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/* $Id$ */

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#include "stdafx.h"

     4

#include "openttd.h"

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#include "table/strings.h"

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#include "functions.h"

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#include "map.h"

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#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 "variables.h"

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#include "table/sprites.h"

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    16

typedef struct TerraformerHeightMod {

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	TileIndex tile;

    18

	byte height;

    19

} TerraformerHeightMod;

    20

    21

typedef struct TerraformerState {

    22

	int height[4];

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	uint32 flags;

    24

    25

	int direction;

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	int modheight_count;

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	int tile_table_count;

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    29

	int32 cost;

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    31

	TileIndex *tile_table;

    32

	TerraformerHeightMod *modheight;

    33

    34

} TerraformerState;

    35

    36

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    37

{

    38

	TileIndex *t;

    39

	int count;

    40

    41

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

    42

    43

	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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    48

	return 1;

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}

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    51

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

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{

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	TerraformerHeightMod *mod = ts->modheight;

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	int count;

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	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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    60

	return TileHeight(tile);

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}

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    63

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    64

{

    65

	int count;

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	TileIndex *t;

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    68

	count = ts->tile_table_count;

    69

    70

	if (count >= 625) return;

    71

    72

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

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		if (*t == tile) return;

    74

	}

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    76

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

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}

    78

    79

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

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{

    81

	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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}

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    87

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

    88

{

    89

	int r;

    90

	bool skip_clear = false;

    91

    92

	assert(tile < MapSize());

    93

    94

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

    95

		return r;

    96

    97

	if (IsTileType(tile, MP_RAILWAY)) {

    98

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

    99

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

   100

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

   101

   102

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

   103

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

   104

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

   105

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

   106

		if (tileh == _railway_dangslopes[mode] ||

   107

				tileh == _railway_dangslopes2[mode]) {

   108

			_terraform_err_tile = tile;

   109

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   110

			return -1;

   111

		}

   112

   113

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

   114

		// tile can be terraformed.

   115

		if ((_m[tile].m5 & ~0x40) == _railway_modes[mode]) {

   116

			if (ts->direction == 1) return 0;

   117

			skip_clear = true;

   118

		}

   119

	}

   120

   121

	if (!skip_clear) {

   122

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

   123

   124

		if (CmdFailed(ret)) {

   125

			_terraform_err_tile = tile;

   126

			return -1;

   127

		}

   128

   129

		ts->cost += ret;

   130

	}

   131

   132

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

   133

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

   134

   135

	return 0;

   136

}

   137

   138

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

   139

{

   140

	int nh;

   141

	TerraformerHeightMod *mod;

   142

	int count;

   143

   144

	assert(tile < MapSize());

   145

   146

	if (height < 0) {

   147

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

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		return false;

   149

	}

   150

   151

	_error_message = STR_1004_TOO_HIGH;

   152

   153

	if (height > 15) return false;

   154

   155

	nh = TerraformGetHeightOfTile(ts, tile);

   156

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

   157

   158

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

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

   160

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

   161

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

   162

   163

	mod = ts->modheight;

   164

	count = ts->modheight_count;

   165

   166

	for (;;) {

   167

		if (count == 0) {

   168

			if (ts->modheight_count >= 576)

   169

				return false;

   170

			ts->modheight_count++;

   171

			break;

   172

		}

   173

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

   174

		mod++;

   175

		count--;

   176

	}

   177

   178

	mod->tile = tile;

   179

	mod->height = (byte)height;

   180

   181

	ts->cost += _price.terraform;

   182

   183

	{

   184

		int direction = ts->direction, r;

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		const TileIndexDiffC *ttm;

   186

   187

		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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   194

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

   195

			tile += ToTileIndexDiff(*ttm);

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   197

			r = TerraformGetHeightOfTile(ts, tile);

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

   199

				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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   205

	return true;

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}

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   208

/** Terraform land

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 * @param x,y coordinates to terraform

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 * @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)

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{

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	TerraformerState ts;

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	TileIndex tile;

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	int direction;

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   219

	TerraformerHeightMod modheight_data[576];

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	TileIndex tile_table_data[625];

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   222

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

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   224

	_error_message = INVALID_STRING_ID;

   225

	_terraform_err_tile = 0;

   226

   227

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

   228

	ts.flags = flags;

   229

	ts.modheight_count = ts.tile_table_count = 0;

   230

	ts.cost = 0;

   231

	ts.modheight = modheight_data;

   232

	ts.tile_table = tile_table_data;

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   234

	tile = TileVirtXY(x, y);

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   236

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

   237

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

   238

   239

	if (p1 & 1) {

   240

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

   241

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

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					return CMD_ERROR;

   243

	}

   244

   245

	if (p1 & 2) {

   246

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

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

   248

					return CMD_ERROR;

   249

	}

   250

   251

	if (p1 & 4) {

   252

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

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

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					return CMD_ERROR;

   255

	}

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   257

	if (p1 & 8) {

   258

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

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

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					return CMD_ERROR;

   261

	}

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   263

	if (direction == -1) {

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		/* Check if tunnel would take damage */

   265

		int count;

   266

		TileIndex *ti = ts.tile_table;

   267

   268

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

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			uint z, t;

   270

			TileIndex tile = *ti;

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   272

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

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

   274

			if (t <= z) z = t;

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

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			if (t <= z) z = t;

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

   278

			if (t <= z) z = t;

