tron@2186: /* $Id$ */
tron@2186: 
belugas@6527: /** @file town_cmd.cpp */
belugas@6527: 
truelight@0: #include "stdafx.h"
Darkvater@1891: #include "openttd.h"
rubidium@6872: #include "tile_cmd.h"
maedhros@6658: #include "debug.h"
tron@3144: #include "road_map.h"
rubidium@6872: #include "road_internal.h" /* Cleaning up road bits */
maedhros@6669: #include "landscape.h"
tron@3319: #include "town_map.h"
tron@3154: #include "tunnel_map.h"
rubidium@6872: #include "viewport_func.h"
truelight@0: #include "town.h"
rubidium@6872: #include "command_func.h"
truelight@0: #include "industry.h"
richk@10184: #include "station_base.h"
rubidium@6872: #include "player_base.h"
richk@10184: #include "news_func.h"
truelight@0: #include "saveload.h"
truelight@0: #include "gui.h"
tron@3310: #include "unmovable_map.h"
celestar@3433: #include "water_map.h"
tron@2159: #include "variables.h"
celestar@3359: #include "bridge.h"
celestar@5573: #include "bridge_map.h"
truelight@4300: #include "genworld.h"
maedhros@6658: #include "newgrf.h"
maedhros@6658: #include "newgrf_callbacks.h"
maedhros@6658: #include "newgrf_house.h"
richk@6719: #include "newgrf_commons.h"
richk@6720: #include "newgrf_townname.h"
richk@6743: #include "misc/autoptr.hpp"
rubidium@6870: #include "autoslope.h"
rubidium@6871: #include "waypoint.h"
rubidium@6871: #include "transparency.h"
rubidium@6872: #include "tunnelbridge_map.h"
rubidium@6872: #include "strings_func.h"
rubidium@6872: #include "window_func.h"
rubidium@6872: #include "string_func.h"
richk@10184: #include "newgrf_cargo.h"
richk@10184: #include "oldpool_func.h"
rubidium@6872: 
rubidium@6872: #include "table/strings.h"
rubidium@6872: #include "table/sprites.h"
rubidium@6872: #include "table/town_land.h"
rubidium@6872: 
rubidium@6872: uint _total_towns;
rubidium@6872: HouseSpec _house_specs[HOUSE_MAX];
rubidium@6872: 
rubidium@6872: bool _town_sort_dirty;
rubidium@6872: byte _town_sort_order;
rubidium@6872: const Town **_town_sort;
rubidium@6872: 
rubidium@6872: Town *_cleared_town;
rubidium@6872: int _cleared_town_rating;
truelight@1260: 
truelight@1260: /* Initialize the town-pool */
richk@6743: DEFINE_OLD_POOL_GENERIC(Town, Town)
richk@6743: 
richk@6743: Town::Town(TileIndex tile)
richk@6743: {
rubidium@6800: 	if (tile != 0) _total_towns++;
richk@6743: 	this->xy = tile;
richk@6743: }
richk@6743: 
richk@6743: Town::~Town()
truelight@4396: {
rubidium@6872: 	free(this->name);
rubidium@6800: 
rubidium@6800: 	if (CleaningPool()) return;
rubidium@6800: 
truelight@4396: 	Industry *i;
truelight@4396: 
truelight@4396: 	/* Delete town authority window
truelight@4396: 	 * and remove from list of sorted towns */
richk@6743: 	DeleteWindowById(WC_TOWN_VIEW, this->index);
truelight@4396: 	_town_sort_dirty = true;
rubidium@5298: 	_total_towns--;
truelight@4396: 
truelight@4396: 	/* Delete all industries belonging to the town */
richk@6743: 	FOR_ALL_INDUSTRIES(i) if (i->town == this) delete i;
truelight@4396: 
truelight@4396: 	/* Go through all tiles and delete those belonging to the town */
richk@6743: 	for (TileIndex tile = 0; tile < MapSize(); ++tile) {
truelight@4396: 		switch (GetTileType(tile)) {
truelight@4396: 			case MP_HOUSE:
richk@6743: 				if (GetTownByTile(tile) == this) DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@4396: 				break;
truelight@4396: 
richk@6743: 			case MP_ROAD:
truelight@4396: 			case MP_TUNNELBRIDGE:
truelight@4396: 				if (IsTileOwner(tile, OWNER_TOWN) &&
richk@6743: 						ClosestTownFromTile(tile, (uint)-1) == this)
truelight@4396: 					DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@4396: 				break;
truelight@4396: 
truelight@4396: 			default:
truelight@4396: 				break;
truelight@4396: 		}
truelight@4396: 	}
truelight@4396: 
richk@6743: 	DeleteSubsidyWithTown(this->index);
truelight@4396: 
truelight@4396: 	MarkWholeScreenDirty();
richk@6743: 
richk@6743: 	this->xy = 0;
richk@6743: }
richk@6743: 
richk@10184: /**
richk@10184:  * Generate a random town road layout.
richk@10184:  *
richk@10184:  * The layout is based on the TileHash.
richk@10184:  */
richk@10184: void Town::InitializeLayout()
richk@10184: {
richk@10184: 	this->layout = (TownLayout)(TileHash(TileX(this->xy), TileY(this->xy)) % NUM_TLS);
richk@10184: 
richk@10184: 	/* Set invalid layouts to valid ones */
richk@10184: 	switch (this->layout) {
richk@10184: 		default: break;
richk@10184: 		case TL_RANDOM: this->layout = TL_ORIGINAL; break;
richk@10184: 		case TL_NO_ROADS: this->layout = TL_BETTER_ROADS; break;
richk@10184: 	}
richk@10184: }
richk@10184: 
truelight@0: // Local
truelight@0: static int _grow_town_result;
truelight@0: 
rubidium@6870: /* Describe the possible states */
rubidium@6870: enum TownGrowthResult {
rubidium@6870: 	GROWTH_SUCCEED         = -1,
rubidium@6870: 	GROWTH_SEARCH_STOPPED  =  0
rubidium@6870: //	GROWTH_SEARCH_RUNNING >=  1
rubidium@6870: };
rubidium@6870: 
tron@1977: static bool BuildTownHouse(Town *t, TileIndex tile);
truelight@0: 
Darkvater@2436: static void TownDrawHouseLift(const TileInfo *ti)
truelight@0: {
peter1138@5919: 	AddChildSpriteScreen(SPR_LIFT, PAL_NONE, 14, 60 - GetLiftPosition(ti->tile));
truelight@0: }
truelight@0: 
Darkvater@2436: typedef void TownDrawTileProc(const TileInfo *ti);
richk@10184: static TownDrawTileProc *const _town_draw_tile_procs[1] = {
ludde@2065: 	TownDrawHouseLift
truelight@0: };
truelight@0: 
richk@6719: /**
rubidium@6870:  * Return a random direction
rubidium@6870:  *
rubidium@6870:  * @return a random direction
rubidium@6870:  */
rubidium@6870: static inline DiagDirection RandomDiagDir()
rubidium@6870: {
rubidium@6870: 	return (DiagDirection)(3 & Random());
rubidium@6870: }
rubidium@6870: 
rubidium@6870: /**
richk@6719:  * House Tile drawing handler.
richk@6719:  * Part of the tile loop process
richk@6719:  * @param ti TileInfo of the tile to draw
richk@6719:  */
truelight@0: static void DrawTile_Town(TileInfo *ti)
truelight@0: {
maedhros@6658: 	HouseID house_id = GetHouseType(ti->tile);
maedhros@6658: 
maedhros@6658: 	if (house_id >= NEW_HOUSE_OFFSET) {
maedhros@6668: 		/* Houses don't necessarily need new graphics. If they don't have a
maedhros@6668: 		 * spritegroup associated with them, then the sprite for the substitute
maedhros@6668: 		 * house id is drawn instead. */
maedhros@6668: 		if (GetHouseSpecs(house_id)->spritegroup != NULL) {
maedhros@6668: 			DrawNewHouseTile(ti, house_id);
maedhros@6668: 			return;
maedhros@6668: 		} else {
maedhros@6668: 			house_id = GetHouseSpecs(house_id)->substitute_id;
maedhros@6668: 		}
maedhros@6658: 	}
truelight@0: 
truelight@0: 	/* Retrieve pointer to the draw town tile struct */
richk@10184: 	const DrawBuildingsTileStruct *dcts = &_town_draw_tile_data[house_id << 4 | TileHash2Bit(ti->x, ti->y) << 2 | GetHouseBuildingStage(ti->tile)];
truelight@0: 
richk@6743: 	if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
peter1138@5919: 
richk@10184: 	DrawGroundSprite(dcts->ground.sprite, dcts->ground.pal);
richk@10184: 
richk@10184: 	/* If houses are invisible, do not draw the upper part */
richk@10184: 	if (IsInvisibilitySet(TO_HOUSES)) return;
truelight@0: 
truelight@0: 	/* Add a house on top of the ground? */
richk@10184: 	SpriteID image = dcts->building.sprite;
tron@2639: 	if (image != 0) {
richk@6743: 		AddSortableSpriteToDraw(image, dcts->building.pal,
tron@482: 			ti->x + dcts->subtile_x,
tron@482: 			ti->y + dcts->subtile_y,
rubidium@6870: 			dcts->width,
rubidium@6870: 			dcts->height,
truelight@0: 			dcts->dz,
richk@6743: 			ti->z,
rubidium@6871: 			IsTransparencySet(TO_HOUSES)
tron@4053: 		);
truelight@0: 
rubidium@6871: 		if (IsTransparencySet(TO_HOUSES)) return;
truelight@0: 	}
truelight@0: 
truelight@0: 	{
belugas@3654: 		int proc = dcts->draw_proc - 1;
tron@2639: 
tron@2639: 		if (proc >= 0) _town_draw_tile_procs[proc](ti);
truelight@0: 	}
truelight@0: }
truelight@0: 
tron@4231: static uint GetSlopeZ_Town(TileIndex tile, uint x, uint y)
truelight@0: {
tron@4231: 	return GetTileMaxZ(tile);
truelight@0: }
truelight@0: 
richk@6743: static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)
dominik@39: {
richk@6743: 	return FlatteningFoundation(tileh);
dominik@39: }
dominik@39: 
richk@6719: /**
richk@6719:  * Animate a tile for a town
richk@6719:  * Only certain houses can be animated
richk@6719:  * The newhouses animation superseeds regular ones
richk@6719:  * @param tile TileIndex of the house to animate
richk@6719:  */
tron@1977: static void AnimateTile_Town(TileIndex tile)
truelight@0: {
maedhros@6658: 	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {
maedhros@6658: 		AnimateNewHouseTile(tile);
maedhros@6658: 		return;
maedhros@6658: 	}
maedhros@6658: 
tron@2639: 	if (_tick_counter & 3) return;
truelight@0: 
richk@6719: 	/* If the house is not one with a lift anymore, then stop this animating.
richk@6719: 	 * Not exactly sure when this happens, but probably when a house changes.
richk@6719: 	 * Before this was just a return...so it'd leak animated tiles..
richk@6719: 	 * That bug seems to have been here since day 1?? */
maedhros@6658: 	if (!(GetHouseSpecs(GetHouseType(tile))->building_flags & BUILDING_IS_ANIMATED)) {
ludde@2065: 		DeleteAnimatedTile(tile);
ludde@2065: 		return;
ludde@2065: 	}
truelight@0: 
maedhros@6658: 	if (!LiftHasDestination(tile)) {
richk@10184: 		uint i;
richk@10184: 
richk@10184: 		/* Building has 6 floors, number 0 .. 6, where 1 is illegal.
richk@10184: 		 * This is due to the fact that the first floor is, in the graphics,
Darkvater@2891: 		 *  the height of 2 'normal' floors.
richk@10184: 		 * Furthermore, there are 6 lift positions from floor N (incl) to floor N + 1 (excl) */
truelight@0: 		do {
richk@10184: 			i = RandomRange(7);
richk@10184: 		} while (i == 1 || i * 6 == GetLiftPosition(tile));
truelight@0: 
celestar@3426: 		SetLiftDestination(tile, i);
truelight@0: 	}
truelight@0: 
richk@10184: 	int pos = GetLiftPosition(tile);
richk@10184: 	int dest = GetLiftDestination(tile) * 6;
celestar@3426: 	pos += (pos < dest) ? 1 : -1;
celestar@3426: 	SetLiftPosition(tile, pos);
truelight@0: 
celestar@3426: 	if (pos == dest) HaltLift(tile);
truelight@193: 
truelight@0: 	MarkTileDirtyByTile(tile);
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Determines if a town is close to a tile
richk@6719:  * @param tile TileIndex of the tile to query
richk@6719:  * @param dist maximum distance to be accepted
richk@6719:  * @returns true if the tile correspond to the distance criteria
richk@6719:  */
tron@1977: static bool IsCloseToTown(TileIndex tile, uint dist)
truelight@0: {
richk@10184: 	const Town *t;
truelight@0: 
truelight@0: 	FOR_ALL_TOWNS(t) {
truelight@4346: 		if (DistanceManhattan(tile, t->xy) < dist) return true;
truelight@0: 	}
truelight@0: 	return false;
truelight@0: }
truelight@0: 
richk@6719: /**
rubidium@6870:  * Marks the town sign as needing a repaint.
rubidium@6870:  *
rubidium@6870:  * This function marks the area of the sign of a town as dirty for repaint.
