1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "table/strings.h"

     6

#include "functions.h"

     7

#include "map.h"

     8

#include "player.h"

     9

#include "tile.h"

    10

#include "viewport.h"

    11

#include "command.h"

    12

#include "variables.h"

    13

    14

typedef struct TerraformerHeightMod {

    15

	TileIndex tile;

    16

	byte height;

    17

} TerraformerHeightMod;

    18

    19

typedef struct TerraformerState {

    20

	int height[4];

    21

	uint32 flags;

    22

    23

	int direction;

    24

	int modheight_count;

    25

	int tile_table_count;

    26

    27

	int32 cost;

    28

    29

	TileIndex *tile_table;

    30

	TerraformerHeightMod *modheight;

    31

    32

} TerraformerState;

    33

    34

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    35

{

    36

	TileIndex *t;

    37

	int count;

    38

    39

	if (TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY())

    40

		return -1;

    41

    42

	t = ts->tile_table;

    43

	for(count = ts->tile_table_count; count != 0; count--,t++) {

    44

		if (*t == tile)

    45

			return 0;

    46

	}

    47

    48

	return 1;

    49

}

    50

    51

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    52

{

    53

	TerraformerHeightMod *mod = ts->modheight;

    54

	int count;

    55

    56

	for(count = ts->modheight_count; count != 0; count--, mod++) {

    57

		if (mod->tile == tile)

    58

			return mod->height;

    59

	}

    60

    61

	return TileHeight(tile);

    62

}

    63

    64

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    65

{

    66

	int count;

    67

	TileIndex *t;

    68

    69

	count = ts->tile_table_count;

    70

    71

	if (count >= 625)

    72

		return;

    73

    74

	for(t = ts->tile_table; count != 0; count--,t++) {

    75

		if (*t == tile)

    76

			return;

    77

	}

    78

    79

	ts->tile_table[ts->tile_table_count++] = tile;

    80

}

    81

    82

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    83

{

    84

	TerraformAddDirtyTile(ts, tile + TileDiffXY( 0, -1));

    85

	TerraformAddDirtyTile(ts, tile + TileDiffXY(-1, -1));

    86

	TerraformAddDirtyTile(ts, tile + TileDiffXY(-1,  0));

    87

	TerraformAddDirtyTile(ts, tile);

    88

}

    89

    90

static int TerraformProc(TerraformerState *ts, TileIndex tile, int mode)

    91

{

    92

	int r;

    93

	int32 ret;

    94

    95

	assert(tile < MapSize());

    96

    97

	if ((r=TerraformAllowTileProcess(ts, tile)) <= 0)

    98

		return r;

    99

   100

	if (IsTileType(tile, MP_RAILWAY)) {

   101

		static const byte _railway_modes[4] = {8, 0x10, 4, 0x20};

   102

		static const byte _railway_dangslopes[4] = {0xd, 0xe, 7, 0xb};

   103

		static const byte _railway_dangslopes2[4] = {0x2, 0x1, 0x8, 0x4};

   104

   105

		// Nothing could be built at the steep slope - this avoids a bug

   106

		// when you have a single diagonal track in one corner on a

   107

		// basement and then you raise/lower the other corner.

   108

		int tileh = GetTileSlope(tile, NULL) & 0xF;

   109

		if (tileh == _railway_dangslopes[mode] ||

   110

				tileh == _railway_dangslopes2[mode]) {

   111

			_terraform_err_tile = tile;

   112

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   113

			return -1;

   114

		}

   115

   116

		// If we have a single diagonal track there, the other side of

   117

		// tile can be terraformed.

   118

		if ((_m[tile].m5&~0x40) == _railway_modes[mode])

   119

			return 0;

   120

	}

   121

   122

	ret = DoCommandByTile(tile, 0,0, ts->flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR);

   123

   124

	if (ret == CMD_ERROR) {

   125

		_terraform_err_tile = tile;

   126

		return -1;

   127

	}

   128

   129

	ts->cost += ret;

   130

   131

	if (ts->tile_table_count >= 625)

   132

		return -1;

   133

	ts->tile_table[ts->tile_table_count++] = tile;

   134

   135

	return 0;

   136

}

   137

   138

static bool TerraformTileHeight(TerraformerState *ts, TileIndex tile, int height)

