1

#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "strings.h"

     4

#include "table/strings.h"

     6

#include "map.h"

     7

#include "tile.h"

     8

#include "viewport.h"

     9

#include "town.h"

    10

#include "command.h"

    11

#include "pathfind.h"

    12

#include "gfx.h"

    13

#include "industry.h"

    14

#include "station.h"

    15

#include "player.h"

    16

#include "news.h"

    17

#include "saveload.h"

    18

#include "economy.h"

    19

#include "gui.h"

    20

#include "network.h"

    21

    22

enum {

    23

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

    24

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

    25

	TOWN_POOL_MAX_BLOCKS      = 8000,

    26

};

    27

    28

/**

    29

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

    30

 */

    31

static void TownPoolNewBlock(uint start_item)

    32

{

    33

	Town *t;

    34

    35

	FOR_ALL_TOWNS_FROM(t, start_item)

    36

		t->index = start_item++;

    37

}

    38

    39

/* Initialize the town-pool */

    40

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

    41

    42

    43

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

    44

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

    45

 * are then scaled based on that. */

    46

#define TOWN_GROWTH_FREQUENCY 23

    47

    48

enum {

    49

	TOWN_HAS_CHURCH     = 0x02,

    50

	TOWN_HAS_STADIUM    = 0x04

    51

};

    52

    53

// Local

    54

static int _grow_town_result;

    55

    56

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

    57

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

    58

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

    59

    60

typedef struct DrawTownTileStruct {

    61

	uint32 sprite_1;

    62

	uint32 sprite_2;

    63

    64

	byte subtile_x:4;

    65

	byte subtile_y:4;

    66

	byte width:4;

    67

	byte height:4;

    68

	byte dz;

    69

	byte proc;

    70

} DrawTownTileStruct;

    71

    72

#include "table/town_land.h"

    73

    74

    75

static void TownDrawHouseLift(TileInfo *ti)

    76

{

    77

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

    78

}

    79

    80

typedef void TownDrawTileProc(TileInfo *ti);

    81

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    82

	TownDrawHouseLift

    83

};

    84

    85

    86

static void DrawTile_Town(TileInfo *ti)

    87

{

    88

	const DrawTownTileStruct *dcts;

    89

	byte z;

    90

	uint32 image;

    91

    92

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

    93

	{

    94

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

    95

		byte gfx   = (byte)_m[ti->tile].m4;

    96

		byte stage = _m[ti->tile].m3 >> 6;

    97

		uint variant;

    98

		variant  = ti->x >> 4;

    99

		variant ^= ti->x >> 6;

   100

		variant ^= ti->y >> 4;

   101

		variant -= ti->y >> 6;

   102

		variant &= 3;

   103

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

   104

	}

   105

   106

	z = ti->z;

   107

   108

	/* Add bricks below the house? */

   109

	if (ti->tileh) {

   110

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

   111

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

   112

		z += 8;

   113

	} else {

   114

		/* Else draw regular ground */

   115

		DrawGroundSprite(dcts->sprite_1);

   116

	}

   117

   118

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

   119

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

   120

		if (_display_opt & DO_TRANS_BUILDINGS)

   122

   123

		AddSortableSpriteToDraw(image,

   124

			ti->x + dcts->subtile_x,

   125

			ti->y + dcts->subtile_y,

   126

			dcts->width + 1,

   127

			dcts->height + 1,

   128

			dcts->dz,

   129

			z);

   130

   131

		if (_display_opt & DO_TRANS_BUILDINGS)

   132

			return;

   133

	}

   134

   135

	{

   136

		int proc;

   137

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

   138

			_town_draw_tile_procs[proc](ti);

   139

	}

   140

}

   141

   142

static uint GetSlopeZ_Town(TileInfo *ti)

   143

{

   144

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

   145

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

   146

	return (uint16) z;

   147

}

   148

   149

static uint GetSlopeTileh_Town(TileInfo *ti)

   150

{

   151

	return ti->tileh;

   152

}

   153

   154

static void AnimateTile_Town(TileIndex tile)

   155

{

   156

	int old;

   157

	int i;

   158

	int a,b;

   159

   160

	if (_tick_counter & 3)

   161

		return;

   162

   163

	// If the house is not one with a lift anymore, then stop this animating.

