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/* $Id$ */

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#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear_map.h"

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#include "table/strings.h"

     7

#include "functions.h"

     8

#include "map.h"

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#include "player.h"

    10

#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"

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    18

typedef struct TerraformerHeightMod {

    19

	TileIndex tile;

    20

	byte height;

    21

} TerraformerHeightMod;

    22

    23

typedef struct TerraformerState {

    24

	int height[4];

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	uint32 flags;

    26

    27

	int direction;

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	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

	}

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    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++) {

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

    60

	}

    61

    62

	return TileHeight(tile);

    63

}

    64

    65

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

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{

    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));

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

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	TerraformAddDirtyTile(ts, tile);

    87

}

    88

    89

static int TerraformProc(TerraformerState *ts, TileIndex tile)

    90

{

    91

	int r;

    92

    93

	assert(tile < MapSize());

    94

    95

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

    96

    97

	if (!IsTileType(tile, MP_RAILWAY)) {

    98

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

    99

   100

		if (CmdFailed(ret)) {

   101

			_terraform_err_tile = tile;

   102

			return -1;

   103

		}

   104

   105

		ts->cost += ret;

   106

	}

   107

   108

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

   109

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

   110

   111

	return 0;

   112

}

   113

   114

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

   115

{

   116

	int nh;

   117

	TerraformerHeightMod *mod;

   118

	int count;

   119

   120

	assert(tile < MapSize());

   121

   122

	if (height < 0) {

   123

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   124

		return false;

   125

	}

   126

   127

	_error_message = STR_1004_TOO_HIGH;

   128

   129

	if (height > 15) return false;

   130

   131

	nh = TerraformGetHeightOfTile(ts, tile);

   132

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

   133

   134

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

   135

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

   136

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

   137

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

   138

   139

	mod = ts->modheight;

   140

	count = ts->modheight_count;

   141

   142

	for (;;) {

   143

		if (count == 0) {

   144

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

   145

			ts->modheight_count++;

   146

			break;

   147

		}

   148

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

   149

		mod++;

   150

		count--;

   151

	}

   152

   153

	mod->tile = tile;

   154

	mod->height = (byte)height;

   155

   156

	ts->cost += _price.terraform;

   157

   158

	{

   159

		int direction = ts->direction, r;

   160

		const TileIndexDiffC *ttm;

   161

   162

		static const TileIndexDiffC _terraform_tilepos[] = {

   163

			{ 1,  0},

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			{-2,  0},

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			{ 1,  1},

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			{ 0, -2}

   167

		};

   168

   169

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

   170

			tile += ToTileIndexDiff(*ttm);

   171

   172

			r = TerraformGetHeightOfTile(ts, tile);

   173

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

   174

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

   175

					return false;

   176

			}

   177

		}

   178

	}

   179

   180

	return true;

   181

}

   182

   183

/** Terraform land

   184

 * @param tile tile to terraform

   185

 * @param p1 corners to terraform.

   186

 * @param p2 direction; eg up or down

   187

 */

   188

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

   189

{

   190

	TerraformerState ts;

   191

	TileIndex t;

   192

	int direction;

   193

   194

	TerraformerHeightMod modheight_data[576];

   195

	TileIndex tile_table_data[625];

   196

   197

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   198

   199

	_terraform_err_tile = 0;

   200

   201

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

   202

	ts.flags = flags;

   203

	ts.modheight_count = ts.tile_table_count = 0;

   204

	ts.cost = 0;

   205

	ts.modheight = modheight_data;

   206

	ts.tile_table = tile_table_data;

   207

   208

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

   209

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

   210

   211

	if (p1 & 1) {

   212

		t = tile + TileDiffXY(1, 0);

   213

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

   214

			return CMD_ERROR;

   215

		}

   216

	}

   217

   218

	if (p1 & 2) {

   219

		t = tile + TileDiffXY(1, 1);

   220

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

   221

			return CMD_ERROR;

   222

		}

   223

	}

   224

   225

	if (p1 & 4) {

   226

		t = tile + TileDiffXY(0, 1);

   227

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

   228

			return CMD_ERROR;

   229

		}

   230

	}

   231

   232

	if (p1 & 8) {

   233

		t = tile + TileDiffXY(0, 0);

   234

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

   235

			return CMD_ERROR;

   236

		}

   237

	}

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   239

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

   240

		int count;

   241

		TileIndex *ti = ts.tile_table;

   242

   243

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

   244

			uint a, b, c, d, min;

   245

			Slope s;

   246

			TileIndex tile = *ti;

   247

   248

			_terraform_err_tile = tile;

   249

   250

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

   251

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

   252

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

   253

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

   254

   255

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

   256

   257

			if (IsTileType(tile, MP_RAILWAY)) {

   258

				if (IsSteepSlope(s)) return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   259

   260

				if (IsPlainRailTile(tile)) {

   261

					/* We need to check if a rail is on a leveled foundation and

   262

					 * then treat it as such. Important for correct tunneling */

   263

					extern const TrackBits _valid_tileh_slopes[2][15];

   264

					TrackBits tb = GetTrackBits(tile);

   265

					uint foundation = (GetRailFoundation(s, tb) == 0) ? 1 : 0;

   266

   267

					if (tb & ~_valid_tileh_slopes[foundation][s]) return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);

   268

				} else return_cmd_error(STR_5800_OBJECT_IN_THE_WAY);

   269

			}

   270

   271

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

   272

   273

			_terraform_err_tile = 0;

