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 "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

	byte z;

    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

	z = ti->z;

    89

    90

	/* Add bricks below the house? */

    91

	if (ti->tileh != SLOPE_FLAT) {

    92

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

    93

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

    94

		z += TILE_HEIGHT;

    95

	} else {

    96

		/* Else draw regular ground */

    97

		DrawGroundSprite(dcts->ground);

    98

	}

    99

   100

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

   101

	image = dcts->building;

   102

	if (image != 0) {

   103

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   104

   105

		AddSortableSpriteToDraw(image,

   106

			ti->x + dcts->subtile_x,

   107

			ti->y + dcts->subtile_y,

   108

			dcts->width + 1,

   109

			dcts->height + 1,

   110

			dcts->dz,

   111

			z);

   112

   113

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   114

	}

   115

   116

	{

   117

		int proc = dcts->draw_proc - 1;

   118

   119

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

   120

	}

   121

}

   122

   123

static uint GetSlopeZ_Town(const TileInfo* ti)

   124

{

   125

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

   126

}

   127

   128

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   129

{

   130

	return SLOPE_FLAT;

   131

}

   132

   133

static void AnimateTile_Town(TileIndex tile)

   134

{

   135

	int pos, dest;

   136

   137

	if (_tick_counter & 3) return;

   138

   139

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

   140

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

   141

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

   142

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

   143

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

   144

		DeleteAnimatedTile(tile);

   145

		return;

   146

	}

   147

   148

	if (!IsLiftMoving(tile)) {

   149

		int i;

   150

   151

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

   152

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

   153

		 *  the height of 2 'normal' floors.

   154

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

   155

		do {

   156

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

   157

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

   158

   159

		SetLiftDestination(tile, i);

   160

	}

   161

   162

	pos = GetLiftPosition(tile);

   163

	dest = GetLiftDestination(tile) * 6;

   164

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

   165

	SetLiftPosition(tile, pos);

   166

   167

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

   168

   169

	MarkTileDirtyByTile(tile);

   170

}

   171

   172

static void UpdateTownRadius(Town *t);

   173

   174

static bool IsCloseToTown(TileIndex tile, uint dist)

   175

{

   176

	const Town* t;

   177

   178

	FOR_ALL_TOWNS(t) {

   179

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

   180

	}

   181

	return false;

   182

}

   183

   184

static void MarkTownSignDirty(Town *t)

   185

{

   186

	MarkAllViewportsDirty(

   187

		t->sign.left-6,

   188

		t->sign.top-3,

   189

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

   190

		t->sign.top + 45

   191

	);

   192

}

   193

   194

void UpdateTownVirtCoord(Town *t)

   195

{

   196

	Point pt;

   197

   198

	MarkTownSignDirty(t);

   199

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

   200

	SetDParam(0, t->index);

   201

	SetDParam(1, t->population);

   202

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

   203

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   204

	MarkTownSignDirty(t);

   205

}

   206

   207

static void ChangePopulation(Town *t, int mod)

   208

{

   209

	t->population += mod;

   210

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   211

	UpdateTownVirtCoord(t);

   212

   213

	if (_town_sort_order & 2) _town_sort_dirty = true;

   214

}

   215

   216

uint32 GetWorldPopulation(void)

   217

{

   218

	uint32 pop;

   219

	const Town* t;

   220

   221

	pop = 0;

   222

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

   223

	return pop;

   224

}

   225

   226

static void MakeSingleHouseBigger(TileIndex tile)

   227

{

   228

	assert(IsTileType(tile, MP_HOUSE));

   229

   230

	if (LiftHasDestination(tile)) return;

   231

   232

	IncHouseConstructionTick(tile);

   233

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

   234

   235

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

   236

   237

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   238

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

   239

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

   240

	}

   241

	MarkTileDirtyByTile(tile);

   242

}

   243

   244

static void MakeTownHouseBigger(TileIndex tile)

   245

{

   246

	uint flags = _house_more_flags[GetHouseType(tile)];

   247

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

   248

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

   249

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

   250

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

   251

}

   252

   253

static void TileLoop_Town(TileIndex tile)

   254

{

   255

	int house;

   256

	Town *t;

   257

	uint32 r;

   258

   259

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   260

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

   261

		MakeTownHouseBigger(tile);

   262

		return;

   263

	}

   264

   265

	house = GetHouseType(tile);

   266

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

   267

   268

	t = GetTownByTile(tile);

   269

   270

	r = Random();

   271

   272

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

   273

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

   274

		uint moved;

   275

   276

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

   277

		t->new_max_pass += amt;

   278

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

   279

		t->new_act_pass += moved;

   280

	}

   281

   282

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

   283

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

   284

		uint moved;

   285

   286

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

   287

		t->new_max_mail += amt;

   288

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

   289

		t->new_act_mail += moved;

   290

	}

   291

   292

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

   293

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

   294

   295

		_current_player = OWNER_TOWN;

   296

   297

		ClearTownHouse(t, tile);

   298

   299

		// rebuild with another house?

