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"

     8

     9

void ShowTrainDepotWindow(uint tile);

    10

    11

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

    12

	RAIL_TYPE_NORMAL = 0,

    13

	RAIL_TYPE_SIGNALS = 0x40,

    14

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

    15

	RAIL_TYPE_DEPOT = 0xC0,

    16

	RAIL_TYPE_MASK = 0xC0,

    17

    18

	RAIL_BIT_DIAG1 = 1,  // 0

    19

	RAIL_BIT_DIAG2 = 2,  // 1

    20

	RAIL_BIT_UPPER = 4,  // 2

    21

	RAIL_BIT_LOWER = 8,  // 3

    22

	RAIL_BIT_LEFT  = 16, // 4

    23

	RAIL_BIT_RIGHT = 32, // 5

    24

	RAIL_BIT_MASK = 0x3F,

    25

    26

	RAIL_DEPOT_TRACK_MASK = 1,

    27

	RAIL_DEPOT_DIR = 3,

    28

	RAIL_DEPOT_UNUSED_BITS = 0x3C,

    29

    30

	RAIL_TYPE_CHECKPOINT = 0xC4,

    31

	RAIL_CHECKPOINT_TRACK_MASK = 1,

    32

	RAIL_CHECKPOINT_UNUSED_BITS = 0x3E,

    33

};

    34

    35

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

    36

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

    37

    38

/* Format of rail map5 byte.

    39

 * 00 abcdef  => Normal rail

    40

 * 01 abcdef  => Rail with signals

    41

 * 10 ??????  => Unused

    42

 * 11 ????dd  => Depot

    43

 *

    44

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

    45

 * value for each track is given.

    46

 */

    47

    48

/*         4

    49

 *     ---------

    50

 *    |\       /|

    51

 *    | \    1/ |

    52

 *    |  \   /  |

    53

 *    |   \ /   |

    54

 *  16|    \    |32

    55

 *    |   / \2  |

    56

 *    |  /   \  |

    57

 *    | /     \ |

    58

 *    |/       \|

    59

 *     ---------

    60

 *         8

    61

 */

    62

    63

    64

// Constants for lower part of Map2 byte.

    65

enum RailMap2Lower4 {

    66

	RAIL_MAP2LO_GROUND_MASK = 0xF,

    67

	RAIL_GROUND_BROWN = 0,

    68

	RAIL_GROUND_GREEN = 1,

    69

	RAIL_GROUND_FENCE_NW = 2,

    70

	RAIL_GROUND_FENCE_SE = 3,

    71

	RAIL_GROUND_FENCE_SENW = 4,

    72

	RAIL_GROUND_FENCE_NE = 5,

    73

	RAIL_GROUND_FENCE_SW = 6,

    74

	RAIL_GROUND_FENCE_NESW = 7,

    75

	RAIL_GROUND_FENCE_VERT1 = 8,

    76

	RAIL_GROUND_FENCE_VERT2 = 9,

    77

	RAIL_GROUND_FENCE_HORIZ1 = 10,

    78

	RAIL_GROUND_FENCE_HORIZ2 = 11,

    79

	RAIL_GROUND_ICE_DESERT = 12,

    80

};

    81

    82

    83

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

    84

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

    85

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

    86

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

    87

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

    88

 *				 similar for lower and right.

    89

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

    90

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

    91

 * MAP5:         00abcdef => rail

    92

 *               01abcdef => rail w/ signals

    93

 *               10uuuuuu => unused

    94

 *               11uuuudd => rail depot

    95

 */

    96

    97

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

    98

{

    99

	_error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION;

   100

   101

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

   102

   103

		if (map5 & trackbits) {

   104

			_error_message = STR_1007_ALREADY_BUILT;

   105

			return false;

   106

		}

   107

   108

		map5 |= trackbits;

   109

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

   110

   111

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

   112

		_error_message = STR_1007_ALREADY_BUILT;

   113

		if (map5 & trackbits)

   114

			return false;

   115

   116

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

   117

		if (!(flags&DC_NO_RAIL_OVERLAP))

   118

			return true;

   119

   120

		map5 |= trackbits;

   121

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

   122

	} else {

   123

		return false;

