1

#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "table/strings.h"

     5

#include "map.h"

     6

#include "player.h"

     7

#include "tile.h"

     8

#include "viewport.h"

     9

#include "command.h"

    10

#include "variables.h"

    11

    12

typedef struct TerraformerHeightMod {

    13

	TileIndex tile;

    14

	byte height;

    15

} TerraformerHeightMod;

    16

    17

typedef struct TerraformerState {

    18

	int height[4];

    19

	uint32 flags;

    20

    21

	int direction;

    22

	int modheight_count;

    23

	int tile_table_count;

    24

    25

	int32 cost;

    26

    27

	TileIndex *tile_table;

    28

	TerraformerHeightMod *modheight;

    29

    30

} TerraformerState;

    31

    32

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    33

{

    34

	TileIndex *t;

    35

	int count;

    36

    37

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

    38

		return -1;

    39

    40

	t = ts->tile_table;

    41

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

    42

		if (*t == tile)

    43

			return 0;

    44

	}

    45

    46

	return 1;

    47

}

    48

    49

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    50

{

    51

	TerraformerHeightMod *mod = ts->modheight;

    52

	int count;

    53

    54

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

    55

		if (mod->tile == tile)

    56

			return mod->height;

    57

	}

    58

    59

	return TileHeight(tile);

    60

}

    61

    62

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    63

{

    64

	int count;

    65

	TileIndex *t;

    66

    67

	count = ts->tile_table_count;

    68

    69

	if (count >= 625)

    70

		return;

    71

    72

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

    73

		if (*t == tile)

    74

			return;

    75

	}

    76

    77

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

    78

}

    79

    80

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    81

{

    82

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

    83

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

    84

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

    85

	TerraformAddDirtyTile(ts, tile);

    86

}

    87

    88

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

    89

{

    90

	int r;

    91

	int32 ret;

    92

    93

	assert(tile < MapSize());

    94

    95

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

    96

		return r;

    97

    98

	if (IsTileType(tile, MP_RAILWAY)) {

    99

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

   100

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

   101

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

   102

   103

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

   104

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

   105

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

   106

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

   107

		if (tileh == _railway_dangslopes[mode] ||

   108

				tileh == _railway_dangslopes2[mode]) {

   109

			_terraform_err_tile = tile;

   110

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   111

			return -1;

   112

		}

   113

   114

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

   115

		// tile can be terraformed.

   116

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

   117

			return 0;

   118

	}

   119

   120

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

   121

   122

	if (ret == CMD_ERROR) {

   123

		_terraform_err_tile = tile;

   124

		return -1;

   125

	}

   126

   127

	ts->cost += ret;

   128

   129

	if (ts->tile_table_count >= 625)

   130

		return -1;

   131

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

   132

   133

	return 0;

   134

}

   135

   136

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

   137

{

   138

	int nh;

   139

	TerraformerHeightMod *mod;

   140

	int count;

   141

   142

	assert(tile < MapSize());

   143

   144

	if (height < 0) {

   145

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   146

		return false;

   147

	}

   148

   149

	_error_message = STR_1004_TOO_HIGH;

   150

   151

	if (height > 0xF)

   152

		return false;

   153

   154

	nh = TerraformGetHeightOfTile(ts, tile);

   155

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

   156

		return false;

   157

   158

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

   159

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

   160

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

   161

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

   162

   163

	mod = ts->modheight;

   164

	count = ts->modheight_count;

   165

   166

	for(;;) {

   167

		if (count == 0) {

   168

			if (ts->modheight_count >= 576)

   169

				return false;

   170

			ts->modheight_count++;

   171

			break;

   172

		}

   173

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

   174

		mod++;

   175

		count--;

   176

	}

   177

   178

	mod->tile = tile;

   179

	mod->height = (byte)height;

   180

   181

	ts->cost += _price.terraform;

   182

   183

	{

   184

		int direction = ts->direction, r;

