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/* $Id$ */

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/** @file clear_cmd.cpp */

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#include "stdafx.h"

     6

#include "openttd.h"

     7

#include "clear_map.h"

     8

#include "rail_map.h"

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#include "table/strings.h"

    10

#include "functions.h"

    11

#include "map.h"

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#include "player.h"

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#include "tile.h"

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#include "viewport.h"

    15

#include "command.h"

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#include "tunnel_map.h"

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#include "bridge_map.h"

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#include "bridge.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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#include "genworld.h"

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#include "industry.h"

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    26

struct TerraformerHeightMod {

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	TileIndex tile;

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	byte height;

    29

};

    30

    31

struct TerraformerState {

    32

	int height[4];

    33

	uint32 flags;

    34

    35

	int direction;

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	int modheight_count;

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	int tile_table_count;

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    39

	int32 cost;

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    41

	TileIndex *tile_table;

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	TerraformerHeightMod *modheight;

    43

    44

};

    45

    46

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    47

{

    48

	TileIndex *t;

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	int count;

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    51

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

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    53

	t = ts->tile_table;

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

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		if (*t == tile) return 0;

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	}

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    58

	return 1;

    59

}

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    61

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

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{

    63

	TerraformerHeightMod *mod = ts->modheight;

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	int count;

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    66

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

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

    68

	}

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    70

	return TileHeight(tile);

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}

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    73

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

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{

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	int count;

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	TileIndex *t;

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    78

	count = ts->tile_table_count;

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    80

	if (count >= 625) return;

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    82

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

    83

		if (*t == tile) return;

    84

	}

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    86

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

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}

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    89

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

    90

{

    91

	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);

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}

    96

    97

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

    98

{

    99

	int r;

   100

	int32 ret;

   101

   102

	assert(tile < MapSize());

   103

   104

	r = TerraformAllowTileProcess(ts, tile);

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	if (r <= 0) return r;

   106

   107

	if (IsTileType(tile, MP_RAILWAY)) {

   108

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

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

   110

   111

		Slope tileh;

   112

		uint z;

   113

   114

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

   115

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

   116

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

   117

		tileh = GetTileSlope(tile, &z);

   118

		if (tileh == unsafe_slope[mode] ||

   119

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

   120

			_terraform_err_tile = tile;

   121

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   122

			return -1;

   123

		}

   124

   125

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

   126

		 * tile can be terraformed. */

   127

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

   128

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

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

   130

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

   131

			 * can be lowered and this is a safe action

   132

			 */

   133

			if (tileh == SLOPE_FLAT &&

   134

					ts->direction == -1 &&

   135

					IsTunnelInWay(tile, z - TILE_HEIGHT)) {

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				_terraform_err_tile = tile;

   137

				_error_message = STR_1002_EXCAVATION_WOULD_DAMAGE;

   138

				return -1;

   139

			}

   140

			return 0;

   141

		}

   142

	}

   143

   144

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

   145

   146

	if (CmdFailed(ret)) {

   147

		_terraform_err_tile = tile;

   148

		return -1;

   149

	}

   150

   151

	ts->cost += ret;

   152

   153

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

   154

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

   155

   156

	return 0;

   157

}

   158

   159

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

   160

{

   161

	int nh;

   162

	TerraformerHeightMod *mod;

   163

	int count;

   164

   165

	assert(tile < MapSize());

   166

   167

	if (height < 0) {

   168

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   169

		return false;

   170

	}

   171

   172

	_error_message = STR_1004_TOO_HIGH;

   173

   174

	if (height > 15) return false;

   175

   176

	nh = TerraformGetHeightOfTile(ts, tile);

   177

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

   178

   179

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

   180

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

   181

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

   182

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

   183

   184

	mod = ts->modheight;

   185

	count = ts->modheight_count;

   186

   187

	for (;;) {

   188

		if (count == 0) {

   189

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

   190

			ts->modheight_count++;

   191

			break;

   192

		}

   193

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

   194

		mod++;

   195

		count--;

   196

	}

   197

   198

	mod->tile = tile;

   199

	mod->height = (byte)height;

   200

   201

	ts->cost += _price.terraform;

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   203

	{

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		int direction = ts->direction, r;

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		const TileIndexDiffC *ttm;

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   207

		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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   214

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

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			tile += ToTileIndexDiff(*ttm);

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   217

			r = TerraformGetHeightOfTile(ts, tile);

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

   219

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

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					return false;

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			}

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		}

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	}

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   225

	return true;

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}

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   228

/** Terraform land

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 * @param tile tile to terraform

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 * @param flags for this command type

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 * @param p1 corners to terraform.

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 * @param p2 direction; eg up or down

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 * @return error or cost of terraforming

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 */

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

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{

   237

	TerraformerState ts;

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	TileIndex t;

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	int direction;

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   241

	TerraformerHeightMod modheight_data[576];

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	TileIndex tile_table_data[625];

   243

   244

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   245

   246

	_terraform_err_tile = 0;

   247

   248

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

   249

	ts.flags = flags;

   250

	ts.modheight_count = ts.tile_table_count = 0;

   251

	ts.cost = 0;

   252

	ts.modheight = modheight_data;

   253

	ts.tile_table = tile_table_data;

   254

   255

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

   256

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

   257

   258

	if (p1 & 1) {

   259

		t = tile + TileDiffXY(1, 0);

   260

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

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			return CMD_ERROR;

   262

		}

   263

	}

   264

   265

	if (p1 & 2) {

   266

		t = tile + TileDiffXY(1, 1);

