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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 "debug.h"

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#include "road_map.h"

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#include "table/strings.h"

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#include "table/sprites.h"

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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 "town.h"

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#include "industry.h"

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#include "station.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 "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 "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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#include "transparency.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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{

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	if (tile != 0) _total_towns++;

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	this->xy = tile;

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}

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Town::~Town()

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{

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	DeleteName(this->townnametype);

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    60

	if (CleaningPool()) return;

    61

    62

	Industry *i;

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    64

	/* Delete town authority window

    65

	 * 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--;

    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) {

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		switch (GetTileType(tile)) {

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			case MP_HOUSE:

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

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				break;

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    80

			case MP_ROAD:

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			case MP_TUNNELBRIDGE:

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				if (IsTileOwner(tile, OWNER_TOWN) &&

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						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);

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    94

	MarkWholeScreenDirty();

    95

    96

	this->xy = 0;

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}

    98

    99

// Local

   100

static int _grow_town_result;

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   102

/* Describe the possible states */

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enum TownGrowthResult {

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	GROWTH_SUCCEED         = -1,

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	GROWTH_SEARCH_STOPPED  =  0

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//	GROWTH_SEARCH_RUNNING >=  1

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};

   108

   109

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

   110

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

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   112

static void TownDrawHouseLift(const TileInfo *ti)

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{

   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] = {

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	TownDrawHouseLift

   120

};

   121

   122

uint OriginalTileRandomiser(uint x, uint y)

   123

{

   124

	uint variant;

   125

	variant  = x >> 4;

   126

	variant ^= x >> 6;

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	variant ^= y >> 4;

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	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.

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 * Part of the tile loop process

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 * @param ti TileInfo of the tile to draw

   147

 */

   148

static void DrawTile_Town(TileInfo *ti)

   149

{

   150

	const DrawBuildingsTileStruct *dcts;

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	SpriteID image;

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	SpriteID pal;

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	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);

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			return;

   162

		} else {

   163

			house_id = GetHouseSpecs(house_id)->substitute_id;

   164

		}

   165

	}

   166

   167

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

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

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   170

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

   171

   172

	image = dcts->ground.sprite;

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	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,

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			ti->x + dcts->subtile_x,

   181

			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)

   187

		);

   188

   189

		if (IsTransparencySet(TO_HOUSES)) return;

   190

	}

   191

   192

	{

   193

		int proc = dcts->draw_proc - 1;

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   195

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

   196

	}

   197

}

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   199

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

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{

   201

	return GetTileMaxZ(tile);

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}

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   204

static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)

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{

   206

	return FlatteningFoundation(tileh);

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}

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   209

/**

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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

   213

 * @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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{

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	int pos, dest;

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   219

	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {

   220

		AnimateNewHouseTile(tile);

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		return;

   222

	}

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   224

	if (_tick_counter & 3) return;

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   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.

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	 * 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?? */

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

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		DeleteAnimatedTile(tile);

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		return;

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	}

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   235

	if (!LiftHasDestination(tile)) {

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		int i;

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   238

		/*  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,

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		 *  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 {

   243

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

   244

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

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   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);

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   254

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

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   256

	MarkTileDirtyByTile(tile);

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}

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static void UpdateTownRadius(Town *t);

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/**

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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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{

   269

	const Town* t;

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   271

	FOR_ALL_TOWNS(t) {

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

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	}

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	return false;

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}

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/**

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 * 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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 *

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 * @param t Town requesting town sign for repaint

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 * @ingroup dirty

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 */

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static void MarkTownSignDirty(Town *t)

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{

   287

	MarkAllViewportsDirty(

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		t->sign.left - 6,

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		t->sign.top - 3,

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

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		t->sign.top + 45

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	);

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}

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/**

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

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 * population (creation or growth or else)

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 * @param t Town to update

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 */

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void UpdateTownVirtCoord(Town *t)

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{

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	Point pt;

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   304

	MarkTownSignDirty(t);

   305

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

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	SetDParam(0, t->index);