   185

		const TileIndexDiffC *ttm;

   186

   187

		static const TileIndexDiffC _terraform_tilepos[] = {

   188

			{ 1,  0},

   189

			{-2,  0},

   190

			{ 1,  1},

   191

			{ 0, -2}

   192

		};

   193

   194

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

   195

			tile += ToTileIndexDiff(*ttm);

   196

   197

			r = TerraformGetHeightOfTile(ts, tile);

   198

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

   199

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

   200

					return false;

   201

			}

   202

		}

   203

	}

   204

   205

	return true;

   206

}

   207

   208

/** Terraform land

   209

 * @param x,y coordinates to terraform

   210

 * @param p1 corners to terraform.

   211

 * @param p2 direction; eg up or down

   212

 */

   213

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

   214

{

   215

	TerraformerState ts;

   216

	TileIndex tile;

   217

	int direction;

   218

   219

	TerraformerHeightMod modheight_data[576];

   220

	TileIndex tile_table_data[625];

   221

   222

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   223

   224

	_error_message = INVALID_STRING_ID;

   225

	_terraform_err_tile = 0;

   226

   227

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

   228

	ts.flags = flags;

   229

	ts.modheight_count = ts.tile_table_count = 0;

   230

	ts.cost = 0;

   231

	ts.modheight = modheight_data;

   232

	ts.tile_table = tile_table_data;

   233

   234

	tile = TileVirtXY(x, y);

   235

   236

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

   237

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

   238

   239

	if (p1 & 1) {

   240

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

   241

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

   242

					return CMD_ERROR;

   243

	}

   244

   245

	if (p1 & 2) {

   246

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

   247

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

   248

					return CMD_ERROR;

   249

	}

   250

   251

	if (p1 & 4) {

   252

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

   253

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

   254

					return CMD_ERROR;

   255

	}

   256

   257

	if (p1 & 8) {

   258

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

   259

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

   260

					return CMD_ERROR;

   261

	}

   262

   263

	if (direction == -1) {

   264

		/* Check if tunnel would take damage */

   265

		int count;

   266

		TileIndex *ti = ts.tile_table;

   267

   268

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

   269

			uint z, t;

   270

			TileIndex tile = *ti;

   271

   272

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

   273

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

   274

			if (t <= z) z = t;

   275

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

   276

			if (t <= z) z = t;

   277

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

   278

			if (t <= z) z = t;

   279

   280

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

   281

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   282

		}

   283

	}

   284

   285

	if (flags & DC_EXEC) {

   286

		/* Clear the landscape at the tiles */

   287

		{

   288

			int count;

   289

			TileIndex *ti = ts.tile_table;

   290

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

   291

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

   292

			}

   293

		}

   294

   295

		/* change the height */

   296

		{

   297

			int count;

   298

			TerraformerHeightMod *mod;

   299

   300

			mod = ts.modheight;

   301

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

   302

				TileIndex til = mod->tile;

   303

   304

				SetTileHeight(til, mod->height);

   305

				TerraformAddDirtyTileAround(&ts, til);

   306

			}

   307

		}

   308

   309

		/* finally mark the dirty tiles dirty */

   310

		{

   311

			int count;

   312

			TileIndex *ti = ts.tile_table;

   313

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

   314

				MarkTileDirtyByTile(*ti);

   315

			}

   316

		}

   317

	}

   318

	return ts.cost;

   319

}

   320

   321

   322

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

   323

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

   324

 * @param p1 start tile of area drag

   325

 * @param p2 unused

   326

 */

   327

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

   328

{

   329

	int size_x, size_y;

   330

	int sx, sy;

   331

	uint h, curh;

   332

	TileIndex tile;

   333

	int32 ret, cost, money;

   334

   335

	if (p1 > MapSize()) return CMD_ERROR;

   336

   337

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   338

   339

	// remember level height

   340

	h = TileHeight(p1);

