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/* $Id$ */

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     3

/** @file road_cmd.cpp Commands related to road tiles. */

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#include "stdafx.h"

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#include "openttd.h"

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#include "bridge_map.h"

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#include "bridge.h"

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#include "cmd_helper.h"

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#include "rail_map.h"

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#include "road_map.h"

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#include "road_internal.h"

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#include "sprite.h"

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#include "tile_cmd.h"

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#include "landscape.h"

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#include "town_map.h"

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#include "viewport_func.h"

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#include "command_func.h"

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#include "town.h"

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#include "yapf/yapf.h"

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#include "depot_base.h"

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#include "depot_func.h"

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#include "newgrf.h"

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#include "station_map.h"

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#include "tunnel_map.h"

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#include "variables.h"

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#include "autoslope.h"

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#include "transparency.h"

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#include "tunnelbridge_map.h"

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#include "window_func.h"

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#include "strings_func.h"

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#include "vehicle_func.h"

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#include "vehicle_base.h"

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#include "sound_func.h"

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#include "road_func.h"

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#include "tunnelbridge.h"

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#include "cheat_func.h"

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#include "functions.h"

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#include "effectvehicle_func.h"

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#include "elrail_func.h"

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#include "oldpool_func.h"

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    43

#include "table/sprites.h"

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#include "table/strings.h"

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    46

    47

bool RoadVehiclesAreBuilt()

    48

{

    49

	const Vehicle* v;

    50

    51

	FOR_ALL_VEHICLES(v) {

    52

		if (v->type == VEH_ROAD) return true;

    53

	}

    54

	return false;

    55

}

    56

    57

/**

    58

 * Change the side of the road vehicles drive on (server only).

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 * @param tile unused

    60

 * @param flags operation to perform

    61

 * @param p1 the side of the road; 0 = left side and 1 = right side

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 * @param p2 unused

    63

 */

    64

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

    65

{

    66

	/* Check boundaries and you can only change this if NO vehicles have been built yet,

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	 * except in the intro-menu where of course it's always possible to do so. */

    68

	if (p1 > 1 || (_game_mode != GM_MENU && RoadVehiclesAreBuilt())) return CMD_ERROR;

    69

    70

	if (flags & DC_EXEC) {

    71

		if (_game_mode == GM_MENU) {

    72

			_settings_newgame.vehicle.road_side = p1;

    73

		} else {

    74

			_settings_game.vehicle.road_side = p1;

    75

		}

    76

		InvalidateWindow(WC_GAME_OPTIONS, 0);

    77

	}

    78

	return CommandCost();

    79

}

    80

    81

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

    82

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

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static const uint32 VALID_LEVEL_CROSSING_SLOPES = (M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT));

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#undef M

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    86

/* Invalid RoadBits on slopes  */

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static const RoadBits _invalid_tileh_slopes_road[2][15] = {

    88

	/* The inverse of the mixable RoadBits on a leveled slope */

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	{

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		ROAD_NONE,         // SLOPE_FLAT

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		ROAD_NE | ROAD_SE, // SLOPE_W

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		ROAD_NE | ROAD_NW, // SLOPE_S

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    94

		ROAD_NE,           // SLOPE_SW

    95

		ROAD_NW | ROAD_SW, // SLOPE_E

    96

		ROAD_NONE,         // SLOPE_EW

    97

    98

		ROAD_NW,           // SLOPE_SE

    99

		ROAD_NONE,         // SLOPE_WSE

   100

		ROAD_SE | ROAD_SW, // SLOPE_N

   101

   102

		ROAD_SE,           // SLOPE_NW

   103

		ROAD_NONE,         // SLOPE_NS

   104

		ROAD_NONE,         // SLOPE_ENW

   105

   106

		ROAD_SW,           // SLOPE_NE

   107

		ROAD_NONE,         // SLOPE_SEN

   108

		ROAD_NONE          // SLOPE_NWS

   109

	},

   110

	/* The inverse of the allowed straight roads on a slope

   111

	 * (with and without a foundation). */

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	{

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		ROAD_NONE, // SLOPE_FLAT

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		ROAD_NONE, // SLOPE_W    Foundation

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		ROAD_NONE, // SLOPE_S    Foundation