   274

		}

   275

	}

   276

   277

	if (flags & DC_EXEC) {

   278

		/* Clear the landscape at the tiles */

   279

		{

   280

			int count;

   281

			TileIndex *ti = ts.tile_table;

   282

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

   283

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

   284

			}

   285

		}

   286

   287

		/* change the height */

   288

		{

   289

			int count;

   290

			TerraformerHeightMod *mod;

   291

   292

			mod = ts.modheight;

   293

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

   294

				TileIndex til = mod->tile;

   295

   296

				SetTileHeight(til, mod->height);

   297

				TerraformAddDirtyTileAround(&ts, til);

   298

			}

   299

		}

   300

   301

		/* finally mark the dirty tiles dirty */

   302

		{

   303

			int count;

   304

			TileIndex *ti = ts.tile_table;

   305

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

   306

				MarkTileDirtyByTile(*ti);

   307

			}

   308

		}

   309

	}

   310

	return ts.cost;

   311

}

   312

   313

   314

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

   315

 * @param tile end tile of area-drag

   316

 * @param p1 start tile of area drag

   317

 * @param p2 unused

   318

 */

   319

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

   320

{

   321

	int size_x, size_y;

   322

	int ex;

   323

	int ey;

   324

	int sx, sy;

   325

	uint h, curh;

   326

	int32 ret, cost, money;

   327

   328

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

   329

   330

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   331

   332

	// remember level height

   333

	h = TileHeight(p1);

   334

   335

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

   336

	ex = TileX(tile);

   337

	ey = TileY(tile);

   338

	sx = TileX(p1);

   339

	sy = TileY(p1);

   340

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

   341

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

   342

	tile = TileXY(sx, sy);

   343

   344

	size_x = ex-sx+1;

   345

	size_y = ey-sy+1;

   346

   347

	money = GetAvailableMoneyForCommand();

   348

	cost = 0;

   349

   350

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   351

		curh = TileHeight(tile2);

   352

		while (curh != h) {

   353

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

   354

			if (CmdFailed(ret)) break;

   355

			cost += ret;

   356

   357

			if (flags & DC_EXEC) {

   358

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

   359

					_additional_cash_required = ret;

   360

					return cost - ret;

   361

				}

   362

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

   363

			}

   364

   365

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

   366

		}

   367

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   368

   369

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

   370

}

   371

   372

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

   373

 * the name is a bit confusing ;p

   374

 * @param tile the tile the player is purchasing

   375

 * @param p1 unused

   376

 * @param p2 unused

   377

 */

   378

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

   379

{

   380

	int32 cost;

   381

   382

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   383

   384

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   385

   386

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

   387

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   388

	}

   389

   390

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

   391

	if (CmdFailed(cost)) return CMD_ERROR;

   392

   393

	if (flags & DC_EXEC) {

   394

		MakeOwnedLand(tile, _current_player);

   395

		MarkTileDirtyByTile(tile);

   396

	}

   397

   398

	return cost + _price.purchase_land * 10;

   399

}

   400

   401

   402

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   403

{

   404

	static const int32* clear_price_table[] = {

   405

		&_price.clear_1,

   406

		&_price.purchase_land,

   407

		&_price.clear_2,

   408

		&_price.clear_3,

   409

		&_price.purchase_land,

   410

		&_price.purchase_land,

   411

		&_price.clear_2, // XXX unused?

   412

	};

   413

	int32 price;

   414

   415

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

   416

		price = 0;

   417

	} else {

   418

		price = *clear_price_table[GetClearGround(tile)];

   419

	}

   420

   421

	if (flags & DC_EXEC) DoClearSquare(tile);

   422

   423

	return price;

   424

}

   425

   426

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

   427

 * the name is a bit confusing ;p

   428

 * @param tile the tile the player is selling

   429

 * @param p1 unused

   430

 * @param p2 unused

   431

 */

   432

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

   433

{

   434

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   435

   436

	if (!IsOwnedLandTile(tile)) return CMD_ERROR;

   437

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

   438

   439

   440

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   441

   442

	if (flags & DC_EXEC) DoClearSquare(tile);

   443

   444

	return - _price.purchase_land * 2;

   445

}

   446

   447

   448

#include "table/clear_land.h"

   449

   450

   451

void DrawClearLandTile(const TileInfo *ti, byte set)

   452

{

   453

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

   454

}

   455

   456

void DrawHillyLandTile(const TileInfo *ti)

   457

{

   458

	if (ti->tileh != SLOPE_FLAT) {

   459

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

   460

	} else {

   461

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

   462

	}

   463

}

   464

   465

void DrawClearLandFence(const TileInfo *ti)

   466

{

   467

	byte z = ti->z;

   468

   469

	if (ti->tileh & SLOPE_S) {

   470

		z += TILE_HEIGHT;

   471

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

   472

	}

   473

   474

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

   475

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

   476

	}

   477

   478

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

   479

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

   480

	}

   481

}

   482

   483

static void DrawTile_Clear(TileInfo *ti)

   484

{

   485

	switch (GetClearGround(ti->tile)) {

   486

		case CLEAR_GRASS:

   487

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

   488

			break;

   489

   490

		case CLEAR_ROUGH:

   491

			DrawHillyLandTile(ti);

   492

			break;

   493

   494

		case CLEAR_ROCKS:

   495

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

   496

			break;

   497

   498

		case CLEAR_FIELDS: