1

#include "stdafx.h"

     2

#include "openttd.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, TileIndex tile);

    56

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

    57

static void DoBuildTownHouse(Town *t, TileIndex 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 - (_m[ti->tile].owner&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)_m[ti->tile].m4;

    95

		byte stage = _m[ti->tile].m3 >> 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(TileIndex tile)

   154

{

   155

	int old;

   156

	int i;

   157

	int a,b;

   158

   159

	if (_tick_counter & 3)

   160

		return;

   161

   163

   164

	if (!((old=_m[tile].owner)&0x80)) {

   165

		_m[tile].owner |= 0x80;

   166

   167

		do {

   168

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

   169

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

   170

   171

		_m[tile].m5 = (_m[tile].m5 & ~0x3F) | i;

   172

	}

   173

   174

	a = _m[tile].owner&0x7F;

   175

	b = (_m[tile].m5&0x3F) * 6;

   176

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

   177

	_m[tile].owner = (_m[tile].owner&0x80)|a;

   178

   179

	if (a == b) {

   180

		_m[tile].m5 &= 0x40;

   181

		_m[tile].owner &= 0x7F;

   182

		DeleteAnimatedTile(tile);

   183

	}

   184

   185

	MarkTileDirtyByTile(tile);

   186

}

   187

   188

static void UpdateTownRadius(Town *t);

   189

   190

static bool IsCloseToTown(TileIndex tile, uint dist)

   191

{

   192

	Town *t;

   193

   194

	FOR_ALL_TOWNS(t) {

   195

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

   196

			return true;

   197

	}

   198

	return false;

   199

}

   200

   201

static void MarkTownSignDirty(Town *t)

   202

{

   203

	MarkAllViewportsDirty(

   204

		t->sign.left-6,

   205

		t->sign.top-3,

   206

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

   207

		t->sign.top + 45

   208

	);

   209

}

   210

   211

void UpdateTownVirtCoord(Town *t)

   212

{

   213

	Point pt;

   214

   215

	MarkTownSignDirty(t);

   216

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

   217

	SetDParam(0, t->townnametype);

   218

	SetDParam(1, t->townnameparts);

   219

	SetDParam(2, t->population);

   220

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

   221

	MarkTownSignDirty(t);

   222

}

   223

   224

static void ChangePopulation(Town *t, int mod)

   225

{

   226

	t->population += mod;

   227

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   228

	UpdateTownVirtCoord(t);

   229

   230

	if (_town_sort_order & 2) _town_sort_dirty = true;

   231

}

   232

   233

uint32 GetWorldPopulation(void)

   234

{

   235

	uint32 pop;

   236

	Town *t;

   237

	pop = 0;

   238

	FOR_ALL_TOWNS(t) {

   239

			pop += t->population;

   240

	}

   241

	return pop;

   242

}

   243

   244

static void MakeSingleHouseBigger(TileIndex tile)

   245

{

   246

	byte b;

   247

   248

	assert(IsTileType(tile, MP_HOUSE));

   249

   250

	b = _m[tile].m5;

   251

	if (b & 0x80)

   252

		return;

   253

   254

	_m[tile].m5 = (b & 0xC0) | ((b+1)&7);

   255

   256

	if ((_m[tile].m5&7) != 0)

   257

		return;

   258

   259

	_m[tile].m3 = _m[tile].m3 + 0x40;

   260

   261

	if ( (_m[tile].m3 & 0xC0) == 0xC0) {

   262

		ChangePopulation(GetTown(_m[tile].m2), _housetype_population[_m[tile].m4]);

   263

	}

   264

	MarkTileDirtyByTile(tile);

   265

}

   266

   267

static void MakeTownHouseBigger(TileIndex tile)

   268

{

   269

	uint flags = _house_more_flags[_m[tile].m4];

   270

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

   271

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

   272

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

   273

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

   274

}

   275

   276

static void TileLoop_Town(TileIndex tile)

   277

{

   278

	int house;

   279

	Town *t;

   280

	uint32 r;

   281

   282

	if ((_m[tile].m3 & 0xC0) != 0xC0) {

   283

		MakeTownHouseBigger(tile);

   284

		return;

   285

	}

   286

   287

	house = _m[tile].m4;

   288

	if (_housetype_extra_flags[house] & 0x20 &&

   289

			!(_m[tile].m5 & 0x80) &&

   290

			CHANCE16(1,2) &&

   291

			AddAnimatedTile(tile)) {

   292

		_m[tile].m5 = (_m[tile].m5 & 0x40)|0x80;

   293

	}

   294

   295

	t = GetTown(_m[tile].m2);

   296

   297

	r = Random();

   298

   299

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

   300

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

   301

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

   302

		t->new_max_pass += amt;

   303

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

   304

		t->new_act_pass += moved;

   305

	}

   306

   307

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

   308

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

   309

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

   310

		t->new_max_mail += amt;

   311

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

   312

		t->new_act_mail += moved;

   313

	}

   314

   315

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

   316

		r>>=16;

   317

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

   318

   319

		_current_player = OWNER_TOWN;

   320

   321

		ClearTownHouse(t, tile);

   322

   323

		// rebuild with another house?

