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_TUNNEL:

    72

			case MP_STREET_BRIDGE:

    73

				if (IsTileOwner(tile, OWNER_TOWN) &&

    74

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

    75

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

    76

				break;

    77

    78

			default:

    79

				break;

    80

		}

    81

	}

    82

    83

	DeleteName(t->townnametype);

    84

	DeleteSubsidyWithTown(t->index);

    85

    86

	MarkWholeScreenDirty();

    87

}

    88

    89

// Local

    90

static int _grow_town_result;

    91

    92

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

    93

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

    94

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

    95

    96

static void TownDrawHouseLift(const TileInfo *ti)

    97

{

    98

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

    99

}

   100

   101

typedef void TownDrawTileProc(const TileInfo *ti);

   102

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

   103

	TownDrawHouseLift

   104

};

   105

   106

   107

static void DrawTile_Town(TileInfo *ti)

   108

{

   109

	const DrawBuildingsTileStruct *dcts;

   110

	uint32 image;

   111

   112

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

   113

	{

   114

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

   115

		uint variant;

   116

		variant  = ti->x >> 4;

   117

		variant ^= ti->x >> 6;

   118

		variant ^= ti->y >> 4;

   119

		variant -= ti->y >> 6;

   120

		variant &= 3;

   121

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

   122

	}

   123

   124

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

   125

	DrawGroundSprite(dcts->ground);

   126

   127

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

   128

	image = dcts->building;

   129

	if (image != 0) {

   130

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   131

   132

		AddSortableSpriteToDraw(image,

   133

			ti->x + dcts->subtile_x,

   134

			ti->y + dcts->subtile_y,

   135

			dcts->width + 1,

   136

			dcts->height + 1,

   137

			dcts->dz,

   138

			ti->z

   139

		);

   140

   141

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   142

	}

   143

   144

	{

   145

		int proc = dcts->draw_proc - 1;

   146

   147

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

   148

	}

   149

}

   150

   151

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

   152

{

   153

	return GetTileMaxZ(tile);

   154

}

   155

   156

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   157

{

   158

	return SLOPE_FLAT;

   159

}

   160

   161

static void AnimateTile_Town(TileIndex tile)

   162

{

   163

	int pos, dest;

   164

   165

	if (_tick_counter & 3) 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[GetHouseType(tile)] & 0x20)) {

   172

		DeleteAnimatedTile(tile);

   173

		return;

   174

	}

   175

   176

	if (!IsLiftMoving(tile)) {

   177

		int i;

   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 == GetLiftPosition(tile));

   186

   187

		SetLiftDestination(tile, i);

   188

	}

   189

   190

	pos = GetLiftPosition(tile);

   191

	dest = GetLiftDestination(tile) * 6;

   192

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

   193

	SetLiftPosition(tile, pos);

   194

   195

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

   196

   197

	MarkTileDirtyByTile(tile);

   198

}

   199

   200

static void UpdateTownRadius(Town *t);

   201

   202

static bool IsCloseToTown(TileIndex tile, uint dist)

   203

{

   204

	const Town* t;

   205

   206

	FOR_ALL_TOWNS(t) {

   207

		if (DistanceManhattan(tile, t->xy) < dist) return true;

   208

	}

   209

	return false;

   210

}

   211

   212

static void MarkTownSignDirty(Town *t)

   213

{

   214

	MarkAllViewportsDirty(

   215

		t->sign.left-6,

   216

		t->sign.top-3,

   217

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

   218

		t->sign.top + 45

   219

	);

   220

}

   221

   222

void UpdateTownVirtCoord(Town *t)

   223

{

   224

	Point pt;

   225

   226

	MarkTownSignDirty(t);

   227

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

   228

	SetDParam(0, t->index);

   229

	SetDParam(1, t->population);

   230

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

   231

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   232

	MarkTownSignDirty(t);

   233

}

   234

   235

static void ChangePopulation(Town *t, int mod)

   236

{

   237

	t->population += mod;

   238

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   239

	UpdateTownVirtCoord(t);

   240

   241

	if (_town_sort_order & 2) _town_sort_dirty = true;

   242

}

   243

   244

uint32 GetWorldPopulation(void)

   245

{

   246

	uint32 pop;

   247

	const Town* t;

   248

   249

	pop = 0;

   250

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

   251

	return pop;

   252

}

   253

   254

static void MakeSingleHouseBigger(TileIndex tile)

   255

{

   256

	assert(IsTileType(tile, MP_HOUSE));

   257

   258

	if (LiftHasDestination(tile)) return;

   259

   260

	IncHouseConstructionTick(tile);

   261

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

   262

   263

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

   264

   265

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   266

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

   267

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

   268

	}

   269

	MarkTileDirtyByTile(tile);

   270

}

   271

   272

static void MakeTownHouseBigger(TileIndex tile)

   273

{

   274

	uint flags = _house_more_flags[GetHouseType(tile)];

