1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear.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"

    16

#include "variables.h"

    17

    18

extern const TileTypeProcs

    19

	_tile_type_clear_procs,

    20

	_tile_type_rail_procs,

    21

	_tile_type_road_procs,

    22

	_tile_type_town_procs,

    23

	_tile_type_trees_procs,

    24

	_tile_type_station_procs,

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	_tile_type_water_procs,

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	_tile_type_dummy_procs,

    27

	_tile_type_industry_procs,

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	_tile_type_tunnelbridge_procs,

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	_tile_type_unmovable_procs;

    30

    31

const TileTypeProcs * const _tile_type_procs[16] = {

    32

	&_tile_type_clear_procs,

    33

	&_tile_type_rail_procs,

    34

	&_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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};

    44

    45

/* 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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};

    50

    51

const byte _inclined_tileh[] = {

    52

	3, 9, 3, 6, 12, 6, 12, 9

    53

};

    54

    55

    56

void FindLandscapeHeightByTile(TileInfo *ti, TileIndex tile)

    57

{

    58

	assert(tile < MapSize());

    59

    60

	ti->tile = tile;

    61

	ti->map5 = _m[tile].m5;

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	ti->type = GetTileType(tile);

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

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}

    65

    66

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

    67

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

    68

{

    69

	ti->x = x;

    70

	ti->y = y;

    71

    72

	if (x >= MapMaxX() * 16 - 1 || y >= MapMaxY() * 16 - 1) {

    73

		ti->tileh = 0;

    74

		ti->type = MP_VOID;

    75

		ti->tile = 0;

    76

		ti->map5 = 0;

    77

		ti->z = 0;

    78

		return;

    79

	}

    80

    81

	FindLandscapeHeightByTile(ti, TileVirtXY(x, y));

    82

}

    83

    84

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

    85

{

    86

	int z = 0;

    87

    88

	switch (corners) {

    89

	case 1:

    90

		if (x - y >= 0)

    91

			z = (x - y) >> 1;

    92

		break;

    93

    94

	case 2:

    95

		y^=0xF;

    96

		if ( (x - y) >= 0)

    97

			z = (x - y) >> 1;

    98

		break;

    99

   100

	case 3:

   101

		z = (x>>1) + 1;

   102

		break;

   103

   104

	case 4:

   105

		if (y - x >= 0)

   106

			z = (y - x) >> 1;

   107

		break;

   108

   109

	case 5:

   110

	case 10:

   111

	case 15:

   112

		z = 4;

   113

		break;

   114

   115

	case 6:

   116

		z = (y>>1) + 1;

   117

		break;

   118

   119

	case 7:

   120

		z = 8;

   121

		y^=0xF;

   122

		if (x - y < 0)

   123

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

   124

		break;

   125

   126

	case 8:

   127

		y ^= 0xF;

   128

		if (y - x >= 0)

   129

			z = (y - x) >> 1;

   130

		break;

   131

   132

	case 9:

   133

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

   134

		break;

   135

   136

	case 11:

   137

		z = 8;

   138

		if (x - y < 0)

   139

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

   140

		break;

   141

   142

	case 12:

   143

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

   144

		break;

   145

   146

	case 13:

   147

		z = 8;

   148

		y ^= 0xF;

   149

		if (y - x < 0)

   150

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

   151

		break;

   152

   153

	case 14:

   154

		z = 8;

   155

		if (y - x < 0)

   156

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

   157

		break;

   158

   159

	case 23:

   160

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

   161

		break;

   162

   163

	case 27:

   164

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

   165

		break;

   166

   167

	case 29:

   168

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

   169

		break;

   170

   171

	case 30:

   172

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

   173

		break;

   174

	}

   175

   176

	return z;

   177

}

   178

   179

uint GetSlopeZ(int x, int y)

   180

{

   181

	TileInfo ti;

   182

   183

	FindLandscapeHeight(&ti, x, y);

   184

   185

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

   186

}

   187

   188

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

   189

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

   190

static bool hasFoundation(const TileInfo* ti, bool direction)

   191

{

   192

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

   193

	uint slope = _tile_type_procs[ti->type]->get_slope_tileh_proc(ti);

   194

	uint tileh = ti->tileh;

   195

   196

	if (slope == 0 && slope != tileh) tileh = 15;

   197

	south = (tileh & 2) != (slope & 2);

   198

   199

	if (direction) {

   200

		other = (tileh & 4) != (slope & 4);

