile(tile);

   332

			}

   333

			return _price.build_road * 2;

   334

		}

   335

   336

		default:

   337

do_clear:;

   338

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

   339

			if (CmdFailed(ret)) return ret;

   340

			cost += ret;

   341

	}

   342

   343

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

   344

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

   345

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

   346

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

   347

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   348

   349

	cost += ret;

   350

   351

	if (IsTileType(tile, MP_STREET)) {

   352

		// Don't put the pieces that already exist

   353

		pieces &= ComplementRoadBits(existing);

   354

	}

   355

   356

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

   357

   358

	if (flags & DC_EXEC) {

   359

		if (IsTileType(tile, MP_STREET)) {

   360

			SetRoadBits(tile, existing | pieces);

   361

		} else {

   362

			MakeRoadNormal(tile, _current_player, pieces, p2);

   363

		}

   364

   365

		MarkTileDirtyByTile(tile);

   366

	}

   367

	return cost;

   368

}

   369

   378

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

   379

{

   380

	// not a railroad crossing?

   381

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   382

   383

	// not owned by me?

   384

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

   385

   386

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

   387

   388

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

   389

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

   390

   391

	if (exec) {

   392

		SetRailType(tile, totype);

   393

		MarkTileDirtyByTile(tile);

   394

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

   395

	}

   396

   398

}

   399

   400

   401

/** Build a long piece of road.

   402

 * @param end_tile end tile of drag

   403

 * @param p1 start tile of drag

   404

 * @param p2 various bitstuffed elements

   405

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

   406

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

   407

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

   408

 */

   409

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

   410

{

   411

	TileIndex start_tile, tile;

   412

	int32 cost, ret;

   413

   414

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   415

   416

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

   417

   418

	start_tile = p1;

   419

   420

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

   421

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

   422

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

   423

   424

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

   425

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

   426

		TileIndex t = start_tile;

   427

		start_tile = end_tile;

   428

		end_tile = t;

   429

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

   430

	}

   431

   432

	cost = 0;

   433

	tile = start_tile;

   434

	// Start tile is the small number.

   435

	for (;;) {

   436

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

   437

   438

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

   439

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

   440

   441

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

   442

		if (CmdFailed(ret)) {

   443

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   444

			_error_message = INVALID_STRING_ID;

   445

		} else {

   446

			cost += ret;

   447

		}

   448

   449

		if (tile == end_tile) break;

   450

   451

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

   452

	}

   453

   454

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

   455

}

   456

   457

/** Remove a long piece of road.

   458

 * @param end_tile end tile of drag

   459

 * @param p1 start tile of drag

   460

 * @param p2 various bitstuffed elements

   461

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

   462

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

   463

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

   464

 */

   465

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

   466

{

   467

	TileIndex start_tile, tile;

   468

	int32 cost, ret;

   469

   470

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   471

   472

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

   473

   474

	start_tile = p1;

   475

   476

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

   477

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

   478

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

   479

   480

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

   481

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

   482

		TileIndex t = start_tile;

   483

		start_tile = end_tile;

   484

		end_tile = t;

   485

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

   486

	}

   487

   488

	cost = 0;