   124

	}

   125

}

   126

   127

   128

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

   129

   130

// set of normal ones

   131

{

   132

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

   133

	RAIL_BIT_RIGHT,

   134

	RAIL_BIT_UPPER,

   135

	RAIL_BIT_DIAG1,

   136

   137

	RAIL_BIT_LEFT,

   138

	0,

   139

	RAIL_BIT_DIAG2,

   140

	RAIL_BIT_LOWER,

   141

   142

	RAIL_BIT_LOWER,

   143

	RAIL_BIT_DIAG2,

   144

	0,

   145

	RAIL_BIT_LEFT,

   146

   147

	RAIL_BIT_DIAG1,

   148

	RAIL_BIT_UPPER,

   149

	RAIL_BIT_RIGHT,

   150

},

   151

   152

// allowed rail for an evenly raised platform

   153

{

   154

	0,

   155

	RAIL_BIT_LEFT,

   156

	RAIL_BIT_LOWER,

   157

	RAIL_BIT_DIAG2 | RAIL_BIT_LOWER | RAIL_BIT_LEFT,

   158

   159

	RAIL_BIT_RIGHT,

   160

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

   161

	RAIL_BIT_DIAG1 | RAIL_BIT_LOWER | RAIL_BIT_RIGHT,

   162

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

   163

   164

	RAIL_BIT_UPPER,

   165

	RAIL_BIT_DIAG1 | RAIL_BIT_UPPER | RAIL_BIT_LEFT,

   166

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

   167

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

   168

   169

	RAIL_BIT_DIAG2 | RAIL_BIT_UPPER | RAIL_BIT_RIGHT,

   170

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

   171

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

   172

},

   173

   174

// allowed rail on coast tile

   175

{

   176

	0,

   177

	RAIL_BIT_LEFT,

   178

	RAIL_BIT_LOWER,

   179

	RAIL_BIT_DIAG2|RAIL_BIT_LEFT|RAIL_BIT_LOWER,

   180

   181

	RAIL_BIT_RIGHT,

   182

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

   183

	RAIL_BIT_DIAG1|RAIL_BIT_RIGHT|RAIL_BIT_LOWER,

   184

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

   185

   186

	RAIL_BIT_UPPER,

   187

	RAIL_BIT_DIAG1|RAIL_BIT_LEFT|RAIL_BIT_UPPER,

   188

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

   189

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

   190

   191

	RAIL_BIT_DIAG2|RAIL_BIT_RIGHT|RAIL_BIT_UPPER,

   192

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

   193

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

   194

	},

   195

   196

	// valid railway crossings on slopes

   197

	{

   198

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

   199

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

   200

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

   201

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

   202

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

   203

	}

   204

};

   205

   206

uint GetRailFoundation(uint tileh, uint bits)

   207

{

   208

	int i;

   209

   210

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

   211

		return 0;

   212

   213

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

   214

		return tileh;

   215

   216

	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)))

   217

		return i + 15;

   218

   219

	return 0;

   220

}

   221

   222

//

   223

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

   224

{

   225

	// never allow building on top of steep tiles

   226

	if (!(tileh & 0x10)) {

   227

		rail_bits |= existing;

   228

   229

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

   230

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

   231

			return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);

   232

		}

   233

   234

		// no special foundation

   235

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

   236

			return 0;

   237

   238

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

   239

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

   240

			return existing ? 0 : _price.terraform;

   241

		}

   242

	}

   243

	return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   244

}

   245

   246

/* Build a single track.

   247

 * p1 - railroad type normal/maglev

   248

 * p2 - tile direction

   249

 */

   250

   251

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

   252

{

   253

	TileInfo ti;

   254

	int32 ret, cost = 0;

   255

	byte rail_bit = 1 << p2;

   256

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

   257

	uint tile;

   258

	byte existing = 0;

   259

	bool need_clear = false;

   260

   261

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   262

   263

	_error_message = STR_1007_ALREADY_BUILT;

   264

   265

	FindLandscapeHeight(&ti, x, y);

   266

	tile = ti.tile;

   267

   268

	// allow building rail under bridge

   269

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

   270

		return CMD_ERROR;

   271

   272

	if (ti.type == MP_TUNNELBRIDGE) {

   273

/* BUILD ON BRIDGE CODE */

   274

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

   275

			return CMD_ERROR;

   276

   277

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

   278

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

   279

   280

			if (!(flags & DC_EXEC))

   281

				return _price.build_rail;

   282

   283

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

   284

			goto set_ownership;

   285

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

   286

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

   287

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

   288

			return CMD_ERROR;

   289

		} else

   290

			goto need_clear;

   291

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

   292

		byte m5;

   293

/* BUILD ON STREET CODE */

   294

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

   295

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   296

   297

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

   298

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   299

   300

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

   301

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

   302

				if (rail_bit != 2) goto need_clear;

   303

				m5 = 0x10;

   304

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

   305

				if (rail_bit != 1) goto need_clear;

   306

				m5 = 0x18;

   307

			} else

   308

				goto need_clear;

   309

   310

			if (!(flags & DC_EXEC))

   311

				return _price.build_rail;

   312

   313

			ModifyTile(tile,

   314

				MP_SETTYPE(MP_STREET) |

   315

				MP_MAP3LO | MP_MAP3HI | MP_MAPOWNER_CURRENT | MP_MAP5,

   316

				_map_owner[tile], /* map3_lo */

   317

				p1, /* map3_hi */

   318

				m5  /* map5 */

   319

			);

   320

			goto fix_signals;

   321

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

   322

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

   323

			return CMD_ERROR;

   324

		} else

   325

			goto need_clear;

   326

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

   327

   328

/* BUILD ON RAILWAY CODE */

   329

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

   330

			goto need_clear;

   331

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

   332

			return CMD_ERROR;

   333

   334

		existing = ti.map5 & 0x3F;

