1

/* $Id$ */

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#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear_map.h"

     6

#include "rail_map.h"

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#include "table/strings.h"

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#include "functions.h"

     9

#include "map.h"

    10

#include "player.h"

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#include "tile.h"

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#include "viewport.h"

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#include "command.h"

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#include "tunnel_map.h"

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#include "variables.h"

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#include "table/sprites.h"

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#include "unmovable_map.h"

    18

    19

typedef struct TerraformerHeightMod {

    20

	TileIndex tile;

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	byte height;

    22

} TerraformerHeightMod;

    23

    24

typedef struct TerraformerState {

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	int height[4];

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	uint32 flags;

    27

    28

	int direction;

    29

	int modheight_count;

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	int tile_table_count;

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    32

	int32 cost;

    33

    34

	TileIndex *tile_table;

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	TerraformerHeightMod *modheight;

    36

    37

} TerraformerState;

    38

    39

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    40

{

    41

	TileIndex *t;

    42

	int count;

    43

    44

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

    45

    46

	t = ts->tile_table;

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

    48

		if (*t == tile) return 0;

    49

	}

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    51

	return 1;

    52

}

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    54

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

    55

{

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	TerraformerHeightMod *mod = ts->modheight;

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	int count;

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    59

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

    60

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

    61

	}

    62

    63

	return TileHeight(tile);

    64

}

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    66

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    67

{

    68

	int count;

    69

	TileIndex *t;

    70

    71

	count = ts->tile_table_count;

    72

    73

	if (count >= 625) return;

    74

    75

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

    76

		if (*t == tile) return;

    77

	}

    78

    79

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

    80

}

    81

    82

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    83

{

    84

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

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

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

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	TerraformAddDirtyTile(ts, tile);

    88

}

    89

    90

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

    91

{

    92

	int r;

    93

	int32 ret;

    94

    95

	assert(tile < MapSize());

    96

    97

	r = TerraformAllowTileProcess(ts, tile);

    98

	if (r <= 0) return r;

    99

   100

	if (IsTileType(tile, MP_RAILWAY)) {

   101

		static const TrackBits safe_track[] = { TRACK_BIT_LOWER, TRACK_BIT_LEFT, TRACK_BIT_UPPER, TRACK_BIT_RIGHT };

   102

		static const Slope unsafe_slope[] = { SLOPE_S, SLOPE_W, SLOPE_N, SLOPE_E };

   103

   104

		Slope tileh;

   105

		uint z;

   106

   107

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

   108

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

   109

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

   110

		tileh = GetTileSlope(tile, &z);

   111

		if (tileh == unsafe_slope[mode] ||

   112

				tileh == ComplementSlope(unsafe_slope[mode])) {

   113

			_terraform_err_tile = tile;

   114

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   115

			return -1;

   116

		}

   117

   118

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

   119

		// tile can be terraformed.

   120

		if (IsPlainRailTile(tile) && GetTrackBits(tile) == safe_track[mode]) {

   121

			/* If terraforming downwards prevent damaging a potential tunnel below.

   122

			 * This check is only necessary for flat tiles, because if the tile is

   123

			 * non-flat, then the corner opposing the rail is raised. Only this corner

   124

			 * can be lowered and this is a safe action

   125

			 */

   126

			if (tileh == SLOPE_FLAT &&

   127

					ts->direction == -1 &&

   128

					IsTunnelInWay(tile, z - TILE_HEIGHT)) {

   129

				_terraform_err_tile = tile;

   130

				_error_message = STR_1002_EXCAVATION_WOULD_DAMAGE;

   131

				return -1;

   132

			}

   133

			return 0;

   134

		}

   135

	}

   136

   137

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

   138

   139

	if (ret == CMD_ERROR) {

   140

		_terraform_err_tile = tile;

   141

		return -1;

   142

	}

   143

   144

	ts->cost += ret;

   145

   146

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

   147

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

   148

   149

	return 0;

   150

}

   151

   152

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

   153

{

   154

	int nh;

   155

	TerraformerHeightMod *mod;

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	int count;

   157

   158

	assert(tile < MapSize());

   159

   160

	if (height < 0) {

   161

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   162

		return false;

   163

	}

   164

   165

	_error_message = STR_1004_TOO_HIGH;

