Fix compiler warnings.

[openttd-joker.git] / src / industry_cmd.cpp

/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file industry_cmd.cpp Handling of industry tiles. */

#include "stdafx.h"
#include "clear_map.h"
#include "industry.h"
#include "station_base.h"
#include "landscape.h"
#include "viewport_func.h"
#include "command_func.h"
#include "town.h"
#include "news_func.h"
#include "cheat_type.h"
#include "genworld.h"
#include "tree_map.h"
#include "tunnel_map.h"
#include "newgrf_cargo.h"
#include "newgrf_debug.h"
#include "newgrf_industrytiles.h"
#include "autoslope.h"
#include "water.h"
#include "strings_func.h"
#include "window_func.h"
#include "date_func.h"
#include "vehicle_func.h"
#include "sound_func.h"
#include "animated_tile_func.h"
#include "effectvehicle_func.h"
#include "effectvehicle_base.h"
#include "ai/ai.hpp"
#include "core/pool_func.hpp"
#include "subsidy_func.h"
#include "core/backup_type.hpp"
#include "object_base.h"
#include "game/game.hpp"
#include "error.h"

#include "table/strings.h"
#include "table/industry_land.h"
#include "table/build_industry.h"

#include "safeguards.h"

IndustryPool _industry_pool("Industry");
INSTANTIATE_POOL_METHODS(Industry)

void ShowIndustryViewWindow(int industry);
void BuildOilRig(TileIndex tile);

static byte _industry_sound_ctr;
static TileIndex _industry_sound_tile;

uint16 Industry::counts[NUM_INDUSTRYTYPES];

IndustrySpec _industry_specs[NUM_INDUSTRYTYPES];
IndustryTileSpec _industry_tile_specs[NUM_INDUSTRYTILES];
IndustryBuildData _industry_builder; ///< In-game manager of industries.

/**
 * This function initialize the spec arrays of both
 * industry and industry tiles.
 * It adjusts the enabling of the industry too, based on climate availability.
 * This will allow for clearer testings
 */
void ResetIndustries()
{
        memset(&_industry_specs, 0, sizeof(_industry_specs));
        memcpy(&_industry_specs, &_origin_industry_specs, sizeof(_origin_industry_specs));

        /* once performed, enable only the current climate industries */
        for (IndustryType i = 0; i < NUM_INDUSTRYTYPES; i++) {
                _industry_specs[i].enabled = i < NEW_INDUSTRYOFFSET &&
                                HasBit(_origin_industry_specs[i].climate_availability, _settings_game.game_creation.landscape);
        }

        memset(&_industry_tile_specs, 0, sizeof(_industry_tile_specs));
        memcpy(&_industry_tile_specs, &_origin_industry_tile_specs, sizeof(_origin_industry_tile_specs));

        /* Reset any overrides that have been set. */
        _industile_mngr.ResetOverride();
        _industry_mngr.ResetOverride();
}

/**
 * Retrieve the type for this industry.  Although it is accessed by a tile,
 * it will return the general type of industry, and not the sprite index
 * as would do GetIndustryGfx.
 * @param tile that is queried
 * @pre IsTileType(tile, MP_INDUSTRY)
 * @return general type for this industry, as defined in industry.h
 */
IndustryType GetIndustryType(TileIndex tile)
{
        assert(IsTileType(tile, MP_INDUSTRY));

        const Industry *ind = Industry::GetByTile(tile);
        assert(ind != NULL);
        return ind->type;
}

/**
 * Accessor for array _industry_specs.
 * This will ensure at once : proper access and
 * not allowing modifications of it.
 * @param thistype of industry (which is the index in _industry_specs)
 * @pre thistype < NUM_INDUSTRYTYPES
 * @return a pointer to the corresponding industry spec
 */
const IndustrySpec *GetIndustrySpec(IndustryType thistype)
{
        assert(thistype < NUM_INDUSTRYTYPES);
        return &_industry_specs[thistype];
}

/**
 * Accessor for array _industry_tile_specs.
 * This will ensure at once : proper access and
 * not allowing modifications of it.
 * @param gfx of industrytile (which is the index in _industry_tile_specs)
 * @pre gfx < INVALID_INDUSTRYTILE
 * @return a pointer to the corresponding industrytile spec
 */
const IndustryTileSpec *GetIndustryTileSpec(IndustryGfx gfx)
{
        assert(gfx < INVALID_INDUSTRYTILE);
        return &_industry_tile_specs[gfx];
}

Industry::~Industry()
{
        if (CleaningPool()) return;

        /* Industry can also be destroyed when not fully initialized.
         * This means that we do not have to clear tiles either.
         * Also we must not decrement industry counts in that case. */
        if (this->location.w == 0) return;

        TILE_AREA_LOOP(tile_cur, this->location) {
                if (IsTileType(tile_cur, MP_INDUSTRY)) {
                        if (GetIndustryIndex(tile_cur) == this->index) {
                                DeleteNewGRFInspectWindow(GSF_INDUSTRYTILES, tile_cur);