   139

{

   140

	int nh;

   141

	TerraformerHeightMod *mod;

   142

	int count;

   143

   144

	assert(tile < MapSize());

   145

   146

	if (height < 0) {

   147

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   148

		return false;

   149

	}

   150

   151

	_error_message = STR_1004_TOO_HIGH;

   152

   153

	if (height > 0xF)

   154

		return false;

   155

   156

	nh = TerraformGetHeightOfTile(ts, tile);

   157

	if (nh < 0 || height == nh)

   158

		return false;

   159

   160

	if (TerraformProc(ts, tile, 0) < 0) return false;

   161

	if (TerraformProc(ts, tile + TileDiffXY( 0, -1), 1) < 0) return false;

   162

	if (TerraformProc(ts, tile + TileDiffXY(-1, -1), 2) < 0) return false;

   163

	if (TerraformProc(ts, tile + TileDiffXY(-1,  0), 3) < 0) return false;

   164

   165

	mod = ts->modheight;

   166

	count = ts->modheight_count;

   167

   168

	for(;;) {

   169

		if (count == 0) {

   170

			if (ts->modheight_count >= 576)

   171

				return false;

   172

			ts->modheight_count++;

   173

			break;

   174

		}

   175

		if (mod->tile == tile) break;

   176

		mod++;

   177

		count--;

   178

	}

   179

   180

	mod->tile = tile;

   181

	mod->height = (byte)height;

   182

   183

	ts->cost += _price.terraform;

   184

   185

	{

   186

		int direction = ts->direction, r;

   187

		const TileIndexDiffC *ttm;

   188

   189

		static const TileIndexDiffC _terraform_tilepos[] = {

   190

			{ 1,  0},

   191

			{-2,  0},

   192

			{ 1,  1},

   193

			{ 0, -2}

   194

		};

   195

   196

		for(ttm = _terraform_tilepos; ttm != endof(_terraform_tilepos); ttm++) {

   197

			tile += ToTileIndexDiff(*ttm);

   198

   199

			r = TerraformGetHeightOfTile(ts, tile);

   200

			if (r != height && r-direction != height && r+direction != height) {

   201

				if (!TerraformTileHeight(ts, tile, r+direction))

   202

					return false;

   203

			}

   204

		}

   205

	}

   206

   207

	return true;

   208

}

   209

   210

/** Terraform land

   211

 * @param x,y coordinates to terraform

   212

 * @param p1 corners to terraform.

   213

 * @param p2 direction; eg up or down

   214

 */

   215

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

   216

{

   217

	TerraformerState ts;

   218

	TileIndex tile;

   219

	int direction;

   220

   221

	TerraformerHeightMod modheight_data[576];

   222

	TileIndex tile_table_data[625];

   223

   224

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   225

   226

	_error_message = INVALID_STRING_ID;

   227

	_terraform_err_tile = 0;

   228

   229

	ts.direction = direction = p2 ? 1 : -1;

   230

	ts.flags = flags;

   231

	ts.modheight_count = ts.tile_table_count = 0;

   232

	ts.cost = 0;

   233

	ts.modheight = modheight_data;

   234

	ts.tile_table = tile_table_data;

   235

   236

	tile = TileVirtXY(x, y);

   237

   238

	/* Make an extra check for map-bounds cause we add tiles to the originating tile */

   239

	if (tile + TileDiffXY(1, 1) > MapSize()) return CMD_ERROR;

   240

   241

	if (p1 & 1) {

   242

		if (!TerraformTileHeight(&ts, tile + TileDiffXY(1, 0),

   243

				TileHeight(tile + TileDiffXY(1, 0)) + direction))

   244

					return CMD_ERROR;

   245

	}

   246

   247

	if (p1 & 2) {

   248

		if (!TerraformTileHeight(&ts, tile + TileDiffXY(1, 1),

   249

				TileHeight(tile + TileDiffXY(1, 1)) + direction))

   250

					return CMD_ERROR;

   251

	}

   252

   253

	if (p1 & 4) {

   254

		if (!TerraformTileHeight(&ts, tile + TileDiffXY(0, 1),

   255

				TileHeight(tile + TileDiffXY(0, 1)) + direction))

