1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include <stdarg.h>

     4

#include "gfx.h"

     5

#include "viewport.h"

     6

#include "command.h"

     7

#include "vehicle.h"

     8

     9

byte _map_type_and_height[TILES_X * TILES_Y];

    10

byte _map5[TILES_X * TILES_Y];

    11

byte _map3_lo[TILES_X * TILES_Y];

    12

byte _map3_hi[TILES_X * TILES_Y];

    13

byte _map_owner[TILES_X * TILES_Y];

    14

byte _map2[TILES_X * TILES_Y];

    15

byte _map_extra_bits[TILES_X * TILES_Y/4];

    16

    17

extern const TileTypeProcs 

    18

	_tile_type_clear_procs,

    19

	_tile_type_rail_procs,

    20

	_tile_type_road_procs,

    21

	_tile_type_town_procs,

    22

	_tile_type_trees_procs,

    23

	_tile_type_station_procs,

    24

	_tile_type_water_procs,

    25

	_tile_type_dummy_procs,

    26

	_tile_type_industry_procs,

    27

	_tile_type_tunnelbridge_procs,

    28

	_tile_type_unmovable_procs;

    29

    30

const TileTypeProcs * const _tile_type_procs[16] = {

    31

	&_tile_type_clear_procs,

    32

	&_tile_type_rail_procs,

    33

	&_tile_type_road_procs,

    34

	&_tile_type_town_procs,

    35

	&_tile_type_trees_procs,

    36

	&_tile_type_station_procs,

    37

	&_tile_type_water_procs,

    38

	&_tile_type_dummy_procs,

    39

	&_tile_type_industry_procs,

    40

	&_tile_type_tunnelbridge_procs,

    41

	&_tile_type_unmovable_procs,

    42

};

    43

    44

/* landscape slope => sprite */

    45

const byte _tileh_to_sprite[32] = {

    46

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

    47

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

    48

};

    49

    50

uint GetTileSlope(uint tile, int *h)

    51

{

    52

	uint a,b,c,d,min;

    53

	int r;

    54

    55

	if (GET_TILE_X(tile) == TILE_X_MAX || GET_TILE_Y(tile) == TILE_Y_MAX) {

    56

		if (h)

    57

			*h = 0;

    58

		return 0;

    59

	}

    60

    61

	assert(tile < TILES_X * TILES_Y && GET_TILE_X(tile) != TILE_X_MAX && GET_TILE_Y(tile) != TILE_Y_MAX);

    62

    63

	min = a = _map_type_and_height[tile] & 0xF;

    64

	b = _map_type_and_height[tile+TILE_XY(1,0)] & 0xF;

    65

	if (min >= b) min = b;

    66

	c = _map_type_and_height[tile+TILE_XY(0,1)] & 0xF;

    67

	if (min >= c) min = c;

    68

	d = _map_type_and_height[tile+TILE_XY(1,1)] & 0xF;

    69

	if (min >= d) min = d;

    70

    71

	r = 0;

    72

	if ((a-=min)!=0) { r += (--a << 4) + 8; }

    73

	if ((c-=min)!=0) { r += (--c << 4) + 4; }

    74

	if ((d-=min)!=0) { r += (--d << 4) + 2; }

    75

	if ((b-=min)!=0) { r += (--b << 4) + 1; }

    76

    77

	if (h != 0)

    78

		*h = min * 8;

    79

    80

	return r;

    81

}

    82

    83

int GetTileZ(uint tile)

    84

{

    85

	int h;

    86

	GetTileSlope(tile, &h);

    87

	return h;

    88

}

    89

    90

void FindLandscapeHeightByTile(TileInfo *ti, uint tile)

    91

{

    92

	if (GET_TILE_X(tile) == TILE_X_MAX ||

    93

			GET_TILE_Y(tile) == TILE_Y_MAX) {

    94

		ti->tileh = 0;

    95

		ti->type = MP_STRANGE;

    96

		ti->tile = 0;

    97

		ti->map5 = 0;

    98

		ti->z = 0;

    99

		return;

   100

	}

   101

   102

	ti->tile = tile;

   103

	ti->map5 = _map5[tile];

   104

	ti->type = GET_TILETYPE(tile);

   105

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

   106

//	ti->z = min * 8;

   107

}

   108

   109

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

   110

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

   111

{

   112

	int tile;

   113

   114

	ti->x = x;

   115

	ti->y = y;

   116

   117

	if (x >= TILE_X_MAX*16-1 || y >= TILE_Y_MAX*16-1) {

   118

		ti->tileh = 0;

   119

		ti->type = MP_STRANGE;

   120

		ti->tile = 0;

   121

		ti->map5 = 0;

   122

		ti->z = 0;

   123

		return;

   124

	}

   125

   126

	tile = TILE_FROM_XY(x,y);

   127

	FindLandscapeHeightByTile(ti, tile);

   128

}

   129

   130

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

   131

{

   132

	int z = 0;

   133

   134

	switch(corners) {

   135

	case 1:

   136

		if (x - y >= 0)