                                /* MakeWaterKeepingClass() can also handle 'land' */
                                MakeWaterKeepingClass(tile_cur, OWNER_NONE);
                        }
                } else if (IsTileType(tile_cur, MP_STATION) && IsOilRig(tile_cur)) {
                        DeleteOilRig(tile_cur);
                }
        }

        if (GetIndustrySpec(this->type)->behaviour & INDUSTRYBEH_PLANT_FIELDS) {
                TileArea ta(this->location.tile - TileDiffXY(min(TileX(this->location.tile), 21), min(TileY(this->location.tile), 21)), 42, 42);
                ta.ClampToMap();

                /* Remove the farmland and convert it to regular tiles over time. */
                TILE_AREA_LOOP(tile_cur, ta) {
                        if (IsTileType(tile_cur, MP_CLEAR) && IsClearGround(tile_cur, CLEAR_FIELDS) &&
                                        GetIndustryIndexOfField(tile_cur) == this->index) {
                                SetIndustryIndexOfField(tile_cur, INVALID_INDUSTRY);
                        }
                }
        }

        /* don't let any disaster vehicle target invalid industry */
        ReleaseDisastersTargetingIndustry(this->index);

        /* Clear the persistent storage. */
        delete this->psa;

        DecIndustryTypeCount(this->type);

        DeleteIndustryNews(this->index);
        DeleteWindowById(WC_INDUSTRY_VIEW, this->index);
        DeleteNewGRFInspectWindow(GSF_INDUSTRIES, this->index);

        DeleteSubsidyWith(ST_INDUSTRY, this->index);
        CargoPacket::InvalidateAllFrom(ST_INDUSTRY, this->index);
}

/**
 * Invalidating some stuff after removing item from the pool.
 * @param index index of deleted item
 */
void Industry::PostDestructor(size_t index)
{
        InvalidateWindowData(WC_INDUSTRY_DIRECTORY, 0, 0);
        Station::RecomputeIndustriesNearForAll();
}


/**
 * Return a random valid industry.
 * @return random industry, NULL if there are no industries
 */
/* static */ Industry *Industry::GetRandom()
{
        if (Industry::GetNumItems() == 0) return NULL;
        int num = RandomRange((uint16)Industry::GetNumItems());
        size_t index = MAX_UVALUE(size_t);

        while (num >= 0) {
                num--;
                index++;

                /* Make sure we have a valid industry */
                while (!Industry::IsValidID(index)) {
                        index++;
                        assert(index < Industry::GetPoolSize());
                }
        }

        return Industry::Get(index);
}


static void IndustryDrawSugarMine(const TileInfo *ti)
{
        if (!IsIndustryCompleted(ti->tile)) return;

        const DrawIndustryAnimationStruct *d = &_draw_industry_spec1[GetAnimationFrame(ti->tile)];

        AddChildSpriteScreen(SPR_IT_SUGAR_MINE_SIEVE + d->image_1, PAL_NONE, d->x, 0);

        if (d->image_2 != 0) {
                AddChildSpriteScreen(SPR_IT_SUGAR_MINE_CLOUDS + d->image_2 - 1, PAL_NONE, 8, 41);
        }

        if (d->image_3 != 0) {
                AddChildSpriteScreen(SPR_IT_SUGAR_MINE_PILE + d->image_3 - 1, PAL_NONE,
                        _drawtile_proc1[d->image_3 - 1].x, _drawtile_proc1[d->image_3 - 1].y);
        }
}

static void IndustryDrawToffeeQuarry(const TileInfo *ti)
{
        uint8 x = 0;

        if (IsIndustryCompleted(ti->tile)) {
                x = _industry_anim_offs_toffee[GetAnimationFrame(ti->tile)];
                if (x == 0xFF) {
                        x = 0;
                }
        }

        AddChildSpriteScreen(SPR_IT_TOFFEE_QUARRY_SHOVEL, PAL_NONE, 22 - x, 24 + x);
        AddChildSpriteScreen(SPR_IT_TOFFEE_QUARRY_TOFFEE, PAL_NONE, 6, 14);
}

static void IndustryDrawBubbleGenerator( const TileInfo *ti)
{
        if (IsIndustryCompleted(ti->tile)) {
                AddChildSpriteScreen(SPR_IT_BUBBLE_GENERATOR_BUBBLE, PAL_NONE, 5, _industry_anim_offs_bubbles[GetAnimationFrame(ti->tile)]);
        }
        AddChildSpriteScreen(SPR_IT_BUBBLE_GENERATOR_SPRING, PAL_NONE, 3, 67);
}

static void IndustryDrawToyFactory(const TileInfo *ti)
{
        const DrawIndustryAnimationStruct *d = &_industry_anim_offs_toys[GetAnimationFrame(ti->tile)];

        if (d->image_1 != 0xFF) {
                AddChildSpriteScreen(SPR_IT_TOY_FACTORY_CLAY, PAL_NONE, d->x, 96 + d->image_1);
        }

        if (d->image_2 != 0xFF) {
                AddChildSpriteScreen(SPR_IT_TOY_FACTORY_ROBOT, PAL_NONE, 16 - d->image_2 * 2, 100 + d->image_2);
        }

