1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "strings.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

/* This is the base "normal" number of towns on the 8x8 map, when

    43

 * one town should get grown per tick. The other numbers of towns

    44

 * are then scaled based on that. */

    45

#define TOWN_GROWTH_FREQUENCY 23

    46

    47

enum {

    48

	TOWN_HAS_CHURCH     = 0x02,

    49

	TOWN_HAS_STADIUM    = 0x04

    50

};

    51

    52

// Local

    53

static int _grow_town_result;

    54

    55

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

    56

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

    57

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

    58

    59

typedef struct DrawTownTileStruct {

    60

	uint32 sprite_1;

    61

	uint32 sprite_2;

    62

    63

	byte subtile_x:4;

    64

	byte subtile_y:4;

    65

	byte width:4;

    66

	byte height:4;

    67

	byte dz;

    68

	byte proc;

    69

} DrawTownTileStruct;

    70

    71

#include "table/town_land.h"

    72

    73

    74

static void TownDrawTileProc1(TileInfo *ti)

    75

{

    76

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

    77

}

    78

    79

typedef void TownDrawTileProc(TileInfo *ti);

    80

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    81

	TownDrawTileProc1

    82

};

    83

    84

    85

static void DrawTile_Town(TileInfo *ti)

    86

{

    87

	const DrawTownTileStruct *dcts;

    88

	byte z;

    89

	uint32 image;

    90

    91

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

    92

	{

    93

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

    94

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

    95

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

    96

		uint variant;

    97

		variant  = ti->x >> 4;

    98

		variant ^= ti->x >> 6;

    99

		variant ^= ti->y >> 4;

   100

		variant -= ti->y >> 6;

   101

		variant &= 3;

   102

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

   103

	}

   104

   105

	z = ti->z;

   106

   107

	/* Add bricks below the house? */

   108

	if (ti->tileh) {

   109

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

   110

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

   111

		z += 8;

   112

	} else {

   113

		/* Else draw regular ground */

   114

		DrawGroundSprite(dcts->sprite_1);

   115

	}

   116

   117

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

   118

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

   119

		if (_display_opt & DO_TRANS_BUILDINGS)

   120

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

   121

   122

		AddSortableSpriteToDraw(image,

   123

			ti->x + dcts->subtile_x,

   124

			ti->y + dcts->subtile_y,

   125

			dcts->width + 1,

   126

			dcts->height + 1,

   127

			dcts->dz,

   128

			z);

   129

   130

		if (_display_opt & DO_TRANS_BUILDINGS)

   131

			return;

   132

	}

   133

   134

	{

   135

		int proc;

   136

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

   137

			_town_draw_tile_procs[proc](ti);

   138

	}

   139

}

   140

   141

static uint GetSlopeZ_Town(TileInfo *ti)

   142

{

   143

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

   144

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

   145

	return (uint16) z;

   146

}

   147

   148

static uint GetSlopeTileh_Town(TileInfo *ti)

   149

{

   150

	return ti->tileh;

   151

}

   152

   153

static void AnimateTile_Town(uint tile)

   154

{

   155

	int old;

   156

	int i;

   157

	int a,b;

   158

   159

	if (_tick_counter & 3)

   160

		return;

   161

   162

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

   163

		return;

   164

   165

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

   166

		_map_owner[tile] |= 0x80;

   167

   168

		do {

   169

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

   170

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

   171

   172

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

   173

	}

   174

   175

	a = _map_owner[tile]&0x7F;

   176

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

   177

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

   178

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

   179

   180

	if (a == b) {

   181

		_map5[tile] &= 0x40;

   182

		_map_owner[tile] &= 0x7F;

   183

		DeleteAnimatedTile(tile);

   184

	}

   185

   186

	MarkTileDirtyByTile(tile);

   187

}

   188

   189

static void UpdateTownRadius(Town *t);

   190

   191

static bool IsCloseToTown(uint tile, uint dist)

   192

{

   193

	Town *t;

   194

   195

	FOR_ALL_TOWNS(t) {

   196

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

   197

			return true;

