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 "date.h"

    30

#include "table/town_land.h"

    31

    32

enum {

    33

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

    34

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

    35

	TOWN_POOL_MAX_BLOCKS      = 8000,

    36

};

    37

    38

/**

    39

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

    40

 */

    41

static void TownPoolNewBlock(uint start_item)

    42

{

    43

	Town *t;

    44

    45

	FOR_ALL_TOWNS_FROM(t, start_item)

    46

		t->index = start_item++;

    47

}

    48

    49

/* Initialize the town-pool */

    50

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

    51

    52

// Local

    53

static int _grow_town_result;

    54

    55

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

    56

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

    57

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

    58

    59

static void TownDrawHouseLift(const TileInfo *ti)

    60

{

    61

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

    62

}

    63

    64

typedef void TownDrawTileProc(const TileInfo *ti);

    65

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    66

	TownDrawHouseLift

    67

};

    68

    69

    70

static void DrawTile_Town(TileInfo *ti)

    71

{

    72

	const DrawBuildingsTileStruct *dcts;

    73

	uint32 image;

    74

    75

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

    76

	{

    77

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

    78

		uint variant;

    79

		variant  = ti->x >> 4;

    80

		variant ^= ti->x >> 6;

    81

		variant ^= ti->y >> 4;

    82

		variant -= ti->y >> 6;

    83

		variant &= 3;

    84

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

    85

	}

    86

    87

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

    88

	DrawGroundSprite(dcts->ground);

    89

    90

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

    91

	image = dcts->building;

    92

	if (image != 0) {

    93

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

    94

    95

		AddSortableSpriteToDraw(image,

    96

			ti->x + dcts->subtile_x,

    97

			ti->y + dcts->subtile_y,

    98

			dcts->width + 1,

    99

			dcts->height + 1,

   100

			dcts->dz,

   101

			ti->z

   102

		);

   103

   104

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   105

	}

   106

   107

	{

   108

		int proc = dcts->draw_proc - 1;

   109

   110

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

   111

	}

   112

}

   113

   114

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

   115

{

   116

	return GetTileMaxZ(tile);

   117

}

   118

   119

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   120

{

   121

	return SLOPE_FLAT;

   122

}

   123

   124

static void AnimateTile_Town(TileIndex tile)

   125

{

   126

	int pos, dest;

   127

   128

	if (_tick_counter & 3) return;

   129

   130

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

   131

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

   132

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

   133

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

   134

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

   135

		DeleteAnimatedTile(tile);

   136

		return;

   137

	}

   138

   139

	if (!IsLiftMoving(tile)) {

   140

		int i;

   141

   142

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

   143

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

   144

		 *  the height of 2 'normal' floors.

   145

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

   146

		do {

   147

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

   148

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

   149

   150

		SetLiftDestination(tile, i);

   151

	}

   152

   153

	pos = GetLiftPosition(tile);

   154

	dest = GetLiftDestination(tile) * 6;

   155

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

   156

	SetLiftPosition(tile, pos);

   157

   158

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

   159

   160

	MarkTileDirtyByTile(tile);

   161

}

   162

   163

static void UpdateTownRadius(Town *t);

   164

   165

static bool IsCloseToTown(TileIndex tile, uint dist)

   166

{

   167

	const Town* t;

   168

   169

	FOR_ALL_TOWNS(t) {

   170

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

   171

	}

   172

	return false;

   173

}

   174

   175

static void MarkTownSignDirty(Town *t)

   176

{

   177

	MarkAllViewportsDirty(

   178

		t->sign.left-6,

   179

		t->sign.top-3,

   180

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

   181

		t->sign.top + 45

   182

	);

   183

}

   184

   185

void UpdateTownVirtCoord(Town *t)

   186

{

   187

	Point pt;

   188

   189

	MarkTownSignDirty(t);

   190

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

   191

	SetDParam(0, t->index);

   192

	SetDParam(1, t->population);

   193

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

   194

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   195

	MarkTownSignDirty(t);

   196

}

   197

   198

static void ChangePopulation(Town *t, int mod)

   199

{

   200

	t->population += mod;

   201

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   202

	UpdateTownVirtCoord(t);

   203

   204

	if (_town_sort_order & 2) _town_sort_dirty = true;

   205

}

   206

   207

uint32 GetWorldPopulation(void)

   208

{

   209

	uint32 pop;

   210

	const Town* t;

   211

   212

	pop = 0;

   213

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

   214

	return pop;

   215

}

   216

   217

static void MakeSingleHouseBigger(TileIndex tile)

   218

{

   219

	assert(IsTileType(tile, MP_HOUSE));

   220

   221

	if (LiftHasDestination(tile)) return;

   222

   223

	IncHouseConstructionTick(tile);

   224

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

   225

   226

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

   227

   228

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   229

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

   230

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

   231

	}

   232

	MarkTileDirtyByTile(tile);

   233

}

   234

   235

static void MakeTownHouseBigger(TileIndex tile)

   236

{

   237

	uint flags = _house_more_flags[GetHouseType(tile)];

   238

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

   239

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

   240

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

   241

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

   242

}

   243

   244

static void TileLoop_Town(TileIndex tile)

   245

{

   246

	int house;

   247

	Town *t;

   248

	uint32 r;

   249

   250

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   251

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

   252

		MakeTownHouseBigger(tile);

   253

		return;

   254

	}

   255

   256

	house = GetHouseType(tile);

   257

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

   258

   259

	t = GetTownByTile(tile);

   260

   261

	r = Random();

   262

   263

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

   264

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

   265

		uint moved;

   266

   267

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

   268

		t->new_max_pass += amt;

   269

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

   270

		t->new_act_pass += moved;

   271

	}

   272

   273

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

   274

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

   275

		uint moved;

   276

   277

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

   278

		t->new_max_mail += amt;

   279

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

   280

		t->new_act_mail += moved;

   281

	}

   282

   283

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

   284

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

   285

   286

		_current_player = OWNER_TOWN;

   287

   288

		ClearTownHouse(t, tile);

   289

   290

		// rebuild with another house?

