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

    30

enum {

    31

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

    32

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

    33

	TOWN_POOL_MAX_BLOCKS      = 8000,

    34

};

    35

    36

/**

    37

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

    38

 */

    39

static void TownPoolNewBlock(uint start_item)

    40

{

    41

	Town *t;

    42

    43

	FOR_ALL_TOWNS_FROM(t, start_item)

    44

		t->index = start_item++;

    45

}

    46

    47

/* Initialize the town-pool */

    48

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

    49

    50

// Local

    51

static int _grow_town_result;

    52

    53

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

    54

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

    55

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

    56

    57

typedef struct DrawTownTileStruct {

    58

	SpriteID sprite_1;

    59

	SpriteID sprite_2;

    60

    61

	byte subtile_x:4;

    62

	byte subtile_y:4;

    63

	byte width:4;

    64

	byte height:4;

    65

	byte dz;

    66

	byte proc;

    67

} DrawTownTileStruct;

    68

    69

#include "table/town_land.h"

    70

    71

    72

static void TownDrawHouseLift(const TileInfo *ti)

    73

{

    74

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

    75

}

    76

    77

typedef void TownDrawTileProc(const TileInfo *ti);

    78

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    79

	TownDrawHouseLift

    80

};

    81

    82

    83

static void DrawTile_Town(TileInfo *ti)

    84

{

    85

	const DrawTownTileStruct *dcts;

    86

	byte z;

    87

	uint32 image;

    88

    89

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

    90

	{

    91

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

    92

		byte gfx   = GetHouseType(ti->tile);

    93

		byte stage = GetHouseBuildingStage(ti->tile);

    94

		uint variant;

    95

		variant  = ti->x >> 4;

    96

		variant ^= ti->x >> 6;

    97

		variant ^= ti->y >> 4;

    98

		variant -= ti->y >> 6;

    99

		variant &= 3;

   100

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

   101

	}

   102

   103

	z = ti->z;

   104

   105

	/* Add bricks below the house? */

   106

	if (ti->tileh) {

   107

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

   108

		AddChildSpriteScreen(dcts->sprite_1, 31, 1);

   109

		z += 8;

   110

	} else {

   111

		/* Else draw regular ground */

   112

		DrawGroundSprite(dcts->sprite_1);

   113

	}

   114

   115

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

   116

	image = dcts->sprite_2;

   117

	if (image != 0) {

   118

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   119

   120

		AddSortableSpriteToDraw(image,

   121

			ti->x + dcts->subtile_x,

   122

			ti->y + dcts->subtile_y,

   123

			dcts->width + 1,

   124

			dcts->height + 1,

   125

			dcts->dz,

   126

			z);

   127

   128

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   129

	}

   130

   131

	{

   132

		int proc = dcts->proc - 1;

   133

   134

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

   135

	}

   136

}

   137

   138

static uint GetSlopeZ_Town(const TileInfo* ti)

   139

{

   140

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

   141

}

   142

   143

static uint GetSlopeTileh_Town(TileIndex tile, uint tileh)

   144

{

   145

	return 0;

   146

}

   147

   148

static void AnimateTile_Town(TileIndex tile)

   149

{

   150

	int pos, dest;

   151

   152

	if (_tick_counter & 3) return;

   153

   154

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

   155

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

   156

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

   157

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

   158

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

   159

		DeleteAnimatedTile(tile);

   160

		return;

   161

	}

   162

   163

	if (!IsLiftMoving(tile)) {

   164

		int i;

   165

   166

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

   167

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

   168

		 *  the height of 2 'normal' floors.

   169

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

   170

		do {

   171

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

   172

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

   173

   174

		SetLiftDestination(tile, i);

   175

	}

   176

   177

	pos = GetLiftPosition(tile);

   178

	dest = GetLiftDestination(tile) * 6;

   179

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

   180

	SetLiftPosition(tile, pos);

   181

   182

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

   183

   184

	MarkTileDirtyByTile(tile);

   185

}

   186

   187

static void UpdateTownRadius(Town *t);

   188

   189

static bool IsCloseToTown(TileIndex tile, uint dist)

   190

{

   191

	const Town* t;

   192

   193

	FOR_ALL_TOWNS(t) {

   194

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

   195

	}

   196

	return false;

   197

}

   198

   199

static void MarkTownSignDirty(Town *t)

   200

{

   201

	MarkAllViewportsDirty(

   202

		t->sign.left-6,

   203

		t->sign.top-3,

   204

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

   205

		t->sign.top + 45

   206

	);

   207

}

   208

   209

void UpdateTownVirtCoord(Town *t)

   210

{

   211

	Point pt;

   212

   213

	MarkTownSignDirty(t);

   214

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

   215

	SetDParam(0, t->index);

   216

	SetDParam(1, t->population);

   217

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

   218

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   219

	MarkTownSignDirty(t);

   220

}

   221

   222

static void ChangePopulation(Town *t, int mod)

   223

{

   224

	t->population += mod;

   225

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   226

	UpdateTownVirtCoord(t);

   227

   228

	if (_town_sort_order & 2) _town_sort_dirty = true;

   229

}

   230

   231

uint32 GetWorldPopulation(void)

   232

{

   233

	uint32 pop;

   234

	const Town* t;

   235

   236

	pop = 0;

   237

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

   238

	return pop;

   239

}

   240

   241

static void MakeSingleHouseBigger(TileIndex tile)

   242

{

   243

	assert(IsTileType(tile, MP_HOUSE));

   244

   245

	if (LiftHasDestination(tile)) return;

   246

   247

	IncHouseConstructionTick(tile);

