1

/* $Id$ */

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     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear_map.h"

     6

#include "functions.h"

     7

#include "map.h"

     8

#include "player.h"

     9

#include "spritecache.h"

    10

#include "table/sprites.h"

    11

#include "tile.h"

    12

#include <stdarg.h>

    13

#include "viewport.h"

    14

#include "command.h"

    15

#include "vehicle.h"

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#include "variables.h"

    17

#include "void_map.h"

    18

#include "water_map.h"

    19

    20

extern const TileTypeProcs

    21

	_tile_type_clear_procs,

    22

	_tile_type_rail_procs,

    23

	_tile_type_road_procs,

    24

	_tile_type_town_procs,

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	_tile_type_trees_procs,

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	_tile_type_station_procs,

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	_tile_type_water_procs,

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	_tile_type_dummy_procs,

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	_tile_type_industry_procs,

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	_tile_type_tunnelbridge_procs,

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	_tile_type_unmovable_procs;

    32

    33

const TileTypeProcs * const _tile_type_procs[16] = {

    34

	&_tile_type_clear_procs,

    35

	&_tile_type_rail_procs,

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	&_tile_type_road_procs,

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	&_tile_type_town_procs,

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	&_tile_type_trees_procs,

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	&_tile_type_station_procs,

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	&_tile_type_water_procs,

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	&_tile_type_dummy_procs,

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	&_tile_type_industry_procs,

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	&_tile_type_tunnelbridge_procs,

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	&_tile_type_unmovable_procs,

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};

    46

    47

/* landscape slope => sprite */

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const byte _tileh_to_sprite[32] = {

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	0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,0,

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	0,0,0,0,0,0,0,16,0,0,0,17,0,15,18,0,

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};

    52

    53

const byte _inclined_tileh[] = {

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	SLOPE_SW, SLOPE_NW, SLOPE_SW, SLOPE_SE, SLOPE_NE, SLOPE_SE, SLOPE_NE, SLOPE_NW

    55

};

    56

    57

    58

/* find the landscape height for the coordinates x y */

    59

void FindLandscapeHeight(TileInfo *ti, uint x, uint y)

    60

{

    61

	ti->x = x;

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	ti->y = y;

    63

    64

	if (x >= MapMaxX() * TILE_SIZE - 1 || y >= MapMaxY() * TILE_SIZE - 1) {

    65

		ti->tileh = SLOPE_FLAT;

    66

		ti->type = MP_VOID;

    67

		ti->tile = 0;

    68

		ti->z = 0;

    69

	} else {

    70

		TileIndex tile = TileVirtXY(x, y);

    71

    72

		ti->tile = tile;

    73

		ti->type = GetTileType(tile);

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		ti->tileh = GetTileSlope(tile, &ti->z);

    75

	}

    76

}

    77

    78

uint GetPartialZ(int x, int y, Slope corners)

    79

{

    80

	int z = 0;

    81

    82

	switch (corners) {

    83

	case SLOPE_W:

    84

		if (x - y >= 0)

    85

			z = (x - y) >> 1;

    86

		break;

    87

    88

	case SLOPE_S:

    89

		y^=0xF;

    90

		if ( (x - y) >= 0)

    91

			z = (x - y) >> 1;

    92

		break;

    93

    94

	case SLOPE_SW:

    95

		z = (x>>1) + 1;

    96

		break;

    97

    98

	case SLOPE_E:

    99

		if (y - x >= 0)

   100

			z = (y - x) >> 1;

   101

		break;

   102

   103

	case SLOPE_EW:

   104

	case SLOPE_NS:

   105

	case SLOPE_ELEVATED:

   106

		z = 4;

   107

		break;

   108

   109

	case SLOPE_SE:

   110

		z = (y>>1) + 1;

   111

		break;

   112

   113

	case SLOPE_WSE:

   114

		z = 8;

   115

		y^=0xF;

   116

		if (x - y < 0)

   117

			z += (x - y) >> 1;

   118

		break;

   119

   120

	case SLOPE_N:

   121

		y ^= 0xF;

   122

		if (y - x >= 0)

   123

			z = (y - x) >> 1;

   124

		break;

   125

   126

	case SLOPE_NW:

   127

		z = (y^0xF)>>1;

   128

		break;

   129

   130

	case SLOPE_NWS:

   131

		z = 8;

   132

		if (x - y < 0)

   133

			z += (x - y) >> 1;

   134

		break;

   135

   136

	case SLOPE_NE:

   137

		z = (x^0xF)>>1;

   138

		break;

   139

   140

	case SLOPE_ENW:

   141

		z = 8;

   142

		y ^= 0xF;

   143

		if (y - x < 0)

   144

			z += (y - x) >> 1;

   145

		break;

   146

   147

	case SLOPE_SEN:

   148

		z = 8;

   149

		if (y - x < 0)

   150

			z += (y - x) >> 1;

   151

		break;

   152

   153

	case SLOPE_STEEP_S:

   154

		z = 1 + ((x+y)>>1);

   155

		break;

   156

   157

	case SLOPE_STEEP_W:

   158

		z = 1 + ((x+(y^0xF))>>1);

   159

		break;

   160

   161

	case SLOPE_STEEP_N:

   162

		z = 1 + (((x^0xF)+(y^0xF))>>1);

   163

		break;

   164

   165

	case SLOPE_STEEP_E:

   166

		z = 1 + (((x^0xF)+(y^0xF))>>1);

   167

		break;

   168

   169

		default: break;

   170

	}

   171

   172

	return z;

   173

}

   174

   175

uint GetSlopeZ(int x, int y)

   176

{

   177

	TileInfo ti;

   178

   179

	FindLandscapeHeight(&ti, x, y);

   180

   181

	return _tile_type_procs[ti.type]->get_slope_z_proc(&ti);

   182

}

   183

   184

// direction=true:  check for foundation in east and south corner

   185

// direction=false: check for foundation in west and south corner

   186

static bool HasFoundation(TileIndex tile, bool direction)

   187

{

   188

	bool south, other; // southern corner and east/west corner

   189

	Slope tileh = GetTileSlope(tile, NULL);

   190

	Slope slope = _tile_type_procs[GetTileType(tile)]->get_slope_tileh_proc(tile, tileh);

   191

   192

	if (slope == SLOPE_FLAT && slope != tileh) tileh = SLOPE_ELEVATED;

   193

	south = (tileh & SLOPE_S) != (slope & SLOPE_S);

   194

   195

	if (direction) {

   196

		other = (tileh & SLOPE_E) != (slope & SLOPE_E);

   197

	} else {

   198

		other = (tileh & SLOPE_W) != (slope & SLOPE_W);

   199

	}

   200

	return south || other;

   201

}

   202

   203

void DrawFoundation(TileInfo *ti, uint f)

   204

{

   205

	uint32 sprite_base = SPR_SLOPES_BASE-14;

   206

   207

	if (HasFoundation(TILE_ADDXY(ti->tile, 0, -1), true)) sprite_base += 22; // foundation in NW direction

   208

	if (HasFoundation(TILE_ADDXY(ti->tile, -1, 0), false)) sprite_base += 44; // foundation in NE direction

   209

   210

	if (f < 15) {

   211

		// leveled foundation

   212

		if (sprite_base < SPR_SLOPES_BASE) sprite_base = SPR_FOUNDATION_BASE + 1; // use original slope sprites

   213

   214

		AddSortableSpriteToDraw(f - 1 + sprite_base, ti->x, ti->y, 16, 16, 7, ti->z);

   215

		ti->z += TILE_HEIGHT;

   216

		ti->tileh = SLOPE_FLAT;

   217

		OffsetGroundSprite(31, 1);

   218

	} else {

   219

		// inclined foundation

   220

		sprite_base += 14;

   221

   222

#define M(x) (1 << (x))

   223

		AddSortableSpriteToDraw(

   224

			HASBIT(M(SLOPE_W) | M(SLOPE_S) | M(SLOPE_E) | M(SLOPE_N), ti->tileh) ?

   225

				sprite_base + (f - 15) : SPR_FOUNDATION_BASE + ti->tileh,

   226

			ti->x, ti->y, 1, 1, 1, ti->z

   227

		);

   228

#undef M

   229

   230

		ti->tileh = _inclined_tileh[f - 15];

   231

		OffsetGroundSprite(31, 9);

   232

	}

   233

}

   234

   235

void DoClearSquare(TileIndex tile)

   236

{

   237

	MakeClear(tile, CLEAR_GRASS, _generating_world ? 3 : 0);

   238

	MarkTileDirtyByTile(tile);

   239

}

   240

   241

uint32 GetTileTrackStatus(TileIndex tile, TransportType mode)

   242

{

   243

	return _tile_type_procs[GetTileType(tile)]->get_tile_track_status_proc(tile, mode);

   244

}

   245

   246

void ChangeTileOwner(TileIndex tile, byte old_player, byte new_player)

