1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "vehicle.h"

     4

#include "viewport.h"

     5

#include "command.h"

     6

#include "pathfind.h"

     7

#include "town.h"

     9

    10

void ShowTrainDepotWindow(uint tile);

    11

    12

enum { /* These values are bitmasks for the map5 byte */

    13

	RAIL_TYPE_NORMAL = 0,

    14

	RAIL_TYPE_SIGNALS = 0x40,

    15

	RAIL_TYPE_SPECIAL = 0x80, // If this bit is set, then it's not a regular track.

    16

	RAIL_TYPE_DEPOT = 0xC0,

    17

	RAIL_TYPE_MASK = 0xC0,

    18

    19

	RAIL_BIT_DIAG1 = 1,  // 0

    20

	RAIL_BIT_DIAG2 = 2,  // 1

    21

	RAIL_BIT_UPPER = 4,  // 2

    22

	RAIL_BIT_LOWER = 8,  // 3

    23

	RAIL_BIT_LEFT  = 16, // 4

    24

	RAIL_BIT_RIGHT = 32, // 5

    25

	RAIL_BIT_MASK = 0x3F,

    26

    27

	RAIL_DEPOT_TRACK_MASK = 1,

    28

	RAIL_DEPOT_DIR = 3,

    29

	RAIL_DEPOT_UNUSED_BITS = 0x3C,

    30

    31

	RAIL_TYPE_CHECKPOINT = 0xC4,

    32

	RAIL_CHECKPOINT_TRACK_MASK = 1,

    33

	RAIL_CHECKPOINT_UNUSED_BITS = 0x3E,

    34

};

    35

    36

#define IS_RAIL_DEPOT(x) (((x) & (RAIL_TYPE_DEPOT|RAIL_DEPOT_UNUSED_BITS)) == RAIL_TYPE_DEPOT)

    37

#define IS_RAIL_CHECKPOINT(x) (((x) & (RAIL_TYPE_CHECKPOINT|RAIL_CHECKPOINT_UNUSED_BITS)) == RAIL_TYPE_CHECKPOINT)

    38

    39

/* Format of rail map5 byte.

    40

 * 00 abcdef  => Normal rail

    41

 * 01 abcdef  => Rail with signals

    42

 * 10 ??????  => Unused

    43

 * 11 ????dd  => Depot

    44

 *

    45

 * abcdef is a bitmask, which contains ones for all present tracks. Below the

    46

 * value for each track is given.

    47

 */

    48

    49

/*         4

    50

 *     ---------

    51

 *    |\       /|

    52

 *    | \    1/ |

    53

 *    |  \   /  |

    54

 *    |   \ /   |

    55

 *  16|    \    |32

    56

 *    |   / \2  |

    57

 *    |  /   \  |

    58

 *    | /     \ |

    59

 *    |/       \|

    60

 *     ---------

    61

 *         8

    62

 */

    63

    64

    65

// Constants for lower part of Map2 byte.

    66

enum RailMap2Lower4 {

    67

	RAIL_MAP2LO_GROUND_MASK = 0xF,

    68

	RAIL_GROUND_BROWN = 0,

    69

	RAIL_GROUND_GREEN = 1,

    70

	RAIL_GROUND_FENCE_NW = 2,

    71

	RAIL_GROUND_FENCE_SE = 3,

    72

	RAIL_GROUND_FENCE_SENW = 4,

    73

	RAIL_GROUND_FENCE_NE = 5,

    74

	RAIL_GROUND_FENCE_SW = 6,

    75

	RAIL_GROUND_FENCE_NESW = 7,

    76

	RAIL_GROUND_FENCE_VERT1 = 8,

    77

	RAIL_GROUND_FENCE_VERT2 = 9,

    78

	RAIL_GROUND_FENCE_HORIZ1 = 10,

    79

	RAIL_GROUND_FENCE_HORIZ2 = 11,

    80

	RAIL_GROUND_ICE_DESERT = 12,

    81

};

    82

    83

    84

/* MAP2 byte:    abcd???? => Signal On? Same coding as map3lo

    85

 * MAP3LO byte:  abcd???? => Signal Exists?

    86

 *				 a and b are for diagonals, upper and left,

    87

 *				 one for each direction. (ie a == NE->SW, b ==

    88

 *				 SW->NE, or v.v., I don't know. b and c are

    89

 *				 similar for lower and right.

