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

#include "genworld.h"

    32

    33

enum {

    34

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

    35

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

    36

	TOWN_POOL_MAX_BLOCKS      = 8000,

    37

};

    38

    39

/**

    40

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

    41

 */

    42

static void TownPoolNewBlock(uint start_item)

    43

{

    44

	Town *t;

    45

    46

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

    47

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

    48

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

    49

}

    50

    51

/* Initialize the town-pool */

    52

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

    53

    54

// Local

    55

static int _grow_town_result;

    56

    57

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

    58

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

    59

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

    60

    61

static void TownDrawHouseLift(const TileInfo *ti)

    62

{

    63

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

    64

}

    65

    66

typedef void TownDrawTileProc(const TileInfo *ti);

    67

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    68

	TownDrawHouseLift

    69

};

    70

    71

    72

static void DrawTile_Town(TileInfo *ti)

    73

{

    74

	const DrawBuildingsTileStruct *dcts;

    75

	uint32 image;

    76

    77

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

    78

	{

    79

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

    80

		uint variant;

    81

		variant  = ti->x >> 4;

    82

		variant ^= ti->x >> 6;

    83

		variant ^= ti->y >> 4;

    84

		variant -= ti->y >> 6;

    85

		variant &= 3;

    86

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

    87

	}

    88

    89

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

    90

	DrawGroundSprite(dcts->ground);

    91

    92

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

    93

	image = dcts->building;

    94

	if (image != 0) {

    95

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

    96

    97

		AddSortableSpriteToDraw(image,

    98

			ti->x + dcts->subtile_x,

    99

			ti->y + dcts->subtile_y,

   100

			dcts->width + 1,

   101

			dcts->height + 1,

   102

			dcts->dz,

   103

			ti->z

   104

		);

   105

   106

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   107

	}

   108

   109

	{

   110

		int proc = dcts->draw_proc - 1;

   111

   112

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

   113

	}

   114

}

   115

   116

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

   117

{

   118

	return GetTileMaxZ(tile);

   119

}

   120

   121

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   122

{

   123

	return SLOPE_FLAT;

   124

}

   125

   126

static void AnimateTile_Town(TileIndex tile)

   127

{

   128

	int pos, dest;

   129

   130

	if (_tick_counter & 3) return;

   131

   132

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

   133

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

   134

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

   135

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

   136

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

   137

		DeleteAnimatedTile(tile);

   138

		return;

   139

	}

   140

   141

	if (!IsLiftMoving(tile)) {

   142

		int i;

   143

   144

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

   145

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

   146

		 *  the height of 2 'normal' floors.

   147

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

   148

		do {

   149

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

   150

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

   151

   152

		SetLiftDestination(tile, i);

   153

	}

   154

   155

	pos = GetLiftPosition(tile);

   156

	dest = GetLiftDestination(tile) * 6;

   157

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

   158

	SetLiftPosition(tile, pos);

   159

   160

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

   161

   162

	MarkTileDirtyByTile(tile);

   163

}

   164

   165

static void UpdateTownRadius(Town *t);

   166

   167

static bool IsCloseToTown(TileIndex tile, uint dist)

   168

{

   169

	const Town* t;

   170

   171

	FOR_ALL_TOWNS(t) {

   172

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

   173

	}

   174

	return false;

   175

}

   176

   177

static void MarkTownSignDirty(Town *t)

   178

{

   179

	MarkAllViewportsDirty(

   180

		t->sign.left-6,

   181

		t->sign.top-3,

   182

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

   183

		t->sign.top + 45

   184

	);

   185

}

   186

   187

void UpdateTownVirtCoord(Town *t)

   188

{

   189

	Point pt;

   190

   191

	MarkTownSignDirty(t);

   192

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

   193

	SetDParam(0, t->index);

   194

	SetDParam(1, t->population);

   195

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

   196

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   197

	MarkTownSignDirty(t);

   198

}

   199

   200

static void ChangePopulation(Town *t, int mod)

   201

{

   202

	t->population += mod;

   203

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   204

	UpdateTownVirtCoord(t);

   205

   206

	if (_town_sort_order & 2) _town_sort_dirty = true;

   207

}

   208

   209

uint32 GetWorldPopulation(void)

   210

{

   211

	uint32 pop;

   212

	const Town* t;

   213

   214

	pop = 0;

   215

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

   216

	return pop;

   217

}

   218

   219

static void MakeSingleHouseBigger(TileIndex tile)

   220

{

   221

	assert(IsTileType(tile, MP_HOUSE));

   222

   223

	if (LiftHasDestination(tile)) return;

   224

   225

	IncHouseConstructionTick(tile);

   226

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

   227

   228

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

   229

   230

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   231

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

   232

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

   233

	}

   234

	MarkTileDirtyByTile(tile);

   235

}

   236

   237

static void MakeTownHouseBigger(TileIndex tile)

   238

{

   239

	uint flags = _house_more_flags[GetHouseType(tile)];

   240

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

   241

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

   242

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

   243

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

   244

}

   245

   246

static void TileLoop_Town(TileIndex tile)

   247

{

   248

	int house;

   249

	Town *t;

   250

	uint32 r;

   251

   252

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   253

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

   254

		MakeTownHouseBigger(tile);

   255

		return;

   256

	}

   257

   258

	house = GetHouseType(tile);

   259

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

   260

   261

	t = GetTownByTile(tile);

   262

   263

	r = Random();

   264

   265

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

   266

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

   267

		uint moved;

   268

   269

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

   270

		t->new_max_pass += amt;

   271

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

   272

		t->new_act_pass += moved;

   273

	}

   274

   275

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

   276

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

   277

		uint moved;

   278

   279

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

   280

		t->new_max_mail += amt;

   281

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

   282

		t->new_act_mail += moved;

   283

	}

   284

   285

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

   286

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

   287

   288

		_current_player = OWNER_TOWN;

   289

   290

		ClearTownHouse(t, tile);

   291

   292

		// rebuild with another house?

