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/* $Id$ */

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/** @file town_cmd.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "tile_cmd.h"

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#include "debug.h"

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#include "road_map.h"

    10

#include "road_internal.h" /* Cleaning up road bits */

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#include "landscape.h"

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#include "town_map.h"

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#include "tunnel_map.h"

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#include "viewport_func.h"

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#include "town.h"

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#include "command_func.h"

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#include "industry.h"

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#include "station.h"

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#include "player_base.h"

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#include "news.h"

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#include "saveload.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 "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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#include "transparency.h"

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#include "tunnelbridge_map.h"

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#include "strings_func.h"

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#include "window_func.h"

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#include "string_func.h"

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#include "table/strings.h"

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#include "table/sprites.h"

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#include "table/town_land.h"

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    47

uint _total_towns;

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HouseSpec _house_specs[HOUSE_MAX];

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    50

bool _town_sort_dirty;

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byte _town_sort_order;

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const Town **_town_sort;

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    54

Town *_cleared_town;

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int _cleared_town_rating;

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    57

/* Initialize the town-pool */

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DEFINE_OLD_POOL_GENERIC(Town, Town)

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    60

Town::Town(TileIndex tile)

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{

    62

	if (tile != 0) _total_towns++;

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	this->xy = tile;

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}

    65

    66

Town::~Town()

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{

    68

	free(this->name);

    69

    70

	if (CleaningPool()) return;

    71

    72

	Industry *i;

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    74

	/* Delete town authority window

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	 * and remove from list of sorted towns */

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	DeleteWindowById(WC_TOWN_VIEW, this->index);

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	_town_sort_dirty = true;

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	_total_towns--;

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    80

	/* Delete all industries belonging to the town */

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

    82

    83

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

    84

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

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		switch (GetTileType(tile)) {

    86

			case MP_HOUSE:

    87

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

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				break;

    89

    90

			case MP_ROAD:

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			case MP_TUNNELBRIDGE:

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				if (IsTileOwner(tile, OWNER_TOWN) &&

    93

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

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

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				break;

    96

    97

			default:

    98

				break;

    99

		}

   100

	}

   101

   102

	DeleteSubsidyWithTown(this->index);

   103

   104

	MarkWholeScreenDirty();

   105

   106

	this->xy = 0;

   107

}

   108

   109

// Local

   110

static int _grow_town_result;

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   112

/* Describe the possible states */

   113

enum TownGrowthResult {

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	GROWTH_SUCCEED         = -1,

   115

	GROWTH_SEARCH_STOPPED  =  0

   116

//	GROWTH_SEARCH_RUNNING >=  1

   117

};

   118

   119

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

   120

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

   121

   122

static void TownDrawHouseLift(const TileInfo *ti)

   123

{

   124

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

   125

}

   126

   127

typedef void TownDrawTileProc(const TileInfo *ti);

   128

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

   129

	TownDrawHouseLift

   130

};

   131

   132

uint OriginalTileRandomiser(uint x, uint y)

   133

{

   134

	uint variant;

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	variant  = x >> 4;

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	variant ^= x >> 6;

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	variant ^= y >> 4;

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	variant -= y >> 6;

   139

	variant &= 3;

   140

	return variant;

   141

}

   142

   143

/**

   144

 * Return a random direction

   145

 *

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 * @return a random direction

   147

 */

   148

static inline DiagDirection RandomDiagDir()

   149

{

   150

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

   151

}

   152

   153

/**

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 * House Tile drawing handler.