   341

   342

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

   343

   344

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

   345

	sx = TileX(p1);

   346

	sy = TileY(p1);

   347

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

   348

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

   349

	tile = TileXY(sx, sy);

   350

   351

	size_x = ex-sx+1;

   352

	size_y = ey-sy+1;

   353

   354

	money = GetAvailableMoneyForCommand();

   355

	cost = 0;

   356

   357

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   358

		curh = TileHeight(tile2);

   359

		while (curh != h) {

   360

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

   361

			if (CmdFailed(ret)) break;

   362

			cost += ret;

   363

   364

			if (flags & DC_EXEC) {

   365

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

   366

					_additional_cash_required = ret;

   367

					return cost - ret;

   368

				}

   369

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

   370

			}

   371

   372

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

   373

		}

   374

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   375

   376

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

   377

}

   378

   379

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

   380

 * the name is a bit confusing ;p

   381

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

   382

 * @param p1 unused

   383

 * @param p2 unused

   384

 */

   385

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

   386

{

   387

	TileIndex tile;

   388

	int32 cost;

   389

   390

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   391

   392

	tile = TileVirtXY(x, y);

   393

   394

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   395

   396

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

   397

			IsTileOwner(tile, _current_player))

   398

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   399

   400

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

   401

	if (CmdFailed(cost)) return CMD_ERROR;

   402

   403

	if (flags & DC_EXEC) {

   404

		ModifyTile(tile,

   405

			MP_SETTYPE(MP_UNMOVABLE) | MP_MAPOWNER_CURRENT | MP_MAP5,

   406

			3 /* map5 */

   407

			);

   408

	}

   409

   410

	return cost + _price.purchase_land * 10;

   411

}

   412

   413

   414

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   415

{

   416

	static const int32 * _clear_price_table[] = {

   417

			NULL,

   418

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

   419

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

   420

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

   421

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

   422

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

   423

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

   424

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

   425

	};

   426

	const int32 *price = _clear_price_table[_m[tile].m5 & 0x1F];

   427

   428

	if (flags & DC_EXEC)

   429

		DoClearSquare(tile);

   430

   431

	if (price == NULL)

   432

		return 0;

   433

	return *price;

   434

}

   435

   436

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

   437

 * the name is a bit confusing ;p

   438

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

   439

 * @param p1 unused

   440

 * @param p2 unused

   441

 */

   442

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

   443

{

   444

	TileIndex tile;

   445

   446

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   447

   448

	tile = TileVirtXY(x, y);

   449

   450

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

   451

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

   452

   453

   454

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   455

   456

	if (flags & DC_EXEC)

   457

		DoClearSquare(tile);

   458

   459

	return - _price.purchase_land * 2;

   460

}

   461

   462

   463

#include "table/clear_land.h"

   464

   465

   466

void DrawClearLandTile(TileInfo *ti, byte set)

   467

{

   468

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

   469

}

   470

   471

void DrawHillyLandTile(TileInfo *ti)

   472

{

   473

	if (ti->tileh != 0) {

   474

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

   475

	} else {

   476

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

   477

	}

   478

}

   479

   480

void DrawClearLandFence(TileInfo *ti, byte img)

   481

{

   482

	byte z = ti->z;

   483

   484

	if (ti->tileh & 2) {

   485

		z += 8;

   486

		if (ti->tileh == 0x17)

   487

			z += 8;

   488

	}

   489

   490

	if (img & 0x38) {

   491

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

   492

	}

   493

   494

	if (img & 0x7) {

   495

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[GB(img, 0, 3) - 1] + _fence_mod_by_tileh_2[ti->tileh], ti->x, ti->y, z);

   496

	}

   497

}

   498

   499

static void DrawTile_Clear(TileInfo *ti)

   500

{

   501

   502

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

   503

	case 0:

   504

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

   505

		break;

   506

   507

	case 1:

   508

		DrawHillyLandTile(ti);

   509

		break;

   510