   166

   167

	if (height > 15) return false;

   168

   169

	nh = TerraformGetHeightOfTile(ts, tile);

   170

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

   171

   172

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

   173

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

   174

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

   175

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

   176

   177

	mod = ts->modheight;

   178

	count = ts->modheight_count;

   179

   180

	for (;;) {

   181

		if (count == 0) {

   182

			if (ts->modheight_count >= 576) return false;

   183

			ts->modheight_count++;

   184

			break;

   185

		}

   186

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

   187

		mod++;

   188

		count--;

   189

	}

   190

   191

	mod->tile = tile;

   192

	mod->height = (byte)height;

   193

   194

	ts->cost += _price.terraform;

   195

   196

	{

   197

		int direction = ts->direction, r;

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		const TileIndexDiffC *ttm;

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   200

		static const TileIndexDiffC _terraform_tilepos[] = {

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			{ 1,  0},

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			{-2,  0},

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			{ 1,  1},

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			{ 0, -2}

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		};

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   207

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

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			tile += ToTileIndexDiff(*ttm);

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   210

			r = TerraformGetHeightOfTile(ts, tile);

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

   212

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

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					return false;

   214

			}

   215

		}

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	}

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   218

	return true;

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}

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   221

/** Terraform land

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 * @param tile tile to terraform

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 * @param p1 corners to terraform.

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 * @param p2 direction; eg up or down

   225

 */

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

   227

{

   228

	TerraformerState ts;

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	TileIndex t;

   230

	int direction;

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   232

	TerraformerHeightMod modheight_data[576];

   233

	TileIndex tile_table_data[625];

   234

   235

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   236

   237

	_terraform_err_tile = 0;

   238

   239

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

   240

	ts.flags = flags;

   241

	ts.modheight_count = ts.tile_table_count = 0;

   242

	ts.cost = 0;

   243

	ts.modheight = modheight_data;

   244

	ts.tile_table = tile_table_data;

   245

   246

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

   247

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

   248

   249

	if (p1 & 1) {

   250

		t = tile + TileDiffXY(1, 0);

   251

		if (!TerraformTileHeight(&ts, t, TileHeight(t) + direction)) {

   252

			return CMD_ERROR;

   253

		}

   254

	}

   255

   256

	if (p1 & 2) {

   257

		t = tile + TileDiffXY(1, 1);

   258

		if (!TerraformTileHeight(&ts, t, TileHeight(t) + direction)) {

   259

			return CMD_ERROR;

   260

		}

   261

	}

   262

   263

	if (p1 & 4) {

   264

		t = tile + TileDiffXY(0, 1);

   265

		if (!TerraformTileHeight(&ts, t, TileHeight(t) + direction)) {

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			return CMD_ERROR;

   267

		}

   268

	}

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   270

	if (p1 & 8) {

   271

		t = tile + TileDiffXY(0, 0);

   272

		if (!TerraformTileHeight(&ts, t, TileHeight(t) + direction)) {

   273

			return CMD_ERROR;

   274

		}

   275

	}

   276

   277

	if (direction == -1) {

   278

		/* Check if tunnel would take damage */

   279

		int count;

   280

		TileIndex *ti = ts.tile_table;

   281

   282

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

   283

			uint z, t;

   284

			TileIndex tile = *ti;

   285

   286

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

   287

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

   288

			if (t <= z) z = t;

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

   290

			if (t <= z) z = t;

   291

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

   292

			if (t <= z) z = t;

   293

   294

			if (IsTunnelInWay(tile, z * TILE_HEIGHT)) {

   295

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   296

			}

   297

		}

   298

	}

   299

   300

	if (flags & DC_EXEC) {

   301

		/* Clear the landscape at the tiles */

   302

		{

   303

			int count;

   304

			TileIndex *ti = ts.tile_table;

   305

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

   306

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

   307

			}

   308

		}

   309

   310

		/* change the height */

   311

		{

   312

			int count;

   313

			TerraformerHeightMod *mod;

   314

   315

			mod = ts.modheight;

   316

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

   317

				TileIndex til = mod->tile;

   318

   319

				SetTileHeight(til, mod->height);

   320

				TerraformAddDirtyTileAround(&ts, til);

   321

			}

   322

		}

   323

   324

		/* finally mark the dirty tiles dirty */

   325

		{

   326

			int count;

