1

/* $Id$ */

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#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear_map.h"

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#include "rail_map.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 "tunnel_map.h"

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#include "bridge_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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#include "genworld.h"

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#include "industry.h"

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    22

typedef struct TerraformerHeightMod {

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	TileIndex tile;

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	byte height;

    25

} TerraformerHeightMod;

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    27

typedef struct TerraformerState {

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	int height[4];

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	uint32 flags;

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    31

	int direction;

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	int modheight_count;

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	int tile_table_count;

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    35

	int32 cost;

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    37

	TileIndex *tile_table;

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	TerraformerHeightMod *modheight;

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    40

} TerraformerState;

    41

    42

static int TerraformAllowTileProcess(TerraformerState *ts, TileIndex tile)

    43

{

    44

	TileIndex *t;

    45

	int count;

    46

    47

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

    48

    49

	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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    54

	return 1;

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}

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    57

static int TerraformGetHeightOfTile(TerraformerState *ts, TileIndex tile)

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{

    59

	TerraformerHeightMod *mod = ts->modheight;

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	int count;

    61

    62

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

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

    64

	}

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    66

	return TileHeight(tile);

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}

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    69

static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)

    70

{

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	int count;

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	TileIndex *t;

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    74

	count = ts->tile_table_count;

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    76

	if (count >= 625) return;

    77

    78

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

    79

		if (*t == tile) return;

    80

	}

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    82

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

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}

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    85

static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)

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{

    87

	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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}

    92

    93

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

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{

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	int r;

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	int32 ret;

    97

    98

	assert(tile < MapSize());

    99

   100

	r = TerraformAllowTileProcess(ts, tile);

   101

	if (r <= 0) return r;

   102

   103

	if (IsTileType(tile, MP_RAILWAY)) {

   104

		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 };

   106

   107

		Slope tileh;

   108

		uint z;

   109

   110

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

   111

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

   112

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

   113

		tileh = GetTileSlope(tile, &z);

   114

		if (tileh == unsafe_slope[mode] ||

   115

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

   116

			_terraform_err_tile = tile;

   117

			_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;

   118

			return -1;

   119

		}

   120

   121

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

   122

		// tile can be terraformed.

   123

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

   124

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

   125

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

   126

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

   127

			 * can be lowered and this is a safe action

   128

			 */

   129

			if (tileh == SLOPE_FLAT &&

   130

					ts->direction == -1 &&

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					IsTunnelInWay(tile, z - TILE_HEIGHT)) {

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				_terraform_err_tile = tile;

   133

				_error_message = STR_1002_EXCAVATION_WOULD_DAMAGE;

   134

				return -1;

   135

			}

   136

			return 0;

   137

		}

   138

	}

   139

   140

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

   141

   142

	if (CmdFailed(ret)) {

   143

		_terraform_err_tile = tile;

   144

		return -1;

   145

	}

   146

   147

	ts->cost += ret;

   148

   149

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

   150

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

   151

   152

	return 0;

   153

}

   154

   155

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

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{

   157

	int nh;

   158

	TerraformerHeightMod *mod;

   159

	int count;

   160

   161

	assert(tile < MapSize());

   162

   163

	if (height < 0) {

   164

		_error_message = STR_1003_ALREADY_AT_SEA_LEVEL;

   165

		return false;

   166

	}

   167

   168

	_error_message = STR_1004_TOO_HIGH;

   169

   170

	if (height > 15) return false;

   171

   172

	nh = TerraformGetHeightOfTile(ts, tile);

   173

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

   174

   175

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

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

   177

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

   178

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

   179

   180

	mod = ts->modheight;

   181

	count = ts->modheight_count;

   182

   183

	for (;;) {

   184

		if (count == 0) {

   185

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

   186

			ts->modheight_count++;

   187

			break;

   188

		}

   189

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

   190

		mod++;

   191

		count--;

   192

	}

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   194

	mod->tile = tile;

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	mod->height = (byte)height;

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   197

	ts->cost += _price.terraform;

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   199

	{

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		int direction = ts->direction, r;

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		const TileIndexDiffC *ttm;

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   203

		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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   210

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

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			tile += ToTileIndexDiff(*ttm);

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   213

			r = TerraformGetHeightOfTile(ts, tile);

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

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				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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   221

	return true;

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}

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   224

/** 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

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 */

   229

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

   230

{

   231

	TerraformerState ts;

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	TileIndex t;

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	int direction;

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   235

	TerraformerHeightMod modheight_data[576];

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	TileIndex tile_table_data[625];

   237

   238

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

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   240

	_terraform_err_tile = 0;

   241

   242

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

   243

	ts.flags = flags;

   244

	ts.modheight_count = ts.tile_table_count = 0;

   245

	ts.cost = 0;

   246

	ts.modheight = modheight_data;

   247

	ts.tile_table = tile_table_data;

   248

   249

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

   250

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

   251

   252

	if (p1 & 1) {

   253

		t = tile + TileDiffXY(1, 0);

   254

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

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			return CMD_ERROR;

   256

		}

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	}

   258

   259

	if (p1 & 2) {

   260

		t = tile + TileDiffXY(1, 1);

   261

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

   262

			return CMD_ERROR;

   263

		}

   264

	}

   265

   266

	if (p1 & 4) {

   267

		t = tile + TileDiffXY(0, 1);

   268

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

   269

			return CMD_ERROR;

   270

		}

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	}

   272

   273

	if (p1 & 8) {

   274

		t = tile + TileDiffXY(0, 0);

