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

#include "void.h"

    18

    19

extern const TileTypeProcs

    20

	_tile_type_clear_procs,

    21

	_tile_type_rail_procs,

    22

	_tile_type_road_procs,

    23

	_tile_type_town_procs,

    24

	_tile_type_trees_procs,

    25

	_tile_type_station_procs,

    26

	_tile_type_water_procs,

    27

	_tile_type_dummy_procs,

    28

	_tile_type_industry_procs,

    29

	_tile_type_tunnelbridge_procs,

    30

	_tile_type_unmovable_procs;

    31

    32

const TileTypeProcs * const _tile_type_procs[16] = {

    33

	&_tile_type_clear_procs,

    34

	&_tile_type_rail_procs,

    35

	&_tile_type_road_procs,

    36

	&_tile_type_town_procs,

    37

	&_tile_type_trees_procs,

    38

	&_tile_type_station_procs,

    39

	&_tile_type_water_procs,

    40

	&_tile_type_dummy_procs,

    41

	&_tile_type_industry_procs,

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	&_tile_type_tunnelbridge_procs,

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	&_tile_type_unmovable_procs,

    44

};

    45

    46

/* landscape slope => sprite */

    47

const byte _tileh_to_sprite[32] = {

    48

	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,

    50

};

    51

    52

const byte _inclined_tileh[] = {

    53

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

    54

};

    55

    56

    57

void FindLandscapeHeightByTile(TileInfo *ti, TileIndex tile)

    58

{

    59

	assert(tile < MapSize());

    60

    61

	ti->tile = tile;

    62

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

    63

	ti->type = GetTileType(tile);

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

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}

    66

    67

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

    68

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

    69

{

    70

	ti->x = x;

    71

	ti->y = y;

    72

    73

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

    74

		ti->tileh = 0;

    75

		ti->type = MP_VOID;

    76

		ti->tile = 0;

    77

		ti->map5 = 0;

    78

		ti->z = 0;

    79

		return;

    80

	}

    81

    82

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

    83

}

    84

    85

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

    86

{

    87

	int z = 0;

    88

    89

	switch (corners) {

    90

	case 1:

    91

		if (x - y >= 0)

    92

			z = (x - y) >> 1;

    93

		break;

    94

    95

	case 2:

    96

		y^=0xF;

    97

		if ( (x - y) >= 0)

    98

			z = (x - y) >> 1;

    99

		break;

   100

   101

	case 3:

   102

		z = (x>>1) + 1;

   103

		break;

   104

   105

	case 4:

   106

		if (y - x >= 0)

   107

			z = (y - x) >> 1;

   108

		break;

   109

   110

	case 5:

   111

	case 10:

   112

	case 15:

   113

		z = 4;

   114

		break;

   115

   116

	case 6:

   117

		z = (y>>1) + 1;

   118

		break;

   119

   120

	case 7:

   121

		z = 8;

   122

		y^=0xF;

   123

		if (x - y < 0)

   124

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

   125

		break;

   126

   127

	case 8:

   128

		y ^= 0xF;

   129

		if (y - x >= 0)

   130

			z = (y - x) >> 1;

   131

		break;

   132

   133

	case 9:

   134

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

   135

		break;

   136

   137

	case 11:

   138

		z = 8;

   139

		if (x - y < 0)

   140

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

   141

		break;

   142

   143

	case 12:

   144

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

   145

		break;

   146

   147

	case 13:

   148

		z = 8;

   149

		y ^= 0xF;

   150

		if (y - x < 0)

   151

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

   152

		break;

   153

   154

	case 14:

   155

		z = 8;

   156

		if (y - x < 0)

   157

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

   158

		break;

   159

   160

	case 23:

   161

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

   162

		break;

   163

   164

	case 27:

   165

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

   166

		break;

   167

   168

	case 29:

   169

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

   170

		break;

   171

   172

	case 30:

   173

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

   174

		break;

   175

	}

   176

   177

	return z;

   178

}

   179

   180

uint GetSlopeZ(int x, int y)

   181

{

   182

	TileInfo ti;

   183

   184

	FindLandscapeHeight(&ti, x, y);

   185

   186

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

   187

}

   188

   189

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

   190

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

   191

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

   192

{

   193

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

   194

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

   195

	uint tileh = ti->tileh;

   196

   197

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

   198

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

   199

   200

	if (direction) {

   201

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

   202

	} else {

   203

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

   204

	}

   205

	return south || other;

   206

}

   207

   208

void DrawFoundation(TileInfo *ti, uint f)

   209

{

   210

	uint32 sprite_base = SPR_SLOPES_BASE-14;

   211

   212

	TileInfo ti2;

   213

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

   214

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

   215

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

   216

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

   217

   218

	if (f < 15) {

   219

		// leveled foundation

   220

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

   221

   222

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

   223

		ti->z += 8;

   224

		ti->tileh = 0;

   225

		OffsetGroundSprite(31, 1);

   226

	} else {

   227

		// inclined foundation

   228

		sprite_base += 14;

   229

   230

		AddSortableSpriteToDraw(

   231

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

   232

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

   233

		);

   234

   235

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

   236

		OffsetGroundSprite(31, 9);

   237

	}

   238

}

   239

   240

void DoClearSquare(TileIndex tile)

   241

{

   242

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

   243

	MarkTileDirtyByTile(tile);

   244

}

   245

   246

uint32 GetTileTrackStatus(TileIndex tile, TransportType mode)

   247

{

   248

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

   249

}

   250

   251

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

   252

{

   253

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

   254

}

   255

   256

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   257

{

   258

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

   259

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

   260

}

   261

   262

void AnimateTile(TileIndex tile)

