1

/* $Id$ */

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     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear_map.h"

     6

#include "table/strings.h"

     7

#include "functions.h"

     8

#include "map.h"

     9

#include "player.h"

    10

#include "tile.h"

    11

#include "viewport.h"

    12

#include "command.h"

    13

#include "tunnel_map.h"

    14

#include "variables.h"

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#include "table/sprites.h"

    16

#include "unmovable_map.h"

    17

    18

typedef struct TerraformerHeightMod {

    19

	TileIndex tile;

    20

	byte height;

    21

} TerraformerHeightMod;

    22

    23

typedef struct TerraformerState {

    24

	int height[4];

    25

	uint32 flags;

    26

    27

	int direction;

    28

	int modheight_count;

    29

	int tile_table_count;

    30

    31

	int32 cost;

    32

    33

	TileIndex *tile_table;

    34

	TerraformerHeightMod *modheight;

    35

    36

} TerraformerState;

    37

    38

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    39

{

    40

	TileIndex *t;

    41

	int count;

    42

    43

	if (TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) return -1;

    44

    45

	t = ts->tile_table;

    46

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

    47

		if (*t == tile) return 0;

    48

	}

    49

    50

	return 1;

    51

}

    52

    53

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    54

{

    55

	TerraformerHeightMod *mod = ts->modheight;

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	int count;

    57

    58

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

    59

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

    73

    74

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

    75

		if (*t == tile) return;

    76

	}

    77

    78

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

    79

}

    80

    81

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    82

{

    83

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

    84

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

    85

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

    86

	TerraformAddDirtyTile(ts, tile);

    87

}

    88

    89

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

    90

{

    91

	int r;

    92

    93

	assert(tile < MapSize());

    94

    95

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

    96

		return r;

    97

    98

	if (!IsTileType(tile, MP_RAILWAY)) {

    99

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

   100

   101

		if (CmdFailed(ret)) {

   102

			_terraform_err_tile = tile;

   103

			return -1;

   104

		}

   105

   106

		ts->cost += ret;

   107

	}

   108

   109

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

   110

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

   111

   112

	return 0;

   113

}

   114

   115

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

   116

{

   117

	int nh;

   118

	TerraformerHeightMod *mod;

   119

	int count;

   120

   121

	assert(tile < MapSize());

   122

   123

	if (height < 0) {

   124

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   125

		return false;

   126

	}

   127

   128

	_error_message = STR_1004_TOO_HIGH;

   129

   130

	if (height > 15) return false;

   131

   132

	nh = TerraformGetHeightOfTile(ts, tile);

   133

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

   134

   135

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

   136

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

   137

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

   138

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

   139

   140

	mod = ts->modheight;

   141

	count = ts->modheight_count;

   142

   143

	for (;;) {

   144

		if (count == 0) {

   145

			if (ts->modheight_count >= 576)

   146

				return false;

   147

			ts->modheight_count++;

   148

			break;

   149

		}

   150

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

   151

		mod++;

   152

		count--;

   153

	}

   154

   155

	mod->tile = tile;

   156

	mod->height = (byte)height;

   157

   158

	ts->cost += _price.terraform;

   159

   160

	{

   161

		int direction = ts->direction, r;

   162

		const TileIndexDiffC *ttm;

   163

   164

		static const TileIndexDiffC _terraform_tilepos[] = {

   165

			{ 1,  0},

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			{-2,  0},

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			{ 1,  1},

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			{ 0, -2}

   169

		};

   170

   171

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

   172

			tile += ToTileIndexDiff(*ttm);

   173

   174

			r = TerraformGetHeightOfTile(ts, tile);

   175

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

   176

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

   177

					return false;

   178

			}

   179

		}

   180

	}

   181

   182

	return true;

   183

}

   184

   185

/** Terraform land

   186

 * @param tile tile to terraform

   187

 * @param p1 corners to terraform.

   188

 * @param p2 direction; eg up or down

   189

 */

   190

int32 CmdTerraformLand(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   191

{

   192

	TerraformerState ts;

   193

	int direction;

   194

   195

	TerraformerHeightMod modheight_data[576];

   196

	TileIndex tile_table_data[625];

   197

   198

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   199

   200

	_error_message = INVALID_STRING_ID;

   201

	_terraform_err_tile = 0;

   202

   203

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

   204

	ts.flags = flags;

   205

	ts.modheight_count = ts.tile_table_count = 0;

   206

	ts.cost = 0;

   207

	ts.modheight = modheight_data;

   208

	ts.tile_table = tile_table_data;

   209

   210

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

   211

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

   212

   213

	if (p1 & 1) {

   214

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

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

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					return CMD_ERROR;

   217

	}

   218

   219

	if (p1 & 2) {

   220

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

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

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					return CMD_ERROR;

   223

	}

   224

   225

	if (p1 & 4) {

   226

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

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

   228

					return CMD_ERROR;

   229

	}

   230

   231

	if (p1 & 8) {

   232

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

   233

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

   234

					return CMD_ERROR;

   235

	}

   236

   237

	{ /* Check if tunnel or track would take damage */

   238

		int count;

   239

		TileIndex *ti = ts.tile_table;

   240

   241

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

   242

			uint a, b, c, d, r, min;

   243

			TileIndex tile = *ti;

   244

   245

			_terraform_err_tile = tile;

   246

   247

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

   248

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

   249

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

   250

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

   251

   252

			r = GetTileh(a, b, c, d, &min);

   253

   254

			if (IsTileType(tile, MP_RAILWAY)) {

   255

				if (IsSteepTileh(r)) return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   256

   257

				if (IsPlainRailTile(tile)) {

   258

					extern const TrackBits _valid_tileh_slopes[2][15];

   259

					if (GetTrackBits(tile) & ~_valid_tileh_slopes[0][r]) return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   260

				} else return_cmd_error(STR_5800_OBJECT_IN_THE_WAY);

   261

			}

   262

   263

			if (direction == -1 && IsTunnelInWay(tile, min)) return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   264

   265

			_terraform_err_tile = 0;

   266

		}

   267

	}

   268

   269

	if (flags & DC_EXEC) {

   270

		/* Clear the landscape at the tiles */

   271

		{

   272

			int count;

   273

			TileIndex *ti = ts.tile_table;

   274

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

   275

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

   276

			}

   277

		}

   278

   279

		/* change the height */

   280

		{

   281

			int count;

   282

			TerraformerHeightMod *mod;

   283

   284

			mod = ts.modheight;

   285

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

   286

				TileIndex til = mod->tile;

   287

   288

				SetTileHeight(til, mod->height);

   289

				TerraformAddDirtyTileAround(&ts, til);

   290

			}

   291

		}

   292

   293

		/* finally mark the dirty tiles dirty */

   294

		{

   295

			int count;

   296

			TileIndex *ti = ts.tile_table;

   297

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

   298

				MarkTileDirtyByTile(*ti);

   299

			}

   300

		}

   301

	}

   302

	return ts.cost;

   303

}

   304

   305

   306

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

   307

 * @param tile end tile of area-drag

   308

 * @param p1 start tile of area drag

   309

 * @param p2 unused

   310

 */

   311

int32 CmdLevelLand(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   312

{

   313

	int size_x, size_y;

   314

	int ex;

   315

	int ey;

   316

	int sx, sy;

   317

	uint h, curh;

   318

	int32 ret, cost, money;

   319

   320

	if (p1 >= MapSize()) return CMD_ERROR;

   321

   322

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   323

   324

	// remember level height

   325

	h = TileHeight(p1);

   326

   327

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

   328

	ex = TileX(tile);

   329

	ey = TileY(tile);

   330

	sx = TileX(p1);

   331

	sy = TileY(p1);

   332

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

   333

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

   334

	tile = TileXY(sx, sy);

   335

   336

	size_x = ex-sx+1;

   337

	size_y = ey-sy+1;

   338

   339

	money = GetAvailableMoneyForCommand();

   340

	cost = 0;

   341

   342

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   343

		curh = TileHeight(tile2);

   344

		while (curh != h) {

   345

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

   346

			if (CmdFailed(ret)) break;

   347

			cost += ret;

   348

   349

			if (flags & DC_EXEC) {

   350

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

   351

					_additional_cash_required = ret;

   352

					return cost - ret;

   353

				}

   354

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

   355

			}

   356

   357

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

   358

		}

   359

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   360

   361

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

   362

}

   363

   364

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

   365

 * the name is a bit confusing ;p

   366

 * @param tile the tile the player is purchasing

   367

 * @param p1 unused

   368

 * @param p2 unused

   369

 */

   370

int32 CmdPurchaseLandArea(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   371

