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

	FOR_ALL_TOWNS_FROM(t, start_item)

    47

		t->index = start_item++;

    48

}

    49

    50

/* Initialize the town-pool */

    51

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

    52

    53

// Local

    54

static int _grow_town_result;

    55

    56

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

    57

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

    58

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

    59

    60

static void TownDrawHouseLift(const TileInfo *ti)

    61

{

    62

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

    63

}

    64

    65

typedef void TownDrawTileProc(const TileInfo *ti);

    66

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    67

	TownDrawHouseLift

    68

};

    69

    70

    71

static void DrawTile_Town(TileInfo *ti)

    72

{

    73

	const DrawBuildingsTileStruct *dcts;

    74

	uint32 image;

    75

    76

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

    77

	{

    78

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

    79

		uint variant;

    80

		variant  = ti->x >> 4;

    81

		variant ^= ti->x >> 6;

    82

		variant ^= ti->y >> 4;

    83

		variant -= ti->y >> 6;

    84

		variant &= 3;

    85

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

    86

	}

    87

    88

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

    89

	DrawGroundSprite(dcts->ground);

    90

    91

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

    92

	image = dcts->building;

    93

	if (image != 0) {

    94

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

    95

    96

		AddSortableSpriteToDraw(image,

    97

			ti->x + dcts->subtile_x,

    98

			ti->y + dcts->subtile_y,

    99

			dcts->width + 1,

   100

			dcts->height + 1,

   101

			dcts->dz,

   102

			ti->z

   103

		);

   104

   105

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   106

	}

   107

   108

	{

   109

		int proc = dcts->draw_proc - 1;

   110

   111

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

   112

	}

   113

}

   114

   115

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

   116

{

   117

	return GetTileMaxZ(tile);

   118

}

   119

   120

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   121

{

   122

	return SLOPE_FLAT;

   123

}

   124

   125

static void AnimateTile_Town(TileIndex tile)

   126

{

   127

	int pos, dest;

   128

   129

	if (_tick_counter & 3) return;

   130

   131

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

   132

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

   133

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

   134

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

   135

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

   136

		DeleteAnimatedTile(tile);

   137

		return;

   138

	}

   139

   140

	if (!IsLiftMoving(tile)) {

   141

		int i;

   142

   143

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

   144

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

   145

		 *  the height of 2 'normal' floors.

   146

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

   147

		do {

   148

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

   149

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

   150

   151

		SetLiftDestination(tile, i);

   152

	}

   153

   154

	pos = GetLiftPosition(tile);

   155

	dest = GetLiftDestination(tile) * 6;

   156

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

   157

	SetLiftPosition(tile, pos);

   158

   159

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

   160

   161

	MarkTileDirtyByTile(tile);

   162

}

   163

   164

static void UpdateTownRadius(Town *t);

   165

   166

static bool IsCloseToTown(TileIndex tile, uint dist)

   167

{

   168

	const Town* t;

   169

   170

	FOR_ALL_TOWNS(t) {

   171

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

   172

	}

   173

	return false;

   174

}

   175

   176

static void MarkTownSignDirty(Town *t)

   177

{

   178

	MarkAllViewportsDirty(

   179

		t->sign.left-6,

   180

		t->sign.top-3,

   181

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

   182

		t->sign.top + 45

   183

	);

   184

}

   185

   186

void UpdateTownVirtCoord(Town *t)

   187

{

   188

	Point pt;

   189

   190

	MarkTownSignDirty(t);

   191

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

   192

	SetDParam(0, t->index);

   193

	SetDParam(1, t->population);

   194

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

   195

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   196

	MarkTownSignDirty(t);

   197

}

   198

   199

static void ChangePopulation(Town *t, int mod)

   200

{

   201

	t->population += mod;

   202

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   203

	UpdateTownVirtCoord(t);

   204

   205

	if (_town_sort_order & 2) _town_sort_dirty = true;

   206

}

   207

   208

uint32 GetWorldPopulation(void)

   209

{

   210

	uint32 pop;

   211

	const Town* t;

   212

   213

	pop = 0;

   214

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

   215

	return pop;

   216

}

   217

   218

static void MakeSingleHouseBigger(TileIndex tile)

   219

{

   220

	assert(IsTileType(tile, MP_HOUSE));

   221

   222

	if (LiftHasDestination(tile)) return;

   223

   224

	IncHouseConstructionTick(tile);

   225

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

   226

   227

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

   228

   229

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   230

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

   231

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

   232

	}

   233

	MarkTileDirtyByTile(tile);

   234

}

   235

   236

static void MakeTownHouseBigger(TileIndex tile)

   237

{

   238

	uint flags = _house_more_flags[GetHouseType(tile)];

   239

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

   240

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

   241

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

   242

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

   243

}

   244

   245

static void TileLoop_Town(TileIndex tile)

   246

{

   247

	int house;

   248

	Town *t;

   249

	uint32 r;

   250

   251

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   252

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

   253

		MakeTownHouseBigger(tile);

   254

		return;

   255

	}

   256

   257

	house = GetHouseType(tile);

   258

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

   259

   260

	t = GetTownByTile(tile);

   261

   262

	r = Random();

   263

   264

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

   265

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

   266

		uint moved;

   267

   268

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

   269

		t->new_max_pass += amt;

   270

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

   271

		t->new_act_pass += moved;

   272

	}

   273

   274

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

   275

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

   276

		uint moved;

   277

   278

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

   279

		t->new_max_mail += amt;

   280

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

   281

		t->new_act_mail += moved;

   282

	}

   283

   284

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

   285

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

   286

   287

		_current_player = OWNER_TOWN;

   288

   289

		ClearTownHouse(t, tile);

   290

   291

		// rebuild with another house?