   137

			z = (x - y) >> 1;

   138

		break;

   139

   140

	case 2:

   141

		y^=0xF;

   142

		if ( (x - y) >= 0)

   143

			z = (x - y) >> 1;

   144

		break;

   145

   146

	case 3:

   147

		z = (x>>1) + 1;

   148

		break;

   149

   150

	case 4:

   151

		if (y - x >= 0)

   152

			z = (y - x) >> 1;

   153

		break;

   154

   155

	case 5:

   156

	case 10:

   157

	case 15:

   158

		z = 4;

   159

		break;

   160

   161

	case 6:

   162

		z = (y>>1) + 1;

   163

		break;

   164

   165

	case 7:

   166

		z = 8;

   167

		y^=0xF;

   168

		if (x - y < 0)

   169

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

   170

		break;

   171

   172

	case 8:

   173

		y ^= 0xF;

   174

		if (y - x >= 0)

   175

			z = (y - x) >> 1;

   176

		break;

   177

   178

	case 9:

   179

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

   180

		break;

   181

   182

	case 11:

   183

		z = 8;

   184

		if (x - y < 0)

   185

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

   186

		break;

   187

   188

	case 12:

   189

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

   190

		break;

   191

   192

	case 13:

   193

		z = 8;

   194

		y ^= 0xF;

   195

		if (y - x < 0)

   196

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

   197

		break;

   198

   199

	case 14:

   200

		z = 8;

   201

		if (y - x < 0)

   202

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

   203

		break;

   204

   205

	case 23:

   206

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

   207

		break;

   208

   209

	case 27:

   210

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

   211

		break;

   212

   213

	case 29:

   214

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

   215

		break;

   216

   217

	case 30:

   218

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

   219

		break;

   220

	}

   221

   222

	return z;

   223

}

   224

   225

uint GetSlopeZ(int x,  int y)

   226

{

   227

	TileInfo ti;

   228

//	int z;

   229

   230

	FindLandscapeHeight(&ti, x, y);

   231

   232

/*

   233

	z = ti.z;

   234

	x &= 0xF;

   235

	y &= 0xF;

   236

   237

   238

	assert(z < 256);

   239

*/

   240

   241

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

   242

}

   243

   251

void DrawFoundation(TileInfo *ti, uint f)

   252

{

   257

	if (f < 15) {

   258

		// leveled foundation	

   262

		ti->z += 8;

   263

		ti->tileh = 0;

   264

		OffsetGroundSprite(31, 1);

   265

	} else {

   266

		// inclined foundation

   268

   269

		AddSortableSpriteToDraw(

   271

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

   272

		);

   273

   274

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

   275

		OffsetGroundSprite(31, 9);

   276

	}

   277

}

   278

   279

void DoClearSquare(uint tile)

   280

{

   281

	ModifyTile(tile,

   282

		MP_SETTYPE(MP_CLEAR) |

   283

		MP_MAP2_CLEAR | MP_MAP3LO_CLEAR | MP_MAP3HI_CLEAR | MP_MAPOWNER | MP_MAP5,

   284

		OWNER_NONE, /* map_owner */

   285

		_generating_world ? 3 : 0 /* map5 */

   286

	);

   287

}

   288

   289

uint32 GetTileTrackStatus(uint tile, int mode)

   290

{

   291

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

   292

}

   293

   294

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

   295

{

   296

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

   297

}

   298

   299

void GetAcceptedCargo(uint tile, AcceptedCargo *ac)

   300

{

   301

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

   302

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

   303

}

   304

   305

void AnimateTile(uint tile)

   306

{

   307

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

   308

}

   309

   310

void ClickTile(uint tile)

   311

{

   312

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

   313

}

   314

   315

void DrawTile(TileInfo *ti)

   316

{

   317

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

   318

}

   319

   320

void GetTileDesc(uint tile, TileDesc *td)

   321

{

   322

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

   323

}

   324

   325

/* Clear a piece of landscape

   326

 * p1 = 0,

   327

 * p2 = 0

   328

 */

   329

   330

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

   331

{

   332

	uint tile;

   333

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   334

   335

	tile = TILE_FROM_XY(x,y);

   336

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

   337

}

   338

   339

// p1 = end tile

   340

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

   341

{

   342

	int32 cost,ret, money;

   343

	int sx,sy;

   344

	int x,y;

   345

	bool success = false;

   346

   347

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

   348

	sx = GET_TILE_X(p1)*16;

   349

	sy = GET_TILE_Y(p1)*16;

   350

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

   351

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

   352

   353

	money = GetAvailableMoneyForCommand();

   354

	cost = 0;

   355

   356

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

   357

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

   358

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

   359

			if (ret == CMD_ERROR) continue;

   360

			cost += ret;

   361

			success = true;

   362

   363

			if (flags & DC_EXEC) {

   364

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

   365

					_additional_cash_required = ret;

   366

					return cost - ret;

   367

				}

   368

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

   369

   370

				// draw explosion animation...

