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

#include "misc/autoptr.hpp"

    35

    36

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

    37

{

    38

	RoadBits present;

    39

	RoadBits n;

    40

	*edge_road = true;

    41

    42

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

    43

    44

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

    45

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

    46

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

    47

	if (_current_player == OWNER_WATER ||

    48

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

    49

    50

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

    51

	 * by a town */

    52

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

    53

    54

	if (_cheats.magic_bulldozer.value) return true;

    55

    56

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

    57

	n = ROAD_NONE;

    58

	present = GetAnyRoadBits(tile, rt);

    59

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

    60

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

    61

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

    62

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

    63

    64

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

    65

	 * then allow it */

    66

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

    67

		Town *t;

    68

		*edge_road = false;

    69

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

    70

		if (_patches.extra_dynamite) return true;

    71

    72

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

    73

    74

		SetDParam(0, t->index);

    75

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    76

		return false;

    77

	}

    78

    79

	return true;

    80

}

    81

    82

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

    83

{

    84

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

    85

}

    86

    87

/** Delete a piece of road.

    88

 * @param tile tile where to remove road from

    89

 * @param flags operation to perform

    90

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

    91

 *           bit 4..5 road type

    92

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

    93

 *                    yet when removing the road bits when not actually doing

    94

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

    95

 *                    be removed from a level crossing without physically

    96

 *                    removing the tram bits before the test.

    97

 * @param p2 unused

    98

 */

    99

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

   100

{

   101

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

   102

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

   103

   104

	/* true if the roadpiece was always removeable,

   105

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

   106

	bool edge_road;

   107

   108

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   109

   110

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

   111

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   112

   113

	Town *t = NULL;

   114

	switch (GetTileType(tile)) {

   115

		case MP_ROAD:

   116

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

   117

			break;

   118

   119

		case MP_STATION:

   120

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   121

			break;

   122

   123

		case MP_TUNNELBRIDGE:

   124

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

   125

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

   126

			break;

   127

   128

		default:

   129

			return CMD_ERROR;

   130

	}

   131

   132

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

   133

	RoadTypes rts = GetRoadTypes(tile);

   134

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

   135

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

   136

   137

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

   138

   139

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   140

   141

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

   142

	 * removal allowance depends on difficulty setting */

   143

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

   144

   145

	if (!IsTileType(tile, MP_ROAD)) {

   146

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

   147

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

   148

   149

		CommandCost cost;

   150

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   151

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

   152

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

   153

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

   154

			if (flags & DC_EXEC) {

   155

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

   156

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

   157

   158

				/* Mark tiles diry that have been repaved */

   159

				MarkTileDirtyByTile(tile);

   160

				MarkTileDirtyByTile(other_end);

   161

				if (IsBridge(tile)) {

   162

					TileIndexDiff delta = TileOffsByDiagDir(GetBridgeRampDirection(tile));

   163

   164

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

   165

				}

   166

			}

   167

		} else {

   168

			cost.AddCost(_price.remove_road);

   169

			if (flags & DC_EXEC) {

   170

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

   171

				MarkTileDirtyByTile(tile);

   172

			}

   173

		}

   174

		return CommandCost(cost);

   175

	}

   176

   177

	switch (GetRoadTileType(tile)) {

   178

		case ROAD_TILE_NORMAL: {

   179

			RoadBits present = GetRoadBits(tile, rt);

   180

			RoadBits c = pieces;

   181

   182

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

   183

   184

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

   185

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

   186

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

   187

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

   188

			}

   189

   190

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

   191

			c &= present;

   192

			if (c == ROAD_NONE) return CMD_ERROR;

   193

   194

			if (flags & DC_EXEC) {

   195

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

   196

   197

				present ^= c;

   198

				if (present == ROAD_NONE) {

   199

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

   200

					if (rts == ROADTYPES_NONE) {

   201

						/* Includes MarkTileDirtyByTile() */

   202

						DoClearSquare(tile);

   203

					} else {

   204

						SetRoadBits(tile, ROAD_NONE, rt);

   205

						SetRoadTypes(tile, rts);

   206

						MarkTileDirtyByTile(tile);

   207

					}

   208

				} else {

   209

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

   210

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

   211

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

   212

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

   213

					SetRoadBits(tile, present, rt);

   214

					MarkTileDirtyByTile(tile);

   215

				}

   216

			}

   217

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

   218

		}

   219

   220

		case ROAD_TILE_CROSSING: {

   221

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

   222

				return CMD_ERROR;

   223

			}

   224

   225

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

   226

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

   227

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

   228

   229

			if (flags & DC_EXEC) {

   230

				if (rt == ROADTYPE_ROAD) {

   231

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

   232

				}

   233

   234

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

   235

				if (rts == ROADTYPES_NONE) {

   236

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

   237

				} else {

   238

					SetRoadTypes(tile, rts);

   239

				}

   240

				MarkTileDirtyByTile(tile);

   241

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

   242

			}

   243

			return CommandCost(_price.remove_road * 2);

   244

		}

   245

   246

		default:

   247

		case ROAD_TILE_DEPOT:

   248

			return CMD_ERROR;