   198

	}

   199

	return false;

   200

}

   201

   202

static void MarkTownSignDirty(Town *t)

   203

{

   204

	MarkAllViewportsDirty(

   205

		t->sign.left-6,

   206

		t->sign.top-3,

   207

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

   208

		t->sign.top + 45

   209

	);

   210

}

   211

   212

void UpdateTownVirtCoord(Town *t)

   213

{

   214

	Point pt;

   215

   216

	MarkTownSignDirty(t);

   217

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

   218

	SetDParam(0, t->townnametype);

   219

	SetDParam(1, t->townnameparts);

   220

	SetDParam(2, t->population);

   221

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

   222

	MarkTownSignDirty(t);

   223

}

   224

   225

static void ChangePopulation(Town *t, int mod)

   226

{

   227

	t->population += mod;

   228

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   229

	UpdateTownVirtCoord(t);

   230

   231

	if (_town_sort_order & 2) _town_sort_dirty = true;

   232

}

   233

   234

uint32 GetWorldPopulation(void)

   235

{

   236

	uint32 pop;

   237

	Town *t;

   238

	pop = 0;

   239

	FOR_ALL_TOWNS(t) {

   240

			pop += t->population;

   241

	}

   242

	return pop;

   243

}

   244

   245

static void MakeSingleHouseBigger(uint tile)

   246

{

   247

	byte b;

   248

   249

	assert(IsTileType(tile, MP_HOUSE));

   250

   251

	b = _map5[tile];

   252

	if (b & 0x80)

   253

		return;

   254

   255

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

   256

   257

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

   258

		return;

   259

   260

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

   261

   262

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

   263

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

   264

	}

   265

	MarkTileDirtyByTile(tile);

   266

}

   267

   268

static void MakeTownHouseBigger(uint tile)

   269

{

   270

	uint flags = _house_more_flags[_map3_hi[tile]];

   271

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

   272

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

   273

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

   274

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

   275

}

   276

   277

static void TileLoop_Town(uint tile)

   278

{

   279

	int house;

   280

	Town *t;

   281

	uint32 r;

   282

   283

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

   284

		MakeTownHouseBigger(tile);

   285

		return;

   286

	}

   287

   288

	house = _map3_hi[tile];

   289

	if (_housetype_extra_flags[house] & 0x20 &&

   290

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

   291

			CHANCE16(1,2) &&

   292

			AddAnimatedTile(tile)) {

   293

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

   294

	}

   295

   296

	t = GetTown(_map2[tile]);

   297

   298

	r = Random();

   299

   300

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

   301

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

   302

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

   303

		t->new_max_pass += amt;

   304

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

   305

		t->new_act_pass += moved;

   306

	}

   307

   308

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

   309

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

   310

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

   311

		t->new_max_mail += amt;

   312

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

   313

		t->new_act_mail += moved;

   314

	}

   315

   316

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

   317

		r>>=16;

   318

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

   319

   320

		_current_player = OWNER_TOWN;

   321

   322

		ClearTownHouse(t, tile);

   323

   324

		// rebuild with another house?

   325

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

   326

			DoBuildTownHouse(t, tile);

   327

		}

   328

   329

		_current_player = OWNER_NONE;

   330

	}

   331

}

   332

   333

static void ClickTile_Town(uint tile)

   334

{

   335

	/* not used */

   336

}

   337

   338

static int32 ClearTile_Town(uint tile, byte flags)

   339

{

   340

	int house, rating;

   341

	int32 cost;

   342

	Town *t;

   343

   344

	// safety checks

   345

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   346

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

   347

   348

	house = _map3_hi[tile];

   349

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

   350

   351

	rating = _housetype_remove_ratingmod[house];

   352

	_cleared_town_rating += rating;

   353

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

   354

   355

	if (_current_player < MAX_PLAYERS) {

   356

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

   357

			SetDParam(0, t->index);

   358

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   359

		}

   360

	}

   361

   362

	if (flags & DC_EXEC) {

   363

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   364

		ClearTownHouse(t, tile);

