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

	byte z;

    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

	z = ti->z;

    88

    89

	/* Add bricks below the house? */

    90

	if (ti->tileh != SLOPE_FLAT) {

    91

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

    92

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

    93

		z += TILE_HEIGHT;

    94

	} else {

    95

		/* Else draw regular ground */

    96

		DrawGroundSprite(dcts->ground);

    97

	}

    98

    99

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

   100

	image = dcts->building;

   101

	if (image != 0) {

   102

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

   103

   104

		AddSortableSpriteToDraw(image,

   105

			ti->x + dcts->subtile_x,

   106

			ti->y + dcts->subtile_y,

   107

			dcts->width + 1,

   108

			dcts->height + 1,

   109

			dcts->dz,

   110

			z);

   111

   112

		if (_display_opt & DO_TRANS_BUILDINGS) return;

   113

	}

   114

   115

	{

   116

		int proc = dcts->draw_proc - 1;

   117

   118

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

   119

	}

   120

}

   121

   122

static uint GetSlopeZ_Town(const TileInfo* ti)

   123

{

   124

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

   125

}

   126

   127

static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)

   128

{

   129

	return SLOPE_FLAT;

   130

}

   131

   132

static void AnimateTile_Town(TileIndex tile)

   133

{

   134

	int pos, dest;

   135

   136

	if (_tick_counter & 3) return;

   137

   138

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

   139

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

   140

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

   141

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

   142

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

   143

		DeleteAnimatedTile(tile);

   144

		return;

   145

	}

   146

   147

	if (!IsLiftMoving(tile)) {

   148

		int i;

   149

   150

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

   151

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

   152

		 *  the height of 2 'normal' floors.

   153

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

   154

		do {

   155

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

   156

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

   157

   158

		SetLiftDestination(tile, i);

   159

	}

   160

   161

	pos = GetLiftPosition(tile);

   162

	dest = GetLiftDestination(tile) * 6;

   163

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

   164

	SetLiftPosition(tile, pos);

   165

   166

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

   167

   168

	MarkTileDirtyByTile(tile);

   169

}

   170

   171

static void UpdateTownRadius(Town *t);

   172

   173

static bool IsCloseToTown(TileIndex tile, uint dist)

   174

{

   175

	const Town* t;

   176

   177

	FOR_ALL_TOWNS(t) {

   178

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

   179

	}

   180

	return false;

   181

}

   182

   183

static void MarkTownSignDirty(Town *t)

   184

{

   185

	MarkAllViewportsDirty(

   186

		t->sign.left-6,

   187

		t->sign.top-3,

   188

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

   189

		t->sign.top + 45

   190

	);

   191

}

   192

   193

void UpdateTownVirtCoord(Town *t)

   194

{

   195

	Point pt;

   196

   197

	MarkTownSignDirty(t);

   198

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

   199

	SetDParam(0, t->index);

   200

	SetDParam(1, t->population);

   201

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

   202

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   203

	MarkTownSignDirty(t);

   204

}

   205

   206

static void ChangePopulation(Town *t, int mod)

   207

{

   208

	t->population += mod;

   209

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   210

	UpdateTownVirtCoord(t);

   211

   212

	if (_town_sort_order & 2) _town_sort_dirty = true;

   213

}

   214

   215

uint32 GetWorldPopulation(void)

   216

{

   217

	uint32 pop;

   218

	const Town* t;

   219

   220

	pop = 0;

   221

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

   222

	return pop;

   223

}

   224

   225

static void MakeSingleHouseBigger(TileIndex tile)

   226

{

   227

	assert(IsTileType(tile, MP_HOUSE));

   228

   229

	if (LiftHasDestination(tile)) return;

   230

   231

	IncHouseConstructionTick(tile);

   232

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

   233

   234

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

   235

   236

	if (GetHouseBuildingStage(tile) == TOWN_HOUSE_COMPLETED){

   237

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

   238

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

   239

	}

   240

	MarkTileDirtyByTile(tile);

   241

}

   242

   243

static void MakeTownHouseBigger(TileIndex tile)

   244

{

   245

	uint flags = _house_more_flags[GetHouseType(tile)];

   246

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

   247

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

   248

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

   249

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

   250

}

   251

   252

static void TileLoop_Town(TileIndex tile)

   253

{

   254

	int house;

   255

	Town *t;

   256

	uint32 r;

   257

   258

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   259

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

   260

		MakeTownHouseBigger(tile);

   261

		return;

   262

	}

   263

   264

	house = GetHouseType(tile);

   265

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

   266

   267

	t = GetTownByTile(tile);

   268

   269

	r = Random();

   270

   271

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

   272

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

   273

		uint moved;

   274

   275

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

   276

		t->new_max_pass += amt;

   277

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

   278

		t->new_act_pass += moved;

   279

	}

   280

   281

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

   282

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

   283

		uint moved;

   284

   285

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

   286

		t->new_max_mail += amt;

   287

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

   288

		t->new_act_mail += moved;

   289

	}

   290

   291

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

   292

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

   293

   294

		_current_player = OWNER_TOWN;

   295

   296

		ClearTownHouse(t, tile);

   297

   298

		// rebuild with another house?

