1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "functions.h"

     6

#include "strings.h"

     7

#include "road_map.h"

     8

#include "table/strings.h"

     9

#include "table/sprites.h"

    10

#include "map.h"

    11

#include "tile.h"

    12

#include "town_map.h"

    13

#include "tunnel_map.h"

    14

#include "viewport.h"

    15

#include "town.h"

    16

#include "command.h"

    17

#include "gfx.h"

    18

#include "industry.h"

    19

#include "station.h"

    20

#include "player.h"

    21

#include "news.h"

    22

#include "saveload.h"

    23

#include "economy.h"

    24

#include "gui.h"

    25

#include "unmovable_map.h"

    26

#include "variables.h"

    27

#include "bridge.h"

    28

    29

enum {

    30

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

    31

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

    32

	TOWN_POOL_MAX_BLOCKS      = 8000,

    33

};

    34

    35

/**

    36

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

    37

 */

    38

static void TownPoolNewBlock(uint start_item)

    39

{

    40

	Town *t;

    41

    42

	FOR_ALL_TOWNS_FROM(t, start_item)

    43

		t->index = start_item++;

    44

}

    45

    46

/* Initialize the town-pool */

    47

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

    48

    49

    50

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

    51

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

    52

 * are then scaled based on that. */

    53

#define TOWN_GROWTH_FREQUENCY 23

    54

    55

enum {

    56

	TOWN_HAS_CHURCH     = 0x02,

    57

	TOWN_HAS_STADIUM    = 0x04

    58

};

    59

    60

// Local

    61

static int _grow_town_result;

    62

    63

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

    64

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

    65

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

    66

    67

typedef struct DrawTownTileStruct {

    68

	SpriteID sprite_1;

    69

	SpriteID sprite_2;

    70

    71

	byte subtile_x:4;

    72

	byte subtile_y:4;

    73

	byte width:4;

    74

	byte height:4;

    75

	byte dz;

    76

	byte proc;

    77

} DrawTownTileStruct;

    78

    79

#include "table/town_land.h"

    80

    81

    82

static void TownDrawHouseLift(const TileInfo *ti)

    83

{

    84

	AddChildSpriteScreen(SPR_LIFT, 14, 60 - GB(_m[ti->tile].m1, 0, 7));

    85

}

    86

    87

typedef void TownDrawTileProc(const TileInfo *ti);

    88

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    89

	TownDrawHouseLift

    90

};

    91

    92

    93

static void DrawTile_Town(TileInfo *ti)

    94

{

    95

	const DrawTownTileStruct *dcts;

    96

	byte z;

    97

	uint32 image;

    98

    99

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

   100

	{

   101

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

   102

		byte gfx   = GetHouseType(ti->tile);

   103

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

   104

		uint variant;

   105

		variant  = ti->x >> 4;

   106

		variant ^= ti->x >> 6;

   107

		variant ^= ti->y >> 4;

   108

		variant -= ti->y >> 6;

   109

		variant &= 3;

   110

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

   111

	}

   112

   113

	z = ti->z;

   114

   115

	/* Add bricks below the house? */

   116

	if (ti->tileh) {

   117

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

   118

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

   119

		z += 8;

   120

	} else {

   121

		/* Else draw regular ground */

   122

		DrawGroundSprite(dcts->sprite_1);

   123

	}

   124

   125

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

   126

	image = dcts->sprite_2;

   127

	if (image != 0) {

   128

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   129

   130

		AddSortableSpriteToDraw(image,

   131

			ti->x + dcts->subtile_x,

   132

			ti->y + dcts->subtile_y,

   133

			dcts->width + 1,

   134

			dcts->height + 1,

   135

			dcts->dz,

   136

			z);

   137

   138

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   139

	}

   140

   141

	{

   142

		int proc = dcts->proc - 1;

   143

   144

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

   145

	}

   146

}

   147

   148

static uint GetSlopeZ_Town(const TileInfo* ti)

   149

{

   150

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

   151

}

   152

   153

static uint GetSlopeTileh_Town(const TileInfo *ti)

