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 "water_map.h"

    27

#include "variables.h"

    28

#include "bridge.h"

    29

#include "bridge_map.h"

    30

#include "date.h"

    31

#include "table/town_land.h"

    32

#include "genworld.h"

    33

    34

/**

    35

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

    36

 */

    37

static void TownPoolNewBlock(uint start_item)

    38

{

    39

	Town *t;

    40

    41

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

    42

	 * TODO - This is just a temporary stage, this will be removed. */

    43

	for (t = GetTown(start_item); t != NULL; t = (t->index + 1U < GetTownPoolSize()) ? GetTown(t->index + 1U) : NULL) t->index = start_item++;

    44

}

    45

    46

/* Initialize the town-pool */

    47

DEFINE_OLD_POOL(Town, Town, TownPoolNewBlock, NULL)

    48

    49

void DestroyTown(Town *t)

    50

{

    51

	Industry *i;

    52

	TileIndex tile;

    53

    54

	/* Delete town authority window

    55

	 * and remove from list of sorted towns */

    56

	DeleteWindowById(WC_TOWN_VIEW, t->index);

    57

	_town_sort_dirty = true;

    58

	_total_towns--;

    59

    60

	/* Delete all industries belonging to the town */

    61

	FOR_ALL_INDUSTRIES(i) if (i->town == t) DeleteIndustry(i);

    62

    63

	/* Go through all tiles and delete those belonging to the town */

    64

	for (tile = 0; tile < MapSize(); ++tile) {

    65

		switch (GetTileType(tile)) {

    66

			case MP_HOUSE:

    67

				if (GetTownByTile(tile) == t) DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

    68

				break;

    69

    70

			case MP_STREET:

    71

			case MP_TUNNELBRIDGE:

    72

				if (IsTileOwner(tile, OWNER_TOWN) &&

    73

						ClosestTownFromTile(tile, (uint)-1) == t)

    74

					DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

    75

				break;

    76

    77

			default:

    78

				break;

    79

		}

    80

	}

    81

    82

	DeleteName(t->townnametype);

    83

	DeleteSubsidyWithTown(t->index);

    84

    85

	MarkWholeScreenDirty();

    86

}

    87

    88

// Local

    89

static int _grow_town_result;

    90

    91

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

    92

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

    93

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

    94

    95

static void TownDrawHouseLift(const TileInfo *ti)

    96

{

    97

	AddChildSpriteScreen(SPR_LIFT, 14, 60 - GetLiftPosition(ti->tile));

    98

}

    99

   100

typedef void TownDrawTileProc(const TileInfo *ti);

   101

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

   102

	TownDrawHouseLift

   103

};

   104

   105

   106

static void DrawTile_Town(TileInfo *ti)

   107

{

   108

	const DrawBuildingsTileStruct *dcts;

   109

	uint32 image;

   110

   111

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

   112

	{

   113

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

   114

		uint variant;

   115

		variant  = ti->x >> 4;

   116

		variant ^= ti->x >> 6;

   117

		variant ^= ti->y >> 4;

   118

		variant -= ti->y >> 6;

   119

		variant &= 3;

   120

		dcts = &_town_draw_tile_data[GetHouseType(ti->tile) << 4 | variant << 2 | GetHouseBuildingStage(ti->tile)];

   121

	}

   122

   123

	if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, ti->tileh);

   124

	DrawGroundSprite(dcts->ground);

   125

   126

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

   127

	image = dcts->building;

   128

	if (image != 0) {

   129

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   130

   131

		AddSortableSpriteToDraw(image,

   132

			ti->x + dcts->subtile_x,

   133

			ti->y + dcts->subtile_y,

   134

			dcts->width + 1,

   135

			dcts->height + 1,

   136

			dcts->dz,

   137

			ti->z

   138

		);

   139

   140

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   141

	}

   142

   143

	{

   144

		int proc = dcts->draw_proc - 1;

   145

   146

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

   147

	}

   148

}

   149

   150

static uint GetSlopeZ_Town(TileIndex tile, uint x, uint y)

   151

{

   152

	return GetTileMaxZ(tile);

   153

}

   154

   155

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   156

{

   157

	return SLOPE_FLAT;

   158

}

   159

   160

static void AnimateTile_Town(TileIndex tile)

   161

{

   162

	int pos, dest;

   163

   164

	if (_tick_counter & 3) return;

   165

   166

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

   167

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

   168

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

   169

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

   170

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

   171

		DeleteAnimatedTile(tile);

   172

		return;

   173

	}

   174

   175

	if (!IsLiftMoving(tile)) {

   176

		int i;

   177

   178

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

   179

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

   180

		 *  the height of 2 'normal' floors.

