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 {

    64

	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

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

   147

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

   148

	return (uint16) z;

   149

}

   150

   151

static uint GetSlopeTileh_Town(const TileInfo *ti)

   152

{

   153

	return ti->tileh;

   154

}

   155

   156

static void AnimateTile_Town(TileIndex tile)

   157

{

   158

	int old;

   159

	int a,b;

   160

   161

	if (_tick_counter & 3) 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].m1) & 0x80)) {

   173

		int i;

   174

   175

		_m[tile].m1 |= 0x80;

   176

   177

		do {

   178

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

   179

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

   180

   181

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

   182

	}

   183

   184

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

   185

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

   186

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

   187

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

   188

   189

	if (a == b) {

   190

		_m[tile].m1 &= 0x7F;

   191

		_m[tile].m5 &= 0x40;

   192

		DeleteAnimatedTile(tile);

   193

	}

   194

   195

	MarkTileDirtyByTile(tile);

   196

}

   197

   198

static void UpdateTownRadius(Town *t);

   199

   200

static bool IsCloseToTown(TileIndex tile, uint dist)

   201

{

   202

	const Town* t;

   203

   204

	FOR_ALL_TOWNS(t) {

   205

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

   206

	}

   207

	return false;

   208

}

   209

   210

static void MarkTownSignDirty(Town *t)

   211

{

   212

	MarkAllViewportsDirty(

   213

		t->sign.left-6,

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		t->sign.top-3,

   215

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

   216

		t->sign.top + 45

   217

	);

   218

}

   219

   220

void UpdateTownVirtCoord(Town *t)

   221

{

   222

	Point pt;

   223

   224

	MarkTownSignDirty(t);

   225

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

   226

	SetDParam(0, t->index);

   227

	SetDParam(1, t->population);

   228

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

   229

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   230

	MarkTownSignDirty(t);

   231

}

   232

   233

static void ChangePopulation(Town *t, int mod)

   234

{

   235

	t->population += mod;

   236

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   237

	UpdateTownVirtCoord(t);

   238

   239

	if (_town_sort_order & 2) _town_sort_dirty = true;

   240

}

   241

   242

uint32 GetWorldPopulation(void)

   243

{

   244

	uint32 pop;

   245

	const Town* t;

   246

   247

	pop = 0;

   248

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

   249

	return pop;

   250

}

   251

   252

static void MakeSingleHouseBigger(TileIndex tile)

   253

{

   254

	assert(IsTileType(tile, MP_HOUSE));

   255

   256

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

   257

   258

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

   259

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

   260

   261

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

   262

   263

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

   264

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

   265

	}

   266

	MarkTileDirtyByTile(tile);

   267

}

   268

   269

static void MakeTownHouseBigger(TileIndex tile)

   270

{

   271

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

   272

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

   273

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

   274

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

   275

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

   276

}

   277

   278

static void TileLoop_Town(TileIndex tile)

   279

{

   280

	int house;

   281

	Town *t;

   282

	uint32 r;

   283

   284

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

   285

		MakeTownHouseBigger(tile);

   286

		return;

   287

	}

   288

   289

	house = _m[tile].m4;

   290

	if (_housetype_extra_flags[house] & 0x20 &&

   291

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

   292

			CHANCE16(1, 2) &&

   293

			AddAnimatedTile(tile)) {

   294

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

   295

	}

   296

   297

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

   298

   299

	r = Random();

   300

   301

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

   302

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

   303

		uint moved;

   304

   305

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

   306

		t->new_max_pass += amt;

   307

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

   308

		t->new_act_pass += moved;

   309

	}

   310

   311

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

   312

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

   313

		uint moved;

   314

   315

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

   316

		t->new_max_mail += amt;

   317

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

   318

		t->new_act_mail += moved;

   319

	}

   320

   321

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

   322

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

   323

   324

		_current_player = OWNER_TOWN;

   325

   326

		ClearTownHouse(t, tile);

   327

   328

		// rebuild with another house?