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   117

		ROAD_Y,    // SLOPE_SW

   118

		ROAD_NONE, // SLOPE_E    Foundation

   119

		ROAD_ALL,  // SLOPE_EW

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   121

		ROAD_X,    // SLOPE_SE

   122

		ROAD_ALL,  // SLOPE_WSE

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		ROAD_NONE, // SLOPE_N    Foundation

   124

   125

		ROAD_X,    // SLOPE_NW

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		ROAD_ALL,  // SLOPE_NS

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		ROAD_ALL,  // SLOPE_ENW

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   129

		ROAD_Y,    // SLOPE_NE

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		ROAD_ALL,  // SLOPE_SEN

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		ROAD_ALL   // SLOPE_NW

   132

	}

   133

};

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   135

Foundation GetRoadFoundation(Slope tileh, RoadBits bits);

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   137

/**

   138

 * Is it allowed to remove the given road bits from the given tile?

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 * @param tile      the tile to remove the road from

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 * @param remove    the roadbits that are going to be removed

   141

 * @param owner     the actual owner of the roadbits of the tile

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 * @param rt        the road type to remove the bits from

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 * @param flags     command flags

   144

 * @param town_check Shall the town rating checked/affected

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 * @return true when it is allowed to remove the road bits

   146

 */

   147

bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, uint32 flags, bool town_check)

   148

{

   149

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

   150

   151

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

   152

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

   153

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

   154

	if (_current_player == OWNER_WATER ||

   155

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

   156

   157

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

   158

	 * by a town */

   159

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

   160

   161

	if (!town_check) return true;

   162

   163

	if (_cheats.magic_bulldozer.value) return true;

   164

   165

	Town *t = ClosestTownFromTile(tile, UINT_MAX);

   166

	if (t == NULL) return true;

   167

   168

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

   169

	 * removal allowance depends on difficulty setting */

   170

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

   171

   172

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

   173

	RoadBits n = ROAD_NONE;

   174

	RoadBits present = GetAnyRoadBits(tile, rt);

   175

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

   176

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

   177

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

   178

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

   179

   180

	int rating_decrease = RATING_ROAD_DOWN_STEP_EDGE;

   181

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

   182

	 * then allow it */

   183

	if (KillFirstBit(n) != ROAD_NONE && (n & remove) != ROAD_NONE) {

   184

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

   185

		if (!_settings_game.construction.extra_dynamite) {

   186

			SetDParam(0, t->index);

   187

			_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

   188

			return false;

   189

		}

   190

		rating_decrease = RATING_ROAD_DOWN_STEP_INNER;

   191

	}

   192

	ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM);

   193

   194

	return true;

   195

}

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   197

   198

/** Delete a piece of road.

   199

 * @param tile tile where to remove road from

   200

 * @param flags operation to perform

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 * @param pieces roadbits to remove

   202

 * @param rt roadtype to remove

   203

 * @param crossing_check should we check if there is a tram track when we are removing road from crossing?

   204

 */

   205

static CommandCost RemoveRoad(TileIndex tile, uint32 flags, RoadBits pieces, RoadType rt, bool crossing_check, bool town_check = true)

   206

{

   207

	RoadTypes rts = GetRoadTypes(tile);

   208

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

   209

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

   210

   211

	bool town_road_under_stop = false;

   212

   213

	switch (GetTileType(tile)) {

   214

		case MP_ROAD:

   215

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   216

			break;

   217

   218

		case MP_STATION:

   219

			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;

   220

			if (rt == ROADTYPE_ROAD) town_road_under_stop = GetStopBuiltOnTownRoad(tile);

   221

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   222

			break;

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   224

		case MP_TUNNELBRIDGE:

   225

			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;

   226

			if (GetVehicleTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile)) != NULL) return CMD_ERROR;

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			break;

   228

   229

		default:

   230

			return CMD_ERROR;

   231

	}

   232

   233

	if (!CheckAllowRemoveRoad(tile, pieces, town_road_under_stop ? OWNER_TOWN : GetRoadOwner(tile, rt), rt, flags, town_check)) return CMD_ERROR;