   291

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

   292

   293

		_current_player = OWNER_NONE;

   294

	}

   295

}

   296

   297

static void ClickTile_Town(TileIndex tile)

   298

{

   299

	/* not used */

   300

}

   301

   302

static int32 ClearTile_Town(TileIndex tile, byte flags)

   303

{

   304

	int house, rating;

   305

	int32 cost;

   306

	Town *t;

   307

   308

	// safety checks

   309

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   310

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

   311

   312

	house = GetHouseType(tile);

   313

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

   314

   315

	rating = _housetype_remove_ratingmod[house];

   316

	_cleared_town_rating += rating;

   317

	_cleared_town = t = GetTownByTile(tile);

   318

   319

	if (_current_player < MAX_PLAYERS) {

   320

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

   321

			SetDParam(0, t->index);

   322

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   323

		}

   324

	}

   325

   326

	if (flags & DC_EXEC) {

   327

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   328

		ClearTownHouse(t, tile);

   329

	}

   330

   331

	return cost;

   332

}

   333

   334

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   335

{

   336

	byte type = GetHouseType(tile);

   337

   338

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   339

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   340

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   341

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   342

}

   343

   344

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   345

{

   346

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

   347

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   348

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

   349

		td->str = STR_2058_UNDER_CONSTRUCTION;

   350

	}

   351

   352

	td->owner = OWNER_TOWN;

   353

}

   354

   355

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   356

{

   357

	/* not used */

   358

	return 0;

   359

}

   360

   361

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

   362

{

   363

	/* not used */

   364

}

   365

   366

   367

static const TileIndexDiffC _roadblock_tileadd[] = {

   368

	{ 0, -1},

   369

	{ 1,  0},

   370

	{ 0,  1},

   371

	{-1,  0},

   372

   373

	// Store the first 3 elements again.

   374

	// Lets us rotate without using &3.

   375

	{ 0, -1},

   376

	{ 1,  0},

   377

	{ 0,  1}

   378

};

   379

   380

   381

static bool GrowTown(Town *t);

   382

   383

static void TownTickHandler(Town *t)

   384

{

   385

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

   386

		int i = t->grow_counter - 1;

   387

		if (i < 0) {

   388

			if (GrowTown(t)) {

   389

				i = t->growth_rate;

   390

			} else {

   391

				i = 0;

   392

			}

   393

		}

   394

		t->grow_counter = i;

   395

	}

   396

   397

	UpdateTownRadius(t);

   398

}

   399

   400

void OnTick_Town(void)

   401

{

   402

	if (_game_mode == GM_EDITOR) return;

   403

   404

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

   405

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

   406

	for (_cur_town_iter += GetTownPoolSize();

   407

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   408

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   409

		uint32 i = _cur_town_ctr;

   410

		Town *t;

   411

   412

		if (++_cur_town_ctr >= GetTownPoolSize())

   413

			_cur_town_ctr = 0;

   414

   415

		t = GetTown(i);

   416

   417

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

   418

	}

   419

}

   420

   421

static RoadBits GetTownRoadMask(TileIndex tile)

   422

{

   423

	TrackBits b = GetAnyRoadTrackBits(tile);

   424

	RoadBits r = 0;

   425

   426

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   427

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   428

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

   429

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

   430

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

   431

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

   432

	return r;

   433

}

   434

   435

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   436

{

   437

	Slope k;

   438

	Slope slope;

   439

   440

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

   441

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

   442

	TILE_ASSERT(tile);

   443

   444

	for (;;) {

   445

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

   446

		if (GetAnyRoadTrackBits(tile) == 0) {

   447

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

   448

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

   449

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

   450

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

   451

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

   452

				return false;

   453

		}

   454

   455

		slope = GetTileSlope(tile, NULL);

   456

		if (slope == SLOPE_FLAT) {

   457

no_slope:

   458

			// Tile has no slope

   459

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

   460

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

   461

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

   462

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

   463

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

   464

				return false;

   465

   466

			// Otherwise allow

   467

			return true;

   468

		}

   469

   470

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

   471

		// maybe terraform some.

   472

		k = (dir & 1) ? SLOPE_NE : SLOPE_NW;

   473

		if (k != slope && ComplementSlope(k) != slope) {

   474

			uint32 r = Random();

   475

   476

			if (CHANCE16I(1, 8, r) && !_generating_world) {

   477

				int32 res;

   478

   479

				if (CHANCE16I(1, 16, r)) {

   480

					res = DoCommand(tile, slope, 0, DC_EXEC | DC_AUTO | DC_NO_WATER,

   481

					                      CMD_TERRAFORM_LAND);

   482

				} else {

   483

					res = DoCommand(tile, slope ^ 0xF, 1, DC_EXEC | DC_AUTO | DC_NO_WATER,

   484

					                      CMD_TERRAFORM_LAND);

   485

				}

   486

				if (CmdFailed(res) && CHANCE16I(1, 3, r)) {

   487

					// We can consider building on the slope, though.

   488

					goto no_slope;

   489

				}

   490

			}

   491

			return false;

   492

		}

   493

		return true;

   494

	}

   495

}