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/* $Id$ */

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     3

/** @file town_cmd.cpp */

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#include "stdafx.h"

     6

#include "openttd.h"

     7

#include "functions.h"

     8

#include "debug.h"

     9

#include "strings.h"

    10

#include "road_map.h"

    11

#include "table/strings.h"

    12

#include "table/sprites.h"

    13

#include "map.h"

    14

#include "landscape.h"

    15

#include "tile.h"

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#include "town_map.h"

    17

#include "tunnel_map.h"

    18

#include "viewport.h"

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#include "town.h"

    20

#include "command.h"

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#include "gfx.h"

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#include "industry.h"

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#include "station.h"

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#include "vehicle.h"

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#include "player.h"

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#include "news.h"

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#include "saveload.h"

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#include "economy.h"

    29

#include "gui.h"

    30

#include "unmovable_map.h"

    31

#include "water_map.h"

    32

#include "variables.h"

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#include "bridge.h"

    34

#include "bridge_map.h"

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#include "date.h"

    36

#include "table/town_land.h"

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#include "genworld.h"

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#include "newgrf.h"

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#include "newgrf_callbacks.h"

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#include "newgrf_house.h"

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#include "newgrf_commons.h"

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#include "newgrf_townname.h"

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#include "misc/autoptr.hpp"

    44

    45

/* Initialize the town-pool */

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DEFINE_OLD_POOL_GENERIC(Town, Town)

    47

    48

Town::Town(TileIndex tile)

    49

{

    50

	if (tile != 0) _total_towns++;

    51

	this->xy = tile;

    52

}

    53

    54

Town::~Town()

    55

{

    60

	Industry *i;

    61

    62

	/* Delete town authority window

    63

	 * and remove from list of sorted towns */

    64

	DeleteWindowById(WC_TOWN_VIEW, this->index);

    65

	_town_sort_dirty = true;

    66

	_total_towns--;

    67

    68

	/* Delete all industries belonging to the town */

    69

	FOR_ALL_INDUSTRIES(i) if (i->town == this) delete i;

    70

    71

	/* Go through all tiles and delete those belonging to the town */

    72

	for (TileIndex tile = 0; tile < MapSize(); ++tile) {

    73

		switch (GetTileType(tile)) {

    74

			case MP_HOUSE:

    75

				if (GetTownByTile(tile) == this) DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

    76

				break;

    77

    78

			case MP_ROAD:

    79

			case MP_TUNNELBRIDGE:

    80

				if (IsTileOwner(tile, OWNER_TOWN) &&

    81

						ClosestTownFromTile(tile, (uint)-1) == this)

    82

					DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

    83

				break;

    84

    85

			default:

    86

				break;

    87

		}

    88

	}

    89

    90

	DeleteSubsidyWithTown(this->index);

    91

    92

	MarkWholeScreenDirty();

    93

    94

	this->xy = 0;

    95

}

    96

    97

// Local

    98

static int _grow_town_result;

    99

   100

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

   101

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

   102

   103

static void TownDrawHouseLift(const TileInfo *ti)

   104

{

   105

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

   106

}

   107

   108

typedef void TownDrawTileProc(const TileInfo *ti);

   109

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

   110

	TownDrawHouseLift

   111

};

   112

   113

uint OriginalTileRandomiser(uint x, uint y)

   114

{

   115

	uint variant;

   116

	variant  = x >> 4;

   117

	variant ^= x >> 6;

   118

	variant ^= y >> 4;

   119

	variant -= y >> 6;

   120

	variant &= 3;

   121

	return variant;

   122

}

   123

   124

/**

   125

 * House Tile drawing handler.