        AddChildSpriteScreen(SPR_IT_TOY_FACTORY_STAMP, PAL_NONE, 7, d->image_3);
        AddChildSpriteScreen(SPR_IT_TOY_FACTORY_STAMP_HOLDER, PAL_NONE, 0, 42);
}

static void IndustryDrawCoalPlantSparks(const TileInfo *ti)
{
        if (IsIndustryCompleted(ti->tile)) {
                uint8 image = GetAnimationFrame(ti->tile);

                if (image != 0 && image < 7) {
                        AddChildSpriteScreen(image + SPR_IT_POWER_PLANT_TRANSFORMERS,
                                PAL_NONE,
                                _coal_plant_sparks[image - 1].x,
                                _coal_plant_sparks[image - 1].y
                        );
                }
        }
}

typedef void IndustryDrawTileProc(const TileInfo *ti);
static IndustryDrawTileProc * const _industry_draw_tile_procs[5] = {
        IndustryDrawSugarMine,
        IndustryDrawToffeeQuarry,
        IndustryDrawBubbleGenerator,
        IndustryDrawToyFactory,
        IndustryDrawCoalPlantSparks,
};

static void DrawTile_Industry(TileInfo *ti)
{
        IndustryGfx gfx = GetIndustryGfx(ti->tile);
        Industry *ind = Industry::GetByTile(ti->tile);
        const IndustryTileSpec *indts = GetIndustryTileSpec(gfx);

        /* Retrieve pointer to the draw industry tile struct */
        if (gfx >= NEW_INDUSTRYTILEOFFSET) {
                /* Draw the tile using the specialized method of newgrf industrytile.
                 * DrawNewIndustry will return false if ever the resolver could not
                 * find any sprite to display.  So in this case, we will jump on the
                 * substitute gfx instead. */
                if (indts->grf_prop.spritegroup[0] != NULL && DrawNewIndustryTile(ti, ind, gfx, indts)) {
                        return;
                } else {
                        /* No sprite group (or no valid one) found, meaning no graphics associated.
                         * Use the substitute one instead */
                        if (indts->grf_prop.subst_id != INVALID_INDUSTRYTILE) {
                                gfx = indts->grf_prop.subst_id;
                                /* And point the industrytile spec accordingly */
                                indts = GetIndustryTileSpec(gfx);
                        }
                }
        }

        const DrawBuildingsTileStruct *dits = &_industry_draw_tile_data[gfx << 2 | (indts->anim_state ?
                        GetAnimationFrame(ti->tile) & INDUSTRY_COMPLETED :
                        GetIndustryConstructionStage(ti->tile))];

        SpriteID image = dits->ground.sprite;

        /* DrawFoundation() modifies ti->z and ti->tileh */
        if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);

        /* If the ground sprite is the default flat water sprite, draw also canal/river borders.
         * Do not do this if the tile's WaterClass is 'land'. */
        if (image == SPR_FLAT_WATER_TILE && IsTileOnWater(ti->tile)) {
                DrawWaterClassGround(ti);
        } else {
                DrawGroundSprite(image, GroundSpritePaletteTransform(image, dits->ground.pal, GENERAL_SPRITE_COLOUR(ind->random_colour)));
        }

        DrawOverlay(ti, MP_INDUSTRY);

        /* If industries are transparent and invisible, do not draw the upper part */
        if (IsInvisibilitySet(TO_INDUSTRIES)) return;

        /* Add industry on top of the ground? */
        image = dits->building.sprite;
        if (image != 0) {
                AddSortableSpriteToDraw(image, SpriteLayoutPaletteTransform(image, dits->building.pal, GENERAL_SPRITE_COLOUR(ind->random_colour)),
                        ti->x + dits->subtile_x,
                        ti->y + dits->subtile_y,
                        dits->width,
                        dits->height,
                        dits->dz,
                        ti->z,
                        IsTransparencySet(TO_INDUSTRIES));

                if (IsTransparencySet(TO_INDUSTRIES)) return;
        }

        {
                int proc = dits->draw_proc - 1;
                if (proc >= 0) _industry_draw_tile_procs[proc](ti);
        }
}

static int GetSlopePixelZ_Industry(TileIndex tile, uint x, uint y)
{
        return GetTileMaxPixelZ(tile);
}

static Foundation GetFoundation_Industry(TileIndex tile, Slope tileh)
{
        IndustryGfx gfx = GetIndustryGfx(tile);

