1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "map.h"

     4

#include <stdarg.h>

     5

#include "gfx.h"

     6

#include "viewport.h"

     7

#include "command.h"

     8

#include "vehicle.h"

     9

    10

extern const TileTypeProcs

    11

	_tile_type_clear_procs,

    12

	_tile_type_rail_procs,

    13

	_tile_type_road_procs,

    14

	_tile_type_town_procs,

    15

	_tile_type_trees_procs,

    16

	_tile_type_station_procs,

    17

	_tile_type_water_procs,

    18

	_tile_type_dummy_procs,

    19

	_tile_type_industry_procs,

    20

	_tile_type_tunnelbridge_procs,

    21

	_tile_type_unmovable_procs;

    22

    23

const TileTypeProcs * const _tile_type_procs[16] = {

    24

	&_tile_type_clear_procs,

    25

	&_tile_type_rail_procs,

    26

	&_tile_type_road_procs,

    27

	&_tile_type_town_procs,

    28

	&_tile_type_trees_procs,

    29

	&_tile_type_station_procs,

    30

	&_tile_type_water_procs,

    31

	&_tile_type_dummy_procs,

    32

	&_tile_type_industry_procs,

    33

	&_tile_type_tunnelbridge_procs,

    34

	&_tile_type_unmovable_procs,

    35

};

    36

    37

/* landscape slope => sprite */

    38

const byte _tileh_to_sprite[32] = {

    39

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

    40

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

    41

};

    42

    43

uint GetTileSlope(uint tile, int *h)

    44

{

    45

	uint a,b,c,d,min;

    46

	int r;

    47

    48

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

    49

		if (h)

    50

			*h = 0;

    51

		return 0;

    52

	}

    53

    54

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

    55

    56

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

    57

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

    58

	if (min >= b) min = b;

    59

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

    60

	if (min >= c) min = c;

    61

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

    62

	if (min >= d) min = d;

    63

    64

	r = 0;

    65

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

    66

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

    67

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

    68

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

    69

    70

	if (h != 0)

    71

		*h = min * 8;

    72

    73

	return r;

    74

}

    75

    76

int GetTileZ(uint tile)

    77

{

    78

	int h;

    79

	GetTileSlope(tile, &h);

    80

	return h;

    81

}

    82

    83

void FindLandscapeHeightByTile(TileInfo *ti, uint tile)

    84

{

    85

	if (GET_TILE_X(tile) == TILE_X_MAX ||

    86

			GET_TILE_Y(tile) == TILE_Y_MAX) {

    87

		ti->tileh = 0;

    88

		ti->type = MP_STRANGE;

    89

		ti->tile = 0;

    90

		ti->map5 = 0;

    91

		ti->z = 0;

    92

		return;

    93

	}

    94

    95

	ti->tile = tile;

    96

	ti->map5 = _map5[tile];

    97

	ti->type = GET_TILETYPE(tile);

    98

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

    99

//	ti->z = min * 8;

   100

}

   101

   102

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

   103

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

   104

{

   105

	int tile;

   106

   107

	ti->x = x;

   108

	ti->y = y;

   109

   110

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

   111

		ti->tileh = 0;

   112

		ti->type = MP_STRANGE;

   113

		ti->tile = 0;

   114

		ti->map5 = 0;

   115

		ti->z = 0;

   116

		return;

   117

	}

   118

   119

	tile = TILE_FROM_XY(x,y);

   120

	FindLandscapeHeightByTile(ti, tile);

   121

}

   122

   123

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

   124

{

   125

	int z = 0;

   126

   127

	switch(corners) {

   128

	case 1:

   129

		if (x - y >= 0)

   130

			z = (x - y) >> 1;

   131

		break;

   132

   133

	case 2:

   134

		y^=0xF;

   135

		if ( (x - y) >= 0)

   136

			z = (x - y) >> 1;

   137

		break;

   138

   139

	case 3:

   140

		z = (x>>1) + 1;

   141

		break;

   142

   143

	case 4:

   144

		if (y - x >= 0)

   145

			z = (y - x) >> 1;

   146

		break;

   147

   148

	case 5:

   149

	case 10:

   150

	case 15:

   151

		z = 4;

   152

		break;

   153

   154

	case 6:

   155

		z = (y>>1) + 1;

   156

		break;

