1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "map.h"

     4

#include "spritecache.h"

     6

#include "tile.h"

     7

#include <stdarg.h>

     8

#include "gfx.h"

     9

#include "viewport.h"

    10

#include "command.h"

    11

#include "vehicle.h"

    12

    13

extern const TileTypeProcs

    14

	_tile_type_clear_procs,

    15

	_tile_type_rail_procs,

    16

	_tile_type_road_procs,

    17

	_tile_type_town_procs,

    18

	_tile_type_trees_procs,

    19

	_tile_type_station_procs,

    20

	_tile_type_water_procs,

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	_tile_type_dummy_procs,

    22

	_tile_type_industry_procs,

    23

	_tile_type_tunnelbridge_procs,

    24

	_tile_type_unmovable_procs;

    25

    26

const TileTypeProcs * const _tile_type_procs[16] = {

    27

	&_tile_type_clear_procs,

    28

	&_tile_type_rail_procs,

    29

	&_tile_type_road_procs,

    30

	&_tile_type_town_procs,

    31

	&_tile_type_trees_procs,

    32

	&_tile_type_station_procs,

    33

	&_tile_type_water_procs,

    34

	&_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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};

    39

    40

/* 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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};

    45

    46

    47

void FindLandscapeHeightByTile(TileInfo *ti, TileIndex tile)

    48

{

    49

	assert(tile < MapSize());

    50

    51

	ti->tile = tile;

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	ti->map5 = _map5[tile];

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	ti->type = GetTileType(tile);

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

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}

    56

    57

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

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

    59

{

    60

	int tile;

    61

    62

	ti->x = x;

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	ti->y = y;

    64

    65

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

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		ti->tileh = 0;

    67

		ti->type = MP_VOID;

    68

		ti->tile = 0;

    69

		ti->map5 = 0;

    70

		ti->z = 0;

    71

		return;

    72

	}

    73

    74

	tile = TILE_FROM_XY(x,y);

    75

	FindLandscapeHeightByTile(ti, tile);

    76

}

    77

    78

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

    79

{

    80

	int z = 0;

    81

    82

	switch(corners) {

    83

	case 1:

    84

		if (x - y >= 0)

    85

			z = (x - y) >> 1;

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		break;

    87

    88

	case 2:

    89

		y^=0xF;

    90

		if ( (x - y) >= 0)

    91

			z = (x - y) >> 1;

    92

		break;

    93

    94

	case 3:

    95

		z = (x>>1) + 1;

    96

		break;

    97

    98

	case 4:

    99

		if (y - x >= 0)

   100

			z = (y - x) >> 1;

   101

		break;

   102

   103

	case 5:

   104

	case 10:

   105

	case 15:

   106

		z = 4;

   107

		break;

   108

   109

	case 6:

   110

		z = (y>>1) + 1;

   111

		break;

   112

   113

	case 7:

   114

		z = 8;

   115

		y^=0xF;

   116

		if (x - y < 0)

   117

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

   118

		break;

   119

   120

	case 8:

   121

		y ^= 0xF;

   122

		if (y - x >= 0)

   123

			z = (y - x) >> 1;

   124

		break;

   125

   126

	case 9:

   127

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

   128

		break;

   129

   130

	case 11:

   131

		z = 8;

   132

		if (x - y < 0)

   133

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

   134

		break;

   135

   136

	case 12:

   137

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

   138

		break;

   139

   140

	case 13:

   141

		z = 8;

   142

		y ^= 0xF;

   143

		if (y - x < 0)

   144

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

   145

		break;

   146

   147

	case 14:

   148

		z = 8;

   149

		if (y - x < 0)

   150

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

   151

		break;

   152

   153

	case 23:

   154

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

   155

		break;

   156

   157

	case 27:

   158

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

   159

		break;

   160

   161

	case 29:

   162

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

   163

		break;

   164

   165

	case 30:

   166

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

   167

		break;

   168

	}

   169

   170

	return z;

   171

}

   172

   173

uint GetSlopeZ(int x,  int y)