   371

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

   372

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

   373

					CreateEffectVehicleAbove(x + 8,y + 8, 2, sy==ey && sx==ex ? EV_DEMOLISH : EV_CRASHED_SMOKE);

   374

				}

   375

			}

   376

		}

   377

	}

   378

   379

	if (!success)

   380

		cost = CMD_ERROR;

   381

	return cost;

   382

}

   383

   384

   385

/* utility function used to modify a tile */

   386

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

   387

{

   388

	va_list va;

   389

	int i;

   390

   391

	va_start(va, flags);

   392

   393

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

   394

		_map_type_and_height[tile] = (_map_type_and_height[tile]&~0xF0)|((i-1) << 4);

   395

	}

   396

   397

	if (flags & (MP_MAP2_CLEAR | MP_MAP2)) {

   398

		int x = 0;

   399

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

   400

		_map2[tile] = x;

   401

	}

   402

   403

	if (flags & (MP_MAP3LO_CLEAR | MP_MAP3LO)) {

   404

		int x = 0;

   405

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

   406

		_map3_lo[tile] = x;

   407

	}

   408

   409

	if (flags & (MP_MAP3HI_CLEAR | MP_MAP3HI)) {

   410

		int x = 0;

   411

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

   412

		_map3_hi[tile] = x;

   413

	}

   414

   415

	if (flags & (MP_MAPOWNER|MP_MAPOWNER_CURRENT)) {

   416

		byte x = _current_player;

   417

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

   418

		_map_owner[tile] = x;

   419

	}

   420

   421

	if (flags & MP_MAP5) {

   422

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

   423

	}

   424

   425

	va_end(va);

   426

   427

	if (!(flags & MP_NODIRTY))

   428

		MarkTileDirtyByTile(tile);

   429

}

   430

   431

void SetMapExtraBits(uint tile, byte bits)

   432

{

   433

	_map_extra_bits[tile >> 2] &= ~(3 << ((tile&3)*2));

   434

	_map_extra_bits[tile >> 2] |= (bits&3) << ((tile&3)*2);

   435

}

   436

   437

uint GetMapExtraBits(uint tile)

   438

{

   439

	return (_map_extra_bits[tile >> 2] >> (tile&3)*2)&3;

   440

}

   441

   442

#define TILELOOP_BITS 4

   443

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   444

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

   445

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

   446

   447

void RunTileLoop()

   448

{

   449

	uint tile;

   450

	uint count;

   451

   452

	tile = _cur_tileloop_tile;

   453

   454

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

   455

	count = (TILES_X/TILELOOP_SIZE) * (TILES_Y/TILELOOP_SIZE);

   456

	do {

   457

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

   458

   459

		if ( GET_TILE_X(tile) < TILES_X - TILELOOP_SIZE) {

   460

			tile += TILELOOP_SIZE; /* no overflow */

   461

		} else {

   462

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

   463

		}

   464

	} while (--count);

   465

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

   466

   467

	tile += 9;

   468

	if (tile & TILELOOP_CHKMASK)

   469

		tile = (tile + TILES_X) & TILELOOP_ASSERTMASK;

   470

	_cur_tileloop_tile = tile;

   471

}

   472

   473

void InitializeLandscape()

   474

{

   475

	int i;

   476

   477

	memset(_map_owner, OWNER_NONE, sizeof(_map_owner));

   478

	memset(_map2, 0, sizeof(_map2));

   479

	memset(_map3_lo, 0, sizeof(_map3_lo));

   480

	memset(_map3_hi, 0, sizeof(_map3_hi));

   481

	memset(_map_extra_bits, 0, sizeof(_map_extra_bits));

   482

	memset(_map_type_and_height, MP_WATER << 4, sizeof(_map_type_and_height));

   483

   484

	for(i=0; i!=TILES_Y-1; i++)

   485

		memset(_map_type_and_height + i*TILES_X, 0, TILES_X-1);

   486

   487

	memset(_map5, 3, sizeof(_map5));

   488

}

   489

   490

void ConvertGroundTilesIntoWaterTiles()

   491

{

   492

	uint tile = 0;

   493

	int h;

   494

   495

	while(true) {

   496

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

   497

			_map_type_and_height[tile] = MP_WATER << 4;

   498

			_map5[tile] = 0;

   499

			_map_owner[tile] = OWNER_WATER;

   500

		}

   501

		tile++;

   502

		if (GET_TILE_X(tile) == TILE_X_MAX) {

   503

			tile += TILE_XY(-TILE_X_MAX, 1);

   504

			if (GET_TILE_Y(tile) == TILE_Y_MAX)

   505

				break;

   506

		}

   507

	}

   508

}

   509

   510

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

   511

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

   512

   513

static void GenerateTerrain(int type, int flag)

   514

{

   515

	uint32 r;

   516

	int x,y;

   517

	int w,h;

   518

	byte *p,*tile;

   519

	byte direction;

   520

   521

	r = Random();

   522

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

   523

   524

	x = r & TILE_X_MAX;

   525

	y = (r >> TILE_X_BITS) & TILE_Y_MAX;

   526

   527

   528

	if (x < 2 || y < 2)