   335

	} else {

   336

   337

/* DEFAULT BUILD ON CODE */

   338

need_clear:;

   339

		/* isnot_railway */

   340

		if (!(flags & DC_EXEC)) {

   341

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

   342

			if (ret == CMD_ERROR) return CMD_ERROR;

   343

			cost += ret;

   344

		}

   345

		need_clear = true;

   346

	}

   347

   348

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

   349

	if (ret & 0x80000000)

   350

		return ret;

   351

	cost += ret;

   352

   353

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

   354

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

   355

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   356

   357

	if (flags & DC_EXEC && need_clear) {

   358

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

   359

		if (ret == CMD_ERROR) return CMD_ERROR;

   360

		cost += ret;

   361

	}

   362

   363

	if (flags & DC_EXEC) {

   364

		_map_type_and_height[tile] &= 0xF;

   365

		_map_type_and_height[tile] |= MP_RAILWAY << 4;

   366

		_map5[tile] |= rail_bit;

   367

		_map2[tile] &= ~RAIL_MAP2LO_GROUND_MASK;

   368

   369

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

   370

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

   371

			_map2[tile] &= ~0xF0;

   372

   373

set_ownership:

   374

		_map_owner[tile] = _current_player;

   375

   376

		_map3_lo[tile] &= ~0xF;

   377

		_map3_lo[tile] |= rail_type;

   378

   379

		MarkTileDirtyByTile(tile);

   380

   381

fix_signals:

   382

		SetSignalsOnBothDir(tile, (byte)p2);

   383

	}

   384

   385

	return cost + _price.build_rail;

   386

}

   387

   388

static const byte _signals_table[] = {

   389

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

   390

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

   391

};

   392

   393

static const byte _signals_table_other[] = {

   394

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

   395

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

   396

};

   397

   398

static const byte _signals_table_both[] = {

   399

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

   400

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

   401

};

   402

   403

   404

/* Remove a single track.

   405

 * p1 - unused

   406

 * p2 - tile direction

   407

 */

   408

   409

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

   410

{

   411

	TileInfo ti;

   412

	byte rail_bit = 1 << p2;

   413

	byte m5;

   414

	uint tile;

   415

   416

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   417

   418

	FindLandscapeHeight(&ti, x, y);

   419

   420

	tile = ti.tile;

   421

   422

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

   423

		return CMD_ERROR;

   424

   425

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

   426

		return CMD_ERROR;

   427

   428

	// allow building rail under bridge

   429

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

   430

		return CMD_ERROR;

   431

   432

	if (ti.type == MP_TUNNELBRIDGE) {

   433

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

   434

			return CMD_ERROR;

   435

   436

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

   437

			return CMD_ERROR;

   438

   439

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

   440

			return CMD_ERROR;

   441

   442

		if (!(flags & DC_EXEC))

   443

			return _price.remove_rail;

   444

   445

		_map_owner[tile] = OWNER_NONE;

   446

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

   447

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

   448

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

   449

			return CMD_ERROR;

   450

   451

		if (ti.map5 & 0xE0)

   452

			return CMD_ERROR;

   453

   454

		if (ti.map5 & 8) {

   455

			m5 = 5;

   456

			if (rail_bit != 1)

   457

				return CMD_ERROR;

   458

		} else {

   459

			m5 = 10;

   460

			if (rail_bit != 2)

   461

				return CMD_ERROR;

   462

		}

   463

   464

		if (!(flags & DC_EXEC))

   465

			return _price.remove_rail;

   466

   467

		_map5[tile] = m5;

   468

		_map_owner[tile] = _map3_lo[tile];

   469

		_map2[tile] = 0;

   470

	} else {

   471

		assert(ti.type == MP_RAILWAY);

   472

   473

		if (ti.map5 & RAIL_TYPE_SPECIAL)

   474

			return CMD_ERROR;

   475

   476

		if (!(ti.map5 & rail_bit))

   477

			return CMD_ERROR;

   478

   479

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

   480

		if (ti.map5 & RAIL_TYPE_SIGNALS) {

   481

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

   482

				return CMD_ERROR;

   483

		}

   484

   485

		if (!(flags & DC_EXEC))

   486

			return _price.remove_rail;

   487

   488

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

   489

			DoClearSquare(tile);

   490

			goto skip_mark_dirty;

   491

		}

   492

	}

   493

   494

	/* mark_dirty */

   495

	MarkTileDirtyByTile(tile);

   496

   497

skip_mark_dirty:;

   498

   499

	SetSignalsOnBothDir(tile, (byte)p2);

   500

   501

	return _price.remove_rail;

   502

}

   503

   504

static const struct {

   505

	int8 xinc[16];

   506

	int8 yinc[16];

   507

	byte initial[16];

   508

} _railbit = {{

   509

//  0   1   2    3   4   5

   510

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

   511

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

   512

},{

   513

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

   514

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

   515

},{

   516

	5,  1, 0,4, // normal

   517

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

   518

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

   519

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

   520

}};

   521

   522