   247

{

   248

	_tile_type_procs[GetTileType(tile)]->change_tile_owner_proc(tile, old_player, new_player);

   249

}

   250

   251

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   252

{

   253

	memset(ac, 0, sizeof(AcceptedCargo));

   254

	_tile_type_procs[GetTileType(tile)]->get_accepted_cargo_proc(tile, ac);

   255

}

   256

   257

void AnimateTile(TileIndex tile)

   258

{

   259

	_tile_type_procs[GetTileType(tile)]->animate_tile_proc(tile);

   260

}

   261

   262

void ClickTile(TileIndex tile)

   263

{

   264

	_tile_type_procs[GetTileType(tile)]->click_tile_proc(tile);

   265

}

   266

   267

void DrawTile(TileInfo *ti)

   268

{

   269

	_tile_type_procs[ti->type]->draw_tile_proc(ti);

   270

}

   271

   272

void GetTileDesc(TileIndex tile, TileDesc *td)

   273

{

   274

	_tile_type_procs[GetTileType(tile)]->get_tile_desc_proc(tile, td);

   275

}

   276

   277

/** Clear a piece of landscape

   278

 * @param tile tile to clear

   279

 * @param p1 unused

   280

 * @param p2 unused

   281

 */

   282

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

   283

{

   284

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   285

   286

	return _tile_type_procs[GetTileType(tile)]->clear_tile_proc(tile, flags);

   287

}

   288

   289

/** Clear a big piece of landscape

   290

 * @param tile end tile of area dragging

   291

 * @param p1 start tile of area dragging

   292

 * @param p2 unused

   293

 */

   294

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

   295

{

   296

	int32 cost, ret, money;

   297

	int ex;

   298

	int ey;

   299

	int sx,sy;

   300

	int x,y;

   301

	bool success = false;

   302

   303

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

   304

   305

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   306

   307

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

   308

	ex = TileX(tile);

   309

	ey = TileY(tile);

   310

	sx = TileX(p1);

   311

	sy = TileY(p1);

   312

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

   313

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

   314

   315

	money = GetAvailableMoneyForCommand();

   316

	cost = 0;

   317

   318

	for (x = sx; x <= ex; ++x) {

   319

		for (y = sy; y <= ey; ++y) {

   320

			ret = DoCommand(TileXY(x, y), 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR);

   321

			if (CmdFailed(ret)) continue;

   322

			cost += ret;

   323

			success = true;

   324

   325

			if (flags & DC_EXEC) {

   326

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

   327

					_additional_cash_required = ret;

   328

					return cost - ret;

   329

				}

   330

				DoCommand(TileXY(x, y), 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   331

   332

				// draw explosion animation...

   333

				if ((x == sx || x == ex) && (y == sy || y == ey)) {

   334

					// big explosion in each corner, or small explosion for single tiles

   335

					CreateEffectVehicleAbove(x * TILE_SIZE + TILE_SIZE / 2, y * TILE_SIZE + TILE_SIZE / 2, 2,

   336

						sy == ey && sx == ex ? EV_EXPLOSION_SMALL : EV_EXPLOSION_LARGE

   337

					);

   338

				}

   339

			}

   340

		}

   341

	}

   342

   343

	return (success) ? cost : CMD_ERROR;

   344

}

   345

   346

   347

#define TILELOOP_BITS 4

   348

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   349

#define TILELOOP_ASSERTMASK ((TILELOOP_SIZE-1) + ((TILELOOP_SIZE-1) << MapLogX()))

   350

#define TILELOOP_CHKMASK (((1 << (MapLogX() - TILELOOP_BITS))-1) << TILELOOP_BITS)

   351

   352

void RunTileLoop(void)

   353

{

   354

	TileIndex tile;

   355

	uint count;

   356

   357

	tile = _cur_tileloop_tile;

   358

   359

	assert( (tile & ~TILELOOP_ASSERTMASK) == 0);

   360

	count = (MapSizeX() / TILELOOP_SIZE) * (MapSizeY() / TILELOOP_SIZE);

   361

	do {

   362

		_tile_type_procs[GetTileType(tile)]->tile_loop_proc(tile);

   363

   364

		if (TileX(tile) < MapSizeX() - TILELOOP_SIZE) {

   365

			tile += TILELOOP_SIZE; /* no overflow */

   366

		} else {

   367

			tile = TILE_MASK(tile - TILELOOP_SIZE * (MapSizeX() / TILELOOP_SIZE - 1) + TileDiffXY(0, TILELOOP_SIZE)); /* x would overflow, also increase y */