    90

 * MAP2 byte:    ????abcd => Type of ground.

    91

 * MAP3LO byte:  ????abcd => Type of rail.

    92

 * MAP5:         00abcdef => rail

    93

 *               01abcdef => rail w/ signals

    94

 *               10uuuuuu => unused

    95

 *               11uuuudd => rail depot

    96

 */

    97

    98

static bool CheckTrackCombination(byte map5, byte trackbits, byte flags)

    99

{

   100

	_error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION;

   101

   102

	if ((map5&RAIL_TYPE_MASK) == RAIL_TYPE_SIGNALS) {

   103

   104

		if (map5 & trackbits) {

   105

			_error_message = STR_1007_ALREADY_BUILT;

   106

			return false;

   107

		}

   108

   109

		map5 |= trackbits;

   110

		return (map5 == (RAIL_TYPE_SIGNALS|RAIL_BIT_UPPER|RAIL_BIT_LOWER) || map5 == (RAIL_TYPE_SIGNALS|RAIL_BIT_LEFT|RAIL_BIT_RIGHT));

   111

   112

	} else if ((map5&RAIL_TYPE_MASK) == RAIL_TYPE_NORMAL) {

   113

		_error_message = STR_1007_ALREADY_BUILT;

   114

		if (map5 & trackbits)

   115

			return false;

   116

   117

		// Computer players are not allowed to intersect pieces of rail.

   118

		if (!(flags&DC_NO_RAIL_OVERLAP))

   119

			return true;

   120

   121

		map5 |= trackbits;

   122

		return (map5 == (RAIL_BIT_UPPER|RAIL_BIT_LOWER) || map5 == (RAIL_BIT_LEFT|RAIL_BIT_RIGHT));

   123

	} else {

   124

		return false;

   125

	}

   126

}

   127

   128

   129

static const byte _valid_tileh_slopes[4][15] = {

   130

   131

// set of normal ones

   132

{

   133

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   134

	RAIL_BIT_RIGHT,

   135

	RAIL_BIT_UPPER,

   136

	RAIL_BIT_DIAG1,

   137

   138

	RAIL_BIT_LEFT,

   139

	0,

   140

	RAIL_BIT_DIAG2,

   141

	RAIL_BIT_LOWER,

   142

   143

	RAIL_BIT_LOWER,

   144

	RAIL_BIT_DIAG2,

   145

	0,

   146

	RAIL_BIT_LEFT,

   147

   148

	RAIL_BIT_DIAG1,

   149

	RAIL_BIT_UPPER,

   150

	RAIL_BIT_RIGHT,

   151

},

   152

   153

// allowed rail for an evenly raised platform

   154

{

   155

	0,

   156

	RAIL_BIT_LEFT,

   157

	RAIL_BIT_LOWER,

   158

	RAIL_BIT_DIAG2 | RAIL_BIT_LOWER | RAIL_BIT_LEFT,

   159

   160

	RAIL_BIT_RIGHT,

   161

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   162

	RAIL_BIT_DIAG1 | RAIL_BIT_LOWER | RAIL_BIT_RIGHT,

   163

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   164

   165

	RAIL_BIT_UPPER,

   166

	RAIL_BIT_DIAG1 | RAIL_BIT_UPPER | RAIL_BIT_LEFT,

   167

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   168

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   169

   170

	RAIL_BIT_DIAG2 | RAIL_BIT_UPPER | RAIL_BIT_RIGHT,

   171

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   172

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   173

},

   174

   175

// allowed rail on coast tile

   176

{

   177

	0,

   178

	RAIL_BIT_LEFT,

   179

	RAIL_BIT_LOWER,

   180

	RAIL_BIT_DIAG2|RAIL_BIT_LEFT|RAIL_BIT_LOWER,

   181

   182

	RAIL_BIT_RIGHT,

   183

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   184

	RAIL_BIT_DIAG1|RAIL_BIT_RIGHT|RAIL_BIT_LOWER,

   185

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   186

   187

	RAIL_BIT_UPPER,

   188

	RAIL_BIT_DIAG1|RAIL_BIT_LEFT|RAIL_BIT_UPPER,

   189

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   190

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   191

   192

	RAIL_BIT_DIAG2|RAIL_BIT_RIGHT|RAIL_BIT_UPPER,

   193

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   194

	RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,

   195

	},

   196

   197

	// valid railway crossings on slopes

   198

	{

   199

		1, 0, 0, // 0, 1, 2

   200

		0, 0, 1, // 3, 4, 5

   201

		0, 1, 0, // 6, 7, 8

   202

		0, 1, 1, // 9, 10, 11

   203

		0, 1, 1, // 12, 13, 14

   204

	}

   205

};

