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 "network.h"

    24

#include "variables.h"

    25

    26

enum {

    27

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

    28

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

    29

	TOWN_POOL_MAX_BLOCKS      = 8000,

    30

};

    31

    32

/**

    33

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

    34

 */

    35

static void TownPoolNewBlock(uint start_item)

    36

{

    37

	Town *t;

    38

    39

	FOR_ALL_TOWNS_FROM(t, start_item)

    40

		t->index = start_item++;

    41

}

    42

    43

/* Initialize the town-pool */

    44

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

    45

    46

    47

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

    48

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

    49

 * are then scaled based on that. */

    50

#define TOWN_GROWTH_FREQUENCY 23

    51

    52

enum {

    53

	TOWN_HAS_CHURCH     = 0x02,

    54

	TOWN_HAS_STADIUM    = 0x04

    55

};

    56

    57

// Local

    58

static int _grow_town_result;

    59

    60

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

    61

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

    62

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

    63

    64

typedef struct DrawTownTileStruct {

    65

	SpriteID sprite_1;

    66

	SpriteID sprite_2;

    67

    68

	byte subtile_x:4;

    69

	byte subtile_y:4;

    70

	byte width:4;

    71

	byte height:4;

    72

	byte dz;

    73

	byte proc;

    74

} DrawTownTileStruct;

    75

    76

#include "table/town_land.h"

    77

    78

    79

static void TownDrawHouseLift(const TileInfo *ti)

    80

{

    81

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

    82

}

    83

    84

typedef void TownDrawTileProc(const TileInfo *ti);

    85

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    86

	TownDrawHouseLift

    87

};

    88

    89

    90

static void DrawTile_Town(TileInfo *ti)

    91

{

    92

	const DrawTownTileStruct *dcts;

    93

	byte z;

    94

	uint32 image;

    95

    96

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

    97

	{

    98

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

    99

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

   100

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

   101

		uint variant;

   102

		variant  = ti->x >> 4;

   103

		variant ^= ti->x >> 6;

   104

		variant ^= ti->y >> 4;

   105

		variant -= ti->y >> 6;

   106

		variant &= 3;

   107

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

   108

	}

   109

   110

	z = ti->z;

   111

   112

	/* Add bricks below the house? */

   113

	if (ti->tileh) {

   114

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

   115

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

   116

		z += 8;

   117

	} else {

   118

		/* Else draw regular ground */

   119

		DrawGroundSprite(dcts->sprite_1);

   120

	}

   121

   122

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

   123

	image = dcts->sprite_2;

   124

	if (image != 0) {

   125

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   126

   127

		AddSortableSpriteToDraw(image,

   128

			ti->x + dcts->subtile_x,

   129

			ti->y + dcts->subtile_y,

   130

			dcts->width + 1,

   131

			dcts->height + 1,

   132

			dcts->dz,

   133

			z);

   134

   135

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   136

	}

   137

   138

	{

   139

		int proc = dcts->proc - 1;

   140

   141

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

   142

	}

   143

}

   144

   145

static uint GetSlopeZ_Town(const TileInfo* ti)

   146

{

   147

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

   148

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

   149

	return (uint16) z;

   150

}

   151

   152

static uint GetSlopeTileh_Town(const TileInfo *ti)

   153

{

   154

	return ti->tileh;

   155

}

   156

   157

static void AnimateTile_Town(TileIndex tile)

   158

{

   159

	int old;

   160

	int a,b;

   161

   162

	if (_tick_counter & 3) return;

   163

   164

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

   165

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

   166

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

   167

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

   168

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

   169

		DeleteAnimatedTile(tile);

   170

		return;

   171

	}

   172

   173

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

   174

		int i;

   175

   176

		_m[tile].m1 |= 0x80;

   177

   178

		do {

   179

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

   180

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

   181

   182

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

   183

	}

   184

   185

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

   186

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

   187

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

   188

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

   189

   190

	if (a == b) {

   191

		_m[tile].m1 &= 0x7F;

   192

		_m[tile].m5 &= 0x40;

   193

		DeleteAnimatedTile(tile);

   194

	}

   195

   196

	MarkTileDirtyByTile(tile);

   197

}

   198

   199

static void UpdateTownRadius(Town *t);

   200

   201

static bool IsCloseToTown(TileIndex tile, uint dist)

   202

{

   203

	const Town* t;

   204

   205

	FOR_ALL_TOWNS(t) {

   206

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

   207

	}

   208

	return false;

   209

}

   210

   211

static void MarkTownSignDirty(Town *t)

   212

{

   213

	MarkAllViewportsDirty(

   214

		t->sign.left-6,

   215

		t->sign.top-3,

   216

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

   217

		t->sign.top + 45

   218

	);

   219

}

   220

   221

void UpdateTownVirtCoord(Town *t)

   222

{

   223

	Point pt;

   224

   225

	MarkTownSignDirty(t);

   226

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

   227

	SetDParam(0, t->index);

   228

	SetDParam(1, t->population);

   229

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

   230

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   231

	MarkTownSignDirty(t);

   232

}

   233

   234

static void ChangePopulation(Town *t, int mod)

   235

{

   236

	t->population += mod;

   237

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   238

	UpdateTownVirtCoord(t);

   239

   240

	if (_town_sort_order & 2) _town_sort_dirty = true;

   241

}

   242

   243

uint32 GetWorldPopulation(void)

   244

{

   245

	uint32 pop;

   246

	const Town* t;