   279

   280

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

   281

				return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   282

			}

   283

		}

   284

	}

   285

   286

	if (flags & DC_EXEC) {

   287

		/* Clear the landscape at the tiles */

   288

		{

   289

			int count;

   290

			TileIndex *ti = ts.tile_table;

   291

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

   292

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

   293

			}

   294

		}

   295

   296

		/* change the height */

   297

		{

   298

			int count;

   299

			TerraformerHeightMod *mod;

   300

   301

			mod = ts.modheight;

   302

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

   303

				TileIndex til = mod->tile;

   304

   305

				SetTileHeight(til, mod->height);

   306

				TerraformAddDirtyTileAround(&ts, til);

   307

			}

   308

		}

   309

   310

		/* finally mark the dirty tiles dirty */

   311

		{

   312

			int count;

   313

			TileIndex *ti = ts.tile_table;

   314

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

   315

				MarkTileDirtyByTile(*ti);

   316

			}

   317

		}

   318

	}

   319

	return ts.cost;

   320

}

   321

   322

   323

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

   324

 * @param x,y end tile of area-drag

   325

 * @param p1 start tile of area drag

   326

 * @param p2 unused

   327

 */

   328

int32 CmdLevelLand(int ex, int ey, uint32 flags, uint32 p1, uint32 p2)

   329

{

   330

	int size_x, size_y;

   331

	int sx, sy;

   332

	uint h, curh;

   333

	TileIndex tile;

   334

	int32 ret, cost, money;

   335

   336

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

   337

   338

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   339

   340

	// remember level height

   341

	h = TileHeight(p1);

   342

   343

	ex >>= 4; ey >>= 4;

   344

   345

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

   346

	sx = TileX(p1);

   347

	sy = TileY(p1);

   348

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

   349

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

   350

	tile = TileXY(sx, sy);

   351

   352

	size_x = ex-sx+1;

   353

	size_y = ey-sy+1;

   354

   355

	money = GetAvailableMoneyForCommand();

   356

	cost = 0;

   357

   358

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   359

		curh = TileHeight(tile2);

   360

		while (curh != h) {

   361

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

   362

			if (CmdFailed(ret)) break;

   363

			cost += ret;

   364

   365

			if (flags & DC_EXEC) {

   366

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

   367

					_additional_cash_required = ret;

   368

					return cost - ret;

   369

				}

   370

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

   371

			}

   372

   373

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

   374

		}

   375

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   376

   377

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

   378

}

   379

   380

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

   381

 * the name is a bit confusing ;p

   382

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

   383

 * @param p1 unused

   384

 * @param p2 unused

   385

 */

   386

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

   387

{

   388

	TileIndex tile;

   389

	int32 cost;

   390

   391

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   392

   393

	tile = TileVirtXY(x, y);

   394

   395

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   396

   397

	if (IsTileType(tile, MP_UNMOVABLE) && _m[tile].m5 == 3 &&

   398

			IsTileOwner(tile, _current_player))

   399

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   400

   401

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

   402

	if (CmdFailed(cost)) return CMD_ERROR;

   403

   404

	if (flags & DC_EXEC) {

   405

		ModifyTile(tile,

   406

			MP_SETTYPE(MP_UNMOVABLE) | MP_MAPOWNER_CURRENT | MP_MAP5,

   407

			3 /* map5 */

   408

			);

   409

	}

   410

   411

	return cost + _price.purchase_land * 10;

   412

}

   413

   414

   415

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   416

{

   417

	static const int32* clear_price_table[] = {

   418

		&_price.clear_1,

   419

		&_price.purchase_land,

   420

		&_price.clear_2,

   421

		&_price.clear_3,

   422

		&_price.purchase_land,

   423

		&_price.purchase_land,

   425

	};

   433

   434

	if (flags & DC_EXEC) DoClearSquare(tile);

   435

   437

}

   438

   439

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

   440

 * the name is a bit confusing ;p

   441

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

   442

 * @param p1 unused

   443

 * @param p2 unused

   444

 */

   445

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

   446

{

   447

	TileIndex tile;

   448

   449

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   450

   451

	tile = TileVirtXY(x, y);

   452

   453

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

   454

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

   455

   456

   457

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   458

   459

	if (flags & DC_EXEC)

   460

		DoClearSquare(tile);

   461

   462

	return - _price.purchase_land * 2;

   463

}

   464

   465

   466

#include "table/clear_land.h"

   467

   468

   469

void DrawClearLandTile(const TileInfo *ti, byte set)

   470

{

   471

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

   472

}

   473

   474

void DrawHillyLandTile(const TileInfo *ti)

   475

{

   476

	if (ti->tileh != 0) {

   477

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

   478

	} else {

   479

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

   480

	}

   481

}

   482

   483

void DrawClearLandFence(const TileInfo *ti)

   484

{

   485

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

   486

	byte z = ti->z;

   487

   488

	if (ti->tileh & 2) {

   489

		z += 8;

   490

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

   491

	}

   492

   493

	if (GB(m4, 5, 3) != 0) {

   494

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[GB(m4, 5, 3) - 1] + _fence_mod_by_tileh[ti->tileh], ti->x, ti->y, z);

   495

	}

   496

   497

	if (GB(m4, 2, 3) != 0) {

   498

		DrawGroundSpriteAt(_clear_land_fence_sprites_1[GB(m4, 2, 3) - 1] + _fence_mod_by_tileh_2[ti->tileh], ti->x, ti->y, z);

   499

	}

   500

}

   501

   502

static void DrawTile_Clear(TileInfo *ti)

   503

{