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 "table/town_land.h"

    30

    31

enum {

    32

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

    33

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

    34

	TOWN_POOL_MAX_BLOCKS      = 8000,

    35

};

    36

    37

/**

    38

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

    39

 */

    40

static void TownPoolNewBlock(uint start_item)

    41

{

    42

	Town *t;

    43

    44

	FOR_ALL_TOWNS_FROM(t, start_item)

    45

		t->index = start_item++;

    46

}

    47

    48

/* Initialize the town-pool */

    49

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

    50

    51

// Local

    52

static int _grow_town_result;

    53

    54

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

    55

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

    56

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

    57

    58

static void TownDrawHouseLift(const TileInfo *ti)

    59

{

    60

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

    61

}

    62

    63

typedef void TownDrawTileProc(const TileInfo *ti);

    64

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    65

	TownDrawHouseLift

    66

};

    67

    68

    69

static void DrawTile_Town(TileInfo *ti)

    70

{

    71

	const DrawBuildingsTileStruct *dcts;

    72

	uint32 image;

    73

    74

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

    75

	{

    76

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

    77

		uint variant;

    78

		variant  = ti->x >> 4;

    79

		variant ^= ti->x >> 6;

    80

		variant ^= ti->y >> 4;

    81

		variant -= ti->y >> 6;

    82

		variant &= 3;

    83

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

    84

	}

    85

    86

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

    87

	DrawGroundSprite(dcts->ground);

    88

    89

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

    90

	image = dcts->building;

    91

	if (image != 0) {

    92

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

    93

    94

		AddSortableSpriteToDraw(image,

    95

			ti->x + dcts->subtile_x,

    96

			ti->y + dcts->subtile_y,

    97

			dcts->width + 1,

    98

			dcts->height + 1,

    99

			dcts->dz,

   100

			ti->z

   101

		);

   102

   103

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   104

	}

   105

   106

	{

   107

		int proc = dcts->draw_proc - 1;

   108

   109

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

   110

	}

   111

}

   112

   113

static uint GetSlopeZ_Town(const TileInfo* ti)

   114

{

   115

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

   116

}

   117

   118

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   119

{

   120

	return SLOPE_FLAT;

   121

}

   122

   123

static void AnimateTile_Town(TileIndex tile)

   124

{

   125

	int pos, dest;

   126

   127

	if (_tick_counter & 3) return;

   128

   129

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

   130

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

   131

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

   132

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

   133

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

   134

		DeleteAnimatedTile(tile);

   135

		return;

   136

	}

   137

   138

	if (!IsLiftMoving(tile)) {

   139

		int i;

   140

   141

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

   142

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

   143

		 *  the height of 2 'normal' floors.

   144

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

   145

		do {

   146

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

   147

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

   148

   149

		SetLiftDestination(tile, i);

   150

	}

   151

   152

	pos = GetLiftPosition(tile);

   153

	dest = GetLiftDestination(tile) * 6;

   154

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

   155

	SetLiftPosition(tile, pos);

   156

   157

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

   158

   159

	MarkTileDirtyByTile(tile);

   160

}

   161

   162

static void UpdateTownRadius(Town *t);

   163

   164

static bool IsCloseToTown(TileIndex tile, uint dist)

   165

{

   166

	const Town* t;

   167

   168

	FOR_ALL_TOWNS(t) {

   169

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

   170

	}

   171

	return false;

   172

}

   173

   174

static void MarkTownSignDirty(Town *t)

   175

{

   176

	MarkAllViewportsDirty(

   177

		t->sign.left-6,

   178

		t->sign.top-3,

   179

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

   180

		t->sign.top + 45

   181

	);

   182

}

   183

   184

void UpdateTownVirtCoord(Town *t)

   185

{

   186

	Point pt;

   187

   188

	MarkTownSignDirty(t);

   189

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

   190

	SetDParam(0, t->index);

   191

	SetDParam(1, t->population);

   192

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

   193

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   194

	MarkTownSignDirty(t);

   195

}

   196

   197

static void ChangePopulation(Town *t, int mod)

   198

{

   199

	t->population += mod;

   200

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   201

	UpdateTownVirtCoord(t);

   202

   203

	if (_town_sort_order & 2) _town_sort_dirty = true;

   204

}

   205

   206

uint32 GetWorldPopulation(void)

   207

{

   208

	uint32 pop;

   209

	const Town* t;

   210

   211

	pop = 0;

   212

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

   213

	return pop;

   214

}

   215

   216

static void MakeSingleHouseBigger(TileIndex tile)

   217

{

   218

	assert(IsTileType(tile, MP_HOUSE));

   219

   220

	if (LiftHasDestination(tile)) return;

   221

   222

	IncHouseConstructionTick(tile);

   223

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

   224

   225

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

   226

   227

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   228

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

   229

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

   230

	}

   231

	MarkTileDirtyByTile(tile);

   232

}

   233

   234

static void MakeTownHouseBigger(TileIndex tile)

   235

{

   236

	uint flags = _house_more_flags[GetHouseType(tile)];

   237

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

   238

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

   239

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

   240

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

   241

}

   242

   243

static void TileLoop_Town(TileIndex tile)

   244

{

   245

	int house;

   246

	Town *t;

   247

	uint32 r;

   248

   249

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   250

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

   251

		MakeTownHouseBigger(tile);

   252

		return;

   253

	}

   254

   255

	house = GetHouseType(tile);

   256

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

   257

   258

	t = GetTownByTile(tile);

   259

   260

	r = Random();

   261

   262

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

   263

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

   264

		uint moved;

   265

   266

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

   267

		t->new_max_pass += amt;

   268

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

   269

		t->new_act_pass += moved;

   270

	}

   271

   272

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

   273

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

   274

		uint moved;

   275

   276

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

   277

		t->new_max_mail += amt;

   278

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

   279

		t->new_act_mail += moved;

   280

	}

   281

   282

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

   283

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

   284

   285

		_current_player = OWNER_TOWN;

   286

   287

		ClearTownHouse(t, tile);

   288

   289

		// rebuild with another house?

