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(TileInfo *ti)

    80

{

    81

	AddChildSpriteScreen(0x5A3, 0xE, 0x3C - (_m[ti->tile].m1 & 0x7F));

    82

}

    83

    84

typedef void TownDrawTileProc(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 = _m[ti->tile].m3 >> 6;

   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(0x3DD + 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

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

   124

		if (_display_opt & DO_TRANS_BUILDINGS)

   125

			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)

   136

			return;

   137

	}

   138

   139

	{

   140

		int proc;

   141

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

   142

			_town_draw_tile_procs[proc](ti);

   143

	}

   144

}

   145

   146

static uint GetSlopeZ_Town(TileInfo *ti)

   147

{

   148

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

   149

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

   150

	return (uint16) z;

   151

}

   152

   153

static uint GetSlopeTileh_Town(TileInfo *ti)

   154

{

   155

	return ti->tileh;

   156

}

   157

   158

static void AnimateTile_Town(TileIndex tile)

   159

{

   160

	int old;

   161

	int i;

   162

	int a,b;

   163

   164

	if (_tick_counter & 3)

   165

		return;

   166

   167

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

   168

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

   169

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

   170

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

   171

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

   172

		DeleteAnimatedTile(tile);

   173

		return;

   174

	}

   175

   176

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

   177

		_m[tile].m1 |= 0x80;

   178

   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 = _m[tile].m1 & 0x7F;

   187

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

   188

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

   189

	_m[tile].m1 = (_m[tile].m1 & 0x80) | 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

	Town *t;

   205

   206

	FOR_ALL_TOWNS(t) {

   207

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

   208

			return true;

   209

	}

   210

	return false;

   211

}

   212

   213

static void MarkTownSignDirty(Town *t)

   214

{

   215

	MarkAllViewportsDirty(

   216

		t->sign.left-6,

   217

		t->sign.top-3,

   218

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

   219

		t->sign.top + 45

   220

	);

   221

}

   222

   223

void UpdateTownVirtCoord(Town *t)

   224

{

   225

	Point pt;

   226

   227

	MarkTownSignDirty(t);

   228

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

   229

	SetDParam(0, t->index);

   230

	SetDParam(1, t->population);

   231

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

   232

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   233

	MarkTownSignDirty(t);

   234

}

   235

   236

static void ChangePopulation(Town *t, int mod)

   237

{

   238

	t->population += mod;

   239

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   240

	UpdateTownVirtCoord(t);

   241

   242

	if (_town_sort_order & 2) _town_sort_dirty = true;

   243

}

   244

   245

uint32 GetWorldPopulation(void)

   246

{

   247

	uint32 pop;

   248

	Town *t;

   249

	pop = 0;

   250

	FOR_ALL_TOWNS(t) {

   251

			pop += t->population;

   252

	}

   253

	return pop;

   254

}

   255

   256

static void MakeSingleHouseBigger(TileIndex tile)

   257

{

   258

	assert(IsTileType(tile, MP_HOUSE));

   259

   260

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

   261

   262

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

   263

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

   264

   265

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

   266

   267

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

   268

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

   269

	}

   270

	MarkTileDirtyByTile(tile);

   271

}

   272

   273

static void MakeTownHouseBigger(TileIndex tile)

   274

{

   275

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

   276

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

   277

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

   278

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

   279

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

   280

}

   281

   282

static void TileLoop_Town(TileIndex tile)

   283

{

   284

	int house;

   285

	Town *t;

   286

	uint32 r;

   287

   288

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

   289

		MakeTownHouseBigger(tile);

   290

		return;

   291

	}

   292

   293

	house = _m[tile].m4;

   294

	if (_housetype_extra_flags[house] & 0x20 &&

   295

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

   296

			CHANCE16(1,2) &&

   297

			AddAnimatedTile(tile)) {

   298

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

   299

	}

   300

   301

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

   302

   303

	r = Random();

   304

   305

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

   306

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

   307

		uint moved;

   308

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

   316

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

   317

		uint moved;

   318

   319

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

   320

		t->new_max_mail += amt;

   321

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

   322

		t->new_act_mail += moved;

   323

	}

   324

   325

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

   326

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

   327

   328

		_current_player = OWNER_TOWN;

   329

   330

		ClearTownHouse(t, tile);

   331

   332

		// rebuild with another house?

   333

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

   334

   335

		_current_player = OWNER_NONE;

   336

	}

   337

}

   338

   339

static void ClickTile_Town(TileIndex tile)

   340

{

   341

	/* not used */

   342

}

   343

   344

static int32 ClearTile_Town(TileIndex tile, byte flags)

   345

{

   346

	int house, rating;

   347

	int32 cost;

   348

	Town *t;

   349

   350

	// safety checks

   351

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   352

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

   353

   354

	house = _m[tile].m4;

   355

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

   356

   357

	rating = _housetype_remove_ratingmod[house];

   358

	_cleared_town_rating += rating;

   359

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

   360

   361

	if (_current_player < MAX_PLAYERS) {

   362

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

   363

			SetDParam(0, t->index);

   364

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   365

		}

   366

	}

   367

   368

	if (flags & DC_EXEC) {

   369

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   370

		ClearTownHouse(t, tile);

   371

	}

   372

   373

	return cost;

   374

}

   375

   376

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   377

{

   378

	int type = _m[tile].m4;

   379

   380

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   381

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   382

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   383

	ac[CT_FOOD] = _housetype_cargo_food[type];

   384

}

   385

   386

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   387

{

   388

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

   389

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

   390

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

   391

		td->str = STR_2058_UNDER_CONSTRUCTION;

   392

	}

   393

   394

	td->owner = OWNER_TOWN;

   395

}

   396

   397

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   398

{

   399

	/* not used */

   400

	return 0;

   401

}

   402

   403

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

   404

{

   405

	/* not used */

   406

}

   407

   408

   409

static const TileIndexDiffC _roadblock_tileadd[] = {

   410

	{ 0, -1},

   411

	{ 1,  0},

   412

	{ 0,  1},

   413

	{-1,  0},

   414

   415

	// Store the first 3 elements again.

   416

	// Lets us rotate without using &3.

   417

	{ 0, -1},

   418

	{ 1,  0},

   419

	{ 0,  1}

   420

};

   421

   422

static void TownTickHandler(Town *t)

   423

{

   424

	if (t->flags12&1) {

   425

		int i = t->grow_counter - 1;

   426

		if (i < 0) {

   427

			if (GrowTown(t)) {

   428

				i = t->growth_rate;

   429

			} else {

   430

				i = 0;

   431

			}

   432

		}

   433

		t->grow_counter = i;

   434

	}

   435

   436

	UpdateTownRadius(t);

   437

}

   438

   439

void OnTick_Town(void)

   440

{

   441

	if (_game_mode == GM_EDITOR)

   442

		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)

   458

			TownTickHandler(t);

   459

	}

   460

}

   461

   462

static byte GetTownRoadMask(TileIndex tile)

   463

{

   464

	byte b = GetRoadBitsByTile(tile);

   465

	byte r=0;

   466

	if (b&1) r|=10;

   467

	if (b&2) r|=5;

   468

	if (b&4) r|=9;

   469

	if (b&8) r|=6;

   470

	if (b&16) r|=3;

   471

	if (b&32) 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 (DoCommandByTile(tile, (dir&1)?0xA:0x5, 0, DC_AUTO, CMD_BUILD_ROAD) == CMD_ERROR &&

   491

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

   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.

   500

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

   501

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

   502

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

   503

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