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/* $Id$ */

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/** @file town_cmd.cpp */

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#include "stdafx.h"

     6

#include "openttd.h"

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#include "functions.h"

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#include "debug.h"

     9

#include "strings.h"

    10

#include "road_map.h"

    11

#include "table/strings.h"

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#include "table/sprites.h"

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#include "map.h"

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#include "landscape.h"

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#include "tile.h"

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#include "town_map.h"

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#include "tunnel_map.h"

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#include "viewport.h"

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#include "town.h"

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#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"

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#include "gui.h"

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#include "unmovable_map.h"

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#include "water_map.h"

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#include "variables.h"

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#include "bridge.h"

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#include "bridge_map.h"

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#include "date.h"

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#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"

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#include "autoslope.h"

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#include "waypoint.h"

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    47

/* Initialize the town-pool */

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DEFINE_OLD_POOL_GENERIC(Town, Town)

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    50

Town::Town(TileIndex tile)

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{

    52

	if (tile != 0) _total_towns++;

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	this->xy = tile;

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}

    55

    56

Town::~Town()

    57

{

    58

	DeleteName(this->townnametype);

    59

    60

	if (CleaningPool()) return;

    61

    62

	Industry *i;

    63

    64

	/* Delete town authority window

    65

	 * and remove from list of sorted towns */

    66

	DeleteWindowById(WC_TOWN_VIEW, this->index);

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	_town_sort_dirty = true;

    68

	_total_towns--;

    69

    70

	/* Delete all industries belonging to the town */

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

    72

    73

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

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

    75

		switch (GetTileType(tile)) {

    76

			case MP_HOUSE:

    77

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

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				break;

    79

    80

			case MP_ROAD:

    81

			case MP_TUNNELBRIDGE:

    82

				if (IsTileOwner(tile, OWNER_TOWN) &&

    83

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

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

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				break;

    86

    87

			default:

    88

				break;

    89

		}

    90

	}

    91

    92

	DeleteSubsidyWithTown(this->index);

    93

    94

	MarkWholeScreenDirty();

    95

    96

	this->xy = 0;

    97

}

    98

    99

// Local

   100

static int _grow_town_result;

   101

   102

/* Describe the possible states */

   103

enum TownGrowthResult {

   104

	GROWTH_SUCCEED         = -1,

   105

	GROWTH_SEARCH_STOPPED  =  0

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//	GROWTH_SEARCH_RUNNING >=  1

   107

};

   108

   109

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

   110

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

   111

   112

static void TownDrawHouseLift(const TileInfo *ti)

   113

{

   114

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

   115

}

   116

   117

typedef void TownDrawTileProc(const TileInfo *ti);

   118

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

   119

	TownDrawHouseLift

   120

};

   121

   122

uint OriginalTileRandomiser(uint x, uint y)

   123

{

   124

	uint variant;

   125

	variant  = x >> 4;

   126

	variant ^= x >> 6;

   127

	variant ^= y >> 4;

   128

	variant -= y >> 6;

   129

	variant &= 3;

   130

	return variant;

   131

}

   132

   133

/**

   134

 * Return a random direction

   135

 *

   136

 * @return a random direction

   137

 */

   138

static inline DiagDirection RandomDiagDir()

   139

{

   140

	return (DiagDirection)(3 & Random());

   141

}

   142

   143

/**

   144

 * House Tile drawing handler.

   145

 * Part of the tile loop process

   146

 * @param ti TileInfo of the tile to draw

   147

 */

   148

static void DrawTile_Town(TileInfo *ti)

   149

{

   150

	const DrawBuildingsTileStruct *dcts;

   151

	SpriteID image;

   152

	SpriteID pal;

   153

	HouseID house_id = GetHouseType(ti->tile);

   154

   155

	if (house_id >= NEW_HOUSE_OFFSET) {

   156

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

   157

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

   158

		 * house id is drawn instead. */

   159

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

   160

			DrawNewHouseTile(ti, house_id);

   161

			return;

   162

		} else {

   163

			house_id = GetHouseSpecs(house_id)->substitute_id;

