1

#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "table/strings.h"

     4

#include "map.h"

     5

#include "tile.h"

     6

#include "viewport.h"

     7

#include "command.h"

     8

     9

typedef struct TerraformerHeightMod {

    10

	TileIndex tile;

    11

	byte height;

    12

} TerraformerHeightMod;

    13

    14

typedef struct TerraformerState {

    15

	int height[4];

    16

	uint32 flags;

    17

    18

	int direction;

    19

	int modheight_count;

    20

	int tile_table_count;

    21

    22

	int32 cost;

    23

    24

	TileIndex *tile_table;

    25

	TerraformerHeightMod *modheight;

    26

    27

} TerraformerState;

    28

    29

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    30

{

    31

	TileIndex *t;

    32

	int count;

    33

    34

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

    35

		return -1;

    36

    37

	t = ts->tile_table;

    38

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

    39

		if (*t == tile)

    40

			return 0;

    41

	}

    42

    43

	return 1;

    44

}

    45

    46

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    47

{

    48

	TerraformerHeightMod *mod = ts->modheight;

    49

	int count;

    50

    51

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

    52

		if (mod->tile == tile)

    53

			return mod->height;

    54

	}

    55

    56

	return TileHeight(tile);

    57

}

    58

    59

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    60

{

    61

	int count;

    62

	TileIndex *t;

    63

    64

	count = ts->tile_table_count;

    65

    66

	if (count >= 625)

    67

		return;

    68

    69

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

    70

		if (*t == tile)

    71

			return;

    72

	}

    73

    74

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

    75

}

    76

    77

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    78

{

    79

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

    80

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

    81

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

    82

	TerraformAddDirtyTile(ts, tile);

    83

}

    84

    85

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

    86

{

    87

	int r;

    88

	int32 ret;

    89

    90

	assert(tile < MapSize());

    91

    92

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

    93

		return r;

    94

    95

	if (IsTileType(tile, MP_RAILWAY)) {

    96

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

    97

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

    98

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

    99

   100

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

   101

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

   102

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

   103

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

   104

		if (tileh == _railway_dangslopes[mode] ||

   105

				tileh == _railway_dangslopes2[mode]) {

   106

			_terraform_err_tile = tile;

   107

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   108

			return -1;

   109

		}

   110

   111

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

   112

		// tile can be terraformed.

   114

			return 0;

   115

	}

   116

   117

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

   118

   119

	if (ret == CMD_ERROR) {

   120

		_terraform_err_tile = tile;

   121

		return -1;

   122

	}

   123

   124

	ts->cost += ret;

   125

   126

	if (ts->tile_table_count >= 625)

   127

		return -1;

   128

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

   129

   130

	return 0;

   131

}

   132

   133

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

   134

{

   135

	int nh;

   136

	TerraformerHeightMod *mod;

   137

	int count;

   138

   139

	assert(tile < MapSize());

   140

   141

	if (height < 0) {

   142

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   143

		return false;

   144

	}

   145

   146

	_error_message = STR_1004_TOO_HIGH;

   147

   148

	if (height > 0xF)

   149

		return false;

   150

   151

	nh = TerraformGetHeightOfTile(ts, tile);

   152

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

   153

		return false;

   154

   155

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

   156

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

   157

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

   158

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

   159

   160

	mod = ts->modheight;

   161

	count = ts->modheight_count;

   162

   163

	for(;;) {

   164

		if (count == 0) {

   165

			if (ts->modheight_count >= 576)

   166

				return false;

   167

			ts->modheight_count++;

   168

			break;

   169

		}

   170

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

   171

		mod++;

   172

		count--;

   173

	}

   174

   175

	mod->tile = tile;

   176

	mod->height = (byte)height;

   177

   178

	ts->cost += _price.terraform;

   179

   180

	{

   181

		int direction = ts->direction, r;

   182

		const TileIndexDiffC *ttm;

   183

   184

		static const TileIndexDiffC _terraform_tilepos[] = {

   185

			{ 1,  0},

   186

			{-2,  0},

   187

			{ 1,  1},

   188

			{ 0, -2}

   189

		};

   190

   191

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

   192

			tile += ToTileIndexDiff(*ttm);

   193

   194

			r = TerraformGetHeightOfTile(ts, tile);

   195

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

   196

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

   197

					return false;

   198

			}

   199

		}

   200

	}

   201

   202

	return true;

   203

}

   204

   205

/** Terraform land

   206

 * @param x,y coordinates to terraform

   207

 * @param p1 corners to terraform.

