1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "clear_map.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_map.h"

    18

#include "water_map.h"

    19

    20

extern const TileTypeProcs

    21

	_tile_type_clear_procs,

    22

	_tile_type_rail_procs,

    23

	_tile_type_road_procs,

    24

	_tile_type_town_procs,

    25

	_tile_type_trees_procs,

    26

	_tile_type_station_procs,

    27

	_tile_type_water_procs,

    28

	_tile_type_dummy_procs,

    29

	_tile_type_industry_procs,

    30

	_tile_type_tunnelbridge_procs,

    31

	_tile_type_unmovable_procs;

    32

    33

const TileTypeProcs * const _tile_type_procs[16] = {

    34

	&_tile_type_clear_procs,

    35

	&_tile_type_rail_procs,

    36

	&_tile_type_road_procs,

    37

	&_tile_type_town_procs,

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	&_tile_type_trees_procs,

    39

	&_tile_type_station_procs,

    40

	&_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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};

    46

    47

/* 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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};

    52

    53

const byte _inclined_tileh[] = {

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

    55

};

    56

    57

    58

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

    59

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

    60

{

    61

	ti->x = x;

    62

	ti->y = y;

    63

    64

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

    65

		ti->tileh = 0;

    66

		ti->type = MP_VOID;

    67

		ti->tile = 0;

    68

		ti->map5 = 0;

    69

		ti->z = 0;

    70

	} else {

    71

		TileIndex tile = TileVirtXY(x, y);

    72

    73

		ti->tile = tile;

    74

		ti->type = GetTileType(tile);

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

    76

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

    77

	}

    78

}

    79

    80

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

    81

{

    82

	int z = 0;

    83

    84

	switch (corners) {

    85

	case 1:

    86

		if (x - y >= 0)

    87

			z = (x - y) >> 1;

    88

		break;

    89

    90

	case 2:

    91

		y^=0xF;

    92

		if ( (x - y) >= 0)

    93

			z = (x - y) >> 1;

    94

		break;

    95

    96

	case 3:

    97

		z = (x>>1) + 1;

    98

		break;

    99

   100

	case 4:

   101

		if (y - x >= 0)

   102

			z = (y - x) >> 1;

   103

		break;

   104

   105

	case 5:

   106

	case 10:

   107

	case 15:

   108

		z = 4;

   109

		break;

   110

   111

	case 6:

   112

		z = (y>>1) + 1;

   113

		break;

   114

   115

	case 7:

   116

		z = 8;

   117

		y^=0xF;

   118

		if (x - y < 0)

   119

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

   120

		break;

   121

   122

	case 8:

   123

		y ^= 0xF;

   124

		if (y - x >= 0)

   125

			z = (y - x) >> 1;

   126

		break;

   127

   128

	case 9:

   129

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

   130

		break;

   131

   132

	case 11:

   133

		z = 8;

   134

		if (x - y < 0)

   135

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

   136

		break;

   137

   138

	case 12:

   139

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

   140

		break;

   141

   142

	case 13:

   143

		z = 8;

   144

		y ^= 0xF;

   145

		if (y - x < 0)

   146

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

   147

		break;

   148

   149

	case 14:

   150

		z = 8;

   151

		if (y - x < 0)

   152

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

   153

		break;

   154

   155

	case 23:

   156

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

   157

		break;

   158

   159

	case 27:

   160

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

   161

		break;

   162

   163

	case 29:

   164

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

   165

		break;

   166

   167

	case 30:

   168

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

   169

		break;

   170

	}

   171

   172

	return z;

   173

}

   174

   175

uint GetSlopeZ(int x, int y)

   176

{

   177

	TileInfo ti;

   178

   179

	FindLandscapeHeight(&ti, x, y);

   180

   181

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

   182

}

   183

   184

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

   185

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

   186

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

   187

{

   188

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

   189

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

   190

	uint tileh = ti->tileh;

   191

   192

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

   193

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

   194

   195

	if (direction) {

   196

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

   197

	} else {

   198

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

   199

	}

   200

	return south || other;

   201

}

   202

   203

void DrawFoundation(TileInfo *ti, uint f)

   204

{

   205

	uint32 sprite_base = SPR_SLOPES_BASE-14;

   206

   207

	TileInfo ti2;

   208

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

   209

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

   210

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

   211

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

   212

   213

	if (f < 15) {

   214

		// leveled foundation

   215

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

   216

   217

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

   218

		ti->z += 8;

   219

		ti->tileh = 0;

   220

		OffsetGroundSprite(31, 1);

   221

	} else {

   222

		// inclined foundation

   223

		sprite_base += 14;

   224

   225

		AddSortableSpriteToDraw(

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

   227

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

   228

		);

   229

   230

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

   231

		OffsetGroundSprite(31, 9);

   232

	}

   233

}

   234

   235

void DoClearSquare(TileIndex tile)

   236

{

   237

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

   238

	MarkTileDirtyByTile(tile);

   239

}

   240

   241

uint32 GetTileTrackStatus(TileIndex tile, TransportType mode)

   242

{

   243

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

   244

}

   245

   246

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

   247

{

   248

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

   249

}

   250

   251

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   252

{

   253

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

   254

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

   255

}

   256

   257

void AnimateTile(TileIndex tile)

   258

{

   259

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

   260

}

   261

   262

void ClickTile(TileIndex tile)

   263

{

   264

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

   265

}

   266

   267

void DrawTile(TileInfo *ti)

   268

{

   269

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

   270

}

   271

   272

void GetTileDesc(TileIndex tile, TileDesc *td)

   273

{

   274

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

   275

}

   276

   277

/** Clear a piece of landscape

   278

 * @param x,y coordinates of clearance

   279

 * @param p1 unused

   280

 * @param p2 unused

   281

 */

   282

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

   283

{

   284

	TileIndex tile = TileVirtXY(x, y);

   285

   286

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   287

   288

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

   289

}

   290

   291

/** Clear a big piece of landscape

   292

 * @param x,y end coordinates of area dragging

   293

 * @param p1 start tile of area dragging

   294

 * @param p2 unused

   295

 */

   296

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

   297

{

   298

	int32 cost, ret, money;

   299

	int sx,sy;

   300

	int x,y;

   301

	bool success = false;

   302

   303

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

   304

   305

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   306

   307

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

   308

	sx = TileX(p1) * 16;

   309

	sy = TileY(p1) * 16;

   310

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

   311

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

   312

   313

	money = GetAvailableMoneyForCommand();

   314

	cost = 0;

   315

   316

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

   317

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

   318

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

   319

			if (CmdFailed(ret)) continue;

   320

			cost += ret;

   321

			success = true;

   322

   323

			if (flags & DC_EXEC) {

   324

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

   325

					_additional_cash_required = ret;

   326

					return cost - ret;

   327

				}

   328

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

   329

   330

				// draw explosion animation...

   331

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

   332

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

   333

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

   334

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

   335

					);

   336

				}

   337

			}

   338

		}

   339

	}

   340

   341

	return (success) ? cost : CMD_ERROR;

   342

}

   343

   344

   345

/* utility function used to modify a tile */

   346

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

   347

{

   348

	va_list va;

   349

	int i;

   350

   351

	va_start(va, flags);

   352

   353

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

   354

		SetTileType(tile, i - 1);

   355

	}

   356

   357

	if (flags & (MP_MAP2_CLEAR | MP_MAP2)) {

   358

		int x = 0;

   359

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

   360

		_m[tile].m2 = x;

   361

	}

   362

   363

	if (flags & (MP_MAP3LO_CLEAR | MP_MAP3LO)) {

   364

		int x = 0;

   365

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

   366

		_m[tile].m3 = x;

   367

	}

   368

   369

	if (flags & (MP_MAP3HI_CLEAR | MP_MAP3HI)) {

   370

		int x = 0;

   371

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

   372

		_m[tile].m4 = x;

   373

	}

   374

   375

	if (flags & (MP_MAPOWNER|MP_MAPOWNER_CURRENT)) {

   376

		PlayerID x = _current_player;

   377

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

   378

		_m[tile].m1 = x;

   379

	}

   380

   381

	if (flags & MP_MAP5) {

   382

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

   383

	}

   384

   385

	va_end(va);

   386

   387

	if (!(flags & MP_NODIRTY))

   388

		MarkTileDirtyByTile(tile);

   389

}

   390

   391

   392

#define TILELOOP_BITS 4

   393

#define TILELOOP_SIZE (1 << TILELOOP_BITS)

   394

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

   395

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

   396

   397

void RunTileLoop(void)

   398

{

   399

	TileIndex tile;

   400

	uint count;

   401

   402

	tile = _cur_tileloop_tile;

   403

   404

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

   405

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

   406

	do {

   407

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

   408

   409

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

   410

			tile += TILELOOP_SIZE; /* no overflow */

   411

		} else {

   412

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

   413

		}

   414

	} while (--count);

   415

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

   416

   417

	tile += 9;

   418

	if (tile & TILELOOP_CHKMASK)

   419

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

   420

	_cur_tileloop_tile = tile;

   421

}

   422

   423

void InitializeLandscape(void)

   424

{

   425

	uint maxx = MapMaxX();

   426

	uint maxy = MapMaxY();

   427

	uint sizex = MapSizeX();

   428

	uint x;

   429

	uint y;

   430

   431

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

   432

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

   433

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

   434

			SetTileHeight(sizex * y + x, 0);

   435

		}

   436

		MakeVoid(sizex * y + x);

   437

	}

   438

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

   439

}

   440

   441

void ConvertGroundTilesIntoWaterTiles(void)

   442

{

   443

	TileIndex tile = 0;

   444

	uint h;

   445

   446

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

   447

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

   448

			MakeWater(tile);

   449

		}

   450

	}

   451

}

   452

   453

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

   454

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

   455

   456

static void GenerateTerrain(int type, int flag)

   457

{

   458

	uint32 r;

   459

	uint x;

   460

	uint y;

   461

	uint w;

   462

	uint h;

   463

	const Sprite* template;

   464

	const byte *p;

   465

	Tile* tile;

   466

	byte direction;

   467

   468

	r = Random();

   469

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

   470

   471

	x = r & MapMaxX();

   472

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

   473

   474

   475

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

   476

   477

	direction = GB(r, 22, 2);

   478

	if (direction & 1) {

   479

		w = template->height;

   480

		h = template->width;

   481

	} else {

   482

		w = template->width;

   483

		h = template->height;

   484

	}

   485

	p = template->data;

   486

   487

	if (flag & 4) {

   488

		uint xw = x * MapSizeY();

   489

		uint yw = y * MapSizeX();

   490

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

   491

   492

		switch (flag & 3) {

   493

			case 0:

   494

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

   495

				break;

   496

   497

			case 1:

   498

				if (yw < xw + bias) return;

   499

				break;

   500

   501

			case 2:

   502

				if (xw + yw < MapSize() + bias) return;

   503

				break;

   504