rubidium@6870:  *
rubidium@6870:  * @param t Town requesting town sign for repaint
rubidium@6870:  * @ingroup dirty
richk@6719:  */
truelight@835: static void MarkTownSignDirty(Town *t)
truelight@835: {
truelight@835: 	MarkAllViewportsDirty(
richk@6719: 		t->sign.left - 6,
richk@6719: 		t->sign.top - 3,
richk@6719: 		t->sign.left + t->sign.width_1 * 4 + 12,
truelight@835: 		t->sign.top + 45
truelight@835: 	);
truelight@835: }
truelight@835: 
richk@6719: /**
richk@6719:  * Resize the sign(label) of the town after changes in
richk@6719:  * population (creation or growth or else)
richk@6719:  * @param t Town to update
richk@6719:  */
truelight@835: void UpdateTownVirtCoord(Town *t)
truelight@835: {
truelight@835: 	MarkTownSignDirty(t);
richk@10184: 	Point pt = RemapCoords2(TileX(t->xy) * TILE_SIZE, TileY(t->xy) * TILE_SIZE);
ludde@2070: 	SetDParam(0, t->index);
ludde@2070: 	SetDParam(1, t->population);
ludde@2070: 	UpdateViewportSignPos(&t->sign, pt.x, pt.y - 24,
ludde@2070: 		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);
truelight@835: 	MarkTownSignDirty(t);
truelight@835: }
truelight@0: 
rubidium@6871: /** Update the virtual coords needed to draw the town sign for all towns. */
rubidium@6871: void UpdateAllTownVirtCoords()
rubidium@6871: {
rubidium@6871: 	Town *t;
rubidium@6871: 	FOR_ALL_TOWNS(t) {
rubidium@6871: 		UpdateTownVirtCoord(t);
rubidium@6871: 	}
rubidium@6871: }
rubidium@6871: 
richk@6719: /**
richk@6719:  * Change the towns population
richk@6719:  * @param t Town which polulation has changed
richk@6719:  * @param mod polulation change (can be positive or negative)
richk@6719:  */
truelight@0: static void ChangePopulation(Town *t, int mod)
truelight@0: {
truelight@0: 	t->population += mod;
truelight@0: 	InvalidateWindow(WC_TOWN_VIEW, t->index);
truelight@835: 	UpdateTownVirtCoord(t);
truelight@0: 
truelight@0: 	if (_town_sort_order & 2) _town_sort_dirty = true;
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Determines the world population
richk@6719:  * Basically, count population of all towns, one by one
richk@6719:  * @return uint32 the calculated population of the world
richk@6719:  */
rubidium@6573: uint32 GetWorldPopulation()
celestar@1080: {
richk@10184: 	uint32 pop = 0;
richk@10184: 	const Town *t;
richk@10184: 
tron@2639: 	FOR_ALL_TOWNS(t) pop += t->population;
celestar@1080: 	return pop;
celestar@1080: }
celestar@1080: 
richk@6719: /**
richk@6719:  * Helper function for house completion stages progression
richk@6719:  * @param tile TileIndex of the house (or parts of it) to "grow"
richk@6719:  */
tron@1977: static void MakeSingleHouseBigger(TileIndex tile)
truelight@0: {
tron@1035: 	assert(IsTileType(tile, MP_HOUSE));
truelight@193: 
richk@6719: 	/* means it is completed, get out. */
celestar@3426: 	if (LiftHasDestination(tile)) return;
truelight@0: 
richk@6719: 	/* progress in construction stages */
belugas@3432: 	IncHouseConstructionTick(tile);
belugas@3432: 	if (GetHouseConstructionTick(tile) != 0) return;
truelight@0: 
richk@6719: 	/* Check and/or  */
rubidium@6871: 	if (HasBit(GetHouseSpecs(GetHouseType(tile))->callback_mask, CBM_HOUSE_CONSTRUCTION_STATE_CHANGE)) {
richk@6720: 		uint16 callback_res = GetHouseCallback(CBID_HOUSE_CONSTRUCTION_STATE_CHANGE, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);
maedhros@6658: 		if (callback_res != CALLBACK_FAILED) ChangeHouseAnimationFrame(tile, callback_res);
maedhros@6658: 	}
truelight@0: 
maedhros@6658: 	if (IsHouseCompleted(tile)) {
maedhros@6658: 		/* Now that construction is complete, we can add the population of the
maedhros@6658: 		 * building to the town. */
maedhros@6658: 		ChangePopulation(GetTownByTile(tile), GetHouseSpecs(GetHouseType(tile))->population);
truelight@0: 	}
truelight@0: 	MarkTileDirtyByTile(tile);
truelight@0: }
truelight@0: 
richk@6719: /** Make the house advances in its construction stages until completion
richk@6719:  * @param tile TileIndex of house
richk@6719:  */
tron@1977: static void MakeTownHouseBigger(TileIndex tile)
truelight@0: {
maedhros@6658: 	uint flags = GetHouseSpecs(GetHouseType(tile))->building_flags;
maedhros@6658: 	if (flags & BUILDING_HAS_1_TILE)  MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 0));
maedhros@6658: 	if (flags & BUILDING_2_TILES_Y)   MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 1));
maedhros@6658: 	if (flags & BUILDING_2_TILES_X)   MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 0));
maedhros@6658: 	if (flags & BUILDING_HAS_4_TILES) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 1));
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Periodic tic handler for houses and town
richk@6719:  * @param tile been asked to do its stuff
richk@6719:  */
tron@1977: static void TileLoop_Town(TileIndex tile)
truelight@0: {
maedhros@6658: 	HouseID house_id = GetHouseType(tile);
truelight@0: 
maedhros@6658: 	/* NewHouseTileLoop returns false if Callback 21 succeeded, i.e. the house
maedhros@6658: 	 * doesn't exist any more, so don't continue here. */
maedhros@6658: 	if (house_id >= NEW_HOUSE_OFFSET && !NewHouseTileLoop(tile)) return;
maedhros@6658: 
maedhros@6658: 	if (!IsHouseCompleted(tile)) {
richk@6719: 		/* Construction is not completed. See if we can go further in construction*/
truelight@0: 		MakeTownHouseBigger(tile);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
richk@10184: 	const HouseSpec *hs = GetHouseSpecs(house_id);
richk@10184: 
maedhros@6658: 	/* If the lift has a destination, it is already an animated tile. */
richk@6719: 	if ((hs->building_flags & BUILDING_IS_ANIMATED) &&
richk@6719: 			house_id < NEW_HOUSE_OFFSET &&
richk@6719: 			!LiftHasDestination(tile) &&
richk@10184: 			Chance16(1, 2)) {
richk@6719: 		AddAnimatedTile(tile);
richk@10184: 	}
richk@10184: 
richk@10184: 	Town *t = GetTownByTile(tile);
richk@10184: 	uint32 r = Random();
truelight@0: 
rubidium@6871: 	if (HasBit(hs->callback_mask, CBM_HOUSE_PRODUCE_CARGO)) {
richk@6719: 		for (uint i = 0; i < 256; i++) {
richk@6719: 			uint16 callback = GetHouseCallback(CBID_HOUSE_PRODUCE_CARGO, i, r, house_id, t, tile);
richk@6719: 
rubidium@6872: 			if (callback == CALLBACK_FAILED || callback == CALLBACK_HOUSEPRODCARGO_END) break;
richk@6719: 
richk@6719: 			CargoID cargo = GetCargoTranslation(GB(callback, 8, 7), hs->grffile);
richk@6719: 			if (cargo == CT_INVALID) continue;
richk@6719: 
richk@6719: 			uint amt = GB(callback, 0, 8);
richk@6719: 			uint moved = MoveGoodsToStation(tile, 1, 1, cargo, amt);
richk@6719: 
richk@6719: 			const CargoSpec *cs = GetCargo(cargo);
richk@6719: 			switch (cs->town_effect) {
richk@6719: 				case TE_PASSENGERS:
richk@6719: 					t->new_max_pass += amt;
richk@6719: 					t->new_act_pass += moved;
richk@6719: 					break;
richk@6719: 
richk@6719: 				case TE_MAIL:
richk@6719: 					t->new_max_mail += amt;
richk@6719: 					t->new_act_mail += moved;
richk@6719: 					break;
richk@6719: 
richk@6719: 				default:
richk@6719: 					break;
richk@6719: 			}
richk@6719: 		}
richk@6719: 	} else {
richk@6719: 		if (GB(r, 0, 8) < hs->population) {
richk@6719: 			uint amt = GB(r, 0, 8) / 8 + 1;
richk@6719: 
richk@6719: 			if (_economy.fluct <= 0) amt = (amt + 1) >> 1;
richk@6719: 			t->new_max_pass += amt;
richk@10184: 			t->new_act_pass += MoveGoodsToStation(tile, 1, 1, CT_PASSENGERS, amt);
richk@6719: 		}
richk@6719: 
richk@6719: 		if (GB(r, 8, 8) < hs->mail_generation) {
richk@6719: 			uint amt = GB(r, 8, 8) / 8 + 1;
richk@6719: 
richk@6719: 			if (_economy.fluct <= 0) amt = (amt + 1) >> 1;
richk@6719: 			t->new_max_mail += amt;
richk@10184: 			t->new_act_mail += MoveGoodsToStation(tile, 1, 1, CT_MAIL, amt);
richk@6719: 		}
truelight@0: 	}
truelight@0: 
maedhros@6658: 	_current_player = OWNER_TOWN;
maedhros@6658: 
richk@6719: 	if (hs->building_flags & BUILDING_HAS_1_TILE &&
rubidium@6871: 			HasBit(t->flags12, TOWN_IS_FUNDED) &&
richk@6719: 			CanDeleteHouse(tile) &&
richk@6719: 			max(_cur_year - GetHouseConstructionYear(tile), 0) >= hs->minimum_life &&
richk@6719: 			--t->time_until_rebuild == 0) {
richk@6719: 		t->time_until_rebuild = GB(r, 16, 8) + 192;
truelight@0: 
truelight@0: 		ClearTownHouse(t, tile);
truelight@193: 
richk@6719: 		/* Rebuild with another house? */
richk@6878: 		if (GB(r, 24, 8) >= 12) BuildTownHouse(t, tile);
maedhros@6658: 	}
truelight@314: 
maedhros@6658: 	_current_player = OWNER_NONE;
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Unused handler
richk@6719:  * @param tile unused
richk@6719:  */
tron@1977: static void ClickTile_Town(TileIndex tile)
truelight@0: {
truelight@0: 	/* not used */
truelight@0: }
truelight@0: 
richk@6720: static CommandCost ClearTile_Town(TileIndex tile, byte flags)
truelight@0: {
richk@10184: 	if ((flags & DC_AUTO) && !(flags & DC_AI_BUILDING)) return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
richk@10184: 	if (!CanDeleteHouse(tile)) return CMD_ERROR;
richk@10184: 
richk@10184: 	const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
richk@10184: 
rubidium@6872: 	CommandCost cost(EXPENSES_CONSTRUCTION);
richk@6720: 	cost.AddCost(_price.remove_house * hs->removal_cost >> 8);
truelight@0: 
richk@10184: 	int rating = hs->remove_rating_decrease;
truelight@0: 	_cleared_town_rating += rating;
richk@10184: 	Town *t = _cleared_town = GetTownByTile(tile);
truelight@193: 
Darkvater@4850: 	if (IsValidPlayer(_current_player)) {
truelight@0: 		if (rating > t->ratings[_current_player] && !(flags & DC_NO_TOWN_RATING) && !_cheats.magic_bulldozer.value) {
tron@534: 			SetDParam(0, t->index);
truelight@0: 			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);
truelight@193: 		}
truelight@0: 	}
truelight@0: 
rubidium@6872: 	ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		ClearTownHouse(t, tile);
truelight@0: 	}
truelight@0: 
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
richk@10184: static void GetProducedCargo_Town(TileIndex tile, CargoID *b)
richk@10184: {
richk@10184: 	HouseID house_id = GetHouseType(tile);
richk@10184: 	const HouseSpec *hs = GetHouseSpecs(house_id);
richk@10184: 	Town *t = GetTownByTile(tile);
richk@10184: 
richk@10184: 	if (HasBit(hs->callback_mask, CBM_HOUSE_PRODUCE_CARGO)) {
richk@10184: 		for (uint i = 0; i < 256; i++) {
richk@10184: 			uint16 callback = GetHouseCallback(CBID_HOUSE_PRODUCE_CARGO, i, 0, house_id, t, tile);
richk@10184: 
richk@10184: 			if (callback == CALLBACK_FAILED || callback == CALLBACK_HOUSEPRODCARGO_END) break;
richk@10184: 
richk@10184: 			CargoID cargo = GetCargoTranslation(GB(callback, 8, 7), hs->grffile);
richk@10184: 
richk@10184: 			if (cargo == CT_INVALID) continue;
richk@10184: 			*(b++) = cargo;
richk@10184: 		}
richk@10184: 	} else {
richk@10184: 		if (hs->population > 0) {
richk@10184: 			*(b++) = CT_PASSENGERS;
richk@10184: 		}
richk@10184: 		if (hs->mail_generation > 0) {
richk@10184: 			*(b++) = CT_MAIL;
richk@10184: 		}
richk@10184: 	}
richk@10184: }
richk@10184: 
tron@1977: static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)
truelight@0: {
richk@10184: 	const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
richk@6719: 	CargoID accepts[3];
richk@6719: 
richk@6719: 	/* Set the initial accepted cargo types */
richk@6719: 	for (uint8 i = 0; i < lengthof(accepts); i++) {
richk@6719: 		accepts[i] = hs->accepts_cargo[i];
richk@6719: 	}
richk@6719: 
richk@6719: 	/* Check for custom accepted cargo types */
rubidium@6871: 	if (HasBit(hs->callback_mask, CBM_HOUSE_ACCEPT_CARGO)) {
richk@6719: 		uint16 callback = GetHouseCallback(CBID_HOUSE_ACCEPT_CARGO, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);
richk@6719: 		if (callback != CALLBACK_FAILED) {
richk@6719: 			/* Replace accepted cargo types with translated values from callback */
richk@6719: 			accepts[0] = GetCargoTranslation(GB(callback,  0, 5), hs->grffile);
richk@6719: 			accepts[1] = GetCargoTranslation(GB(callback,  5, 5), hs->grffile);
richk@6719: 			accepts[2] = GetCargoTranslation(GB(callback, 10, 5), hs->grffile);
richk@6719: 		}
richk@6719: 	}
richk@6719: 
richk@6719: 	/* Check for custom cargo acceptance */
rubidium@6871: 	if (HasBit(hs->callback_mask, CBM_HOUSE_CARGO_ACCEPTANCE)) {
richk@6719: 		uint16 callback = GetHouseCallback(CBID_HOUSE_CARGO_ACCEPTANCE, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);
richk@6719: 		if (callback != CALLBACK_FAILED) {
richk@6719: 			if (accepts[0] != CT_INVALID) ac[accepts[0]] = GB(callback, 0, 4);
richk@6719: 			if (accepts[1] != CT_INVALID) ac[accepts[1]] = GB(callback, 4, 4);
rubidium@6871: 			if (_opt.landscape != LT_TEMPERATE && HasBit(callback, 12)) {
richk@6719: 				/* The 'S' bit indicates food instead of goods */
richk@6719: 				ac[CT_FOOD] = GB(callback, 8, 4);
richk@6719: 			} else {
richk@6719: 				if (accepts[2] != CT_INVALID) ac[accepts[2]] = GB(callback, 8, 4);
richk@6719: 			}
richk@6719: 			return;
richk@6719: 		}
richk@6719: 	}
richk@6719: 
richk@6719: 	/* No custom acceptance, so fill in with the default values */
richk@6719: 	for (uint8 i = 0; i < lengthof(accepts); i++) {
richk@6719: 		if (accepts[i] != CT_INVALID) ac[accepts[i]] = hs->cargo_acceptance[i];
richk@6719: 	}
truelight@0: }
truelight@0: 
tron@1977: static void GetTileDesc_Town(TileIndex tile, TileDesc *td)
truelight@0: {
maedhros@6658: 	td->str = GetHouseSpecs(GetHouseType(tile))->building_name;
maedhros@6658: 	if (!IsHouseCompleted(tile)) {
tron@534: 		SetDParamX(td->dparam, 0, td->str);
truelight@0: 		td->str = STR_2058_UNDER_CONSTRUCTION;
truelight@0: 	}
truelight@0: 
truelight@0: 	td->owner = OWNER_TOWN;
truelight@0: }
truelight@0: 
richk@6878: static TrackStatus GetTileTrackStatus_Town(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
truelight@0: {
truelight@0: 	/* not used */
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
Darkvater@2436: static void ChangeTileOwner_Town(TileIndex tile, PlayerID old_player, PlayerID new_player)
truelight@0: {
truelight@0: 	/* not used */
truelight@0: }
truelight@0: 
tron@2817: static bool GrowTown(Town *t);
tron@2817: 
truelight@0: static void TownTickHandler(Town *t)
truelight@0: {
rubidium@6871: 	if (HasBit(t->flags12, TOWN_IS_FUNDED)) {
truelight@0: 		int i = t->grow_counter - 1;
truelight@0: 		if (i < 0) {
truelight@0: 			if (GrowTown(t)) {
truelight@0: 				i = t->growth_rate;
truelight@0: 			} else {
truelight@193: 				i = 0;
truelight@0: 			}
truelight@0: 		}
truelight@0: 		t->grow_counter = i;
truelight@0: 	}
truelight@0: 
truelight@0: 	UpdateTownRadius(t);
truelight@0: }
truelight@0: 
rubidium@6573: void OnTick_Town()
truelight@0: {
tron@2639: 	if (_game_mode == GM_EDITOR) return;
truelight@0: 
pasky@1451: 	/* Make sure each town's tickhandler invocation frequency is about the
pasky@1451: 	 * same - TOWN_GROWTH_FREQUENCY - independent on the number of towns. */
matthijs@5247: 	for (_cur_town_iter += GetMaxTownIndex() + 1;
pasky@1529: 	     _cur_town_iter >= TOWN_GROWTH_FREQUENCY;
pasky@1529: 	     _cur_town_iter -= TOWN_GROWTH_FREQUENCY) {
pasky@1517: 		uint32 i = _cur_town_ctr;
pasky@1451: 
matthijs@5247: 		if (++_cur_town_ctr > GetMaxTownIndex())
pasky@1448: 			_cur_town_ctr = 0;
truelight@1260: 
truelight@4352: 		if (IsValidTownID(i)) TownTickHandler(GetTown(i));
pasky@1448: 	}
truelight@0: }
truelight@0: 
rubidium@6870: /**
rubidium@6870:  * Return the RoadBits of a tile
rubidium@6870:  *
rubidium@6870:  * @note There are many other functions doing things like that.
rubidium@6870:  * @note Needs to be checked for needlessness.
rubidium@6870:  * @param tile The tile we want to analyse
rubidium@6870:  * @return The roadbits of the given tile
rubidium@6870:  */
rubidium@6870: static RoadBits GetTownRoadBits(TileIndex tile)
truelight@0: {
richk@6719: 	TrackBits b = GetAnyRoadTrackBits(tile, ROADTYPE_ROAD);
rubidium@5838: 	RoadBits r = ROAD_NONE;
tron@2639: 
richk@6720: 	if (b == TRACK_BIT_NONE) return r;
tron@3150: 	if (b & TRACK_BIT_X)     r |= ROAD_X;
tron@3150: 	if (b & TRACK_BIT_Y)     r |= ROAD_Y;
tron@3150: 	if (b & TRACK_BIT_UPPER) r |= ROAD_NE | ROAD_NW;
tron@3150: 	if (b & TRACK_BIT_LOWER) r |= ROAD_SE | ROAD_SW;
tron@3150: 	if (b & TRACK_BIT_LEFT)  r |= ROAD_NW | ROAD_SW;
tron@3150: 	if (b & TRACK_BIT_RIGHT) r |= ROAD_NE | ROAD_SE;
truelight@0: 	return r;
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Check if a neighboring tile has a road
richk@6719:  *
richk@6719:  * @param tile curent tile
richk@6719:  * @param dir target direction
richk@6719:  * @param dist_multi distance multiplyer
richk@6719:  * @return true if one of the neighboring tiles at the
rubidium@6870:  *  given distance is a road tile else false
richk@6719:  */
rubidium@6877: static bool IsNeighborRoadTile(TileIndex tile, const DiagDirection dir, uint dist_multi)
richk@6719: {
rubidium@6877: 	/* Lookup table for the used diff values */
rubidium@6877: 	const TileIndexDiff tid_lt[3] = {
rubidium@6877: 		TileOffsByDiagDir(ChangeDiagDir(dir, DIAGDIRDIFF_90RIGHT)),
rubidium@6877: 		TileOffsByDiagDir(ChangeDiagDir(dir, DIAGDIRDIFF_90LEFT)),
rubidium@6877: 		TileOffsByDiagDir(ReverseDiagDir(dir)),
rubidium@6877: 	};
rubidium@6870: 
rubidium@6870: 	/* We add 1 to the distance because we want to get 1 for
rubidium@6870: 	 * the min distance multiplyer and not 0.