   365

	}

   366

   367

	return cost;

   368

}

   369

   370

static void GetAcceptedCargo_Town(uint tile, AcceptedCargo ac)

   371

{

   372

	int type = _map3_hi[tile];

   373

   374

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   375

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   376

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   377

	ac[CT_FOOD] = _housetype_cargo_food[type];

   378

}

   379

   380

static void GetTileDesc_Town(uint tile, TileDesc *td)

   381

{

   382

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

   383

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

   384

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

   385

		td->str = STR_2058_UNDER_CONSTRUCTION;

   386

	}

   387

   388

	td->owner = OWNER_TOWN;

   389

}

   390

   391

static uint32 GetTileTrackStatus_Town(uint tile, TransportType mode)

   392

{

   393

	/* not used */

   394

	return 0;

   395

}

   396

   397

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

   398

{

   399

	/* not used */

   400

}

   401

   402

   403

static const TileIndexDiffC _roadblock_tileadd[] = {

   404

	{ 0, -1},

   405

	{ 1,  0},

   406

	{ 0,  1},

   407

	{-1,  0},

   408

   409

	// Store the first 3 elements again.

   410

	// Lets us rotate without using &3.

   411

	{ 0, -1},

   412

	{ 1,  0},

   413

	{ 0,  1}

   414

};

   415

   416

static void TownTickHandler(Town *t)

   417

{

   418

	if (t->flags12&1) {

   419

		int i = t->grow_counter - 1;

   420

		if (i < 0) {

   421

			if (GrowTown(t)) {

   422

				i = t->growth_rate;

   423

			} else {

   424

				i = 0;

   425

			}

   426

		}

   427

		t->grow_counter = i;

   428

	}

   429

   430

	UpdateTownRadius(t);

   431

}

   432

   433

void OnTick_Town(void)

   434

{

   435

	static int counter;

   436

   437

	if (_game_mode == GM_EDITOR)

   438

		return;

   439

   440

	/* Make sure each town's tickhandler invocation frequency is about the

   441

	 * same - TOWN_GROWTH_FREQUENCY - independent on the number of towns. */

   442

	for (counter += GetTownPoolSize();

   443

	     counter >= TOWN_GROWTH_FREQUENCY;

   444

	     counter -= TOWN_GROWTH_FREQUENCY) {

   445

		int i = _cur_town_ctr;

   446

		Town *t;

   447

   448

		if (++_cur_town_ctr >= GetTownPoolSize())

   449

			_cur_town_ctr = 0;

   450

   451

		t = GetTown(i);

   452

   453

		if (t->xy != 0)

   454

			TownTickHandler(t);

   455

	}

   456

}

   457

   458

static byte GetTownRoadMask(TileIndex tile)

   459

{

   460

	byte b = GetRoadBitsByTile(tile);

   461

	byte r=0;

   462

	if (b&1) r|=10;

   463

	if (b&2) r|=5;

   464

	if (b&4) r|=9;

   465

	if (b&8) r|=6;

   466

	if (b&16) r|=3;

   467

	if (b&32) r|=12;

   468

	return r;

   469

}

   470

   471

static bool IsRoadAllowedHere(uint tile, int dir)

   472

{

   473

	uint k;

   474

	uint slope;

   475

   476

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

   477

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

   478

	TILE_ASSERT(tile);

   479

   480

	for(;;) {

   481

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

   482

		if (GetRoadBitsByTile(tile) == 0) {

   483

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

   484

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

   485

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

   486

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

   487

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

   488

				return false;

   489

		}

   490

   491

		slope = GetTileSlope(tile, NULL);

   492

		if (slope == 0) {

   493

no_slope:

   494

			// Tile has no slope

   495

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

   496

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

   497

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

   498

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

   499

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

   500

				return false;

   501

   502

			// Otherwise allow

   503

			return true;

   504

		}

   505

   506

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

   507

		// maybe terraform some.

   508

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

   509

			uint32 r = Random();

   510