   247

   248

	pop = 0;

   249

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

   250

	return pop;

   251

}

   252

   253

static void MakeSingleHouseBigger(TileIndex tile)

   254

{

   255

	assert(IsTileType(tile, MP_HOUSE));

   256

   257

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

   258

   259

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

   260

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

   261

   262

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

   263

   264

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

   265

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

   266

	}

   267

	MarkTileDirtyByTile(tile);

   268

}

   269

   270

static void MakeTownHouseBigger(TileIndex tile)

   271

{

   272

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

   273

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

   274

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

   275

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

   276

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

   277

}

   278

   279

static void TileLoop_Town(TileIndex tile)

   280

{

   281

	int house;

   282

	Town *t;

   283

	uint32 r;

   284

   285

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

   286

		MakeTownHouseBigger(tile);

   287

		return;

   288

	}

   289

   290

	house = _m[tile].m4;

   291

	if (_housetype_extra_flags[house] & 0x20 &&

   292

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

   293

			CHANCE16(1, 2) &&

   294

			AddAnimatedTile(tile)) {

   295

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

   296

	}

   297

   298

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

   299

   300

	r = Random();

   301

   302

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

   303

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

   304

		uint moved;

   305

   306

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

   307

		t->new_max_pass += amt;

   308

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

   309

		t->new_act_pass += moved;

   310

	}

   311

   312

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

   313

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

   314

		uint moved;

   315

   316

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

   317

		t->new_max_mail += amt;

   318

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

   319

		t->new_act_mail += moved;

   320

	}

   321

   322

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

   323

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

   324

   325

		_current_player = OWNER_TOWN;

   326

   327

		ClearTownHouse(t, tile);

   328

   329

		// rebuild with another house?

   330

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

   331

   332

		_current_player = OWNER_NONE;

   333

	}

   334

}

   335

   336

static void ClickTile_Town(TileIndex tile)

   337

{

   338

	/* not used */

   339

}

   340

   341

static int32 ClearTile_Town(TileIndex tile, byte flags)

   342

{

   343

	int house, rating;

   344

	int32 cost;

   345

	Town *t;

   346

   347

	// safety checks

   348

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   349

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

   350

   351

	house = _m[tile].m4;

   352

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

   353

   354

	rating = _housetype_remove_ratingmod[house];

   355

	_cleared_town_rating += rating;

   356

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

   357

   358

	if (_current_player < MAX_PLAYERS) {

   359

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

   360

			SetDParam(0, t->index);

   361

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   362

		}

   363

	}

   364

   365

	if (flags & DC_EXEC) {

   366

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   367

		ClearTownHouse(t, tile);

   368

	}

   369

   370

	return cost;

   371

}

   372

   373

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   374

{

   375

	byte type = _m[tile].m4;

   376

   377

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   378

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   379

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   380

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   381

}

   382

   383

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   384

{

   385

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

   386

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

   387

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

   388

		td->str = STR_2058_UNDER_CONSTRUCTION;

   389

	}

   390

   391

	td->owner = OWNER_TOWN;

   392

}

   393

   394

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   395

{

   396

	/* not used */

   397

	return 0;

   398

}

   399

   400

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

   401

{

   402

	/* not used */

   403

}

   404

   405

   406

static const TileIndexDiffC _roadblock_tileadd[] = {

   407

	{ 0, -1},

   408

	{ 1,  0},

   409

	{ 0,  1},

   410

	{-1,  0},

   411

   412

	// Store the first 3 elements again.

   413

	// Lets us rotate without using &3.

   414

	{ 0, -1},

   415

	{ 1,  0},

   416

	{ 0,  1}

   417

};

   418

   419

static void TownTickHandler(Town *t)

   420

{

   421

	if (t->flags12&1) {

   422

		int i = t->grow_counter - 1;

   423

		if (i < 0) {

   424

			if (GrowTown(t)) {

   425

				i = t->growth_rate;

   426

			} else {

   427

				i = 0;

   428

			}

   429

		}

   430

		t->grow_counter = i;

   431

	}

   432

   433

	UpdateTownRadius(t);

   434

}

   435

   436

void OnTick_Town(void)

   437

{

   438

	if (_game_mode == GM_EDITOR) return;

   439

   440

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

   441

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

   442

	for (_cur_town_iter += GetTownPoolSize();

   443

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   444

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   445

		uint32 i = _cur_town_ctr;

   446

		Town *t;

   447

   448

		if (++_cur_town_ctr >= GetTownPoolSize())

   449

			_cur_town_ctr = 0;

   450

   451

		t = GetTown(i);

   452

   453

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

   454

	}

   455

}

   456

   457

static byte GetTownRoadMask(TileIndex tile)

   458

{

   459

	byte b = GetRoadBitsByTile(tile);

   460

	byte r = 0;

   461

   462

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

   463

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

   464

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

   465

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

   466

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

   467

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

   468

	return r;

   469

}

   470

   471

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   472

{

   473

	uint k;

   474

	uint slope;

   475

   476

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

   477

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

   478

	TILE_ASSERT(tile);

   479

   480

	for (;;) {

   481

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

   482

		if (GetRoadBitsByTile(tile) == 0) {

   483

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

   484

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

   485

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

   486

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

   487

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

   488

				return false;

   489

		}

   490

   491

		slope = GetTileSlope(tile, NULL);

   492

		if (slope == 0) {

   493

no_slope:

   494

			// Tile has no slope

   495

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

   496

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

   497

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

   498

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

   499

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