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"

    29

#include "newgrf.h"

    30

#include "station_map.h"

    31

#include "tunnel_map.h"

    32

    33

    34

static uint CountRoadBits(RoadBits r)

    35

{

    36

	uint count = 0;

    37

    38

	if (r & ROAD_NW) ++count;

    39

	if (r & ROAD_SW) ++count;

    40

	if (r & ROAD_SE) ++count;

    41

	if (r & ROAD_NE) ++count;

    42

	return count;

    43

}

    44

    45

    46

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

    47

{

    48

	RoadBits present;

    49

	RoadBits n;

    50

	*edge_road = true;

    51

    52

	if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return true;

    53

    54

	/* Water can always flood and towns can always remove "normal" road pieces.

    55

	 * Towns are not be allowed to remove non "normal" road pieces, like tram

    56

	 * tracks as that would result in trams that cannot turn. */

    57

	if (_current_player == OWNER_WATER ||

    58

			(rt == ROADTYPE_ROAD && !IsValidPlayer(_current_player))) return true;

    59

    60

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

    61

	 * by a town */

    62

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

    63

    64

	if (_cheats.magic_bulldozer.value) return true;

    65

    66

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

    67

	n = ROAD_NONE;

    68

	present = GetAnyRoadBits(tile, rt);

    69

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

    70

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

    71

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

    72

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

    73

    74

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

    75

	 * then allow it */

    76

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

    77

		Town *t;

    78

		*edge_road = false;

    79

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

    80

		if (_patches.extra_dynamite) return true;

    81

    82

		t = ClosestTownFromTile(tile, (uint)-1);

    83

    84

		SetDParam(0, t->index);

    85

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    86

		return false;

    87

	}

    88

    89

	return true;

    90

}

    91

    92

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

    93

{

    94

	return CheckAllowRemoveRoad(tile, remove, GetRoadOwner(tile, rt), edge_road, rt);

    95

}

    96

    97

/** Delete a piece of road.

    98

 * @param tile tile where to remove road from

    99

 * @param flags operation to perform

   100

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

   101

 *           bit 4..5 road type

   102

 * @param p2 unused

   103

 */

   104

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

   105

{

   106

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

   107

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

   108

   109

	Town *t;

   110

	/* true if the roadpiece was always removeable,

   111

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

   112

	bool edge_road;

   113

   114

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   115

   116

	RoadType rt = (RoadType)GB(p1, 4, 2);

   117

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   118

   119

	Owner owner;

   120

	switch (GetTileType(tile)) {

   121

		case MP_STREET:

   122

			owner = GetRoadOwner(tile, rt);

   123

			break;

   124

   125

		case MP_STATION:

   126

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   127

			owner = GetTileOwner(tile);

   128

			break;

   129

   130

		case MP_TUNNELBRIDGE:

   131

			if ((IsTunnel(tile) && GetTunnelTransportType(tile) != TRANSPORT_ROAD) ||

   132

					(IsBridge(tile) && GetBridgeTransportType(tile) != TRANSPORT_ROAD)) return CMD_ERROR;

   133

			owner = GetTileOwner(tile);

   134

			break;

   135

   136

		default:

   137

			return CMD_ERROR;

   138

	}

   139

   140

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

   141

		t = GetTownByTile(tile);

   142

	} else {

   143

		t = NULL;

   144

	}

   145

   146

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

   147

	RoadTypes rts = GetRoadTypes(tile);

   148

	/* The tile doesn't have the given road type */

   149

	if (!HASBIT(rts, rt)) return CMD_ERROR;

   150

   151

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

   152

   153

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   154

   155

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

   156

	 * removal allowance depends on difficulty setting */

   157

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

   158

   159

	if (!IsTileType(tile, MP_STREET)) {

   160

		/* If it's the last roadtype, just clear the whole tile */

   161

		if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   162

   163

		int32 cost;

   164

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   165

			TileIndex other_end = IsTunnel(tile) ? GetOtherTunnelEnd(tile) : GetOtherBridgeEnd(tile);

   166

			/* Pay for *every* tile of the bridge or tunnel */

   167

			cost = (DistanceManhattan(IsTunnel(tile) ? GetOtherTunnelEnd(tile) : GetOtherBridgeEnd(tile), tile) + 1) * _price.remove_road;

   168

			if (flags & DC_EXEC) {

   169

				SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));

   170

				SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));

   171

   172

				/* Mark tiles diry that have been repaved */

   173

				MarkTileDirtyByTile(tile);

   174

				MarkTileDirtyByTile(other_end);

   175

				if (IsBridge(tile)) {

   176

					TileIndexDiff delta = TileOffsByDiagDir(GetBridgeRampDirection(tile));