   256

					return CMD_ERROR;

   257

	}

   258

   259

	if (p1 & 8) {

   260

		if (!TerraformTileHeight(&ts, tile + TileDiffXY(0, 0),

   261

				TileHeight(tile + TileDiffXY(0, 0)) + direction))

   262

					return CMD_ERROR;

   263

	}

   264

   265

	if (direction == -1) {

   266

		/* Check if tunnel would take damage */

   267

		int count;

   268

		TileIndex *ti = ts.tile_table;

   269

   270

		for (count = ts.tile_table_count; count != 0; count--, ti++) {

   271

			uint z, t;

   272

			TileIndex tile = *ti;

   273

   274

			z = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(0, 0));

   275

			t = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(1, 0));

   276

			if (t <= z) z = t;

   277

			t = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(1, 1));

   278

			if (t <= z) z = t;

   279

			t = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(0, 1));

   280

			if (t <= z) z = t;

   281

   282

			if (!CheckTunnelInWay(tile, z*8))

   283

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   284

		}

   285

	}

   286

   287

	if (flags & DC_EXEC) {

   288

		/* Clear the landscape at the tiles */

   289

		{

   290

			int count;

   291

			TileIndex *ti = ts.tile_table;

   292

			for (count = ts.tile_table_count; count != 0; count--, ti++) {

   293

				DoCommandByTile(*ti, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   294

			}

   295

		}

   296

   297

		/* change the height */

   298

		{

   299

			int count;

   300

			TerraformerHeightMod *mod;

   301

   302

			mod = ts.modheight;

   303

			for (count = ts.modheight_count; count != 0; count--, mod++) {

   304

				TileIndex til = mod->tile;

   305

   306

				SetTileHeight(til, mod->height);

   307

				TerraformAddDirtyTileAround(&ts, til);

   308

			}

   309

		}

   310

   311

		/* finally mark the dirty tiles dirty */

   312

		{

   313

			int count;

   314

			TileIndex *ti = ts.tile_table;

   315

			for (count = ts.tile_table_count; count != 0; count--, ti++) {

   316

				MarkTileDirtyByTile(*ti);

   317

			}

   318

		}

   319

	}

   320

	return ts.cost;

   321

}

   322

   323

   324

/** Levels a selected (rectangle) area of land

   325

 * @param x,y end tile of area-drag

   326

 * @param p1 start tile of area drag

   327

 * @param p2 unused

   328

 */

   329

int32 CmdLevelLand(int ex, int ey, uint32 flags, uint32 p1, uint32 p2)

   330

{

   331

	int size_x, size_y;

   332

	int sx, sy;

   333

	uint h, curh;

   334

	TileIndex tile;

   335

	int32 ret, cost, money;

   336

   337

	if (p1 > MapSize()) return CMD_ERROR;

   338

   339

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   340

   341

	// remember level height

   342

	h = TileHeight(p1);

   343

   344

	ex >>= 4; ey >>= 4;

   345

   346

	// make sure sx,sy are smaller than ex,ey

   347

	sx = TileX(p1);

   348

	sy = TileY(p1);

   349

	if (ex < sx) intswap(ex, sx);

   350

	if (ey < sy) intswap(ey, sy);

   351

	tile = TileXY(sx, sy);

   352

   353

	size_x = ex-sx+1;

   354

	size_y = ey-sy+1;

   355

   356

	money = GetAvailableMoneyForCommand();

   357

	cost = 0;

   358

   359

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   360

		curh = TileHeight(tile2);

   361

		while (curh != h) {

   362

			ret = DoCommandByTile(tile2, 8, (curh > h) ? 0 : 1, flags & ~DC_EXEC, CMD_TERRAFORM_LAND);

   363

			if (CmdFailed(ret)) break;

   364

			cost += ret;

   365

   366

			if (flags & DC_EXEC) {

   367

				if ((money -= ret) < 0) {

   368

					_additional_cash_required = ret;

   369

					return cost - ret;

   370

				}

   371

				DoCommandByTile(tile2, 8, (curh > h) ? 0 : 1, flags, CMD_TERRAFORM_LAND);

   372

			}

   373

   374

			curh += (curh > h) ? -1 : 1;

   375

		}

   376

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   377

   378

	return (cost == 0) ? CMD_ERROR : cost;