   292

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

   293

   294

		_current_player = OWNER_NONE;

   295

	}

   296

}

   297

   298

static void ClickTile_Town(TileIndex tile)

   299

{

   300

	/* not used */

   301

}

   302

   303

static int32 ClearTile_Town(TileIndex tile, byte flags)

   304

{

   305

	int house, rating;

   306

	int32 cost;

   307

	Town *t;

   308

   309

	// safety checks

   310

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   311

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

   312

   313

	house = GetHouseType(tile);

   314

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

   315

   316

	rating = _housetype_remove_ratingmod[house];

   317

	_cleared_town_rating += rating;

   318

	_cleared_town = t = GetTownByTile(tile);

   319

   320

	if (_current_player < MAX_PLAYERS) {

   321

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

   322

			SetDParam(0, t->index);

   323

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   324

		}

   325

	}

   326

   327

	if (flags & DC_EXEC) {

   328

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   329

		ClearTownHouse(t, tile);

   330

	}

   331

   332

	return cost;

   333

}

   334

   335

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   336

{

   337

	byte type = GetHouseType(tile);

   338

   339

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   340

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   341

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   342

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   343

}

   344

   345

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   346

{

   347

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

   348

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   349

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

   350

		td->str = STR_2058_UNDER_CONSTRUCTION;

   351

	}

   352

   353

	td->owner = OWNER_TOWN;

   354

}

   355

   356

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   357

{

   358

	/* not used */

   359

	return 0;

   360

}

   361

   362

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

   363

{

   364

	/* not used */

   365

}

   366

   367

   368

static const TileIndexDiffC _roadblock_tileadd[] = {

   369

	{ 0, -1},

   370

	{ 1,  0},

   371

	{ 0,  1},

   372

	{-1,  0},

   373

   374

	// Store the first 3 elements again.

   375

	// Lets us rotate without using &3.

   376

	{ 0, -1},

   377

	{ 1,  0},

   378

	{ 0,  1}

   379

};

   380

   381

   382

static bool GrowTown(Town *t);

   383

   384

static void TownTickHandler(Town *t)

   385

{

   386

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

   387

		int i = t->grow_counter - 1;

   388

		if (i < 0) {

   389

			if (GrowTown(t)) {

   390

				i = t->growth_rate;

   391

			} else {

   392

				i = 0;

   393

			}

   394

		}

   395

		t->grow_counter = i;

   396

	}

   397

   398

	UpdateTownRadius(t);

   399

}

   400

   401

void OnTick_Town(void)

   402

{

   403

	if (_game_mode == GM_EDITOR) return;

   404

   405

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

   406

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

   407

	for (_cur_town_iter += GetTownPoolSize();

   408

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   409

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   410

		uint32 i = _cur_town_ctr;

   411

		Town *t;

   412

   413

		if (++_cur_town_ctr >= GetTownPoolSize())

   414

			_cur_town_ctr = 0;

   415

   416

		t = GetTown(i);

   417

   418

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

   419

	}

   420

}

   421

   422

static RoadBits GetTownRoadMask(TileIndex tile)

   423

{

   424

	TrackBits b = GetAnyRoadTrackBits(tile);

   425

	RoadBits r = 0;

   426

   427

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   428

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   429

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

   430

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

   431

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

   432

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

   433

	return r;

   434

}

   435

   436

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   437

{

   438

	Slope k;

   439

	Slope slope;

   440

   441

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

   442

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

   443

	TILE_ASSERT(tile);

   444

   445

	for (;;) {

   446

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

   447

		if (GetAnyRoadTrackBits(tile) == 0) {

   448

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

   449

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

   450

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

   451

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

   452

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

   453

				return false;

   454

		}

   455

   456

		slope = GetTileSlope(tile, NULL);

   457

		if (slope == SLOPE_FLAT) {

   458

no_slope:

   459

			// Tile has no slope

   460

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

   461

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

   462

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

   463

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

   464

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

   465

				return false;

   466

   467

			// Otherwise allow

   468

			return true;

   469

		}

   470

   471

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

   472

		// maybe terraform some.

   473

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

   474

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

   475

			uint32 r = Random();

   476

   477

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

   478

				int32 res;

   479

   480

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

   481

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

   482

					                      CMD_TERRAFORM_LAND);

   483

				} else {

   484

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

   485

					                      CMD_TERRAFORM_LAND);

   486

				}

   487

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

   488

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

   489

					goto no_slope;

   490

				}

   491

			}

   492

			return false;

   493

		}

   494

		return true;

   495

	}