   177

   178

					for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);

   179

				}

   180

			}

   181

		} else {

   182

			cost = _price.remove_road;

   183

			if (flags & DC_EXEC) {

   184

				SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));

   185

				MarkTileDirtyByTile(tile);

   186

			}

   187

		}

   188

		return cost;

   189

	}

   190

   191

	switch (GetRoadTileType(tile)) {

   192

		case ROAD_TILE_NORMAL: {

   193

			RoadBits present = GetRoadBits(tile, rt);

   194

			RoadBits c = pieces;

   195

   196

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

   197

   198

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

   199

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

   200

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

   201

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

   202

			}

   203

   204

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

   205

			c &= present;

   206

			if (c == ROAD_NONE) return CMD_ERROR;

   207

   208

			if (flags & DC_EXEC) {

   209

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

   210

   211

				present ^= c;

   212

				if (present == ROAD_NONE) {

   213

					RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));

   214

					if (rts == ROADTYPES_NONE) {

   215

						DoClearSquare(tile);

   216

					} else {

   217

						SetRoadBits(tile, ROAD_NONE, rt);

   218

						SetRoadTypes(tile, rts);

   219

					}

   220

				} else {

   221

					/* When bits are removed, you *always* end up with something that

   222

					 * is not a complete straight road tile. However, trams do not have

   223

					 * onewayness, so they cannot remove it either. */

   224

					if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);

   225

					SetRoadBits(tile, present, rt);

   226

					MarkTileDirtyByTile(tile);

   227

				}

   228

			}

   229

			return CountRoadBits(c) * _price.remove_road;

   230

		}

   231

   232

		case ROAD_TILE_CROSSING: {

   233

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

   234

				return CMD_ERROR;

   235

			}

   236

   237

			/* Don't allow road to be removed from the crossing when there is tram;

   238

			 * we can't draw the crossing without trambits ;) */

   239

			if (rt == ROADTYPE_ROAD && HASBIT(GetRoadTypes(tile), ROADTYPE_TRAM)) return CMD_ERROR;

   240

   241

			if (flags & DC_EXEC) {

   242

				if (rt == ROADTYPE_ROAD) {

   243

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

   244

				}

   245

   246

				RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));

   247

				if (rts == ROADTYPES_NONE) {

   248

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

   249

				} else {

   250

					SetRoadTypes(tile, rts);

   251

				}

   252

				MarkTileDirtyByTile(tile);

   253

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

   254

			}

   255

			return _price.remove_road * 2;

   256

		}

   257

   258

		default:

   259

		case ROAD_TILE_DEPOT:

   260

			return CMD_ERROR;

   261

	}

   262

}

   263

   264

   265

static const RoadBits _valid_tileh_slopes_road[][15] = {

   266

	/* set of normal ones */

   267

	{

   268

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   269

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

   270

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   271

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

   272

		ROAD_X,   ROAD_NONE, ROAD_NONE

   273

	},

   274

	/* allowed road for an evenly raised platform */

   275

	{

   276

		ROAD_NONE,

   277

		ROAD_SW | ROAD_NW,

   278

		ROAD_SW | ROAD_SE,

   279

		ROAD_Y  | ROAD_SW,

   280

   281

		ROAD_SE | ROAD_NE, // 4

   282

		ROAD_ALL,

   283

		ROAD_X  | ROAD_SE,

   284

		ROAD_ALL,

   285

   286

		ROAD_NW | ROAD_NE, // 8

   287

		ROAD_X  | ROAD_NW,

   288

		ROAD_ALL,

   289

		ROAD_ALL,

   290

   291

		ROAD_Y  | ROAD_NE, // 12

   292

		ROAD_ALL,

   293

		ROAD_ALL

   294

	},

   295

};

   296

   297

   298

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

   299

{

   300

	RoadBits road_bits;

   301

   302

	if (IsSteepSlope(tileh)) {

   303

		if (existing == 0) {

   304

			/* force full pieces. */

   305

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

   306

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

   307

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

   308

		}

   309

		return CMD_ERROR;

   310

	}

   311

	road_bits = *pieces | existing;

   312

   313

	/* no special foundation */

   314

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

   315

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

   316

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

   317

		return 0; // no extra cost

   318

	}

   319

   320

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

   321

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

   322

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

   323

	}

   324

   325

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

   326

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

   327

		/* force full pieces. */

   328

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

   329

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

   330

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

   331

	}

   332

	return CMD_ERROR;

   333

}

   334

   335

/** Build a piece of road.