        /* For NewGRF industry tiles we might not be drawing a foundation. We need to
         * account for this, as other structures should
         * draw the wall of the foundation in this case.
         */
        if (gfx >= NEW_INDUSTRYTILEOFFSET) {
                const IndustryTileSpec *indts = GetIndustryTileSpec(gfx);
                if (indts->grf_prop.spritegroup[0] != NULL && HasBit(indts->callback_mask, CBM_INDT_DRAW_FOUNDATIONS)) {
                        uint32 callback_res = GetIndustryTileCallback(CBID_INDTILE_DRAW_FOUNDATIONS, 0, 0, gfx, Industry::GetByTile(tile), tile);
                        if (callback_res != CALLBACK_FAILED && !ConvertBooleanCallback(indts->grf_prop.grffile, CBID_INDTILE_DRAW_FOUNDATIONS, callback_res)) return FOUNDATION_NONE;
                }
        }
        return FlatteningFoundation(tileh);
}

static void AddAcceptedCargo_Industry(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
{
        IndustryGfx gfx = GetIndustryGfx(tile);
        const IndustryTileSpec *itspec = GetIndustryTileSpec(gfx);

        /* When we have to use a callback, we put our data in the next two variables */
        CargoID raw_accepts_cargo[lengthof(itspec->accepts_cargo)];
        uint8 raw_cargo_acceptance[lengthof(itspec->acceptance)];

        /* And then these will always point to a same sized array with the required data */
        const CargoID *accepts_cargo = itspec->accepts_cargo;
        const uint8 *cargo_acceptance = itspec->acceptance;

        if (HasBit(itspec->callback_mask, CBM_INDT_ACCEPT_CARGO)) {
                uint16 res = GetIndustryTileCallback(CBID_INDTILE_ACCEPT_CARGO, 0, 0, gfx, Industry::GetByTile(tile), tile);
                if (res != CALLBACK_FAILED) {
                        accepts_cargo = raw_accepts_cargo;
                        for (uint i = 0; i < lengthof(itspec->accepts_cargo); i++) raw_accepts_cargo[i] = GetCargoTranslation(GB(res, i * 5, 5), itspec->grf_prop.grffile);
                }
        }

        if (HasBit(itspec->callback_mask, CBM_INDT_CARGO_ACCEPTANCE)) {
                uint16 res = GetIndustryTileCallback(CBID_INDTILE_CARGO_ACCEPTANCE, 0, 0, gfx, Industry::GetByTile(tile), tile);
                if (res != CALLBACK_FAILED) {
                        cargo_acceptance = raw_cargo_acceptance;
                        for (uint i = 0; i < lengthof(itspec->accepts_cargo); i++) raw_cargo_acceptance[i] = GB(res, i * 4, 4);
                }
        }

        const Industry *ind = Industry::GetByTile(tile);
        for (byte i = 0; i < lengthof(itspec->accepts_cargo); i++) {
                CargoID a = accepts_cargo[i];
                if (a == CT_INVALID || cargo_acceptance[i] == 0) continue; // work only with valid cargoes

                /* Add accepted cargo */
                acceptance[a] += cargo_acceptance[i];

                /* Maybe set 'always accepted' bit (if it's not set already) */
                if (HasBit(*always_accepted, a)) continue;

                bool accepts = false;
                for (uint cargo_index = 0; cargo_index < lengthof(ind->accepts_cargo); cargo_index++) {
                        /* Test whether the industry itself accepts the cargo type */
                        if (ind->accepts_cargo[cargo_index] == a) {
                                accepts = true;
                                break;
                        }
                }

                if (accepts) continue;

                /* If the industry itself doesn't accept this cargo, set 'always accepted' bit */
                SetBit(*always_accepted, a);
        }
}

static void GetTileDesc_Industry(TileIndex tile, TileDesc *td)
{
        const Industry *i = Industry::GetByTile(tile);
        const IndustrySpec *is = GetIndustrySpec(i->type);

        td->owner[0] = i->owner;
        td->str = is->name;
        if (!IsIndustryCompleted(tile)) {
                SetDParamX(td->dparam, 0, td->str);
                td->str = STR_LAI_TOWN_INDUSTRY_DESCRIPTION_UNDER_CONSTRUCTION;
        }

        if (is->grf_prop.grffile != NULL) {
                td->grf = GetGRFConfig(is->grf_prop.grffile->grfid)->GetName();
        }
}

static CommandCost ClearTile_Industry(TileIndex tile, DoCommandFlag flags)
{
        Industry *i = Industry::GetByTile(tile);
        const IndustrySpec *indspec = GetIndustrySpec(i->type);

        /* water can destroy industries
         * in editor you can bulldoze industries
         * with magic_bulldozer cheat you can destroy industries
         * (area around OILRIG is water, so water shouldn't flood it
         */
        if ((_current_company != OWNER_WATER && _game_mode != GM_EDITOR &&
                        !_cheats.magic_bulldozer.value) ||
                        ((flags & DC_AUTO) != 0) ||
                        (_current_company == OWNER_WATER &&
                                ((indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) ||
                                HasBit(GetIndustryTileSpec(GetIndustryGfx(tile))->slopes_refused, 5)))) {
                SetDParam(1, indspec->name);
                return_cmd_error(flags & DC_AUTO ? STR_ERROR_GENERIC_OBJECT_IN_THE_WAY : INVALID_STRING_ID);
        }

        if (flags & DC_EXEC) {
                AI::BroadcastNewEvent(new ScriptEventIndustryClose(i->index));
                Game::NewEvent(new ScriptEventIndustryClose(i->index));
                delete i;
        }
        return CommandCost(EXPENSES_CONSTRUCTION, indspec->GetRemovalCost());
}