   157

   158

	case 7:

   159

		z = 8;

   160

		y^=0xF;

   161

		if (x - y < 0)

   162

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

   163

		break;

   164

   165

	case 8:

   166

		y ^= 0xF;

   167

		if (y - x >= 0)

   168

			z = (y - x) >> 1;

   169

		break;

   170

   171

	case 9:

   172

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

   173

		break;

   174

   175

	case 11:

   176

		z = 8;

   177

		if (x - y < 0)

   178

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

   179

		break;

   180

   181

	case 12:

   182

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

   183

		break;

   184

   185

	case 13:

   186

		z = 8;

   187

		y ^= 0xF;

   188

		if (y - x < 0)

   189

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

   190

		break;

   191

   192

	case 14:

   193

		z = 8;

   194

		if (y - x < 0)

   195

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

   196

		break;

   197

   198

	case 23:

   199

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

   200

		break;

   201

   202

	case 27:

   203

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

   204

		break;

   205

   206

	case 29:

   207

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

   208

		break;

   209

   210

	case 30:

   211

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

   212

		break;

   213

	}

   214

   215

	return z;

   216

}

   217

   218

uint GetSlopeZ(int x,  int y)

   219

{

   220

	TileInfo ti;

   221

//	int z;

   222

   223

	FindLandscapeHeight(&ti, x, y);

   224

   225

/*

   226

	z = ti.z;

   227

	x &= 0xF;

   228

	y &= 0xF;

   229

   230

   231

	assert(z < 256);

   232

*/

   233

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

   234

}

   235

   236

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

   237

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

   238

bool hasFoundation(TileInfo *ti, bool direction)

   239

{

   240

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

   241

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

   242

	uint tileh = ti->tileh;

   243

   244

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

   245

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

   246

   247

	if(direction)

   248

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

   249

	else

   250

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

   251

	return south || other;

   252

   253

}

   254

   255

void DrawFoundation(TileInfo *ti, uint f)

   256

{

   257

	uint32 sprite_base = SPR_SLOPES_BASE-14;

   258

   259

	TileInfo ti2;

   260

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

   261

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

   262

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

   263

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

   264

   265

	if (f < 15) {

   266

		// leveled foundation

   267

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

   268

   269

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

   270

		ti->z += 8;

   271

		ti->tileh = 0;

   272

		OffsetGroundSprite(31, 1);

   273

	} else {

   274

		// inclined foundation

   275

		sprite_base += 14;

   276

   277

		AddSortableSpriteToDraw(

   278

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

   279

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

   280

		);

   281

   282

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

   283

		OffsetGroundSprite(31, 9);

   284

	}

   285

}

   286

   287

void DoClearSquare(uint tile)

   288

{

   289

	ModifyTile(tile,

   290

		MP_SETTYPE(MP_CLEAR) |

   291

		MP_MAP2_CLEAR | MP_MAP3LO_CLEAR | MP_MAP3HI_CLEAR | MP_MAPOWNER | MP_MAP5,

   292

		OWNER_NONE, /* map_owner */

   293

		_generating_world ? 3 : 0 /* map5 */

   294

	);

   295

}

   296

   297

uint32 GetTileTrackStatus(uint tile, TransportType mode)

   298

{

   299

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

   300

}

   301

   302

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

   303

{

   304

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

   305

}

   306

   307

void GetAcceptedCargo(uint tile, AcceptedCargo ac)

   308

{

   309

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

   310

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

   311

}

   312

   313

void AnimateTile(uint tile)

   314

{

   315

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

   316

}

   317

   318

void ClickTile(uint tile)

   319

{

   320

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

   321

}

   322

   323

void DrawTile(TileInfo *ti)

   324

{

   325

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

   326

}

   327

   328

void GetTileDesc(uint tile, TileDesc *td)

   329

{

   330

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

   331

}

   332

   333

/* Clear a piece of landscape

   334

 * p1 = 0,

   335

 * p2 = 0

   336

 */

   337

   338

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

   339

{

   340

	uint tile;

   341

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   342

   343

	tile = TILE_FROM_XY(x,y);

   344

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

   345

}

   346

   347

// p1 = end tile

   348

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

   349

{

   350

	int32 cost,ret, money;

   351

	int sx,sy;

   352

	int x,y;

   353

	bool success = false;

   354

   355

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

   356

	sx = GET_TILE_X(p1)*16;

   357

	sy = GET_TILE_Y(p1)*16;

   358

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

   359

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

   360

   361

	money = GetAvailableMoneyForCommand();

   362

	cost = 0;

   363

   364

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

   365

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

   366

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

   367

			if (ret == CMD_ERROR) continue;

   368

			cost += ret;

   369

			success = true;

   370

   371

			if (flags & DC_EXEC) {

   372

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

   373

					_additional_cash_required = ret;

   374

					return cost - ret;

   375

				}

   376

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

   377

   378

				// draw explosion animation...