   126

 * Part of the tile loop process

   127

 * @param ti TileInfo of the tile to draw

   128

 */

   129

static void DrawTile_Town(TileInfo *ti)

   130

{

   131

	const DrawBuildingsTileStruct *dcts;

   132

	SpriteID image;

   133

	SpriteID pal;

   134

	HouseID house_id = GetHouseType(ti->tile);

   135

   136

	if (house_id >= NEW_HOUSE_OFFSET) {

   137

		/* Houses don't necessarily need new graphics. If they don't have a

   138

		 * spritegroup associated with them, then the sprite for the substitute

   139

		 * house id is drawn instead. */

   140

		if (GetHouseSpecs(house_id)->spritegroup != NULL) {

   141

			DrawNewHouseTile(ti, house_id);

   142

			return;

   143

		} else {

   144

			house_id = GetHouseSpecs(house_id)->substitute_id;

   145

		}

   146

	}

   147

   148

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

   149

	dcts = &_town_draw_tile_data[house_id << 4 | OriginalTileRandomiser(ti->x, ti->y) << 2 | GetHouseBuildingStage(ti->tile)];

   150

   151

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

   152

   153

	image = dcts->ground.sprite;

   154

	pal   = dcts->ground.pal;

   155

	DrawGroundSprite(image, pal);

   156

   157

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

   158

	image = dcts->building.sprite;

   159

	if (image != 0) {

   160

		AddSortableSpriteToDraw(image, dcts->building.pal,

   161

			ti->x + dcts->subtile_x,

   162

			ti->y + dcts->subtile_y,

   163

			dcts->width + 1,

   164

			dcts->height + 1,

   165

			dcts->dz,

   166

			ti->z,

   167

			HASBIT(_transparent_opt, TO_HOUSES)

   168

		);

   169

   170

		if (HASBIT(_transparent_opt, TO_HOUSES)) return;

   171

	}

   172

   173

	{

   174

		int proc = dcts->draw_proc - 1;

   175

   176

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

   177

	}

   178

}

   179

   180

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

   181

{

   182

	return GetTileMaxZ(tile);

   183

}

   184

   185

static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)

   186

{

   187

	return FlatteningFoundation(tileh);

   188

}

   189

   190

/**

   191

 * Animate a tile for a town

   192

 * Only certain houses can be animated

   193

 * The newhouses animation superseeds regular ones

   194

 * @param tile TileIndex of the house to animate

   195

 */

   196

static void AnimateTile_Town(TileIndex tile)

   197

{

   198

	int pos, dest;

   199

   200

	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {

   201

		AnimateNewHouseTile(tile);

   202

		return;

   203

	}

   204

   205

	if (_tick_counter & 3) return;

   206

   207

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

   208

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

   209

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

   210

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

   211

	if (!(GetHouseSpecs(GetHouseType(tile))->building_flags & BUILDING_IS_ANIMATED)) {

   212

		DeleteAnimatedTile(tile);

   213

		return;

   214

	}

   215

   216

	if (!LiftHasDestination(tile)) {

   217

		int i;

   218

   219

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

   220

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

   221

		 *  the height of 2 'normal' floors.

   222

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

   223

		do {

   224

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

   225

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

   226

   227

		SetLiftDestination(tile, i);

   228

	}

   229

   230

	pos = GetLiftPosition(tile);

   231

	dest = GetLiftDestination(tile) * 6;

   232

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

   233

	SetLiftPosition(tile, pos);

   234

   235

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

   236

   237

	MarkTileDirtyByTile(tile);

   238

}

   239

   240

static void UpdateTownRadius(Town *t);

   241

   242

/**

   243

 * Determines if a town is close to a tile

   244

 * @param tile TileIndex of the tile to query

   245

 * @param dist maximum distance to be accepted

   246

 * @returns true if the tile correspond to the distance criteria

   247

 */

   248

static bool IsCloseToTown(TileIndex tile, uint dist)

   249

{

   250

	const Town* t;

   251

   252

	FOR_ALL_TOWNS(t) {

   253

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

   254

	}

   255

	return false;

   256

}

   257

   258

/**

   259

 * Marks the town sign as needing a repaint

   260

 * @param t Town requesting repaint

   261

 */

   262

static void MarkTownSignDirty(Town *t)

   263

{

   264

	MarkAllViewportsDirty(

   265

		t->sign.left - 6,

   266

		t->sign.top - 3,

   267

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

   268

		t->sign.top + 45

   269

	);