/**
 * Move produced cargo from industry to nearby stations.
 * @param tile Industry tile
 * @return true if any cargo was moved.
 */
static bool TransportIndustryGoods(TileIndex tile)
{
        Industry *i = Industry::GetByTile(tile);
        const IndustrySpec *indspec = GetIndustrySpec(i->type);
        bool moved_cargo = false;

        StationFinder stations(i->location);

        for (uint j = 0; j < lengthof(i->produced_cargo_waiting); j++) {
                uint cw = min(i->produced_cargo_waiting[j], 255);
                if (cw > indspec->minimal_cargo && i->produced_cargo[j] != CT_INVALID) {
                        i->produced_cargo_waiting[j] -= cw;

                        /* fluctuating economy? */
                        if (EconomyIsInRecession()) cw = (cw + 1) / 2;

                        i->this_month_production[j] += cw;

                        uint am = MoveGoodsToStation(i->produced_cargo[j], cw, ST_INDUSTRY, i->index, stations.GetStations());
                        i->this_month_transported[j] += am;

                        moved_cargo |= (am != 0);
                }
        }

        return moved_cargo;
}


static void AnimateTile_Industry(TileIndex tile)
{
        IndustryGfx gfx = GetIndustryGfx(tile);

        if (GetIndustryTileSpec(gfx)->animation.status != ANIM_STATUS_NO_ANIMATION) {
                AnimateNewIndustryTile(tile);
                return;
        }

        switch (gfx) {
        case GFX_SUGAR_MINE_SIEVE:
                if ((_tick_counter & 1) == 0) {
                        byte m = GetAnimationFrame(tile) + 1;

                        if (_settings_client.sound.ambient) {
                                switch (m & 7) {
                                        case 2: SndPlayTileFx(SND_2D_RIP_2, tile); break;
                                        case 6: SndPlayTileFx(SND_29_RIP, tile); break;
                                }
                        }

                        if (m >= 96) {
                                m = 0;
                                DeleteAnimatedTile(tile);
                        }
                        SetAnimationFrame(tile, m);

                        MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                }
                break;

        case GFX_TOFFEE_QUARY:
                if ((_tick_counter & 3) == 0) {
                        byte m = GetAnimationFrame(tile);

                        if (_industry_anim_offs_toffee[m] == 0xFF && _settings_client.sound.ambient) {
                                SndPlayTileFx(SND_30_CARTOON_SOUND, tile);
                        }

                        if (++m >= 70) {
                                m = 0;
                                DeleteAnimatedTile(tile);
                        }
                        SetAnimationFrame(tile, m);

                        MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                }
                break;

        case GFX_BUBBLE_CATCHER:
                if ((_tick_counter & 1) == 0) {
                        byte m = GetAnimationFrame(tile);

                        if (++m >= 40) {
                                m = 0;
                                DeleteAnimatedTile(tile);
                        }
                        SetAnimationFrame(tile, m);

                        MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                }
                break;

        /* Sparks on a coal plant */
        case GFX_POWERPLANT_SPARKS:
                if ((_tick_counter & 3) == 0) {
                        byte m = GetAnimationFrame(tile);
                        if (m == 6) {
                                SetAnimationFrame(tile, 0);
                                DeleteAnimatedTile(tile);
                        } else {
                                SetAnimationFrame(tile, m + 1);
                                MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                        }
                }
                break;

        case GFX_TOY_FACTORY:
                if ((_tick_counter & 1) == 0) {
                        byte m = GetAnimationFrame(tile) + 1;

                        switch (m) {
                                case  1: if (_settings_client.sound.ambient) SndPlayTileFx(SND_2C_MACHINERY, tile); break;
                                case 23: if (_settings_client.sound.ambient) SndPlayTileFx(SND_2B_COMEDY_HIT, tile); break;
                                case 28: if (_settings_client.sound.ambient) SndPlayTileFx(SND_2A_EXTRACT_AND_POP, tile); break;
                                default:
                                        if (m >= 50) {
                                                int n = GetIndustryAnimationLoop(tile) + 1;
                                                m = 0;
                                                if (n >= 8) {
                                                        n = 0;
                                                        DeleteAnimatedTile(tile);
                                                }
                                                SetIndustryAnimationLoop(tile, n);
                                        }
                        }

                        SetAnimationFrame(tile, m);
                        MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                }
                break;

        case GFX_PLASTIC_FOUNTAIN_ANIMATED_1: case GFX_PLASTIC_FOUNTAIN_ANIMATED_2:
        case GFX_PLASTIC_FOUNTAIN_ANIMATED_3: case GFX_PLASTIC_FOUNTAIN_ANIMATED_4:
        case GFX_PLASTIC_FOUNTAIN_ANIMATED_5: case GFX_PLASTIC_FOUNTAIN_ANIMATED_6:
        case GFX_PLASTIC_FOUNTAIN_ANIMATED_7: case GFX_PLASTIC_FOUNTAIN_ANIMATED_8:
                if ((_tick_counter & 3) == 0) {
                        IndustryGfx gfx = GetIndustryGfx(tile);

                        gfx = (gfx < 155) ? gfx + 1 : 148;
                        SetIndustryGfx(tile, gfx);
                        MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                }
                break;

        case GFX_OILWELL_ANIMATED_1:
        case GFX_OILWELL_ANIMATED_2:
        case GFX_OILWELL_ANIMATED_3:
                if ((_tick_counter & 7) == 0) {
                        bool b = Chance16(1, 7);
                        IndustryGfx gfx = GetIndustryGfx(tile);

                        byte m = GetAnimationFrame(tile) + 1;
                        if (m == 4 && (m = 0, ++gfx) == GFX_OILWELL_ANIMATED_3 + 1 && (gfx = GFX_OILWELL_ANIMATED_1, b)) {
                                SetIndustryGfx(tile, GFX_OILWELL_NOT_ANIMATED);
                                SetIndustryConstructionStage(tile, 3);
                                DeleteAnimatedTile(tile);
                        } else {
                                SetAnimationFrame(tile, m);
                                SetIndustryGfx(tile, gfx);
                                MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                        }
                }
                break;

        case GFX_COAL_MINE_TOWER_ANIMATED:
        case GFX_COPPER_MINE_TOWER_ANIMATED:
        case GFX_GOLD_MINE_TOWER_ANIMATED: {
                        int state = _tick_counter & 0x7FF;

                        if ((state -= 0x400) < 0) return;

                        if (state < 0x1A0) {
                                if (state < 0x20 || state >= 0x180) {
                                        byte m = GetAnimationFrame(tile);
                                        if (!(m & 0x40)) {
                                                SetAnimationFrame(tile, m | 0x40);
                                                if (_settings_client.sound.ambient) SndPlayTileFx(SND_0B_MINING_MACHINERY, tile);
                                        }
                                        if (state & 7) return;
                                } else {
                                        if (state & 3) return;
                                }
                                byte m = (GetAnimationFrame(tile) + 1) | 0x40;
                                if (m > 0xC2) m = 0xC0;
                                SetAnimationFrame(tile, m);
                                MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                        } else if (state >= 0x200 && state < 0x3A0) {
                                int i = (state < 0x220 || state >= 0x380) ? 7 : 3;
                                if (state & i) return;

                                byte m = (GetAnimationFrame(tile) & 0xBF) - 1;
                                if (m < 0x80) m = 0x82;
                                SetAnimationFrame(tile, m);
                                MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                        }
                        break;
                }
        }
}

static void CreateChimneySmoke(TileIndex tile)
{
        uint x = TileX(tile) * TILE_SIZE;
        uint y = TileY(tile) * TILE_SIZE;
        int z = GetTileMaxPixelZ(tile);

        CreateEffectVehicle(x + 15, y + 14, z + 59, EV_CHIMNEY_SMOKE);
}

static void MakeIndustryTileBigger(TileIndex tile)
{
        byte cnt = GetIndustryConstructionCounter(tile) + 1;
        if (cnt != 4) {
                SetIndustryConstructionCounter(tile, cnt);
                return;
        }

        byte stage = GetIndustryConstructionStage(tile) + 1;
        SetIndustryConstructionCounter(tile, 0);
        SetIndustryConstructionStage(tile, stage);
        StartStopIndustryTileAnimation(tile, IAT_CONSTRUCTION_STATE_CHANGE);
        if (stage == INDUSTRY_COMPLETED) SetIndustryCompleted(tile);

        MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);

        if (!IsIndustryCompleted(tile)) return;

        IndustryGfx gfx = GetIndustryGfx(tile);
        if (gfx >= NEW_INDUSTRYTILEOFFSET) {
                /* New industries are already animated on construction. */
                return;
        }

        switch (gfx) {
        case GFX_POWERPLANT_CHIMNEY:
                CreateChimneySmoke(tile);
                break;

        case GFX_OILRIG_1: {
                /* Do not require an industry tile to be after the first two GFX_OILRIG_1
                 * tiles (like the default oil rig). Do a proper check to ensure the
                 * tiles belong to the same industry and based on that build the oil rig's
                 * station. */
                TileIndex other = tile + TileDiffXY(0, 1);

                if (IsTileType(other, MP_INDUSTRY) &&
                                GetIndustryGfx(other) == GFX_OILRIG_1 &&
                                GetIndustryIndex(tile) == GetIndustryIndex(other)) {
                        BuildOilRig(tile);
                }
                break;
        }

        case GFX_TOY_FACTORY:
        case GFX_BUBBLE_CATCHER:
        case GFX_TOFFEE_QUARY:
                SetAnimationFrame(tile, 0);
                SetIndustryAnimationLoop(tile, 0);
                break;

        case GFX_PLASTIC_FOUNTAIN_ANIMATED_1: case GFX_PLASTIC_FOUNTAIN_ANIMATED_2:
        case GFX_PLASTIC_FOUNTAIN_ANIMATED_3: case GFX_PLASTIC_FOUNTAIN_ANIMATED_4:
        case GFX_PLASTIC_FOUNTAIN_ANIMATED_5: case GFX_PLASTIC_FOUNTAIN_ANIMATED_6:
        case GFX_PLASTIC_FOUNTAIN_ANIMATED_7: case GFX_PLASTIC_FOUNTAIN_ANIMATED_8:
                AddAnimatedTile(tile);
                break;
        }
}

static void TileLoopIndustry_BubbleGenerator(TileIndex tile)
{
        static const int8 _bubble_spawn_location[3][4] = {
                { 11,   0, -4, -14 },
                { -4, -10, -4,   1 },
                { 49,  59, 60,  65 },
        };

        if (_settings_client.sound.ambient) SndPlayTileFx(SND_2E_EXTRACT_AND_POP, tile);

        int dir = Random() & 3;

        EffectVehicle *v = CreateEffectVehicleAbove(
                TileX(tile) * TILE_SIZE + _bubble_spawn_location[0][dir],
                TileY(tile) * TILE_SIZE + _bubble_spawn_location[1][dir],
                _bubble_spawn_location[2][dir],
                EV_BUBBLE
        );

        if (v != NULL) v->animation_substate = dir;
}

static void TileLoop_Industry(TileIndex tile)
{
        if (IsTileOnWater(tile)) TileLoop_Water(tile);

        /* Normally this doesn't happen, but if an industry NewGRF is removed
         * an industry that was previously build on water can now be flooded.
         * If this happens the tile is no longer an industry tile after
         * returning from TileLoop_Water. */
        if (!IsTileType(tile, MP_INDUSTRY)) return;

        TriggerIndustryTile(tile, INDTILE_TRIGGER_TILE_LOOP);

        if (!IsIndustryCompleted(tile)) {
                MakeIndustryTileBigger(tile);
                return;
        }

        if (_game_mode == GM_EDITOR) return;

        if (TransportIndustryGoods(tile) && !StartStopIndustryTileAnimation(Industry::GetByTile(tile), IAT_INDUSTRY_DISTRIBUTES_CARGO)) {
                uint newgfx = GetIndustryTileSpec(GetIndustryGfx(tile))->anim_production;

                if (newgfx != INDUSTRYTILE_NOANIM) {
                        ResetIndustryConstructionStage(tile);
                        SetIndustryCompleted(tile);
                        SetIndustryGfx(tile, newgfx);
                        MarkTileDirtyByTile(tile);
                        return;
                }
        }

        if (StartStopIndustryTileAnimation(tile, IAT_TILELOOP)) return;

        IndustryGfx newgfx = GetIndustryTileSpec(GetIndustryGfx(tile))->anim_next;
        if (newgfx != INDUSTRYTILE_NOANIM) {
                ResetIndustryConstructionStage(tile);
                SetIndustryGfx(tile, newgfx);
                MarkTileDirtyByTile(tile, ZOOM_LVL_DRAW_MAP);
                return;
        }

        IndustryGfx gfx = GetIndustryGfx(tile);
        switch (gfx) {
        case GFX_COAL_MINE_TOWER_NOT_ANIMATED:
        case GFX_COPPER_MINE_TOWER_NOT_ANIMATED:
        case GFX_GOLD_MINE_TOWER_NOT_ANIMATED:
                if (!(_tick_counter & 0x400) && Chance16(1, 2)) {
                        switch (gfx) {
                                case GFX_COAL_MINE_TOWER_NOT_ANIMATED:   gfx = GFX_COAL_MINE_TOWER_ANIMATED;   break;
                                case GFX_COPPER_MINE_TOWER_NOT_ANIMATED: gfx = GFX_COPPER_MINE_TOWER_ANIMATED; break;
                                case GFX_GOLD_MINE_TOWER_NOT_ANIMATED:   gfx = GFX_GOLD_MINE_TOWER_ANIMATED;   break;
                        }
                        SetIndustryGfx(tile, gfx);
                        SetAnimationFrame(tile, 0x80);
                        AddAnimatedTile(tile);
                }
                break;

        case GFX_OILWELL_NOT_ANIMATED:
                if (Chance16(1, 6)) {
                        SetIndustryGfx(tile, GFX_OILWELL_ANIMATED_1);
                        SetAnimationFrame(tile, 0);
                        AddAnimatedTile(tile);
                }
                break;