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	SetDParam(1, t->population);

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	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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}

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   322

/**

   323

 * 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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{

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	t->population += mod;

   330

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   331

	UpdateTownVirtCoord(t);

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   333

	if (_town_sort_order & 2) _town_sort_dirty = true;

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}

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   336

/**

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 * Determines the world population

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

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 * @return uint32 the calculated population of the world

   340

 */

   341

uint32 GetWorldPopulation()

   342

{

   343

	uint32 pop;

   344

	const Town* t;

   345

   346

	pop = 0;

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

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	return pop;

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}

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   351

/**

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 * Helper function for house completion stages progression

   353

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

   354

 */

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static void MakeSingleHouseBigger(TileIndex tile)

   356

{

   357

	assert(IsTileType(tile, MP_HOUSE));

   358

   359

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

   360

	if (LiftHasDestination(tile)) return;

   361

   362

	/* progress in construction stages */

   363

	IncHouseConstructionTick(tile);

   364

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

   365

   366

	/* Check and/or  */

   367

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

   368

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

   369

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

   370

	}

   371

   372

	if (IsHouseCompleted(tile)) {

   373

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

   374

		 * building to the town. */

   375

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

   376

	}

   377

	MarkTileDirtyByTile(tile);

   378

}

   379

   380

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

   381

 * @param tile TileIndex of house

   382

 */

   383

static void MakeTownHouseBigger(TileIndex tile)

   384

{

   385

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

   386

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

   387

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

   388

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

   389

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

   390

}

   391

   392

/**

   393

 * Periodic tic handler for houses and town

   394

 * @param tile been asked to do its stuff

   395

 */

   396

static void TileLoop_Town(TileIndex tile)

   397

{

   398

	Town *t;

   399

	uint32 r;

   400

	HouseID house_id = GetHouseType(tile);

   401

	HouseSpec *hs = GetHouseSpecs(house_id);

   402

   403

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

   404

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

   405

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

   406

   407

	if (!IsHouseCompleted(tile)) {

   408

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

   409

		MakeTownHouseBigger(tile);

   410

		return;

   411

	}

   412

   413

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

   414

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

   415

			house_id < NEW_HOUSE_OFFSET &&

   416

			!LiftHasDestination(tile) &&

   418

		AddAnimatedTile(tile);

   419

   420

	t = GetTownByTile(tile);

   421

   422

	r = Random();

   423

   424

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

   425

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

   426

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

   427

   428

			if (callback == CALLBACK_FAILED) break;

   429

			if (callback == 0x20FF) break;

   430

   431

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

   432

			if (cargo == CT_INVALID) continue;

   433

   434

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

   435

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

   436

   437

			const CargoSpec *cs = GetCargo(cargo);

   438

			switch (cs->town_effect) {

   439

				case TE_PASSENGERS:

   440

					t->new_max_pass += amt;

   441

					t->new_act_pass += moved;

   442

					break;

   443

   444

				case TE_MAIL:

   445

					t->new_max_mail += amt;

   446

					t->new_act_mail += moved;

   447

					break;

   448

   449

				default:

   450

					break;

   451

			}

   452

		}

   453

	} else {

   454

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

   455

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

   456

			uint moved;

   457

   458

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

   459

			t->new_max_pass += amt;

   460

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

   461

			t->new_act_pass += moved;

   462

		}

   463

   464

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

   465

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

   466

			uint moved;

   467

   468

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

   469

			t->new_max_mail += amt;

   470

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

   471

			t->new_act_mail += moved;

   472

		}

   473

	}

   474

   475

	_current_player = OWNER_TOWN;

   476

   477

	if (hs->building_flags & BUILDING_HAS_1_TILE &&

   478

			HasBit(t->flags12, TOWN_IS_FUNDED) &&

   479

			CanDeleteHouse(tile) &&

   480

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

   481

			--t->time_until_rebuild == 0) {

   482

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

   483

   484

		ClearTownHouse(t, tile);

   485

   486

		/* Rebuild with another house? */

   487

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

   488

	}