   327

			TileIndex *ti = ts.tile_table;

   328

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

   329

				MarkTileDirtyByTile(*ti);

   330

			}

   331

		}

   332

	}

   333

	return ts.cost;

   334

}

   335

   336

   337

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

   338

 * @param tile end tile of area-drag

   339

 * @param p1 start tile of area drag

   340

 * @param p2 unused

   341

 */

   342

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

   343

{

   344

	int size_x, size_y;

   345

	int ex;

   346

	int ey;

   347

	int sx, sy;

   348

	uint h, curh;

   349

	int32 ret, cost, money;

   350

   351

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

   352

   353

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   354

   355

	// remember level height

   356

	h = TileHeight(p1);

   357

   358

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

   359

	ex = TileX(tile);

   360

	ey = TileY(tile);

   361

	sx = TileX(p1);

   362

	sy = TileY(p1);

   363

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

   364

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

   365

	tile = TileXY(sx, sy);

   366

   367

	size_x = ex-sx+1;

   368

	size_y = ey-sy+1;

   369

   370

	money = GetAvailableMoneyForCommand();

   371

	cost = 0;

   372

   373

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   374

		curh = TileHeight(tile2);

   375

		while (curh != h) {

   376

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

   377

			if (CmdFailed(ret)) break;

   378

			cost += ret;

   379

   380

			if (flags & DC_EXEC) {

   381

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

   382

					_additional_cash_required = ret;

   383

					return cost - ret;

   384

				}

   385

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

   386

			}

   387

   388

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

   389

		}

   390

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   391

   392

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

   393

}

   394

   395

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

   396

 * the name is a bit confusing ;p

   397

 * @param tile the tile the player is purchasing

   398

 * @param p1 unused

   399

 * @param p2 unused

   400

 */

   401

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

   402

{

   403

	int32 cost;

   404

   405

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   406

   407

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   408

   409

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

   410

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   411

	}

   412

   413

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

   414

	if (CmdFailed(cost)) return CMD_ERROR;

   415

   416

	if (flags & DC_EXEC) {

   417

		MakeOwnedLand(tile, _current_player);

   418

		MarkTileDirtyByTile(tile);

   419

	}

   420

   421

	return cost + _price.purchase_land * 10;

   422

}

   423

   424

   425

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   426

{

   427

	static const int32* clear_price_table[] = {

   428

		&_price.clear_1,

   429

		&_price.purchase_land,

   430

		&_price.clear_2,

   431

		&_price.clear_3,

   432

		&_price.purchase_land,

   433

		&_price.purchase_land,

   434

		&_price.clear_2, // XXX unused?

   435

	};

   436

	int32 price;

   437

   438

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

   439

		price = 0;

   440

	} else {

   441

		price = *clear_price_table[GetClearGround(tile)];

   442

	}

   443

   444

	if (flags & DC_EXEC) DoClearSquare(tile);

   445

   446

	return price;

   447

}

   448

   449

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

   450

 * the name is a bit confusing ;p

   451

 * @param tile the tile the player is selling

   452

 * @param p1 unused

   453

 * @param p2 unused

   454

 */

   455

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

   456

{

   457

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   458

   459

	if (!IsOwnedLandTile(tile)) return CMD_ERROR;

   460

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

   461

   462

   463

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   464

   465

	if (flags & DC_EXEC) DoClearSquare(tile);

   466

   467

	return - _price.purchase_land * 2;

   468

}

   469

   470

   471

#include "table/clear_land.h"

   472

   473

   474

void DrawClearLandTile(const TileInfo *ti, byte set)

   475

{

   476

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

   477

}

   478

   479

void DrawHillyLandTile(const TileInfo *ti)

   480

{

   481

	if (ti->tileh != SLOPE_FLAT) {

   482

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

   483

	} else {

   484

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

   485

	}

   486

}

   487

   488

void DrawClearLandFence(const TileInfo *ti)

   489

{

   490

	byte z = ti->z;

   491

   492

	if (ti->tileh & SLOPE_S) {

   493

		z += TILE_HEIGHT;

   494

		if (ti->tileh == SLOPE_STEEP_S) z += TILE_HEIGHT;

   495

	}

   496

   497

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

   498

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