1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "functions.h"

     6

#include "strings.h"

     7

#include "table/strings.h"

     8

#include "table/sprites.h"

     9

#include "map.h"

    10

#include "tile.h"

    11

#include "viewport.h"

    12

#include "town.h"

    13

#include "command.h"

    14

#include "pathfind.h"

    15

#include "gfx.h"

    16

#include "industry.h"

    17

#include "station.h"

    18

#include "player.h"

    19

#include "news.h"

    20

#include "saveload.h"

    21

#include "economy.h"

    22

#include "gui.h"

    23

#include "variables.h"

    24

    25

enum {

    26

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

    27

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

    28

	TOWN_POOL_MAX_BLOCKS      = 8000,

    29

};

    30

    31

/**

    32

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

    33

 */

    34

static void TownPoolNewBlock(uint start_item)

    35

{

    36

	Town *t;

    37

    38

	FOR_ALL_TOWNS_FROM(t, start_item)

    39

		t->index = start_item++;

    40

}

    41

    42

/* Initialize the town-pool */

    43

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

    44

    45

    46

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

    47

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

    48

 * are then scaled based on that. */

    49

#define TOWN_GROWTH_FREQUENCY 23

    50

    51

enum {

    52

	TOWN_HAS_CHURCH     = 0x02,

    53

	TOWN_HAS_STADIUM    = 0x04

    54

};

    55

    56

// Local

    57

static int _grow_town_result;

    58

    59

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

    60

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

    61

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

    62

    63

typedef struct DrawTownTileStruct {

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	SpriteID sprite_1;

    65

	SpriteID sprite_2;

    66

    67

	byte subtile_x:4;

    68

	byte subtile_y:4;

    69

	byte width:4;

    70

	byte height:4;

    71

	byte dz;

    72

	byte proc;

    73

} DrawTownTileStruct;

    74

    75

#include "table/town_land.h"

    76

    77

    78

static void TownDrawHouseLift(const TileInfo *ti)

    79

{

    80

	AddChildSpriteScreen(0x5A3, 0xE, 0x3C - GB(_m[ti->tile].m1, 0, 7));

    81

}

    82

    83

typedef void TownDrawTileProc(const TileInfo *ti);

    84

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    85

	TownDrawHouseLift

    86

};

    87

    88

    89

static void DrawTile_Town(TileInfo *ti)

    90

{

    91

	const DrawTownTileStruct *dcts;

    92

	byte z;

    93

	uint32 image;

    94

    95

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

    96

	{

    97

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

    98

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

    99

		byte stage = GB(_m[ti->tile].m3, 6, 2);

   100

		uint variant;

   101

		variant  = ti->x >> 4;

   102

		variant ^= ti->x >> 6;

   103

		variant ^= ti->y >> 4;

   104

		variant -= ti->y >> 6;

   105

		variant &= 3;

   106

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

   107

	}

   108

   109

	z = ti->z;

   110

   111

	/* Add bricks below the house? */

   112

	if (ti->tileh) {

   113

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

   114

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

   115

		z += 8;

   116

	} else {

   117

		/* Else draw regular ground */

   118

		DrawGroundSprite(dcts->sprite_1);

   119

	}

   120

   121

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

   122

	image = dcts->sprite_2;

   123

	if (image != 0) {

   124

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   125

   126

		AddSortableSpriteToDraw(image,

   127

			ti->x + dcts->subtile_x,

   128

			ti->y + dcts->subtile_y,

   129

			dcts->width + 1,

   130

			dcts->height + 1,

   131

			dcts->dz,

   132

			z);

   133

   134

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   135

	}

   136

   137

	{

   138

		int proc = dcts->proc - 1;

   139

   140

		if (proc >= 0) _town_draw_tile_procs[proc](ti);

   141

	}

   142

}

   143

   144

static uint GetSlopeZ_Town(const TileInfo* ti)

   145

{

   146

	return ti->z + (ti->tileh == 0 ? 0 : 8);

   147

}

   148

   149

static uint GetSlopeTileh_Town(const TileInfo *ti)

   150

{

   151

	return 0;

   152

}

   153

   154

static void AnimateTile_Town(TileIndex tile)

   155

{

   156

	int old;

   157

	int a,b;

   158

   159

	if (_tick_counter & 3) return;

   160

   161

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

   162

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

   163

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

   164

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

   165

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

   166

		DeleteAnimatedTile(tile);

   167

		return;

   168

	}

   169

   170

	if (!((old = _m[tile].m1) & 0x80)) {

   171

		int i;

   172

   173

		_m[tile].m1 |= 0x80;

   174

   175

		/** Building has 6 floors, number 0 .. 6, where 1 is illegal.