   324

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

   325

			DoBuildTownHouse(t, tile);

   326

		}

   327

   328

		_current_player = OWNER_NONE;

   329

	}

   330

}

   331

   332

static void ClickTile_Town(TileIndex tile)

   333

{

   334

	/* not used */

   335

}

   336

   337

static int32 ClearTile_Town(TileIndex tile, byte flags)

   338

{

   339

	int house, rating;

   340

	int32 cost;

   341

	Town *t;

   342

   343

	// safety checks

   344

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   345

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

   346

   347

	house = _m[tile].m4;

   348

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

   349

   350

	rating = _housetype_remove_ratingmod[house];

   351

	_cleared_town_rating += rating;

   352

	_cleared_town = t = GetTown(_m[tile].m2);

   353

   354

	if (_current_player < MAX_PLAYERS) {

   355

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

   356

			SetDParam(0, t->index);

   357

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   358

		}

   359

	}

   360

   361

	if (flags & DC_EXEC) {

   362

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   363

		ClearTownHouse(t, tile);

   364

	}

   365

   366

	return cost;

   367

}

   368

   369

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   370

{

   371

	int type = _m[tile].m4;

   372

   373

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   374

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   375

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   376

	ac[CT_FOOD] = _housetype_cargo_food[type];

   377

}

   378

   379

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   380

{

   381

	td->str = _town_tile_names[_m[tile].m4];

   382

	if ((_m[tile].m3 & 0xC0) != 0xC0) {

   383

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

   384

		td->str = STR_2058_UNDER_CONSTRUCTION;

   385

	}

   386

   387

	td->owner = OWNER_TOWN;

   388

}

   389

   390

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   391

{

   392

	/* not used */

   393

	return 0;

   394

}

   395

   396

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

   397

{

   398

	/* not used */

   399

}

   400

   401

   402

static const TileIndexDiffC _roadblock_tileadd[] = {

   403

	{ 0, -1},

   404

	{ 1,  0},

   405

	{ 0,  1},

   406

	{-1,  0},

   407

   408

	// Store the first 3 elements again.

   409

	// Lets us rotate without using &3.

   410

	{ 0, -1},

   411

	{ 1,  0},

   412

	{ 0,  1}

   413

};

   414

   415

static void TownTickHandler(Town *t)

   416

{

   417

	if (t->flags12&1) {

   418

		int i = t->grow_counter - 1;

   419

		if (i < 0) {

   420

			if (GrowTown(t)) {

   421

				i = t->growth_rate;

   422

			} else {

   423

				i = 0;

   424

			}

   425

		}

   426

		t->grow_counter = i;

   427

	}

   428

   429

	UpdateTownRadius(t);

   430

}

   431

   432

void OnTick_Town(void)

   433

{

   434

	if (_game_mode == GM_EDITOR)

   435

		return;

   436

   437

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

   438

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

   439

	for (_cur_town_iter += GetTownPoolSize();

   440

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   441

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   442

		uint32 i = _cur_town_ctr;

   443

		Town *t;

   444

   445

		if (++_cur_town_ctr >= GetTownPoolSize())

   446

			_cur_town_ctr = 0;

   447

   448

		t = GetTown(i);

   449

   450

		if (t->xy != 0)

   451

			TownTickHandler(t);

   452

	}

   453

}

   454

   455

static byte GetTownRoadMask(TileIndex tile)

   456

{

   457

	byte b = GetRoadBitsByTile(tile);

   458

	byte r=0;

   459

	if (b&1) r|=10;

   460

	if (b&2) r|=5;

   461

	if (b&4) r|=9;

   462

	if (b&8) r|=6;

   463

	if (b&16) r|=3;

   464

	if (b&32) r|=12;

   465

	return r;

   466

}

   467

   468

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   469

{

   470

	uint k;

   471

	uint slope;

   472

   473

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

   474

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

   475

	TILE_ASSERT(tile);

   476

   477

	for(;;) {

   478

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

   479

		if (GetRoadBitsByTile(tile) == 0) {

   480

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

   481

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

   482

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

   483

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

   484

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

   485

				return false;

   486

		}

   487

   488

		slope = GetTileSlope(tile, NULL);

   489

		if (slope == 0) {

   490

no_slope:

   491

			// Tile has no slope

   492

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

   493

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

   494

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

   495

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

   496

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

   497

				return false;

   498

   499

			// Otherwise allow

   500

			return true;

   501

		}

   502

   503

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

   504

		// maybe terraform some.

   505

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