   379

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

   380

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

   381

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

   382

				}

   383

			}

   384

		}

   385

	}

   386

   387

	if (!success)

   388

		cost = CMD_ERROR;

   389

	return cost;

   390

}

   391

   392

   393

/* utility function used to modify a tile */

   394

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

   395

{

   396

	va_list va;

   397

	int i;

   398

   399

	va_start(va, flags);

   400

   401

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

   402

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

   403

	}

   404

   405

	if (flags & (MP_MAP2_CLEAR | MP_MAP2)) {

   406

		int x = 0;

   407

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

   408

		_map2[tile] = x;

   409

	}

   410

   411

	if (flags & (MP_MAP3LO_CLEAR | MP_MAP3LO)) {

   412

		int x = 0;

   413

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

   414

		_map3_lo[tile] = x;

   415

	}

   416

   417

	if (flags & (MP_MAP3HI_CLEAR | MP_MAP3HI)) {

   418

		int x = 0;

   419

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

   420

		_map3_hi[tile] = x;

   421

	}

   422

   423

	if (flags & (MP_MAPOWNER|MP_MAPOWNER_CURRENT)) {

   424

		byte x = _current_player;

   425

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

   426

		_map_owner[tile] = x;

   427

	}

   428

   429

	if (flags & MP_MAP5) {

   430

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

   431

	}

   432

   433

	va_end(va);

   434

   435

	if (!(flags & MP_NODIRTY))

   436

		MarkTileDirtyByTile(tile);

   437

}

   438

   439

void SetMapExtraBits(uint tile, byte bits)

   440

{

   441

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

   442

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

   443

}

   444

   445

uint GetMapExtraBits(uint tile)

   446

{

   452

}

   453

   454

#define TILELOOP_BITS 4

   455

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   456

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

   457

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

   458

   459

void RunTileLoop()

   460

{

   461

	uint tile;

   462

	uint count;

   463

   464

	tile = _cur_tileloop_tile;

   465

   466

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

   467

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

   468

	do {

   469

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

   470

   471

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

   472

			tile += TILELOOP_SIZE; /* no overflow */

   473

		} else {

   474

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

   475

		}

   476

	} while (--count);

   477

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

   478

   479

	tile += 9;

   480

	if (tile & TILELOOP_CHKMASK)

   481

		tile = (tile + TILES_X) & TILELOOP_ASSERTMASK;

   482

	_cur_tileloop_tile = tile;

   483

}

   484

   485

void InitializeLandscape()

   486

{

   487

	uint map_size = MapSize();

   488

	int i;

   489

   490

	memset(_map_owner, OWNER_NONE, map_size);

   491

	memset(_map2, 0, map_size * sizeof(uint16));

   492

	memset(_map3_lo, 0, map_size);

   493

	memset(_map3_hi, 0, map_size);

   494

	memset(_map_extra_bits, 0, map_size / 4);

   495

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

   496

   497

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

   498

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

   499

   500

	memset(_map5, 3, map_size);

   501

}

   502

   503

void ConvertGroundTilesIntoWaterTiles()

   504

{

   505

	uint tile = 0;

   506

	int h;

   507

   508

	while(true) {

   509

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

   510

			_map_type_and_height[tile] = MP_WATER << 4;

   511

			_map5[tile] = 0;

   512

			_map_owner[tile] = OWNER_WATER;

   513

		}

   514

		tile++;

   515

		if (GET_TILE_X(tile) == TILE_X_MAX) {

   516

			tile += TILE_XY(-TILE_X_MAX, 1);

   517

			if (GET_TILE_Y(tile) == TILE_Y_MAX)

   518

				break;

   519

		}

   520

	}

   521

}

   522