   299

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

   300

   301

		_current_player = OWNER_NONE;

   302

	}

   303

}

   304

   305

static void ClickTile_Town(TileIndex tile)

   306

{

   307

	/* not used */

   308

}

   309

   310

static int32 ClearTile_Town(TileIndex tile, byte flags)

   311

{

   312

	int house, rating;

   313

	int32 cost;

   314

	Town *t;

   315

   316

	// safety checks

   317

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   318

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

   319

   320

	house = GetHouseType(tile);

   321

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

   322

   323

	rating = _housetype_remove_ratingmod[house];

   324

	_cleared_town_rating += rating;

   325

	_cleared_town = t = GetTownByTile(tile);

   326

   327

	if (_current_player < MAX_PLAYERS) {

   328

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

   329

			SetDParam(0, t->index);

   330

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   331

		}

   332

	}

   333

   334

	if (flags & DC_EXEC) {

   335

		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);

   336

		ClearTownHouse(t, tile);

   337

	}

   338

   339

	return cost;

   340

}

   341

   342

static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)

   343

{

   344

	byte type = GetHouseType(tile);

   345

   346

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   347

	ac[CT_MAIL]       = _housetype_cargo_mail[type];

   348

	ac[CT_GOODS]      = _housetype_cargo_goods[type];

   349

	ac[CT_FOOD]       = _housetype_cargo_food[type];

   350

}

   351

   352

static void GetTileDesc_Town(TileIndex tile, TileDesc *td)

   353

{

   354

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

   355

	if (GetHouseBuildingStage(tile) != TOWN_HOUSE_COMPLETED) {

   356

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

   357

		td->str = STR_2058_UNDER_CONSTRUCTION;

   358

	}

   359

   360

	td->owner = OWNER_TOWN;

   361

}

   362

   363

static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)

   364

{

   365

	/* not used */

   366

	return 0;

   367

}

   368

   369

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

   370

{

   371

	/* not used */

   372

}

   373

   374

   375

static const TileIndexDiffC _roadblock_tileadd[] = {

   376

	{ 0, -1},

   377

	{ 1,  0},

   378

	{ 0,  1},

   379

	{-1,  0},

   380

   381

	// Store the first 3 elements again.

   382

	// Lets us rotate without using &3.

   383

	{ 0, -1},

   384

	{ 1,  0},

   385

	{ 0,  1}

   386

};

   387

   388

   389

static bool GrowTown(Town *t);

   390

   391

static void TownTickHandler(Town *t)

   392

{

   393

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

   394

		int i = t->grow_counter - 1;

   395

		if (i < 0) {

   396

			if (GrowTown(t)) {

   397

				i = t->growth_rate;

   398

			} else {

   399

				i = 0;

   400

			}

   401

		}

   402

		t->grow_counter = i;

   403

	}

   404

   405

	UpdateTownRadius(t);

   406

}

   407

   408

void OnTick_Town(void)

   409

{

   410

	if (_game_mode == GM_EDITOR) return;

   411

   412

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

   413

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

   414

	for (_cur_town_iter += GetTownPoolSize();

   415

	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;

   416

	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {

   417

		uint32 i = _cur_town_ctr;

   418

		Town *t;

   419

   420

		if (++_cur_town_ctr >= GetTownPoolSize())

   421

			_cur_town_ctr = 0;

   422

   423

		t = GetTown(i);

   424

   425

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

   426

	}

   427

}

   428

   429

static RoadBits GetTownRoadMask(TileIndex tile)

   430

{

   431

	TrackBits b = GetAnyRoadTrackBits(tile);

   432

	RoadBits r = 0;

   433

   434

	if (b & TRACK_BIT_X)     r |= ROAD_X;

   435

	if (b & TRACK_BIT_Y)     r |= ROAD_Y;

   436

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

   437

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

   438

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

   439

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

   440

	return r;

   441

}

   442

   443

static bool IsRoadAllowedHere(TileIndex tile, int dir)

   444

{

   445

	Slope k;

   446

	Slope slope;

   447

   448

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

   449

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

   450

	TILE_ASSERT(tile);

   451

   452

	for (;;) {

   453

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

   454

		if (GetAnyRoadTrackBits(tile) == 0) {

   455

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

   456

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

   457

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

   458

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

   459

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

   460

				return false;

   461

		}

   462

   463

		slope = GetTileSlope(tile, NULL);

   464

		if (slope == SLOPE_FLAT) {

   465

no_slope:

   466

			// Tile has no slope

   467

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

   468

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

   469

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

   470

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

   471

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

   472

				return false;

   473

   474

			// Otherwise allow

   475

			return true;

   476

		}

   477

   478

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

   479

		// maybe terraform some.

   480

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

   481

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

   482

			uint32 r = Random();

   483

   484

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

   485

				int32 res;

   486

   487

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

   488

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

   489

					                      CMD_TERRAFORM_LAND);

   490

				} else {

   491

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

   492

					                      CMD_TERRAFORM_LAND);

   493

				}

   494

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

   495

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

   496