   174

{

   175

	TileInfo ti;

   176

//	int z;

   177

   178

	FindLandscapeHeight(&ti, x, y);

   179

   180

/*

   181

	z = ti.z;

   182

	x &= 0xF;

   183

	y &= 0xF;

   184

   185

   186

	assert(z < 256);

   187

*/

   188

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

   189

}

   190

   191

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

   192

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

   193

static bool hasFoundation(TileInfo *ti, bool direction)

   194

{

   195

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

   196

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

   197

	uint tileh = ti->tileh;

   198

   199

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

   200

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

   201

   202

	if(direction)

   203

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

   204

	else

   205

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

   206

	return south || other;

   207

   208

}

   209

   210

void DrawFoundation(TileInfo *ti, uint f)

   211

{

   212

	uint32 sprite_base = SPR_SLOPES_BASE-14;

   213

   214

	TileInfo ti2;

   215

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

   216

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

   217

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

   218

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

   219

   220

	if (f < 15) {

   221

		// leveled foundation

   222

		if( sprite_base < SPR_SLOPES_BASE ) sprite_base = 990; // use original slope sprites

   223

   224

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

   225

		ti->z += 8;

   226

		ti->tileh = 0;

   227

		OffsetGroundSprite(31, 1);

   228

	} else {

   229

		// inclined foundation

   230

		sprite_base += 14;

   231

   232

		AddSortableSpriteToDraw(

   233

			HASBIT( (1<<1) | (1<<2) | (1<<4) | (1<<8), ti->tileh) ? sprite_base + (f - 15) : 	ti->tileh + 0x3DE - 1,

   234

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

   235

		);

   236

   237

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

   238

		OffsetGroundSprite(31, 9);

   239

	}

   240

}

   241

   242

void DoClearSquare(uint tile)

   243

{

   244

	ModifyTile(tile,

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		MP_SETTYPE(MP_CLEAR) |

   246

		MP_MAP2_CLEAR | MP_MAP3LO_CLEAR | MP_MAP3HI_CLEAR | MP_MAPOWNER | MP_MAP5,

   247

		OWNER_NONE, /* map_owner */

   248

		_generating_world ? 3 : 0 /* map5 */

   249

	);

   250

}

   251

   252

uint32 GetTileTrackStatus(uint tile, TransportType mode)

   253

{

   254

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

   255

}

   256

   257

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

   258

{

   259

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

   260

}

   261

   262

void GetAcceptedCargo(uint tile, AcceptedCargo ac)

   263

{

   264

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

   265

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

   266

}

   267

   268

void AnimateTile(uint tile)

   269

{

   270

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

   271

}

   272

   273

void ClickTile(uint tile)

   274

{

   275

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

   276

}

   277

   278

void DrawTile(TileInfo *ti)

   279

{

   280

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

   281

}

   282

   283

void GetTileDesc(uint tile, TileDesc *td)

   284

{

   285

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

   286

}

   287

   288

/* Clear a piece of landscape

   289

 * p1 = 0,

   290

 * p2 = 0

   291

 */

   292

   293

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

   294

{

   295

	uint tile;

   296

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   297

   298

	tile = TILE_FROM_XY(x,y);

   299

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

   300

}

   301

   302

// p1 = end tile

   303

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

   304

{

   305

	int32 cost,ret, money;

   306

	int sx,sy;

   307

	int x,y;

   308

	bool success = false;

   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(TILE_FROM_XY(x,y), 0, 0, flags &~DC_EXEC, CMD_LANDSCAPE_CLEAR);

   324

			if (ret == CMD_ERROR) 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(TILE_FROM_XY(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

	if (!success)

   347

		cost = CMD_ERROR;

   348

	return cost;

   349

}

   350

   351

   352

/* utility function used to modify a tile */

   353

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

   354

{

   355

	va_list va;

   356

	int i;

   357

   358

	va_start(va, flags);

   359

   360

	if ((i = (flags >> 8) & 0xF) != 0) {

   361

		SetTileType(tile, i - 1);