   234

   235

	if (!IsTileType(tile, MP_ROAD)) {

   236

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

   237

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

   238

   239

		CommandCost cost(EXPENSES_CONSTRUCTION);

   240

		if (IsTileType(tile, MP_TUNNELBRIDGE)) {

   241

			TileIndex other_end = GetOtherTunnelBridgeEnd(tile);

   242

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

   243

			cost.AddCost((GetTunnelBridgeLength(other_end, tile) + 2) * _price.remove_road);

   244

			if (flags & DC_EXEC) {

   245

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

   246

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

   247

   248

				/* Mark tiles diry that have been repaved */

   249

				MarkTileDirtyByTile(tile);

   250

				MarkTileDirtyByTile(other_end);

   251

				if (IsBridge(tile)) {

   252

					TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));

   253

   254

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

   255

				}

   256

			}

   257

		} else {

   258

			cost.AddCost(_price.remove_road);

   259

			if (flags & DC_EXEC) {

   260

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

   261

				MarkTileDirtyByTile(tile);

   262

			}

   263

		}

   264

		return cost;

   265

	}

   266

   267

	switch (GetRoadTileType(tile)) {

   268

		case ROAD_TILE_NORMAL: {

   269

			const Slope tileh = GetTileSlope(tile, NULL);

   270

			RoadBits present = GetRoadBits(tile, rt);

   271

			const RoadBits other = GetOtherRoadBits(tile, rt);

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			const Foundation f = GetRoadFoundation(tileh, present);

   273

   274

			if (HasRoadWorks(tile) && _current_player != OWNER_WATER) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);

   275

   276

			/* Autocomplete to a straight road

   277

			 * @li on steep slopes

   278

			 * @li if the bits of the other roadtypes result in another foundation

   279

			 * @li if build on slopes is disabled */

   280

			if (IsSteepSlope(tileh) || (IsStraightRoad(other) &&

   281

					(other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||

   282

					(tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {

   283

				pieces |= MirrorRoadBits(pieces);

   284

			}

   285

   286

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

   287

			pieces &= present;

   288

			if (pieces == ROAD_NONE) return CMD_ERROR;

   289

   290

			/* Now set present what it will be after the remove */

   291

			present ^= pieces;

   292

   293

			/* Check for invalid RoadBit combinations on slopes */

   294

			if (tileh != SLOPE_FLAT && present != ROAD_NONE &&

   295

					(present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {

   296

				return CMD_ERROR;

   297

			}

   298

   299

			if (flags & DC_EXEC) {

   300

				if (HasRoadWorks(tile)) {

   301

					/* flooding tile with road works, don't forget to remove the effect vehicle too */

   302

					assert(_current_player == OWNER_WATER);

   303

					Vehicle *v;

   304

					FOR_ALL_VEHICLES(v) {

   305

						if (v->type == VEH_EFFECT && TileVirtXY(v->x_pos, v->y_pos) == tile) {

   306

							delete v;

   307

						}

   308

					}

   309

				}

   310

				if (present == ROAD_NONE) {

   311

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

   312

					if (rts == ROADTYPES_NONE) {

   313

						/* Includes MarkTileDirtyByTile() */

   314

						DoClearSquare(tile);

   315

					} else {

   316

						SetRoadBits(tile, ROAD_NONE, rt);

   317

						SetRoadTypes(tile, rts);

   318

						MarkTileDirtyByTile(tile);

   319

					}

   320

				} else {

   321

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

   322

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

   323

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

   324

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

   325

					SetRoadBits(tile, present, rt);

   326

					MarkTileDirtyByTile(tile);

   327

				}

   328

			}

   329

   330

			/* If we change the foundation we have to pay for it. */

   331

			return CommandCost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price.remove_road +

   332

					((GetRoadFoundation(tileh, present) != f) ? _price.terraform : (Money)0));

   333

		}

   334

   335

		case ROAD_TILE_CROSSING: {

   336

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

   337

				return CMD_ERROR;

   338

			}

   339

   340

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

   341

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

   342

			if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;

   343

   344

			if (flags & DC_EXEC) {

   345

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

   346

				if (rts == ROADTYPES_NONE) {

   347

					TrackBits tracks = GetCrossingRailBits(tile);

   348

					bool reserved = GetCrossingReservation(tile);

   349

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

   350

					if (reserved) SetTrackReservation(tile, tracks);

   351

				} else {

   352

					SetRoadTypes(tile, rts);

   353

				}

   354

				MarkTileDirtyByTile(tile);

   355

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

   356

			}

   357

			return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_road * 2);

   358

		}

   359

   360

		default:

   361

		case ROAD_TILE_DEPOT:

   362

			return CMD_ERROR;

   363

	}

   364

}

   365

   366

   367

/** Delete a piece of road.

