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

   107

 * @param p2 unused

   108

 */

   109

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

   110

{

   111

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

   112

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

   113

   114

	Town *t;

   115

	/* true if the roadpiece was always removeable,

   116

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

   117

	bool edge_road;

   118

   119

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   120

   121

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

   122

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   123

   124

	Owner owner;

   125

	switch (GetTileType(tile)) {

   126

		case MP_STREET:

   127

			owner = GetRoadOwner(tile, rt);

   128

			break;

   129

   130

		case MP_STATION:

   131

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   132

			owner = GetTileOwner(tile);

   133

			break;

   134

   135

		case MP_TUNNELBRIDGE:

   136

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

   137

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

   138

			owner = GetTileOwner(tile);

   139

			break;

   140

   141

		default:

   142

			return CMD_ERROR;

   143

	}

   144

   145

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

   146

		t = GetTownByTile(tile);

   147

	} else {

   148

		t = NULL;

   149

	}

   150

   151

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

   152

	RoadTypes rts = GetRoadTypes(tile);

   153

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

   154

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

   155

   156

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

   157

   158

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   159

   160

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

   161

	 * removal allowance depends on difficulty setting */

   162

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

   163

   164

	if (!IsTileType(tile, MP_STREET)) {

   165

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

   166

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

   167

   168

		int32 cost;

   169

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   170

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

   171

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

   172

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

   173

			if (flags & DC_EXEC) {

   174

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

   175

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

   176

   177

				/* Mark tiles diry that have been repaved */

   178

				MarkTileDirtyByTile(tile);

   179

				MarkTileDirtyByTile(other_end);

   180

				if (IsBridge(tile)) {

   181

					TileIndexDiff delta = TileOffsByDiagDir(GetBridgeRampDirection(tile));

   182

   183

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

   184

				}

   185

			}

   186

		} else {

   187

			cost = _price.remove_road;

   188

			if (flags & DC_EXEC) {

   189

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

   190

				MarkTileDirtyByTile(tile);

   191

			}

   192

		}

   193

		return cost;

   194

	}

   195

   196

	switch (GetRoadTileType(tile)) {

   197

		case ROAD_TILE_NORMAL: {

   198

			RoadBits present = GetRoadBits(tile, rt);

   199

			RoadBits c = pieces;

   200

   201

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

   202

   203

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

   204

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

   205

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

   206

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

   207

			}

   208

   209

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

   210

			c &= present;

   211

			if (c == ROAD_NONE) return CMD_ERROR;

   212

   213

			if (flags & DC_EXEC) {

   214

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

   215

   216

				present ^= c;

   217

				if (present == ROAD_NONE) {

   218

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

   219

					if (rts == ROADTYPES_NONE) {

   220

						DoClearSquare(tile);

   221

					} else {

   222

						SetRoadBits(tile, ROAD_NONE, rt);

   223

						SetRoadTypes(tile, rts);

   224

					}

   225

				} else {

   226

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

   227

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

   228

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

   229

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

   230

					SetRoadBits(tile, present, rt);

   231

					MarkTileDirtyByTile(tile);

   232

				}

   233

			}

   234

			return CountRoadBits(c) * _price.remove_road;

   235

		}

   236

   237

		case ROAD_TILE_CROSSING: {

   238

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

   239

				return CMD_ERROR;

   240

			}

   241

   242

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

   243

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

   245

   246

			if (flags & DC_EXEC) {

   247

				if (rt == ROADTYPE_ROAD) {

   248

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

   249

				}

   250

   251

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

   252

				if (rts == ROADTYPES_NONE) {

   253

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

   254

				} else {

   255

					SetRoadTypes(tile, rts);

   256

				}

   257

				MarkTileDirtyByTile(tile);

   258

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

   259

			}

   260

			return _price.remove_road * 2;

   261

		}

   262

   263

		default:

   264

		case ROAD_TILE_DEPOT:

   265

			return CMD_ERROR;

   266

	}

   267

}

   268

   269

   270

static const RoadBits _valid_tileh_slopes_road[][15] = {

   271

	/* set of normal ones */

   272

	{

   273

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   274

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

   275

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   276

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

   277

		ROAD_X,   ROAD_NONE, ROAD_NONE

   278

	},

   279

	/* allowed road for an evenly raised platform */

   280

	{

   281

		ROAD_NONE,

   282

		ROAD_SW | ROAD_NW,

   283

		ROAD_SW | ROAD_SE,

   284

		ROAD_Y  | ROAD_SW,

   285

   286

		ROAD_SE | ROAD_NE, // 4

   287

		ROAD_ALL,

   288

		ROAD_X  | ROAD_SE,

   289

		ROAD_ALL,

   290

   291

		ROAD_NW | ROAD_NE, // 8

   292

		ROAD_X  | ROAD_NW,

   293

		ROAD_ALL,

   294

		ROAD_ALL,

   295

   296

		ROAD_Y  | ROAD_NE, // 12

   297

		ROAD_ALL,

   298

		ROAD_ALL

   299

	},

   300

};