   362

	}

   363

   364

	if (flags & (MP_MAP2_CLEAR | MP_MAP2)) {

   365

		int x = 0;

   366

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

   367

		_map2[tile] = x;

   368

	}

   369

   370

	if (flags & (MP_MAP3LO_CLEAR | MP_MAP3LO)) {

   371

		int x = 0;

   372

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

   373

		_map3_lo[tile] = x;

   374

	}

   375

   376

	if (flags & (MP_MAP3HI_CLEAR | MP_MAP3HI)) {

   377

		int x = 0;

   378

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

   379

		_map3_hi[tile] = x;

   380

	}

   381

   382

	if (flags & (MP_MAPOWNER|MP_MAPOWNER_CURRENT)) {

   383

		byte x = _current_player;

   384

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

   385

		_map_owner[tile] = x;

   386

	}

   387

   388

	if (flags & MP_MAP5) {

   389

		_map5[tile] = va_arg(va, int);

   390

	}

   391

   392

	va_end(va);

   393

   394

	if (!(flags & MP_NODIRTY))

   395

		MarkTileDirtyByTile(tile);

   396

}

   397

   398

   399

#define TILELOOP_BITS 4

   400

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   401

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

   402

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

   403

   404

void RunTileLoop(void)

   405

{

   406

	uint tile;

   407

	uint count;

   408

   409

	tile = _cur_tileloop_tile;

   410

   411

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

   412

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

   413

	do {

   414

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

   415

   416

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

   417

			tile += TILELOOP_SIZE; /* no overflow */

   418

		} else {

   419

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

   420

		}

   421

	} while (--count);

   422

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

   423

   424

	tile += 9;

   425

	if (tile & TILELOOP_CHKMASK)

   426

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

   427

	_cur_tileloop_tile = tile;

   428

}

   429

   430

void InitializeLandscape(uint log_x, uint log_y)

   431

{

   432

	uint map_size;

   433

	uint i;

   434

   435

	InitMap(log_x, log_y);

   436

	map_size = MapSize();

   437

   438

	memset(_map_type_and_height, MP_CLEAR << 4, map_size);

   439

	memset(_map_owner,              OWNER_NONE, map_size);

   440

	memset(_map2,                            0, map_size * sizeof(_map2[0]));

   441

	memset(_map3_lo,                         0, map_size);

   442

	memset(_map3_hi,                         0, map_size);

   443

	memset(_map5,                            3, map_size);

   444

	memset(_map_extra_bits,                  0, map_size / 4);

   445

   446

	// create void tiles at the border

   447

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

   448

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

   449

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

   450

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

   451

}

   452

   453

void ConvertGroundTilesIntoWaterTiles(void)

   454

{

   455

	TileIndex tile = 0;

   456

	uint h;

   457

   458

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

   459

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

   460

			SetTileType(tile, MP_WATER);

   461

			_map5[tile] = 0;

   462

			_map_owner[tile] = OWNER_WATER;

   463

		}

   464

	}

   465

}

   466

   467

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

   468

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

   469

   470

static void GenerateTerrain(int type, int flag)

   471

{

   472

	uint32 r;

   473

	uint x;

   474

	uint y;

   475

	uint w;

   476

	uint h;

   477

	const byte *p;

   478

	byte *tile;

   479

	byte direction;

   480

   481

	r = Random();

   482

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

   483

   484

	x = r & MapMaxX();

   485

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

   486

   487

   488

	if (x < 2 || y < 2)

   489

		return;

   490

   491

	direction = (r >> 22) & 3;

   492

	if (direction & 1) {

   493

		w = p[1];

   494

		h = p[2];

   495

	} else {

   496

		w = p[2];

   497

		h = p[1];

   498

	}

   499

	p += 8;

   500

   501

	if (flag & 4) {

   502

		uint xw = x * MapSizeY();

   503

		uint yw = y * MapSizeX();

   504

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

   505

   506

		switch (flag & 3) {

   507

			case 0:

   508

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

   509

				break;

   510

   511

			case 1:

   512

				if (yw < xw + bias) return;

   513

				break;