   154

{

   155

	return 0;

   156

}

   157

   158

static void AnimateTile_Town(TileIndex tile)

   159

{

   160

	int old;

   161

	int a,b;

   162

   163

	if (_tick_counter & 3) return;

   164

   165

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

   166

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

   167

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

   168

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

   169

	if (!(_housetype_extra_flags[GetHouseType(tile)] & 0x20)) {

   170

		DeleteAnimatedTile(tile);

   171

		return;

   172

	}

   173

   174

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

   175

		int i;

   176

   177

		_m[tile].m1 |= 0x80;

   178

   179

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

   180

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

   181

		 *  the height of 2 'normal' floors.

   182

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

   183

		do {

   184

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

   185

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

   186

   187

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

   188

	}

   189

   190

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

   191

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

   192

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

   193

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

   194

   195

	if (a == b) {

   196

		_m[tile].m1 &= 0x7F;

   197

		_m[tile].m5 &= 0x40;

   198

		DeleteAnimatedTile(tile);

   199

	}

   200

   201

	MarkTileDirtyByTile(tile);

   202

}

   203

   204

static void UpdateTownRadius(Town *t);

   205

   206

static bool IsCloseToTown(TileIndex tile, uint dist)

   207

{

   208

	const Town* t;

   209

   210

	FOR_ALL_TOWNS(t) {

   211

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

   212

	}

   213

	return false;

   214

}

   215

   216

static void MarkTownSignDirty(Town *t)

   217

{

   218

	MarkAllViewportsDirty(

   219

		t->sign.left-6,

   220

		t->sign.top-3,

   221

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

   222

		t->sign.top + 45

   223

	);

   224

}

   225

   226

void UpdateTownVirtCoord(Town *t)

   227

{

   228

	Point pt;

   229

   230

	MarkTownSignDirty(t);

   231

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

   232

	SetDParam(0, t->index);

   233

	SetDParam(1, t->population);

   234

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

   235

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   236

	MarkTownSignDirty(t);

   237

}

   238

   239

static void ChangePopulation(Town *t, int mod)

   240

{

   241

	t->population += mod;

   242

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   243

	UpdateTownVirtCoord(t);

   244

   245

	if (_town_sort_order & 2) _town_sort_dirty = true;

   246

}

   247

   248

uint32 GetWorldPopulation(void)

   249

{

   250

	uint32 pop;

   251

	const Town* t;

   252

   253

	pop = 0;

   254

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

   255

	return pop;

   256

}

   257

   258

static void MakeSingleHouseBigger(TileIndex tile)

   259

{

   260

	assert(IsTileType(tile, MP_HOUSE));

   261

   262

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

   263

   264

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

   265

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

   266

   267

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

   268

   269

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

   270

		ChangePopulation(GetTownByTile(tile), _housetype_population[GetHouseType(tile)]);

   271

	}

   272

	MarkTileDirtyByTile(tile);

   273

}

   274

   275

static void MakeTownHouseBigger(TileIndex tile)

   276

{

   277

	uint flags = _house_more_flags[GetHouseType(tile)];

   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 = GetHouseType(tile);

   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 = GetTownByTile(tile);

   304

   305

	r = Random();

   306

   307

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

   308

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

   309

		uint moved;

   310

   311

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

   312

		t->new_max_pass += amt;

   313

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

   314

		t->new_act_pass += moved;

   315

	}

   316

   317

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

   318

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

   319

		uint moved;

   320

   321

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

   322

		t->new_max_mail += amt;

   323

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

   324

		t->new_act_mail += moved;

   325

	}

   326

   327

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

   328

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

   329

   330

		_current_player = OWNER_TOWN;

   331

   332

		ClearTownHouse(t, tile);

   333

   334

		// rebuild with another house?