   208

 * @param p2 direction; eg up or down

   209

 */

   210

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

   211

{

   212

	TerraformerState ts;

   213

	TileIndex tile;

   214

	int direction;

   215

   216

	TerraformerHeightMod modheight_data[576];

   217

	TileIndex tile_table_data[625];

   218

   219

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   220

   221

	_error_message = INVALID_STRING_ID;

   222

	_terraform_err_tile = 0;

   223

   224

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

   225

	ts.flags = flags;

   226

	ts.modheight_count = ts.tile_table_count = 0;

   227

	ts.cost = 0;

   228

	ts.modheight = modheight_data;

   229

	ts.tile_table = tile_table_data;

   230

   231

	tile = TileVirtXY(x, y);

   232

   233

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

   234

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

   235

   236

	if (p1 & 1) {

   237

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

   238

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

   239

					return CMD_ERROR;

   240

	}

   241

   242

	if (p1 & 2) {

   243

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

   244

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

   245

					return CMD_ERROR;

   246

	}

   247

   248

	if (p1 & 4) {

   249

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

   250

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

   251

					return CMD_ERROR;

   252

	}

   253

   254

	if (p1 & 8) {

   255

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

   256

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

   257

					return CMD_ERROR;

   258

	}

   259

   260

	if (direction == -1) {

   261

		/* Check if tunnel would take damage */

   262

		int count;

   263

		TileIndex *ti = ts.tile_table;

   264

   265

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

   266

			uint z, t;

   267

			TileIndex tile = *ti;

   268

   269

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

   270

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

   271

			if (t <= z) z = t;

   272

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

   273

			if (t <= z) z = t;

   274

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

   275

			if (t <= z) z = t;

   276

   277

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

   278

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   279

		}

   280

	}

   281

   282

	if (flags & DC_EXEC) {

   283

		/* Clear the landscape at the tiles */

   284

		{

   285

			int count;

   286

			TileIndex *ti = ts.tile_table;

   287

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

   288

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

   289

			}

   290

		}

   291

   292

		/* change the height */

   293

		{

   294

			int count;

   295

			TerraformerHeightMod *mod;

   296

   297

			mod = ts.modheight;

   298

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

   299

				TileIndex til = mod->tile;

   300

   301

				SetTileHeight(til, mod->height);

   302

				TerraformAddDirtyTileAround(&ts, til);

   303

			}

   304

		}

   305

   306

		/* finally mark the dirty tiles dirty */

   307

		{

   308

			int count;

   309

			TileIndex *ti = ts.tile_table;

   310

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

   311

				MarkTileDirtyByTile(*ti);

   312

			}

   313

		}

   314

	}

   315

	return ts.cost;

   316

}

   317

   318

   319

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

   320

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

   321

 * @param p1 start tile of area drag

   322

 * @param p2 unused

   323

 */

   324

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

   325

{

   326

	int size_x, size_y;

   327

	int sx, sy;

   328

	uint h, curh;

   329

	TileIndex tile;

   330

	int32 ret, cost, money;

   331

   332

	if (p1 > MapSize()) return CMD_ERROR;

   333

   334

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   335

   336

	// remember level height

   337

	h = TileHeight(p1);

   338

   339

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

   340

   341

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

   342

	sx = TileX(p1);

   343

	sy = TileY(p1);

   344

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

   345

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

   346

	tile = TileXY(sx, sy);

   347

   348

	size_x = ex-sx+1;

   349

	size_y = ey-sy+1;

   350

   351

	money = GetAvailableMoneyForCommand();

   352

	cost = 0;

   353

   354

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   355

		curh = TileHeight(tile2);

   356

		while (curh != h) {

   357

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

   358

			if (CmdFailed(ret)) break;

   359

			cost += ret;

   360

   361

			if (flags & DC_EXEC) {

   362

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

   363

					_additional_cash_required = ret;

   364

					return cost - ret;