   290

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

   291

   292

		_current_player = OWNER_NONE;

   293

	}

   294

}

   295

   296

static void ClickTile_Town(TileIndex tile)

   297

{

   298

	/* not used */

   299

}

   300

   301

static int32 ClearTile_Town(TileIndex tile, byte flags)

   302

{

   303

	int house, rating;

   304

	int32 cost;

   305

	Town *t;

   306

   307

	// safety checks

   308

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   309

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

   310

   311

	house = GetHouseType(tile);

   312

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

   313

   314

	rating = _housetype_remove_ratingmod[house];

   315

	_cleared_town_rating += rating;

   316

	_cleared_town = t = GetTownByTile(tile);

   317

   318

	if (_current_player < MAX_PLAYERS) {

   319

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

   320

			SetDParam(0, t->index);

   321

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   322

		}

   323

	}

   324

   325

	if (flags & DC_EXEC) {

   326

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   327

		ClearTownHouse(t, tile);

   328

	}

   329

   330

	return cost;

   331

}

   332

   333

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   334

{

   335

	byte type = GetHouseType(tile);

   336

   337

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   338

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   339

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   340

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   341

}

   342

   343

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   344

{

   345

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

   346

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   347

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

   348

		td->str = STR_2058_UNDER_CONSTRUCTION;

   349

	}

   350

   351

	td->owner = OWNER_TOWN;

   352

}

   353

   354

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   355

{

   356

	/* not used */

   357

	return 0;

   358

}

   359

   360

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

   361

{

   362

	/* not used */

   363

}

   364

   365

   366

static const TileIndexDiffC _roadblock_tileadd[] = {

   367

	{ 0, -1},

   368

	{ 1,  0},

   369

	{ 0,  1},

   370

	{-1,  0},

   371

   372

	// Store the first 3 elements again.

   373

	// Lets us rotate without using &3.

   374

	{ 0, -1},

   375

	{ 1,  0},

   376

	{ 0,  1}

   377

};

   378

   379

   380

static bool GrowTown(Town *t);

   381

   382

static void TownTickHandler(Town *t)

   383

{

   384

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

   385

		int i = t->grow_counter - 1;

   386

		if (i < 0) {

   387

			if (GrowTown(t)) {

   388

				i = t->growth_rate;

   389

			} else {

   390

				i = 0;

   391

			}

   392

		}

   393

		t->grow_counter = i;

   394

	}

   395

   396

	UpdateTownRadius(t);

   397

}

   398

   399

void OnTick_Town(void)

   400

{

   401

	if (_game_mode == GM_EDITOR) return;

   402

   403

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

   404

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

   405

	for (_cur_town_iter += GetTownPoolSize();

   406

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   407

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   408

		uint32 i = _cur_town_ctr;

   409

		Town *t;

   410

   411

		if (++_cur_town_ctr >= GetTownPoolSize())

   412

			_cur_town_ctr = 0;

   413

   414

		t = GetTown(i);

   415

   416

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

   417

	}

   418

}

   419

   420

static RoadBits GetTownRoadMask(TileIndex tile)

   421

{

   422

	TrackBits b = GetAnyRoadTrackBits(tile);

   423

	RoadBits r = 0;

   424

   425

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   426

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   427

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

   428

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

   429

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

   430

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

   431

	return r;

   432

}

   433

   434

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   435

{

   436

	Slope k;

   437

	Slope slope;

   438

   439

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

   440

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

   441

	TILE_ASSERT(tile);

   442

   443

	for (;;) {

   444

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

   445

		if (GetAnyRoadTrackBits(tile) == 0) {

   446

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

   447

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

   448

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

   449

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

   450

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

   451

				return false;

   452

		}

   453

   454

		slope = GetTileSlope(tile, NULL);

   455

		if (slope == SLOPE_FLAT) {

   456

no_slope:

   457

			// Tile has no slope

   458

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

   459

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

   460

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

   461

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

   462

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

   463

				return false;

   464

   465

			// Otherwise allow

   466

			return true;

   467

		}

   468

   469

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

   470

		// maybe terraform some.

   471

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

   472

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

   473

			uint32 r = Random();

   474

   475

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

   476

				int32 res;

   477

   478

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

   479

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

   480

					                      CMD_TERRAFORM_LAND);

   481

				} else {

   482

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

   483

					                      CMD_TERRAFORM_LAND);

   484

				}

   485

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

   486

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

   487

					goto no_slope;

   488

				}

   489

			}

   490

			return false;

   491

		}

   492

		return true;

   493

	}

   494

}

   495