{

   372

	int32 cost;

   373

   374

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   375

   376

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   377

   378

	if (IsOwnedLandTile(tile) && IsTileOwner(tile, _current_player)) {

   379

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   380

	}

   381

   382

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

   383

	if (CmdFailed(cost)) return CMD_ERROR;

   384

   385

	if (flags & DC_EXEC) {

   386

		MakeOwnedLand(tile, _current_player);

   387

		MarkTileDirtyByTile(tile);

   388

	}

   389

   390

	return cost + _price.purchase_land * 10;

   391

}

   392

   393

   394

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   395

{

   396

	static const int32* clear_price_table[] = {

   397

		&_price.clear_1,

   398

		&_price.purchase_land,

   399

		&_price.clear_2,

   400

		&_price.clear_3,

   401

		&_price.purchase_land,

   402

		&_price.purchase_land,

   403

		&_price.clear_2, // XXX unused?

   404

	};

   405

	int32 price;

   406

   407

	if (IsClearGround(tile, CLEAR_GRASS) && GetClearDensity(tile) == 0) {

   408

		price = 0;

   409

	} else {

   410

		price = *clear_price_table[GetClearGround(tile)];

   411

	}

   412

   413

	if (flags & DC_EXEC) DoClearSquare(tile);

   414

   415

	return price;

   416

}

   417

   418

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

   419

 * the name is a bit confusing ;p

   420

 * @param tile the tile the player is selling

   421

 * @param p1 unused

   422

 * @param p2 unused

   423

 */

   424

int32 CmdSellLandArea(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   425

{

   426

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   427

   428

	if (!IsOwnedLandTile(tile)) return CMD_ERROR;

   429

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

   430

   431

   432

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   433

   434

	if (flags & DC_EXEC)

   435

		DoClearSquare(tile);

   436

   437

	return - _price.purchase_land * 2;

   438

}

   439

   440

   441

#include "table/clear_land.h"

   442

   443

   444

void DrawClearLandTile(const TileInfo *ti, byte set)

   445

{

   446

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

   447

}

   448

   449

void DrawHillyLandTile(const TileInfo *ti)

   450

{

   451

	if (ti->tileh != 0) {

   452

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

   453

	} else {

   454

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

   455

	}

   456

}

   457

   458

void DrawClearLandFence(const TileInfo *ti)

   459

{

   460

	byte z = ti->z;

   461

   462

	if (ti->tileh & 2) {

   463

		z += 8;

   464

		if (ti->tileh == 0x17) z += 8;

   465

	}

   466

   467

	if (GetFenceSW(ti->tile) != 0) {

   468

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[GetFenceSW(ti->tile) - 1] + _fence_mod_by_tileh[ti->tileh], ti->x, ti->y, z);

   469

	}

   470

   471

	if (GetFenceSE(ti->tile) != 0) {

   472

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[GetFenceSE(ti->tile) - 1] + _fence_mod_by_tileh_2[ti->tileh], ti->x, ti->y, z);

   473

	}

   474

}

   475

   476

static void DrawTile_Clear(TileInfo *ti)

   477

{

   478

	switch (GetClearGround(ti->tile)) {

   479

		case CLEAR_GRASS:

   480

			DrawClearLandTile(ti, GetClearDensity(ti->tile));

   481

			break;

   482

   483

		case CLEAR_ROUGH:

   484

			DrawHillyLandTile(ti);

   485

			break;

   486

   487

		case CLEAR_ROCKS:

   488

			DrawGroundSprite(SPR_FLAT_ROCKY_LAND_1 + _tileh_to_sprite[ti->tileh]);

   489

			break;

   490

   491

		case CLEAR_FIELDS:

   492

			DrawGroundSprite(_clear_land_sprites_1[GetFieldType(ti->tile)] + _tileh_to_sprite[ti->tileh]);

   493

			break;

   494

   495

		case CLEAR_SNOW:

   496

			DrawGroundSprite(_clear_land_sprites_2[GetClearDensity(ti->tile)] + _tileh_to_sprite[ti->tileh]);

   497

			break;

   498

   499

		case CLEAR_DESERT:

   500