   379

}

   380

   381

/** Purchase a land area. Actually you only purchase one tile, so

   382

 * the name is a bit confusing ;p

   383

 * @param x,y the tile the player is purchasing

   384

 * @param p1 unused

   385

 * @param p2 unused

   386

 */

   387

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

   388

{

   389

	TileIndex tile;

   390

	int32 cost;

   391

   392

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   393

   394

	tile = TileVirtXY(x, y);

   395

   396

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   397

   398

	if (IsTileType(tile, MP_UNMOVABLE) && _m[tile].m5 == 3 &&

   399

			IsTileOwner(tile, _current_player))

   400

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   401

   402

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

   403

	if (CmdFailed(cost)) return CMD_ERROR;

   404

   405

	if (flags & DC_EXEC) {

   406

		ModifyTile(tile,

   407

			MP_SETTYPE(MP_UNMOVABLE) | MP_MAPOWNER_CURRENT | MP_MAP5,

   408

			3 /* map5 */

   409

			);

   410

	}

   411

   412

	return cost + _price.purchase_land * 10;

   413

}

   414

   415

   416

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   417

{

   418

	static const int32 null = 0;

   419

	static const int32* clear_price_table[] = {

   420

		&null,

   421

		&_price.clear_1,

   422

		&_price.clear_1,

   423

		&_price.clear_1,

   424

		&_price.purchase_land,

   425

		&_price.purchase_land,

   426

		&_price.purchase_land,

   427

		&_price.purchase_land,

   428

		&_price.clear_2,

   429

		&_price.clear_2,

   430

		&_price.clear_2,

   431

		&_price.clear_2,

   432

		&_price.clear_3,

   433

		&_price.clear_3,

   434

		&_price.clear_3,

   435

		&_price.clear_3,

   436

		&_price.purchase_land,

   437

		&_price.purchase_land,

   438

		&_price.purchase_land,

   439

		&_price.purchase_land,

   440

		&_price.purchase_land,

   441

		&_price.purchase_land,

   442

		&_price.purchase_land,

   443

		&_price.purchase_land,

   444

		&_price.clear_2,

   445

		&_price.clear_2,

   446

		&_price.clear_2,

   447

		&_price.clear_2,

   448

	};

   449

	const int32 *price = clear_price_table[GB(_m[tile].m5, 0, 5)];

   450

   451

	if (flags & DC_EXEC) DoClearSquare(tile);

   452

   453

	return *price;

   454

}

   455

   456

/** Sell a land area. Actually you only sell one tile, so

   457

 * the name is a bit confusing ;p

   458

 * @param x,y the tile the player is selling

   459

 * @param p1 unused

   460

 * @param p2 unused

   461

 */

   462

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

   463

{

   464

	TileIndex tile;

   465

   466

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   467

   468

	tile = TileVirtXY(x, y);

   469

   470

	if (!IsTileType(tile, MP_UNMOVABLE) || _m[tile].m5 != 3) return CMD_ERROR;

   471

	if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER) return CMD_ERROR;

   472

   473

   474

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   475

   476

	if (flags & DC_EXEC)

   477

		DoClearSquare(tile);

   478

   479

	return - _price.purchase_land * 2;

   480

}

   481

   482

   483

#include "table/clear_land.h"

   484

   485

   486

void DrawClearLandTile(const TileInfo *ti, byte set)

   487

{

   488

	DrawGroundSprite(0xF54 + _tileh_to_sprite[ti->tileh] + set * 19);

   489

}

   490

   491

void DrawHillyLandTile(const TileInfo *ti)

   492

{

   493

	if (ti->tileh != 0) {

   494

		DrawGroundSprite(0xFA0 + _tileh_to_sprite[ti->tileh]);

   495

	} else {

   496

		DrawGroundSprite(_landscape_clear_sprites[GB(ti->x ^ ti->y, 4, 3)]);

   497

	}

   498

}

   499

   500

void DrawClearLandFence(const TileInfo *ti)

   501

{

   502

	byte m4 = _m[ti->tile].m4;

   503

	byte z = ti->z;

   504

   505

	if (ti->tileh & 2) {

   506

		z += 8;

   507

		if (ti->tileh == 0x17)