   181

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

   182

		do {

   183

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

   184

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

   185

   186

		SetLiftDestination(tile, i);

   187

	}

   188

   189

	pos = GetLiftPosition(tile);

   190

	dest = GetLiftDestination(tile) * 6;

   191

	pos += (pos < dest) ? 1 : -1;

   192

	SetLiftPosition(tile, pos);

   193

   194

	if (pos == dest) HaltLift(tile);

   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 (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) * TILE_SIZE, TileY(t->xy) * TILE_SIZE);

   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 (LiftHasDestination(tile)) return;

   258

   259

	IncHouseConstructionTick(tile);

   260

	if (GetHouseConstructionTick(tile) != 0) return;

   261

   262

	IncHouseBuildingStage(tile);  /*increase construction stage of one more step*/

   263

   264

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   265

		/*Now, construction is completed.  Can add population of building to the town*/

   266

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

   267

	}

   268

	MarkTileDirtyByTile(tile);

   269

}

   270

   271

static void MakeTownHouseBigger(TileIndex tile)

   272

{

   273

	uint flags = _house_more_flags[GetHouseType(tile)];

   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 (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   287

		/*Construction is not completed. See if we can go further in construction*/

   288

		MakeTownHouseBigger(tile);

   289

		return;

   290

	}

   291

   292

	house = GetHouseType(tile);

   293

	if ((_housetype_extra_flags[house] & 0x20) && !LiftHasDestination(tile) && CHANCE16(1, 2) && AddAnimatedTile(tile)) BeginLiftMovement(tile);

   294

   295

	t = GetTownByTile(tile);

   296

   297

	r = Random();

   298

   299

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

   300

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

   301

		uint moved;

   302

   303

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

   304

		t->new_max_pass += amt;

   305

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

   306

		t->new_act_pass += moved;

   307

	}

   308

   309

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

   310

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

   311

		uint moved;

   312

   313

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

   314

		t->new_max_mail += amt;

   315

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

   316

		t->new_act_mail += moved;

   317

	}

   318

   319

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

   320

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

   321

   322

		_current_player = OWNER_TOWN;

   323

   324

		ClearTownHouse(t, tile);

   325

   326

		// rebuild with another house?

   327

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

   328

   329

		_current_player = OWNER_NONE;

   330

	}

   331

}

   332

   333

static void ClickTile_Town(TileIndex tile)

   334

{

   335

	/* not used */

   336

}

   337

   338

static int32 ClearTile_Town(TileIndex tile, byte flags)

   339

{

   340

	int house, rating;

   341

	int32 cost;

   342

	Town *t;

   343

   344

	// safety checks

   345

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   346

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

   347

   348

	house = GetHouseType(tile);

   349

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

   350

   351

	rating = _housetype_remove_ratingmod[house];

   352

	_cleared_town_rating += rating;

   353

	_cleared_town = t = GetTownByTile(tile);

   354

   355

	if (IsValidPlayer(_current_player)) {

   356

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

   357

			SetDParam(0, t->index);

   358

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   359

		}

   360

	}

   361

   362

	if (flags & DC_EXEC) {

   363

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   364

		ClearTownHouse(t, tile);

   365

	}

   366

   367

	return cost;

   368

}

   369

   370

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   371

{

   372

	byte type = GetHouseType(tile);

   373

   374

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   375

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   376

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   377

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   378

}

   379

   380

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   381

{

   382

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

   383

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   384

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

   385

		td->str = STR_2058_UNDER_CONSTRUCTION;

   386

	}

   387

   388

	td->owner = OWNER_TOWN;

   389

}

   390

   391

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   392

{

   393

	/* not used */

   394

	return 0;

   395

}

   396

   397

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

   398

{

   399

	/* not used */

   400

}

   401

   402

   403

static const TileIndexDiffC _roadblock_tileadd[] = {

   404

	{ 0, -1},

   405

	{ 1,  0},

   406

	{ 0,  1},

   407

	{-1,  0},

   408

   409

	// Store the first 3 elements again.

   410

	// Lets us rotate without using &3.

   411

	{ 0, -1},

   412

	{ 1,  0},

   413

	{ 0,  1}

   414

};

   415

   416

   417

static bool GrowTown(Town *t);

   418

   419

static void TownTickHandler(Town *t)

   420

{

   421

	if (HASBIT(t->flags12, TOWN_IS_FUNDED)) {

   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 += GetMaxTownIndex() + 1;

   443

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   444

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   445

		uint32 i = _cur_town_ctr;

   446

   447

		if (++_cur_town_ctr > GetMaxTownIndex())

   448

			_cur_town_ctr = 0;

   449

   450

		if (IsValidTownID(i)) TownTickHandler(GetTown(i));

   451

	}

   452

}

   453

   454

static RoadBits GetTownRoadMask(TileIndex tile)

   455

{

   456

	TrackBits b = GetAnyRoadTrackBits(tile);

   458

   459

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   460

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   461

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

   462

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

   463

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

   464

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

   465

	return r;

   466

}

   467

   468

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   469

{

   470

	Slope k;

   471

	Slope slope;

   472

   473

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

   474

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

   475

	TILE_ASSERT(tile);

   476

   477

	for (;;) {

   478

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

   479

		if (GetAnyRoadTrackBits(tile) == 0) {

   480

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

   481

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

   482

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

   483

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

   484

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

   485

				return false;

   486

		}

   487

   488

		slope = GetTileSlope(tile, NULL);

   489

		if (slope == SLOPE_FLAT) {

   490

no_slope:

   491

			// Tile has no slope

   492

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

   493

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

   494

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

   495

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