1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

     6

#include "rail_map.h"

     7

#include "road_map.h"

     8

#include "table/sprites.h"

     9

#include "table/strings.h"

    10

#include "functions.h"

    11

#include "map.h"

    12

#include "tile.h"

    13

#include "vehicle.h"

    14

#include "viewport.h"

    15

#include "command.h"

    16

#include "player.h"

    17

#include "town.h"

    18

#include "gfx.h"

    19

#include "sound.h"

    20

#include "depot.h"

    21

    22

void RoadVehEnterDepot(Vehicle *v);

    23

    24

    25

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

    26

{

    27

	RoadBits present;

    28

	RoadBits n;

    29

	byte owner;

    30

	*edge_road = true;

    31

    32

	if (_game_mode == GM_EDITOR) return true;

    33

    34

	// Only do the special processing for actual players.

    35

	if (_current_player >= MAX_PLAYERS) return true;

    36

    37

	// A railway crossing has the road owner in the map3_lo byte.

    38

	if (IsTileType(tile, MP_STREET) && IsLevelCrossing(tile)) {

    39

		owner = _m[tile].m3;

    40

	} else {

    41

		owner = GetTileOwner(tile);

    42

	}

    43

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

    44

	// by a town

    45

	if (owner != OWNER_TOWN) {

    46

		return owner == OWNER_NONE || CheckOwnership(owner);

    47

	}

    48

    49

	if (_cheats.magic_bulldozer.value) return true;

    50

    51

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

    52

	n = 0;

    53

	present = GetAnyRoadBits(tile);

    54

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

    55

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

    56

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

    57

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

    58

    59

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

    60

	// then allow it

    61

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

    62

		Town *t;

    63

		*edge_road = false;

    64

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

    65

		if (_patches.extra_dynamite) return true;

    66

    67

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    68

    69

		SetDParam(0, t->index);

    70

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    71

		return false;

    72

	}

    73

    74

	return true;

    75

}

    76

    77

    78

/** Delete a piece of road.

    79

 * @param x,y tile coordinates for road construction

    80

 * @param p1 road piece flags

    81

 * @param p2 unused

    82

 */

    83

int32 CmdRemoveRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)

    84

{

    85

	// cost for removing inner/edge -roads

    86

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

    87

    88

	TileInfo ti;

    89

	int32 cost;

    90

	TileIndex tile;

    91

	PlayerID owner;

    92

	Town *t;

    93

	/* true if the roadpiece was always removeable,

    94

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

    95

	bool edge_road;

    96

	RoadBits pieces;

    97

    98

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

    99

   100

	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) */

   101

	if (p1 >> 4) return CMD_ERROR;

   102

	pieces = p1;

   103

   104

	FindLandscapeHeight(&ti, x, y);

   105

	tile = ti.tile;

   106

   107

	if (!IsTileType(tile, MP_STREET) && !IsTileType(tile, MP_TUNNELBRIDGE)) return CMD_ERROR;

   108

   109

	// owner for railroad crossing is stored somewhere else

   110

	// XXX - Fix this so for a given tiletype the owner of the type is in the same variable

   111

	owner = IsLevelCrossing(tile) ? _m[tile].m3 : GetTileOwner(tile);

   112

   113

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

   114

		if (IsTileType(tile, MP_TUNNELBRIDGE)) { // index of town is not saved for bridge (no space)

   115

			t = ClosestTownFromTile(tile, _patches.dist_local_authority);

   116

		} else {

   117

			t = GetTown(_m[tile].m2);

   118

		}

   119

	} else {

   120

		t = NULL;

   121

	}

   122

   123

	// allow deleting road under bridge

   124

	if (ti.type != MP_TUNNELBRIDGE && !EnsureNoVehicle(tile)) return CMD_ERROR;

   125

   126

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

   127

   128

	switch (ti.type) {

   129

		case MP_TUNNELBRIDGE:

   130

			if (!EnsureNoVehicleZ(tile, TilePixelHeight(tile))) return CMD_ERROR;

   131

   132

			if ((ti.map5 & 0xE9) == 0xE8) {

   133

				if (pieces & ROAD_X) return CMD_ERROR;

   134

			} else if ((ti.map5 & 0xE9) == 0xE9) {

   135

				if (pieces & ROAD_Y) return CMD_ERROR;

   136

			} else {

   137

				return CMD_ERROR;

   138

			}

   139

   140

			cost = _price.remove_road * 2;

   141

   142

			if (flags & DC_EXEC) {

   143

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

   144

				SetClearUnderBridge(tile);

   145

				MarkTileDirtyByTile(tile);

   146

			}

   147

			return cost;

   148

   149

		case MP_STREET:

   150

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

   151

			// removal allowance depends on difficulty setting

   152

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

   153

   154

			switch (GetRoadType(ti.tile)) {

   155

				case ROAD_NORMAL: {

   156

					RoadBits present = GetRoadBits(ti.tile);

   157

					RoadBits c = pieces;

   158

   159

					if (ti.tileh != 0  && (present == ROAD_Y || present == ROAD_X)) {

   160

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

   161

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

   162

					}

   163

   164

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

   165

					c &= present;

   166

					if (c == 0) return CMD_ERROR;

   167

   168

					// calculate the cost

   169

					cost = 0;

   170

					if (c & ROAD_NW) cost += _price.remove_road;

   171

					if (c & ROAD_SW) cost += _price.remove_road;

   172

					if (c & ROAD_SE) cost += _price.remove_road;

   173

					if (c & ROAD_NE) cost += _price.remove_road;

   174

   175

					if (flags & DC_EXEC) {

   176

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

   177

   178

						present ^= c;

   179

						if (present == 0) {

   180

							DoClearSquare(tile);

   181

						} else {

   182

							SetRoadBits(tile, present);

   183

							MarkTileDirtyByTile(tile);

   184

						}

   185

					}

   186

					return cost;

   187

				}

   188

   189

				case ROAD_CROSSING: {

   190

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

   191

						return CMD_ERROR;

   192

					}

   193

   194

					cost = _price.remove_road * 2;

   195

					if (flags & DC_EXEC) {

   196

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

   197

   198

						MakeRailNormal(tile, GetTileOwner(tile), GetCrossingRailBits(tile), GB(_m[tile].m4, 0, 4));

   199

						MarkTileDirtyByTile(tile);

   200

					}

   201

					return cost;

   202

				}

   203

   204

				default:

   205

				case ROAD_DEPOT:

   206

					return CMD_ERROR;

   207

			}

   208

   209

		default: return CMD_ERROR;

   210

	}

   211

}

   212

   213

   214

static const RoadBits _valid_tileh_slopes_road[][15] = {

   215

	// set of normal ones

   216

	{

   217

		ROAD_ALL, 0, 0,

   218

		ROAD_X,   0, 0,  // 3, 4, 5

   219

		ROAD_Y,   0, 0,

   220

		ROAD_Y,   0, 0,  // 9, 10, 11

   221

		ROAD_X,   0, 0

   222

	},

   223

	// allowed road for an evenly raised platform

   224

	{

   225

		0,

   226

		ROAD_SW | ROAD_NW,

   227

		ROAD_SW | ROAD_SE,

   228

		ROAD_Y  | ROAD_SW,

   229

   230

		ROAD_SE | ROAD_NE, // 4

   231

		ROAD_ALL,

   232

		ROAD_X  | ROAD_SE,

   233

		ROAD_ALL,

   234

   235

		ROAD_NW | ROAD_NE, // 8

   236

		ROAD_X  | ROAD_NW,

   237

		ROAD_ALL,

   238

		ROAD_ALL,

   239

   240

		ROAD_Y  | ROAD_NE, // 12

   241

		ROAD_ALL,

   242

		ROAD_ALL

   243

	},

   244

};

   245

   246

   247

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

   248

{

   249

	if (!IsSteepTileh(tileh)) {

   250

		RoadBits road_bits = *pieces | existing;

   251

   252

		// no special foundation

   253

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

   254

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

   255

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

   256

			return 0; // no extra cost

   257

		}

   258

   259

		// foundation is used. Whole tile is leveled up

   260

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

   261

			return existing ? 0 : _price.terraform;

   262

		}

   263

   264

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

   265

		if (existing == 0 && (tileh == 1 || tileh == 2 || tileh == 4 || tileh == 8)) {

   266

			// force full pieces.

   267

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

   268

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

   269

			return (*pieces == ROAD_X || *pieces == ROAD_Y) ? _price.terraform : CMD_ERROR;

   270

		}

   271

	}

   272

	return CMD_ERROR;

   273

}

   274

   275

/** Build a piece of road.

   276

 * @param x,y tile coordinates for road construction

   277

 * @param p1 road piece flags

   278

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

   279

 */

   280

int32 CmdBuildRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)

   281

{

   282

	TileInfo ti;

   283

	int32 cost;

   284

	RoadBits existing = 0;

   285

	RoadBits pieces;

   286

	TileIndex tile;

   287

   288

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   289

   290

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

   291

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

   292

	if ((p1 >> 4) || (_current_player < MAX_PLAYERS && p2 != 0) || !IsTownIndex(p2)) return CMD_ERROR;

   293

	pieces = p1;

   294

   295

	FindLandscapeHeight(&ti, x, y);

   296

	tile = ti.tile;

   297

   298

	// allow building road under bridge

   299

	if (ti.type != MP_TUNNELBRIDGE && !EnsureNoVehicle(tile)) return CMD_ERROR;

   300

   301

	switch (ti.type) {

   302

		case MP_STREET:

   303

			switch (GetRoadType(tile)) {

   304

				case ROAD_NORMAL:

   305

					existing = GetRoadBits(tile);

   306

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

   307

						return_cmd_error(STR_1007_ALREADY_BUILT);

   308

					}

   309

					break;

   310

   311

				case ROAD_CROSSING:

   312

					if (pieces != GetCrossingRoadBits(tile)) { // XXX is this correct?

   313

						return_cmd_error(STR_1007_ALREADY_BUILT);

   314

					}

   315

					goto do_clear;

   316

   317

				default:

   318

				case ROAD_DEPOT:

   319

					goto do_clear;

   320

			}

   321

			break;

   322

   323

		case MP_RAILWAY: {

   324

			Axis roaddir;

   325

   326

			if (IsSteepTileh(ti.tileh)) { // very steep tile

   327

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   328

			}

   329

   330

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

   331

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

   332

			if (!HASBIT(M(14) | M(13) | M(11) | M(10) | M(7) | M(5) | M(0), ti.tileh)) {

   333

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   334

			}

   335

#undef M

   336

   337

			if (ti.map5 == 2) {

   338

				if (pieces & ROAD_Y) goto do_clear;

   339

				roaddir = AXIS_X;

   340

			} else if (ti.map5 == 1) {

   341

				if (pieces & ROAD_X) goto do_clear;

   342

				roaddir = AXIS_Y;

   343

			} else {

   344

				goto do_clear;

   345

			}

   346

   347

			if (flags & DC_EXEC) {

   348

				MakeRoadCrossing(tile, _current_player, GetTileOwner(tile), roaddir, GB(_m[tile].m3, 0, 4), p2);

   349

				MarkTileDirtyByTile(tile);

   350

			}

   351

			return _price.build_road * 2;

   352

		}

   353

   354

		case MP_TUNNELBRIDGE:

   355

			/* check for flat land */

   356

			if (IsSteepTileh(ti.tileh)) { // very steep tile

   357

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   358

			}

   359

   360

			/* is this middle part of a bridge? */

   361

			if ((ti.map5 & 0xC0) != 0xC0) goto do_clear;

   362

   363

			/* only allow roads pertendicular to bridge */

   364

			if (((pieces & ROAD_Y) != 0) == ((ti.map5 & 0x01U) != 0)) goto do_clear;

   365

   366

			/* check if clear land under bridge */

   367

			if ((ti.map5 & 0xF8) == 0xE8) { /* road under bridge */

   368

				return_cmd_error(STR_1007_ALREADY_BUILT);

   369

			} else if ((ti.map5 & 0xE0) == 0xE0) { /* other transport route under bridge */

   370

				return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   371

			} else if ((ti.map5 & 0xF8) == 0xC8) { /* water under bridge */

   372

				return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   373

			}

   374

   375

			/* all checked, can build road now! */

   376

			cost = _price.build_road * 2;

   377

			if (flags & DC_EXEC) {

   378

				SetRoadUnderBridge(tile, _current_player);

   379

				MarkTileDirtyByTile(tile);

   380

			}

   381

			return cost;

   382

   383

		default:

   384

do_clear:;

   385

			if (CmdFailed(DoCommandByTile(tile, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR)))