   368

 * @param tile tile where to remove road from

   369

 * @param flags operation to perform

   370

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

   371

 *           bit 4..5 road type

   372

 * @param p2 unused

   373

 */

   374

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

   375

{

   376

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

   377

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   378

   379

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

   380

   381

	return RemoveRoad(tile, flags, pieces, rt, true);

   382

}

   383

   384

/**

   385

 * Calculate the costs for roads on slopes

   386

 *  Aside modify the RoadBits to fit on the slopes

   387

 *

   388

 * @note The RoadBits are modified too!

   389

 * @param tileh The current slope

   390

 * @param pieces The RoadBits we want to add

   391

 * @param existing The existent RoadBits of the current type

   392

 * @param other The other existent RoadBits

   393

 * @return The costs for these RoadBits on this slope

   394

 */

   395

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

   396

{

   397

	/* Remove already build pieces */

   398

	CLRBITS(*pieces, existing);

   399

   400

	/* If we can't build anything stop here */

   401

	if (*pieces == ROAD_NONE) return CMD_ERROR;

   402

   403

	/* All RoadBit combos are valid on flat land */

   404

	if (tileh == SLOPE_FLAT) return CommandCost();

   405

   406

	/* Proceed steep Slopes first to reduce lookup table size */

   407

	if (IsSteepSlope(tileh)) {

   408

		/* Force straight roads. */

   409

		*pieces |= MirrorRoadBits(*pieces);

   410

   411

		/* Use existing as all existing since only straight

   412

		 * roads are allowed here. */

   413

		existing |= other;

   414

   415

		if ((existing == ROAD_NONE || existing == *pieces) && IsStraightRoad(*pieces)) {

   416

			return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);

   417

		}

   418

		return CMD_ERROR;

   419

	}

   420

   421

	/* Save the merge of all bits of the current type */

   422

	RoadBits type_bits = existing | *pieces;

   423

   424

	/* Roads on slopes */

   425

	if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {

   426

   427

		/* If we add leveling we've got to pay for it */

   428

		if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);

   429

   430

		return CommandCost();

   431

	}

   432

   433

	/* Autocomplete uphill roads */

   434

	*pieces |= MirrorRoadBits(*pieces);

   435

	type_bits = existing | *pieces;

   436

   437

	/* Uphill roads */

   438

	if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&

   439

			(_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {

   440

   441

		/* Slopes with foundation ? */

   442

		if (IsSlopeWithOneCornerRaised(tileh)) {

   443

   444

			/* Prevent build on slopes if it isn't allowed */

   445

			if (_settings_game.construction.build_on_slopes) {

   446

   447

				/* If we add foundation we've got to pay for it */

   448

				if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);

   449

   450

				return CommandCost();

   451

			}

   452

		} else {

   453

			if (CountBits(existing) == 1) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);

   454

			return CommandCost();

   455

		}

   456

	}

   457

	return CMD_ERROR;

   458

}

   459

   460

/** Build a piece of road.

   461

 * @param tile tile where to build road

   462

 * @param flags operation to perform

   463

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

   464

 *           bit 4..5 road type

   465

 *           bit 6..7 disallowed directions to toggle

   466

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

   467

 */

   468

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

   469

{

   470

	CommandCost cost(EXPENSES_CONSTRUCTION);

   471

   472

	RoadBits existing = ROAD_NONE;

   473

	RoadBits other_bits = ROAD_NONE;

   474

   475

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

   476

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

   477

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

   478

   479

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

   480

   481

	/* do not allow building 'zero' road bits, code wouldn't handle it */

   482

	if (pieces == ROAD_NONE) return CMD_ERROR;

   483

   484

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

   485