1

/* $Id$ */

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     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

#include "table/sprites.h"

    14

    15

typedef struct TerraformerHeightMod {

    16

	TileIndex tile;

    17

	byte height;

    18

} TerraformerHeightMod;

    19

    20

typedef struct TerraformerState {

    21

	int height[4];

    22

	uint32 flags;

    23

    24

	int direction;

    25

	int modheight_count;

    26

	int tile_table_count;

    27

    28

	int32 cost;

    29

    30

	TileIndex *tile_table;

    31

	TerraformerHeightMod *modheight;

    32

    33

} TerraformerState;

    34

    35

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    36

{

    37

	TileIndex *t;

    38

	int count;

    39

    40

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

    41

		return -1;

    42

    43

	t = ts->tile_table;

    44

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

    45

		if (*t == tile)

    46

			return 0;

    47

	}

    48

    49

	return 1;

    50

}

    51

    52

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    53

{

    54

	TerraformerHeightMod *mod = ts->modheight;

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	int count;

    56

    57

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

    58

		if (mod->tile == tile)

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			return mod->height;

    60

	}

    61

    62

	return TileHeight(tile);

    63

}

    64

    65

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    66

{

    67

	int count;

    68

	TileIndex *t;

    69

    70

	count = ts->tile_table_count;

    71

    72

	if (count >= 625)

    73

		return;

    74

    75

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

    76

		if (*t == tile)

    77

			return;

    78

	}

    79

    80

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

    81

}

    82

    83

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    84

{

    85

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

    86

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

    87

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

    88

	TerraformAddDirtyTile(ts, tile);

    89

}

    90

    91

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

    92

{

    93

	int r;

    94

	int32 ret;

    95

    96

	assert(tile < MapSize());

    97

    98

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

    99

		return r;

   100

   101

	if (IsTileType(tile, MP_RAILWAY)) {

   102

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

   103

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

   104

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

   105

   106

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

   107

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

   108

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

   109

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

   110

		if (tileh == _railway_dangslopes[mode] ||

   111

				tileh == _railway_dangslopes2[mode]) {

   112

			_terraform_err_tile = tile;

   113

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   114

			return -1;

   115

		}

   116

   117

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

   118

		// tile can be terraformed.

   119

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

   120

			return 0;

   121

	}

   122

   123

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

   124

   125

	if (ret == CMD_ERROR) {

   126

		_terraform_err_tile = tile;

   127

		return -1;

   128

	}

   129

   130

	ts->cost += ret;

   131

   132

	if (ts->tile_table_count >= 625)

   133

		return -1;

   134

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

   135

   136

	return 0;

   137

}

   138

   139

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

   140

{

   141

	int nh;

   142

	TerraformerHeightMod *mod;

   143

	int count;

   144

   145

	assert(tile < MapSize());

   146

   147

	if (height < 0) {

   148

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   149

		return false;

   150

	}

   151

   152

	_error_message = STR_1004_TOO_HIGH;

   153

   154

	if (height > 0xF)

   155

		return false;

   156

   157

	nh = TerraformGetHeightOfTile(ts, tile);

   158

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

   159

		return false;

   160

   161

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

   162

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

   163

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

   164

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

   165

   166

	mod = ts->modheight;

   167

	count = ts->modheight_count;

   168

   169

	for(;;) {

   170

		if (count == 0) {

   171

			if (ts->modheight_count >= 576)

   172

				return false;

   173

			ts->modheight_count++;

   174

			break;

   175

		}

   176

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

   177

		mod++;

   178

		count--;

   179

	}

   180

   181

	mod->tile = tile;

   182

	mod->height = (byte)height;

   183

   184

	ts->cost += _price.terraform;

   185

   186

	{

   187

		int direction = ts->direction, r;

   188

		const TileIndexDiffC *ttm;

   189

   190

		static const TileIndexDiffC _terraform_tilepos[] = {

   191

			{ 1,  0},

   192

			{-2,  0},

   193

			{ 1,  1},

   194

			{ 0, -2}

   195

		};

   196

   197

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

   198

			tile += ToTileIndexDiff(*ttm);

   199

   200

			r = TerraformGetHeightOfTile(ts, tile);

   201

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

   202

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

   203

					return false;

   204

			}

   205

		}

   206

	}

   207

   208

	return true;

   209

}

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   211

/** Terraform land

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 * @param x,y coordinates to terraform

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 * @param p1 corners to terraform.

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 * @param p2 direction; eg up or down

   215

 */

   216

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

   217

{

   218

	TerraformerState ts;

   219

	TileIndex tile;

   220

	int direction;

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   222

	TerraformerHeightMod modheight_data[576];

   223

	TileIndex tile_table_data[625];

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   225

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   226

   227

	_error_message = INVALID_STRING_ID;

   228

	_terraform_err_tile = 0;

   229

   230

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

   231

	ts.flags = flags;

   232

	ts.modheight_count = ts.tile_table_count = 0;

   233

	ts.cost = 0;

   234

	ts.modheight = modheight_data;

   235

	ts.tile_table = tile_table_data;

   236

   237

	tile = TileVirtXY(x, y);

   238

   239

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

   240

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

   241

   242

	if (p1 & 1) {

   243

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

   244

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

   245

					return CMD_ERROR;

   246

	}

   247

   248

	if (p1 & 2) {

   249

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

   250

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

   251

					return CMD_ERROR;

   252

	}

   253

   254

	if (p1 & 4) {

   255

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

   256

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

   257

					return CMD_ERROR;

   258

	}

   259

   260

	if (p1 & 8) {

   261

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

   262

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

   263

					return CMD_ERROR;