   329

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

   330

   331

		_current_player = OWNER_NONE;

   332

	}

   333

}

   334

   335

static void ClickTile_Town(TileIndex tile)

   336

{

   337

	/* not used */

   338

}

   339

   340

static int32 ClearTile_Town(TileIndex tile, byte flags)

   341

{

   342

	int house, rating;

   343

	int32 cost;

   344

	Town *t;

   345

   346

	// safety checks

   347

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   348

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

   349

   350

	house = _m[tile].m4;

   351

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

   352

   353

	rating = _housetype_remove_ratingmod[house];

   354

	_cleared_town_rating += rating;

   355

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

   356

   357

	if (_current_player < MAX_PLAYERS) {

   358

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

   359

			SetDParam(0, t->index);

   360

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   361

		}

   362

	}

   363

   364

	if (flags & DC_EXEC) {

   365

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   366

		ClearTownHouse(t, tile);

   367

	}

   368

   369

	return cost;

   370

}

   371

   372

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   373

{

   374

	byte type = _m[tile].m4;

   375

   376

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   377

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   378

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   379

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   380

}

   381

   382

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   383

{

   384

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

   385

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

   386

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

   387

		td->str = STR_2058_UNDER_CONSTRUCTION;

   388

	}

   389

   390

	td->owner = OWNER_TOWN;

   391

}

   392

   393

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   394

{

   395

	/* not used */

   396

	return 0;

   397

}

   398

   399

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

   400

{

   401

	/* not used */

   402

}

   403

   404

   405

static const TileIndexDiffC _roadblock_tileadd[] = {

   406

	{ 0, -1},

   407

	{ 1,  0},

   408

	{ 0,  1},

   409

	{-1,  0},

   410

   411

	// Store the first 3 elements again.

   412

	// Lets us rotate without using &3.

   413

	{ 0, -1},

   414

	{ 1,  0},

   415

	{ 0,  1}

   416

};

   417

   418

static void TownTickHandler(Town *t)

   419

{

   420

	if (t->flags12&1) {

   421

		int i = t->grow_counter - 1;

   422

		if (i < 0) {

   423

			if (GrowTown(t)) {

   424

				i = t->growth_rate;

   425

			} else {

   426

				i = 0;

   427

			}

   428

		}

   429

		t->grow_counter = i;

   430

	}

   431

   432

	UpdateTownRadius(t);

   433

}

   434

   435

void OnTick_Town(void)

   436

{

   437

	if (_game_mode == GM_EDITOR) return;

   438

   439

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

   440

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

   441

	for (_cur_town_iter += GetTownPoolSize();

   442

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   443

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   444

		uint32 i = _cur_town_ctr;

   445

		Town *t;

   446

   447

		if (++_cur_town_ctr >= GetTownPoolSize())

   448

			_cur_town_ctr = 0;

   449

   450

		t = GetTown(i);

   451

   452

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

   453

	}

   454

}

   455

   456

static byte GetTownRoadMask(TileIndex tile)

   457

{

   458

	byte b = GetRoadBitsByTile(tile);

   459

	byte r = 0;

   460

   461

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

   462

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

   463

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

   464

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

   465

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

   466

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

   467

	return r;

   468

}

   469

   470

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   471

{

   472

	uint k;

   473

	uint slope;

   474

   475

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

   476

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

   477

	TILE_ASSERT(tile);

   478

   479

	for (;;) {

   480

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

   481

		if (GetRoadBitsByTile(tile) == 0) {

   482

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

   483

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

   484

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

   485

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

   486

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

   487

				return false;

   488

		}

   489

   490

		slope = GetTileSlope(tile, NULL);

   491

		if (slope == 0) {

   492

no_slope:

   493

			// Tile has no slope

   494

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

   495

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

   496

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

   497

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

   498

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

   499

				return false;