   201

	} else {

   202

		other = (tileh & 1) != (slope & 1);

   203

	}

   204

	return south || other;

   205

}

   206

   207

void DrawFoundation(TileInfo *ti, uint f)

   208

{

   209

	uint32 sprite_base = SPR_SLOPES_BASE-14;

   210

   211

	TileInfo ti2;

   212

	FindLandscapeHeight(&ti2, ti->x, ti->y - 1);

   213

	if (hasFoundation(&ti2, true)) sprite_base += 22;		// foundation in NW direction

   214

	FindLandscapeHeight(&ti2, ti->x - 1, ti->y);

   215

	if (hasFoundation(&ti2, false)) sprite_base += 22 * 2;	// foundation in NE direction

   216

   217

	if (f < 15) {

   218

		// leveled foundation

   219

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

   220

   221

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

   222

		ti->z += 8;

   223

		ti->tileh = 0;

   224

		OffsetGroundSprite(31, 1);

   225

	} else {

   226

		// inclined foundation

   227

		sprite_base += 14;

   228

   229

		AddSortableSpriteToDraw(

   230

			HASBIT((1<<1) | (1<<2) | (1<<4) | (1<<8), ti->tileh) ? sprite_base + (f - 15) : SPR_FOUNDATION_BASE + ti->tileh,

   231

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

   232

		);

   233

   234

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

   235

		OffsetGroundSprite(31, 9);

   236

	}

   237

}

   238

   239

void DoClearSquare(TileIndex tile)

   240

{

   241

	SetTileType(tile, MP_CLEAR);

   242

	SetTileOwner(tile, OWNER_NONE);

   243

	_m[tile].m2 = 0;

   244

	_m[tile].m3 = 0;

   245

	_m[tile].m4 = 0;

   246

	SetClearGroundDensity(tile, CL_GRASS, _generating_world ? 3 : 0);

   247

	MarkTileDirtyByTile(tile);

   248

}

   249

   250

uint32 GetTileTrackStatus(TileIndex tile, TransportType mode)

   251

{

   252

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

   253

}

   254

   255

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

   256

{

   257

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

   258

}

   259

   260

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   261

{

   262

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

   263

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

   264

}

   265

   266

void AnimateTile(TileIndex tile)

   267

{

   268

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

   269

}

   270

   271

void ClickTile(TileIndex tile)

   272

{

   273

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

   274

}

   275

   276

void DrawTile(TileInfo *ti)

   277

{

   278

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

   279

}

   280

   281

void GetTileDesc(TileIndex tile, TileDesc *td)

   282

{

   283

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

   284

}

   285

   286

/** Clear a piece of landscape

   287

 * @param x,y coordinates of clearance

   288

 * @param p1 unused

   289

 * @param p2 unused

   290

 */

   291

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

   292

{

   293

	TileIndex tile = TileVirtXY(x, y);

   294

   295

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   296

   297

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

   298

}

   299

   300

/** Clear a big piece of landscape

   301

 * @param x,y end coordinates of area dragging

   302

 * @param p1 start tile of area dragging

   303

 * @param p2 unused

   304

 */

   305

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

   306

{

   307

	int32 cost, ret, money;

   308

	int sx,sy;

   309

	int x,y;

   310

	bool success = false;

   311

   312

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

   313

   314

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   315

   316

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

   317

	sx = TileX(p1) * 16;

   318

	sy = TileY(p1) * 16;

   319

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

   320

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

   321

   322

	money = GetAvailableMoneyForCommand();

   323

	cost = 0;

   324

   325

	for (x = sx; x <= ex; x += 16) {

   326

		for (y = sy; y <= ey; y += 16) {

   327

			ret = DoCommandByTile(TileVirtXY(x, y), 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR);

   328

			if (CmdFailed(ret)) continue;

   329

			cost += ret;

   330

			success = true;

   331

   332

			if (flags & DC_EXEC) {

   333

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

   334

					_additional_cash_required = ret;

   335

					return cost - ret;

   336

				}

   337

				DoCommandByTile(TileVirtXY(x, y), 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   338

   339

				// draw explosion animation...

   340

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

   341

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

   342

					CreateEffectVehicleAbove(x + 8, y + 8, 2,

   343

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

   344

					);

   345

				}

   346

			}

   347

		}

   348

	}

   349

   350

	return (success) ? cost : CMD_ERROR;

   351

}

   352

   353

   354

/* utility function used to modify a tile */

   355

void CDECL ModifyTile(TileIndex tile, uint flags, ...)

