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 "strings.h"

    16

#include "functions.h"

    17

#include "window.h"

    18

#include "map.h"

    19

#include "landscape.h"

    20

#include "tile.h"

    21

#include "town_map.h"

    22

#include "vehicle.h"

    23

#include "viewport.h"

    24

#include "command.h"

    25

#include "player.h"

    26

#include "town.h"

    27

#include "gfx.h"

    28

#include "sound.h"

    29

#include "yapf/yapf.h"

    30

#include "depot.h"

    31

#include "newgrf.h"

    32

#include "station_map.h"

    33

#include "tunnel_map.h"

    34

    35

    36

static uint CountRoadBits(RoadBits r)

    37

{

    38

	uint count = 0;

    39

    40

	if (r & ROAD_NW) ++count;

    41

	if (r & ROAD_SW) ++count;

    42

	if (r & ROAD_SE) ++count;

    43

	if (r & ROAD_NE) ++count;

    44

	return count;

    45

}

    46

    47

    48

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

    49

{

    50

	RoadBits present;

    51

	RoadBits n;

    52

	*edge_road = true;

    53

    54

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

    55

    56

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

    57

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

    58

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

    59

	if (_current_player == OWNER_WATER ||

    60

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

    61

    62

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

    63

	 * by a town */

    64

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

    65

    66

	if (_cheats.magic_bulldozer.value) return true;

    67

    68

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

    69

	n = ROAD_NONE;

    70

	present = GetAnyRoadBits(tile, rt);

    71

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

    72

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

    73

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

    74

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

    75

    76

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

    77

	 * then allow it */

    78

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

    79

		Town *t;

    80

		*edge_road = false;

    81

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

    82

		if (_patches.extra_dynamite) return true;

    83

    84

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

    85

    86

		SetDParam(0, t->index);

    87

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    88

		return false;

    89

	}

    90

    91

	return true;

    92

}

    93

    94

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

    95

{

    96

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

    97

}

    98

    99

/** Delete a piece of road.

   100

 * @param tile tile where to remove road from

   101

 * @param flags operation to perform

   102

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

   103

 *           bit 4..5 road type

   104

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

   105

 *                    yet when removing the road bits when not actually doing

   106

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

   107

 *                    be removed from a level crossing without physically

   108

 *                    removing the tram bits before the test.

   109

 * @param p2 unused

   110

 */

   111

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

   112

{

   113

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

   114

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

   115

   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

	Town *t = NULL;

   126

	switch (GetTileType(tile)) {

   127

		case MP_STREET:

   128

			if (_game_mode != GM_EDITOR && GetRoadOwner(tile, rt) == OWNER_TOWN) t = GetTownByTile(tile);

   129

			break;

   130

   131

		case MP_STATION:

   132

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   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

			break;

   139

   140

		default:

   141

			return CMD_ERROR;

   142

	}

   143

   144

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

   145

	RoadTypes rts = GetRoadTypes(tile);

   146

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

   147

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

   148

   149

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

   150

   151

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   152

   153

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

   154

	 * removal allowance depends on difficulty setting */

   155

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

   156

   157

	if (!IsTileType(tile, MP_STREET)) {

   158

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

   159

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

   160

   161

		CommandCost cost;

   162

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   163

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

   164

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

   165

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

   166

			if (flags & DC_EXEC) {

   167

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

   168

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

   169

   170

				/* Mark tiles diry that have been repaved */

   171

				MarkTileDirtyByTile(tile);

   172

				MarkTileDirtyByTile(other_end);

   173

				if (IsBridge(tile)) {

   174

					TileIndexDiff delta = TileOffsByDiagDir(GetBridgeRampDirection(tile));

   175

   176

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

   177

				}

   178

			}

   179

		} else {

   180

			cost.AddCost(_price.remove_road);

   181

			if (flags & DC_EXEC) {

   182

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

   183

				MarkTileDirtyByTile(tile);

   184

			}

   185

		}

   186

		return CommandCost(cost);

   187

	}

   188

   189

	switch (GetRoadTileType(tile)) {

   190

		case ROAD_TILE_NORMAL: {

   191

			RoadBits present = GetRoadBits(tile, rt);