rubidium@6870: 	 * Therefore we start at 4. The 4 is used because
rubidium@6877: 	 * there are 4 tiles per distance step to check. */
rubidium@6870: 	dist_multi = (dist_multi + 1) * 4;
rubidium@6870: 	for (uint pos = 4; pos < dist_multi; pos++) {
rubidium@6870: 		TileIndexDiff cur = 0;
rubidium@6870: 		/* For each even value of pos add the right TileIndexDiff
rubidium@6870: 		 * for each uneven value the left TileIndexDiff
rubidium@6877: 		 * for each with 2nd bit set (2,3,6,7,..) add the reversed TileIndexDiff */
rubidium@6870: 		cur += tid_lt[(pos & 1) ? 0 : 1];
rubidium@6870: 		if (pos & 2) cur += tid_lt[2];
rubidium@6870: 
rubidium@6870: 		cur = (uint)(pos / 4) * cur; // Multiply for the fitting distance
rubidium@6870: 		if (GetTownRoadBits(TILE_ADD(tile, cur)) & DiagDirToRoadBits((pos & 2) ? dir : ReverseDiagDir(dir))) return true;
rubidium@6870: 	}
rubidium@6870: 	return false;
richk@6719: }
richk@6719: 
rubidium@6870: /**
rubidium@6870:  * Check if a Road is allowed on a given tile
rubidium@6870:  *
richk@10184:  * @param t The current town
rubidium@6870:  * @param tile The target tile
rubidium@6870:  * @param dir The direction in which we want to extend the town
rubidium@6870:  * @return true if it is allowed else false
rubidium@6870:  */
richk@10184: static bool IsRoadAllowedHere(Town *t, TileIndex tile, DiagDirection dir)
truelight@0: {
rubidium@6877: 	if (TileX(tile) < 2 || TileX(tile) >= MapMaxX() || TileY(tile) < 2 || TileY(tile) >= MapMaxY()) return false;
richk@6720: 
rubidium@6870: 	Slope cur_slope, desired_slope;
truelight@0: 
tron@2639: 	for (;;) {
richk@6719: 		/* Check if there already is a road at this point? */
rubidium@6870: 		if (GetTownRoadBits(tile) == ROAD_NONE) {
rubidium@6877: 			/* No, try if we are able to build a road piece there.
rubidium@6877: 			 * If that fails clear the land, and if that fails exit.
richk@6719: 			 * This is to make sure that we can build a road here later. */
rubidium@6870: 			if (CmdFailed(DoCommand(tile, ((dir == DIAGDIR_NW || dir == DIAGDIR_SE) ? ROAD_X : ROAD_Y), 0, DC_AUTO, CMD_BUILD_ROAD)) &&
tron@3491: 					CmdFailed(DoCommand(tile, 0, 0, DC_AUTO, CMD_LANDSCAPE_CLEAR)))
truelight@0: 				return false;
truelight@0: 		}
truelight@0: 
rubidium@6870: 		cur_slope = GetTileSlope(tile, NULL);
rubidium@6870: 		if (cur_slope == SLOPE_FLAT) {
pasky@465: no_slope:
richk@6719: 			/* Tile has no slope */
richk@10184: 			switch (t->GetActiveLayout()) {
richk@6719: 				default: NOT_REACHED();
richk@6719: 
rubidium@6877: 				case TL_ORIGINAL: // Disallow the road if any neighboring tile has a road (distance: 1)
rubidium@6870: 					return !IsNeighborRoadTile(tile, dir, 1);
richk@6719: 
rubidium@6877: 				case TL_BETTER_ROADS: // Disallow the road if any neighboring tile has a road (distance: 1 and 2).
rubidium@6870: 					return !IsNeighborRoadTile(tile, dir, 2);
richk@6719: 			}
truelight@0: 		}
truelight@193: 
richk@6719: 		/* If the tile is not a slope in the right direction, then
richk@6719: 		 * maybe terraform some. */
rubidium@6871: 		desired_slope = (dir == DIAGDIR_NW || dir == DIAGDIR_SE) ? SLOPE_NW : SLOPE_NE;
rubidium@6870: 		if (desired_slope != cur_slope && ComplementSlope(desired_slope) != cur_slope) {
rubidium@6871: 			if (Chance16(1, 8)) {
rubidium@6871: 				CommandCost res = CMD_ERROR;
rubidium@6871: 				if (!_generating_world && Chance16(1, 10)) {
rubidium@6877: 					/* Note: Do not replace "^ SLOPE_ELEVATED" with ComplementSlope(). The slope might be steep. */
rubidium@6877: 					res = DoCommand(tile, Chance16(1, 16) ? cur_slope : cur_slope ^ SLOPE_ELEVATED, 0,
rubidium@6871: 							DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
tron@2639: 				}
rubidium@6871: 				if (CmdFailed(res) && Chance16(1, 3)) {
richk@6719: 					/* We can consider building on the slope, though. */
pasky@465: 					goto no_slope;
tron@2646: 				}
truelight@0: 			}
truelight@0: 			return false;
truelight@0: 		}
truelight@835: 		return true;
truelight@0: 	}
truelight@0: }
truelight@0: 
tron@1977: static bool TerraformTownTile(TileIndex tile, int edges, int dir)
truelight@0: {
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
richk@10184: 	CommandCost r = DoCommand(tile, edges, dir, DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
richk@10184: 	if (CmdFailed(r) || r.GetCost() >= (_price.terraform + 2) * 8) return false;
tron@3491: 	DoCommand(tile, edges, dir, DC_AUTO | DC_NO_WATER | DC_EXEC, CMD_TERRAFORM_LAND);
truelight@0: 	return true;
truelight@0: }
truelight@0: 
tron@1977: static void LevelTownLand(TileIndex tile)
truelight@0: {
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
richk@6719: 	/* Don't terraform if land is plain or if there's a house there. */
tron@3055: 	if (IsTileType(tile, MP_HOUSE)) return;
richk@10184: 	Slope tileh = GetTileSlope(tile, NULL);
tron@3636: 	if (tileh == SLOPE_FLAT) return;
truelight@0: 
richk@6719: 	/* First try up, then down */
rubidium@6877: 	if (!TerraformTownTile(tile, ~tileh & SLOPE_ELEVATED, 1)) {
rubidium@6877: 		TerraformTownTile(tile, tileh & SLOPE_ELEVATED, 0);
truelight@0: 	}
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Generate the RoadBits of a grid tile
richk@6719:  *
richk@6719:  * @param t current town
richk@6719:  * @param tile tile in reference to the town
rubidium@6870:  * @param dir The direction to which we are growing ATM
richk@6719:  * @return the RoadBit of the current tile regarding
richk@6719:  *  the selected town layout
richk@6719:  */
richk@10184: static RoadBits GetTownRoadGridElement(Town *t, TileIndex tile, DiagDirection dir)
richk@6719: {
richk@6719: 	/* align the grid to the downtown */
rubidium@6870: 	TileIndexDiffC grid_pos = TileIndexToTileIndexDiffC(t->xy, tile); // Vector from downtown to the tile
rubidium@6870: 	RoadBits rcmd = ROAD_NONE;
richk@6719: 
richk@10184: 	switch (t->GetActiveLayout()) {
richk@6719: 		default: NOT_REACHED();
richk@6719: 
richk@6719: 		case TL_2X2_GRID:
rubidium@6870: 			if ((grid_pos.x % 3) == 0) rcmd |= ROAD_Y;
rubidium@6870: 			if ((grid_pos.y % 3) == 0) rcmd |= ROAD_X;
richk@6719: 			break;
richk@6719: 
richk@6719: 		case TL_3X3_GRID:
rubidium@6870: 			if ((grid_pos.x % 4) == 0) rcmd |= ROAD_Y;
rubidium@6870: 			if ((grid_pos.y % 4) == 0) rcmd |= ROAD_X;
richk@6719: 			break;
richk@6719: 	}
richk@6719: 
rubidium@6870: 	/* Optimise only X-junctions */
rubidium@6871: 	if (rcmd != ROAD_ALL) return rcmd;
rubidium@6871: 
rubidium@6871: 	RoadBits rb_template;
rubidium@6871: 
rubidium@6871: 	switch (GetTileSlope(tile, NULL)) {
rubidium@6871: 		default:       rb_template = ROAD_ALL; break;
rubidium@6871: 		case SLOPE_W:  rb_template = ROAD_NW | ROAD_SW; break;
rubidium@6871: 		case SLOPE_SW: rb_template = ROAD_Y  | ROAD_SW; break;
rubidium@6871: 		case SLOPE_S:  rb_template = ROAD_SW | ROAD_SE; break;
rubidium@6871: 		case SLOPE_SE: rb_template = ROAD_X  | ROAD_SE; break;
rubidium@6871: 		case SLOPE_E:  rb_template = ROAD_SE | ROAD_NE; break;
rubidium@6871: 		case SLOPE_NE: rb_template = ROAD_Y  | ROAD_NE; break;
rubidium@6871: 		case SLOPE_N:  rb_template = ROAD_NE | ROAD_NW; break;
rubidium@6871: 		case SLOPE_NW: rb_template = ROAD_X  | ROAD_NW; break;
rubidium@6871: 		case SLOPE_STEEP_W:
rubidium@6871: 		case SLOPE_STEEP_S:
rubidium@6871: 		case SLOPE_STEEP_E:
rubidium@6871: 		case SLOPE_STEEP_N:
rubidium@6871: 			rb_template = ROAD_NONE;
rubidium@6871: 			break;
richk@6719: 	}
rubidium@6870: 
rubidium@6871: 	/* Stop if the template is compatible to the growth dir */
rubidium@6871: 	if (DiagDirToRoadBits(ReverseDiagDir(dir)) & rb_template) return rb_template;
rubidium@6871: 	/* If not generate a straight road in the direction of the growth */
rubidium@6871: 	return DiagDirToRoadBits(dir) | DiagDirToRoadBits(ReverseDiagDir(dir));
richk@6719: }
richk@6719: 
richk@6719: /**
rubidium@6870:  * Grows the town with an extra house.
rubidium@6870:  *  Check if there are enough neighbor house tiles
rubidium@6870:  *  next to the current tile. If there are enough
rubidium@6870:  *  add another house.
richk@6719:  *
rubidium@6870:  * @param t The current town
rubidium@6870:  * @param tile The target tile for the extra house
rubidium@6870:  * @return true if an extra house has been added
richk@6719:  */
rubidium@6870: static bool GrowTownWithExtraHouse(Town *t, TileIndex tile)
richk@6719: {
richk@6719: 	/* We can't look further than that. */
rubidium@6870: 	if (TileX(tile) < 2 || TileY(tile) < 2 || MapMaxX() <= TileX(tile) || MapMaxY() <= TileY(tile)) return false;
rubidium@6870: 
rubidium@6870: 	uint counter = 0; // counts the house neighbor tiles
rubidium@6870: 
rubidium@6870: 	/* Check the tiles E,N,W and S of the current tile for houses */
rubidium@6870: 	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
rubidium@6870: 
rubidium@6870: 		if (IsTileType(TileAddByDiagDir(tile, dir), MP_HOUSE)) counter++;
rubidium@6870: 
rubidium@6870: 		/* If there are enough neighbors stop here */
rubidium@6870: 		if (counter >= 3) {
rubidium@6870: 			if (BuildTownHouse(t, tile)) {
rubidium@6870: 				_grow_town_result = GROWTH_SUCCEED;
rubidium@6870: 				return true;
rubidium@6870: 			}
rubidium@6870: 			return false;
rubidium@6870: 		}
richk@6719: 	}
rubidium@6870: 	return false;
rubidium@6870: }
rubidium@6870: 
rubidium@6870: /**
rubidium@6870:  * Grows the town with a road piece.
rubidium@6870:  *
rubidium@6870:  * @param t The current town
rubidium@6870:  * @param tile The current tile
rubidium@6870:  * @param rcmd The RoadBits we want to build on the tile
rubidium@6870:  * @return true if the RoadBits have been added else false
rubidium@6870:  */
rubidium@6870: static bool GrowTownWithRoad(const Town *t, TileIndex tile, RoadBits rcmd)
rubidium@6870: {
rubidium@6870: 	if (CmdSucceeded(DoCommand(tile, rcmd, t->index, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD))) {
rubidium@6870: 		_grow_town_result = GROWTH_SUCCEED;
rubidium@6870: 		return true;
rubidium@6870: 	}
rubidium@6870: 	return false;
rubidium@6870: }
rubidium@6870: 
rubidium@6870: /**
rubidium@6870:  * Grows the town with a bridge.
rubidium@6870:  *  At first we check if a bridge is reasonable.
rubidium@6870:  *  If so we check if we are able to build it.
rubidium@6870:  *
rubidium@6870:  * @param t The current town
rubidium@6870:  * @param tile The current tile
rubidium@6871:  * @param bridge_dir The valid direction in which to grow a bridge
rubidium@6870:  * @return true if a bridge has been build else false
rubidium@6870:  */
rubidium@6877: static bool GrowTownWithBridge(const Town *t, const TileIndex tile, const DiagDirection bridge_dir)
rubidium@6870: {
rubidium@6871: 	assert(bridge_dir < DIAGDIR_END);
rubidium@6871: 
rubidium@6871: 	const Slope slope = GetTileSlope(tile, NULL);
rubidium@6871: 	if (slope == SLOPE_FLAT) return false; // no slope, no bridge
rubidium@6871: 
rubidium@6871: 	/* Make sure the direction is compatible with the slope.
rubidium@6877: 	 * Well we check if the slope has an up bit set in the
rubidium@6877: 	 * reverse direction. */
rubidium@6877: 	if (HASBITS(slope, InclinedSlope(bridge_dir))) return false;
rubidium@6871: 
rubidium@6871: 	/* Assure that the bridge is connectable to the start side */
rubidium@6871: 	if (!(GetTownRoadBits(TileAddByDiagDir(tile, ReverseDiagDir(bridge_dir))) & DiagDirToRoadBits(bridge_dir))) return false;
rubidium@6870: 
rubidium@6870: 	/* We are in the right direction */
rubidium@6877: 	uint8 bridge_length = 0;      // This value stores the length of the possible bridge
rubidium@6870: 	TileIndex bridge_tile = tile; // Used to store the other waterside
rubidium@6870: 
rubidium@6877: 	const int delta = TileOffsByDiagDir(bridge_dir);
rubidium@6870: 	do {
rubidium@6870: 		if (bridge_length++ >= 11) {
rubidium@6870: 			/* Max 11 tile long bridges */
rubidium@6870: 			return false;
richk@6719: 		}
rubidium@6871: 		bridge_tile += delta;
rubidium@6877: 	} while (TileX(bridge_tile) != 0 && TileY(bridge_tile) != 0 && IsWaterTile(bridge_tile));
rubidium@6870: 
rubidium@6870: 	/* no water tiles in between? */
rubidium@6870: 	if (bridge_length == 1) return false;
rubidium@6870: 
rubidium@6870: 	for (uint8 times = 0; times <= 22; times++) {
rubidium@6870: 		byte bridge_type = RandomRange(MAX_BRIDGES - 1);
rubidium@6870: 
rubidium@6870: 		/* Can we actually build the bridge? */
rubidium@6870: 		if (CmdSucceeded(DoCommand(tile, bridge_tile, bridge_type | ((0x80 | ROADTYPES_ROAD) << 8), DC_AUTO, CMD_BUILD_BRIDGE))) {
rubidium@6870: 			DoCommand(tile, bridge_tile, bridge_type | ((0x80 | ROADTYPES_ROAD) << 8), DC_EXEC | DC_AUTO, CMD_BUILD_BRIDGE);
rubidium@6870: 			_grow_town_result = GROWTH_SUCCEED;
richk@6719: 			return true;
richk@6719: 		}
richk@6719: 	}
rubidium@6870: 	/* Quit if it selecting an appropiate bridge type fails a large number of times. */
richk@6719: 	return false;
richk@6719: }
richk@6719: 
richk@6719: /**
richk@6719:  * Grows the given town.
