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"

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#include "tile.h"

    10

#include "viewport.h"

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#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()) return -1;

    41

    42

	t = ts->tile_table;

    43

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

    44

		if (*t == tile) return 0;

    45

	}

    46

    47

	return 1;

    48

}

    49

    50

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    51

{

    52

	TerraformerHeightMod *mod = ts->modheight;

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	int count;

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    55

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

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		if (mod->tile == tile) return mod->height;

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	}

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    59

	return TileHeight(tile);

    60

}

    61

    62

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    63

{

    64

	int count;

    65

	TileIndex *t;

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    67

	count = ts->tile_table_count;

    68

    69

	if (count >= 625) return;

    70

    71

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

    72

		if (*t == tile) return;

    73

	}

    74

    75

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

    76

}

    77

    78

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    79

{

    80

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

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

    82

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

    83

	TerraformAddDirtyTile(ts, tile);

    84

}

    85

    86

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

    87

{

    88

	int r;

    89

	bool skip_clear = false;

    90

    91

	assert(tile < MapSize());

    92

    93

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

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		return r;

    95

    96

	if (IsTileType(tile, MP_RAILWAY)) {

    97

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

    98

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

    99

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

   100

   101

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

   102

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

   103

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

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

   105

		if (tileh == _railway_dangslopes[mode] ||

   106

				tileh == _railway_dangslopes2[mode]) {

   107

			_terraform_err_tile = tile;

   108

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   109

			return -1;

   110

		}

   111

   112

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

   113

		// tile can be terraformed.

   118

	}

   119

   120

	if (!skip_clear) {

   121

		int32 ret = DoCommandByTile(tile, 0,0, ts->flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR);

   122

   123

		if (CmdFailed(ret)) {

   124

			_terraform_err_tile = tile;

   125

			return -1;

   126

		}

   127

   128

		ts->cost += ret;

   129

	}

   130

   131

	if (ts->tile_table_count >= 625) return -1;

   132

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

   133

   134

	return 0;

   135

}

   136

   137

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

   138

{

   139

	int nh;

   140

	TerraformerHeightMod *mod;

   141

	int count;

   142

   143

	assert(tile < MapSize());

   144

   145

	if (height < 0) {

   146

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   147

		return false;

   148

	}

   149

   150

	_error_message = STR_1004_TOO_HIGH;

   151

   152

	if (height > 15) return false;

   153

   154

	nh = TerraformGetHeightOfTile(ts, tile);

   155

	if (nh < 0 || height == nh) return false;

   156

   157

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

   158

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

   159

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

   160

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

   161

   162

	mod = ts->modheight;

   163

	count = ts->modheight_count;

   164

   165

	for (;;) {

   166

		if (count == 0) {

   167

			if (ts->modheight_count >= 576)

   168

				return false;

   169

			ts->modheight_count++;

   170

			break;

   171

		}

   172

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

   173

		mod++;

   174

		count--;

   175

	}

   176

   177

	mod->tile = tile;

   178

	mod->height = (byte)height;

   179

   180

	ts->cost += _price.terraform;

   181

   182

	{

   183

		int direction = ts->direction, r;

   184

		const TileIndexDiffC *ttm;

   185

   186

		static const TileIndexDiffC _terraform_tilepos[] = {

   187

			{ 1,  0},

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			{-2,  0},

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			{ 1,  1},

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			{ 0, -2}

   191

		};

   192

   193

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

   194

			tile += ToTileIndexDiff(*ttm);

   195

   196

			r = TerraformGetHeightOfTile(ts, tile);

   197

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

   198

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

   199

					return false;

   200

			}

   201

		}

   202

	}

   203

   204

	return true;

   205

}

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   207

/** Terraform land

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 * @param x,y coordinates to terraform

   209

 * @param p1 corners to terraform.

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 * @param p2 direction; eg up or down

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 */

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

   213

{

   214

	TerraformerState ts;

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	TileIndex tile;

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	int direction;

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   218

	TerraformerHeightMod modheight_data[576];

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	TileIndex tile_table_data[625];

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   221

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

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   223

	_error_message = INVALID_STRING_ID;

   224

	_terraform_err_tile = 0;

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   226

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

   227

	ts.flags = flags;

   228

	ts.modheight_count = ts.tile_table_count = 0;

   229

	ts.cost = 0;

   230

	ts.modheight = modheight_data;

   231

	ts.tile_table = tile_table_data;

   232

   233

	tile = TileVirtXY(x, y);

   234

   235

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

   236

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

   237

   238

	if (p1 & 1) {

   239

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

   240

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

   241

					return CMD_ERROR;

   242

	}

   243

   244

	if (p1 & 2) {

   245

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

   246

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

   247

					return CMD_ERROR;

   248

	}

   249

   250

	if (p1 & 4) {

   251

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

   252

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

   253

					return CMD_ERROR;

   254

	}

   255

   256

	if (p1 & 8) {

   257

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

   258

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

   259

					return CMD_ERROR;

   260

	}

   261

   262

	if (direction == -1) {

   263

		/* Check if tunnel would take damage */

   264

		int count;

   265

		TileIndex *ti = ts.tile_table;

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   267

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

   268

			uint z, t;

   269

			TileIndex tile = *ti;

   270

   271

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

   272

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

   273

			if (t <= z) z = t;

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

   275

			if (t <= z) z = t;

   276

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

   277

			if (t <= z) z = t;

   278

   279

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

   280

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   281

			}

   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 null = 0;

   417

	static const int32* clear_price_table[] = {

   418

		&null,

   419

		&_price.clear_1,

   420

		&_price.clear_1,

   421

		&_price.clear_1,

   422

		&_price.purchase_land,

   423

		&_price.purchase_land,

   424

		&_price.purchase_land,

   425

		&_price.purchase_land,

   426

		&_price.clear_2,

   427

		&_price.clear_2,

   428

		&_price.clear_2,

   429

		&_price.clear_2,

   430

		&_price.clear_3,

   431

		&_price.clear_3,

   432

		&_price.clear_3,

   433

		&_price.clear_3,

   434

		&_price.purchase_land,

   435

		&_price.purchase_land,

   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.clear_2,

   443

		&_price.clear_2,

   444

		&_price.clear_2,

   445

		&_price.clear_2,

   446

	};

   447

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

   448

   449

	if (flags & DC_EXEC) DoClearSquare(tile);

   450

   451

	return *price;

   452

}

   453

   454

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

   455

 * the name is a bit confusing ;p

   456

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

   457

 * @param p1 unused

   458

 * @param p2 unused

   459

 */

   460

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

   461

{

   462

	TileIndex tile;

   463

   464

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   465

   466

	tile = TileVirtXY(x, y);

   467

   468

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

   469

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

   470

   471

   472

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   473

   474

	if (flags & DC_EXEC)

   475

		DoClearSquare(tile);

   476

   477

	return - _price.purchase_land * 2;

   478

}

   479

   480

   481

#include "table/clear_land.h"

   482

   483

   484

void DrawClearLandTile(const TileInfo *ti, byte set)

   485

{

   486

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

   487

}

   488

   489

void DrawHillyLandTile(const TileInfo *ti)

   490

{

   491

	if (ti->tileh != 0) {

   492

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

   493

	} else {

   494

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

   495

	}

   496

}

   497

   498

void DrawClearLandFence(const TileInfo *ti)

   499

{

   500

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

   501

	byte z = ti->z;

   502

   503

	if (ti->tileh & 2) {