   336

 * @param tile tile where to build road

   337

 * @param flags operation to perform

   338

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

   339

 *           bit 4..5 road type

   340

 *           bit 6..7 disallowed directions to toggle

   341

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

   342

 */

   343

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

   344

{

   345

	int32 cost = 0;

   346

	int32 ret;

   347

	RoadBits existing = ROAD_NONE;

   348

	RoadBits all_bits = ROAD_NONE;

   349

	Slope tileh;

   350

   351

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   352

   353

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

   354

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

   355

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

   356

   357

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

   358

   359

	RoadType rt = (RoadType)GB(p1, 4, 2);

   360

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   361

   362

	DisallowedRoadDirections toggle_drd = (DisallowedRoadDirections)GB(p1, 6, 2);

   363

   364

	tileh = GetTileSlope(tile, NULL);

   365

   366

	switch (GetTileType(tile)) {

   367

		case MP_STREET:

   368

			switch (GetRoadTileType(tile)) {

   369

				case ROAD_TILE_NORMAL: {

   370

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

   371

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   372

   373

					all_bits = GetAllRoadBits(tile);

   374

					if (!HASBIT(GetRoadTypes(tile), rt)) break;

   375

   376

					existing = GetRoadBits(tile, rt);

   377

					RoadBits merged = existing | pieces;

   380

						/* Junctions cannot be one-way */

   381

						return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   382

					}

   383

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

   384

						/* We only want to set the (dis)allowed road directions */

   385

						if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM && GetRoadOwner(tile, ROADTYPE_ROAD) == _current_player) {

   386

							if (crossing) return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   387

   388

							/* Ignore half built tiles */

   389

							if (flags & DC_EXEC && rt != ROADTYPE_TRAM && (existing == ROAD_X || existing == ROAD_Y)) {

   390

								SetDisallowedRoadDirections(tile, GetDisallowedRoadDirections(tile) ^ toggle_drd);

   391

								MarkTileDirtyByTile(tile);

   392

							}

   393

							return 0;

   394

						}

   395

						return_cmd_error(STR_1007_ALREADY_BUILT);

   396

					}

   397

				} break;

   398

   399

				case ROAD_TILE_CROSSING:

   400

					if (HASBIT(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);

   401

					all_bits = GetCrossingRoadBits(tile);

   402

					if (pieces & ComplementRoadBits(all_bits)) goto do_clear;

   403

					break;

   404

   405

				default:

   406

				case ROAD_TILE_DEPOT:

   407

					goto do_clear;

   408

			}

   409

			break;

   410

   411

		case MP_RAILWAY: {

   412

			Axis roaddir;

   413

   414

			if (IsSteepSlope(tileh)) {

   415

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   416

			}

   417

   418

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

   419

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

   420

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

   421

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   422

			}

   423

#undef M

   424

   425

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

   426

			switch (GetTrackBits(tile)) {

   427

				case TRACK_BIT_X:

   428

					if (pieces & ROAD_X) goto do_clear;

   429

					roaddir = AXIS_Y;

   430

					break;

   431

   432

				case TRACK_BIT_Y:

   433

					if (pieces & ROAD_Y) goto do_clear;

   434

					roaddir = AXIS_X;

   435

					break;

   436

   437

				default: goto do_clear;

   438

			}

   439

   440

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   441

   442

			if (flags & DC_EXEC) {

   443

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

   444

				/* Always add road to the roadtypes (can't draw without it) */

   445

				MakeRoadCrossing(tile, _current_player, _current_player, _current_player, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);

   446

				MarkTileDirtyByTile(tile);

   447

			}

   448

			return _price.build_road * (rt == ROADTYPE_ROAD ? 2 : 4);

   449

		}

   450

   451

		case MP_STATION:

   452

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   453

			if (HASBIT(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);

   454

			/* Don't allow "upgrading" the roadstop when vehicles are already driving on it */

   455

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   456

			break;

   457

   458

		case MP_TUNNELBRIDGE:

   459

			if ((IsTunnel(tile) && GetTunnelTransportType(tile) != TRANSPORT_ROAD) ||

   460

					(IsBridge(tile) && GetBridgeTransportType(tile) != TRANSPORT_ROAD)) return CMD_ERROR;

   461

			if (HASBIT(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);

   462

			/* Don't allow "upgrading" the bridge/tunnel when vehicles are already driving on it */

   463

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   464

			break;

   465

   466

		default:

   467

do_clear:;

   468

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

   469

			if (CmdFailed(ret)) return ret;

   470

			cost += ret;

   471

	}

   472

   473

	if (all_bits != pieces) {

   474

		/* Check the foundation/slopes when adding road/tram bits */

   475

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

   476

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

   477

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

   478

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

   479

			return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   480

		}

   481

		cost += ret;

   482

	}

   483

   484

	if (IsTileType(tile, MP_STREET)) {

   485

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