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 * Part of the tile loop process

   156

 * @param ti TileInfo of the tile to draw

   157

 */

   158

static void DrawTile_Town(TileInfo *ti)

   159

{

   160

	const DrawBuildingsTileStruct *dcts;

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	SpriteID image;

   162

	SpriteID pal;

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	HouseID house_id = GetHouseType(ti->tile);

   164

   165

	if (house_id >= NEW_HOUSE_OFFSET) {

   166

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

   167

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

   168

		 * house id is drawn instead. */

   169

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

   170

			DrawNewHouseTile(ti, house_id);

   171

			return;

   172

		} else {

   173

			house_id = GetHouseSpecs(house_id)->substitute_id;

   174

		}

   175

	}

   176

   177

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

   178

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

   179

   180

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

   181

   182

	image = dcts->ground.sprite;

   183

	pal   = dcts->ground.pal;

   184

	DrawGroundSprite(image, pal);

   185

   186

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

   187

	image = dcts->building.sprite;

   188

	if (image != 0) {

   189

		AddSortableSpriteToDraw(image, dcts->building.pal,

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			ti->x + dcts->subtile_x,

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			ti->y + dcts->subtile_y,

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			dcts->width,

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			dcts->height,

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			dcts->dz,

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			ti->z,

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			IsTransparencySet(TO_HOUSES)

   197

		);

   198

   199

		if (IsTransparencySet(TO_HOUSES)) return;

   200

	}

   201

   202

	{

   203

		int proc = dcts->draw_proc - 1;

   204

   205

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

   206

	}

   207

}

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   209

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

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{

   211

	return GetTileMaxZ(tile);

   212

}

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   214

static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)

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{

   216

	return FlatteningFoundation(tileh);

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}

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   219

/**

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 * Animate a tile for a town

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 * Only certain houses can be animated

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 * The newhouses animation superseeds regular ones

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 * @param tile TileIndex of the house to animate

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 */

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static void AnimateTile_Town(TileIndex tile)

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{

   227

	int pos, dest;

   228

   229

	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {

   230

		AnimateNewHouseTile(tile);

   231

		return;

   232

	}

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   234

	if (_tick_counter & 3) return;

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   236

	/* 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.

   238

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

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

   240

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

   241

		DeleteAnimatedTile(tile);

   242

		return;

   243

	}

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   245

	if (!LiftHasDestination(tile)) {

   246

		int i;

   247

   248

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

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

   250

		 *  the height of 2 'normal' floors.

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

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		do {

   253

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

   254

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

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   256

		SetLiftDestination(tile, i);

   257

	}

   258

   259

	pos = GetLiftPosition(tile);

   260

	dest = GetLiftDestination(tile) * 6;

   261

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

   262

	SetLiftPosition(tile, pos);

   263

   264

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

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   266

	MarkTileDirtyByTile(tile);

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}

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   269

static void UpdateTownRadius(Town *t);

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   271

/**

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 * Determines if a town is close to a tile

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 * @param tile TileIndex of the tile to query

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 * @param dist maximum distance to be accepted

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

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 */

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static bool IsCloseToTown(TileIndex tile, uint dist)

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{

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	const Town* t;

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   281

	FOR_ALL_TOWNS(t) {

   282

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

   283

	}

   284

	return false;

   285

}

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   287

/**

   288

 * 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.

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 *

   292

 * @param t Town requesting town sign for repaint

   293

 * @ingroup dirty

   294

 */

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static void MarkTownSignDirty(Town *t)

   296

{

   297

	MarkAllViewportsDirty(

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		t->sign.left - 6,

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		t->sign.top - 3,

   300

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

   301

		t->sign.top + 45

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	);

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}

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   305

/**

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

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 * population (creation or growth or else)

   308

 * @param t Town to update

   309

 */

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void UpdateTownVirtCoord(Town *t)

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{

   312

	Point pt;

   313

   314

	MarkTownSignDirty(t);

   315

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

   316

	SetDParam(0, t->index);

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	SetDParam(1, t->population);

   318

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

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		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

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	MarkTownSignDirty(t);

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}

   322

   323

/** Update the virtual coords needed to draw the town sign for all towns. */

   324

void UpdateAllTownVirtCoords()

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{

   326

	Town *t;

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	FOR_ALL_TOWNS(t) {

   328

		UpdateTownVirtCoord(t);

   329

	}

   330

}

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   332

/**

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 * Change the towns population