richk@6719:  * There are at the moment 3 possible way's for
richk@6719:  * the town expansion:
rubidium@6870:  *  @li Generate a random tile and check if there is a road allowed
rubidium@6870:  *  @li TL_ORIGINAL
rubidium@6870:  *  @li TL_BETTER_ROADS
rubidium@6870:  *  @li Check if the town geometry allows a road and which one
rubidium@6870:  *  @li TL_2X2_GRID
rubidium@6870:  *  @li TL_3X3_GRID
rubidium@6870:  *  @li Forbid roads, only build houses
rubidium@6870:  *  @li TL_NO_ROADS
richk@6719:  *
rubidium@6870:  * @param tile_ptr The current tile
rubidium@6870:  * @param cur_rb The current tiles RoadBits
rubidium@6870:  * @param target_dir The target road dir
rubidium@6870:  * @param t1 The current town
richk@6719:  */
rubidium@6870: static void GrowTownInTile(TileIndex *tile_ptr, RoadBits cur_rb, DiagDirection target_dir, Town *t1)
truelight@0: {
rubidium@6870: 	RoadBits rcmd = ROAD_NONE;  // RoadBits for the road construction command
rubidium@6870: 	TileIndex tile = *tile_ptr; // The main tile on which we base our growth
truelight@0: 
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
rubidium@6870: 	if (cur_rb == ROAD_NONE) {
richk@6719: 		/* Tile has no road. First reset the status counter
richk@6719: 		 * to say that this is the last iteration. */
rubidium@6870: 		_grow_town_result = GROWTH_SEARCH_STOPPED;
truelight@0: 
richk@6719: 		/* Remove hills etc */
truelight@0: 		LevelTownLand(tile);
truelight@0: 
richk@6719: 		/* Is a road allowed here? */
richk@10184: 		switch (t1->GetActiveLayout()) {
richk@6719: 			default: NOT_REACHED();
richk@6719: 
richk@6719: 			case TL_NO_ROADS: /* Disallow Roads */
richk@6719: 				return;
richk@6719: 
richk@6719: 			case TL_3X3_GRID:
richk@6719: 			case TL_2X2_GRID:
rubidium@6870: 				rcmd = GetTownRoadGridElement(t1, tile, target_dir);
rubidium@6870: 				if (rcmd == ROAD_NONE) return;
richk@6719: 				break;
richk@6719: 
richk@6719: 			case TL_BETTER_ROADS:
richk@6719: 			case TL_ORIGINAL:
richk@10184: 				if (!IsRoadAllowedHere(t1, tile, target_dir)) return;
rubidium@6870: 
rubidium@6870: 				DiagDirection source_dir = ReverseDiagDir(target_dir);
rubidium@6870: 
rubidium@6871: 				if (Chance16(1, 4)) {
rubidium@6870: 					/* Randomize a new target dir */
rubidium@6870: 					do target_dir = RandomDiagDir(); while (target_dir == source_dir);
richk@6719: 				}
richk@6719: 
richk@10184: 				if (!IsRoadAllowedHere(t1, TileAddByDiagDir(tile, target_dir), target_dir)) {
richk@6719: 					/* A road is not allowed to continue the randomized road,
rubidium@6870: 					 *  return if the road we're trying to build is curved. */
rubidium@6870: 					if (target_dir != ReverseDiagDir(source_dir)) return;
richk@6719: 
richk@6719: 					/* Return if neither side of the new road is a house */
rubidium@6870: 					if (!IsTileType(TileAddByDiagDir(tile, ChangeDiagDir(target_dir, DIAGDIRDIFF_90RIGHT)), MP_HOUSE) &&
rubidium@6870: 							!IsTileType(TileAddByDiagDir(tile, ChangeDiagDir(target_dir, DIAGDIRDIFF_90LEFT)), MP_HOUSE)) {
richk@6719: 						return;
richk@6719: 					}
richk@6719: 
richk@6719: 					/* That means that the road is only allowed if there is a house
richk@6719: 					 *  at any side of the new road. */
richk@6719: 				}
richk@6719: 
rubidium@6870: 				rcmd = DiagDirToRoadBits(target_dir) | DiagDirToRoadBits(source_dir);
richk@6719: 				break;
tron@2637: 		}
truelight@0: 
rubidium@6870: 	} else if (target_dir < DIAGDIR_END && !(cur_rb & DiagDirToRoadBits(ReverseDiagDir(target_dir)))) {
richk@6719: 		/* Continue building on a partial road.
rubidium@6870: 		 * Should be allways OK, so we only generate
rubidium@6870: 		 * the fitting RoadBits */
rubidium@6870: 		_grow_town_result = GROWTH_SEARCH_STOPPED;
richk@6719: 
richk@10184: 		switch (t1->GetActiveLayout()) {
richk@6719: 			default: NOT_REACHED();
richk@6719: 
richk@6719: 			case TL_NO_ROADS: /* Disallow Roads */
truelight@0: 				return;
truelight@0: 
richk@6719: 			case TL_3X3_GRID:
richk@6719: 			case TL_2X2_GRID:
rubidium@6870: 			 	rcmd = GetTownRoadGridElement(t1, tile, target_dir);
richk@6719: 				break;
richk@6719: 
richk@6719: 			case TL_BETTER_ROADS:
richk@6719: 			case TL_ORIGINAL:
rubidium@6870: 				rcmd = DiagDirToRoadBits(ReverseDiagDir(target_dir));
richk@6719: 				break;
truelight@0: 		}
truelight@0: 	} else {
rubidium@6870: 		bool allow_house = false; // Value which decides if we want to construct a house
richk@6719: 
richk@6719: 		/* Reached a tunnel/bridge? Then continue at the other side of it. */
rubidium@5696: 		if (IsTileType(tile, MP_TUNNELBRIDGE)) {
rubidium@6872: 			if (GetTunnelBridgeTransportType(tile) == TRANSPORT_ROAD) {
rubidium@6872: 				*tile_ptr = GetOtherTunnelBridgeEnd(tile);
rubidium@5696: 			}
truelight@0: 			return;
truelight@0: 		}
truelight@193: 
richk@6719: 		/* Possibly extend the road in a direction.
richk@6719: 		 * Randomize a direction and if it has a road, bail out. */
rubidium@6870: 		target_dir = RandomDiagDir();
rubidium@6870: 		if (cur_rb & DiagDirToRoadBits(target_dir)) return;
truelight@0: 
richk@6719: 		/* This is the tile we will reach if we extend to this direction. */
rubidium@6870: 		TileIndex house_tile = TileAddByDiagDir(tile, target_dir); // position of a possible house
rubidium@6870: 
rubidium@6870: 		/* Don't walk into water. */
rubidium@6871: 		if (IsWaterTile(house_tile)) return;
truelight@0: 
richk@10184: 		switch (t1->GetActiveLayout()) {
richk@6719: 			default: NOT_REACHED();
richk@6719: 
richk@6719: 			case TL_NO_ROADS:
richk@6719: 				allow_house = true;
richk@6719: 				break;
richk@6719: 
richk@6719: 			case TL_3X3_GRID: /* Use 2x2 grid afterwards! */
rubidium@6870: 				GrowTownWithExtraHouse(t1, TileAddByDiagDir(house_tile, target_dir));
rubidium@6870: 				/* FALL THROUGH */
richk@6719: 
richk@6719: 			case TL_2X2_GRID:
rubidium@6870: 				rcmd = GetTownRoadGridElement(t1, house_tile, target_dir);
richk@6719: 				allow_house = (rcmd == ROAD_NONE);
richk@6719: 				break;
richk@6719: 
richk@6719: 			case TL_BETTER_ROADS: /* Use original afterwards! */
rubidium@6870: 				GrowTownWithExtraHouse(t1, TileAddByDiagDir(house_tile, target_dir));
rubidium@6870: 				/* FALL THROUGH */
richk@6719: 
richk@6719: 			case TL_ORIGINAL:
richk@6719: 				 /* Allow a house at the edge. 60% chance or
richk@6719: 				  * always ok if no road allowed. */
rubidium@6870: 				rcmd = DiagDirToRoadBits(target_dir);
richk@10184: 				allow_house = (!IsRoadAllowedHere(t1, house_tile, target_dir) || Chance16(6, 10));
richk@6719: 				break;
richk@6719: 		}
richk@6719: 
richk@6719: 		if (allow_house) {
richk@6719: 			/* Build a house, but not if there already is a house there. */
rubidium@6870: 			if (!IsTileType(house_tile, MP_HOUSE)) {
richk@6719: 				/* Level the land if possible */
rubidium@6871: 				if (Chance16(1, 6)) LevelTownLand(house_tile);
truelight@0: 
richk@6719: 				/* And build a house.
richk@6719: 				 * Set result to -1 if we managed to build it. */
rubidium@6870: 				if (BuildTownHouse(t1, house_tile)) {
rubidium@6870: 					_grow_town_result = GROWTH_SUCCEED;
richk@6719: 				}
truelight@0: 			}
truelight@0: 			return;
truelight@0: 		}
truelight@0: 
rubidium@6870: 		_grow_town_result = GROWTH_SEARCH_STOPPED;
truelight@0: 	}
truelight@0: 
richk@6719: 	/* Return if a water tile */
rubidium@6871: 	if (IsWaterTile(tile)) return;
truelight@0: 
rubidium@6870: 	/* Make the roads look nicer */
rubidium@6870: 	rcmd = CleanUpRoadBits(tile, rcmd);
rubidium@6870: 	if (rcmd == ROAD_NONE) return;
rubidium@6870: 
rubidium@6871: 	/* Only use the target direction for bridges to ensure they're connected.
rubidium@6871: 	 * The target_dir is as computed previously according to town layout, so
rubidium@6871: 	 * it will match it perfectly. */
rubidium@6871: 	if (GrowTownWithBridge(t1, tile, target_dir)) return;
rubidium@6870: 
rubidium@6870: 	GrowTownWithRoad(t1, tile, rcmd);
truelight@0: }
truelight@0: 
richk@6719: /** Returns "growth" if a house was built, or no if the build failed.
richk@6719:  * @param t town to inquiry
richk@6719:  * @param tile to inquiry
richk@6719:  * @return something other than zero(0)if town expansion was possible
richk@6719:  */
tron@1977: static int GrowTownAtRoad(Town *t, TileIndex tile)
truelight@0: {
rubidium@6870: 	/* Special case.
rubidium@6870: 	 * @see GrowTownInTile Check the else if
rubidium@6870: 	 */
rubidium@6870: 	DiagDirection target_dir = DIAGDIR_END; // The direction in which we want to extend the town
truelight@0: 
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
richk@6719: 	/* Number of times to search.
richk@6719: 	 * Better roads, 2X2 and 3X3 grid grow quite fast so we give
richk@6719: 	 * them a little handicap. */
richk@10184: 	switch (t->GetActiveLayout()) {
richk@6719: 		case TL_BETTER_ROADS:
richk@6719: 			_grow_town_result = 10 + t->num_houses * 2 / 9;
richk@6719: 			break;
richk@6719: 
richk@6719: 		case TL_3X3_GRID:
richk@6719: 		case TL_2X2_GRID:
richk@6719: 			_grow_town_result = 10 + t->num_houses * 1 / 9;
richk@6719: 			break;
richk@6719: 
richk@6719: 		default:
richk@6719: 			_grow_town_result = 10 + t->num_houses * 4 / 9;
richk@6719: 			break;
richk@6719: 	}
truelight@0: 
truelight@0: 	do {
rubidium@6870: 		RoadBits cur_rb = GetTownRoadBits(tile); // The RoadBits of the current tile
truelight@0: 
richk@6719: 		/* Try to grow the town from this point */
rubidium@6870: 		GrowTownInTile(&tile, cur_rb, target_dir, t);
richk@6719: 
richk@6719: 		/* Exclude the source position from the bitmask
richk@6719: 		 * and return if no more road blocks available */
rubidium@6870: 		cur_rb &= ~DiagDirToRoadBits(ReverseDiagDir(target_dir));
rubidium@6870: 		if (cur_rb == ROAD_NONE)
truelight@0: 			return _grow_town_result;
truelight@0: 
richk@6719: 		/* Select a random bit from the blockmask, walk a step
richk@6719: 		 * and continue the search from there. */
rubidium@6870: 		do target_dir = RandomDiagDir(); while (!(cur_rb & DiagDirToRoadBits(target_dir)));
rubidium@6870: 		tile = TileAddByDiagDir(tile, target_dir);
truelight@0: 
richk@6743: 		if (IsTileType(tile, MP_ROAD)) {
truelight@1327: 			/* Don't allow building over roads of other cities */
tron@4077: 			if (IsTileOwner(tile, OWNER_TOWN) && GetTownByTile(tile) != t) {
rubidium@6870: 				_grow_town_result = GROWTH_SUCCEED;
rubidium@6877: 			} else if (IsTileOwner(tile, OWNER_NONE) && _game_mode == GM_EDITOR) {
truelight@1327: 				/* If we are in the SE, and this road-piece has no town owner yet, it just found an
rubidium@4549: 				 * owner :) (happy happy happy road now) */
tron@1902: 				SetTileOwner(tile, OWNER_TOWN);
belugas@3432: 				SetTownIndex(tile, t->index);
truelight@1327: 			}
truelight@1327: 		}
truelight@1280: 
richk@6719: 		/* Max number of times is checked. */
truelight@0: 	} while (--_grow_town_result >= 0);
truelight@0: 
truelight@0: 	return (_grow_town_result == -2);
truelight@0: }
truelight@0: 
rubidium@6870: /**
rubidium@6870:  * Generate a random road block.
richk@6719:  * The probability of a straight road
rubidium@6870:  * is somewhat higher than a curved.
rubidium@6870:  *
rubidium@6870:  * @return A RoadBits value with 2 bits set
rubidium@6870:  */
rubidium@6573: static RoadBits GenRandomRoadBits()
truelight@0: {
truelight@0: 	uint32 r = Random();
tron@2140: 	uint a = GB(r, 0, 2);
tron@2140: 	uint b = GB(r, 8, 2);
truelight@0: 	if (a == b) b ^= 2;
rubidium@6870: 	return (RoadBits)((ROAD_NW << a) + (ROAD_NW << b));
truelight@0: }
truelight@0: 
richk@6719: /** Grow the town
richk@10184:  * @param t town to grow
richk@10184:  * @return true iff a house was built
richk@10184:  */
tron@2817: static bool GrowTown(Town *t)
truelight@0: {
rubidium@6870: 	/* Let the town be a ghost town
rubidium@6870: 	 * The player wanted it in such a way. Thus there he has it. ;)
rubidium@6870: 	 * Never reached in editor mode. */
rubidium@6870: 	if (_patches.town_layout == TL_NO_ROADS && _generating_world) {
rubidium@6870: 		return false;
rubidium@6870: 	}
truelight@0: 
tron@909: 	static const TileIndexDiffC _town_coord_mod[] = {
tron@909: 		{-1,  0},
tron@909: 		{ 1,  1},
tron@909: 		{ 1, -1},
tron@909: 		{-1, -1},
tron@909: 		{-1,  0},
tron@909: 		{ 0,  2},
tron@909: 		{ 2,  0},
tron@909: 		{ 0, -2},
tron@909: 		{-1, -1},
tron@909: 		{-2,  2},
tron@909: 		{ 2,  2},
tron@909: 		{ 2, -2},
tron@909: 		{ 0,  0}
truelight@0: 	};
richk@6719: 
richk@6719: 	/* Current player is a town */
rubidium@6870: 	PlayerID old_player = _current_player;
truelight@0: 	_current_player = OWNER_TOWN;
truelight@0: 
rubidium@6870: 	TileIndex tile = t->xy; // The tile we are working with ATM
rubidium@6870: 
richk@6719: 	/* Find a road that we can base the construction on. */
richk@10184: 	const TileIndexDiffC *ptr;
tron@909: 	for (ptr = _town_coord_mod; ptr != endof(_town_coord_mod); ++ptr) {
rubidium@6870: 		if (GetTownRoadBits(tile) != ROAD_NONE) {
truelight@260: 			int r = GrowTownAtRoad(t, tile);
truelight@260: 			_current_player = old_player;
rubidium@5838: 			return r != 0;
truelight@0: 		}
tron@909: 		tile = TILE_ADD(tile, ToTileIndexDiff(*ptr));
tron@909: 	}
truelight@0: 
richk@6719: 	/* No road available, try to build a random road block by
richk@6719: 	 * clearing some land and then building a road there. */
truelight@0: 	tile = t->xy;
tron@909: 	for (ptr = _town_coord_mod; ptr != endof(_town_coord_mod); ++ptr) {
truelight@4317: 		/* Only work with plain land that not already has a house */
truelight@4317: 		if (!IsTileType(tile, MP_HOUSE) && GetTileSlope(tile, NULL) == SLOPE_FLAT) {
richk@6720: 			if (CmdSucceeded(DoCommand(tile, 0, 0, DC_AUTO | DC_NO_WATER, CMD_LANDSCAPE_CLEAR))) {
tron@3491: 				DoCommand(tile, GenRandomRoadBits(), t->index, DC_EXEC | DC_AUTO, CMD_BUILD_ROAD);
truelight@260: 				_current_player = old_player;
truelight@0: 				return true;
truelight@0: 			}
truelight@0: 		}
tron@909: 		tile = TILE_ADD(tile, ToTileIndexDiff(*ptr));
tron@909: 	}
truelight@0: 
truelight@260: 	_current_player = old_player;
truelight@0: 	return false;
truelight@0: }
truelight@0: 
richk@10184: void UpdateTownRadius(Town *t)
truelight@0: {
truelight@0: 	static const uint16 _town_radius_data[23][5] = {
rubidium@4344: 		{  4,  0,  0,  0,  0}, // 0
rubidium@4344: 		{ 16,  0,  0,  0,  0},
rubidium@4344: 		{ 25,  0,  0,  0,  0},
rubidium@4344: 		{ 36,  0,  0,  0,  0},
rubidium@4344: 		{ 49,  0,  4,  0,  0},
rubidium@4344: 		{ 64,  0,  4,  0,  0}, // 20
rubidium@4344: 		{ 64,  0,  9,  0,  1},
rubidium@4344: 		{ 64,  0,  9,  0,  4},
rubidium@4344: 		{ 64,  0, 16,  0,  4},
rubidium@4344: 		{ 81,  0, 16,  0,  4},
rubidium@4344: 		{ 81,  0, 16,  0,  4}, // 40
rubidium@4344: 		{ 81,  0, 25,  0,  9},
rubidium@4344: 		{ 81, 36, 25,  0,  9},
rubidium@4344: 		{ 81, 36, 25, 16,  9},
rubidium@4344: 		{ 81, 49,  0, 25,  9},
rubidium@4344: 		{ 81, 64,  0, 25,  9}, // 60
rubidium@4344: 		{ 81, 64,  0, 36,  9},
rubidium@4344: 		{ 81, 64,  0, 36, 16},
pasky@470: 		{100, 81,  0, 49, 16},
pasky@470: 		{100, 81,  0, 49, 25},
pasky@470: 		{121, 81,  0, 49, 25}, // 80
pasky@470: 		{121, 81,  0, 49, 25},
pasky@470: 		{121, 81,  0, 49, 36}, // 88
truelight@0: 	};
pasky@470: 
pasky@470: 	if (t->num_houses < 92) {
pasky@470: 		memcpy(t->radius, _town_radius_data[t->num_houses / 4], sizeof(t->radius));
pasky@470: 	} else {
pasky@470: 		int mass = t->num_houses / 8;
richk@6719: 		/* At least very roughly extrapolate. Empirical numbers dancing between
richk@6719: 		 * overwhelming by cottages and skyscrapers outskirts. */
pasky@470: 		t->radius[0] = mass * mass;
richk@6719: 		/* Actually we are proportional to sqrt() but that's right because
richk@6719: 		 * we are covering an area. */
pasky@470: 		t->radius[1] = mass * 7;
pasky@470: 		t->radius[2] = 0;
pasky@470: 		t->radius[3] = mass * 4;
pasky@470: 		t->radius[4] = mass * 3;
pasky@470: 		//debug("%d (->%d): %d %d %d %d\n", t->num_houses, mass, t->radius[0], t->radius[1], t->radius[3], t->radius[4]);
pasky@470: 	}
truelight@0: }
truelight@0: 
pasky@1421: static bool CreateTownName(uint32 *townnameparts)
truelight@0: {
richk@6720: 	extern int _nb_orig_names;
truelight@0: 	Town *t2;
truelight@0: 	char buf1[64];
truelight@0: 	char buf2[64];
truelight@0: 	uint32 r;
pasky@1421: 	/* Do not set too low tries, since when we run out of names, we loop
pasky@1421: 	 * for #tries only one time anyway - then we stop generating more
pasky@1421: 	 * towns. Do not show it too high neither, since looping through all
pasky@1421: 	 * the other towns may take considerable amount of time (10000 is
pasky@1421: 	 * too much). */
pasky@1421: 	int tries = 1000;
richk@6720: 	bool grf = (_opt.town_name >= _nb_orig_names);
richk@6720: 	uint32 grfid = grf ? GetGRFTownNameId(_opt.town_name - _nb_orig_names) : 0;
richk@6720: 	uint16 townnametype = grf ? GetGRFTownNameType(_opt.town_name - _nb_orig_names) : SPECSTR_TOWNNAME_START + _opt.town_name;
truelight@0: 
richk@10184: 	assert(townnameparts != NULL);
truelight@0: 
tron@2952: 	for (;;) {
truelight@0: restart:
truelight@0: 		r = Random();
truelight@0: 
tron@534: 		SetDParam(0, r);
richk@6720: 		if (grf && grfid != 0) {
richk@6720: 			GRFTownNameGenerate(buf1, grfid, townnametype, r, lastof(buf1));
richk@6720: 		} else {
richk@6720: 			GetString(buf1, townnametype, lastof(buf1));
richk@6720: 		}
truelight@193: 
richk@6719: 		/* Check size and width */
Darkvater@4609: 		if (strlen(buf1) >= 31 || GetStringBoundingBox(buf1).width > 130) continue;
truelight@0: 
truelight@0: 		FOR_ALL_TOWNS(t2) {
richk@6719: 			/* We can't just compare the numbers since
richk@6719: 			 * several numbers may map to a single name. */
truelight@4346: 			SetDParam(0, t2->index);
Darkvater@4912: 			GetString(buf2, STR_TOWN, lastof(buf2));
truelight@4346: 			if (strcmp(buf1, buf2) == 0) {
truelight@4346: 				if (tries-- < 0) return false;
truelight@4346: 				goto restart;
truelight@0: 			}
truelight@0: 		}
pasky@1421: 		*townnameparts = r;
pasky@1421: 		return true;
truelight@0: 	}
truelight@0: }
truelight@0: 
celestar@1377: void UpdateTownMaxPass(Town *t)
truelight@0: {
truelight@0: 	t->max_pass = t->population >> 3;
truelight@0: 	t->max_mail = t->population >> 4;
truelight@0: }
truelight@0: 
richk@6719: /**
richk@6719:  * Does the actual town creation.