   248

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

   249

   250

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

   251

   252

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   253

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

   254

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

   255

	}

   256

	MarkTileDirtyByTile(tile);

   257

}

   258

   259

static void MakeTownHouseBigger(TileIndex tile)

   260

{

   261

	uint flags = _house_more_flags[GetHouseType(tile)];

   262

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

   263

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

   264

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

   265

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

   266

}

   267

   268

static void TileLoop_Town(TileIndex tile)

   269

{

   270

	int house;

   271

	Town *t;

   272

	uint32 r;

   273

   274

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   275

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

   276

		MakeTownHouseBigger(tile);

   277

		return;

   278

	}

   279

   280

	house = GetHouseType(tile);

   281

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

   282

   283

	t = GetTownByTile(tile);

   284

   285

	r = Random();

   286

   287

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

   288

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

   289

		uint moved;

   290

   291

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

   292

		t->new_max_pass += amt;

   293

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

   294

		t->new_act_pass += moved;

   295

	}

   296

   297

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

   298

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

   299

		uint moved;

   300

   301

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

   302

		t->new_max_mail += amt;

   303

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

   304

		t->new_act_mail += moved;

   305

	}

   306

   307

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

   308

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

   309

   310

		_current_player = OWNER_TOWN;

   311

   312

		ClearTownHouse(t, tile);

   313

   314

		// rebuild with another house?

   315

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

   316

   317

		_current_player = OWNER_NONE;

   318

	}

   319

}

   320

   321

static void ClickTile_Town(TileIndex tile)

   322

{

   323

	/* not used */

   324

}

   325

   326

static int32 ClearTile_Town(TileIndex tile, byte flags)

   327

{

   328

	int house, rating;

   329

	int32 cost;

   330

	Town *t;

   331

   332

	// safety checks

   333

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   334

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

   335

   336

	house = GetHouseType(tile);

   337

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

   338

   339

	rating = _housetype_remove_ratingmod[house];

   340

	_cleared_town_rating += rating;

   341

	_cleared_town = t = GetTownByTile(tile);

   342

   343

	if (_current_player < MAX_PLAYERS) {

   344

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

   345

			SetDParam(0, t->index);

   346

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   347

		}

   348

	}

   349

   350

	if (flags & DC_EXEC) {

   351

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   352

		ClearTownHouse(t, tile);

   353

	}

   354

   355

	return cost;

   356

}

   357

   358

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   359

{

   360

	byte type = GetHouseType(tile);

   361

   362

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   363

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   364

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   365

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   366

}

   367

   368

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   369

{

   370

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

   371

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   372

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

   373

		td->str = STR_2058_UNDER_CONSTRUCTION;

   374

	}

   375

   376

	td->owner = OWNER_TOWN;

   377

}

   378

   379

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   380

{

   381

	/* not used */

   382

	return 0;

   383

}

   384

   385

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

   386

{

   387

	/* not used */

   388

}

   389

   390

   391

static const TileIndexDiffC _roadblock_tileadd[] = {

   392

	{ 0, -1},

   393

	{ 1,  0},

   394

	{ 0,  1},

   395

	{-1,  0},

   396

   397

	// Store the first 3 elements again.

   398

	// Lets us rotate without using &3.

   399

	{ 0, -1},

   400

	{ 1,  0},

   401

	{ 0,  1}

   402

};

   403

   404

   405

static bool GrowTown(Town *t);

   406

   407

static void TownTickHandler(Town *t)

   408

{

   409

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

   410

		int i = t->grow_counter - 1;

   411

		if (i < 0) {

   412

			if (GrowTown(t)) {

   413

				i = t->growth_rate;

   414

			} else {

   415

				i = 0;

   416

			}

   417

		}

   418

		t->grow_counter = i;

   419

	}

   420

   421

	UpdateTownRadius(t);

   422

}

   423

   424

void OnTick_Town(void)

   425

{

   426

	if (_game_mode == GM_EDITOR) return;

   427

   428

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

   429

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

   430

	for (_cur_town_iter += GetTownPoolSize();

   431

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   432

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   433

		uint32 i = _cur_town_ctr;

   434

		Town *t;

   435

   436

		if (++_cur_town_ctr >= GetTownPoolSize())

   437

			_cur_town_ctr = 0;

   438

   439

		t = GetTown(i);

   440

   441

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

   442

	}

   443

}

   444

   445

static RoadBits GetTownRoadMask(TileIndex tile)

   446

{

   447

	TrackBits b = GetAnyRoadTrackBits(tile);

   448

	RoadBits r = 0;

   449

   450

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   451

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   452

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

   453

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

   454

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

   455

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

   456

	return r;

   457

}

   458

   459

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   460

{

   461

	uint k;

   462

	uint slope;

   463

   464

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

   465

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

   466

	TILE_ASSERT(tile);

   467

   468

	for (;;) {

   469

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

   470

		if (GetAnyRoadTrackBits(tile) == 0) {

   471

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

   472

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

   473

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

   474

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

   475

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

   476

				return false;

   477

		}

   478

   479

		slope = GetTileSlope(tile, NULL);

   480

		if (slope == 0) {

   481

no_slope:

   482

			// Tile has no slope

   483

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

   484

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

   485

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

   486

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

   487

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

   488

				return false;

   489

   490

			// Otherwise allow

   491

			return true;

   492

		}

   493

   494

		// If the tile is not a slope in the right direction, then

   495

		// maybe terraform some.

   496

		if ((k = (dir&1)?0xC:0x9) != slope && (k^0xF) != slope) {

   497

			uint32 r = Random();

   498