tron@2186: /* $Id$ */
tron@2186: 
belugas@6527: /** @file town_cmd.cpp */
belugas@6527: 
truelight@0: #include "stdafx.h"
Darkvater@1891: #include "openttd.h"
tron@2163: #include "functions.h"
maedhros@6658: #include "debug.h"
tron@1309: #include "strings.h"
tron@3144: #include "road_map.h"
tron@507: #include "table/strings.h"
celestar@2148: #include "table/sprites.h"
tron@679: #include "map.h"
maedhros@6669: #include "landscape.h"
tron@1209: #include "tile.h"
tron@3319: #include "town_map.h"
tron@3154: #include "tunnel_map.h"
truelight@0: #include "viewport.h"
truelight@0: #include "town.h"
truelight@0: #include "command.h"
truelight@0: #include "gfx.h"
truelight@0: #include "industry.h"
truelight@0: #include "station.h"
maedhros@6658: #include "vehicle.h"
truelight@0: #include "player.h"
truelight@0: #include "news.h"
truelight@0: #include "saveload.h"
truelight@0: #include "economy.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"
rubidium@4261: #include "date.h"
belugas@3654: #include "table/town_land.h"
truelight@4300: #include "genworld.h"
maedhros@6658: #include "newgrf.h"
maedhros@6658: #include "newgrf_callbacks.h"
maedhros@6658: #include "newgrf_house.h"
truelight@0: 
truelight@1260: /**
truelight@1260:  * Called if a new block is added to the town-pool
truelight@1260:  */
truelight@1260: static void TownPoolNewBlock(uint start_item)
truelight@1260: {
truelight@1260: 	Town *t;
truelight@1260: 
truelight@4346: 	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
truelight@4346: 	 * TODO - This is just a temporary stage, this will be removed. */
tron@4983: 	for (t = GetTown(start_item); t != NULL; t = (t->index + 1U < GetTownPoolSize()) ? GetTown(t->index + 1U) : NULL) t->index = start_item++;
truelight@1260: }
truelight@1260: 
truelight@1260: /* Initialize the town-pool */
matthijs@5216: DEFINE_OLD_POOL(Town, Town, TownPoolNewBlock, NULL)
truelight@1260: 
belugas@7030: /**
belugas@7030:  * Removes a specific town as well as all industries
belugas@7030:  * under its "juridiction"
belugas@7030:  * @param t Town to remove
belugas@7030:  */
truelight@4396: void DestroyTown(Town *t)
truelight@4396: {
truelight@4396: 	Industry *i;
truelight@4396: 	TileIndex tile;
truelight@4396: 
truelight@4396: 	/* Delete town authority window
truelight@4396: 	 * and remove from list of sorted towns */
truelight@4396: 	DeleteWindowById(WC_TOWN_VIEW, t->index);
truelight@4396: 	_town_sort_dirty = true;
rubidium@5298: 	_total_towns--;
truelight@4396: 
truelight@4396: 	/* Delete all industries belonging to the town */
truelight@4396: 	FOR_ALL_INDUSTRIES(i) if (i->town == t) DeleteIndustry(i);
truelight@4396: 
truelight@4396: 	/* Go through all tiles and delete those belonging to the town */
truelight@4396: 	for (tile = 0; tile < MapSize(); ++tile) {
truelight@4396: 		switch (GetTileType(tile)) {
truelight@4396: 			case MP_HOUSE:
truelight@4396: 				if (GetTownByTile(tile) == t) DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@4396: 				break;
truelight@4396: 
truelight@4396: 			case MP_STREET:
truelight@4396: 			case MP_TUNNELBRIDGE:
truelight@4396: 				if (IsTileOwner(tile, OWNER_TOWN) &&
truelight@4396: 						ClosestTownFromTile(tile, (uint)-1) == t)
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: 
truelight@4396: 	DeleteName(t->townnametype);
rubidium@5566: 	DeleteSubsidyWithTown(t->index);
truelight@4396: 
truelight@4396: 	MarkWholeScreenDirty();
truelight@4396: }
truelight@4396: 
truelight@0: // Local
truelight@0: static int _grow_town_result;
truelight@0: 
tron@1977: static bool BuildTownHouse(Town *t, TileIndex tile);
tron@1977: static void DoBuildTownHouse(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);
truelight@0: static TownDrawTileProc * const _town_draw_tile_procs[1] = {
ludde@2065: 	TownDrawHouseLift
truelight@0: };
truelight@0: 
maedhros@6658: uint OriginalTileRandomiser(uint x, uint y)
maedhros@6658: {
maedhros@6658: 	uint variant;
maedhros@6658: 	variant  = x >> 4;
maedhros@6658: 	variant ^= x >> 6;
maedhros@6658: 	variant ^= y >> 4;
maedhros@6658: 	variant -= y >> 6;
maedhros@6658: 	variant &= 3;
maedhros@6658: 	return variant;
maedhros@6658: }
truelight@0: 
belugas@7030: /**
belugas@7030:  * House Tile drawing handler.
belugas@7030:  * Part of the tile loop process
belugas@7030:  * @param ti TileInfo of the tile to draw
belugas@7030:  */
truelight@0: static void DrawTile_Town(TileInfo *ti)
truelight@0: {
belugas@3654: 	const DrawBuildingsTileStruct *dcts;
peter1138@5919: 	SpriteID image;
peter1138@5919: 	SpriteID pal;
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 */
maedhros@6658: 	dcts = &_town_draw_tile_data[house_id << 4 | OriginalTileRandomiser(ti->x, ti->y) << 2 | GetHouseBuildingStage(ti->tile)];
truelight@0: 
tron@4053: 	if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, ti->tileh);
peter1138@5919: 
peter1138@5919: 	image = dcts->ground.sprite;
peter1138@5919: 	pal   = dcts->ground.pal;
peter1138@5919: 	DrawGroundSprite(image, pal);
truelight@0: 
truelight@0: 	/* Add a house on top of the ground? */
peter1138@5919: 	image = dcts->building.sprite;
tron@2639: 	if (image != 0) {
peter1138@6923: 		if (HASBIT(_transparent_opt, TO_HOUSES)) {
peter1138@5919: 			SETBIT(image, PALETTE_MODIFIER_TRANSPARENT);
peter1138@5919: 			pal = PALETTE_TO_TRANSPARENT;
peter1138@5919: 		} else {
peter1138@5919: 			pal = dcts->building.pal;
peter1138@5919: 		}
truelight@193: 
peter1138@5919: 		AddSortableSpriteToDraw(image, pal,
tron@482: 			ti->x + dcts->subtile_x,
tron@482: 			ti->y + dcts->subtile_y,
tron@482: 			dcts->width + 1,
tron@482: 			dcts->height + 1,
truelight@0: 			dcts->dz,
tron@4053: 			ti->z
tron@4053: 		);
truelight@0: 
peter1138@6923: 		if (HASBIT(_transparent_opt, 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: 
tron@3636: static Slope GetSlopeTileh_Town(TileIndex tile, Slope tileh)
dominik@39: {
tron@3636: 	return SLOPE_FLAT;
dominik@39: }
dominik@39: 
belugas@7030: /**
belugas@7030:  * Animate a tile for a town
belugas@7030:  * Only certain houses can be animated
belugas@7030:  * The newhouses animation superseeds regular ones
belugas@7030:  * @param tile TileIndex of the house to animate
belugas@7030:  */
tron@1977: static void AnimateTile_Town(TileIndex tile)
truelight@0: {
celestar@3426: 	int pos, dest;
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: 
belugas@6918: 	/* If the house is not one with a lift anymore, then stop this animating.
belugas@6918: 	 * Not exactly sure when this happens, but probably when a house changes.
belugas@6918: 	 * Before this was just a return...so it'd leak animated tiles..
belugas@6918: 	 * 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)) {
tron@2639: 		int i;
tron@2639: 
belugas@6918: 		/*  Building has 6 floors, number 0 .. 6, where 1 is illegal.
Darkvater@2891: 		 *  This is due to the fact that the first floor is, in the graphics,
Darkvater@2891: 		 *  the height of 2 'normal' floors.