   270

}

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   272

/**

   273

 * Resize the sign(label) of the town after changes in

   274

 * population (creation or growth or else)

   275

 * @param t Town to update

   276

 */

   277

void UpdateTownVirtCoord(Town *t)

   278

{

   279

	Point pt;

   280

   281

	MarkTownSignDirty(t);

   282

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

   283

	SetDParam(0, t->index);

   284

	SetDParam(1, t->population);

   285

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

   286

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   287

	MarkTownSignDirty(t);

   288

}

   289

   290

/**

   291

 * Change the towns population

   292

 * @param t Town which polulation has changed

   293

 * @param mod polulation change (can be positive or negative)

   294

 */

   295

static void ChangePopulation(Town *t, int mod)

   296

{

   297

	t->population += mod;

   298

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   299

	UpdateTownVirtCoord(t);

   300

   301

	if (_town_sort_order & 2) _town_sort_dirty = true;

   302

}

   303

   304

/**

   305

 * Determines the world population

   306

 * Basically, count population of all towns, one by one

   307

 * @return uint32 the calculated population of the world

   308

 */

   309

uint32 GetWorldPopulation()

   310

{

   311

	uint32 pop;

   312

	const Town* t;

   313

   314

	pop = 0;

   315

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

   316

	return pop;

   317

}

   318

   319

/**

   320

 * Helper function for house completion stages progression

   321

 * @param tile TileIndex of the house (or parts of it) to "grow"

   322

 */

   323

static void MakeSingleHouseBigger(TileIndex tile)

   324

{

   325

	assert(IsTileType(tile, MP_HOUSE));

   326

   327

	/* means it is completed, get out. */

   328

	if (LiftHasDestination(tile)) return;

   329

   330

	/* progress in construction stages */

   331

	IncHouseConstructionTick(tile);

   332

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

   333

   334

	/* Check and/or  */

   335

	if (HASBIT(GetHouseSpecs(GetHouseType(tile))->callback_mask, CBM_CONSTRUCTION_STATE_CHANGE)) {

   336

		uint16 callback_res = GetHouseCallback(CBID_HOUSE_CONSTRUCTION_STATE_CHANGE, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);

   337

		if (callback_res != CALLBACK_FAILED) ChangeHouseAnimationFrame(tile, callback_res);

   338

	}

   339

   340

	if (IsHouseCompleted(tile)) {

   341

		/* Now that construction is complete, we can add the population of the

   342

		 * building to the town. */

   343

		ChangePopulation(GetTownByTile(tile), GetHouseSpecs(GetHouseType(tile))->population);

   344

	}

   345

	MarkTileDirtyByTile(tile);

   346

}

   347

   348

/** Make the house advances in its construction stages until completion

   349

 * @param tile TileIndex of house

   350

 */

   351

static void MakeTownHouseBigger(TileIndex tile)

   352

{

   353

	uint flags = GetHouseSpecs(GetHouseType(tile))->building_flags;

   354

	if (flags & BUILDING_HAS_1_TILE)  MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 0));

   355

	if (flags & BUILDING_2_TILES_Y)   MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 1));

   356

	if (flags & BUILDING_2_TILES_X)   MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 0));

   357

	if (flags & BUILDING_HAS_4_TILES) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 1));

   358

}

   359

   360

/**

   361

 * Periodic tic handler for houses and town

   362

 * @param tile been asked to do its stuff

   363

 */

   364

static void TileLoop_Town(TileIndex tile)

   365

{

   366

	Town *t;

   367

	uint32 r;

   368

	HouseID house_id = GetHouseType(tile);

   369

	HouseSpec *hs = GetHouseSpecs(house_id);

   370

   371

	/* NewHouseTileLoop returns false if Callback 21 succeeded, i.e. the house

   372

	 * doesn't exist any more, so don't continue here. */

   373

	if (house_id >= NEW_HOUSE_OFFSET && !NewHouseTileLoop(tile)) return;