   275

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

   276

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

   277

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

   278

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

   279

}

   280

   281

static void TileLoop_Town(TileIndex tile)

   282

{

   283

	int house;

   284

	Town *t;

   285

	uint32 r;

   286

   287

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   288

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

   289

		MakeTownHouseBigger(tile);

   290

		return;

   291

	}

   292

   293

	house = GetHouseType(tile);

   294

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

   295

   296

	t = GetTownByTile(tile);

   297

   298

	r = Random();

   299

   300

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

   301

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

   302

		uint moved;

   303

   304

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

   305

		t->new_max_pass += amt;

   306

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

   307

		t->new_act_pass += moved;

   308

	}

   309

   310

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

   311

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

   312

		uint moved;

   313

   314

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

   315

		t->new_max_mail += amt;

   316

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

   317

		t->new_act_mail += moved;

   318

	}

   319

   320

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

   321

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

   322

   323

		_current_player = OWNER_TOWN;

   324

   325

		ClearTownHouse(t, tile);

   326

   327

		// rebuild with another house?

   328

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

   329

   330

		_current_player = OWNER_NONE;

   331

	}

   332

}

   333

   334

static void ClickTile_Town(TileIndex tile)

   335

{

   336

	/* not used */

   337

}

   338

   339

static int32 ClearTile_Town(TileIndex tile, byte flags)

   340

{

   341

	int house, rating;

   342

	int32 cost;

   343

	Town *t;

   344

   345

	// safety checks

   346

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   347

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

   348

   349

	house = GetHouseType(tile);

   350

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

   351

   352

	rating = _housetype_remove_ratingmod[house];

   353

	_cleared_town_rating += rating;

   354

	_cleared_town = t = GetTownByTile(tile);

   355

   356

	if (IsValidPlayer(_current_player)) {

   357

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

   358

			SetDParam(0, t->index);

   359

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   360

		}

   361

	}

   362

   363

	if (flags & DC_EXEC) {

   364

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   365

		ClearTownHouse(t, tile);

   366

	}

   367

   368

	return cost;

   369

}

   370

   371

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   372

{

   373

	byte type = GetHouseType(tile);

   374

   375

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   376

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   377

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   378

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   379

}

   380

   381

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   382

{

   383

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

   384

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   385

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

   386

		td->str = STR_2058_UNDER_CONSTRUCTION;

   387

	}

   388

   389

	td->owner = OWNER_TOWN;

   390

}

   391

   392

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   393

{

   394

	/* not used */

   395

	return 0;

   396

}

   397

   398

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

   399

{

   400

	/* not used */

   401

}

   402

   403

   404

static const TileIndexDiffC _roadblock_tileadd[] = {

   405

	{ 0, -1},

   406

	{ 1,  0},

   407

	{ 0,  1},

   408

	{-1,  0},

   409

   410

	// Store the first 3 elements again.

   411

	// Lets us rotate without using &3.

   412

	{ 0, -1},

   413

	{ 1,  0},

   414

	{ 0,  1}

   415

};

   416

   417

   418

static bool GrowTown(Town *t);

   419

   420

static void TownTickHandler(Town *t)

   421

{

   422

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

   423

		int i = t->grow_counter - 1;

   424

		if (i < 0) {

   425

			if (GrowTown(t)) {

   426

				i = t->growth_rate;

   427

			} else {

   428

				i = 0;

   429

			}

   430

		}

   431

		t->grow_counter = i;

   432

	}

   433

   434

	UpdateTownRadius(t);

   435

}

   436

   437

void OnTick_Town(void)

   438

{

   439

	if (_game_mode == GM_EDITOR) return;

   440

   441

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

   442

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

   443

	for (_cur_town_iter += GetMaxTownIndex() + 1;

   444

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   445

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   446

		uint32 i = _cur_town_ctr;

   447

   448

		if (++_cur_town_ctr > GetMaxTownIndex())

   449

			_cur_town_ctr = 0;

   450

   451

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

   452

	}

   453

}

   454

   455

static RoadBits GetTownRoadMask(TileIndex tile)

   456

{

   457

	TrackBits b = GetAnyRoadTrackBits(tile);

   458

	RoadBits r = 0;

   459

   460

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   461

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   462

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

   463

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

   464

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

   465

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

   466

	return r;

   467

}

   468

   469

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   470

{

   471

	Slope k;

   472

	Slope slope;

   473

   474

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

   475

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

   476

	TILE_ASSERT(tile);

   477

   478

	for (;;) {

   479

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

   480

		if (GetAnyRoadTrackBits(tile) == 0) {

   481

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

   482

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

   483

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

   484

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

   485

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

   486

				return false;

   487

		}

   488

   489

		slope = GetTileSlope(tile, NULL);

   490

		if (slope == SLOPE_FLAT) {

   491

no_slope:

   492

			// Tile has no slope

   493

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

   494

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

   495

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