   356

{

   357

	va_list va;

   358

	int i;

   359

   360

	va_start(va, flags);

   361

   362

	if ((i = GB(flags, 8, 4)) != 0) {

   363

		SetTileType(tile, i - 1);

   364

	}

   365

   366

	if (flags & (MP_MAP2_CLEAR | MP_MAP2)) {

   367

		int x = 0;

   368

		if (flags & MP_MAP2) x = va_arg(va, int);

   369

		_m[tile].m2 = x;

   370

	}

   371

   372

	if (flags & (MP_MAP3LO_CLEAR | MP_MAP3LO)) {

   373

		int x = 0;

   374

		if (flags & MP_MAP3LO) x = va_arg(va, int);

   375

		_m[tile].m3 = x;

   376

	}

   377

   378

	if (flags & (MP_MAP3HI_CLEAR | MP_MAP3HI)) {

   379

		int x = 0;

   380

		if (flags & MP_MAP3HI) x = va_arg(va, int);

   381

		_m[tile].m4 = x;

   382

	}

   383

   384

	if (flags & (MP_MAPOWNER|MP_MAPOWNER_CURRENT)) {

   385

		PlayerID x = _current_player;

   386

		if (flags & MP_MAPOWNER) x = va_arg(va, int);

   387

		_m[tile].m1 = x;

   388

	}

   389

   390

	if (flags & MP_MAP5) {

   391

		_m[tile].m5 = va_arg(va, int);

   392

	}

   393

   394

	va_end(va);

   395

   396

	if (!(flags & MP_NODIRTY))

   397

		MarkTileDirtyByTile(tile);

   398

}

   399

   400

   401

#define TILELOOP_BITS 4

   402

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   403

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

   404

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

   405

   406

void RunTileLoop(void)

   407

{

   408

	TileIndex tile;

   409

	uint count;

   410

   411

	tile = _cur_tileloop_tile;

   412

   413

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

   414

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

   415

	do {

   416

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

   417

   418

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

   419

			tile += TILELOOP_SIZE; /* no overflow */

   420

		} else {

   421

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

   422

		}

   423

	} while (--count);

   424

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

   425

   426

	tile += 9;

   427

	if (tile & TILELOOP_CHKMASK)

   428

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

   429

	_cur_tileloop_tile = tile;

   430

}

   431

   432

void InitializeLandscape(void)

   433

{

   434

	uint map_size;

   435

	uint i;

   436

   437

   438

	map_size = MapSize();

   439

	for (i = 0; i < map_size; i++) {

   440

		_m[i].type_height = MP_CLEAR << 4;

   441

		_m[i].m1          = OWNER_NONE;

   442

		_m[i].m2          = 0;

   443

		_m[i].m3          = 0;

   444

		_m[i].m4          = 0;

   445

		_m[i].m5          = 3;

   446

		_m[i].extra       = 0;

   447

	}

   448

   449

	// create void tiles at the border

   450

	for (i = 0; i < MapMaxY(); ++i)

   451

		SetTileType(i * MapSizeX() + MapMaxX(), MP_VOID);

   452

	for (i = 0; i < MapSizeX(); ++i)

   453

		SetTileType(MapSizeX() * MapMaxY() + i, MP_VOID);

   454

}

   455

   456

void ConvertGroundTilesIntoWaterTiles(void)

   457

{

   458

	TileIndex tile = 0;

   459

	uint h;

   460

   461

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

   462

		if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == 0 && h == 0) {

   463

			SetTileType(tile, MP_WATER);

   464

			SetTileOwner(tile, OWNER_WATER);

   465

			_m[tile].m5 = 0;

   466

		}

   467

	}

   468

}

   469

   470

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

   471

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

   472

   473

static void GenerateTerrain(int type, int flag)

   474

{

   475

	uint32 r;

   476

	uint x;

   477

	uint y;

   478

	uint w;

   479

	uint h;

   480

	const Sprite* template;

   481

	const byte *p;

   482

	Tile* tile;

   483

	byte direction;

   484

   485

	r = Random();

   486

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

   487

   488

	x = r & MapMaxX();

   489

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

   490

   491

   492

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

   493

   494

	direction = GB(r, 22, 2);

   495

	if (direction & 1) {

   496

		w = template->height;

   497

		h = template->width;

   498

	} else {

   499

		w = template->width;

   500

		h = template->height;

   501

	}

   502

	p = template->data;

   503

   504

	if (flag & 4) {