   267

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

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			return CMD_ERROR;

   269

		}

   270

	}

   271

   272

	if (p1 & 4) {

   273

		t = tile + TileDiffXY(0, 1);

   274

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

   275

			return CMD_ERROR;

   276

		}

   277

	}

   278

   279

	if (p1 & 8) {

   280

		t = tile + TileDiffXY(0, 0);

   281

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

   282

			return CMD_ERROR;

   283

		}

   284

	}

   285

   286

	{

   287

		/* Check if tunnel would take damage */

   288

		int count;

   289

		TileIndex *ti = ts.tile_table;

   290

   291

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

   292

			TileIndex tile = *ti;

   293

   294

			if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {

   295

				return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);

   296

			}

   297

   298

			if (direction == -1) {

   299

				uint z, t;

   300

   301

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

   302

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

   303

				if (t <= z) z = t;

   304

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

   305

				if (t <= z) z = t;

   306

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

   307

				if (t <= z) z = t;

   308

   309

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

   310

					return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   311

				}

   312

			}

   313

		}

   314

	}

   315

   316

	if (flags & DC_EXEC) {

   317

		/* Clear the landscape at the tiles */

   318

		{

   319

			int count;

   320

			TileIndex *ti = ts.tile_table;

   321

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

   322

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

   323

			}

   324

		}

   325

   326

		/* change the height */

   327

		{

   328

			int count;

   329

			TerraformerHeightMod *mod;

   330

   331

			mod = ts.modheight;

   332

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

   333

				TileIndex til = mod->tile;

   334

   335

				SetTileHeight(til, mod->height);

   336

				TerraformAddDirtyTileAround(&ts, til);

   337

			}

   338

		}

   339

   340

		/* finally mark the dirty tiles dirty */

   341

		{

   342

			int count;

   343

			TileIndex *ti = ts.tile_table;

   344

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

   345

				MarkTileDirtyByTile(*ti);

   346

			}

   347

		}

   348

	}

   349

	return ts.cost;

   350

}

   351

   352

   353

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

   354

 * @param tile end tile of area-drag

   355

 * @param flags for this command type

   356

 * @param p1 start tile of area drag

   357

 * @param p2 unused

   358

 * @return  error or cost of terraforming

   359

 */

   360

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

   361

{

   362

	int size_x, size_y;

   363

	int ex;

   364

	int ey;

   365

	int sx, sy;

   366

	uint h, curh;

   367

	int32 ret, cost, money;

   368

   369

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

   370

   371

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   372

   373

	/* remember level height */

   374

	h = TileHeight(p1);

   375

   376

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

   377

	ex = TileX(tile);

   378

	ey = TileY(tile);

   379

	sx = TileX(p1);

   380

	sy = TileY(p1);

   381

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

   382

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

   383

	tile = TileXY(sx, sy);

   384

   385

	size_x = ex-sx+1;

   386

	size_y = ey-sy+1;

   387

   388

	money = GetAvailableMoneyForCommand();

   389

	cost = 0;

   390

   391

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   392

		curh = TileHeight(tile2);

   393

		while (curh != h) {

   394

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

   395

			if (CmdFailed(ret)) break;

   396

			cost += ret;

   397

   398

			if (flags & DC_EXEC) {

   399

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

   400

					_additional_cash_required = ret;

   401

					return cost - ret;

   402

				}

   403

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

   404

			}

   405

   406

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

   407

		}

   408

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   409

   410

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

   411

}

   412

   413

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

   414

 * the name is a bit confusing ;p

   415

 * @param tile the tile the player is purchasing

   416

 * @param flags for this command type

   417

 * @param p1 unused

   418

 * @param p2 unused

   419

 * @return error of cost of operation

   420

 */

   421

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

   422

{

   423

	int32 cost;

   424

   425

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   426

   427

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   428

   429

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

   430

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   431

	}

   432

   433

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

   434

	if (CmdFailed(cost)) return CMD_ERROR;

   435

   436

	if (flags & DC_EXEC) {

   437

		MakeOwnedLand(tile, _current_player);

   438

		MarkTileDirtyByTile(tile);

   439

	}

   440

   441

	return cost + _price.purchase_land * 10;

   442

}

   443

   444

   445

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   446

{

   447

	static const int32* clear_price_table[] = {

   448

		&_price.clear_1,

   449

		&_price.purchase_land,

   450

		&_price.clear_2,

   451

		&_price.clear_3,

   452

		&_price.purchase_land,

   453

		&_price.purchase_land,

   454

		&_price.clear_2, // XXX unused?

   455

	};

   456

	int32 price;

   457

   458

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

   459

		price = 0;

   460

	} else {

   461

		price = *clear_price_table[GetClearGround(tile)];

   462

	}

   463

   464

	if (flags & DC_EXEC) DoClearSquare(tile);

   465

   466

	return price;

   467

}

   468

   469

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

   470

 * the name is a bit confusing ;p

   471

 * @param tile the tile the player is selling

   472

 * @param flags for this command type

   473

 * @param p1 unused

   474

 * @param p2 unused

   475

 * @return error or cost of operation

   476

 */

   477

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

   478

{

   479

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   480

   481

	if (!IsOwnedLandTile(tile)) return CMD_ERROR;

   482

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

   483

   484

   485

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   486

   487

	if (flags & DC_EXEC) DoClearSquare(tile);

   488

   489

	return - _price.purchase_land * 2;

   490

}

   491

   492

   493

#include "table/clear_land.h"

   494

   495

   496

void DrawClearLandTile(const TileInfo *ti, byte set)