   206

   207

uint GetRailFoundation(uint tileh, uint bits)

   208

{

   209

	int i;

   210

   211

	if ((~_valid_tileh_slopes[0][tileh] & bits) == 0)

   212

		return 0;

   213

   214

	if ((~_valid_tileh_slopes[1][tileh] & bits) == 0)

   215

		return tileh;

   216

   217

	if ( ((i=0, tileh == 1) || (i+=2, tileh == 2) || (i+=2, tileh == 4) || (i+=2, tileh == 8)) && (bits == RAIL_BIT_DIAG1 || (i++, bits == RAIL_BIT_DIAG2)))

   218

		return i + 15;

   219

   220

	return 0;

   221

}

   222

   223

//

   224

static uint32 CheckRailSlope(int tileh, uint rail_bits, uint existing, uint tile)

   225

{

   226

	// never allow building on top of steep tiles

   227

	if (!(tileh & 0x10)) {

   228

		rail_bits |= existing;

   229

   230

		// don't allow building on the lower side of a coast

   231

		if (IS_TILETYPE(tile, MP_WATER) && ~_valid_tileh_slopes[2][tileh] & rail_bits) {

   232

			return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   233

		}

   234

   235

		// no special foundation

   236

		if ((~_valid_tileh_slopes[0][tileh] & rail_bits) == 0)

   237

			return 0;

   238

   239

		if (((~_valid_tileh_slopes[1][tileh] & rail_bits) == 0) || // whole tile is leveled up

   240

			((rail_bits == RAIL_BIT_DIAG1 || rail_bits == RAIL_BIT_DIAG2) && (tileh == 1 || tileh == 2 || tileh == 4 || tileh == 8))) { // partly up

   241

			return existing ? 0 : _price.terraform;

   242

		}

   243

	}

   244

	return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   245

}

   246

   247

/* Build a single track.

   248

 * p1 - railroad type normal/maglev

   249

 * p2 - tile direction

   250

 */

   251

   252

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

   253

{

   254

	TileInfo ti;

   255

	int32 ret, cost = 0;

   256

	byte rail_bit = 1 << p2;

   257

	byte rail_type = (byte)(p1 & 0xF);

   258

	uint tile;

   259

	byte existing = 0;

   260

	bool need_clear = false;

   261

   262

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   263

   264

	_error_message = STR_1007_ALREADY_BUILT;

   265

   266

	FindLandscapeHeight(&ti, x, y);

   267

	tile = ti.tile;

   268

   269

	// allow building rail under bridge

   270

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

   271

		return CMD_ERROR;

   272

   273

	if (ti.type == MP_TUNNELBRIDGE) {

   274

/* BUILD ON BRIDGE CODE */

   275

		if (!EnsureNoVehicleZ(tile, GET_TILEHEIGHT(tile)))

   276

			return CMD_ERROR;

   277

   278

		if ((ti.map5 & 0xF8) == 0xC0) {

   279

			if (ti.tileh & 0x10 || rail_bit != (byte)((ti.map5 & 1) ? 1 : 2)) goto need_clear;

   280

   281

			if (!(flags & DC_EXEC))

   282

				return _price.build_rail;

   283

   284

			_map5[tile] = (ti.map5 & 0xC7) | 0x20;

   285

			goto set_ownership;

   286

		} else if ((ti.map5 & 0xF8) == 0xE0) {

   287

			if ((_map3_lo[tile] & 0xF) != (int)p1) goto need_clear;

   288

			if (rail_bit != (byte)((ti.map5 & 1) ? 1 : 2)) goto need_clear;

   289

			return CMD_ERROR;

   290

		} else

   291

			goto need_clear;

   292

	} else if (ti.type == MP_STREET) {

   293

		byte m5;

