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/* $Id$ */

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/** @file town_cmd.cpp Handling of town tiles. */

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#include "stdafx.h"

     6

#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"

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#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_base.h"

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#include "player_base.h"

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#include "news_func.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 "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 "newgrf_cargo.h"

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#include "oldpool_func.h"

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#include "sprite.h"

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#include "economy_func.h"

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#include "station_func.h"

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#include "cheat_func.h"

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#include "functions.h"

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#include "animated_tile_func.h"

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#include "date_func.h"

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    51

#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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    55

uint _total_towns;

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HouseSpec _house_specs[HOUSE_MAX];

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    58

Town *_cleared_town;

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int _cleared_town_rating;

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    61

/* Initialize the town-pool */

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DEFINE_OLD_POOL_GENERIC(Town, Town)

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    64

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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	free(this->name);

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    74

	if (CleaningPool()) return;

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    76

	Industry *i;

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    78

	/* 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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	InvalidateWindowData(WC_TOWN_DIRECTORY, 0, 0);

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	_total_towns--;

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    84

	/* Delete all industries belonging to the town */

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

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    87

	/* 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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			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;

   100

   101

			default:

   102

				break;

   103

		}

   104

	}

   105

   106

	DeleteSubsidyWithTown(this->index);

   107

   108

	MarkWholeScreenDirty();

   109

   110

	this->xy = 0;

   111

}

   112

   113

/**

   114

 * Generate a random town road layout.

   115

 *

   116

 * The layout is based on the TileHash.

   117

 */

   118

void Town::InitializeLayout()

   119

{

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	this->layout = (TownLayout)(TileHash(TileX(this->xy), TileY(this->xy)) % NUM_TLS);

   121

   122

	/* Set invalid layouts to valid ones */

   123

	switch (this->layout) {

   124

		default: break;

   125

		case TL_RANDOM: this->layout = TL_ORIGINAL; break;

   126

		case TL_NO_ROADS: this->layout = TL_BETTER_ROADS; break;

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	}

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}

   129

   130

Money HouseSpec::GetRemovalCost() const

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{

   132

	return (_price.remove_house * this->removal_cost) >> 8;

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}

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// Local

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static int _grow_town_result;

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   138

/* Describe the possible states */

   139

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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};

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   145

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

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   147

static void TownDrawHouseLift(const TileInfo *ti)

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{

   149

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

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}

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   152

typedef void TownDrawTileProc(const TileInfo *ti);

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static TownDrawTileProc *const _town_draw_tile_procs[1] = {

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	TownDrawHouseLift

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};

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   157

/**

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 * Return a random direction

   159

 *

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 * @return a random direction

   161

 */

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static inline DiagDirection RandomDiagDir()

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{

   164

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

   165

}

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   167

/**

   168

 * 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

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 */

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static void DrawTile_Town(TileInfo *ti)

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{

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	HouseID house_id = GetHouseType(ti->tile);

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   176

	if (house_id >= NEW_HOUSE_OFFSET) {

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

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

   179

		 * house id is drawn instead. */

   180

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

   181

			DrawNewHouseTile(ti, house_id);

   182

			return;

   183

		} else {

   184

			house_id = GetHouseSpecs(house_id)->substitute_id;

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		}

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	}

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   188

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

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	const DrawBuildingsTileStruct *dcts = &_town_draw_tile_data[house_id << 4 | TileHash2Bit(ti->x, ti->y) << 2 | GetHouseBuildingStage(ti->tile)];

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   191

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

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   193

	DrawGroundSprite(dcts->ground.sprite, dcts->ground.pal);

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   195

	/* If houses are invisible, do not draw the upper part */

   196

	if (IsInvisibilitySet(TO_HOUSES)) return;

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   198

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

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	SpriteID image = dcts->building.sprite;

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	if (image != 0) {

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		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)

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		);

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   211

		if (IsTransparencySet(TO_HOUSES)) return;

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	}

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	{

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		int proc = dcts->draw_proc - 1;

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   217

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

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	}

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}

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

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{

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	return GetTileMaxZ(tile);

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}

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static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)

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{

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	return FlatteningFoundation(tileh);

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}

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/**

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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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{

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	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {

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		AnimateNewHouseTile(tile);

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		return;

   242

	}

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   244

	if (_tick_counter & 3) return;

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   246

	/* 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)) {

   251

		DeleteAnimatedTile(tile);

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		return;

   253

	}

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   255

	if (!LiftHasDestination(tile)) {

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		uint i;

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		/* 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) */

   262

		do {

   263

			i = RandomRange(7);

   264

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

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   266

		SetLiftDestination(tile, i);

   267

	}

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   269

	int pos = GetLiftPosition(tile);

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	int dest = GetLiftDestination(tile) * 6;

   271

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

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	SetLiftPosition(tile, pos);

   273

   274

	if (pos == dest) {

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		HaltLift(tile);

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		DeleteAnimatedTile(tile);

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	}

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   279

	MarkTileDirtyByTile(tile);

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}

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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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{

   290

	const Town *t;

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   292

	FOR_ALL_TOWNS(t) {

   293

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

   294

	}

   295

	return false;

   296

}

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   298

/**

   299

 * Marks the town sign as needing a repaint.