   176

		 *  This is due to the fact that the first floor is, in the graphics,

   177

		 *  the height of 2 'normal' floors.

   178

		 *  Furthermore, there are 6 lift positions from floor N (incl) to floor N + 1 (excl) */

   179

		do {

   180

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

   181

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

   182

   183

		SB(_m[tile].m5, 0, 6, i);

   184

	}

   185

   186

	a = GB(_m[tile].m1, 0, 7);

   187

	b = GB(_m[tile].m5, 0, 6) * 6;

   188

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

   189

	SB(_m[tile].m1, 0, 7, a);

   190

   191

	if (a == b) {

   192

		_m[tile].m1 &= 0x7F;

   193

		_m[tile].m5 &= 0x40;

   194

		DeleteAnimatedTile(tile);

   195

	}

   196

   197

	MarkTileDirtyByTile(tile);

   198

}

   199

   200

static void UpdateTownRadius(Town *t);

   201

   202

static bool IsCloseToTown(TileIndex tile, uint dist)

   203

{

   204

	const Town* t;

   205

   206

	FOR_ALL_TOWNS(t) {

   207

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

   208

	}

   209

	return false;

   210

}

   211

   212

static void MarkTownSignDirty(Town *t)

   213

{

   214

	MarkAllViewportsDirty(

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		t->sign.left-6,

   216

		t->sign.top-3,

   217

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

   218

		t->sign.top + 45

   219

	);

   220

}

   221

   222

void UpdateTownVirtCoord(Town *t)

   223

{

   224

	Point pt;

   225

   226

	MarkTownSignDirty(t);

   227

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

   228

	SetDParam(0, t->index);

   229

	SetDParam(1, t->population);

   230

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

   231

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   232

	MarkTownSignDirty(t);

   233

}

   234

   235

static void ChangePopulation(Town *t, int mod)

   236

{

   237

	t->population += mod;

   238

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   239

	UpdateTownVirtCoord(t);

   240

   241

	if (_town_sort_order & 2) _town_sort_dirty = true;

   242

}

   243

   244

uint32 GetWorldPopulation(void)

   245

{

   246

	uint32 pop;

   247

	const Town* t;

   248

   249

	pop = 0;

   250

	FOR_ALL_TOWNS(t) pop += t->population;

   251

	return pop;

   252

}

   253

   254

static void MakeSingleHouseBigger(TileIndex tile)

   255

{

   256

	assert(IsTileType(tile, MP_HOUSE));

   257

   258

	if (_m[tile].m5 & 0x80) return;

   259

   260

	AB(_m[tile].m5, 0, 3, 1);

   261

	if (GB(_m[tile].m5, 0, 3) != 0) return;

   262

   263

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

   264

   265

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

   266

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

   267

	}

   268

	MarkTileDirtyByTile(tile);

   269

}

   270

   271

static void MakeTownHouseBigger(TileIndex tile)

   272

{

   273

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

   274

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

   275

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

   276

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

   277

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

   278

}

   279

   280

static void TileLoop_Town(TileIndex tile)

   281

{

   282

	int house;

   283

	Town *t;

   284

	uint32 r;

   285

   286

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

   287

		MakeTownHouseBigger(tile);

   288

		return;

   289

	}

   290

   291

	house = _m[tile].m4;

   292

	if (_housetype_extra_flags[house] & 0x20 &&

   293

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

   294

			CHANCE16(1, 2) &&

   295

			AddAnimatedTile(tile)) {

   296

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

   297

	}

   298

   299

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

   300

   301

	r = Random();

   302

   303

	if (GB(r, 0, 8) < _housetype_population[house]) {

   304

		uint amt = GB(r, 0, 8) / 8 + 1;

   305

		uint moved;

   306

   307

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

   308

		t->new_max_pass += amt;

   309

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

   310

		t->new_act_pass += moved;

   311

	}

   312

   313

	if (GB(r, 8, 8) < _housetype_mailamount[house] ) {

   314

		uint amt = GB(r, 8, 8) / 8 + 1;

   315

		uint moved;

   316

   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

		t->time_until_rebuild = GB(r, 16, 6) + 130;

   325

   326

		_current_player = OWNER_TOWN;

   327

   328

		ClearTownHouse(t, tile);

   329

   330

		// rebuild with another house?