   164

		}

   165

	}

   166

   167

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

   168

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

   169

   170

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

   171

   172

	image = dcts->ground.sprite;

   173

	pal   = dcts->ground.pal;

   174

	DrawGroundSprite(image, pal);

   175

   176

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

   177

	image = dcts->building.sprite;

   178

	if (image != 0) {

   179

		AddSortableSpriteToDraw(image, dcts->building.pal,

   180

			ti->x + dcts->subtile_x,

   181

			ti->y + dcts->subtile_y,

   182

			dcts->width,

   183

			dcts->height,

   184

			dcts->dz,

   185

			ti->z,

   186

			HASBIT(_transparent_opt, TO_HOUSES)

   187

		);

   188

   189

		if (HASBIT(_transparent_opt, TO_HOUSES)) return;

   190

	}

   191

   192

	{

   193

		int proc = dcts->draw_proc - 1;

   194

   195

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

   196

	}

   197

}

   198

   199

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

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{

   201

	return GetTileMaxZ(tile);

   202

}

   203

   204

static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)

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{

   206

	return FlatteningFoundation(tileh);

   207

}

   208

   209

/**

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 * Animate a tile for a town

   211

 * Only certain houses can be animated

   212

 * The newhouses animation superseeds regular ones

   213

 * @param tile TileIndex of the house to animate

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 */

   215

static void AnimateTile_Town(TileIndex tile)

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{

   217

	int pos, dest;

   218

   219

	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {

   220

		AnimateNewHouseTile(tile);

   221

		return;

   222

	}

   223

   224

	if (_tick_counter & 3) return;

   225

   226

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

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

   228

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

   229

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

   230

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

   231

		DeleteAnimatedTile(tile);

   232

		return;

   233

	}

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   235

	if (!LiftHasDestination(tile)) {

   236

		int i;

   237

   238

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

   239

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

   240

		 *  the height of 2 'normal' floors.

   241

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

   242

		do {

   243

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

   244

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

   245

   246

		SetLiftDestination(tile, i);

   247

	}

   248

   249

	pos = GetLiftPosition(tile);

   250

	dest = GetLiftDestination(tile) * 6;

   251

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

   252

	SetLiftPosition(tile, pos);

   253

   254

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

   255

   256

	MarkTileDirtyByTile(tile);

   257

}

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   259

static void UpdateTownRadius(Town *t);

   260

   261

/**

   262

 * Determines if a town is close to a tile

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 * @param tile TileIndex of the tile to query

   264

 * @param dist maximum distance to be accepted

   265

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

   266

 */

   267

static bool IsCloseToTown(TileIndex tile, uint dist)

   268

{

   269

	const Town* t;

   270

   271

	FOR_ALL_TOWNS(t) {

   272

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

   273

	}

   274

	return false;

   275

}

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   277

/**

   278

 * Marks the town sign as needing a repaint.

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 *

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 * This function marks the area of the sign of a town as dirty for repaint.

   281

 *

   282

 * @param t Town requesting town sign for repaint

   283

 * @ingroup dirty

   284

 */

   285

static void MarkTownSignDirty(Town *t)

   286

{

   287

	MarkAllViewportsDirty(

   288

		t->sign.left - 6,

   289

		t->sign.top - 3,

   290

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

   291

		t->sign.top + 45

   292

	);

   293

}

   294

   295

/**

   296

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

   297

 * population (creation or growth or else)

   298

 * @param t Town to update

   299

 */

   300

void UpdateTownVirtCoord(Town *t)

   301

{

   302

	Point pt;

   303

   304

	MarkTownSignDirty(t);

   305

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

   306

	SetDParam(0, t->index);

   307

	SetDParam(1, t->population);

   308

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

   309

		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

   310

	MarkTownSignDirty(t);

   311

}

   312

   313

/**

   314

 * Change the towns population

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 * @param t Town which polulation has changed

   316

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

   317

 */

   318

static void ChangePopulation(Town *t, int mod)

   319

{

   320

	t->population += mod;

   321

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   322

	UpdateTownVirtCoord(t);

   323

   324

	if (_town_sort_order & 2) _town_sort_dirty = true;