   275

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

   276

			return CMD_ERROR;

   277

		}

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	}

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   280

	{

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		/* Check if tunnel would take damage */

   282

		int count;

   283

		TileIndex *ti = ts.tile_table;

   284

   285

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

   286

			TileIndex tile = *ti;

   287

   288

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

   289

				return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);

   290

			}

   291

   292

			if (direction == -1) {

   293

				uint z, t;

   294

   295

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

   296

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

   297

				if (t <= z) z = t;

   298

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

   299

				if (t <= z) z = t;

   300

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

   301

				if (t <= z) z = t;

   302

   303

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

   304

					return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE);

   305

				}

   306

			}

   307

		}

   308

	}

   309

   310

	if (flags & DC_EXEC) {

   311

		/* Clear the landscape at the tiles */

   312

		{

   313

			int count;

   314

			TileIndex *ti = ts.tile_table;

   315

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

   316

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

   317

			}

   318

		}

   319

   320

		/* change the height */

   321

		{

   322

			int count;

   323

			TerraformerHeightMod *mod;

   324

   325

			mod = ts.modheight;

   326

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

   327

				TileIndex til = mod->tile;

   328

   329

				SetTileHeight(til, mod->height);

   330

				TerraformAddDirtyTileAround(&ts, til);

   331

			}

   332

		}

   333

   334

		/* finally mark the dirty tiles dirty */

   335

		{

   336

			int count;

   337

			TileIndex *ti = ts.tile_table;

   338

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

   339

				MarkTileDirtyByTile(*ti);

   340

			}

   341

		}

   342

	}

   343

	return ts.cost;

   344

}

   345

   346

   347

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

   348

 * @param tile end tile of area-drag

   349

 * @param p1 start tile of area drag

   350

 * @param p2 unused

   351

 */

   352

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

   353

{

   354

	int size_x, size_y;

   355

	int ex;

   356

	int ey;

   357

	int sx, sy;

   358

	uint h, curh;

   359

	int32 ret, cost, money;

   360

   361

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

   362

   363

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   364

   365

	// remember level height

   366

	h = TileHeight(p1);

   367

   368

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

   369

	ex = TileX(tile);

   370

	ey = TileY(tile);

   371

	sx = TileX(p1);

   372

	sy = TileY(p1);

   373

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

   374

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

   375

	tile = TileXY(sx, sy);

   376

   377

	size_x = ex-sx+1;

   378

	size_y = ey-sy+1;

   379

   380

	money = GetAvailableMoneyForCommand();

   381

	cost = 0;

   382

   383

	BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {

   384

		curh = TileHeight(tile2);

   385

		while (curh != h) {

   386

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

   387

			if (CmdFailed(ret)) break;

   388

			cost += ret;

   389

   390

			if (flags & DC_EXEC) {

   391

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

   392

					_additional_cash_required = ret;

   393

					return cost - ret;

   394

				}

   395

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

   396

			}

   397

   398

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

   399

		}

   400

	} END_TILE_LOOP(tile2, size_x, size_y, tile)

   401

   402

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

   403

}

   404

   405

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

   406

 * the name is a bit confusing ;p

   407

 * @param tile the tile the player is purchasing

   408

 * @param p1 unused

   409

 * @param p2 unused

   410

 */

   411

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

   412

{

   413

	int32 cost;

   414

   415

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   416

   417

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   418

   419

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

   420

		return_cmd_error(STR_5807_YOU_ALREADY_OWN_IT);

   421

	}

   422

   423

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

   424

	if (CmdFailed(cost)) return CMD_ERROR;

   425

   426

	if (flags & DC_EXEC) {

   427

		MakeOwnedLand(tile, _current_player);

   428

		MarkTileDirtyByTile(tile);

   429

	}

   430

   431

	return cost + _price.purchase_land * 10;

   432

}

   433

   434

   435

static int32 ClearTile_Clear(TileIndex tile, byte flags)

   436

{

   437

	static const int32* clear_price_table[] = {

   438

		&_price.clear_1,

   439

		&_price.purchase_land,

   440

		&_price.clear_2,

   441

		&_price.clear_3,

   442

		&_price.purchase_land,

   443

		&_price.purchase_land,

   444

		&_price.clear_2, // XXX unused?

   445

	};

   446

	int32 price;

   447

   448

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

   449

		price = 0;

   450

	} else {

   451

		price = *clear_price_table[GetClearGround(tile)];

   452

	}

   453

   454

	if (flags & DC_EXEC) DoClearSquare(tile);

   455

   456

	return price;

   457

}

   458

   459

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

   460

 * the name is a bit confusing ;p

   461

 * @param tile the tile the player is selling

   462

 * @param p1 unused

   463

 * @param p2 unused

   464

 */

   465

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

   466

{

   467

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   468

   469

	if (!IsOwnedLandTile(tile)) return CMD_ERROR;

   470

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

   471

   472

   473

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   474

   475

	if (flags & DC_EXEC) DoClearSquare(tile);

   476

   477

	return - _price.purchase_land * 2;

   478

}

   479

   480

   481

#include "table/clear_land.h"

   482

   483

   484

void DrawClearLandTile(const TileInfo *ti, byte set)

   485

{

   486

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

   487

}

   488

   489

void DrawHillyLandTile(const TileInfo *ti)

   490

{

   491

	if (ti->tileh != SLOPE_FLAT) {

   492

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

   493

	} else {

   494

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

   495

	}

   496

}

   497

   498

void DrawClearLandFence(const TileInfo *ti)