   331

		if (GB(r, 24, 8) >= 12) DoBuildTownHouse(t, tile);

   332

   333

		_current_player = OWNER_NONE;

   334

	}

   335

}

   336

   337

static void ClickTile_Town(TileIndex tile)

   338

{

   339

	/* not used */

   340

}

   341

   342

static int32 ClearTile_Town(TileIndex tile, byte flags)

   343

{

   344

	int house, rating;

   345

	int32 cost;

   346

	Town *t;

   347

   348

	// safety checks

   349

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   350

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

   351

   352

	house = _m[tile].m4;

   353

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

   354

   355

	rating = _housetype_remove_ratingmod[house];

   356

	_cleared_town_rating += rating;

   357

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

   358

   359

	if (_current_player < MAX_PLAYERS) {

   360

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

   361

			SetDParam(0, t->index);

   362

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   363

		}

   364

	}

   365

   366

	if (flags & DC_EXEC) {

   367

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   368

		ClearTownHouse(t, tile);

   369

	}

   370

   371

	return cost;

   372

}

   373

   374

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   375

{

   376

	byte type = _m[tile].m4;

   377

   378

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   379

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   380

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   381

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   382

}

   383

   384

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   385

{

   386

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

   387

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

   388

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

   389

		td->str = STR_2058_UNDER_CONSTRUCTION;

   390

	}

   391

   392

	td->owner = OWNER_TOWN;

   393

}

   394

   395

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   396

{

   397

	/* not used */

   398

	return 0;

   399

}

   400

   401

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

   402

{

   403

	/* not used */

   404

}

   405

   406

   407

static const TileIndexDiffC _roadblock_tileadd[] = {

   408

	{ 0, -1},

   409

	{ 1,  0},

   410

	{ 0,  1},

   411

	{-1,  0},

   412

   413

	// Store the first 3 elements again.

   414

	// Lets us rotate without using &3.

   415

	{ 0, -1},

   416

	{ 1,  0},

   417

	{ 0,  1}

   418

};

   419

   420

   421

static bool GrowTown(Town *t);

   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) return;

   443

   444

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

   445

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

   446

	for (_cur_town_iter += GetTownPoolSize();

   447

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   448

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   449

		uint32 i = _cur_town_ctr;

   450

		Town *t;

   451

   452

		if (++_cur_town_ctr >= GetTownPoolSize())

   453

			_cur_town_ctr = 0;

   454

   455

		t = GetTown(i);

   456

   457

		if (t->xy != 0) TownTickHandler(t);

   458

	}

   459

}

   460

   461

static byte GetTownRoadMask(TileIndex tile)

   462

{

   463

	byte b = GetRoadBitsByTile(tile);

   464

	byte r = 0;

   465

   466

	if (b & 0x01) r |= 10;

   467

	if (b & 0x02) r |=  5;

   468

	if (b & 0x04) r |=  9;

   469

	if (b & 0x08) r |=  6;

   470

	if (b & 0x10) r |=  3;

   471

	if (b & 0x20) r |= 12;

   472

	return r;

   473

}

   474

   475

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   476

{

   477

	uint k;

   478

	uint slope;

   479

   480

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

   481

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

   482

	TILE_ASSERT(tile);

   483

   484

	for (;;) {

   485

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

   486

		if (GetRoadBitsByTile(tile) == 0) {

   487

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

   488

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

   489

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

   490

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

   491

					CmdFailed(DoCommandByTile(tile, 0, 0, DC_AUTO, CMD_LANDSCAPE_CLEAR)))

   492

				return false;

   493

		}

   494

   495

		slope = GetTileSlope(tile, NULL);

   496

		if (slope == 0) {

   497

no_slope:

   498

			// Tile has no slope

   499

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