   300

 *

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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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{

   308

	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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   316

/**

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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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	MarkTownSignDirty(t);

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	Point 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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		_settings_client.gui.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

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	MarkTownSignDirty(t);

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}

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

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void UpdateAllTownVirtCoords()

   334

{

   335

	Town *t;

   336

	FOR_ALL_TOWNS(t) {

   337

		UpdateTownVirtCoord(t);

   338

	}

   339

}

   340

   341

/**

   342

 * Change the towns population

   343

 * @param t Town which polulation has changed

   344

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

   345

 */

   346

static void ChangePopulation(Town *t, int mod)

   347

{

   348

	t->population += mod;

   349

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   350

	UpdateTownVirtCoord(t);

   351

   352

	InvalidateWindowData(WC_TOWN_DIRECTORY, 0, 1);

   353

}

   354

   355

/**

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 * Determines the world population

   357

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

   358

 * @return uint32 the calculated population of the world

   359

 */

   360

uint32 GetWorldPopulation()

   361

{

   362

	uint32 pop = 0;

   363

	const Town *t;

   364

   365

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

   366

	return pop;

   367

}

   368

   369

/**

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 * Helper function for house completion stages progression

   371

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

   372

 */

   373

static void MakeSingleHouseBigger(TileIndex tile)

   374

{

   375

	assert(IsTileType(tile, MP_HOUSE));

   376

   377

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

   378

	if (LiftHasDestination(tile)) return;

   379

   380

	/* progress in construction stages */

   381

	IncHouseConstructionTick(tile);

   382

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

   383

   384

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

   385

   386

	/* Check and/or  */

   387

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

   388

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

   389

		if (callback_res != CALLBACK_FAILED) ChangeHouseAnimationFrame(hs->grffile, tile, callback_res);

   390

	}

   391

   392

	if (IsHouseCompleted(tile)) {

   393

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

   394

		 * building to the town. */

   395

		ChangePopulation(GetTownByTile(tile), hs->population);

   396

		SetHouseConstructionYear(tile, _cur_year);

   397

	}

   398

	MarkTileDirtyByTile(tile);

   399

}

   400

   401

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

   402

 * @param tile TileIndex of house

   403

 */

   404

static void MakeTownHouseBigger(TileIndex tile)

   405

{

   406

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

   407

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

   408

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

   409

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

   410

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

   411

}

   412

   413

/**

   414

 * Periodic tic handler for houses and town

   415

 * @param tile been asked to do its stuff

   416

 */

   417

static void TileLoop_Town(TileIndex tile)

   418

{

   419

	HouseID house_id = GetHouseType(tile);

   420

   421

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

   422

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

   423

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

   424

   425

	if (!IsHouseCompleted(tile)) {

   426

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

   427

		MakeTownHouseBigger(tile);

   428

		return;

   429

	}

   430

   431

	const HouseSpec *hs = GetHouseSpecs(house_id);

   432

   433

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

   434

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

   435

			house_id < NEW_HOUSE_OFFSET &&

   436

			!LiftHasDestination(tile) &&

   437

			Chance16(1, 2)) {

   438

		AddAnimatedTile(tile);

   439

	}

   440

   441

	Town *t = GetTownByTile(tile);

   442

	uint32 r = Random();

   443

   444

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

   445

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

   446

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

   447

   448

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

   449

   450

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

   451

			if (cargo == CT_INVALID) continue;

   452

   453

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

   454

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

   455

   456

			const CargoSpec *cs = GetCargo(cargo);

   457

			switch (cs->town_effect) {

   458

				case TE_PASSENGERS:

   459

					t->new_max_pass += amt;

   460

					t->new_act_pass += moved;

   461

					break;

   462

   463

				case TE_MAIL:

   464

					t->new_max_mail += amt;

   465

					t->new_act_mail += moved;

   466

					break;

   467

   468

				default:

   469

					break;

   470

			}

   471

		}

   472

	} else {

   473

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

   474

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

   475

   476

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

   477

			t->new_max_pass += amt;

   478

			t->new_act_pass += MoveGoodsToStation(tile, 1, 1, CT_PASSENGERS, amt);

   479

		}

   480

   481

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

   482

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

   483

   484

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

   485

			t->new_max_mail += amt;

   486

			t->new_act_mail += MoveGoodsToStation(tile, 1, 1, CT_MAIL, amt);

   487

		}