   263

{

   264

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

   265

}

   266

   267

void ClickTile(TileIndex tile)

   268

{

   269

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

   270

}

   271

   272

void DrawTile(TileInfo *ti)

   273

{

   274

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

   275

}

   276

   277

void GetTileDesc(TileIndex tile, TileDesc *td)

   278

{

   279

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

   280

}

   281

   282

/** Clear a piece of landscape

   283

 * @param x,y coordinates of clearance

   284

 * @param p1 unused

   285

 * @param p2 unused

   286

 */

   287

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

   288

{

   289

	TileIndex tile = TileVirtXY(x, y);

   290

   291

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   292

   293

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

   294

}

   295

   296

/** Clear a big piece of landscape

   297

 * @param x,y end coordinates of area dragging

   298

 * @param p1 start tile of area dragging

   299

 * @param p2 unused

   300

 */

   301

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

   302

{

   303

	int32 cost, ret, money;

   304

	int sx,sy;

   305

	int x,y;

   306

	bool success = false;

   307

   308

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

   309

   310

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   311

   312

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

   313

	sx = TileX(p1) * 16;

   314

	sy = TileY(p1) * 16;

   315

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

   316

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

   317

   318

	money = GetAvailableMoneyForCommand();

   319

	cost = 0;

   320

   321

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

   322

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

   323

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

   324

			if (CmdFailed(ret)) continue;

   325

			cost += ret;

   326

			success = true;

   327

   328

			if (flags & DC_EXEC) {

   329

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

   330

					_additional_cash_required = ret;

   331

					return cost - ret;

   332

				}

   333

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

   334

   335

				// draw explosion animation...

   336

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

   337

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

   338

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

   339

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

   340

					);

   341

				}

   342

			}

   343

		}

   344

	}

   345

   346

	return (success) ? cost : CMD_ERROR;

   347

}

   348

   349

   350

/* utility function used to modify a tile */

   351

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

   352

{

   353

	va_list va;

   354

	int i;

   355

   356

	va_start(va, flags);

   357

   358

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

   359

		SetTileType(tile, i - 1);

   360

	}

   361

   362

	if (flags & (MP_MAP2_CLEAR | MP_MAP2)) {

   363

		int x = 0;

   364

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

   365

		_m[tile].m2 = x;

   366

	}

   367

   368

	if (flags & (MP_MAP3LO_CLEAR | MP_MAP3LO)) {

   369

		int x = 0;

   370

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

   371

		_m[tile].m3 = x;

   372

	}

   373

   374

	if (flags & (MP_MAP3HI_CLEAR | MP_MAP3HI)) {

   375

		int x = 0;

   376

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

   377

		_m[tile].m4 = x;

   378

	}

   379

   380

	if (flags & (MP_MAPOWNER|MP_MAPOWNER_CURRENT)) {

   381

		PlayerID x = _current_player;

   382

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

   383

		_m[tile].m1 = x;

   384

	}

   385

   386

	if (flags & MP_MAP5) {

   387

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

   388

	}

   389

   390

	va_end(va);

   391

   392

	if (!(flags & MP_NODIRTY))

   393

		MarkTileDirtyByTile(tile);

   394

}

   395

   396

   397

#define TILELOOP_BITS 4

   398

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   399

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

   400

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

   401

   402

void RunTileLoop(void)

   403

{

   404

	TileIndex tile;

   405

	uint count;

   406

   407

	tile = _cur_tileloop_tile;

   408

   409

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

   410

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

   411

	do {

   412

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

   413

   414

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

   415

			tile += TILELOOP_SIZE; /* no overflow */

   416

		} else {

   417

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

   418

		}

   419

	} while (--count);

   420

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

   421

   422

	tile += 9;

   423

	if (tile & TILELOOP_CHKMASK)

   424

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

   425

	_cur_tileloop_tile = tile;

   426

}

   427

   428

void InitializeLandscape(void)

   429

{

   430

	uint maxx = MapMaxX();

   431

	uint maxy = MapMaxY();

   432

	uint sizex = MapSizeX();

   433

	uint x;

   434

	uint y;

   435

   436

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

   437

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

   438

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

   439

			SetTileHeight(sizex * y + x, 0);

   440

		}

   441

		MakeVoid(sizex * y + x);

   442

	}

   443

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

   444

}

   445

   446

void ConvertGroundTilesIntoWaterTiles(void)

   447

{

   448

	TileIndex tile = 0;

   449

	uint h;

   450

   451

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

   452

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

   453

			SetTileType(tile, MP_WATER);

   454

			SetTileOwner(tile, OWNER_WATER);

   455

			_m[tile].m5 = 0;

   456

		}

   457

	}

   458

}

   459

   460

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

   461

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

   462

   463

static void GenerateTerrain(int type, int flag)

   464

{

   465

	uint32 r;

   466

	uint x;

   467

	uint y;

   468

	uint w;

   469

	uint h;

   470

	const Sprite* template;

   471

	const byte *p;

   472

	Tile* tile;

   473

	byte direction;

   474

   475

	r = Random();

   476

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

   477

   478

	x = r & MapMaxX();

   479

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

   480

   481

   482

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

   483

   484

	direction = GB(r, 22, 2);

   485

	if (direction & 1) {

   486

		w = template->height;

   487

		h = template->width;

   488

	} else {

   489

		w = template->width;

   490

		h = template->height;

   491

	}

   492

	p = template->data;

   493

   494

	if (flag & 4) {

   495

		uint xw = x * MapSizeY();

   496

		uint yw = y * MapSizeX();

   497

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

   498

   499

		switch (flag & 3) {

   500

			case 0:

   501

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

   502

				break;

   503

   504

			case 1: