1

#include "stdafx.h"

     2

#include "ttd.h"

     4

#include "table/strings.h"

     5

#include "map.h"

     6

#include "tile.h"

     7

#include "viewport.h"

     8

#include "town.h"

     9

#include "command.h"

    10

#include "pathfind.h"

    11

#include "gfx.h"

    12

#include "industry.h"

    13

#include "station.h"

    14

#include "player.h"

    15

#include "news.h"

    16

#include "saveload.h"

    17

#include "economy.h"

    18

#include "gui.h"

    19

#include "network.h"

    20

    21

enum {

    22

	/* Max towns: 64000 (8 * 8000) */

    23

	TOWN_POOL_BLOCK_SIZE_BITS = 3,       /* In bits, so (1 << 3) == 8 */

    24

	TOWN_POOL_MAX_BLOCKS      = 8000,

    25

};

    26

    27

/**

    28

 * Called if a new block is added to the town-pool

    29

 */

    30

static void TownPoolNewBlock(uint start_item)

    31

{

    32

	Town *t;

    33

    34

	FOR_ALL_TOWNS_FROM(t, start_item)

    35

		t->index = start_item++;

    36

}

    37

    38

/* Initialize the town-pool */

    39

MemoryPool _town_pool = { "Towns", TOWN_POOL_MAX_BLOCKS, TOWN_POOL_BLOCK_SIZE_BITS, sizeof(Town), &TownPoolNewBlock, 0, 0, NULL };

    40

    41

    42

enum {

    43

	TOWN_HAS_CHURCH     = 0x02,

    44

	TOWN_HAS_STADIUM    = 0x04

    45

};

    46

    47

// Local

    48

static int _grow_town_result;

    49

    50

static bool BuildTownHouse(Town *t, uint tile);

    51

static void ClearTownHouse(Town *t, uint tile);

    52

static void DoBuildTownHouse(Town *t, uint tile);

    53

    54

typedef struct DrawTownTileStruct {

    55

	uint32 sprite_1;

    56

	uint32 sprite_2;

    57

    58

	byte subtile_x:4;

    59

	byte subtile_y:4;

    60

	byte width:4;

    61

	byte height:4;

    62

	byte dz;

    63

	byte proc;

    64

} DrawTownTileStruct;

    65

    66

#include "table/town_land.h"

    67

    68

    69

static void TownDrawTileProc1(TileInfo *ti)

    70

{

    71

	AddChildSpriteScreen(0x5A3, 0xE, 0x3C - (_map_owner[ti->tile]&0x7F));

    72

}

    73

    74

typedef void TownDrawTileProc(TileInfo *ti);

    75

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    76

	TownDrawTileProc1

    77

};

    78

    79

    80

static void DrawTile_Town(TileInfo *ti)

    81

{

    82

	const DrawTownTileStruct *dcts;

    83

	byte z;

    84

	uint32 image;

    85

    86

	/* Retrieve pointer to the draw town tile struct */

    87

	{

    88

		/* this "randomizes" on the (up to) 4 variants of a building */

    89

		byte gfx   = (byte)_map3_hi[ti->tile];

    90

		byte stage = _map3_lo[ti->tile] >> 6;

    91

		uint variant;

    92

		variant  = ti->x >> 4;

    93

		variant ^= ti->x >> 6;

    94

		variant ^= ti->y >> 4;

    95

		variant -= ti->y >> 6;

    96

		variant &= 3;

    97

		dcts = &_town_draw_tile_data[gfx << 4 | variant << 2 | stage];

    98

	}

    99

   100

	z = ti->z;

   101

   102

	/* Add bricks below the house? */

   103

	if (ti->tileh) {

   104

		AddSortableSpriteToDraw(0x3DD + ti->tileh, ti->x, ti->y, 16, 16, 7, z);

   105

		AddChildSpriteScreen(dcts->sprite_1, 0x1F, 1);

   106

		z += 8;

   107

	} else {

   108

		/* Else draw regular ground */

   109

		DrawGroundSprite(dcts->sprite_1);

   110

	}

   111

   112

	/* Add a house on top of the ground? */

   113

	if ((image = dcts->sprite_2) != 0) {

   114

		if (_display_opt & DO_TRANS_BUILDINGS)

   115

			image = (image & 0x3FFF) | 0x3224000;

   116

   117

		AddSortableSpriteToDraw(image,

   118

			ti->x + dcts->subtile_x,

   119

			ti->y + dcts->subtile_y,

   120

			dcts->width + 1,

   121

			dcts->height + 1,

   122

			dcts->dz,

   123

			z);

   124

   125

		if (_display_opt & DO_TRANS_BUILDINGS)

   126

			return;

   127

	}

   128

   129

	{

   130

		int proc;

   131

		if ((proc=dcts->proc-1) >= 0 )

   132

			_town_draw_tile_procs[proc](ti);

   133

	}

   134

}

   135

   136

static uint GetSlopeZ_Town(TileInfo *ti)

   137

{

   138

	uint z = GetPartialZ(ti->x&0xF, ti->y&0xF, ti->tileh) + ti->z;

   139

	if (ti->tileh != 0) z = (z & ~7) + 4;

   140

	return (uint16) z;

   141

}

   142

   143

static uint GetSlopeTileh_Town(TileInfo *ti)

   144

{

   145

	return ti->tileh;

   146

}

   147

   148

static void AnimateTile_Town(uint tile)

   149

{

   150

	int old;

   151

	int i;

   152

	int a,b;

   153

   154

	if (_tick_counter & 3)

   155

		return;

   156

   157

	if (_map3_hi[tile] != 4 && _map3_hi[tile] != 5)

   158

		return;

   159

   160

	if (!((old=_map_owner[tile])&0x80)) {

   161

		_map_owner[tile] |= 0x80;

   162

   163

		do {

   164

			i = (Random()&7) - 1;

   165

		} while (i < 0 || i == 1 || i*6==old);

   166

   167

		_map5[tile] = (_map5[tile] & ~0x3F) | i;

   168

	}

   169

   170

	a = _map_owner[tile]&0x7F;

   171

	b = (_map5[tile]&0x3F) * 6;

   172

	a += (a < b) ? 1 : -1;

   173

	_map_owner[tile] = (_map_owner[tile]&0x80)|a;

   174

   175

	if (a == b) {

   176

		_map5[tile] &= 0x40;

   177

		_map_owner[tile] &= 0x7F;

   178

		DeleteAnimatedTile(tile);

   179

	}

   180

   181

	MarkTileDirtyByTile(tile);

   182

}

   183

   184

static void UpdateTownRadius(Town *t);

   185

   186

static bool IsCloseToTown(uint tile, uint dist)

   187

{

   188

	Town *t;

   189

   190

	FOR_ALL_TOWNS(t) {

   191

		if (t->xy != 0 && DistanceManhattan(tile, t->xy) < dist)

   192

			return true;

   193

	}

   194

	return false;

   195

}

   196

   197

static void MarkTownSignDirty(Town *t)

   198

{

   199

	MarkAllViewportsDirty(

   200

		t->sign.left-6,

   201

		t->sign.top-3,

   202

		t->sign.left+t->sign.width_1*4+12,

   203

		t->sign.top + 45

   204

	);

   205

}

   206

   207

void UpdateTownVirtCoord(Town *t)

   208

{

   209

	Point pt;

   210

   211

	MarkTownSignDirty(t);

   212

	pt = RemapCoords2(TileX(t->xy) * 16, TileY(t->xy) * 16);

   213

	SetDParam(0, t->townnametype);

   214

	SetDParam(1, t->townnameparts);

   215

	SetDParam(2, t->population);

   216

	UpdateViewportSignPos(&t->sign, pt.x, pt.y - 24, _patches.population_in_label ? STR_TOWN_LABEL_POP : STR_2001);

   217

	MarkTownSignDirty(t);

   218

}

   219

   220

static void ChangePopulation(Town *t, int mod)

   221

{

   222

	t->population += mod;

   223

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   224

	UpdateTownVirtCoord(t);

   225

   226

	if (_town_sort_order & 2) _town_sort_dirty = true;

   227

}

   228

   229

uint32 GetWorldPopulation(void)

   230

{

   231

	uint32 pop;

   232

	Town *t;

   233

	pop = 0;

   234

	FOR_ALL_TOWNS(t) {

   235

			pop += t->population;

   236

	}

   237

	return pop;

   238

}

   239

   240

static void MakeSingleHouseBigger(uint tile)

   241

{

   242

	byte b;

   243

   244

	assert(IsTileType(tile, MP_HOUSE));

   245

   246

	b = _map5[tile];

   247

	if (b & 0x80)

   248

		return;

   249

   250

	_map5[tile] = (b & 0xC0) | ((b+1)&7);

   251

   252

	if ((_map5[tile]&7) != 0)

   253

		return;

   254

   255

	_map3_lo[tile] = _map3_lo[tile] + 0x40;

   256

   257

	if ( (_map3_lo[tile] & 0xC0) == 0xC0) {

   258

		ChangePopulation(GetTown(_map2[tile]), _housetype_population[_map3_hi[tile]]);

   259

	}

   260

	MarkTileDirtyByTile(tile);

   261

}

   262

   263

static void MakeTownHouseBigger(uint tile)

   264

{

   265

	uint flags = _house_more_flags[_map3_hi[tile]];

   266

	if (flags & 8) MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 0));

   267

	if (flags & 4) MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 1));

   268

	if (flags & 2) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 0));

   269

	if (flags & 1) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 1));

   270

}

   271

   272

static void TileLoop_Town(uint tile)

   273

{

   274

	int house;

   275

	Town *t;

   276

	uint32 r;

   277

   278

	if ((_map3_lo[tile] & 0xC0) != 0xC0) {

   279

		MakeTownHouseBigger(tile);

   280

		return;

   281

	}

   282

   283

	house = _map3_hi[tile];

   284

	if (_housetype_extra_flags[house] & 0x20 &&

   285

			!(_map5[tile] & 0x80) &&

   286

			CHANCE16(1,2) &&

   287

			AddAnimatedTile(tile)) {

   288

		_map5[tile] = (_map5[tile] & 0x40)|0x80;

   289

	}

   290

   291

	t = GetTown(_map2[tile]);

   292

   293

	r = Random();

   294

   295

	if ( (byte)r < _housetype_population[house] ) {

   296

		uint amt = ((byte)r >> 3) + 1, moved;

   297

		if (_economy.fluct <= 0) amt = (amt + 1) >> 1;

   298

		t->new_max_pass += amt;

   299

		moved = MoveGoodsToStation(tile, 1, 1, CT_PASSENGERS, amt);

   300

		t->new_act_pass += moved;

   301

	}

   302

   303

	if ( (byte)(r>>8) < _housetype_mailamount[house] ) {

   304

		uint amt = ((byte)(r>>8) >> 3) + 1, moved;

   305

		if (_economy.fluct <= 0) amt = (amt + 1) >> 1;

   306

		t->new_max_mail += amt;

   307

		moved = MoveGoodsToStation(tile, 1, 1, CT_MAIL, amt);

   308

		t->new_act_mail += moved;

   309

	}

   310

   311

	if (_house_more_flags[house]&8 && (t->flags12&1) && --t->time_until_rebuild == 0) {

   312

		r>>=16;

   313

		t->time_until_rebuild = (r & 63) + 130;

   314

   315

		_current_player = OWNER_TOWN;

   316

   317

		ClearTownHouse(t, tile);

   318

   319

		// rebuild with another house?

   320

		if ( (byte) (r >> 8) >= 12) {

   321

			DoBuildTownHouse(t, tile);

   322

		}

   323

   324

		_current_player = OWNER_NONE;

   325

	}

   326

}

   327

   328

static void ClickTile_Town(uint tile)

   329

{

   330

	/* not used */

   331

}

   332

   333

static int32 ClearTile_Town(uint tile, byte flags)

   334

{

   335

	int house, rating;

   336

	int32 cost;

   337

	Town *t;

   338

   339

	// safety checks

   340

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   341

	if (flags&DC_AUTO && !(flags&DC_AI_BUILDING)) return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);

   342

   343

	house = _map3_hi[tile];

   344

	cost = _price.remove_house * _housetype_remove_cost[house] >> 8;

   345

   346

	rating = _housetype_remove_ratingmod[house];

   347

	_cleared_town_rating += rating;

   348

	_cleared_town = t = GetTown(_map2[tile]);

   349

   350

	if (_current_player < MAX_PLAYERS) {

   351

		if (rating > t->ratings[_current_player] && !(flags & DC_NO_TOWN_RATING) && !_cheats.magic_bulldozer.value) {

   352

			SetDParam(0, t->index);

   353

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   354

		}

   355

	}

   356

   357

	if (flags & DC_EXEC) {

   358

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   359

		ClearTownHouse(t, tile);

   360

	}

   361

   362

	return cost;

   363

}

   364

   365

static void GetAcceptedCargo_Town(uint tile, AcceptedCargo ac)

   366

{

   367

	int type = _map3_hi[tile];

   368

   369

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   370

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   371

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   372

	ac[CT_FOOD] = _housetype_cargo_food[type];

   373

}

   374

   375

static void GetTileDesc_Town(uint tile, TileDesc *td)

   376

{

   377

	td->str = _town_tile_names[_map3_hi[tile]];

   378

	if ((_map3_lo[tile] & 0xC0) != 0xC0) {

   379

		SetDParamX(td->dparam, 0, td->str);

   380

		td->str = STR_2058_UNDER_CONSTRUCTION;

   381

	}

   382

   383

	td->owner = OWNER_TOWN;

   384

}

   385

   386

static uint32 GetTileTrackStatus_Town(uint tile, TransportType mode)

   387

{

   388

	/* not used */

   389

	return 0;

   390

}

   391

   392

static void ChangeTileOwner_Town(uint tile, byte old_player, byte new_player)

   393

{

   394

	/* not used */

   395

}

   396

   397

   398

static const TileIndexDiffC _roadblock_tileadd[] = {

   399

	{ 0, -1},

   400

	{ 1,  0},

   401

	{ 0,  1},

   402

	{-1,  0},

   403

   404

	// Store the first 3 elements again.

   405

	// Lets us rotate without using &3.

   406

	{ 0, -1},

   407

	{ 1,  0},

   408

	{ 0,  1}

   409

};

   410

   411

static void TownTickHandler(Town *t)

   412

{

   413

	if (t->flags12&1) {

   414

		int i = t->grow_counter - 1;

   415

		if (i < 0) {

   416

			if (GrowTown(t)) {

   417

				i = t->growth_rate;

   418

			} else {

   419

				i = 0;

   420

			}

   421

		}

   422

		t->grow_counter = i;

   423

	}

   424

   425

	UpdateTownRadius(t);

   426

}

   427

   428

void OnTick_Town(void)

   429

{

   430

	uint i;

   431

	Town *t;

   432

   433

	if (_game_mode == GM_EDITOR)

   434

		return;

   435

   436

	i = _cur_town_ctr;

   437

	if (++_cur_town_ctr >= GetTownPoolSize())

   438

		_cur_town_ctr = 0;

   439

   440

	t = GetTown(i);

   441

   442

	if (t->xy != 0)

   443

		TownTickHandler(t);

   444

}

   445

   446

static byte GetTownRoadMask(TileIndex tile)

   447

{

   448

	byte b = GetRoadBitsByTile(tile);

   449

	byte r=0;

   450

	if (b&1) r|=10;

   451

	if (b&2) r|=5;

   452

	if (b&4) r|=9;

   453

	if (b&8) r|=6;

   454

	if (b&16) r|=3;

   455

	if (b&32) r|=12;

   456

	return r;

   457

}

   458

   459

static bool IsRoadAllowedHere(uint tile, int dir)

   460

{

   461

	uint k;

   462

	uint slope;

   463

   464

	// If this assertion fails, it might be because the world contains

   465

	//  land at the edges. This is not ok.

   466

	TILE_ASSERT(tile);

   467

   468

	for(;;) {

   469

		// Check if there already is a road at this point?

   470

		if (GetRoadBitsByTile(tile) == 0) {

   471

			// No, try to build one in the direction.

   472

			// if that fails clear the land, and if that fails exit.

   473

			// This is to make sure that we can build a road here later.

   474

			if (DoCommandByTile(tile, (dir&1)?0xA:0x5, 0, DC_AUTO, CMD_BUILD_ROAD) == CMD_ERROR &&

   475

					DoCommandByTile(tile, 0, 0, DC_AUTO, CMD_LANDSCAPE_CLEAR) == CMD_ERROR)

   476

				return false;

   477

		}

   478

   479

		slope = GetTileSlope(tile, NULL);

   480

		if (slope == 0) {

   481

no_slope:

   482

			// Tile has no slope

   483

			// Disallow the road if any neighboring tile has a road.

   484

			if (HASBIT(GetTownRoadMask(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[dir+1]))), dir^2) ||

   485

					HASBIT(GetTownRoadMask(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[dir+3]))), dir^2) ||

   486

					HASBIT(GetTownRoadMask(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[dir+1]) + ToTileIndexDiff(_roadblock_tileadd[dir+2]))), dir) ||

   487

					HASBIT(GetTownRoadMask(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[dir+3]) + ToTileIndexDiff(_roadblock_tileadd[dir+2]))), dir))

   488

				return false;

   489

   490

			// Otherwise allow

   491

			return true;

   492

		}

   493

   494

		// If the tile is not a slope in the right direction, then

   495

		// maybe terraform some.

   496

		if ((k = (dir&1)?0xC:0x9) != slope && (k^0xF) != slope) {

   497

			uint32 r = Random();

   498

   499

			if (CHANCE16I(1,8, r) && !_generating_world) {

   500

				int32 res;

   501

   502

				if (CHANCE16I(1,16,r))

   503

					res = DoCommandByTile(tile, slope, 0, DC_EXEC | DC_AUTO | DC_NO_WATER,

   504

					                      CMD_TERRAFORM_LAND);

   505

				else

   506

					res = DoCommandByTile(tile, slope^0xF, 1, DC_EXEC | DC_AUTO | DC_NO_WATER,

   507

					                      CMD_TERRAFORM_LAND);

   508

				if (res == CMD_ERROR && CHANCE16I(1,3,r))

   509

					// We can consider building on the slope, though.

   510

					goto no_slope;

   511

			}