   368

		}

   369

	} while (--count);

   370

	assert( (tile & ~TILELOOP_ASSERTMASK) == 0);

   371

   372

	tile += 9;

   373

	if (tile & TILELOOP_CHKMASK)

   374

		tile = (tile + MapSizeX()) & TILELOOP_ASSERTMASK;

   375

	_cur_tileloop_tile = tile;

   376

}

   377

   378

void InitializeLandscape(void)

   379

{

   380

	uint maxx = MapMaxX();

   381

	uint maxy = MapMaxY();

   382

	uint sizex = MapSizeX();

   383

	uint x;

   384

	uint y;

   385

   386

	for (y = 0; y < maxy; y++) {

   387

		for (x = 0; x < maxx; x++) {

   388

			MakeClear(sizex * y + x, CLEAR_GRASS, 3);

   389

			SetTileHeight(sizex * y + x, 0);

   390

		}

   391

		MakeVoid(sizex * y + x);

   392

	}

   393

	for (x = 0; x < sizex; x++) MakeVoid(sizex * y + x);

   394

}

   395

   396

void ConvertGroundTilesIntoWaterTiles(void)

   397

{

   398

	TileIndex tile = 0;

   399

   400

	for (tile = 0; tile < MapSize(); ++tile) {

   401

		if (IsTileType(tile, MP_CLEAR) && GetTileMaxZ(tile) == 0) {

   402

			MakeWater(tile);

   403

		}

   404

	}

   405

}

   406

   407

static const byte _genterrain_tbl_1[5] = { 10, 22, 33, 37, 4 };

   408

static const byte _genterrain_tbl_2[5] = { 0, 0, 0, 0, 33 };

   409

   410

static void GenerateTerrain(int type, int flag)

   411

{

   412

	uint32 r;

   413

	uint x;

   414

	uint y;

   415

	uint w;

   416

	uint h;

   417

	const Sprite* template;

   418

	const byte *p;

   419

	Tile* tile;

   420

	byte direction;

   421

   422

	r = Random();

   423

	template = GetSprite((((r >> 24) * _genterrain_tbl_1[type]) >> 8) + _genterrain_tbl_2[type] + 4845);

   424

   425

	x = r & MapMaxX();

   426

	y = (r >> MapLogX()) & MapMaxY();

   427

   428

   429

	if (x < 2 || y < 2) return;

   430

   431

	direction = GB(r, 22, 2);

   432

	if (direction & 1) {

   433

		w = template->height;

   434

		h = template->width;

   435

	} else {

   436

		w = template->width;

   437

		h = template->height;

   438

	}

   439

	p = template->data;

   440

   441

	if (flag & 4) {

   442

		uint xw = x * MapSizeY();

   443

		uint yw = y * MapSizeX();

   444

		uint bias = (MapSizeX() + MapSizeY()) * 16;

   445

   446

		switch (flag & 3) {

   447

			case 0:

   448

				if (xw + yw > MapSize() - bias) return;

   449

				break;

   450

   451

			case 1:

   452

				if (yw < xw + bias) return;

   453

				break;

   454

   455

			case 2:

   456

				if (xw + yw < MapSize() + bias) return;

   457

				break;

   458

   459

			case 3:

   460

				if (xw < yw + bias) return;

   461

				break;

   462

		}

   463

	}

   464

   465

	if (x + w >= MapMaxX() - 1) return;

   466

	if (y + h >= MapMaxY() - 1) return;

   467

   468

	tile = &_m[TileXY(x, y)];

   469

   470

	switch (direction) {

   471

		case 0:

   472

			do {

   473

				Tile* tile_cur = tile;

   474

				uint w_cur;

   475

   476

				for (w_cur = w; w_cur != 0; --w_cur) {

   477

					if (*p >= tile_cur->type_height) tile_cur->type_height = *p;

   478

					p++;

   479

					tile_cur++;

   480

				}

   481

				tile += TileDiffXY(0, 1);

   482

			} while (--h != 0);

   483

			break;

   484

   485

		case 1:

   486

			do {

   487

				Tile* tile_cur = tile;

   488

				uint h_cur;

   489

   490

				for (h_cur = h; h_cur != 0; --h_cur) {

   491

					if (*p >= tile_cur->type_height) tile_cur->type_height = *p;

   492

					p++;

   493

					tile_cur += TileDiffXY(0, 1);

   494

				}

   495

				tile++;

   496

			} while (--w != 0);

   497

			break;