   293

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

   294

   295

		_current_player = OWNER_NONE;

   296

	}

   297

}

   298

   299

static void ClickTile_Town(TileIndex tile)

   300

{

   301

	/* not used */

   302

}

   303

   304

static int32 ClearTile_Town(TileIndex tile, byte flags)

   305

{

   306

	int house, rating;

   307

	int32 cost;

   308

	Town *t;

   309

   310

	// safety checks

   311

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   312

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

   313

   314

	house = GetHouseType(tile);

   315

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

   316

   317

	rating = _housetype_remove_ratingmod[house];

   318

	_cleared_town_rating += rating;

   319

	_cleared_town = t = GetTownByTile(tile);

   320

   321

	if (_current_player < MAX_PLAYERS) {

   322

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

   323

			SetDParam(0, t->index);

   324

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   325

		}

   326

	}

   327

   328

	if (flags & DC_EXEC) {

   329

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   330

		ClearTownHouse(t, tile);

   331

	}

   332

   333

	return cost;

   334

}

   335

   336

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   337

{

   338

	byte type = GetHouseType(tile);

   339

   340

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   341

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   342

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   343

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   344

}

   345

   346

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   347

{

   348

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

   349

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   350

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

   351

		td->str = STR_2058_UNDER_CONSTRUCTION;

   352

	}

   353

   354

	td->owner = OWNER_TOWN;

   355

}

   356

   357

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   358

{

   359

	/* not used */

   360

	return 0;

   361

}

   362

   363

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

   364

{

   365

	/* not used */

   366

}

   367

   368

   369

static const TileIndexDiffC _roadblock_tileadd[] = {

   370

	{ 0, -1},

   371

	{ 1,  0},

   372

	{ 0,  1},

   373

	{-1,  0},

   374

   375

	// Store the first 3 elements again.

   376

	// Lets us rotate without using &3.

   377

	{ 0, -1},

   378

	{ 1,  0},

   379

	{ 0,  1}

   380

};

   381

   382

   383

static bool GrowTown(Town *t);

   384

   385

static void TownTickHandler(Town *t)

   386

{

   387

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

   388

		int i = t->grow_counter - 1;

   389

		if (i < 0) {

   390

			if (GrowTown(t)) {

   391

				i = t->growth_rate;

   392

			} else {

   393

				i = 0;

   394

			}

   395

		}

   396

		t->grow_counter = i;

   397

	}

   398

   399

	UpdateTownRadius(t);

   400

}

   401

   402

void OnTick_Town(void)

   403

{

   404

	if (_game_mode == GM_EDITOR) return;

   405

   406

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

   407

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

   408

	for (_cur_town_iter += GetTownPoolSize();

   409

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   410

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   411

		uint32 i = _cur_town_ctr;

   412

		Town *t;

   413

   414

		if (++_cur_town_ctr >= GetTownPoolSize())

   415

			_cur_town_ctr = 0;

   416

   417

		t = GetTown(i);

   418

   419

		if (IsValidTown(t)) TownTickHandler(t);

   420

	}

   421

}

   422

   423

static RoadBits GetTownRoadMask(TileIndex tile)

   424

{

   425

	TrackBits b = GetAnyRoadTrackBits(tile);

   426

	RoadBits r = 0;

   427

   428

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   429

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   430

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

   431

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

   432

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

   433

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

   434

	return r;

   435

}

   436

   437

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   438

{

   439

	Slope k;

   440

	Slope slope;

   441

   442

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

   443

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

   444

	TILE_ASSERT(tile);

   445

   446

	for (;;) {

   447

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

   448

		if (GetAnyRoadTrackBits(tile) == 0) {

   449

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

   450

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

   451

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

   452

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

   453

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

   454

				return false;

   455

		}

   456

   457

		slope = GetTileSlope(tile, NULL);

   458

		if (slope == SLOPE_FLAT) {

   459

no_slope:

   460

			// Tile has no slope

   461

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

   462

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

   463

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

   464

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

   465

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

   466

				return false;

   467

   468

			// Otherwise allow

   469

			return true;

   470

		}

   471

   472

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

   473

		// maybe terraform some.

   474

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

   475

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

   476

			uint32 r = Random();

   477

   478

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

   479

				int32 res;

   480

   481

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

   482

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

   483

					                      CMD_TERRAFORM_LAND);

   484

				} else {

   485

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

   486

					                      CMD_TERRAFORM_LAND);

   487

				}

   488

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

   489

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

   490

					goto no_slope;

   491

				}

   492

			}

   493

			return false;

   494

		}

   495

		return true;