   365

				}

   366

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

   367

			}

   368

   369

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

   370

		}

   371

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   372

   373

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

   374

}

   375

   376

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

   377

 * the name is a bit confusing ;p

   378

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

   379

 * @param p1 unused

   380

 * @param p2 unused

   381

 */

   382

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

   383

{

   384

	TileIndex tile;

   385

	int32 cost;

   386

   387

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   388

   389

	tile = TileVirtXY(x, y);

   390

   391

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   392

   394

			IsTileOwner(tile, _current_player))

   395

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   396

   397

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

   398

	if (CmdFailed(cost)) return CMD_ERROR;

   399

   400

	if (flags & DC_EXEC) {

   401

		ModifyTile(tile,

   402

			MP_SETTYPE(MP_UNMOVABLE) | MP_MAPOWNER_CURRENT | MP_MAP5,

   403

			3 /* map5 */

   404

			);

   405

	}

   406

   407

	return cost + _price.purchase_land * 10;

   408

}

   409

   410

   411

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   412

{

   413

	static const int32 * _clear_price_table[] = {

   414

			NULL,

   415

			&_price.clear_1, &_price.clear_1,&_price.clear_1,

   416

			&_price.purchase_land,&_price.purchase_land,&_price.purchase_land,&_price.purchase_land,

   417

			&_price.clear_2,&_price.clear_2,&_price.clear_2,&_price.clear_2,

   418

			&_price.clear_3,&_price.clear_3,&_price.clear_3,&_price.clear_3,

   419

			&_price.purchase_land,&_price.purchase_land,&_price.purchase_land,&_price.purchase_land,

   420

			&_price.purchase_land,&_price.purchase_land,&_price.purchase_land,&_price.purchase_land,

   421

			&_price.clear_2,&_price.clear_2,&_price.clear_2,&_price.clear_2,

   422

	};

   424

   425

	if (flags & DC_EXEC)

   426

		DoClearSquare(tile);

   427

   428

	if (price == NULL)

   429

		return 0;

   430

	return *price;

   431

}

   432

   433

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

   434

 * the name is a bit confusing ;p

   435

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

   436

 * @param p1 unused

   437

 * @param p2 unused

   438

 */

   439

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

   440

{

   441

	TileIndex tile;

   442

   443

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   444

   445

	tile = TileVirtXY(x, y);

   446

   448

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

   449

   450

   451

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   452

   453

	if (flags & DC_EXEC)

   454

		DoClearSquare(tile);

   455

   456

	return - _price.purchase_land * 2;

   457

}

   458

   459

   460

#include "table/clear_land.h"

   461

   462

   463

void DrawClearLandTile(TileInfo *ti, byte set)

   464

{

   465

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

   466

}

   467

   468

void DrawHillyLandTile(TileInfo *ti)

   469

{

   470

	if (ti->tileh != 0) {

   471

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

   472

	} else {

   473

		DrawGroundSprite(_landscape_clear_sprites[((ti->x^ti->y) >> 4) & 0x7]);

   474

	}

   475

}

   476

   477

void DrawClearLandFence(TileInfo *ti, byte img)

   478

{

   479

	byte z = ti->z;

   480

   481

	if (ti->tileh & 2) {

   482

		z += 8;

   483

		if (ti->tileh == 0x17)

   484

			z += 8;

   485

	}

   486

   487

	if (img & 0x38) {

   488

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[((img >> 3) & 7) - 1] + _fence_mod_by_tileh[ti->tileh], ti->x, ti->y, z);

   489

	}

   490

   491

	if (img & 0x7) {

   492

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[(img & 7) - 1] + _fence_mod_by_tileh_2[ti->tileh], ti->x, ti->y, z);

   493

	}

   494

}

   495

   496

static void DrawTile_Clear(TileInfo *ti)

   497

{

   498

   499

	switch((ti->map5 & (7<<2)) >> 2) {

   500

	case 0:

   501

		DrawClearLandTile(ti, (ti->map5 & 3));

   502

		break;

   503

   504

	case 1:

   505

		DrawHillyLandTile(ti);

   506

		break;

   507

   508

	case 2:

   509

		DrawGroundSprite(0xFB7 + _tileh_to_sprite[ti->tileh]);

   510

		break;

   511