   301

   302

   303

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

   304

{

   305

	RoadBits road_bits;

   306

   307

	if (IsSteepSlope(tileh)) {

   308

		if (existing == 0) {

   309

			/* force full pieces. */

   310

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

   311

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

   312

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

   313

		}

   314

		return CMD_ERROR;

   315

	}

   316

	road_bits = *pieces | existing;

   317

   318

	/* no special foundation */

   319

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

   320

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

   321

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

   322

		return 0; // no extra cost

   323

	}

   324

   325

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

   326

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

   327

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

   328

	}

   329

   330

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

   331

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

   332

		/* force full pieces. */

   333

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

   334

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

   335

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

   336

	}

   337

	return CMD_ERROR;

   338

}

   339

   340

/** Build a piece of road.

   341

 * @param tile tile where to build road

   342

 * @param flags operation to perform

   343

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

   344

 *           bit 4..5 road type

   345

 *           bit 6..7 disallowed directions to toggle

   346

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

   347

 */

   348

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

   349

{

   350

	int32 cost = 0;

   351

	int32 ret;

   352

	RoadBits existing = ROAD_NONE;

   353

	RoadBits all_bits = ROAD_NONE;

   354

	Slope tileh;

   355

   356

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   357

   358

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

   359

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

   360

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

   361

   362

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

   363

   364

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

   365

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   366

   367

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

   368

   369

	tileh = GetTileSlope(tile, NULL);

   370

   371

	switch (GetTileType(tile)) {

   372

		case MP_STREET:

   373

			switch (GetRoadTileType(tile)) {

   374

				case ROAD_TILE_NORMAL: {

   375

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

   376

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   377

   378

					all_bits = GetAllRoadBits(tile);

   379

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

   380

   381

					existing = GetRoadBits(tile, rt);

   382

					RoadBits merged = existing | pieces;

   383

					bool crossing = (merged != ROAD_X && merged != ROAD_Y);

   384

					if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {

   385

						/* Junctions cannot be one-way */

   386

						return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   387

					}

   388

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

   389

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

   390

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

   391

							if (crossing) return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   392

   393

							/* Ignore half built tiles */

   394

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

   395

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

   396

								MarkTileDirtyByTile(tile);

   397

							}

   398

							return 0;

   399

						}

   400

						return_cmd_error(STR_1007_ALREADY_BUILT);

   401

					}

   402

				} break;

   403

   404

				case ROAD_TILE_CROSSING:

   405

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

   406

					all_bits = GetCrossingRoadBits(tile);

   407

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

   408

					break;

   409

   410

				default:

   411

				case ROAD_TILE_DEPOT:

   412

					goto do_clear;

   413

			}

   414

			break;

   415

   416

		case MP_RAILWAY: {

   417

			Axis roaddir;

   418

   419

			if (IsSteepSlope(tileh)) {

   420

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   421

			}

   422

   423

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

   424

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

   425

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

   426

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   427

			}

   428

#undef M

   429

   430

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

   431

			switch (GetTrackBits(tile)) {

   432

				case TRACK_BIT_X:

   433

					if (pieces & ROAD_X) goto do_clear;

   434

					roaddir = AXIS_Y;

   435

					break;

   436

   437

				case TRACK_BIT_Y:

   438

					if (pieces & ROAD_Y) goto do_clear;

   439

					roaddir = AXIS_X;

   440

					break;

   441

   442

				default: goto do_clear;

   443

			}

   444

   445

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   446

   447

			if (flags & DC_EXEC) {

   448

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

   449

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

   450

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

   451

				MarkTileDirtyByTile(tile);

   452

			}

   453

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

   454

		}

   455

   456

		case MP_STATION:

   457

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   458

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

   459

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

   460

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   461

			break;

   462

   463

		case MP_TUNNELBRIDGE:

   464

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

   465

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

   466

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

   467

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

   468

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   469

			break;

   470

   471

		default:

   472

do_clear:;

   473

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

   474

			if (CmdFailed(ret)) return ret;

   475

			cost += ret;

   476

	}

   477

   478

	if (all_bits != pieces) {

   479

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

   480

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

   481

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

   482

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

   483

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

   484

			return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   485

		}