   164

	// Not exactly sure when this happens, but probably when a house changes.

   165

	// Before this was just a return...so it'd leak animated tiles..

   166

	// That bug seems to have been here since day 1??

   167

	if (!(_housetype_extra_flags[_m[tile].m4] & 0x20)) {

   168

		DeleteAnimatedTile(tile);

   169

		return;

   170

	}

   171

   172

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

   173

		_m[tile].owner |= 0x80;

   174

   175

		do {

   176

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

   177

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

   178

   179

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

   180

	}

   181

   182

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

   183

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

   184

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

   185

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

   186

   187

	if (a == b) {

   188

		_m[tile].m5 &= 0x40;

   189

		_m[tile].owner &= 0x7F;

   190

		DeleteAnimatedTile(tile);

   191

	}

   192

   193

	MarkTileDirtyByTile(tile);

   194

}

   195

   196

static void UpdateTownRadius(Town *t);

   197

   198

static bool IsCloseToTown(TileIndex tile, uint dist)

   199

{

   200

	Town *t;

   201

   202

	FOR_ALL_TOWNS(t) {

   203

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

   204

			return true;

   205

	}

   206

	return false;

   207

}

   208

   209

static void MarkTownSignDirty(Town *t)

   210

{

   211

	MarkAllViewportsDirty(

   212

		t->sign.left-6,

   213

		t->sign.top-3,

   214

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

   215

		t->sign.top + 45

   216

	);

   217

}

   218

   219

void UpdateTownVirtCoord(Town *t)

   220

{

   221

	Point pt;

   222

   223

	MarkTownSignDirty(t);

   224

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

   225

	SetDParam(0, t->index);

   226

	SetDParam(1, t->population);

   227

	UpdateViewportSignPos(&t->sign, pt.x, pt.y - 24,

   228

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   229

	MarkTownSignDirty(t);

   230

}

   231

   232

static void ChangePopulation(Town *t, int mod)

   233

{

   234

	t->population += mod;

   235

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   236

	UpdateTownVirtCoord(t);

   237

   238

	if (_town_sort_order & 2) _town_sort_dirty = true;

   239

}

   240

   241

uint32 GetWorldPopulation(void)

   242

{

   243

	uint32 pop;

   244

	Town *t;

   245

	pop = 0;

   246

	FOR_ALL_TOWNS(t) {

   247

			pop += t->population;

   248

	}

   249

	return pop;

   250

}

   251

   252

static void MakeSingleHouseBigger(TileIndex tile)

   253

{

   254

	byte b;

   255

   256

	assert(IsTileType(tile, MP_HOUSE));

   257

   258

	b = _m[tile].m5;

   259

	if (b & 0x80)

   260

		return;

   261

   262

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

   263

   264

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

   265

		return;

   266

   267

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

   268

   269

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

   270

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

   271

	}

   272

	MarkTileDirtyByTile(tile);

   273

}

   274

   275

static void MakeTownHouseBigger(TileIndex tile)

   276

{

   277

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

   278

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

   279

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

   280

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

   281

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

   282

}

   283

   284

static void TileLoop_Town(TileIndex tile)

   285

{

   286

	int house;

   287

	Town *t;

   288

	uint32 r;

   289

   290

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

   291

		MakeTownHouseBigger(tile);

   292

		return;

   293

	}

   294

   295

	house = _m[tile].m4;

   296

	if (_housetype_extra_flags[house] & 0x20 &&

   297

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

   298

			CHANCE16(1,2) &&

   299

			AddAnimatedTile(tile)) {

   300

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

   301

	}

   302

   303

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

   304

   305

	r = Random();

   306

   307

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

   308

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

   309

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

   310

		t->new_max_pass += amt;

   311

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

   312

		t->new_act_pass += moved;

   313

	}

   314

   315

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

   316

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

   317

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

   318

		t->new_max_mail += amt;

   319

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

   320

		t->new_act_mail += moved;

   321

	}

   322

   323

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

   324

		r>>=16;

   325

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

   326

   327

		_current_player = OWNER_TOWN;

   328

   329

		ClearTownHouse(t, tile);

   330

   331

		// rebuild with another house?