   374

   375

	if (!IsHouseCompleted(tile)) {

   376

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

   377

		MakeTownHouseBigger(tile);

   378

		return;

   379

	}

   380

   381

	/* If the lift has a destination, it is already an animated tile. */

   382

	if ((hs->building_flags & BUILDING_IS_ANIMATED) &&

   383

			house_id < NEW_HOUSE_OFFSET &&

   384

			!LiftHasDestination(tile) &&

   385

			CHANCE16(1, 2))

   386

		AddAnimatedTile(tile);

   387

   388

	t = GetTownByTile(tile);

   389

   390

	r = Random();

   391

   392

	if (HASBIT(hs->callback_mask, CBM_HOUSE_PRODUCE_CARGO)) {

   393

		for (uint i = 0; i < 256; i++) {

   394

			uint16 callback = GetHouseCallback(CBID_HOUSE_PRODUCE_CARGO, i, r, house_id, t, tile);

   395

   396

			if (callback == CALLBACK_FAILED) break;

   397

			if (callback == 0x20FF) break;

   398

   399

			CargoID cargo = GetCargoTranslation(GB(callback, 8, 7), hs->grffile);

   400

			if (cargo == CT_INVALID) continue;

   401

   402

			uint amt = GB(callback, 0, 8);

   403

			uint moved = MoveGoodsToStation(tile, 1, 1, cargo, amt);

   404

   405

			const CargoSpec *cs = GetCargo(cargo);

   406

			switch (cs->town_effect) {

   407

				case TE_PASSENGERS:

   408

					t->new_max_pass += amt;

   409

					t->new_act_pass += moved;

   410

					break;

   411

   412

				case TE_MAIL:

   413

					t->new_max_mail += amt;

   414

					t->new_act_mail += moved;

   415

					break;

   416

   417

				default:

   418

					break;

   419

			}

   420

		}

   421

	} else {

   422

		if (GB(r, 0, 8) < hs->population) {

   423

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

   424

			uint moved;

   425

   426

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

   427

			t->new_max_pass += amt;

   428

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

   429

			t->new_act_pass += moved;

   430

		}

   431

   432

		if (GB(r, 8, 8) < hs->mail_generation) {

   433

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

   434

			uint moved;

   435

   436

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

   437

			t->new_max_mail += amt;

   438

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

   439

			t->new_act_mail += moved;

   440

		}

   441

	}

   442

   443

	_current_player = OWNER_TOWN;

   444

   445

	if (hs->building_flags & BUILDING_HAS_1_TILE &&

   446

			HASBIT(t->flags12, TOWN_IS_FUNDED) &&

   447

			CanDeleteHouse(tile) &&

   448

			max(_cur_year - GetHouseConstructionYear(tile), 0) >= hs->minimum_life &&

   449

			--t->time_until_rebuild == 0) {

   450

		t->time_until_rebuild = GB(r, 16, 8) + 192;

   451

   452

		ClearTownHouse(t, tile);

   453

   454

		/* Rebuild with another house? */

   455

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

   456

	}

   457

   458

	_current_player = OWNER_NONE;

   459

}

   460

   461

/**

   462

 * Unused handler

   463

 * @param tile unused

   464

 */

   465

static void ClickTile_Town(TileIndex tile)

   466

{

   467

	/* not used */

   468

}

   469

   470

static CommandCost ClearTile_Town(TileIndex tile, byte flags)

   471

{

   472

	int rating;

   473

	CommandCost cost;

   474

	Town *t;

   475

	HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));

   476

   477

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

   478

	if (!CanDeleteHouse(tile)) return CMD_ERROR;

   479

   480

	cost.AddCost(_price.remove_house * hs->removal_cost >> 8);

   481

   482

	rating = hs->remove_rating_decrease;

   483

	_cleared_town_rating += rating;

   484

	_cleared_town = t = GetTownByTile(tile);

   485

   486

	if (IsValidPlayer(_current_player)) {

   487

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

   488

			SetDParam(0, t->index);

   489

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);