   300

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

   301

   302

		_current_player = OWNER_NONE;

   303

	}

   304

}

   305

   306

static void ClickTile_Town(TileIndex tile)

   307

{

   308

	/* not used */

   309

}

   310

   311

static int32 ClearTile_Town(TileIndex tile, byte flags)

   312

{

   313

	int house, rating;

   314

	int32 cost;

   315

	Town *t;

   316

   317

	// safety checks

   318

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   319

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

   320

   321

	house = GetHouseType(tile);

   322

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

   323

   324

	rating = _housetype_remove_ratingmod[house];

   325

	_cleared_town_rating += rating;

   326

	_cleared_town = t = GetTownByTile(tile);

   327

   328

	if (_current_player < MAX_PLAYERS) {

   329

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

   330

			SetDParam(0, t->index);

   331

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   332

		}

   333

	}

   334

   335

	if (flags & DC_EXEC) {

   336

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   337

		ClearTownHouse(t, tile);

   338

	}

   339

   340

	return cost;

   341

}

   342

   343

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   344

{

   345

	byte type = GetHouseType(tile);

   346

   347

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   348

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   349

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   350

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   351

}

   352

   353

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   354

{

   355

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

   356

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   357

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

   358

		td->str = STR_2058_UNDER_CONSTRUCTION;

   359

	}

   360

   361

	td->owner = OWNER_TOWN;

   362

}

   363

   364

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   365

{

   366

	/* not used */

   367

	return 0;

   368

}

   369

   370

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

   371

{

   372

	/* not used */

   373

}

   374

   375

   376

static const TileIndexDiffC _roadblock_tileadd[] = {

   377

	{ 0, -1},

   378

	{ 1,  0},

   379

	{ 0,  1},

   380

	{-1,  0},

   381

   382

	// Store the first 3 elements again.

   383

	// Lets us rotate without using &3.

   384

	{ 0, -1},

   385

	{ 1,  0},

   386

	{ 0,  1}

   387

};

   388

   389

   390

static bool GrowTown(Town *t);

   391

   392

static void TownTickHandler(Town *t)

   393

{

   394

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

   395

		int i = t->grow_counter - 1;

   396

		if (i < 0) {

   397

			if (GrowTown(t)) {

   398

				i = t->growth_rate;

   399

			} else {

   400

				i = 0;

   401

			}

   402

		}

   403

		t->grow_counter = i;

   404

	}

   405

   406

	UpdateTownRadius(t);

   407

}

   408

   409

void OnTick_Town(void)

   410

{

   411

	if (_game_mode == GM_EDITOR) return;

   412

   413

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

   414

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

   415

	for (_cur_town_iter += GetTownPoolSize();

   416

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   417

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   418

		uint32 i = _cur_town_ctr;

   419

		Town *t;

   420

   421

		if (++_cur_town_ctr >= GetTownPoolSize())

   422

			_cur_town_ctr = 0;

   423

   424

		t = GetTown(i);

   425

   426

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

   427

	}

   428

}

   429

   430

static RoadBits GetTownRoadMask(TileIndex tile)

   431

{

   432

	TrackBits b = GetAnyRoadTrackBits(tile);

   433

	RoadBits r = 0;

   434

   435

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   436

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   437

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

   438

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

   439

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

   440

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

   441

	return r;

   442

}

   443

   444

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   445

{

   446

	Slope k;

   447

	Slope slope;

   448

   449

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

   450

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

   451

	TILE_ASSERT(tile);

   452

   453

	for (;;) {

   454

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

   455

		if (GetAnyRoadTrackBits(tile) == 0) {

   456

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

   457

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

   458

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

   459

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

   460

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

   461

				return false;

   462

		}

   463

   464

		slope = GetTileSlope(tile, NULL);

   465

		if (slope == SLOPE_FLAT) {

   466

no_slope:

   467

			// Tile has no slope

   468

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

   469

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

   470

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

   471

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

   472

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

   473

				return false;

   474

   475

			// Otherwise allow

   476

			return true;

   477

		}

   478

   479

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

   480

		// maybe terraform some.

   481

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

   482

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

   483

			uint32 r = Random();

   484

   485

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

   486

				int32 res;

   487

   488

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

   489

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

   490

					                      CMD_TERRAFORM_LAND);

   491

				} else {

   492

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

   493

					                      CMD_TERRAFORM_LAND);

   494

				}

   495

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