richk@6719:  *
richk@6719:  * @param t The town
richk@6719:  * @param tile Where to put it
richk@6719:  * @param townnameparts The town name
richk@6719:  * @param size_mode How the size should be determined
richk@6719:  * @param size Parameter for size determination
richk@6719:  */
richk@6719: static void DoCreateTown(Town *t, TileIndex tile, uint32 townnameparts, TownSizeMode size_mode, uint size)
truelight@0: {
richk@6720: 	extern int _nb_orig_names;
truelight@0: 
truelight@0: 	t->xy = tile;
truelight@0: 	t->num_houses = 0;
truelight@0: 	t->time_until_rebuild = 10;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 	t->flags12 = 0;
truelight@0: 	t->population = 0;
truelight@0: 	t->grow_counter = 0;
truelight@0: 	t->growth_rate = 250;
truelight@0: 	t->new_max_pass = 0;
truelight@0: 	t->new_max_mail = 0;
truelight@0: 	t->new_act_pass = 0;
truelight@0: 	t->new_act_mail = 0;
truelight@0: 	t->max_pass = 0;
truelight@0: 	t->max_mail = 0;
truelight@0: 	t->act_pass = 0;
truelight@0: 	t->act_mail = 0;
truelight@0: 
truelight@0: 	t->pct_pass_transported = 0;
truelight@0: 	t->pct_mail_transported = 0;
truelight@0: 	t->fund_buildings_months = 0;
truelight@0: 	t->new_act_food = 0;
darkvater@4: 	t->new_act_water = 0;
truelight@0: 	t->act_food = 0;
darkvater@4: 	t->act_water = 0;
truelight@0: 
richk@10184: 	for (uint i = 0; i != MAX_PLAYERS; i++) t->ratings[i] = RATING_INITIAL;
truelight@0: 
truelight@0: 	t->have_ratings = 0;
rubidium@5838: 	t->exclusivity = INVALID_PLAYER;
dominik@121: 	t->exclusive_counter = 0;
truelight@0: 	t->statues = 0;
truelight@0: 
richk@6720: 	if (_opt.town_name < _nb_orig_names) {
richk@6720: 		/* Original town name */
richk@6720: 		t->townnamegrfid = 0;
richk@6720: 		t->townnametype = SPECSTR_TOWNNAME_START + _opt.town_name;
richk@6720: 	} else {
richk@6720: 		/* Newgrf town name */
richk@6720: 		t->townnamegrfid = GetGRFTownNameId(_opt.town_name  - _nb_orig_names);
richk@6720: 		t->townnametype  = GetGRFTownNameType(_opt.town_name - _nb_orig_names);
richk@6720: 	}
pasky@1421: 	t->townnameparts = townnameparts;
truelight@193: 
truelight@0: 	UpdateTownVirtCoord(t);
truelight@0: 	_town_sort_dirty = true;
truelight@0: 
richk@10184: 	t->InitializeLayout();
richk@10184: 
richk@6719: 	/* Random town size. */
richk@10184: 	int x = (Random() & 0xF) + 8;
richk@6719: 
richk@6719: 	switch (size_mode) {
richk@6719: 		default: NOT_REACHED();
richk@6719: 
richk@6719: 		case TSM_RANDOM:
richk@6719: 			t->larger_town = false;
richk@6719: 			break;
richk@6719: 
richk@6719: 		case TSM_FIXED:
richk@6719: 			x = size * 16 + 3;
richk@6719: 			t->larger_town = false;
richk@6719: 			break;
richk@6719: 
richk@6719: 		case TSM_CITY:
richk@6719: 			x *= _patches.initial_city_size;
richk@6719: 			t->larger_town = true;
richk@6719: 			break;
celestar@3674: 	}
truelight@0: 
truelight@0: 	t->num_houses += x;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 
richk@10184: 	int i = x * 4;
truelight@0: 	do {
truelight@0: 		GrowTown(t);
truelight@0: 	} while (--i);
truelight@0: 
truelight@0: 	t->num_houses -= x;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 	UpdateTownMaxPass(t);
truelight@0: }
truelight@0: 
Darkvater@1793: /** Create a new town.
Darkvater@1793:  * This obviously only works in the scenario editor. Function not removed
Darkvater@1793:  * as it might be possible in the future to fund your own town :)
tron@3491:  * @param tile coordinates where town is built
richk@6719:  * @param flags type of operation
richk@6719:  * @param p1 size of the town (0 = small, 1 = medium, 2 = large)
richk@6719:  * @param p2 size mode (@see TownSizeMode)
Darkvater@1793:  */
richk@6720: CommandCost CmdBuildTown(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
Darkvater@1793: 	/* Only in the scenario editor */
Darkvater@1793: 	if (_game_mode != GM_EDITOR) return CMD_ERROR;
richk@6719: 	if (p2 > TSM_CITY) return CMD_ERROR;
Darkvater@1793: 
richk@6719: 	/* Check if too close to the edge of map */
tron@1245: 	if (DistanceFromEdge(tile) < 12)
truelight@0: 		return_cmd_error(STR_0237_TOO_CLOSE_TO_EDGE_OF_MAP);
truelight@0: 
richk@6719: 	/* Can only build on clear flat areas, possibly with trees. */
rubidium@5085: 	if ((!IsTileType(tile, MP_CLEAR) && !IsTileType(tile, MP_TREES)) || GetTileSlope(tile, NULL) != SLOPE_FLAT) {
truelight@0: 		return_cmd_error(STR_0239_SITE_UNSUITABLE);
tron@2986: 	}
truelight@0: 
richk@6719: 	/* Check distance to all other towns. */
truelight@0: 	if (IsCloseToTown(tile, 20))
truelight@0: 		return_cmd_error(STR_0238_TOO_CLOSE_TO_ANOTHER_TOWN);
truelight@0: 
richk@10184: 	uint32 townnameparts;
richk@10184: 
richk@6719: 	/* Get a unique name for the town. */
pasky@1421: 	if (!CreateTownName(&townnameparts))
pasky@1421: 		return_cmd_error(STR_023A_TOO_MANY_TOWNS);
pasky@1421: 
richk@6719: 	/* Allocate town struct */
richk@6743: 	Town *t = new Town(tile);
Darkvater@1793: 	if (t == NULL) return_cmd_error(STR_023A_TOO_MANY_TOWNS);
richk@6743: 	AutoPtrT<Town> t_auto_delete = t;
truelight@0: 
richk@6719: 	/* Create the town */
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		_generating_world = true;
richk@6719: 		DoCreateTown(t, tile, townnameparts, (TownSizeMode)p2, p1);
truelight@0: 		_generating_world = false;
richk@6743: 		t_auto_delete.Detach();
truelight@0: 	}
richk@6720: 	return CommandCost();
truelight@0: }
truelight@0: 
richk@6719: Town *CreateRandomTown(uint attempts, TownSizeMode mode, uint size)
truelight@0: {
truelight@0: 	do {
richk@6719: 		/* Generate a tile index not too close from the edge */
richk@10184: 		TileIndex tile = RandomTile();
tron@2951: 		if (DistanceFromEdge(tile) < 20) continue;
truelight@0: 
richk@6719: 		/* Make sure the tile is plain */
tron@3636: 		if (!IsTileType(tile, MP_CLEAR) || GetTileSlope(tile, NULL) != SLOPE_FLAT) continue;
truelight@0: 
richk@6719: 		/* Check not too close to a town */
tron@2951: 		if (IsCloseToTown(tile, 20)) continue;
truelight@193: 
richk@10184: 		uint32 townnameparts;
richk@10184: 
richk@6719: 		/* Get a unique name for the town. */
tron@2951: 		if (!CreateTownName(&townnameparts)) break;
pasky@1421: 
richk@6719: 		/* Allocate a town struct */
richk@10184: 		Town *t = new Town(tile);
tron@2951: 		if (t == NULL) break;
truelight@0: 
richk@6719: 		DoCreateTown(t, tile, townnameparts, mode, size);
truelight@0: 		return t;
richk@10184: 	} while (--attempts != 0);
richk@10184: 
truelight@0: 	return NULL;
truelight@0: }
truelight@0: 
richk@6719: static const byte _num_initial_towns[4] = {5, 11, 23, 46};
truelight@0: 
rubidium@6573: bool GenerateTowns()
truelight@0: {
celestar@1362: 	uint num = 0;
miham@6387: 	uint n = ScaleByMapSize(_num_initial_towns[_opt.diff.number_towns] + (Random() & 7));
richk@6719: 	uint num_cities = _patches.larger_towns == 0 ? 0 : n / _patches.larger_towns;
tron@1202: 
truelight@4300: 	SetGeneratingWorldProgress(GWP_TOWN, n);
truelight@4300: 
celestar@1362: 	do {
truelight@4300: 		IncreaseGeneratingWorldProgress(GWP_TOWN);
richk@6719: 		/* try 20 times to create a random-sized town for the first loop. */
richk@6719: 		TownSizeMode mode = num_cities > 0 ? TSM_CITY : TSM_RANDOM;
richk@6719: 		if (CreateRandomTown(20, mode, _patches.initial_city_size) != NULL) num++;
richk@6719: 		if (num_cities > 0) num_cities--;
celestar@1362: 	} while (--n);
celestar@1362: 
richk@6719: 	/* give it a last try, but now more aggressive */
richk@6719: 	if (num == 0 && CreateRandomTown(10000, TSM_RANDOM, 0) == NULL) {
matthijs@5247: 		if (GetNumTowns() == 0) {
truelight@4384: 			/* XXX - can we handle that more gracefully? */
truelight@4384: 			if (_game_mode != GM_EDITOR) error("Could not generate any town");
Darkvater@2430: 
truelight@4384: 			return false;
tron@4000: 		}
celestar@1362: 	}
Darkvater@2430: 
Darkvater@2430: 	return true;
truelight@0: }
truelight@0: 
truelight@0: 
rubidium@6872: /** Returns the bit corresponding to the town zone of the specified tile
rubidium@6872:  * @param t Town on which radius is to be found
rubidium@6872:  * @param tile TileIndex where radius needs to be found
rubidium@6872:  * @return the bit position of the given zone, as defined in HouseZones
rubidium@6872:  */
richk@10184: HouseZonesBits GetTownRadiusGroup(const Town *t, TileIndex tile)
truelight@0: {
tron@4000: 	uint dist = DistanceSquare(tile, t->xy);
truelight@0: 
rubidium@6872: 	if (t->fund_buildings_months && dist <= 25) return HZB_TOWN_CENTRE;
rubidium@6872: 
richk@10184: 	HouseZonesBits smallest = HZB_TOWN_EDGE;
richk@10184: 	for (HouseZonesBits i = HZB_BEGIN; i < HZB_END; i++) {
richk@10184: 		if (dist < t->radius[i]) smallest = i;
truelight@0: 	}
truelight@0: 
truelight@0: 	return smallest;
truelight@0: }
truelight@0: 
richk@6878: /**
richk@6878:  * Clears tile and builds a house or house part.
richk@6878:  * @param t tile index
richk@6878:  * @param tid Town index
richk@6878:  * @param counter of construction step
richk@6878:  * @param stage of construction (used for drawing)
richk@6878:  * @param type of house. Index into house specs array
richk@6878:  * @param random_bits required for newgrf houses
richk@6878:  * @pre house can be built here
richk@6878:  */
richk@6878: static inline void ClearMakeHouseTile(TileIndex tile, TownID tid, byte counter, byte stage, HouseID type, byte random_bits)
truelight@0: {
richk@6878: 	#if !defined(NDEBUG) || defined(WITH_ASSERT)
richk@6878: 		CommandCost cc =
richk@6878: 	#endif /* !defined(NDEBUG) || defined(WITH_ASSERT) */
richk@6878: 
richk@6878: 	DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_LANDSCAPE_CLEAR);
richk@6878: 
richk@6878: 	assert(CmdSucceeded(cc));
richk@6878: 
richk@6878: 	MakeHouseTile(tile, tid, counter, stage, type, random_bits);
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Write house information into the map. For houses > 1 tile, all tiles are marked.
richk@6878:  * @param t tile index
richk@6878:  * @param tid Town index
richk@6878:  * @param counter of construction step
richk@6878:  * @param stage of construction (used for drawing)
richk@6878:  * @param type of house. Index into house specs array
richk@6878:  * @param random_bits required for newgrf houses
richk@6878:  * @pre house can be built here
richk@6878:  */
richk@6878: static void MakeTownHouse(TileIndex t, TownID tid, byte counter, byte stage, HouseID type, byte random_bits)
richk@6878: {
richk@6878: 	BuildingFlags size = GetHouseSpecs(type)->building_flags;
richk@6878: 
richk@6878: 	ClearMakeHouseTile(t, tid, counter, stage, type, random_bits);
richk@6878: 	if (size & BUILDING_2_TILES_Y)   ClearMakeHouseTile(t + TileDiffXY(0, 1), tid, counter, stage, ++type, random_bits);
richk@6878: 	if (size & BUILDING_2_TILES_X)   ClearMakeHouseTile(t + TileDiffXY(1, 0), tid, counter, stage, ++type, random_bits);
richk@6878: 	if (size & BUILDING_HAS_4_TILES) ClearMakeHouseTile(t + TileDiffXY(1, 1), tid, counter, stage, ++type, random_bits);
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if a house can be built here. Important is slope, bridge above
richk@6878:  * and ability to clear the land.
richk@6878:  * @param tile tile to check
richk@6878:  * @param town town that is checking
richk@6878:  * @param noslope are slopes (foundations) allowed?