   294

/* BUILD ON STREET CODE */

   295

		if (ti.tileh & 0x10) // very steep tile

   296

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   297

   298

		if (!_valid_tileh_slopes[3][ti.tileh]) // prevent certain slopes

   299

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   300

   301

		if (!(ti.map5 & 0xF0)) {

   302

			if ((ti.map5 & 0x0F) == 0xA) {

   303

				if (rail_bit != 2) goto need_clear;

   304

				m5 = 0x10;

   305

			} else if ((ti.map5 & 0x0F) == 0x5) {

   306

				if (rail_bit != 1) goto need_clear;

   307

				m5 = 0x18;

   308

			} else

   309

				goto need_clear;

   310

   311

			if (!(flags & DC_EXEC))

   312

				return _price.build_rail;

   313

   314

			ModifyTile(tile,

   315

				MP_SETTYPE(MP_STREET) |

   316

				MP_MAP3LO | MP_MAP3HI | MP_MAPOWNER_CURRENT | MP_MAP5,

   317

				_map_owner[tile], /* map3_lo */

   318

				p1, /* map3_hi */

   319

				m5  /* map5 */

   320

			);

   321

			goto fix_signals;

   322

		} else if (!(ti.map5 & 0xE0)) {

   323

			if (rail_bit != (byte)((ti.map5 & 8) ? 1 : 2)) goto need_clear;

   324

			return CMD_ERROR;

   325

		} else

   326

			goto need_clear;

   327

	} else if (ti.type == MP_RAILWAY) {

   328

   329

/* BUILD ON RAILWAY CODE */

   330

		if (_map_owner[tile] != _current_player || (byte)(_map3_lo[tile]&0xF) != rail_type)

   331

			goto need_clear;

   332

		if (!CheckTrackCombination(ti.map5, rail_bit, (byte)flags))

   333

			return CMD_ERROR;

   334

   335

		existing = ti.map5 & 0x3F;

   336

	} else {

   337

   338

/* DEFAULT BUILD ON CODE */

   339

need_clear:;

   340

		/* isnot_railway */

   341

		if (!(flags & DC_EXEC)) {

   342

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

   343

			if (ret == CMD_ERROR) return CMD_ERROR;

   344

			cost += ret;

   345

		}

   346

		need_clear = true;

   347

	}

   348

   349

	ret = CheckRailSlope(ti.tileh, rail_bit, existing, tile);

   350

	if (ret & 0x80000000)

   351

		return ret;

   352

	cost += ret;

   353

   354

	// the AI is not allowed to used foundationed tiles.

   355

	if (ret && (!_patches.build_on_slopes || (!_patches.ainew_active && _is_ai_player)))

   356

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   357

   358

	if (flags & DC_EXEC && need_clear) {

   359

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

   360

		if (ret == CMD_ERROR) return CMD_ERROR;

   361

		cost += ret;

   362

	}

   363

   364

	if (flags & DC_EXEC) {

   365

		_map_type_and_height[tile] &= 0xF;

   366

		_map_type_and_height[tile] |= MP_RAILWAY << 4;

   367

		_map5[tile] |= rail_bit;

   368

		_map2[tile] &= ~RAIL_MAP2LO_GROUND_MASK;

   369

   370

		// In case it's a tile without signals, clear the signal bits. Why?

   371

		if ((_map5[tile] & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS)

   372

			_map2[tile] &= ~0xF0;

   373

   374

set_ownership:

   375

		_map_owner[tile] = _current_player;

   376

   377

		_map3_lo[tile] &= ~0xF;

   378

		_map3_lo[tile] |= rail_type;

   379

   380

		MarkTileDirtyByTile(tile);

   381

   382

fix_signals:

   383

		SetSignalsOnBothDir(tile, (byte)p2);

   384

	}

   385

   386

	return cost + _price.build_rail;

   387

}

   388

   389

static const byte _signals_table[] = {

   390

	0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0, // direction 1

   391

	0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0  // direction 2

   392

};

   393

   394

static const byte _signals_table_other[] = {

   395

	0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0, // direction 1

   396

	0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0  // direction 2

   397

};

   398

   399

static const byte _signals_table_both[] = {

   400

	0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30, 0, 0,	// both directions combined

   401

	0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30, 0, 0

   402

};

   403

   404

   405

/* Remove a single track.