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 * @param t Town which polulation has changed

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

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 */

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static void ChangePopulation(Town *t, int mod)

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{

   339

	t->population += mod;

   340

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   341

	UpdateTownVirtCoord(t);

   342

   343

	if (_town_sort_order & 2) _town_sort_dirty = true;

   344

}

   345

   346

/**

   347

 * Determines the world population

   348

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

   349

 * @return uint32 the calculated population of the world

   350

 */

   351

uint32 GetWorldPopulation()

   352

{

   353

	uint32 pop;

   354

	const Town* t;

   355

   356

	pop = 0;

   357

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

   358

	return pop;

   359

}

   360

   361

/**

   362

 * Helper function for house completion stages progression

   363

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

   364

 */

   365

static void MakeSingleHouseBigger(TileIndex tile)

   366

{

   367

	assert(IsTileType(tile, MP_HOUSE));

   368

   369

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

   370

	if (LiftHasDestination(tile)) return;

   371

   372

	/* progress in construction stages */

   373

	IncHouseConstructionTick(tile);

   374

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

   375

   376

	/* Check and/or  */

   377

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

   378

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

   379

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

   380

	}

   381

   382

	if (IsHouseCompleted(tile)) {

   383

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

   384

		 * building to the town. */

   385

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

   386

	}

   387

	MarkTileDirtyByTile(tile);

   388

}

   389

   390

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

   391

 * @param tile TileIndex of house

   392

 */

   393

static void MakeTownHouseBigger(TileIndex tile)

   394

{

   395

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

   396

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

   397

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

   398

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

   399

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

   400

}

   401

   402

/**

   403

 * Periodic tic handler for houses and town

   404

 * @param tile been asked to do its stuff

   405

 */

   406

static void TileLoop_Town(TileIndex tile)

   407

{

   408

	Town *t;

   409

	uint32 r;

   410

	HouseID house_id = GetHouseType(tile);

   411

	HouseSpec *hs = GetHouseSpecs(house_id);

   412

   413

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

   414

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

   415

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

   416

   417

	if (!IsHouseCompleted(tile)) {

   418

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

   419

		MakeTownHouseBigger(tile);

   420

		return;

   421

	}

   422

   423

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

   424

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

   425

			house_id < NEW_HOUSE_OFFSET &&

   426

			!LiftHasDestination(tile) &&

   427

			Chance16(1, 2))

   428

		AddAnimatedTile(tile);

   429

   430

	t = GetTownByTile(tile);

   431

   432

	r = Random();

   433

   434

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

   435

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

   436

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

   437

   438

			if (callback == CALLBACK_FAILED || callback == CALLBACK_HOUSEPRODCARGO_END) break;

   439

   440

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

   441

			if (cargo == CT_INVALID) continue;

   442

   443

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

   444

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

   445

   446

			const CargoSpec *cs = GetCargo(cargo);

   447

			switch (cs->town_effect) {

   448

				case TE_PASSENGERS:

   449

					t->new_max_pass += amt;

   450

					t->new_act_pass += moved;

   451

					break;

   452

   453

				case TE_MAIL:

   454

					t->new_max_mail += amt;

   455

					t->new_act_mail += moved;

   456

					break;

   457

   458

				default:

   459

					break;

   460

			}

   461

		}

   462

	} else {

   463

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

   464

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

   465

			uint moved;

   466

   467

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

   468

			t->new_max_pass += amt;

   469

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

   470

			t->new_act_pass += moved;

   471

		}

   472

   473

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

   474

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

   475

			uint moved;

   476

   477

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

   478

			t->new_max_mail += amt;

   479

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

   480

			t->new_act_mail += moved;

   481

		}

   482

	}

   483

   484

	_current_player = OWNER_TOWN;

   485

   486

	if (hs->building_flags & BUILDING_HAS_1_TILE &&

   487

			HasBit(t->flags12, TOWN_IS_FUNDED) &&

   488

			CanDeleteHouse(tile) &&