   325

}

   326

   327

/**

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 * Determines the world population

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

   330

 * @return uint32 the calculated population of the world

   331

 */

   332

uint32 GetWorldPopulation()

   333

{

   334

	uint32 pop;

   335

	const Town* t;

   336

   337

	pop = 0;

   338

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

   339

	return pop;

   340

}

   341

   342

/**

   343

 * Helper function for house completion stages progression

   344

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

   345

 */

   346

static void MakeSingleHouseBigger(TileIndex tile)

   347

{

   348

	assert(IsTileType(tile, MP_HOUSE));

   349

   350

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

   351

	if (LiftHasDestination(tile)) return;

   352

   353

	/* progress in construction stages */

   354

	IncHouseConstructionTick(tile);

   355

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

   356

   357

	/* Check and/or  */

   358

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

   359

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

   360

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

   361

	}

   362

   363

	if (IsHouseCompleted(tile)) {

   364

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

   365

		 * building to the town. */

   366

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

   367

	}

   368

	MarkTileDirtyByTile(tile);

   369

}

   370

   371

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

   372

 * @param tile TileIndex of house

   373

 */

   374

static void MakeTownHouseBigger(TileIndex tile)

   375

{

   376

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

   377

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

   378

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

   379

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

   380

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

   381

}

   382

   383

/**

   384

 * Periodic tic handler for houses and town

   385

 * @param tile been asked to do its stuff

   386

 */

   387

static void TileLoop_Town(TileIndex tile)

   388

{

   389

	Town *t;

   390

	uint32 r;

   391

	HouseID house_id = GetHouseType(tile);

   392

	HouseSpec *hs = GetHouseSpecs(house_id);

   393

   394

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

   395

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

   396

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

   397

   398

	if (!IsHouseCompleted(tile)) {

   399

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

   400

		MakeTownHouseBigger(tile);

   401

		return;

   402

	}

   403

   404

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

   405

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

   406

			house_id < NEW_HOUSE_OFFSET &&

   407

			!LiftHasDestination(tile) &&

   408

			CHANCE16(1, 2))

   409

		AddAnimatedTile(tile);

   410

   411

	t = GetTownByTile(tile);

   412

   413

	r = Random();

   414

   415

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

   416

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

   417

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

   418

   419

			if (callback == CALLBACK_FAILED) break;

   420

			if (callback == 0x20FF) break;

   421

   422

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

   423

			if (cargo == CT_INVALID) continue;

   424

   425

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

   426

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

   427

   428

			const CargoSpec *cs = GetCargo(cargo);

   429

			switch (cs->town_effect) {

   430

				case TE_PASSENGERS:

   431

					t->new_max_pass += amt;

   432

					t->new_act_pass += moved;

   433

					break;

   434

   435

				case TE_MAIL:

   436

					t->new_max_mail += amt;

   437

					t->new_act_mail += moved;

   438

					break;

   439

   440

				default:

   441

					break;

   442

			}

   443

		}

   444

	} else {

   445

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

   446

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

   447

			uint moved;

   448

   449

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

   450

			t->new_max_pass += amt;

   451

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

   452

			t->new_act_pass += moved;

   453

		}

   454

   455

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

   456

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

   457

			uint moved;

   458

   459

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

   460

			t->new_max_mail += amt;

   461

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

   462

			t->new_act_mail += moved;

   463

		}

   464

	}

   465

   466

	_current_player = OWNER_TOWN;

   467

   468

	if (hs->building_flags & BUILDING_HAS_1_TILE &&

   469

			HASBIT(t->flags12, TOWN_IS_FUNDED) &&

   470

			CanDeleteHouse(tile) &&

   471

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

   472

			--t->time_until_rebuild == 0) {

   473

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

   474

   475

		ClearTownHouse(t, tile);

   476

   477

		/* Rebuild with another house? */

   478

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

   479

	}

   480

   481

	_current_player = OWNER_NONE;

   482

}

   483

   484

/**

   485

 * Unused handler

   486

 * @param tile unused

   487

 */

   488

static void ClickTile_Town(TileIndex tile)

   489

{