richk@6878:  * @return true iff house can be built here
richk@6878:  */
richk@6878: static inline bool CanBuildHouseHere(TileIndex tile, TownID town, bool noslope)
richk@6878: {
richk@6878: 	/* cannot build on these slopes... */
richk@6878: 	Slope slope = GetTileSlope(tile, NULL);
richk@6878: 	if ((noslope && slope != SLOPE_FLAT) || IsSteepSlope(slope)) return false;
richk@6878: 
richk@6878: 	/* building under a bridge? */
richk@6878: 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return false;
richk@6878: 
richk@6878: 	/* do not try to build over house owned by another town */
richk@6878: 	if (IsTileType(tile, MP_HOUSE) && GetTownIndex(tile) != town) return false;
richk@6878: 
richk@6878: 	/* can we clear the land? */
richk@6878: 	return CmdSucceeded(DoCommand(tile, 0, 0, DC_AUTO | DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if a house can be built at this tile, must have the same max z as parameter.
richk@6878:  * @param tile tile to check
richk@6878:  * @param town town that is checking
richk@6878:  * @param z max z of this tile so more parts of a house are at the same height (with foundation)
richk@6878:  * @param noslope are slopes (foundations) allowed?
richk@6878:  * @return true iff house can be built here
richk@6878:  * @see CanBuildHouseHere()
richk@6878:  */
richk@6878: static inline bool CheckBuildHouseSameZ(TileIndex tile, TownID town, uint z, bool noslope)
richk@6878: {
richk@6878: 	if (!CanBuildHouseHere(tile, town, noslope)) return false;
richk@6878: 
richk@6878: 	/* if building on slopes is allowed, there will be flattening foundation (to tile max z) */
richk@6878: 	if (GetTileMaxZ(tile) != z) return false;
richk@6878: 
richk@6878: 	return true;
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if a house of size 2x2 can be built at this tile
richk@6878:  * @param tile tile, N corner
richk@6878:  * @param town town that is checking
richk@6878:  * @param z maximum tile z so all tile have the same max z
richk@6878:  * @param noslope are slopes (foundations) allowed?
richk@6878:  * @return true iff house can be built
richk@6878:  * @see CheckBuildHouseSameZ()
richk@6878:  */
richk@6878: static bool CheckFree2x2Area(TileIndex tile, TownID town, uint z, bool noslope)
richk@6878: {
richk@6878: 	/* we need to check this tile too because we can be at different tile now */
richk@6878: 	if (!CheckBuildHouseSameZ(tile, town, z, noslope)) return false;
richk@6878: 
richk@6878: 	for (DiagDirection d = DIAGDIR_SE; d < DIAGDIR_END; d++) {
richk@6878: 		tile += TileOffsByDiagDir(d);
richk@6878: 		if (!CheckBuildHouseSameZ(tile, town, z, noslope)) return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if current town layout allows building here
richk@6878:  * @param t town
richk@6878:  * @param tile tile to check
richk@6878:  * @return true iff town layout allows building here
richk@6878:  * @note see layouts
richk@6878:  */
richk@6878: static inline bool TownLayoutAllowsHouseHere(Town *t, TileIndex tile)
truelight@0: {
richk@6878: 	TileIndexDiffC grid_pos = TileIndexToTileIndexDiffC(t->xy, tile);
richk@6878: 
richk@10184: 	switch (t->GetActiveLayout()) {
richk@6878: 		case TL_2X2_GRID:
richk@6878: 			if ((grid_pos.x % 3) == 0 || (grid_pos.y % 3) == 0) return false;
richk@6878: 			break;
richk@6878: 
richk@6878: 		case TL_3X3_GRID:
richk@6878: 			if ((grid_pos.x % 4) == 0 || (grid_pos.y % 4) == 0) return false;
richk@6878: 			break;
richk@6878: 
richk@6878: 		default:
richk@6878: 			break;
richk@6878: 	}
richk@6878: 
richk@6878: 	return true;
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if current town layout allows 2x2 building here
richk@6878:  * @param t town
richk@6878:  * @param tile tile to check
richk@6878:  * @return true iff town layout allows 2x2 building here
richk@6878:  * @note see layouts
richk@6878:  */
richk@6878: static inline bool TownLayoutAllows2x2HouseHere(Town *t, TileIndex tile)
richk@6878: {
richk@6878: 	/* MapSize() is sure dividable by both MapSizeX() and MapSizeY(),
richk@6878: 	 * so to do only one memory access, use MapSize() */
richk@6878: 	uint dx = MapSize() + TileX(t->xy) - TileX(tile);
richk@6878: 	uint dy = MapSize() + TileY(t->xy) - TileY(tile);
richk@6878: 
richk@10184: 	switch (t->GetActiveLayout()) {
richk@6878: 		case TL_2X2_GRID:
richk@6878: 			if ((dx % 3) != 0 || (dy % 3) != 0) return false;
richk@6878: 			break;
richk@6878: 
richk@6878: 		case TL_3X3_GRID:
richk@6878: 			if ((dx % 4) < 2 || (dy % 4) < 2) return false;
richk@6878: 			break;
richk@6878: 
richk@6878: 		default:
richk@6878: 			break;
richk@6878: 	}
richk@6878: 
richk@6878: 	return true;
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if 1x2 or 2x1 building is allowed here, also takes into account current town layout
richk@6878:  * Also, tests both building positions that occupy this tile
richk@6878:  * @param tile tile where the building should be built
richk@6878:  * @param t town
richk@6878:  * @param maxz all tiles should have the same height
richk@6878:  * @param noslope are slopes forbidden?
richk@6878:  * @param second diagdir from first tile to second tile
richk@6878:  **/
richk@6878: static bool CheckTownBuild2House(TileIndex *tile, Town *t, uint maxz, bool noslope, DiagDirection second)
richk@6878: {
richk@6878: 	/* 'tile' is already checked in BuildTownHouse() - CanBuildHouseHere() and slope test */
richk@6878: 
richk@6878: 	TileIndex tile2 = *tile + TileOffsByDiagDir(second);
richk@6878: 	if (TownLayoutAllowsHouseHere(t, tile2) && CheckBuildHouseSameZ(tile2, t->index, maxz, noslope)) return true;
richk@6878: 
richk@6878: 	tile2 = *tile + TileOffsByDiagDir(ReverseDiagDir(second));
richk@6878: 	if (TownLayoutAllowsHouseHere(t, tile2) && CheckBuildHouseSameZ(tile2, t->index, maxz, noslope)) {
richk@6878: 		*tile = tile2;
richk@6878: 		return true;
richk@6878: 	}
richk@6878: 
richk@6878: 	return false;
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Checks if 2x2 building is allowed here, also takes into account current town layout
richk@6878:  * Also, tests all four building positions that occupy this tile
richk@6878:  * @param tile tile where the building should be built
richk@6878:  * @param t town
richk@6878:  * @param maxz all tiles should have the same height
richk@6878:  * @param noslope are slopes forbidden?
richk@6878:  **/
richk@6878: static bool CheckTownBuild2x2House(TileIndex *tile, Town *t, uint maxz, bool noslope)
richk@6878: {
richk@6878: 	TileIndex tile2 = *tile;
richk@6878: 
richk@6878: 	for (DiagDirection d = DIAGDIR_SE;;d++) { // 'd' goes through DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_END
richk@6878: 		if (TownLayoutAllows2x2HouseHere(t, tile2) && CheckFree2x2Area(tile2, t->index, maxz, noslope)) {
richk@6878: 			*tile = tile2;
richk@6878: 			return true;
richk@6878: 		}
richk@6878: 		if (d == DIAGDIR_END) break;
richk@6878: 		tile2 += TileOffsByDiagDir(ReverseDiagDir(d)); // go clockwise
richk@6878: 	}
richk@6878: 
richk@6878: 	return false;
richk@6878: }
richk@6878: 
richk@6878: 
richk@6878: /**
richk@6878:  * Tries to build a house at this tile
richk@6878:  * @param t town the house will belong to
richk@6878:  * @param tile where the house will be built
richk@6878:  * @return false iff no house can be built at this tile
richk@6878:  */
richk@6878: static bool BuildTownHouse(Town *t, TileIndex tile)
richk@6878: {
richk@6878: 	/* forbidden building here by town layout */
richk@6878: 	if (!TownLayoutAllowsHouseHere(t, tile)) return false;
richk@6878: 
richk@6878: 	/* no house allowed at all, bail out */
richk@6878: 	if (!CanBuildHouseHere(tile, t->index, false)) return false;
richk@6878: 
tron@1335: 	uint z;
richk@6878: 	Slope slope = GetTileSlope(tile, &z);
truelight@0: 
rubidium@6872: 	/* Get the town zone type of the current tile, as well as the climate.
rubidium@6872: 	 * This will allow to easily compare with the specs of the new house to build */
richk@6878: 	HouseZonesBits rad = GetTownRadiusGroup(t, tile);
richk@6878: 
richk@6878: 	/* Above snow? */
richk@6878: 	int land = _opt.landscape;
richk@6878: 	if (land == LT_ARCTIC && z >= _opt.snow_line) land = -1;
richk@6878: 
richk@6878: 	uint bitmask = (1 << rad) + (1 << (land + 12));
truelight@0: 
richk@6719: 	/* bits 0-4 are used
richk@6719: 	 * bits 11-15 are used
richk@6719: 	 * bits 5-10 are not used. */
richk@6878: 	HouseID houses[HOUSE_MAX];
richk@6878: 	uint num = 0;
richk@6878: 	uint probs[HOUSE_MAX];
richk@6878: 	uint probability_max = 0;
richk@6878: 
richk@6878: 	/* Generate a list of all possible houses that can be built. */
richk@6878: 	for (uint i = 0; i < HOUSE_MAX; i++) {
richk@10184: 		const HouseSpec *hs = GetHouseSpecs(i);
richk@6878: 		/* Verify that the candidate house spec matches the current tile status */
richk@6878: 		if ((~hs->building_availability & bitmask) == 0 && hs->enabled) {
richk@6878: 			/* Without NewHouses, all houses have probability '1' */
richk@6878: 			uint cur_prob = (_loaded_newgrf_features.has_newhouses ? hs->probability : 1);
richk@6878: 			probability_max += cur_prob;
richk@6878: 			probs[num] = cur_prob;
richk@6878: 			houses[num++] = (HouseID)i;
richk@6878: 		}
richk@6878: 	}
richk@6878: 
richk@6878: 	uint maxz = GetTileMaxZ(tile);
richk@6878: 
richk@6878: 	while (probability_max > 0) {
richk@6878: 		uint r = RandomRange(probability_max);
richk@6878: 		uint i;
richk@6878: 		for (i = 0; i < num; i++) {
richk@6878: 			if (probs[i] > r) break;
richk@6878: 			r -= probs[i];
richk@6878: 		}
richk@6878: 
richk@6878: 		HouseID house = houses[i];
richk@6878: 		probability_max -= probs[i];
richk@6878: 
richk@6878: 		/* remove tested house from the set */
richk@6878: 		num--;
richk@6878: 		houses[i] = houses[num];
richk@6878: 		probs[i] = probs[num];
richk@6878: 
richk@10184: 		const HouseSpec *hs = GetHouseSpecs(house);
richk@6878: 
richk@6878: 		if (_loaded_newgrf_features.has_newhouses) {
richk@6878: 			if (hs->override != 0) {
richk@6878: 				house = hs->override;
richk@6878: 				hs = GetHouseSpecs(house);
richk@6878: 			}
richk@6878: 
richk@6878: 			if ((hs->extra_flags & BUILDING_IS_HISTORICAL) && !_generating_world) continue;
richk@6878: 
richk@6878: 			if (HasBit(hs->callback_mask, CBM_HOUSE_ALLOW_CONSTRUCTION)) {
richk@6878: 				uint16 callback_res = GetHouseCallback(CBID_HOUSE_ALLOW_CONSTRUCTION, 0, 0, house, t, tile);
richk@6878: 				if (callback_res != CALLBACK_FAILED && callback_res == 0) continue;
maedhros@6658: 			}
truelight@0: 		}
truelight@0: 
richk@6878: 		if (_cur_year < hs->min_date || _cur_year > hs->max_date) continue;
richk@6878: 
richk@6878: 		/* Special houses that there can be only one of. */
richk@6878: 		uint oneof = 0;
richk@6878: 
richk@6878: 		if (hs->building_flags & BUILDING_IS_CHURCH) {
richk@6878: 			SetBit(oneof, TOWN_HAS_CHURCH);
richk@6878: 		} else if (hs->building_flags & BUILDING_IS_STADIUM) {
richk@6878: 			SetBit(oneof, TOWN_HAS_STADIUM);
truelight@0: 		}
richk@6878: 
richk@6878: 		if (HASBITS(t->flags12 , oneof)) continue;
richk@6878: 
richk@6878: 		/* Make sure there is no slope? */
richk@6878: 		bool noslope = (hs->building_flags & TILE_NOT_SLOPED) != 0;
richk@6878: 		if (noslope && slope != SLOPE_FLAT) continue;
richk@6878: 
richk@6878: 		if (hs->building_flags & TILE_SIZE_2x2) {
richk@6878: 			if (!CheckTownBuild2x2House(&tile, t, maxz, noslope)) continue;
richk@6878: 		} else if (hs->building_flags & TILE_SIZE_2x1) {
richk@6878: 			if (!CheckTownBuild2House(&tile, t, maxz, noslope, DIAGDIR_SW)) continue;
richk@6878: 		} else if (hs->building_flags & TILE_SIZE_1x2) {
richk@6878: 			if (!CheckTownBuild2House(&tile, t, maxz, noslope, DIAGDIR_SE)) continue;
richk@6878: 		} else {
richk@6878: 			/* 1x1 house checks are already done */
richk@6878: 		}
richk@6878: 
richk@6878: 		/* build the house */
richk@6878: 		t->num_houses++;
richk@6878: 		IncreaseBuildingCount(t, house);
richk@6878: 
richk@6878: 		/* Special houses that there can be only one of. */
richk@6878: 		t->flags12 |= oneof;
richk@6878: 
richk@6878: 		byte construction_counter = 0;
richk@6878: 		byte construction_stage = 0;
truelight@0: 
truelight@0: 		if (_generating_world) {
truelight@0: 			uint32 r = Random();
truelight@193: 
belugas@3432: 			construction_stage = TOWN_HOUSE_COMPLETED;
rubidium@6871: 			if (Chance16(1, 7)) construction_stage = GB(r, 0, 2);
truelight@0: 
belugas@3432: 			if (construction_stage == TOWN_HOUSE_COMPLETED) {
maedhros@6658: 				ChangePopulation(t, hs->population);
celestar@3382: 			} else {
celestar@3382: 				construction_counter = GB(r, 2, 2);
celestar@3382: 			}
truelight@0: 		}
richk@6878: 
rubidium@6872: 		MakeTownHouse(tile, t->index, construction_counter, construction_stage, house, Random());
richk@6878: 
richk@6878: 		return true;
truelight@0: 	}
richk@6878: 
richk@6878: 	return false;
truelight@0: }
truelight@0: 
truelight@0: 
tron@1977: static void DoClearTownHouseHelper(TileIndex tile)
truelight@0: {
tron@1035: 	assert(IsTileType(tile, MP_HOUSE));
truelight@0: 	DoClearSquare(tile);
truelight@0: 	DeleteAnimatedTile(tile);
truelight@0: }
truelight@0: 
maedhros@6658: void ClearTownHouse(Town *t, TileIndex tile)
tron@1977: {
richk@10184: 	assert(IsTileType(tile, MP_HOUSE));
richk@10184: 
maedhros@6658: 	HouseID house = GetHouseType(tile);
truelight@0: 
richk@6719: 	/* need to align the tile to point to the upper left corner of the house */
truelight@0: 	if (house >= 3) { // house id 0,1,2 MUST be single tile houses, or this code breaks.
maedhros@6658: 		if (GetHouseSpecs(house-1)->building_flags & TILE_SIZE_2x1) {
truelight@0: 			house--;
tron@1981: 			tile += TileDiffXY(-1, 0);
maedhros@6658: 		} else if (GetHouseSpecs(house-1)->building_flags & BUILDING_2_TILES_Y) {
truelight@0: 			house--;
tron@1981: 			tile += TileDiffXY(0, -1);
maedhros@6658: 		} else if (GetHouseSpecs(house-2)->building_flags & BUILDING_HAS_4_TILES) {
truelight@0: 			house-=2;
tron@1981: 			tile += TileDiffXY(-1, 0);
maedhros@6658: 		} else if (GetHouseSpecs(house-3)->building_flags & BUILDING_HAS_4_TILES) {
truelight@0: 			house-=3;
tron@1981: 			tile += TileDiffXY(-1, -1);
truelight@0: 		}
truelight@0: 	}
truelight@193: 
richk@10184: 	const HouseSpec *hs = GetHouseSpecs(house);
maedhros@6658: 
richk@6719: 	/* Remove population from the town if the house is finished. */
maedhros@6658: 	if (IsHouseCompleted(tile)) {
maedhros@6658: 		ChangePopulation(t, -hs->population);
truelight@0: 	}
truelight@0: 
truelight@0: 	t->num_houses--;
maedhros@6658: 	DecreaseBuildingCount(t, house);
truelight@0: 
richk@6719: 	/* Clear flags for houses that only may exist once/town. */
maedhros@6658: 	if (hs->building_flags & BUILDING_IS_CHURCH) {
rubidium@6871: 		ClrBit(t->flags12, TOWN_HAS_CHURCH);
maedhros@6658: 	} else if (hs->building_flags & BUILDING_IS_STADIUM) {
rubidium@6871: 		ClrBit(t->flags12, TOWN_HAS_STADIUM);
tron@483: 	}
truelight@193: 
richk@6719: 	/* Do the actual clearing of tiles */
richk@10184: 	uint eflags = hs->building_flags;
truelight@0: 	DoClearTownHouseHelper(tile);
maedhros@6658: 	if (eflags & BUILDING_2_TILES_X)   DoClearTownHouseHelper(tile + TileDiffXY(1, 0));
maedhros@6658: 	if (eflags & BUILDING_2_TILES_Y)   DoClearTownHouseHelper(tile + TileDiffXY(0, 1));
maedhros@6658: 	if (eflags & BUILDING_HAS_4_TILES) DoClearTownHouseHelper(tile + TileDiffXY(1, 1));
truelight@0: }
truelight@0: 
richk@6720: static bool IsUniqueTownName(const char *name)
richk@6720: {
richk@6720: 	const Town *t;
richk@6720: 	char buf[512];
richk@6720: 
richk@6720: 	FOR_ALL_TOWNS(t) {
richk@6720: 		SetDParam(0, t->index);
richk@6720: 		GetString(buf, STR_TOWN, lastof(buf));
richk@6720: 		if (strcmp(buf, name) == 0) return false;
richk@6720: 	}
richk@6720: 
richk@6720: 	return true;
richk@6720: }
richk@6720: 
Darkvater@1793: /** Rename a town (server-only).
tron@3491:  * @param tile unused
richk@6719:  * @param flags type of operation
Darkvater@1793:  * @param p1 town ID to rename
Darkvater@1793:  * @param p2 unused
Darkvater@1793:  */
richk@6720: CommandCost CmdRenameTown(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
richk@6720: 	if (!IsValidTownID(p1) || StrEmpty(_cmd_text)) return CMD_ERROR;
Darkvater@1793: 
richk@6720: 	if (!IsUniqueTownName(_cmd_text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);
richk@6720: 
truelight@0: 	if (flags & DC_EXEC) {
richk@10184: 		Town *t = GetTown(p1);
richk@10184: 
rubidium@6872: 		free(t->name);
rubidium@6872: 		t->name = strdup(_cmd_text);
truelight@0: 
truelight@0: 		UpdateTownVirtCoord(t);
truelight@0: 		_town_sort_dirty = true;
truelight@0: 		UpdateAllStationVirtCoord();
rubidium@6871: 		UpdateAllWaypointSigns();
truelight@0: 		MarkWholeScreenDirty();
truelight@0: 	}
richk@6720: 	return CommandCost();
truelight@0: }
truelight@0: 
richk@6719: /** Called from GUI */
truelight@0: void ExpandTown(Town *t)
truelight@0: {
truelight@0: 	_generating_world = true;
truelight@193: 
truelight@835: 	/* The more houses, the faster we grow */
richk@10184: 	uint amount = RandomRange(ClampToU16(t->num_houses / 10)) + 3;
truelight@0: 	t->num_houses += amount;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 
richk@10184: 	uint n = amount * 10;
truelight@0: 	do GrowTown(t); while (--n);
truelight@0: 
truelight@0: 	t->num_houses -= amount;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 
truelight@0: 	UpdateTownMaxPass(t);
truelight@0: 	_generating_world = false;
truelight@0: }
truelight@0: 
rubidium@5838: extern const byte _town_action_costs[8] = {
truelight@0: 	2, 4, 9, 35, 48, 53, 117, 175
truelight@0: };
truelight@0: 
richk@10184: static void TownActionAdvertiseSmall(Town *t)
truelight@0: {
tron@3877: 	ModifyStationRatingAround(t->xy, _current_player, 0x40, 10);
truelight@0: }
truelight@0: 
richk@10184: static void TownActionAdvertiseMedium(Town *t)
tron@3877: {
tron@3877: 	ModifyStationRatingAround(t->xy, _current_player, 0x70, 15);
tron@3877: }
tron@3877: 
richk@10184: static void TownActionAdvertiseLarge(Town *t)
tron@3877: {
tron@3877: 	ModifyStationRatingAround(t->xy, _current_player, 0xA0, 20);
tron@3877: }
tron@3877: 
richk@10184: static void TownActionRoadRebuild(Town *t)
truelight@0: {
truelight@0: 	t->road_build_months = 6;
truelight@193: 
tron@534: 	SetDParam(0, t->index);
richk@6720: 	SetDParam(1, _current_player);
truelight@0: 
truelight@193: 	AddNewsItem(STR_2055_TRAFFIC_CHAOS_IN_ROAD_REBUILDING,
richk@10184: 		NM_NORMAL, NF_TILE, NT_GENERAL, DNC_NONE, t->xy, 0);
truelight@0: }
truelight@0: 
truelight@6583: static bool DoBuildStatueOfCompany(TileIndex tile, TownID town_id)
truelight@0: {
rubidium@6870: 	/* Statues can be build on slopes, just like houses. Only the steep slopes is a no go. */
rubidium@6870: 	if (IsSteepSlope(GetTileSlope(tile, NULL))) return false;
truelight@0: 
tron@2986: 	if (!IsTileType(tile, MP_HOUSE) &&
tron@2986: 			!IsTileType(tile, MP_CLEAR) &&
tron@2986: 			!IsTileType(tile, MP_TREES)) {
truelight@0: 		return false;
tron@2986: 	}
truelight@0: 
richk@10184: 	PlayerID old = _current_player;
truelight@0: 	_current_player = OWNER_NONE;
richk@10184: 	CommandCost r = DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@0: 	_current_player = old;
truelight@0: 
tron@2646: 	if (CmdFailed(r)) return false;
truelight@0: 
truelight@6583: 	MakeStatue(tile, _current_player, town_id);
tron@3310: 	MarkTileDirtyByTile(tile);
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
belugas@5118: /**
belugas@5118:  * Search callback function for TownActionBuildStatue
richk@6719:  * @param tile on which to perform the search
truelight@6583:  * @param town_id The town_id for which we want a statue
belugas@6527:  * @return the result of the test
belugas@5118:  */
truelight@6583: static bool SearchTileForStatue(TileIndex tile, uint32 town_id)
belugas@5118: {
truelight@6583: 	return DoBuildStatueOfCompany(tile, town_id);
belugas@5118: }
belugas@5118: 
belugas@5118: /**
belugas@5118:  * Perform a 9x9 tiles circular search from the center of the town
belugas@5118:  * in order to find a free tile to place a statue
belugas@5118:  * @param t town to search in
belugas@5118:  */
richk@10184: static void TownActionBuildStatue(Town *t)
truelight@0: {
tron@1977: 	TileIndex tile = t->xy;
truelight@0: 
richk@10184: 	if (CircularTileSearch(tile, 9, SearchTileForStatue, t->index)) {
rubidium@6871: 		SetBit(t->statues, _current_player); // Once found and built, "inform" the Town
richk@10184: 	}
truelight@0: }
truelight@0: 
richk@10184: static void TownActionFundBuildings(Town *t)
truelight@0: {
richk@6719: 	/* Build next tick */
truelight@0: 	t->grow_counter = 1;
richk@6719: 	/* If we were not already growing */
rubidium@6871: 	SetBit(t->flags12, TOWN_IS_FUNDED);
richk@6719: 	/* And grow for 3 months */
truelight@0: 	t->fund_buildings_months = 3;
truelight@0: }
truelight@0: 
richk@10184: static void TownActionBuyRights(Town *t)
truelight@0: {
rubidium@6870: 	/* Check if it's allowed to by the rights */
rubidium@6870: 	if (!_patches.exclusive_rights) return;
rubidium@6870: 
dominik@121: 	t->exclusive_counter = 12;
dominik@121: 	t->exclusivity = _current_player;
truelight@0: 
truelight@0: 	ModifyStationRatingAround(t->xy, _current_player, 130, 17);
truelight@0: }
truelight@0: 
richk@10184: static void TownActionBribe(Town *t)
truelight@0: {
richk@10184: 	if (Chance16(1, 14)) {
richk@6719: 		/* set as unwanted for 6 months */
truelight@0: 		t->unwanted[_current_player] = 6;
truelight@0: 
richk@6719: 		/* set all close by station ratings to 0 */
richk@10184: 		Station *st;
truelight@0: 		FOR_ALL_STATIONS(st) {
truelight@0: 			if (st->town == t && st->owner == _current_player) {
peter1138@6676: 				for (CargoID i = 0; i < NUM_CARGO; i++) st->goods[i].rating = 0;
truelight@0: 			}
truelight@0: 		}
truelight@0: 
richk@6719: 		/* only show errormessage to the executing player. All errors are handled command.c
richk@6719: 		 * but this is special, because it can only 'fail' on a DC_EXEC */
Darkvater@2425: 		if (IsLocalPlayer()) ShowErrorMessage(STR_BRIBE_FAILED_2, STR_BRIBE_FAILED, 0, 0);
truelight@0: 
rubidium@4434: 		/* decrease by a lot!
rubidium@4434: 		 * ChangeTownRating is only for stuff in demolishing. Bribe failure should
rubidium@4434: 		 * be independent of any cheat settings
truelight@0: 		 */
tron@2549: 		if (t->ratings[_current_player] > RATING_BRIBE_DOWN_TO) {
celestar@1005: 			t->ratings[_current_player] = RATING_BRIBE_DOWN_TO;
tron@2549: 		}
truelight@0: 	} else {
celestar@1005: 		ChangeTownRating(t, RATING_BRIBE_UP_STEP, RATING_BRIBE_MAXIMUM);
truelight@0: 	}
truelight@0: }
truelight@0: 
richk@10184: typedef void TownActionProc(Town *t);
richk@10184: static TownActionProc *const _town_action_proc[] = {
tron@3877: 	TownActionAdvertiseSmall,
tron@3877: 	TownActionAdvertiseMedium,
tron@3877: 	TownActionAdvertiseLarge,
truelight@0: 	TownActionRoadRebuild,
truelight@0: 	TownActionBuildStatue,
truelight@0: 	TownActionFundBuildings,
truelight@0: 	TownActionBuyRights,
truelight@0: 	TownActionBribe
truelight@0: };
truelight@0: 
Darkvater@1793: extern uint GetMaskOfTownActions(int *nump, PlayerID pid, const Town *t);
Darkvater@1793: 
Darkvater@1793: /** Do a town action.
Darkvater@1793:  * This performs an action such as advertising, building a statue, funding buildings,
Darkvater@1793:  * but also bribing the town-council
tron@3491:  * @param tile unused
richk@6719:  * @param flags type of operation
Darkvater@1793:  * @param p1 town to do the action at
Darkvater@1793:  * @param p2 action to perform, @see _town_action_proc for the list of available actions
Darkvater@1793:  */
richk@6720: CommandCost CmdDoTownAction(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@4352: 	if (!IsValidTownID(p1) || p2 > lengthof(_town_action_proc)) return CMD_ERROR;
Darkvater@1793: 
richk@10184: 	Town *t = GetTown(p1);
Darkvater@1793: 
rubidium@6871: 	if (!HasBit(GetMaskOfTownActions(NULL, _current_player, t), p2)) return CMD_ERROR;
truelight@0: 
rubidium@6872: 	CommandCost cost(EXPENSES_OTHER, (_price.build_industry >> 8) * _town_action_costs[p2]);
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
tron@3877: 		_town_action_proc[p2](t);
truelight@0: 		InvalidateWindow(WC_TOWN_AUTHORITY, p1);
truelight@0: 	}
truelight@0: 
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
truelight@0: static void UpdateTownGrowRate(Town *t)
truelight@0: {
richk@10184: 	/* Increase player ratings if they're low */
richk@10184: 	const Player *p;
truelight@0: 	FOR_ALL_PLAYERS(p) {
richk@10184: 		if (p->is_active) {
richk@10184: 			t->ratings[p->index] = min((int)RATING_GROWTH_MAXIMUM, t->ratings[p->index] + RATING_GROWTH_UP_STEP);
truelight@0: 		}
truelight@0: 	}
truelight@0: 
richk@10184: 	int n = 0;
richk@10184: 
richk@10184: 	const Station *st;
truelight@0: 	FOR_ALL_STATIONS(st) {
tron@1245: 		if (DistanceSquare(st->xy, t->xy) <= t->radius[0]) {
truelight@0: 			if (st->time_since_load <= 20 || st->time_since_unload <= 20) {
truelight@0: 				n++;
richk@10184: 				if (IsValidPlayer(st->owner)) {
richk@10184: 					int new_rating = t->ratings[st->owner] + RATING_STATION_UP_STEP;
richk@10184: 					t->ratings[st->owner] = min(new_rating, INT16_MAX); // do not let it overflow
richk@10184: 				}
truelight@0: 			} else {
richk@10184: 				if (IsValidPlayer(st->owner)) {
richk@10184: 					int new_rating = t->ratings[st->owner] + RATING_STATION_DOWN_STEP;
richk@10184: 					t->ratings[st->owner] = max(new_rating, INT16_MIN);
richk@10184: 				}
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: 
richk@10184: 	/* clamp all ratings to valid values */
richk@10184: 	for (uint i = 0; i < MAX_PLAYERS; i++) {
richk@10184: 		t->ratings[i] = Clamp(t->ratings[i], RATING_MINIMUM, RATING_MAXIMUM);
richk@10184: 	}
richk@10184: 
rubidium@6871: 	ClrBit(t->flags12, TOWN_IS_FUNDED);
richk@6719: 	if (_patches.town_growth_rate == 0 && t->fund_buildings_months == 0) return;
richk@6719: 
richk@6719: 	/** Towns are processed every TOWN_GROWTH_FREQUENCY ticks, and this is the
richk@6719: 	 * number of times towns are processed before a new building is built. */
richk@6719: 	static const uint16 _grow_count_values[2][6] = {
rubidium@6870: 		{ 120, 120, 120, 100,  80,  60 }, // Fund new buildings has been activated
rubidium@6870: 		{ 320, 420, 300, 220, 160, 100 }  // Normal values
richk@6719: 	};
truelight@0: 
richk@10184: 	uint16 m;
richk@10184: 
truelight@0: 	if (t->fund_buildings_months != 0) {
richk@6719: 		m = _grow_count_values[0][min(n, 5)];
truelight@0: 		t->fund_buildings_months--;
truelight@0: 	} else {
richk@6719: 		m = _grow_count_values[1][min(n, 5)];
rubidium@6871: 		if (n == 0 && !Chance16(1, 12)) return;
truelight@0: 	}
truelight@0: 
belugas@6683: 	if (_opt.landscape == LT_ARCTIC) {
maedhros@6669: 		if (TilePixelHeight(t->xy) >= GetSnowLine() && t->act_food == 0 && t->population > 90)
truelight@0: 			return;
belugas@6683: 	} else if (_opt.landscape == LT_TROPIC) {
rubidium@4434: 		if (GetTropicZone(t->xy) == TROPICZONE_DESERT && (t->act_food==0 || t->act_water==0) && t->population > 60)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
richk@6719: 	/* Use the normal growth rate values if new buildings have been funded in
richk@6719: 	 * this town and the growth rate is set to none. */
richk@6719: 	uint growth_multiplier = _patches.town_growth_rate != 0 ? _patches.town_growth_rate - 1 : 1;
richk@6719: 
richk@6719: 	m >>= growth_multiplier;
richk@6719: 	if (t->larger_town) m /= 2;
richk@6719: 
rubidium@4434: 	t->growth_rate = m / (t->num_houses / 50 + 1);
truelight@0: 	if (m <= t->grow_counter)
truelight@0: 		t->grow_counter = m;
truelight@0: 
rubidium@6871: 	SetBit(t->flags12, TOWN_IS_FUNDED);
truelight@0: }
truelight@0: 
truelight@0: static void UpdateTownAmounts(Town *t)
truelight@0: {
richk@6719: 	/* Using +1 here to prevent overflow and division by zero */
truelight@0: 	t->pct_pass_transported = t->new_act_pass * 256 / (t->new_max_pass + 1);
truelight@0: 
truelight@0: 	t->max_pass = t->new_max_pass; t->new_max_pass = 0;
truelight@0: 	t->act_pass = t->new_act_pass; t->new_act_pass = 0;
truelight@0: 	t->act_food = t->new_act_food; t->new_act_food = 0;
darkvater@4: 	t->act_water = t->new_act_water; t->new_act_water = 0;
truelight@0: 
richk@6719: 	/* Using +1 here to prevent overflow and division by zero */
truelight@0: 	t->pct_mail_transported = t->new_act_mail * 256 / (t->new_max_mail + 1);
truelight@0: 	t->max_mail = t->new_max_mail; t->new_max_mail = 0;
truelight@0: 	t->act_mail = t->new_act_mail; t->new_act_mail = 0;
truelight@0: 
truelight@0: 	InvalidateWindow(WC_TOWN_VIEW, t->index);
truelight@0: }
truelight@0: 
truelight@0: static void UpdateTownUnwanted(Town *t)
truelight@0: {
richk@10184: 	const Player *p;
truelight@0: 
truelight@0: 	FOR_ALL_PLAYERS(p) {
tron@4000: 		if (t->unwanted[p->index] > 0) t->unwanted[p->index]--;
truelight@0: 	}
truelight@0: }
truelight@0: 
tron@1977: bool CheckIfAuthorityAllows(TileIndex tile)
truelight@0: {
Darkvater@4850: 	if (!IsValidPlayer(_current_player)) return true;
truelight@0: 
richk@10184: 	Town *t = ClosestTownFromTile(tile, _patches.dist_local_authority);
tron@4000: 	if (t == NULL) return true;
truelight@0: 
richk@10184: 	if (t->ratings[_current_player] > RATING_VERYPOOR) return true;
truelight@0: 
truelight@0: 	_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;
tron@534: 	SetDParam(0, t->index);
truelight@0: 
truelight@0: 	return false;
truelight@0: }
truelight@0: 
truelight@0: 
richk@10184: Town *CalcClosestTownFromTile(TileIndex tile, uint threshold)
truelight@0: {
truelight@0: 	Town *t;
richk@10184: 	uint best = threshold;
truelight@0: 	Town *best_town = NULL;
truelight@193: 
truelight@0: 	FOR_ALL_TOWNS(t) {
richk@10184: 		uint dist = DistanceManhattan(tile, t->xy);
truelight@4346: 		if (dist < best) {
truelight@4346: 			best = dist;
truelight@4346: 			best_town = t;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return best_town;
