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 "window.h"

    17

#include "map.h"

    18

#include "landscape.h"

    19

#include "tile.h"

    20

#include "town_map.h"

    21

#include "vehicle.h"

    22

#include "viewport.h"

    23

#include "command.h"

    24

#include "player.h"

    25

#include "town.h"

    26

#include "gfx.h"

    27

#include "sound.h"

    28

#include "yapf/yapf.h"

    29

#include "depot.h"

    30

#include "newgrf.h"

    31

#include "station_map.h"

    32

#include "tunnel_map.h"

    33

    34

    35

static uint CountRoadBits(RoadBits r)

    36

{

    37

	uint count = 0;

    38

    39

	if (r & ROAD_NW) ++count;

    40

	if (r & ROAD_SW) ++count;

    41

	if (r & ROAD_SE) ++count;

    42

	if (r & ROAD_NE) ++count;

    43

	return count;

    44

}

    45

    46

    47

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

    48

{

    49

	RoadBits present;

    50

	RoadBits n;

    51

	*edge_road = true;

    52

    53

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

    54

    55

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

    56

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

    57

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

    58

	if (_current_player == OWNER_WATER ||

    59

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

    60

    61

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

    62

	 * by a town */

    63

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

    64

    65

	if (_cheats.magic_bulldozer.value) return true;

    66

    67

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

    68

	n = ROAD_NONE;

    69

	present = GetAnyRoadBits(tile, rt);

    70

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

    71

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

    72

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

    73

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

    74

    75

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

    76

	 * then allow it */

    77

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

    78

		Town *t;

    79

		*edge_road = false;

    80

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

    81

		if (_patches.extra_dynamite) return true;

    82

    83

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

    84

    85

		SetDParam(0, t->index);

    86

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    87

		return false;

    88

	}

    89

    90

	return true;

    91

}

    92

    93

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

    94

{

    95

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

    96

}

    97

    98

/** Delete a piece of road.

    99

 * @param tile tile where to remove road from

   100

 * @param flags operation to perform

   101

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

   102

 *           bit 4..5 road type

   103

 *           bit    6 ignore the fact that the tram track has not been removed

   104

 *                    yet when removing the road bits when not actually doing

   105

 *                    it. Makes it possible to test whether the road bits can

   106

 *                    be removed from a level crossing without physically

   107

 *                    removing the tram bits before the test.

   108

 * @param p2 unused

   109

 */

   110

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

   111

{

   112

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

   113

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

   114

   115

	Town *t;

   116

	/* true if the roadpiece was always removeable,

   117

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

   118

	bool edge_road;

   119

   120

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   121

   122

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

   123

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   124

   125

	Owner owner;

   126

	switch (GetTileType(tile)) {

   127

		case MP_STREET:

   128

			owner = GetRoadOwner(tile, rt);

   129

			break;

   130

   131

		case MP_STATION:

   132

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   133

			owner = GetTileOwner(tile);

   134

			break;

   135

   136

		case MP_TUNNELBRIDGE:

   137

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

   138

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

   139

			owner = GetTileOwner(tile);

   140

			break;

   141

   142

		default:

   143

			return CMD_ERROR;

   144

	}

   145

   146

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

   147

		t = GetTownByTile(tile);

   148

	} else {

   149

		t = NULL;

   150

	}

   151

   152

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

   153

	RoadTypes rts = GetRoadTypes(tile);

   154

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

   155

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

   156

   157

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

   158

   159

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   160

   161

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

   162

	 * removal allowance depends on difficulty setting */

   163

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

   164

   165

	if (!IsTileType(tile, MP_STREET)) {

   166

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

   167

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

   168

   169

		CommandCost cost;

   170

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   171

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

   172

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

   174

			if (flags & DC_EXEC) {

   175

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

   176

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

   177

   178

				/* Mark tiles diry that have been repaved */

   179

				MarkTileDirtyByTile(tile);

   180

				MarkTileDirtyByTile(other_end);

   181

				if (IsBridge(tile)) {

   182

					TileIndexDiff delta = TileOffsByDiagDir(GetBridgeRampDirection(tile));

   183

   184

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

   185

				}

   186

			}

   187

		} else {

   189

			if (flags & DC_EXEC) {

   190

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

   191

				MarkTileDirtyByTile(tile);

   192

			}

   193

		}

   195

	}

   196

   197

	switch (GetRoadTileType(tile)) {

   198

		case ROAD_TILE_NORMAL: {

   199

			RoadBits present = GetRoadBits(tile, rt);

   200

			RoadBits c = pieces;

   201

   202

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

   203

   204

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

   205

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

   206

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

   207

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

   208

			}

   209

   210

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

   211

			c &= present;

   212

			if (c == ROAD_NONE) return CMD_ERROR;

   213

   214

			if (flags & DC_EXEC) {

   215

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

   216

   217

				present ^= c;

   218

				if (present == ROAD_NONE) {

   219

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

   220

					if (rts == ROADTYPES_NONE) {

   221

						DoClearSquare(tile);

   222

					} else {

   223

						SetRoadBits(tile, ROAD_NONE, rt);

   224

						SetRoadTypes(tile, rts);

   225

					}

   226

				} else {

   227

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

   228

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

   229

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

   230

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

   231

					SetRoadBits(tile, present, rt);

   232

					MarkTileDirtyByTile(tile);

   233

				}

   234

			}

   236

		}

   237

   238

		case ROAD_TILE_CROSSING: {

   239

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

   240

				return CMD_ERROR;

   241

			}

   242

   243

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

   244

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

   245

			if (rt == ROADTYPE_ROAD && HASBIT(GetRoadTypes(tile), ROADTYPE_TRAM) && ((flags & DC_EXEC) || !HASBIT(p1, 6))) return CMD_ERROR;