   192

			RoadBits c = pieces;

   193

   194

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

   195

   196

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

   197

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

   198

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

   199

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

   200

			}

   201

   202

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

   203

			c &= present;

   204

			if (c == ROAD_NONE) return CMD_ERROR;

   205

   206

			if (flags & DC_EXEC) {

   207

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

   208

   209

				present ^= c;

   210

				if (present == ROAD_NONE) {

   211

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

   212

					if (rts == ROADTYPES_NONE) {

   213

						DoClearSquare(tile);

   214

					} else {

   215

						SetRoadBits(tile, ROAD_NONE, rt);

   216

						SetRoadTypes(tile, rts);

   217

					}

   218

				} else {

   219

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

   220

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

   221

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

   222

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

   223

					SetRoadBits(tile, present, rt);

   224

					MarkTileDirtyByTile(tile);

   225

				}

   226

			}

   227

			return CommandCost(CountRoadBits(c) * _price.remove_road);

   228

		}

   229

   230

		case ROAD_TILE_CROSSING: {

   231

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

   232

				return CMD_ERROR;

   233

			}

   234

   235

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

   236

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

   237

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

   238

   239

			if (flags & DC_EXEC) {

   240

				if (rt == ROADTYPE_ROAD) {

   241

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

   242

				}

   243

   244

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

   245

				if (rts == ROADTYPES_NONE) {

   246

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

   247

				} else {

   248

					SetRoadTypes(tile, rts);

   249

				}

   250

				MarkTileDirtyByTile(tile);

   251

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

   252

			}

   253

			return CommandCost(_price.remove_road * 2);

   254

		}

   255

   256

		default:

   257

		case ROAD_TILE_DEPOT:

   258

			return CMD_ERROR;

   259

	}

   260

}

   261

   262

   263

static const RoadBits _valid_tileh_slopes_road[][15] = {

   264

	/* set of normal ones */

   265

	{

   266

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   267

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

   268

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   269

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

   270

		ROAD_X,   ROAD_NONE, ROAD_NONE

   271

	},

   272

	/* allowed road for an evenly raised platform */

   273

	{

   274

		ROAD_NONE,

   275

		ROAD_SW | ROAD_NW,

   276

		ROAD_SW | ROAD_SE,

   277

		ROAD_Y  | ROAD_SW,

   278

   279

		ROAD_SE | ROAD_NE, // 4

   280

		ROAD_ALL,

   281

		ROAD_X  | ROAD_SE,

   282

		ROAD_ALL,

   283

   284

		ROAD_NW | ROAD_NE, // 8

   285

		ROAD_X  | ROAD_NW,

   286

		ROAD_ALL,

   287

		ROAD_ALL,

   288

   289

		ROAD_Y  | ROAD_NE, // 12

   290

		ROAD_ALL,

   291

		ROAD_ALL

   292

	},

   293

};

   294

   295

   296

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

   297

{

   298

	RoadBits road_bits;

   299

   300

	if (IsSteepSlope(tileh)) {

   301

		/* force full pieces. */

   302

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

   303

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

   304

   305

		if (existing == 0 || existing == *pieces) {

   306

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

   307

		}

   308

		return CMD_ERROR;

   309

	}

   310

	road_bits = *pieces | existing;

   311

   312

	/* no special foundation */

   313

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

   314

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

   315

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

   316

		return CommandCost(); // no extra cost

   317

	}

   318

   319

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

   320

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

   321

		return CommandCost(existing != 0 ? 0 : _price.terraform);

   322

	}

   323

   324

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

   325

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

   326

   327

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

   328

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

   329

		/* force full pieces. */

   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

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

   344

{

   345

	CommandCost cost;

   346

	CommandCost 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;

   378

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

   379

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

   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 CommandCost();

   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 CommandCost(_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.AddCost(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.GetCost() != 0 && (!_patches.build_on_slopes || _is_old_ai_player))) {

   479

			return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   480

		}

   481

		cost.AddCost(ret);

   482

	}

   483

   484