Darkvater@2891: 		 *  Furthermore, there are 6 lift positions from floor N (incl) to floor N + 1 (excl) */
truelight@0: 		do {
tron@2639: 			i = (Random() & 7) - 1;
celestar@3426: 		} while (i < 0 || i == 1 || i * 6 == GetLiftPosition(tile));
truelight@0: 
celestar@3426: 		SetLiftDestination(tile, i);
truelight@0: 	}
truelight@0: 
celestar@3426: 	pos = GetLiftPosition(tile);
celestar@3426: 	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: 
truelight@0: static void UpdateTownRadius(Town *t);
truelight@0: 
belugas@7030: /**
belugas@7030:  * Determines if a town is close to a tile
belugas@7030:  * @param tile TileIndex of the tile to query
belugas@7030:  * @param dist maximum distance to be accepted
belugas@7030:  * @returns true if the tile correspond to the distance criteria
belugas@7030:  */
tron@1977: static bool IsCloseToTown(TileIndex tile, uint dist)
truelight@0: {
tron@2630: 	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: 
belugas@7030: /**
belugas@7030:  * Marks the town sign as needing a repaint
belugas@7030:  * @param t Town requesting repaint
belugas@7030:  */
truelight@835: static void MarkTownSignDirty(Town *t)
truelight@835: {
truelight@835: 	MarkAllViewportsDirty(
rubidium@6987: 		t->sign.left - 6,
rubidium@6987: 		t->sign.top - 3,
rubidium@6987: 		t->sign.left + t->sign.width_1 * 4 + 12,
truelight@835: 		t->sign.top + 45
truelight@835: 	);
truelight@835: }
truelight@835: 
belugas@7030: /**
belugas@7030:  * Resize the sign(label) of the town after changes in
belugas@7030:  * population (creation or growth or else)
belugas@7030:  * @param t Town to update
belugas@7030:  */
truelight@835: void UpdateTownVirtCoord(Town *t)
truelight@835: {
truelight@836: 	Point pt;
truelight@836: 
truelight@835: 	MarkTownSignDirty(t);
celestar@3422: 	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: 
belugas@7030: /**
belugas@7030:  * Change the towns population
belugas@7030:  * @param t Town which polulation has changed
belugas@7030:  * @param mod polulation change (can be positive or negative)
belugas@7030:  */
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: 
belugas@7030: /**
belugas@7030:  * Determines the world population
belugas@7030:  * Basically, count population of all towns, one by one
belugas@7030:  * @return uint32 the calculated population of the world
belugas@7030:  */
rubidium@6573: uint32 GetWorldPopulation()
celestar@1080: {
celestar@1080: 	uint32 pop;
tron@2630: 	const Town* t;
tron@2630: 
celestar@1080: 	pop = 0;
tron@2639: 	FOR_ALL_TOWNS(t) pop += t->population;
celestar@1080: 	return pop;
celestar@1080: }
celestar@1080: 
belugas@7030: /**
belugas@7030:  * Helper function for house completion stages progression
belugas@7030:  * @param tile TileIndex of the house (or parts of it) to "grow"
belugas@7030:  */
tron@1977: static void MakeSingleHouseBigger(TileIndex tile)
truelight@0: {
tron@1035: 	assert(IsTileType(tile, MP_HOUSE));
truelight@193: 
belugas@7030: 	/* means it is completed, get out. */
celestar@3426: 	if (LiftHasDestination(tile)) return;
truelight@0: 
belugas@7030: 	/* progress in construction stages */
belugas@3432: 	IncHouseConstructionTick(tile);
belugas@3432: 	if (GetHouseConstructionTick(tile) != 0) return;
truelight@0: 
belugas@7030: 	/* Check and/or  */
maedhros@6658: 	if (HASBIT(GetHouseSpecs(GetHouseType(tile))->callback_mask, CBM_CONSTRUCTION_STATE_CHANGE)) {
maedhros@6658: 		uint16 callback_res = GetHouseCallback(CBID_CONSTRUCTION_STATE_CHANGE, 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: 
belugas@7030: /** Make the house advances in its construction stages until completion
belugas@7030:  * @param tile TileIndex of house
belugas@7030:  */
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: 
belugas@7030: /**
belugas@7030:  * Periodic tic handler for houses and town
belugas@7030:  * @param tile been asked to do its stuff
belugas@7030:  */
tron@1977: static void TileLoop_Town(TileIndex tile)
truelight@0: {
truelight@0: 	Town *t;
truelight@0: 	uint32 r;
maedhros@6658: 	HouseID house_id = GetHouseType(tile);
maedhros@6658: 	HouseSpec *hs = GetHouseSpecs(house_id);
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)) {
belugas@6918: 		/* Construction is not completed. See if we can go further in construction*/
truelight@0: 		MakeTownHouseBigger(tile);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
maedhros@6658: 	/* If the lift has a destination, it is already an animated tile. */
belugas@7030: 	if ((hs->building_flags & BUILDING_IS_ANIMATED) &&
belugas@7030: 			house_id < NEW_HOUSE_OFFSET &&
belugas@7030: 			!LiftHasDestination(tile) &&
belugas@7030: 			CHANCE16(1, 2))
belugas@7030: 		AddAnimatedTile(tile);
truelight@0: 
tron@3319: 	t = GetTownByTile(tile);
truelight@0: 
truelight@0: 	r = Random();
truelight@0: 
maedhros@6658: 	if (GB(r, 0, 8) < hs->population) {
tron@2150: 		uint amt = GB(r, 0, 8) / 8 + 1;
tron@2150: 		uint moved;
tron@2150: 
truelight@0: 		if (_economy.fluct <= 0) amt = (amt + 1) >> 1;
truelight@0: 		t->new_max_pass += amt;
truelight@0: 		moved = MoveGoodsToStation(tile, 1, 1, CT_PASSENGERS, amt);
truelight@0: 		t->new_act_pass += moved;
truelight@0: 	}
truelight@0: 
maedhros@6658: 	if (GB(r, 8, 8) < hs->mail_generation) {
tron@2150: 		uint amt = GB(r, 8, 8) / 8 + 1;
tron@2150: 		uint moved;
tron@2150: 
truelight@0: 		if (_economy.fluct <= 0) amt = (amt + 1) >> 1;
truelight@0: 		t->new_max_mail += amt;
truelight@0: 		moved = MoveGoodsToStation(tile, 1, 1, CT_MAIL, amt);
truelight@0: 		t->new_act_mail += moved;
truelight@0: 	}
truelight@0: 
maedhros@6658: 	_current_player = OWNER_TOWN;
maedhros@6658: 
belugas@7030: 	if (hs->building_flags & BUILDING_HAS_1_TILE &&
belugas@7030: 			HASBIT(t->flags12, TOWN_IS_FUNDED) &&
belugas@7030: 			CanDeleteHouse(tile) &&
maedhros@7101: 			max(_cur_year - GetHouseConstructionYear(tile), 0) >= hs->minimum_life &&
belugas@7030: 			--t->time_until_rebuild == 0) {
maedhros@6950: 		t->time_until_rebuild = GB(r, 16, 8) + 192;
truelight@0: 
truelight@0: 		ClearTownHouse(t, tile);
truelight@193: 
maedhros@6950: 		/* Rebuild with another house? */
tron@2150: 		if (GB(r, 24, 8) >= 12) DoBuildTownHouse(t, tile);
maedhros@6658: 	}
truelight@314: 
maedhros@6658: 	_current_player = OWNER_NONE;
truelight@0: }
truelight@0: 
belugas@7030: /**
belugas@7030:  * Unused handler
belugas@7030:  * @param tile unused
belugas@7030:  */
tron@1977: static void ClickTile_Town(TileIndex tile)
truelight@0: {
truelight@0: 	/* not used */
truelight@0: }
truelight@0: 
tron@1977: static int32 ClearTile_Town(TileIndex tile, byte flags)
truelight@0: {
maedhros@6658: 	int rating;
truelight@0: 	int32 cost;
truelight@0: 	Town *t;
maedhros@6658: 	HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
truelight@0: 
truelight@0: 	if (flags&DC_AUTO && !(flags&DC_AI_BUILDING)) return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
maedhros@6658: 	if (!CanDeleteHouse(tile)) return CMD_ERROR;
truelight@0: 
maedhros@6658: 	cost = _price.remove_house * hs->removal_cost >> 8;
truelight@0: 
maedhros@6658: 	rating = hs->remove_rating_decrease;
truelight@0: 	_cleared_town_rating += rating;
tron@3319: 	_cleared_town = t = 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: 
truelight@0: 	if (flags & DC_EXEC) {
celestar@1005: 		ChangeTownRating(t, -rating, RATING_HOUSE_MINIMUM);
truelight@0: 		ClearTownHouse(t, tile);
truelight@0: 	}
truelight@0: 
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
tron@1977: static void GetAcceptedCargo_Town(TileIndex tile, AcceptedCargo ac)
truelight@0: {
maedhros@6658: 	HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
peter1138@7021: 	CargoID accepts[3];
truelight@193: 
peter1138@7021: 	/* Set the initial accepted cargo types */
peter1138@7021: 	for (uint8 i = 0; i < lengthof(accepts); i++) {
peter1138@7021: 		accepts[i] = hs->accepts_cargo[i];
peter1138@7021: 	}
peter1138@7021: 
peter1138@7021: 	/* Check for custom accepted cargo types */
peter1138@7021: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_ACCEPT_CARGO)) {
peter1138@7021: 		uint16 callback = GetHouseCallback(CBID_HOUSE_ACCEPT_CARGO, 0, GetHouseType(tile), GetTownByTile(tile), tile);
peter1138@7021: 		if (callback != CALLBACK_FAILED) {
peter1138@7021: 			/* Replace accepted cargo types with translated values from callback */
peter1138@7021: 			accepts[0] = GetCargoTranslation(GB(callback,  0, 5), hs->grffile);
peter1138@7021: 			accepts[1] = GetCargoTranslation(GB(callback,  5, 5), hs->grffile);
peter1138@7021: 			accepts[2] = GetCargoTranslation(GB(callback, 10, 5), hs->grffile);
peter1138@7021: 		}
peter1138@7021: 	}
peter1138@7021: 
peter1138@7021: 	/* Check for custom cargo acceptance */
peter1138@7021: 	if (HASBIT(hs->callback_mask, CBM_CARGO_ACCEPTANCE)) {
peter1138@7021: 		uint16 callback = GetHouseCallback(CBID_HOUSE_CARGO_ACCEPTANCE, 0, GetHouseType(tile), GetTownByTile(tile), tile);
peter1138@7021: 		if (callback != CALLBACK_FAILED) {
peter1138@7021: 			if (accepts[0] != CT_INVALID) ac[accepts[0]] = GB(callback, 0, 4);
peter1138@7021: 			if (accepts[1] != CT_INVALID) ac[accepts[1]] = GB(callback, 4, 4);
peter1138@7021: 			if (_opt.landscape != LT_TEMPERATE && HASBIT(callback, 12)) {
peter1138@7021: 				/* The 'S' bit indicates food instead of goods */
peter1138@7021: 				ac[CT_FOOD] = GB(callback, 8, 4);
peter1138@7021: 			} else {
peter1138@7021: 				if (accepts[2] != CT_INVALID) ac[accepts[2]] = GB(callback, 8, 4);
peter1138@7021: 			}
peter1138@7021: 			return;
peter1138@7021: 		}
peter1138@7021: 	}
peter1138@7021: 
peter1138@7021: 	/* No custom acceptance, so fill in with the default values */
peter1138@7021: 	for (uint8 i = 0; i < lengthof(accepts); i++) {
peter1138@7021: 		if (accepts[i] != CT_INVALID) ac[accepts[i]] = hs->cargo_acceptance[i];
peter1138@7021: 	}
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: 
tron@1977: static uint32 GetTileTrackStatus_Town(TileIndex tile, TransportType mode)
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: 
truelight@0: 
tron@909: static const TileIndexDiffC _roadblock_tileadd[] = {
tron@909: 	{ 0, -1},
tron@909: 	{ 1,  0},
tron@909: 	{ 0,  1},
tron@909: 	{-1,  0},
truelight@193: 
belugas@6918: 	/* Store the first 3 elements again.
belugas@6918: 	 * Lets us rotate without using &3. */
tron@909: 	{ 0, -1},
tron@909: 	{ 1,  0},
tron@909: 	{ 0,  1}
truelight@0: };
truelight@0: 
belugas@7067: /**
belugas@7067:  * Distance multiplyer
belugas@7067:  * Defines the possible distances between 2 road tiles
belugas@7067:  */
belugas@7067: enum RoadBlockTitleDistance {
belugas@7067: 	RB_TILE_DIST1 = 1, ///< 1 tile between
belugas@7067: 	RB_TILE_DIST2,     ///< 2 tiles between
belugas@7067: };
tron@2817: 
tron@2817: static bool GrowTown(Town *t);
tron@2817: 
truelight@0: static void TownTickHandler(Town *t)
truelight@0: {
belugas@3432: 	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: 
tron@3150: static RoadBits GetTownRoadMask(TileIndex tile)
truelight@0: {
tron@3150: 	TrackBits b = GetAnyRoadTrackBits(tile);
rubidium@5838: 	RoadBits r = ROAD_NONE;
tron@2639: 
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: 
belugas@7067: /**
belugas@7067:  * Check if a neighboring tile has a road
belugas@7067:  *
belugas@7067:  * @param tile curent tile
belugas@7067:  * @param dir target direction
belugas@7067:  * @param dist_multi distance multiplyer
belugas@7067:  * @return true if one of the neighboring tiles at the
belugas@7067:  *  given distance is a road tile else
belugas@7067:  */
belugas@7067: static bool NeighborIsRoadTile(TileIndex tile, int dir, RoadBlockTitleDistance dist_multi)
belugas@7067: {
belugas@7067: 	return (HASBIT(GetTownRoadMask(TILE_ADD(tile, dist_multi * ToTileIndexDiff(_roadblock_tileadd[dir + 1]))), dir ^ 2) ||
belugas@7067: 			HASBIT(GetTownRoadMask(TILE_ADD(tile, dist_multi * ToTileIndexDiff(_roadblock_tileadd[dir + 3]))), dir ^ 2) ||
belugas@7067: 			HASBIT(GetTownRoadMask(TILE_ADD(tile, dist_multi * (ToTileIndexDiff(_roadblock_tileadd[dir + 1]) + ToTileIndexDiff(_roadblock_tileadd[dir + 2])))), dir) ||
belugas@7067: 			HASBIT(GetTownRoadMask(TILE_ADD(tile, dist_multi * (ToTileIndexDiff(_roadblock_tileadd[dir + 3]) + ToTileIndexDiff(_roadblock_tileadd[dir + 2])))), dir));
belugas@7067: }
belugas@7067: 
tron@1977: static bool IsRoadAllowedHere(TileIndex tile, int dir)
truelight@0: {
tron@3636: 	Slope k;
tron@3636: 	Slope slope;
truelight@0: 
belugas@6918: 	/* If this assertion fails, it might be because the world contains
belugas@6918: 	 *  land at the edges. This is not ok. */
truelight@0: 	TILE_ASSERT(tile);
truelight@193: 
tron@2639: 	for (;;) {
belugas@6918: 		/* Check if there already is a road at this point? */
tron@3150: 		if (GetAnyRoadTrackBits(tile) == 0) {
belugas@6918: 			/* No, try to build one in the direction.
belugas@6918: 			 * if that fails clear the land, and if that fails exit.
belugas@6918: 			 * This is to make sure that we can build a road here later. */
tron@3491: 			if (CmdFailed(DoCommand(tile, (dir & 1 ? 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: 
truelight@0: 		slope = GetTileSlope(tile, NULL);
tron@3636: 		if (slope == SLOPE_FLAT) {
pasky@465: no_slope:
belugas@7067: 			/* Tile has no slope */
belugas@7067: 			switch (_patches.town_layout) {
belugas@7067: 				default: NOT_REACHED();
belugas@7067: 
belugas@7067: 				case TL_ORIGINAL: /* Disallow the road if any neighboring tile has a road (distance: 1) */
belugas@7067: 					return !NeighborIsRoadTile(tile, dir, RB_TILE_DIST1);
belugas@7067: 
belugas@7067: 				case TL_BETTER_ROADS: /* Disallow the road if any neighboring tile has a road (distance: 1 and 2). */
belugas@7067: 					return !(NeighborIsRoadTile(tile, dir, RB_TILE_DIST1) ||
belugas@7067: 							NeighborIsRoadTile(tile, dir, RB_TILE_DIST2));
belugas@7067: 			}
truelight@0: 		}
truelight@193: 
belugas@6918: 		/* If the tile is not a slope in the right direction, then
belugas@6918: 		 * maybe terraform some. */
tron@3636: 		k = (dir & 1) ? SLOPE_NE : SLOPE_NW;
tron@3636: 		if (k != slope && ComplementSlope(k) != slope) {
truelight@0: 			uint32 r = Random();
truelight@0: 
tron@2639: 			if (CHANCE16I(1, 8, r) && !_generating_world) {
pasky@465: 				int32 res;
pasky@465: 
tron@2639: 				if (CHANCE16I(1, 16, r)) {
tron@3491: 					res = DoCommand(tile, slope, 0, DC_EXEC | DC_AUTO | DC_NO_WATER,
pasky@465: 					                      CMD_TERRAFORM_LAND);
tron@2639: 				} else {
tron@3639: 					res = DoCommand(tile, slope ^ 0xF, 1, DC_EXEC | DC_AUTO | DC_NO_WATER,
pasky@465: 					                      CMD_TERRAFORM_LAND);
tron@2639: 				}
tron@2646: 				if (CmdFailed(res) && CHANCE16I(1, 3, r)) {
belugas@6918: 					/* 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: 	int32 r;
truelight@193: 
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
tron@3491: 	r = DoCommand(tile, edges, dir, DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
tron@2646: 	if (CmdFailed(r) || r >= 126 * 16) 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: {
tron@3636: 	Slope tileh;
truelight@0: 
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
belugas@6918: 	/* Don't terraform if land is plain or if there's a house there. */
tron@3055: 	if (IsTileType(tile, MP_HOUSE)) return;
tron@3055: 	tileh = GetTileSlope(tile, NULL);
tron@3636: 	if (tileh == SLOPE_FLAT) return;
truelight@0: 
belugas@6918: 	/* First try up, then down */
tron@3055: 	if (!TerraformTownTile(tile, ~tileh & 0xF, 1)) {
tron@3055: 		TerraformTownTile(tile, tileh & 0xF, 0);
truelight@0: 	}
truelight@0: }
truelight@0: 
belugas@7067: /**
belugas@7067:  * Generate the RoadBits of a grid tile
belugas@7067:  *
belugas@7067:  * @param t current town
belugas@7067:  * @param tile tile in reference to the town
belugas@7067:  * @return the RoadBit of the current tile regarding
belugas@7067:  *  the selected town layout
belugas@7067:  */
belugas@7067: static RoadBits GetTownRoadGridElement(Town* t, TileIndex tile)
belugas@7067: {
belugas@7067: 	/* align the grid to the downtown */
belugas@7067: 	TileIndexDiffC grid_pos = TileIndexToTileIndexDiffC(t->xy, tile); ///< Vector from downtown to the tile
belugas@7067: 
belugas@7067: 	/* lx, ly description:
belugas@7067: 	 * @li lx and ly are true  if the tile is a crossing tile.
belugas@7067: 	 * @li lx xor ly are true  if the tile is a straight road tile.
belugas@7067: 	 * @li lx and ly are false if the tile is a house tile.
belugas@7067: 	 */
belugas@7067: 	bool lx, ly;
belugas@7067: 
belugas@7067: 	switch (_patches.town_layout) {
belugas@7067: 		default: NOT_REACHED();
belugas@7067: 
belugas@7067: 		case TL_2X2_GRID:
belugas@7067: 			lx = ((grid_pos.x % 3) == 0);
belugas@7067: 			ly = ((grid_pos.y % 3) == 0);
belugas@7067: 			break;
belugas@7067: 
belugas@7067: 		case TL_3X3_GRID:
belugas@7067: 			lx = ((grid_pos.x % 4) == 0);
belugas@7067: 			ly = ((grid_pos.y % 4) == 0);
belugas@7067: 			break;
belugas@7067: 	}
belugas@7067: 
belugas@7067: 	/* generate the basic grid structure */
belugas@7067: 	if (!lx && !ly) {         ///< It is a house tile
belugas@7067: 		return ROAD_NONE;
belugas@7067: 	} else if (lx && !ly) {   ///< It is a Y-dir road tile
belugas@7067: 		return ROAD_Y;
belugas@7067: 	} else if (!lx && ly) {   ///< It is a X-dir road tile
belugas@7067: 		return ROAD_X;
belugas@7067: 	} else {                  ///< It is a crossing tile
belugas@7067: 		/* Presets for junctions on slopes
belugas@7067: 		 * not nice :( */
belugas@7067: 		switch (GetTileSlope(tile, NULL)) {
belugas@7067: 			case SLOPE_W:
belugas@7067: 				return ROAD_NW | ROAD_SW;
belugas@7067: 			case SLOPE_S:
belugas@7067: 				return ROAD_SE | ROAD_SW;
belugas@7067: 			case SLOPE_SW:
belugas@7067: 				return ROAD_Y | ROAD_SW;
belugas@7067: 			case SLOPE_E:
belugas@7067: 				return ROAD_NE | ROAD_SE;
belugas@7067: 			case SLOPE_SE:
belugas@7067: 				return ROAD_X | ROAD_SE;
belugas@7067: 			case SLOPE_N:
belugas@7067: 				return ROAD_NW | ROAD_NE;
belugas@7067: 			case SLOPE_NW:
belugas@7067: 				return ROAD_X | ROAD_NW;
belugas@7067: 			case SLOPE_NE:
belugas@7067: 				return ROAD_Y | ROAD_NE;
belugas@7067: 			case SLOPE_STEEP_W:
belugas@7067: 			case SLOPE_STEEP_N:
belugas@7067: 				return ROAD_X;
belugas@7067: 			case SLOPE_STEEP_S:
belugas@7067: 			case SLOPE_STEEP_E:
belugas@7067: 				return ROAD_Y;
belugas@7067: 			default:
belugas@7067: 				return ROAD_ALL;
belugas@7067: 		}
belugas@7067: 	}
belugas@7067: }
belugas@7067: 
belugas@7067: /**
belugas@7067:  * Check there are enougth neighbor house tiles next to the current tile
belugas@7067:  *
belugas@7067:  * @param tile current tile
belugas@7067:  * @return true if there are more than 2 house tiles next
belugas@7067:  *  to the current one
belugas@7067:  */
belugas@7067: static bool NeighborsAreHouseTiles(TileIndex tile)
belugas@7067: {
belugas@7067: 	uint counter = 0; ///< counts the house neighbor tiles
belugas@7067: 
belugas@7067: 	/* We can't look further than that. */
belugas@7067: 	if (TileX(tile) < 1 || TileY(tile) < 1) {
belugas@7067: 		return false;
belugas@7067: 	}
belugas@7067: 
belugas@7067: 	/* Check the tiles E,N,W and S of the current tile. */
belugas@7067: 	for (uint i = 0; i < 4; i++) {
belugas@7067: 		if (IsTileType(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[i])), MP_HOUSE)) {
belugas@7067: 			counter++;
belugas@7067: 		}
belugas@7067: 
belugas@7067: 		/* If there are enougth neighbor's stop it here */
belugas@7067: 		if (counter >= 3) {
belugas@7067: 			return true;
belugas@7067: 		}
belugas@7067: 	}
belugas@7067: 	return false;
belugas@7067: }
belugas@7067: 
belugas@7067: /**
belugas@7067:  * Grows the given town.
belugas@7067:  * There are at the moment 3 possible way's for
belugas@7067:  * the town expansion:
belugas@7067:  * @li Generate a random tile and check if there is a road allowed
belugas@7067:  * 	@li TL_ORIGINAL
belugas@7067:  * 	@li TL_BETTER_ROADS
belugas@7067:  * @li Check if the town geometry allows a road and which one
belugas@7067:  * 	@li TL_2X2_GRID
belugas@7067:  * 	@li TL_3X3_GRID
belugas@7067:  * @li Forbid roads, only build houses
belugas@7067:  * 	@li TL_NO_ROADS
belugas@7067:  *
belugas@7067:  * @param tile_ptr current tile
belugas@7067:  * @param mask current tiles RoadBits
belugas@7067:  * @param block road block
belugas@7067:  * @param t1 current town
belugas@7067:  */
tron@3150: static void GrowTownInTile(TileIndex* tile_ptr, RoadBits mask, int block, Town* t1)
truelight@0: {
tron@3150: 	RoadBits rcmd;
tron@1977: 	TileIndex tmptile;
tron@3150: 	DiagDirection i;
truelight@0: 	int j;
tron@1977: 	TileIndex tile = *tile_ptr;
truelight@0: 
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
truelight@0: 	if (mask == 0) {
tron@3150: 		int a;
tron@3150: 		int b;
tron@3150: 
belugas@6918: 		/* Tile has no road. First reset the status counter
belugas@6918: 		 * to say that this is the last iteration. */
truelight@0: 		_grow_town_result = 0;
truelight@0: 
belugas@6918: 		/* Remove hills etc */
truelight@0: 		LevelTownLand(tile);
truelight@0: 
belugas@6918: 		/* Is a road allowed here? */
belugas@7067: 		switch (_patches.town_layout) {
belugas@7067: 			default: NOT_REACHED();
belugas@7067: 
belugas@7067: 			case TL_NO_ROADS: /* Disallow Roads */
belugas@7067: 				return;
belugas@7067: 
belugas@7067: 			case TL_3X3_GRID:
belugas@7067: 			case TL_2X2_GRID:
belugas@7067: 				rcmd = GetTownRoadGridElement(t1, tile);
belugas@7067: 				if (rcmd == ROAD_NONE) {
belugas@7067: 					return;
belugas@7067: 				}
belugas@7067: 				break;
belugas@7067: 
belugas@7067: 			case TL_BETTER_ROADS:
belugas@7067: 			case TL_ORIGINAL:
belugas@7067: 				if (!IsRoadAllowedHere(tile, block)) {
belugas@7067: 					return;
belugas@7067: 				}
belugas@7067: 
belugas@7067: 				/* Randomize new road block numbers */
belugas@7067: 				a = block;
belugas@7067: 				b = block ^ 2;
belugas@7067: 				if (CHANCE16(1, 4)) {
belugas@7067: 					do {
belugas@7067: 						a = GB(Random(), 0, 2);
belugas@7067: 					} while (a == b);
belugas@7067: 				}
belugas@7067: 
belugas@7067: 				if (!IsRoadAllowedHere(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[a])), a)) {
belugas@7067: 					/* A road is not allowed to continue the randomized road,
belugas@7067: 					 *   return if the road we're trying to build is curved. */
belugas@7067: 					if (a != (b ^ 2)) {
belugas@7067: 						return;
belugas@7067: 					}
belugas@7067: 
belugas@7067: 					/* Return if neither side of the new road is a house */
belugas@7067: 					if (!IsTileType(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[a + 1])), MP_HOUSE) &&
belugas@7067: 							!IsTileType(TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[a + 3])), MP_HOUSE)) {
belugas@7067: 						return;
belugas@7067: 					}
belugas@7067: 
belugas@7067: 					/* That means that the road is only allowed if there is a house
belugas@7067: 					 *  at any side of the new road. */
belugas@7067: 				}
belugas@7067: 
belugas@7067: 				rcmd = (RoadBits)((1 << a) + (1 << b));
belugas@7067: 				break;
tron@2637: 		}
truelight@0: 
rubidium@6987: 	} else if (block < 5 && !HASBIT(mask, block ^ 2)) {
belugas@6918: 		/* Continue building on a partial road.
belugas@6918: 		 * Always OK. */
truelight@0: 		_grow_town_result = 0;
belugas@7067: 
belugas@7067: 		switch (_patches.town_layout) {
belugas@7067: 			default: NOT_REACHED();
belugas@7067: 
belugas@7067: 			case TL_NO_ROADS: /* Disallow Roads */
belugas@7067: 				return;
belugas@7067: 
belugas@7067: 			case TL_3X3_GRID:
belugas@7067: 			case TL_2X2_GRID:
belugas@7067: 			 	rcmd = GetTownRoadGridElement(t1, tile);
belugas@7067: 				break;
belugas@7067: 
belugas@7067: 			case TL_BETTER_ROADS:
belugas@7067: 			case TL_ORIGINAL:
belugas@7067: 				rcmd = (RoadBits)(1 << (block ^ 2));
belugas@7067: 				break;
belugas@7067: 		}
truelight@0: 	} else {
tron@3150: 		int i;
belugas@7067: 		bool allow_house = false;
belugas@7067: 		TileIndex tmptile2;
truelight@0: 
belugas@6918: 		/* Reached a tunnel/bridge? Then continue at the other side of it. */
rubidium@5696: 		if (IsTileType(tile, MP_TUNNELBRIDGE)) {
rubidium@5696: 			if (IsTunnel(tile) && GetTunnelTransportType(tile) == TRANSPORT_ROAD) {
rubidium@5696: 				*tile_ptr = GetOtherTunnelEnd(tile);
rubidium@5696: 			} else if (IsBridge(tile) && GetBridgeTransportType(tile) == TRANSPORT_ROAD) {
rubidium@5696: 				*tile_ptr = GetOtherBridgeEnd(tile);
rubidium@5696: 			}
truelight@0: 			return;
truelight@0: 		}
truelight@193: 
belugas@6918: 		/* Possibly extend the road in a direction.
belugas@6918: 		 * Randomize a direction and if it has a road, bail out. */
tron@2635: 		i = GB(Random(), 0, 2);
tron@2639: 		if (HASBIT(mask, i)) return;
truelight@0: 
belugas@6918: 		/* This is the tile we will reach if we extend to this direction. */
tron@909: 		tmptile = TILE_ADD(tile, ToTileIndexDiff(_roadblock_tileadd[i]));
truelight@193: 
belugas@6918: 		/* Don't do it if it reaches to water. */
celestar@3433: 		if (IsClearWaterTile(tmptile)) return;
truelight@0: 
belugas@7067: 		switch (_patches.town_layout) {
belugas@7067: 			default: NOT_REACHED();
belugas@7067: 
belugas@7067: 			case TL_NO_ROADS:
belugas@7067: 				allow_house = true;
belugas@7067: 				break;
belugas@7067: 
belugas@7067: 			case TL_3X3_GRID: /* Use 2x2 grid afterwards! */
belugas@7067: 				/* Fill gap if house has enougth neighbors */
belugas@7067: 				tmptile2 = TILE_ADD(tmptile, ToTileIndexDiff(_roadblock_tileadd[i]));
belugas@7067: 				if (NeighborsAreHouseTiles(tmptile2) && BuildTownHouse(t1, tmptile2)) {
belugas@7067: 					_grow_town_result = -1;
belugas@7067: 				}
belugas@7067: 
belugas@7067: 			case TL_2X2_GRID:
belugas@7067: 				rcmd = GetTownRoadGridElement(t1, tmptile);
belugas@7067: 				allow_house = (rcmd == ROAD_NONE);
belugas@7067: 				break;
belugas@7067: 
belugas@7067: 			case TL_BETTER_ROADS: /* Use original afterwards! */
belugas@7067: 				/* Fill gap if house has enougth neighbors */
belugas@7067: 				tmptile2 = TILE_ADD(tmptile, ToTileIndexDiff(_roadblock_tileadd[i]));
belugas@7067: 				if (NeighborsAreHouseTiles(tmptile2) && BuildTownHouse(t1, tmptile2)) {
belugas@7067: 					_grow_town_result = -1;
belugas@7067: 				}
belugas@7067: 
belugas@7067: 			case TL_ORIGINAL:
belugas@7067: 				 /* Allow a house at the edge. 60% chance or
belugas@7067: 				  * always ok if no road allowed. */
belugas@7067: 				allow_house = (!IsRoadAllowedHere(tmptile, i) || CHANCE16(6, 10));
belugas@7067: 				break;
belugas@7067: 		}
belugas@7067: 
belugas@7067: 
belugas@7067: 		if (allow_house) {
belugas@7067: 			/* Build a house, but not if there already is a house there. */
tron@1035: 			if (!IsTileType(tmptile, MP_HOUSE)) {
belugas@6918: 				/* Level the land if possible */
truelight@0: 				LevelTownLand(tmptile);
truelight@0: 
belugas@6918: 				/* And build a house.
belugas@6918: 				 * Set result to -1 if we managed to build it. */
belugas@7067: 				if (BuildTownHouse(t1, tmptile)) {
belugas@7067: 					_grow_town_result = -1;
belugas@7067: 				}
truelight@0: 			}
truelight@0: 			return;
truelight@0: 		}
truelight@0: 
truelight@0: 		_grow_town_result = 0;
rubidium@5838: 		rcmd = (RoadBits)(1 << i);
truelight@0: 	}
truelight@0: 
belugas@6918: 	/* Return if a water tile */
celestar@3433: 	if (IsClearWaterTile(tile)) return;
truelight@0: 
belugas@6918: 	/* Determine direction of slope,
belugas@6918: 	 *  and build a road if not a special slope. */
tron@3055: 	switch (GetTileSlope(tile, NULL)) {
tron@3636: 		case SLOPE_SW: i = DIAGDIR_NE; break;
tron@3636: 		case SLOPE_SE: i = DIAGDIR_NW; break;
tron@3636: 		case SLOPE_NW: i = DIAGDIR_SE; break;
tron@3636: 		case SLOPE_NE: i = DIAGDIR_SW; break;
tron@3055: 
tron@3055: 		default:
truelight@0: build_road_and_exit:
tron@3491: 			if (!CmdFailed(DoCommand(tile, rcmd, t1->index, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD))) {
tron@3055: 				_grow_town_result = -1;
tron@3055: 			}
tron@3055: 			return;
truelight@0: 	}
truelight@0: 
belugas@7067: 	/* Check if the bridge is in the right direction */
belugas@7067: 	if ((rcmd == ROAD_X && (i == DIAGDIR_NW || i == DIAGDIR_SE)) ||
belugas@7067: 			(rcmd == ROAD_Y && (i == DIAGDIR_NE || i == DIAGDIR_SW))) {
belugas@7067: 		goto build_road_and_exit;
belugas@7067: 	}
belugas@7067: 
truelight@0: 	tmptile = tile;
truelight@0: 
belugas@6918: 	/* Now it contains the direction of the slope */
rubidium@4434: 	j = -11; // max 11 tile long bridges
truelight@0: 	do {
truelight@0: 		if (++j == 0)
truelight@0: 			goto build_road_and_exit;
Darkvater@4559: 		tmptile = TILE_MASK(tmptile + TileOffsByDiagDir(i));
celestar@3433: 	} while (IsClearWaterTile(tmptile));
truelight@0: 
belugas@6918: 	/* no water tiles in between? */
truelight@0: 	if (j == -10)
truelight@0: 		goto build_road_and_exit;
truelight@0: 
belugas@6918: 	/* Quit if it selecting an appropiate bridge type fails a large number of times. */
truelight@0: 	j = 22;
truelight@0: 	{
truelight@0: 		int32 bridge_len = GetBridgeLength(tile, tmptile);
truelight@0: 		do {
truelight@0: 			byte bridge_type = RandomRange(MAX_BRIDGES - 1);
truelight@0: 			if (CheckBridge_Stuff(bridge_type, bridge_len)) {
tron@3491: 				if (!CmdFailed(DoCommand(tile, tmptile, 0x8000 + bridge_type, DC_EXEC | DC_AUTO, CMD_BUILD_BRIDGE)))
truelight@0: 					_grow_town_result = -1;
truelight@0: 
belugas@6918: 				/* obviously, if building any bridge would fail, there is no need to try other bridge-types */
truelight@0: 				return;
truelight@0: 			}
tron@2952: 		} while (--j != 0);
truelight@0: 	}
truelight@0: }
truelight@0: 
belugas@6918: /** Returns "growth" if a house was built, or no if the build failed.
belugas@6918:  * @param t town to inquiry
belugas@6918:  * @param tile to inquiry
belugas@6918:  * @return something other than zero(0)if town expansion was possible
belugas@6918:  */
tron@1977: static int GrowTownAtRoad(Town *t, TileIndex tile)
truelight@0: {
truelight@0: 	int block = 5; // special case
truelight@0: 
truelight@0: 	TILE_ASSERT(tile);
truelight@0: 
belugas@7067: 	/* Number of times to search.
belugas@7067: 	 * Better roads, 2X2 and 3X3 grid grow quite fast so we give
belugas@7067: 	 * them a little handicap. */
belugas@7067: 	switch (_patches.town_layout) {
belugas@7067: 		case TL_BETTER_ROADS:
belugas@7067: 			_grow_town_result = 10 + t->num_houses * 2 / 9;
belugas@7067: 			break;
belugas@7067: 
belugas@7067: 		case TL_3X3_GRID:
belugas@7067: 		case TL_2X2_GRID:
belugas@7067: 			_grow_town_result = 10 + t->num_houses * 1 / 9;
belugas@7067: 			break;
belugas@7067: 
belugas@7067: 		default:
belugas@7067: 			_grow_town_result = 10 + t->num_houses * 4 / 9;
belugas@7067: 			break;
belugas@7067: 	}
truelight@0: 
truelight@0: 	do {
belugas@6918: 		/* Get a bitmask of the road blocks on a tile */
tron@3150: 		RoadBits mask = GetTownRoadMask(tile);
truelight@0: 
belugas@6918: 		/* Try to grow the town from this point */
belugas@6918: 		GrowTownInTile(&tile, mask, block, t);
truelight@0: 
belugas@6918: 		/* Exclude the source position from the bitmask
belugas@6918: 		 * and return if no more road blocks available */
KUDr@6453: 		ClrBitT(mask, (block ^ 2));
truelight@0: 		if (mask == 0)
truelight@0: 			return _grow_town_result;
truelight@0: 
belugas@6918: 		/* Select a random bit from the blockmask, walk a step
belugas@6918: 		 * and continue the search from there. */
rubidium@6987: 		do block = Random() & 3; while (!HASBIT(mask, block));
tron@909: 		tile += ToTileIndexDiff(_roadblock_tileadd[block]);
truelight@0: 
truelight@1327: 		if (IsTileType(tile, MP_STREET)) {
truelight@1327: 			/* Don't allow building over roads of other cities */
tron@4077: 			if (IsTileOwner(tile, OWNER_TOWN) && GetTownByTile(tile) != t) {
truelight@1327: 				_grow_town_result = -1;
tron@4077: 			} else if (_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: 
belugas@6918: 		/* 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: 
belugas@6918: /** Generate a random road block
belugas@6918:  * The probability of a straight road
belugas@6918:  * is somewhat higher than a curved. */
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@5838: 	return (RoadBits)((1 << a) + (1 << b));
truelight@0: }
truelight@0: 
belugas@6918: /** Grow the town
belugas@6918:  * @Return true if a house was built, or no if the build failed. */
tron@2817: static bool GrowTown(Town *t)
truelight@0: {
tron@1977: 	TileIndex tile;
tron@909: 	const TileIndexDiffC *ptr;
tron@2498: 	PlayerID old_player;
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: 	};
truelight@0: 
belugas@7067: 	/* Let the town be a ghost town
belugas@7067: 	 * The player wanted it in such a way. Thus there he has it. ;)
belugas@7067: 	 * Never reached in editor mode. */
belugas@7106: 	if (_patches.town_layout == TL_NO_ROADS && _generating_world) {
belugas@7067: 		return false;
belugas@7067: 	}
belugas@7067: 
belugas@6918: 	/* Current player is a town */
truelight@260: 	old_player = _current_player;
truelight@0: 	_current_player = OWNER_TOWN;
truelight@0: 
belugas@6918: 	/* Find a road that we can base the construction on. */
truelight@0: 	tile = t->xy;
tron@909: 	for (ptr = _town_coord_mod; ptr != endof(_town_coord_mod); ++ptr) {
tron@3150: 		if (GetAnyRoadTrackBits(tile) != 0) {
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: 
belugas@6918: 	/* No road available, try to build a random road block by
belugas@6918: 	 * 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) {
maedhros@7043: 			if (!CmdFailed(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: 
truelight@0: static 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;
belugas@6918: 		/* At least very roughly extrapolate. Empirical numbers dancing between
belugas@6918: 		 * overwhelming by cottages and skyscrapers outskirts. */
pasky@470: 		t->radius[0] = mass * mass;
belugas@6918: 		/* Actually we are proportional to sqrt() but that's right because
belugas@6918: 		 * 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: {
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;
pasky@1421: 	uint16 townnametype = SPECSTR_TOWNNAME_START + _opt.town_name;
truelight@0: 
pasky@1421: 	assert(townnameparts);
truelight@0: 
tron@2952: 	for (;;) {
truelight@0: restart:
truelight@0: 		r = Random();
truelight@0: 
tron@534: 		SetDParam(0, r);
Darkvater@4912: 		GetString(buf1, townnametype, lastof(buf1));
truelight@193: 
belugas@6918: 		/* Check size and width */
Darkvater@4609: 		if (strlen(buf1) >= 31 || GetStringBoundingBox(buf1).width > 130) continue;
truelight@0: 
truelight@0: 		FOR_ALL_TOWNS(t2) {
belugas@6918: 			/* We can't just compare the numbers since
belugas@6918: 			 * 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: 
maedhros@6982: /**
maedhros@6982:  * Does the actual town creation.
maedhros@6982:  *
maedhros@6982:  * @param t The town
maedhros@6982:  * @param tile Where to put it
maedhros@6982:  * @param townnameparts The town name
maedhros@6982:  * @param size_mode How the size should be determined
maedhros@6982:  * @param size Parameter for size determination
maedhros@6982:  */
maedhros@6982: static void DoCreateTown(Town *t, TileIndex tile, uint32 townnameparts, TownSizeMode size_mode, uint size)
truelight@0: {
truelight@0: 	int x, i;
truelight@0: 
belugas@6918: 	/* clear the town struct */
truelight@0: 	i = t->index;
truelight@0: 	memset(t, 0, sizeof(Town));
truelight@0: 	t->index = i;
rubidium@5319: 	_total_towns++;
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: 
tron@2952: 	for (i = 0; i != MAX_PLAYERS; i++)
truelight@0: 		t->ratings[i] = 500;
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: 
pasky@1421: 	t->townnametype = SPECSTR_TOWNNAME_START + _opt.town_name;
pasky@1421: 	t->townnameparts = townnameparts;
truelight@193: 
truelight@0: 	UpdateTownVirtCoord(t);
truelight@0: 	_town_sort_dirty = true;
truelight@0: 
maedhros@6982: 	/* Random town size. */
maedhros@6982: 	x = (Random() & 0xF) + 8;
maedhros@6982: 
maedhros@6982: 	switch (size_mode) {
maedhros@6982: 		default: NOT_REACHED();
maedhros@6982: 
maedhros@6982: 		case TSM_RANDOM:
maedhros@6982: 			t->larger_town = false;
maedhros@6982: 			break;
maedhros@6982: 
maedhros@6982: 		case TSM_FIXED:
maedhros@6982: 			x = size * 16 + 3;
maedhros@6982: 			t->larger_town = false;
maedhros@6982: 			break;
maedhros@6982: 
maedhros@6982: 		case TSM_CITY:
maedhros@6982: 			x *= _patches.initial_city_size;
maedhros@6982: 			t->larger_town = true;
maedhros@6982: 			break;
celestar@3674: 	}
truelight@0: 
truelight@0: 	t->num_houses += x;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 
truelight@0: 	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: 
rubidium@6573: static Town *AllocateTown()
truelight@0: {
truelight@0: 	Town *t;
truelight@4346: 
truelight@4346: 	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
truelight@4346: 	 * TODO - This is just a temporary stage, this will be removed. */
tron@4983: 	for (t = GetTown(0); t != NULL; t = (t->index + 1U < GetTownPoolSize()) ? GetTown(t->index + 1U) : NULL) {
truelight@4346: 		if (!IsValidTown(t)) {
rubidium@4330: 			TownID index = t->index;
truelight@1260: 
truelight@1260: 			memset(t, 0, sizeof(Town));
truelight@1260: 			t->index = index;
truelight@1260: 
truelight@0: 			return t;
truelight@0: 		}
truelight@0: 	}
truelight@1260: 
truelight@1260: 	/* Check if we can add a block to the pool */
tron@4983: 	if (AddBlockToPool(&_Town_pool))
truelight@1260: 		return AllocateTown();
truelight@1260: 
truelight@0: 	return NULL;
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
belugas@6918:  * @param flags type of operation
maedhros@6982:  * @param p1 size of the town (0 = small, 1 = medium, 2 = large)
maedhros@6982:  * @param p2 size mode (@see TownSizeMode)
Darkvater@1793:  */
tron@3491: int32 CmdBuildTown(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Town *t;
pasky@1421: 	uint32 townnameparts;
truelight@193: 
Darkvater@1793: 	/* Only in the scenario editor */
Darkvater@1793: 	if (_game_mode != GM_EDITOR) return CMD_ERROR;
maedhros@6982: 	if (p2 > TSM_CITY) return CMD_ERROR;
Darkvater@1793: 
truelight@0: 	SET_EXPENSES_TYPE(EXPENSES_OTHER);
truelight@0: 
belugas@6918: 	/* 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: 
belugas@6918: 	/* 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: 
belugas@6918: 	/* 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: 
belugas@6918: 	/* Get a unique name for the town. */
pasky@1421: 	if (!CreateTownName(&townnameparts))
pasky@1421: 		return_cmd_error(STR_023A_TOO_MANY_TOWNS);
pasky@1421: 
belugas@6918: 	/* Allocate town struct */
truelight@0: 	t = AllocateTown();
Darkvater@1793: 	if (t == NULL) return_cmd_error(STR_023A_TOO_MANY_TOWNS);
truelight@0: 
belugas@6918: 	/* Create the town */
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		_generating_world = true;
maedhros@6982: 		DoCreateTown(t, tile, townnameparts, (TownSizeMode)p2, p1);
truelight@0: 		_generating_world = false;
truelight@0: 	}
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
maedhros@6982: Town *CreateRandomTown(uint attempts, TownSizeMode mode, uint size)
truelight@0: {
tron@1977: 	TileIndex tile;
truelight@0: 	Town *t;
pasky@1421: 	uint32 townnameparts;
truelight@0: 
truelight@0: 	do {
belugas@6918: 		/* Generate a tile index not too close from the edge */
ludde@2051: 		tile = RandomTile();
tron@2951: 		if (DistanceFromEdge(tile) < 20) continue;
truelight@0: 
belugas@6918: 		/* Make sure the tile is plain */
tron@3636: 		if (!IsTileType(tile, MP_CLEAR) || GetTileSlope(tile, NULL) != SLOPE_FLAT) continue;
truelight@0: 
belugas@6918: 		/* Check not too close to a town */
tron@2951: 		if (IsCloseToTown(tile, 20)) continue;
truelight@193: 
belugas@6918: 		/* Get a unique name for the town. */
tron@2951: 		if (!CreateTownName(&townnameparts)) break;
pasky@1421: 
belugas@6918: 		/* Allocate a town struct */
truelight@0: 		t = AllocateTown();
tron@2951: 		if (t == NULL) break;
truelight@0: 
maedhros@6982: 		DoCreateTown(t, tile, townnameparts, mode, size);
truelight@0: 		return t;
celestar@1362: 	} while (--attempts);
truelight@0: 	return NULL;
truelight@0: }
truelight@0: 
belugas@7056: 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));
maedhros@6982: 	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);
belugas@6918: 		/* try 20 times to create a random-sized town for the first loop. */
maedhros@6982: 		TownSizeMode mode = num_cities > 0 ? TSM_CITY : TSM_RANDOM;
maedhros@6982: 		if (CreateRandomTown(20, mode, _patches.initial_city_size) != NULL) num++;
maedhros@6982: 		if (num_cities > 0) num_cities--;
celestar@1362: 	} while (--n);
celestar@1362: 
belugas@6918: 	/* give it a last try, but now more aggressive */
maedhros@6982: 	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: 
tron@3636: static bool CheckBuildHouseMode(TileIndex tile, Slope tileh, int mode)
tron@1977: {
truelight@0: 	int b;
tron@3636: 	Slope slope;
truelight@0: 
truelight@0: 	static const byte _masks[8] = {
truelight@0: 		0xC,0x3,0x9,0x6,
truelight@0: 		0x3,0xC,0x6,0x9,
truelight@0: 	};
truelight@0: 
truelight@0: 	slope = GetTileSlope(tile, NULL);
tron@3636: 	if (IsSteepSlope(slope)) return false;
truelight@0: 
celestar@5573: 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return false;
celestar@5573: 
truelight@0: 	b = 0;
tron@3636: 	if ((slope != SLOPE_FLAT && ~slope & _masks[mode])) b = ~b;
tron@3636: 	if ((tileh != SLOPE_FLAT && ~tileh & _masks[mode+4])) b = ~b;
truelight@0: 	if (b)
truelight@0: 		return false;
truelight@0: 
tron@3491: 	return !CmdFailed(DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
truelight@0: }
truelight@0: 
tron@4000: 
tron@4000: uint GetTownRadiusGroup(const Town* t, TileIndex tile)
truelight@0: {
tron@4000: 	uint dist = DistanceSquare(tile, t->xy);
tron@4000: 	uint smallest;
tron@4000: 	uint i;
truelight@0: 
tron@4000: 	if (t->fund_buildings_months && dist <= 25) return 4;
truelight@0: 
truelight@0: 	smallest = 0;
Darkvater@2436: 	for (i = 0; i != lengthof(t->radius); i++) {
tron@4000: 		if (dist < t->radius[i]) smallest = i;
truelight@0: 	}
truelight@0: 
truelight@0: 	return smallest;
truelight@0: }
truelight@0: 
tron@2958: static bool CheckFree2x2Area(TileIndex tile)
truelight@0: {
truelight@0: 	int i;
truelight@0: 
tron@909: 	static const TileIndexDiffC _tile_add[] = {
tron@909: 		{0    , 0    },
tron@909: 		{0 - 0, 1 - 0},
tron@909: 		{1 - 0, 0 - 1},
tron@909: 		{1 - 1, 1 - 0}
truelight@0: 	};
truelight@0: 
tron@2952: 	for (i = 0; i != 4; i++) {
tron@909: 		tile += ToTileIndexDiff(_tile_add[i]);
truelight@0: 
tron@3636: 		if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return false;
truelight@0: 
celestar@5573: 		if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return false;
celestar@5573: 
tron@3491: 		if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER | DC_FORCETEST, CMD_LANDSCAPE_CLEAR)))
truelight@0: 			return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
tron@1977: static void DoBuildTownHouse(Town *t, TileIndex tile)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	uint bitmask;
maedhros@6658: 	HouseID house;
tron@3636: 	Slope slope;
tron@1335: 	uint z;
belugas@3432: 	uint oneof = 0;
maedhros@6658: 	HouseSpec *hs;
truelight@193: 
belugas@6918: 	/* Above snow? */
truelight@0: 	slope = GetTileSlope(tile, &z);
truelight@0: 
belugas@6918: 	/* Get the town zone type */
truelight@0: 	{
truelight@0: 		uint rad = GetTownRadiusGroup(t, tile);
truelight@0: 
truelight@0: 		int land = _opt.landscape;
belugas@6683: 		if (land == LT_ARCTIC && z >= _opt.snow_line) land = -1;
truelight@0: 
truelight@0: 		bitmask = (1 << rad) + (1 << (land + 12));
truelight@0: 	}
truelight@0: 
belugas@6918: 	/* bits 0-4 are used
belugas@6918: 	 * bits 11-15 are used
belugas@6918: 	 * bits 5-10 are not used. */
truelight@0: 	{
maedhros@6658: 		HouseID houses[HOUSE_MAX];
truelight@0: 		int num = 0;
maedhros@6658: 		uint cumulative_probs[HOUSE_MAX];
maedhros@6658: 		uint probability_max = 0;
truelight@0: 
belugas@6918: 		/* Generate a list of all possible houses that can be built. */
maedhros@6658: 		for (i = 0; i < HOUSE_MAX; i++) {
maedhros@6658: 			hs = GetHouseSpecs(i);
maedhros@6658: 			if ((~hs->building_availability & bitmask) == 0 && hs->enabled) {
maedhros@6658: 				if (_have_newhouses) {
maedhros@6658: 					probability_max += hs->probability;
maedhros@6658: 					cumulative_probs[num] = probability_max;
maedhros@6658: 				}
maedhros@6658: 				houses[num++] = (HouseID)i;
maedhros@6658: 			}
truelight@0: 		}
truelight@0: 
tron@2952: 		for (;;) {
maedhros@6658: 			if (_have_newhouses) {
maedhros@6658: 				uint r = RandomRange(probability_max);
maedhros@6658: 				for (i = 0; i < num; i++) if (cumulative_probs[i] >= r) break;
truelight@0: 
maedhros@6658: 				house = houses[i];
maedhros@6658: 			} else {
maedhros@6658: 				house = houses[RandomRange(num)];
maedhros@6658: 			}
maedhros@6658: 
maedhros@6658: 			hs = GetHouseSpecs(house);
maedhros@6658: 
maedhros@6658: 			if (_have_newhouses) {
maedhros@6658: 				if (hs->override != 0) hs = GetHouseSpecs(hs->override);
maedhros@6658: 
maedhros@6658: 				if ((hs->extra_flags & BUILDING_IS_HISTORICAL) && !_generating_world) continue;
maedhros@6658: 
maedhros@6658: 				if (HASBIT(hs->callback_mask, CBM_HOUSE_ALLOW_CONSTRUCTION)) {
maedhros@6658: 					uint16 callback_res = GetHouseCallback(CBID_HOUSE_ALLOW_CONSTRUCTION, 0, house, t, tile);
maedhros@6658: 					if (callback_res != CALLBACK_FAILED && callback_res == 0) continue;
maedhros@6658: 				}
maedhros@6658: 			}
maedhros@6658: 
maedhros@6658: 			if (_cur_year < hs->min_date || _cur_year > hs->max_date) continue;
truelight@0: 
belugas@6918: 			/* Special houses that there can be only one of. */
maedhros@6658: 			if (hs->building_flags & BUILDING_IS_CHURCH) {
maedhros@6658: 				SETBIT(oneof, TOWN_HAS_CHURCH);
maedhros@6658: 			} else if (hs->building_flags & BUILDING_IS_STADIUM) {
maedhros@6658: 				SETBIT(oneof, TOWN_HAS_STADIUM);
maedhros@6658: 			} else {
maedhros@6658: 				oneof = 0;
tron@483: 			}
truelight@0: 
belugas@3432: 			if (HASBITS(t->flags12 , oneof)) continue;
truelight@0: 
belugas@6918: 			/* Make sure there is no slope? */
maedhros@6658: 			if (hs->building_flags & TILE_NOT_SLOPED && slope != SLOPE_FLAT) continue;
truelight@193: 
maedhros@6658: 			if (hs->building_flags & TILE_SIZE_2x2) {
tron@2958: 				if (CheckFree2x2Area(tile) ||
tron@2958: 						CheckFree2x2Area(tile += TileDiffXY(-1,  0)) ||
tron@2958: 						CheckFree2x2Area(tile += TileDiffXY( 0, -1)) ||
tron@2958: 						CheckFree2x2Area(tile += TileDiffXY( 1,  0))) {
tron@1981: 					break;
tron@2951: 				}
tron@2951: 				tile += TileDiffXY(0, 1);
maedhros@6658: 			} else if (hs->building_flags & TILE_SIZE_2x1) {
tron@2958: 				if (CheckBuildHouseMode(tile + TileDiffXY(1, 0), slope, 0)) break;
truelight@193: 
tron@2958: 				if (CheckBuildHouseMode(tile + TileDiffXY(-1, 0), slope, 1)) {
tron@1981: 					tile += TileDiffXY(-1, 0);
truelight@0: 					break;
truelight@0: 				}
maedhros@6658: 			} else if (hs->building_flags & TILE_SIZE_1x2) {
tron@2958: 				if (CheckBuildHouseMode(tile + TileDiffXY(0, 1), slope, 2)) break;
truelight@0: 
tron@2958: 				if (CheckBuildHouseMode(tile + TileDiffXY(0, -1), slope, 3)) {
tron@1981: 					tile += TileDiffXY(0, -1);
truelight@0: 					break;
truelight@0: 				}
tron@2951: 			} else {
truelight@0: 				break;
tron@2951: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	t->num_houses++;
maedhros@6658: 	IncreaseBuildingCount(t, house);
truelight@0: 
belugas@6918: 	/* Special houses that there can be only one of. */
truelight@0: 	t->flags12 |= oneof;
truelight@193: 
truelight@0: 	{
maedhros@6658: 		byte construction_counter = 0, construction_stage = 0;
truelight@0: 
truelight@0: 		if (_generating_world) {
truelight@0: 			uint32 r = Random();
truelight@193: 
belugas@3432: 			construction_stage = TOWN_HOUSE_COMPLETED;
celestar@3382: 			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: 		}
maedhros@6658: 		MakeTownHouse(tile, t->index, construction_counter, construction_stage, house, VehicleRandomBits());
truelight@0: 	}
truelight@0: }
truelight@0: 
tron@1977: static bool BuildTownHouse(Town *t, TileIndex tile)
truelight@0: {
truelight@0: 	int32 r;
truelight@193: 
tron@3636: 	if (IsSteepSlope(GetTileSlope(tile, NULL))) return false;
celestar@5573: 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return false;
truelight@0: 
tron@3491: 	r = DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_LANDSCAPE_CLEAR);
peter1138@2737: 	if (CmdFailed(r)) return false;
truelight@0: 
truelight@0: 	DoBuildTownHouse(t, tile);
truelight@0: 	return true;
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: {
maedhros@6658: 	HouseID house = GetHouseType(tile);
truelight@0: 	uint eflags;
maedhros@6658: 	HouseSpec *hs;
truelight@0: 
tron@1035: 	assert(IsTileType(tile, MP_HOUSE));
truelight@0: 
belugas@6918: 	/* 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: 
maedhros@6658: 	hs = GetHouseSpecs(house);
maedhros@6658: 
belugas@6918: 	/* 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: 
belugas@6918: 	/* Clear flags for houses that only may exist once/town. */
maedhros@6658: 	if (hs->building_flags & BUILDING_IS_CHURCH) {
maedhros@6658: 		CLRBIT(t->flags12, TOWN_HAS_CHURCH);
maedhros@6658: 	} else if (hs->building_flags & BUILDING_IS_STADIUM) {
maedhros@6658: 		CLRBIT(t->flags12, TOWN_HAS_STADIUM);
tron@483: 	}
truelight@193: 
belugas@6918: 	/* Do the actual clearing of tiles */
maedhros@6658: 	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: 
Darkvater@1793: /** Rename a town (server-only).
tron@3491:  * @param tile unused
belugas@6918:  * @param flags type of operation
Darkvater@1793:  * @param p1 town ID to rename
Darkvater@1793:  * @param p2 unused
Darkvater@1793:  */
tron@3491: int32 CmdRenameTown(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	StringID str;
Darkvater@1793: 	Town *t;
Darkvater@1793: 
truelight@4352: 	if (!IsValidTownID(p1) || _cmd_text[0] == '\0') return CMD_ERROR;
Darkvater@1793: 
Darkvater@1793: 	t = GetTown(p1);
truelight@193: 
tron@1820: 	str = AllocateNameUnique(_cmd_text, 4);
Darkvater@1793: 	if (str == 0) return CMD_ERROR;
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
Darkvater@1793: 		DeleteName(t->townnametype);
truelight@0: 		t->townnametype = str;
truelight@0: 
truelight@0: 		UpdateTownVirtCoord(t);
truelight@0: 		_town_sort_dirty = true;
truelight@0: 		UpdateAllStationVirtCoord();
truelight@0: 		MarkWholeScreenDirty();
truelight@0: 	} else {
truelight@0: 		DeleteName(str);
truelight@0: 	}
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
belugas@6918: /** Called from GUI */
truelight@0: void ExpandTown(Town *t)
truelight@0: {
truelight@0: 	int amount, n;
truelight@0: 
truelight@0: 	_generating_world = true;
truelight@193: 
truelight@835: 	/* The more houses, the faster we grow */
truelight@835: 	amount = RandomRange(t->num_houses / 10) + 3;
truelight@0: 	t->num_houses += amount;
truelight@0: 	UpdateTownRadius(t);
truelight@0: 
truelight@835: 	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: 
tron@3877: static void TownActionAdvertiseSmall(Town* t)
truelight@0: {
tron@3877: 	ModifyStationRatingAround(t->xy, _current_player, 0x40, 10);
truelight@0: }
truelight@0: 
tron@3877: static void TownActionAdvertiseMedium(Town* t)
tron@3877: {
tron@3877: 	ModifyStationRatingAround(t->xy, _current_player, 0x70, 15);
tron@3877: }
tron@3877: 
tron@3877: static void TownActionAdvertiseLarge(Town* t)
tron@3877: {
tron@3877: 	ModifyStationRatingAround(t->xy, _current_player, 0xA0, 20);
tron@3877: }
tron@3877: 
tron@3877: static void TownActionRoadRebuild(Town* t)
truelight@0: {
tron@2548: 	const Player* p;
truelight@0: 
truelight@0: 	t->road_build_months = 6;
truelight@193: 
tron@534: 	SetDParam(0, t->index);
truelight@0: 
celestar@1962: 	p = GetPlayer(_current_player);
tron@534: 	SetDParam(1, p->name_1);
tron@534: 	SetDParam(2, p->name_2);
truelight@0: 
truelight@193: 	AddNewsItem(STR_2055_TRAFFIC_CHAOS_IN_ROAD_REBUILDING,
truelight@0: 		NEWS_FLAGS(NM_NORMAL, NF_TILE, NT_GENERAL, 0), t->xy, 0);
truelight@0: }
truelight@0: 
truelight@6583: static bool DoBuildStatueOfCompany(TileIndex tile, TownID town_id)
truelight@0: {
tron@2498: 	PlayerID old;
truelight@0: 	int32 r;
truelight@0: 
tron@3636: 	if (GetTileSlope(tile, NULL) != SLOPE_FLAT) 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: 
truelight@0: 	old = _current_player;
truelight@0: 	_current_player = OWNER_NONE;
tron@3491: 	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
belugas@6980:  * @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:  */
tron@3877: static void TownActionBuildStatue(Town* t)
truelight@0: {
tron@1977: 	TileIndex tile = t->xy;
truelight@0: 
truelight@6583: 	if (CircularTileSearch(tile, 9, SearchTileForStatue, t->index))
belugas@6918: 		SETBIT(t->statues, _current_player); // Once found and built, "inform" the Town
truelight@0: }
truelight@0: 
tron@3877: static void TownActionFundBuildings(Town* t)
truelight@0: {
belugas@6918: 	/* Build next tick */
truelight@0: 	t->grow_counter = 1;
belugas@6918: 	/* If we were not already growing */
belugas@3432: 	SETBIT(t->flags12, TOWN_IS_FUNDED);
belugas@6918: 	/* And grow for 3 months */
truelight@0: 	t->fund_buildings_months = 3;
truelight@0: }
truelight@0: 
tron@3877: static void TownActionBuyRights(Town* t)
truelight@0: {
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: 
tron@3877: static void TownActionBribe(Town* t)
truelight@0: {
truelight@0: 	if (!RandomRange(15)) {
truelight@0: 		Station *st;
truelight@0: 
belugas@6918: 		/* set as unwanted for 6 months */
truelight@0: 		t->unwanted[_current_player] = 6;
truelight@0: 
belugas@6918: 		/* set all close by station ratings to 0 */
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: 
belugas@6918: 		/* only show errormessage to the executing player. All errors are handled command.c
belugas@6918: 		 * 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: 
tron@3877: typedef void TownActionProc(Town* t);
truelight@0: 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