   246

   247

			if (flags & DC_EXEC) {

   248

				if (rt == ROADTYPE_ROAD) {

   249

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

   250

				}

   251

   252

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

   253

				if (rts == ROADTYPES_NONE) {

   254

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

   255

				} else {

   256

					SetRoadTypes(tile, rts);

   257

				}

   258

				MarkTileDirtyByTile(tile);

   259

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

   260

			}

   262

		}

   263

   264

		default:

   265

		case ROAD_TILE_DEPOT:

   266

			return CMD_ERROR;

   267

	}

   268

}

   269

   270

   271

static const RoadBits _valid_tileh_slopes_road[][15] = {

   272

	/* set of normal ones */

   273

	{

   274

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   275

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

   276

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   277

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

   278

		ROAD_X,   ROAD_NONE, ROAD_NONE

   279

	},

   280

	/* allowed road for an evenly raised platform */

   281

	{

   282

		ROAD_NONE,

   283

		ROAD_SW | ROAD_NW,

   284

		ROAD_SW | ROAD_SE,

   285

		ROAD_Y  | ROAD_SW,

   286

   287

		ROAD_SE | ROAD_NE, // 4

   288

		ROAD_ALL,

   289

		ROAD_X  | ROAD_SE,

   290

		ROAD_ALL,

   291

   292

		ROAD_NW | ROAD_NE, // 8

   293

		ROAD_X  | ROAD_NW,

   294

		ROAD_ALL,

   295

		ROAD_ALL,

   296

   297

		ROAD_Y  | ROAD_NE, // 12

   298

		ROAD_ALL,

   299

		ROAD_ALL

   300

	},

   301

};

   302

   303

   304

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

   305

{

   306

	RoadBits road_bits;

   307

   308

	if (IsSteepSlope(tileh)) {

   309

		if (existing == 0) {

   310

			/* force full pieces. */

   311

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

   312

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

   313

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

   314

		}

   315

		return CMD_ERROR;

   316

	}

   317

	road_bits = *pieces | existing;

   318

   319

	/* no special foundation */

   320

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

   321

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

   322

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

   324

	}

   325

   326

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

   327

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

   329

	}

   330

   331

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

   332

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

   333

		/* force full pieces. */

   334

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

   335

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

   336

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

   337

	}

   338

	return CMD_ERROR;

   339

}

   340

   341

/** Build a piece of road.

   342

 * @param tile tile where to build road

   343

 * @param flags operation to perform

   344

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

   345

 *           bit 4..5 road type

   346

 *           bit 6..7 disallowed directions to toggle

   347

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

   348

 */

   349

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

   350

{

   352

	CommandCost ret;

   353

	RoadBits existing = ROAD_NONE;

   354

	RoadBits all_bits = ROAD_NONE;

   355

	Slope tileh;

   356

   357

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   358

   359

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

   360

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

   361

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

   362

   363

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

   364

   365

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

   366

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   367

   368

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

   369

   370

	tileh = GetTileSlope(tile, NULL);

   371

   372

	switch (GetTileType(tile)) {

   373

		case MP_STREET:

   374

			switch (GetRoadTileType(tile)) {

   375

				case ROAD_TILE_NORMAL: {

   376

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

   377

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   378

   379

					all_bits = GetAllRoadBits(tile);

   380

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

   381

   382

					existing = GetRoadBits(tile, rt);

   383

					RoadBits merged = existing | pieces;

   384

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

   385

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

   386

						/* Junctions cannot be one-way */

   387

						return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   388

					}

   389

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

   390

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

   391

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

   392

							if (crossing) return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   393

   394

							/* Ignore half built tiles */

   395

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

   396

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

   397

								MarkTileDirtyByTile(tile);

   398

							}

   400

						}

   401

						return_cmd_error(STR_1007_ALREADY_BUILT);

   402

					}

   403

				} break;

   404

   405

				case ROAD_TILE_CROSSING:

   406

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

   407

					all_bits = GetCrossingRoadBits(tile);

   408

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

   409

					break;

   410

   411

				default:

   412

				case ROAD_TILE_DEPOT:

   413

					goto do_clear;

   414

			}

   415

			break;

   416

   417

		case MP_RAILWAY: {

   418

			Axis roaddir;

   419

   420

			if (IsSteepSlope(tileh)) {

   421

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   422

			}

   423

   424

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

   425

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

   426

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

   427

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   428

			}

   429

#undef M

   430

   431

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

   432

			switch (GetTrackBits(tile)) {

   433

				case TRACK_BIT_X:

   434

					if (pieces & ROAD_X) goto do_clear;

   435

					roaddir = AXIS_Y;

   436

					break;

   437

   438

				case TRACK_BIT_Y:

   439

					if (pieces & ROAD_Y) goto do_clear;

   440

					roaddir = AXIS_X;

   441

					break;

   442

   443

				default: goto do_clear;

   444

			}

   445

   446

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   447

   448

			if (flags & DC_EXEC) {

   449

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

   450

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

   451

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

   452

				MarkTileDirtyByTile(tile);

   453

			}

   455

		}

   456

   457

		case MP_STATION:

   458

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   459

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

   460

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

   461

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   462

			break;

   463

   464

		case MP_TUNNELBRIDGE:

   465

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

   466

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

   467

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

   468

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

   469

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   470

			break;

   471

   472

		default:

   473

do_clear:;

   474

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

   475

			if (CmdFailed(ret)) return ret;

   477

	}

   478

   479

	if (all_bits != pieces) {

   480

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

   481

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

   482

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

   483

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