   332

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

   333

			DoBuildTownHouse(t, tile);

   334

		}

   335

   336

		_current_player = OWNER_NONE;

   337

	}

   338

}

   339

   340

static void ClickTile_Town(TileIndex tile)

   341

{

   342

	/* not used */

   343

}

   344

   345

static int32 ClearTile_Town(TileIndex tile, byte flags)

   346

{

   347

	int house, rating;

   348

	int32 cost;

   349

	Town *t;

   350

   351

	// safety checks

   352

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   353

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

   354

   355

	house = _m[tile].m4;

   356

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

   357

   358

	rating = _housetype_remove_ratingmod[house];

   359

	_cleared_town_rating += rating;

   360

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

   361

   362

	if (_current_player < MAX_PLAYERS) {

   363

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

   364

			SetDParam(0, t->index);

   365

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   366

		}

   367

	}

   368

   369

	if (flags & DC_EXEC) {

   370

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   371

		ClearTownHouse(t, tile);

   372

	}

   373

   374

	return cost;

   375

}

   376

   377

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   378

{

   379

	int type = _m[tile].m4;

   380

   381

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   382

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   383

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   384

	ac[CT_FOOD] = _housetype_cargo_food[type];

   385

}

   386

   387

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   388

{

   389

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

   390

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

   391

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

   392

		td->str = STR_2058_UNDER_CONSTRUCTION;

   393

	}

   394

   395

	td->owner = OWNER_TOWN;

   396

}

   397

   398

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   399

{

   400

	/* not used */

   401

	return 0;

   402

}

   403

   404

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

   405

{

   406

	/* not used */

   407

}

   408

   409

   410

static const TileIndexDiffC _roadblock_tileadd[] = {

   411

	{ 0, -1},

   412

	{ 1,  0},

   413

	{ 0,  1},

   414

	{-1,  0},

   415

   416

	// Store the first 3 elements again.

   417

	// Lets us rotate without using &3.

   418

	{ 0, -1},

   419

	{ 1,  0},

   420

	{ 0,  1}

   421

};

   422

   423

static void TownTickHandler(Town *t)

   424

{

   425

	if (t->flags12&1) {

   426

		int i = t->grow_counter - 1;

   427

		if (i < 0) {

   428

			if (GrowTown(t)) {

   429

				i = t->growth_rate;

   430

			} else {

   431

				i = 0;

   432

			}

   433

		}

   434

		t->grow_counter = i;

   435

	}

   436

   437

	UpdateTownRadius(t);

   438

}

   439

   440

void OnTick_Town(void)

   441

{

   442

	if (_game_mode == GM_EDITOR)

   443

		return;

   444

   445

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

   446

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

   447

	for (_cur_town_iter += GetTownPoolSize();

   448

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   449

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   450

		uint32 i = _cur_town_ctr;

   451

		Town *t;

   452

   453

		if (++_cur_town_ctr >= GetTownPoolSize())

   454

			_cur_town_ctr = 0;

   455

   456

		t = GetTown(i);

   457

   458

		if (t->xy != 0)

   459

			TownTickHandler(t);

   460

	}

   461

}

   462

   463

static byte GetTownRoadMask(TileIndex tile)

   464

{

   465

	byte b = GetRoadBitsByTile(tile);

   466

	byte r=0;

   467

	if (b&1) r|=10;

   468

	if (b&2) r|=5;

   469

	if (b&4) r|=9;

   470

	if (b&8) r|=6;

   471

	if (b&16) r|=3;

   472

	if (b&32) r|=12;

   473

	return r;

   474

}

   475

   476

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   477

{

   478

	uint k;

   479

	uint slope;

   480

   481

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

   482

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

   483

	TILE_ASSERT(tile);

   484

   485

	for(;;) {

   486

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

   487

		if (GetRoadBitsByTile(tile) == 0) {

   488

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

   489

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

   490

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

   491

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

   492

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

   493

				return false;

   494

		}

   495

   496

		slope = GetTileSlope(tile, NULL);

   497

		if (slope == 0) {

   498

no_slope:

   499

			// Tile has no slope

   500

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

   501

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

   502

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

   503

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

   504

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

   505

				return false;