   386

				return CMD_ERROR;

   387

	}

   388

   389

	cost = CheckRoadSlope(ti.tileh, &pieces, existing);

   390

	if (CmdFailed(cost)) return_cmd_error(STR_1800_LAND_SLOPED_IN_WRONG_DIRECTION);

   391

   392

	if (cost && (!_patches.build_on_slopes || _is_old_ai_player))

   393

		return CMD_ERROR;

   394

   395

	if (ti.type == MP_STREET && GetRoadType(tile) == ROAD_NORMAL) {

   396

		// Don't put the pieces that already exist

   397

		pieces &= ComplementRoadBits(existing);

   398

	} else {

   399

		cost += DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   400

	}

   401

   402

	if (pieces & ROAD_NW) cost += _price.build_road;

   403

	if (pieces & ROAD_SW) cost += _price.build_road;

   404

	if (pieces & ROAD_SE) cost += _price.build_road;

   405

	if (pieces & ROAD_NE) cost += _price.build_road;

   406

   407

	if (flags & DC_EXEC) {

   408

		if (ti.type == MP_STREET) {

   409

			SetRoadBits(tile, existing | pieces);

   410

		} else {

   411

			MakeRoadNormal(tile, _current_player, pieces, p2);

   412

		}

   413

   414

		MarkTileDirtyByTile(tile);

   415

	}

   416

	return cost;

   417

}

   418

   419

int32 DoConvertStreetRail(TileIndex tile, uint totype, bool exec)

   420

{

   421

	// not a railroad crossing?

   422

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   423

   424

	// not owned by me?

   425

	if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile)) return CMD_ERROR;

   426

   427

	// tile is already of requested type?

   428

	if (GB(_m[tile].m4, 0, 4) == totype) return CMD_ERROR;

   429

   430

	if (exec) {

   431

		// change type.

   432

		SB(_m[tile].m4, 0, 4, totype);

   433

		MarkTileDirtyByTile(tile);

   434

	}

   435

   436

	return _price.build_rail >> 1;

   437

}

   438

   439

   440

/** Build a long piece of road.

   441

 * @param x,y end tile of drag

   442

 * @param p1 start tile of drag

   443

 * @param p2 various bitstuffed elements

   444

 * - p2 = (bit 0) - start tile starts in the 2nd half of tile (p2 & 1)

   445

 * - p2 = (bit 1) - end tile starts in the 2nd half of tile (p2 & 2)

   446

 * - p2 = (bit 2) - direction: 0 = along x-axis, 1 = along y-axis (p2 & 4)

   447

 */

   448

int32 CmdBuildLongRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)

   449

{

   450

	TileIndex start_tile, end_tile, tile;

   451

	int32 cost, ret;

   452

   453

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   454

   455

	if (p1 >= MapSize()) return CMD_ERROR;

   456

   457

	start_tile = p1;

   458

	end_tile = TileVirtXY(x, y);

   459

   460

	/* Only drag in X or Y direction dictated by the direction variable */

   461

	if (!HASBIT(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis

   462

	if (HASBIT(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis

   463

   464

	/* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */

   465

	if (start_tile > end_tile || (start_tile == end_tile && HASBIT(p2, 0))) {

   466

		TileIndex t = start_tile;

   467

		start_tile = end_tile;

   468

		end_tile = t;

   469

		p2 ^= IS_INT_INSIDE(p2&3, 1, 3) ? 3 : 0;

   470

	}

   471

   472

	cost = 0;

   473

	tile = start_tile;

   474

	// Start tile is the small number.

   475

	for (;;) {

   476

		RoadBits bits = HASBIT(p2, 2) ? ROAD_Y : ROAD_X;

   477

   478

		if (tile == end_tile && !HASBIT(p2, 1)) bits &= ROAD_NW | ROAD_NE;

   479

		if (tile == start_tile && HASBIT(p2, 0)) bits &= ROAD_SE | ROAD_SW;

   480

   481

		ret = DoCommandByTile(tile, bits, 0, flags, CMD_BUILD_ROAD);

   482

		if (CmdFailed(ret)) {

   483

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   484

		} else {

   485

			cost += ret;

   486

		}

   487

   488

		if (tile == end_tile) break;

   489

   490

		tile += HASBIT(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);

   491

	}

   492