belugas@6918:  * @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:  */
tron@3491: int32 CmdDoTownAction(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	int32 cost;
Darkvater@1793: 	Town *t;
Darkvater@1793: 
truelight@4352: 	if (!IsValidTownID(p1) || p2 > lengthof(_town_action_proc)) return CMD_ERROR;
Darkvater@1793: 
Darkvater@1793: 	t = GetTown(p1);
Darkvater@1793: 
Darkvater@1793: 	if (!HASBIT(GetMaskOfTownActions(NULL, _current_player, t), p2)) return CMD_ERROR;
truelight@0: 
truelight@0: 	SET_EXPENSES_TYPE(EXPENSES_OTHER);
truelight@0: 
truelight@0: 	cost = (_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: {
truelight@0: 	int n;
truelight@0: 	Station *st;
maedhros@6950: 	uint16 m;
truelight@0: 	Player *p;
truelight@0: 
belugas@6918: 	/* Reset player ratings if they're low */
truelight@0: 	FOR_ALL_PLAYERS(p) {
truelight@0: 		if (p->is_active && t->ratings[p->index] <= 200) {
truelight@0: 			t->ratings[p->index] += 5;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	n = 0;
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++;
Darkvater@4850: 				if (IsValidPlayer(st->owner) && t->ratings[st->owner] <= 1000-12)
truelight@0: 					t->ratings[st->owner] += 12;
truelight@0: 			} else {
Darkvater@4850: 				if (IsValidPlayer(st->owner) && t->ratings[st->owner] >= -1000+15)
truelight@0: 					t->ratings[st->owner] -= 15;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: 
belugas@3432: 	CLRBIT(t->flags12, TOWN_IS_FUNDED);
maedhros@6951: 	if (_patches.town_growth_rate == 0 && t->fund_buildings_months == 0) return;
maedhros@6950: 
maedhros@6950: 	/** Towns are processed every TOWN_GROWTH_FREQUENCY ticks, and this is the
maedhros@6950: 	 * number of times towns are processed before a new building is built. */
maedhros@6950: 	static const uint16 _grow_count_values[2][6] = {
maedhros@6950: 		{ 120, 120, 120, 100,  80,  60 }, ///< Fund new buildings has been activated
maedhros@6950: 		{ 320, 420, 300, 220, 160, 100 }  ///< Normal values
maedhros@6950: 	};
truelight@0: 
truelight@0: 	if (t->fund_buildings_months != 0) {
maedhros@6950: 		m = _grow_count_values[0][min(n, 5)];
truelight@0: 		t->fund_buildings_months--;
truelight@0: 	} else {
maedhros@6950: 		m = _grow_count_values[1][min(n, 5)];
maedhros@6950: 		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: 
maedhros@6951: 	/* Use the normal growth rate values if new buildings have been funded in
maedhros@6951: 	 * this town and the growth rate is set to none. */
maedhros@6951: 	uint growth_multiplier = _patches.town_growth_rate != 0 ? _patches.town_growth_rate - 1 : 1;
maedhros@6951: 
maedhros@6951: 	m >>= growth_multiplier;
maedhros@6982: 	if (t->larger_town) m /= 2;
maedhros@6950: 
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: 
belugas@3432: 	SETBIT(t->flags12, TOWN_IS_FUNDED);
truelight@0: }
truelight@0: 
truelight@0: static void UpdateTownAmounts(Town *t)
truelight@0: {
belugas@6918: 	/* 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: 
belugas@6918: 	/* 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: {
tron@4000: 	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: {
truelight@0: 	Town *t;
truelight@0: 
Darkvater@4850: 	if (!IsValidPlayer(_current_player)) return true;
truelight@0: 
truelight@0: 	t = ClosestTownFromTile(tile, _patches.dist_local_authority);
tron@4000: 	if (t == NULL) return true;
truelight@0: 
tron@4000: 	if (t->ratings[_current_player] > -200) 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: 
tron@3983: Town* CalcClosestTownFromTile(TileIndex tile, uint threshold)
truelight@0: {
truelight@0: 	Town *t;
truelight@0: 	uint dist, best = threshold;
truelight@0: 	Town *best_town = NULL;
truelight@193: 
truelight@0: 	FOR_ALL_TOWNS(t) {
truelight@4346: 		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) || (
tron@3983: 				IsTileType(tile, MP_STREET) &&
tron@3983: 				(IsLevelCrossing(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile)) == OWNER_TOWN
tron@3983: 			)) {
tron@3983: 		return GetTownByTile(tile);
tron@3983: 	} else {
tron@3983: 		return CalcClosestTownFromTile(tile, threshold);
tron@3983: 	}
tron@3983: }
tron@3983: 
tron@3983: 
truelight@0: void ChangeTownRating(Town *t, int add, int max)
truelight@0: {
truelight@0: 	int rating;
truelight@0: 
belugas@6918: 	/* 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: 
truelight@0: 	SETBIT(t->have_ratings, _current_player);
truelight@193: 
truelight@0: 	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: 	}
truelight@0: 	t->ratings[_current_player] = rating;
truelight@0: }
truelight@0: 
rubidium@4434: /* penalty for removing town-owned stuff */
truelight@0: static const int _default_rating_settings [3][3] = {
belugas@6918: 	/* ROAD_REMOVE, TUNNELBRIDGE_REMOVE, INDUSTRY_REMOVE */
belugas@6918: 	{  0, 128, 384}, ///< Permissive
belugas@6918: 	{ 48, 192, 480}, ///< Neutral
belugas@6918: 	{ 96, 384, 768}, ///< Hostile
truelight@0: };
truelight@0: 
tron@2958: bool CheckforTownRating(uint32 flags, Town *t, byte type)
truelight@0: {
truelight@0: 	int modemod;
truelight@0: 
belugas@6918: 	/* 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: 	 */
Darkvater@1500: 	modemod = _default_rating_settings[_opt.diff.town_council_tolerance][type];
truelight@0: 
truelight@0: 	if (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@0: 	Subsidy *s;
truelight@0: 
truelight@1260: 	/* Clean the town pool and create 1 block in it */
tron@4983: 	CleanPool(&_Town_pool);
tron@4983: 	AddBlockToPool(&_Town_pool);
truelight@0: 
truelight@0: 	memset(_subsidies, 0, sizeof(_subsidies));
truelight@0: 	for (s=_subsidies; s != endof(_subsidies); s++)
tron@2469: 		s->cargo_type = CT_INVALID;
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@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 */
rubidium@4344: 	NULL,                    /* get_produced_cargo_proc */
rubidium@4344: 	NULL,                    /* vehicle_enter_tile_proc */
rubidium@4344: 	GetSlopeTileh_Town,      /* get_slope_tileh_proc */
truelight@0: };
truelight@0: 
truelight@0: 
belugas@6918: /** 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: 
rubidium@4344: 	SLE_CONDVAR(Town, population,            SLE_FILE_U16 | SLE_VAR_U32, 0, 2),
rubidium@4344: 	SLE_CONDVAR(Town, population,            SLE_UINT32,                 3, SL_MAX_VERSION),
truelight@0: 
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, num_houses,            SLE_UINT16),
rubidium@4344: 	    SLE_VAR(Town, townnametype,          SLE_UINT16),
rubidium@4344: 	    SLE_VAR(Town, townnameparts,         SLE_UINT32),
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, flags12,               SLE_UINT8),
rubidium@4344: 	    SLE_VAR(Town, statues,               SLE_UINT8),
truelight@0: 
belugas@6918: 	/* sort_index_obsolete was stored here in savegame format 0 - 1 */
Darkvater@3222: 	SLE_CONDNULL(1, 0, 1),
truelight@0: 
rubidium@4344: 	    SLE_VAR(Town, have_ratings,          SLE_UINT8),
rubidium@4344: 	    SLE_ARR(Town, ratings,               SLE_INT16, 8),
belugas@6918: 	/* failed bribe attempts are stored since savegame format 4 */
rubidium@4344: 	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: 
maedhros@6950: 	SLE_CONDVAR(Town, time_until_rebuild,    SLE_UINT8,                  0, 53),
maedhros@6950: 	SLE_CONDVAR(Town, grow_counter,          SLE_UINT8,                  0, 53),
maedhros@6950: 	SLE_CONDVAR(Town, growth_rate,           SLE_UINT8,                  0, 53),
maedhros@6950: 
maedhros@6950: 	SLE_CONDVAR(Town, time_until_rebuild,    SLE_UINT16,                 54, SL_MAX_VERSION),
maedhros@6950: 	SLE_CONDVAR(Town, grow_counter,          SLE_UINT16,                 54, SL_MAX_VERSION),
maedhros@6950: 	SLE_CONDVAR(Town, growth_rate,           SLE_INT16,                  54, SL_MAX_VERSION),
maedhros@6950: 
rubidium@4344: 	    SLE_VAR(Town, fund_buildings_months, SLE_UINT8),
rubidium@4344: 	    SLE_VAR(Town, road_build_months,     SLE_UINT8),
rubidium@4344: 
rubidium@4344: 	    SLE_VAR(Town, exclusivity,           SLE_UINT8),
rubidium@4344: 	    SLE_VAR(Town, exclusive_counter,     SLE_UINT8),
maedhros@6982: 
maedhros@6982: 	SLE_CONDVAR(Town, larger_town,           SLE_BOOL,                  56, SL_MAX_VERSION),
maedhros@6982: 
belugas@6918: 	/* 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[] = {
maedhros@6658: 	SLE_VAR(HouseIDMapping, grfid,         SLE_UINT32),
maedhros@6658: 	SLE_VAR(HouseIDMapping, house_id,      SLE_UINT8),
maedhros@6658: 	SLE_VAR(HouseIDMapping, substitute_id, SLE_UINT8),
maedhros@6658: 	SLE_END()
maedhros@6658: };
maedhros@6658: 
maedhros@6658: static void Save_HOUSEIDS()
maedhros@6658: {
maedhros@6658: 	uint i;
maedhros@6658: 
maedhros@6658: 	for (i = 0; i != lengthof(_house_id_mapping); i++) {
maedhros@6658: 		SlSetArrayIndex(i);
maedhros@6658: 		SlObject(&_house_id_mapping[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: 
maedhros@6658: 	ResetHouseIDMapping();
maedhros@6658: 
maedhros@6658: 	while ((index = SlIterateArray()) != -1) {
maedhros@6658: 		if ((uint)index >= lengthof(_house_id_mapping)) break;
maedhros@6658: 		SlObject(&_house_id_mapping[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) {
truelight@1260: 		Town *t;
truelight@1260: 
tron@4983: 		if (!AddBlockIfNeeded(&_Town_pool, index))
truelight@1260: 			error("Towns: failed loading savegame: too many towns");
truelight@1260: 
truelight@1260: 		t = GetTown(index);
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: {
truelight@0: 	Town *t;
truelight@0: 	FOR_ALL_TOWNS(t) {
truelight@4346: 		UpdateTownRadius(t);
truelight@4346: 		UpdateTownVirtCoord(t);
truelight@0: 	}
truelight@0: 	_town_sort_dirty = true;
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));
maedhros@6658: }