   249

	}

   250

}

   251

   252

   253

static const RoadBits _valid_tileh_slopes_road[][15] = {

   254

	/* set of normal ones */

   255

	{

   256

		ROAD_ALL, ROAD_NONE, ROAD_NONE,

   257

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

   258

		ROAD_Y,   ROAD_NONE, ROAD_NONE,

   259

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

   260

		ROAD_X,   ROAD_NONE, ROAD_NONE

   261

	},

   262

	/* allowed road for an evenly raised platform */

   263

	{

   264

		ROAD_NONE,

   265

		ROAD_SW | ROAD_NW,

   266

		ROAD_SW | ROAD_SE,

   267

		ROAD_Y  | ROAD_SW,

   268

   269

		ROAD_SE | ROAD_NE, // 4

   270

		ROAD_ALL,

   271

		ROAD_X  | ROAD_SE,

   272

		ROAD_ALL,

   273

   274

		ROAD_NW | ROAD_NE, // 8

   275

		ROAD_X  | ROAD_NW,

   276

		ROAD_ALL,

   277

		ROAD_ALL,

   278

   279

		ROAD_Y  | ROAD_NE, // 12

   280

		ROAD_ALL,

   281

		ROAD_ALL

   282

	},

   283

};

   284

   285

   286

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

   287

{

   288

	RoadBits road_bits;

   289

   290

	if (IsSteepSlope(tileh)) {

   291

		/* force full pieces. */

   292

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

   293

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

   294

   295

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

   296

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

   297

		}

   298

		return CMD_ERROR;

   299

	}

   300

	road_bits = *pieces | existing;

   301

   302

	/* no special foundation */

   303

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

   304

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

   305

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

   306

		return CommandCost(); // no extra cost

   307

	}

   308

   309

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

   310

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

   311

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

   312

	}

   313

   314

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

   315

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

   316

   317

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

   318

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

   319

		/* force full pieces. */

   320

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

   321

	}

   322

	return CMD_ERROR;

   323

}

   324

   325

/** Build a piece of road.

   326

 * @param tile tile where to build road

   327

 * @param flags operation to perform

   328

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

   329

 *           bit 4..5 road type

   330

 *           bit 6..7 disallowed directions to toggle

   331

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

   332

 */

   333

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

   334

{

   335

	CommandCost cost;

   336

	CommandCost ret;

   337

	RoadBits existing = ROAD_NONE;

   338

	RoadBits all_bits = ROAD_NONE;

   339

	Slope tileh;

   340

   341

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   342

   343

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

   344

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

   345

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

   346

   347

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

   348

   349

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

   350

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   351

   352

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

   353

   354

	tileh = GetTileSlope(tile, NULL);

   355

   356

	switch (GetTileType(tile)) {

   357

		case MP_ROAD:

   358

			switch (GetRoadTileType(tile)) {

   359

				case ROAD_TILE_NORMAL: {

   360

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

   361

					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   362

   363

					all_bits = GetAllRoadBits(tile);

   364

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

   365

   366

					existing = GetRoadBits(tile, rt);

   367

					RoadBits merged = existing | pieces;

   368

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

   369

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

   370

						/* Junctions cannot be one-way */

   371

						return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   372

					}

   373

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

   374

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

   375

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

   376

							if (crossing) return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);

   377

   378

							/* Ignore half built tiles */

   379

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

   380

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

   381

								MarkTileDirtyByTile(tile);

   382

							}

   383

							return CommandCost();

   384

						}

   385

						return_cmd_error(STR_1007_ALREADY_BUILT);

   386

					}

   387

				} break;

   388

   389

				case ROAD_TILE_CROSSING:

   390

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

   391

					all_bits = GetCrossingRoadBits(tile);

   392

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

   393

					break;

   394

   395

				default:

   396

				case ROAD_TILE_DEPOT:

   397

					goto do_clear;

   398

			}

   399

			break;

   400

   401

		case MP_RAILWAY: {

   402

			Axis roaddir;

   403

   404

			if (IsSteepSlope(tileh)) {

   405

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   406

			}

   407

   408

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

   409

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

   410

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

   411

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   412

			}

   413

#undef M

   414

   415

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

   416

			switch (GetTrackBits(tile)) {

   417

				case TRACK_BIT_X:

   418

					if (pieces & ROAD_X) goto do_clear;

   419

					roaddir = AXIS_Y;

   420

					break;

   421

   422

				case TRACK_BIT_Y:

   423

					if (pieces & ROAD_Y) goto do_clear;

   424

					roaddir = AXIS_X;

   425

					break;

   426

   427

				default: goto do_clear;

   428

			}

   429

   430

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   431

   432

			if (flags & DC_EXEC) {

   433

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

   434

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

   435

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

   436

				MarkTileDirtyByTile(tile);

   437

			}

   438

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

   439

		}

   440

   441

		case MP_STATION:

   442

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   443

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

   444

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

   445

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   446

			break;

   447

   448

		case MP_TUNNELBRIDGE:

   449

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

   450

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

   451

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

   452

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

   453

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   454

			break;

   455

   456

		default:

   457

do_clear:;

   458

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

   459

			if (CmdFailed(ret)) return ret;

   460

			cost.AddCost(ret);

   461

	}

   462

   463

	if (all_bits != pieces) {

   464

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

   465

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

   466

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

   467

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

   468

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

   469

			return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   470

		}

   471

		cost.AddCost(ret);

   472

	}

   473

   474

	if (IsTileType(tile, MP_ROAD)) {

   475

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

   476

		pieces &= ComplementRoadBits(existing);

   477

	}

   478

   479

	cost.AddCost(COUNTBITS(pieces) * _price.build_road);

   480

	if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   481

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

   482

		cost.MultiplyCost(DistanceManhattan(IsTunnel(tile) ? GetOtherTunnelEnd(tile) : GetOtherBridgeEnd(tile), tile));

   483

	}