truelight@0: }
truelight@0: 
tron@3983: 
tron@3983: Town *ClosestTownFromTile(TileIndex tile, uint threshold)
tron@3983: {
tron@3983: 	if (IsTileType(tile, MP_HOUSE) || (
richk@6743: 				IsTileType(tile, MP_ROAD) &&
richk@6719: 				GetRoadOwner(tile, ROADTYPE_ROAD) == OWNER_TOWN
tron@3983: 			)) {
tron@3983: 		return GetTownByTile(tile);
tron@3983: 	} else {
tron@3983: 		return CalcClosestTownFromTile(tile, threshold);
tron@3983: 	}
tron@3983: }
tron@3983: 
rubidium@6872: static bool _town_rating_test = false;
rubidium@6872: 
rubidium@6872: void SetTownRatingTestMode(bool mode)
rubidium@6872: {
rubidium@6872: 	static int ref_count = 0;
rubidium@6872: 	if (mode) {
rubidium@6872: 		if (ref_count == 0) {
rubidium@6872: 			Town *t;
rubidium@6872: 			FOR_ALL_TOWNS(t) t->test_rating = t->ratings[_current_player];
rubidium@6872: 		}
rubidium@6872: 		ref_count++;
rubidium@6872: 	} else {
rubidium@6872: 		assert(ref_count > 0);
rubidium@6872: 		ref_count--;
rubidium@6872: 	}
rubidium@6872: 	_town_rating_test = !(ref_count == 0);
rubidium@6872: }
tron@3983: 
truelight@0: void ChangeTownRating(Town *t, int add, int max)
truelight@0: {
richk@6719: 	/* if magic_bulldozer cheat is active, town doesn't penaltize for removing stuff */
tron@2639: 	if (t == NULL ||
Darkvater@4850: 			!IsValidPlayer(_current_player) ||
tron@2639: 			(_cheats.magic_bulldozer.value && add < 0)) {
truelight@0: 		return;
tron@2639: 	}
truelight@0: 
rubidium@6871: 	SetBit(t->have_ratings, _current_player);
truelight@193: 
richk@10184: 	int rating = _town_rating_test ? t->test_rating : t->ratings[_current_player];
truelight@193: 
truelight@0: 	if (add < 0) {
truelight@0: 		if (rating > max) {
truelight@0: 			rating += add;
truelight@0: 			if (rating < max) rating = max;
truelight@0: 		}
truelight@0: 	} else {
truelight@0: 		if (rating < max) {
truelight@0: 			rating += add;
truelight@0: 			if (rating > max) rating = max;
truelight@0: 		}
truelight@0: 	}
rubidium@6872: 	if (_town_rating_test) {
rubidium@6872: 		t->test_rating = rating;
rubidium@6872: 	} else {
rubidium@6872: 		t->ratings[_current_player] = rating;
rubidium@6872: 	}
truelight@0: }
truelight@0: 
rubidium@4434: /* penalty for removing town-owned stuff */
truelight@0: static const int _default_rating_settings [3][3] = {
richk@6719: 	/* ROAD_REMOVE, TUNNELBRIDGE_REMOVE, INDUSTRY_REMOVE */
rubidium@6870: 	{  0, 128, 384}, // Permissive
rubidium@6870: 	{ 48, 192, 480}, // Neutral
rubidium@6870: 	{ 96, 384, 768}, // Hostile
truelight@0: };
truelight@0: 
tron@2958: bool CheckforTownRating(uint32 flags, Town *t, byte type)
truelight@0: {
richk@6719: 	/* if magic_bulldozer cheat is active, town doesn't restrict your destructive actions */
Darkvater@4850: 	if (t == NULL || !IsValidPlayer(_current_player) || _cheats.magic_bulldozer.value)
truelight@0: 		return true;
truelight@0: 
rubidium@4434: 	/* check if you're allowed to remove the street/bridge/tunnel/industry
rubidium@4434: 	 * owned by a town no removal if rating is lower than ... depends now on
rubidium@4434: 	 * difficulty setting. Minimum town rating selected by difficulty level
truelight@0: 	 */
richk@10184: 	int modemod = _default_rating_settings[_opt.diff.town_council_tolerance][type];
truelight@0: 
rubidium@6872: 	if ((_town_rating_test ? t->test_rating : t->ratings[_current_player]) < 16 + modemod && !(flags & DC_NO_TOWN_RATING)) {
tron@534: 		SetDParam(0, t->index);
truelight@0: 		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;
truelight@0: 		return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
rubidium@6573: void TownsMonthlyLoop()
truelight@0: {
truelight@0: 	Town *t;
truelight@0: 
truelight@4346: 	FOR_ALL_TOWNS(t) {
tron@4000: 		if (t->road_build_months != 0) t->road_build_months--;
truelight@0: 
dominik@121: 		if (t->exclusive_counter != 0)
rubidium@5838: 			if (--t->exclusive_counter == 0) t->exclusivity = INVALID_PLAYER;
dominik@121: 
truelight@0: 		UpdateTownGrowRate(t);
truelight@0: 		UpdateTownAmounts(t);
truelight@0: 		UpdateTownUnwanted(t);
truelight@0: 	}
truelight@0: }
truelight@0: 
rubidium@6573: void InitializeTowns()
truelight@0: {
truelight@1260: 	/* Clean the town pool and create 1 block in it */
rubidium@6800: 	_Town_pool.CleanPool();
rubidium@6800: 	_Town_pool.AddBlockToPool();
truelight@0: 
truelight@0: 	memset(_subsidies, 0, sizeof(_subsidies));
richk@10184: 	for (Subsidy *s = _subsidies; s != endof(_subsidies); s++) {
tron@2469: 		s->cargo_type = CT_INVALID;
richk@10184: 	}
truelight@0: 
truelight@0: 	_cur_town_ctr = 0;
pasky@1529: 	_cur_town_iter = 0;
truelight@1260: 	_total_towns = 0;
truelight@0: 	_town_sort_dirty = true;
truelight@0: }
truelight@0: 
rubidium@6868: static CommandCost TerraformTile_Town(TileIndex tile, uint32 flags, uint z_new, Slope tileh_new)
rubidium@6868: {
rubidium@6870: 	if (AutoslopeEnabled()) {
rubidium@6870: 		HouseID house = GetHouseType(tile);
richk@10184: 		const HouseSpec *hs = GetHouseSpecs(house);
rubidium@6870: 
rubidium@6870: 		/* Here we differ from TTDP by checking TILE_NOT_SLOPED */
rubidium@6870: 		if (((hs->building_flags & TILE_NOT_SLOPED) == 0) && !IsSteepSlope(tileh_new) &&
rubidium@6872: 			(GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
rubidium@6870: 	}
rubidium@6870: 
rubidium@6868: 	return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
rubidium@6868: }
rubidium@6868: 
rubidium@5838: extern const TileTypeProcs _tile_type_town_procs = {
rubidium@4344: 	DrawTile_Town,           /* draw_tile_proc */
rubidium@4344: 	GetSlopeZ_Town,          /* get_slope_z_proc */
rubidium@4344: 	ClearTile_Town,          /* clear_tile_proc */
rubidium@4344: 	GetAcceptedCargo_Town,   /* get_accepted_cargo_proc */
rubidium@4344: 	GetTileDesc_Town,        /* get_tile_desc_proc */
rubidium@4344: 	GetTileTrackStatus_Town, /* get_tile_track_status_proc */
rubidium@4344: 	ClickTile_Town,          /* click_tile_proc */
rubidium@4344: 	AnimateTile_Town,        /* animate_tile_proc */
rubidium@4344: 	TileLoop_Town,           /* tile_loop_clear */
rubidium@4344: 	ChangeTileOwner_Town,    /* change_tile_owner_clear */
richk@10184: 	GetProducedCargo_Town,   /* get_produced_cargo_proc */
rubidium@4344: 	NULL,                    /* vehicle_enter_tile_proc */
richk@6743: 	GetFoundation_Town,      /* get_foundation_proc */
rubidium@6868: 	TerraformTile_Town,      /* terraform_tile_proc */
truelight@0: };
truelight@0: 
truelight@0: 
richk@6719: /** Save and load of towns. */
Darkvater@1881: static const SaveLoad _town_desc[] = {
rubidium@4344: 	SLE_CONDVAR(Town, xy,                    SLE_FILE_U16 | SLE_VAR_U32, 0, 5),
rubidium@4344: 	SLE_CONDVAR(Town, xy,                    SLE_UINT32,                 6, SL_MAX_VERSION),
truelight@193: 
richk@10184: 	SLE_CONDNULL(2, 0, 2),                   ///< population, no longer in use
richk@10184: 	SLE_CONDNULL(4, 3, 84),                  ///< population, no longer in use
richk@10184: 	SLE_CONDNULL(2, 0, 91),                  ///< num_houses, no longer in use
richk@10184: 
richk@6720: 	SLE_CONDVAR(Town, townnamegrfid,         SLE_UINT32, 66, SL_MAX_VERSION),
rubidium@4344: 	    SLE_VAR(Town, townnametype,          SLE_UINT16),
rubidium@4344: 	    SLE_VAR(Town, townnameparts,         SLE_UINT32),
rubidium@6872: 	SLE_CONDSTR(Town, name,                  SLE_STR, 0, 84, SL_MAX_VERSION),
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, flags12,               SLE_UINT8),
rubidium@4344: 	    SLE_VAR(Town, statues,               SLE_UINT8),
truelight@0: 
richk@10184: 	SLE_CONDNULL(1, 0, 1),                   ///< sort_index, no longer in use
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, have_ratings,          SLE_UINT8),
rubidium@4344: 	    SLE_ARR(Town, ratings,               SLE_INT16, 8),
richk@6719: 	/* failed bribe attempts are stored since savegame format 4 */
richk@10184: 	SLE_CONDARR(Town, unwanted,              SLE_INT8, 8, 4, SL_MAX_VERSION),
celestar@1377: 
rubidium@4344: 	SLE_CONDVAR(Town, max_pass,              SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, max_mail,              SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, new_max_pass,          SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, new_max_mail,          SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, act_pass,              SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, act_mail,              SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, new_act_pass,          SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
rubidium@4344: 	SLE_CONDVAR(Town, new_act_mail,          SLE_FILE_U16 | SLE_VAR_U32, 0, 8),
truelight@0: 
rubidium@4344: 	SLE_CONDVAR(Town, max_pass,              SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, max_mail,              SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, new_max_pass,          SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, new_max_mail,          SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, act_pass,              SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, act_mail,              SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, new_act_pass,          SLE_UINT32,                 9, SL_MAX_VERSION),
rubidium@4344: 	SLE_CONDVAR(Town, new_act_mail,          SLE_UINT32,                 9, SL_MAX_VERSION),
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, pct_pass_transported,  SLE_UINT8),
rubidium@4344: 	    SLE_VAR(Town, pct_mail_transported,  SLE_UINT8),
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, act_food,              SLE_UINT16),
rubidium@4344: 	    SLE_VAR(Town, act_water,             SLE_UINT16),
rubidium@4344: 	    SLE_VAR(Town, new_act_food,          SLE_UINT16),
rubidium@4344: 	    SLE_VAR(Town, new_act_water,         SLE_UINT16),
rubidium@4344: 
richk@6719: 	SLE_CONDVAR(Town, time_until_rebuild,    SLE_UINT8,                  0, 53),
richk@6719: 	SLE_CONDVAR(Town, grow_counter,          SLE_UINT8,                  0, 53),
richk@6719: 	SLE_CONDVAR(Town, growth_rate,           SLE_UINT8,                  0, 53),
richk@6719: 
rubidium@6872: 	SLE_CONDVAR(Town, time_until_rebuild,    SLE_UINT16,                54, SL_MAX_VERSION),
rubidium@6872: 	SLE_CONDVAR(Town, grow_counter,          SLE_UINT16,                54, SL_MAX_VERSION),
rubidium@6872: 	SLE_CONDVAR(Town, growth_rate,           SLE_INT16,                 54, SL_MAX_VERSION),
richk@6719: 
rubidium@4344: 	    SLE_VAR(Town, fund_buildings_months, SLE_UINT8),
rubidium@4344: 	    SLE_VAR(Town, road_build_months,     SLE_UINT8),
rubidium@4344: 
rubidium@6872: 	SLE_CONDVAR(Town, exclusivity,           SLE_UINT8,                  2, SL_MAX_VERSION),
rubidium@6872: 	SLE_CONDVAR(Town, exclusive_counter,     SLE_UINT8,                  2, SL_MAX_VERSION),
richk@6719: 
richk@6719: 	SLE_CONDVAR(Town, larger_town,           SLE_BOOL,                  56, SL_MAX_VERSION),
richk@6719: 
richk@6719: 	/* reserve extra space in savegame here. (currently 30 bytes) */
Darkvater@3222: 	SLE_CONDNULL(30, 2, SL_MAX_VERSION),
truelight@0: 
truelight@0: 	SLE_END()
truelight@0: };
truelight@0: 
maedhros@6658: /* Save and load the mapping between the house id on the map, and the grf file
maedhros@6658:  * it came from. */
maedhros@6658: static const SaveLoad _house_id_mapping_desc[] = {
richk@6719: 	SLE_VAR(EntityIDMapping, grfid,         SLE_UINT32),
richk@6719: 	SLE_VAR(EntityIDMapping, entity_id,     SLE_UINT8),
richk@6719: 	SLE_VAR(EntityIDMapping, substitute_id, SLE_UINT8),
maedhros@6658: 	SLE_END()
maedhros@6658: };
maedhros@6658: 
maedhros@6658: static void Save_HOUSEIDS()
maedhros@6658: {
richk@6719: 	uint j = _house_mngr.GetMaxMapping();
richk@6719: 
richk@6719: 	for (uint i = 0; i < j; i++) {
maedhros@6658: 		SlSetArrayIndex(i);
richk@6719: 		SlObject(&_house_mngr.mapping_ID[i], _house_id_mapping_desc);
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static void Load_HOUSEIDS()
maedhros@6658: {
maedhros@6658: 	int index;
maedhros@6658: 
richk@6719: 	_house_mngr.ResetMapping();
richk@6719: 	uint max_id = _house_mngr.GetMaxMapping();
maedhros@6658: 
maedhros@6658: 	while ((index = SlIterateArray()) != -1) {
richk@6719: 		if ((uint)index >= max_id) break;
richk@6719: 		SlObject(&_house_mngr.mapping_ID[index], _house_id_mapping_desc);
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
rubidium@6573: static void Save_TOWN()
truelight@0: {
truelight@0: 	Town *t;
truelight@0: 
truelight@919: 	FOR_ALL_TOWNS(t) {
truelight@4346: 		SlSetArrayIndex(t->index);
truelight@4346: 		SlObject(t, _town_desc);
truelight@0: 	}
truelight@0: }
truelight@0: 
rubidium@6573: static void Load_TOWN()
truelight@0: {
truelight@0: 	int index;
truelight@919: 
truelight@1261: 	_total_towns = 0;
truelight@1261: 
truelight@1260: 	while ((index = SlIterateArray()) != -1) {
richk@6743: 		Town *t = new (index) Town();
truelight@0: 		SlObject(t, _town_desc);
truelight@1260: 
rubidium@5298: 		_total_towns++;
truelight@0: 	}
truelight@1260: 
truelight@1260: 	/* This is to ensure all pointers are within the limits of
truelight@1260: 	 *  the size of the TownPool */
matthijs@5247: 	if (_cur_town_ctr > GetMaxTownIndex())
truelight@1260: 		_cur_town_ctr = 0;
truelight@0: }
truelight@0: 
rubidium@6573: void AfterLoadTown()
truelight@0: {
richk@10184: 	_town_sort_dirty = true;
richk@10184: 
truelight@0: 	Town *t;
richk@10184: 	FOR_ALL_TOWNS(t) t->InitializeLayout();
truelight@0: }
truelight@0: 
rubidium@5838: extern const ChunkHandler _town_chunk_handlers[] = {
maedhros@6658: 	{ 'HIDS', Save_HOUSEIDS, Load_HOUSEIDS, CH_ARRAY },
maedhros@6658: 	{ 'CITY', Save_TOWN,     Load_TOWN,     CH_ARRAY | CH_LAST},
truelight@0: };
maedhros@6658: 
maedhros@6658: void ResetHouses()
maedhros@6658: {
maedhros@6658: 	memset(&_house_specs, 0, sizeof(_house_specs));
maedhros@6658: 	memcpy(&_house_specs, &_original_house_specs, sizeof(_original_house_specs));
rubidium@6870: 
rubidium@6870: 	/* Reset any overrides that have been set. */
rubidium@6870: 	_house_mngr.ResetOverride();
maedhros@6658: }