   406

 * p1 - unused

   407

 * p2 - tile direction

   408

 */

   409

   410

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

   411

{

   412

	TileInfo ti;

   413

	byte rail_bit = 1 << p2;

   414

	byte m5;

   415

	uint tile;

   416

   417

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   418

   419

	FindLandscapeHeight(&ti, x, y);

   420

   421

	tile = ti.tile;

   422

   423

	if (!((1<<ti.type) & ((1<<MP_TUNNELBRIDGE)|(1<<MP_STREET)|(1<<MP_RAILWAY))))

   424

		return CMD_ERROR;

   425

   426

	if (_current_player != OWNER_WATER && !CheckTileOwnership(tile))

   427

		return CMD_ERROR;

   428

   429

	// allow building rail under bridge

   430

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

   431

		return CMD_ERROR;

   432

   433

	if (ti.type == MP_TUNNELBRIDGE) {

   434

		if (!EnsureNoVehicleZ(tile, GET_TILEHEIGHT(tile)))

   435

			return CMD_ERROR;

   436

   437

		if ((ti.map5 & 0xF8) != 0xE0)

   438

			return CMD_ERROR;

   439

   440

		if ( ((ti.map5 & 1) ? 1 : 2) != rail_bit )

   441

			return CMD_ERROR;

   442

   443

		if (!(flags & DC_EXEC))

   444

			return _price.remove_rail;

   445

   446

		_map_owner[tile] = OWNER_NONE;

   447

		_map5[tile] = ti.map5 & 0xC7;

   448

	} else if (ti.type == MP_STREET) {

   449

		if (!(ti.map5 & 0xF0))

   450

			return CMD_ERROR;

   451

   452

		if (ti.map5 & 0xE0)

   453

			return CMD_ERROR;

   454

   455

		if (ti.map5 & 8) {

   456

			m5 = 5;

   457

			if (rail_bit != 1)

   458

				return CMD_ERROR;

   459

		} else {

   460

			m5 = 10;

   461

			if (rail_bit != 2)

   462

				return CMD_ERROR;

   463

		}

   464

   465

		if (!(flags & DC_EXEC))

   466

			return _price.remove_rail;

   467

   468

		_map5[tile] = m5;

   469

		_map_owner[tile] = _map3_lo[tile];

   470

		_map2[tile] = 0;

   471

	} else {

   472

		assert(ti.type == MP_RAILWAY);

   473

   474

		if (ti.map5 & RAIL_TYPE_SPECIAL)

   475

			return CMD_ERROR;

   476

   477

		if (!(ti.map5 & rail_bit))

   478

			return CMD_ERROR;

   479

   480

		// don't allow remove if there are signals on the track

   481

		if (ti.map5 & RAIL_TYPE_SIGNALS) {

   482

			if (_map3_lo[tile] & _signals_table_both[p2])

   483

				return CMD_ERROR;

   484

		}

   485

   486

		if (!(flags & DC_EXEC))

   487

			return _price.remove_rail;

   488

   489

		if ( (_map5[tile] ^= rail_bit) == 0) {

   490

			DoClearSquare(tile);

   491

			goto skip_mark_dirty;

   492

		}

   493

	}

   494

   495

	/* mark_dirty */

   496

	MarkTileDirtyByTile(tile);

   497

   498

skip_mark_dirty:;

   499

   500

	SetSignalsOnBothDir(tile, (byte)p2);

   501

   502

	return _price.remove_rail;

   503

}

   504

   505

static const struct {

   506

	int8 xinc[16];

   507

	int8 yinc[16];

   508

	byte initial[16];

   509

} _railbit = {{

   510

//  0   1   2    3   4   5

   511

	 16,  0,-16,   0, 16,  0,    0,  0,

   512

	-16,  0,  0,  16,  0,-16,    0,  0,

   513

},{

   514

	0,   16,  0,  16,  0, 16,    0,  0,

   515

	0,  -16, -16,  0,-16,  0,    0,  0,

   516

},{

   517

	5,  1, 0,4, // normal

   518

	2,  1, 8,3, // x > sx

   519

	10, 9, 0,11, // y > sy

   520

	13, 9, 8,12, // x > sx && y > sy

   521

}};

   522