   264

	}

   265

   266

	if (direction == -1) {

   267

		/* Check if tunnel would take damage */

   268

		int count;

   269

		TileIndex *ti = ts.tile_table;

   270

   271

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

   272

			uint z, t;

   273

			TileIndex tile = *ti;

   274

   275

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

   276

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

   277

			if (t <= z) z = t;

   278

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

   279

			if (t <= z) z = t;

   280

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

   281

			if (t <= z) z = t;

   282

   283

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

   284

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   285

		}

   286

	}

   287

   288

	if (flags & DC_EXEC) {

   289

		/* Clear the landscape at the tiles */

   290

		{

   291

			int count;

   292

			TileIndex *ti = ts.tile_table;

   293

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

   294

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

   295

			}

   296

		}

   297

   298

		/* change the height */

   299

		{

   300

			int count;

   301

			TerraformerHeightMod *mod;

   302

   303

			mod = ts.modheight;

   304

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

   305

				TileIndex til = mod->tile;

   306

   307

				SetTileHeight(til, mod->height);

   308

				TerraformAddDirtyTileAround(&ts, til);

   309

			}

   310

		}

   311

   312

		/* finally mark the dirty tiles dirty */

   313

		{

   314

			int count;

   315

			TileIndex *ti = ts.tile_table;

   316

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

   317

				MarkTileDirtyByTile(*ti);

   318

			}

   319

		}

   320

	}

   321

	return ts.cost;

   322

}

   323

   324

   325

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

   326

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

   327

 * @param p1 start tile of area drag

   328

 * @param p2 unused

   329

 */

   330

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

   331

{

   332

	int size_x, size_y;

   333

	int sx, sy;

   334

	uint h, curh;

   335

	TileIndex tile;

   336

	int32 ret, cost, money;

   337

   338

	if (p1 > MapSize()) return CMD_ERROR;

   339

   340

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   341

   342

	// remember level height

   343

	h = TileHeight(p1);

   344

   345

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

   346

   347

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

   348

	sx = TileX(p1);

   349

	sy = TileY(p1);

   350

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

   351

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

   352

	tile = TileXY(sx, sy);

   353

   354

	size_x = ex-sx+1;

   355

	size_y = ey-sy+1;

   356

   357

	money = GetAvailableMoneyForCommand();

   358

	cost = 0;

   359

   360

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   361

		curh = TileHeight(tile2);

   362

		while (curh != h) {

   363

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

   364

			if (CmdFailed(ret)) break;

   365

			cost += ret;

   366

   367

			if (flags & DC_EXEC) {

   368

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

   369

					_additional_cash_required = ret;

   370

					return cost - ret;

   371

				}

   372

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

   373

			}

   374

   375

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

   376

		}

   377

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   378

   379

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

   380

}

   381

   382

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

   383

 * the name is a bit confusing ;p

   384

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

   385

 * @param p1 unused

   386

 * @param p2 unused

   387

 */

   388

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

   389

{

   390

	TileIndex tile;

   391

	int32 cost;

   392

   393

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   394

   395

	tile = TileVirtXY(x, y);

   396

   397

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   398

   399

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

   400

			IsTileOwner(tile, _current_player))

   401

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   402

   403

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

   404

	if (CmdFailed(cost)) return CMD_ERROR;

   405

   406

	if (flags & DC_EXEC) {

   407

		ModifyTile(tile,

   408

			MP_SETTYPE(MP_UNMOVABLE) | MP_MAPOWNER_CURRENT | MP_MAP5,

   409

			3 /* map5 */

   410

			);

   411

	}

   412

   413

	return cost + _price.purchase_land * 10;

   414

}

   415

   416

   417

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   418

{

   419

	static const int32 null = 0;

   420

	static const int32* clear_price_table[] = {

   421

		&null,

   422

		&_price.clear_1,

   423

		&_price.clear_1,

   424

		&_price.clear_1,

   425

		&_price.purchase_land,

   426

		&_price.purchase_land,

   427

		&_price.purchase_land,

   428

		&_price.purchase_land,

   429

		&_price.clear_2,

   430

		&_price.clear_2,

   431

		&_price.clear_2,

   432

		&_price.clear_2,

   433

		&_price.clear_3,

   434

		&_price.clear_3,

   435

		&_price.clear_3,

   436

		&_price.clear_3,

   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.purchase_land,

   445

		&_price.clear_2,

   446

		&_price.clear_2,

   447

		&_price.clear_2,

   448

		&_price.clear_2,

   449

	};

   450

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

   451

   452

	if (flags & DC_EXEC) DoClearSquare(tile);

   453

   454

	return *price;

   455

}

   456

   457

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

   458

 * the name is a bit confusing ;p

   459

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

   460

 * @param p1 unused

   461

 * @param p2 unused

   462

 */

   463

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

   464

{

   465

	TileIndex tile;

   466

   467

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   468

   469

	tile = TileVirtXY(x, y);

   470

   471

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

   472

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

   473

   474

   475

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   476

   477

	if (flags & DC_EXEC)

   478

		DoClearSquare(tile);

   479

   480

	return - _price.purchase_land * 2;

   481

}

   482

   483

   484

#include "table/clear_land.h"

   485

   486

   487

void DrawClearLandTile(const TileInfo *ti, byte set)

   488

{

   489

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

   490

}

   491

   492

void DrawHillyLandTile(const TileInfo *ti)

   493

{

   494

	if (ti->tileh != 0) {

   495

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

   496

	} else {

   497

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

   498

	}

   499

}

   500

   501

void DrawClearLandFence(const TileInfo *ti)

   502

{

   503

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

   504

	byte z = ti->z;

   505

   506

	if (ti->tileh & 2) {