   335

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

   336

   337

		_current_player = OWNER_NONE;

   338

	}

   339

}

   340

   341

static void ClickTile_Town(TileIndex tile)

   342

{

   343

	/* not used */

   344

}

   345

   346

static int32 ClearTile_Town(TileIndex tile, byte flags)

   347

{

   348

	int house, rating;

   349

	int32 cost;

   350

	Town *t;

   351

   352

	// safety checks

   353

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   354

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

   355

   356

	house = GetHouseType(tile);

   357

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

   358

   359

	rating = _housetype_remove_ratingmod[house];

   360

	_cleared_town_rating += rating;

   361

	_cleared_town = t = GetTownByTile(tile);

   362

   363

	if (_current_player < MAX_PLAYERS) {

   364

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

   365

			SetDParam(0, t->index);

   366

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   367

		}

   368

	}

   369

   370

	if (flags & DC_EXEC) {

   371

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   372

		ClearTownHouse(t, tile);

   373

	}

   374

   375

	return cost;

   376

}

   377

   378

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   379

{

   380

	byte type = GetHouseType(tile);

   381

   382

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   383

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   384

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   385

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   386

}

   387

   388

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   389

{

   390

	td->str = _town_tile_names[GetHouseType(tile)];

   391

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

   392

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

   393

		td->str = STR_2058_UNDER_CONSTRUCTION;

   394

	}

   395

   396

	td->owner = OWNER_TOWN;

   397

}

   398

   399

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   400

{

   401

	/* not used */

   402

	return 0;

   403

}

   404

   405

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

   406

{

   407

	/* not used */

   408

}

   409

   410

   411

static const TileIndexDiffC _roadblock_tileadd[] = {

   412

	{ 0, -1},

   413

	{ 1,  0},

   414

	{ 0,  1},

   415

	{-1,  0},

   416

   417

	// Store the first 3 elements again.

   418

	// Lets us rotate without using &3.

   419

	{ 0, -1},

   420

	{ 1,  0},

   421

	{ 0,  1}

   422

};

   423

   424

   425

static bool GrowTown(Town *t);

   426

   427

static void TownTickHandler(Town *t)

   428

{

   429

	if (t->flags12&1) {

   430

		int i = t->grow_counter - 1;

   431

		if (i < 0) {

   432

			if (GrowTown(t)) {

   433

				i = t->growth_rate;

   434

			} else {

   435

				i = 0;

   436

			}

   437

		}

   438

		t->grow_counter = i;

   439

	}

   440

   441

	UpdateTownRadius(t);

   442

}

   443

   444

void OnTick_Town(void)

   445

{

   446

	if (_game_mode == GM_EDITOR) return;

   447

   448

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

   449

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

   450

	for (_cur_town_iter += GetTownPoolSize();

   451

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   452

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   453

		uint32 i = _cur_town_ctr;

   454

		Town *t;

   455

   456

		if (++_cur_town_ctr >= GetTownPoolSize())

   457

			_cur_town_ctr = 0;

   458

   459

		t = GetTown(i);

   460

   461

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

   462

	}

   463

}

   464

   465

static RoadBits GetTownRoadMask(TileIndex tile)

   466

{

   467

	TrackBits b = GetAnyRoadTrackBits(tile);

   468

	RoadBits r = 0;

   469

   470

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   471

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   472

	if (b & TRACK_BIT_UPPER) r |= ROAD_NE | ROAD_NW;

   473

	if (b & TRACK_BIT_LOWER) r |= ROAD_SE | ROAD_SW;

   474

	if (b & TRACK_BIT_LEFT)  r |= ROAD_NW | ROAD_SW;

   475

	if (b & TRACK_BIT_RIGHT) r |= ROAD_NE | ROAD_SE;

   476

	return r;

   477

}

   478

   479

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   480

{

   481

	uint k;

   482

	uint slope;

   483

   484

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

   485

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

   486

	TILE_ASSERT(tile);

   487

   488

	for (;;) {

   489

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

   490

		if (GetAnyRoadTrackBits(tile) == 0) {

   491

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

   492

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

   493

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

   494

			if (CmdFailed(DoCommandByTile(tile, (dir & 1 ? ROAD_X : ROAD_Y), 0, DC_AUTO, CMD_BUILD_ROAD)) &&

   495

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

   496

				return false;

   497

		}

   498