        case GFX_COAL_MINE_TOWER_ANIMATED:
        case GFX_COPPER_MINE_TOWER_ANIMATED:
        case GFX_GOLD_MINE_TOWER_ANIMATED:
                if (!(_tick_counter & 0x400)) {
                        switch (gfx) {
                                case GFX_COAL_MINE_TOWER_ANIMATED:   gfx = GFX_COAL_MINE_TOWER_NOT_ANIMATED;   break;
                                case GFX_COPPER_MINE_TOWER_ANIMATED: gfx = GFX_COPPER_MINE_TOWER_NOT_ANIMATED; break;
                                case GFX_GOLD_MINE_TOWER_ANIMATED:   gfx = GFX_GOLD_MINE_TOWER_NOT_ANIMATED;   break;
                        }
                        SetIndustryGfx(tile, gfx);
                        SetIndustryCompleted(tile);
                        SetIndustryConstructionStage(tile, 3);
                        DeleteAnimatedTile(tile);
                }
                break;

        case GFX_POWERPLANT_SPARKS:
                if (Chance16(1, 3)) {
                        if (_settings_client.sound.ambient) SndPlayTileFx(SND_0C_ELECTRIC_SPARK, tile);
                        AddAnimatedTile(tile);
                }
                break;

        case GFX_COPPER_MINE_CHIMNEY:
                CreateEffectVehicleAbove(TileX(tile) * TILE_SIZE + 6, TileY(tile) * TILE_SIZE + 6, 43, EV_COPPER_MINE_SMOKE);
                break;


        case GFX_TOY_FACTORY: {
                        Industry *i = Industry::GetByTile(tile);
                        if (i->was_cargo_delivered) {
                                i->was_cargo_delivered = false;
                                SetIndustryAnimationLoop(tile, 0);
                                AddAnimatedTile(tile);
                        }
                }
                break;

        case GFX_BUBBLE_GENERATOR:
                TileLoopIndustry_BubbleGenerator(tile);
                break;

        case GFX_TOFFEE_QUARY:
                AddAnimatedTile(tile);
                break;

        case GFX_SUGAR_MINE_SIEVE:
                if (Chance16(1, 3)) AddAnimatedTile(tile);
                break;
        }
}

static bool ClickTile_Industry(TileIndex tile)
{
        ShowIndustryViewWindow(GetIndustryIndex(tile));
        return true;
}

static TrackStatus GetTileTrackStatus_Industry(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
{
        return 0;
}

static void ChangeTileOwner_Industry(TileIndex tile, Owner old_owner, Owner new_owner)
{
        /* If the founder merges, the industry was created by the merged company */
        Industry *i = Industry::GetByTile(tile);
        if (i->founder == old_owner) i->founder = (new_owner == INVALID_OWNER) ? OWNER_NONE : new_owner;
}

/**
 * Check whether the tile is a forest.
 * @param tile the tile to investigate.
 * @return true if and only if the tile is a forest
 */
bool IsTileForestIndustry(TileIndex tile)
{
        /* Check for industry tile */
        if (!IsTileType(tile, MP_INDUSTRY)) return false;

        const Industry *ind = Industry::GetByTile(tile);

        /* Check for organic industry (i.e. not processing or extractive) */
        if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;

        /* Check for wood production */
        for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
                /* The industry produces wood. */
                if (ind->produced_cargo[i] != CT_INVALID && CargoSpec::Get(ind->produced_cargo[i])->label == 'WOOD') return true;
        }

        return false;
}

static const byte _plantfarmfield_type[] = {1, 1, 1, 1, 1, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6};

/**
 * Check whether the tile can be replaced by a farm field.
 * @param tile the tile to investigate.
 * @param allow_fields if true, the method will return true even if
 * the tile is a farm tile, otherwise the tile may not be a farm tile
 * @return true if the tile can become a farm field
 */
static bool IsSuitableForFarmField(TileIndex tile, bool allow_fields)
{
        switch (GetTileType(tile)) {
                case MP_CLEAR: return !IsClearGround(tile, CLEAR_SNOW) && !IsClearGround(tile, CLEAR_DESERT) && (allow_fields || !IsClearGround(tile, CLEAR_FIELDS));
                case MP_TREES: return GetTreeGround(tile) != TREE_GROUND_SHORE;
                default:       return false;
        }
}

/**
 * Build farm field fence
 * @param tile the tile to position the fence on
 * @param size the size of the field being planted in tiles
 * @param type type of fence to set
 * @param side the side of the tile to attempt placement
 */
static void SetupFarmFieldFence(TileIndex tile, int size, byte type, DiagDirection side)
{
        TileIndexDiff diff = (DiagDirToAxis(side) == AXIS_Y ? TileDiffXY(1, 0) : TileDiffXY(0, 1));

        do {
                tile = TILE_MASK(tile);

                if (IsTileType(tile, MP_CLEAR) && IsClearGround(tile, CLEAR_FIELDS)) {
                        byte or_ = type;

                        if (or_ == 1 && Chance16(1, 7)) or_ = 2;

                        SetFence(tile, side, or_);
                }

                tile += diff;
        } while (--size);
}

static void PlantFarmField(TileIndex tile, IndustryID industry)
{
        if (_settings_game.game_creation.landscape == LT_ARCTIC) {
                if (GetTileZ(tile) + 2 >= GetSnowLine()) return;
        }

        /* determine field size */
        uint32 r = (Random() & 0x303) + 0x404;
        if (_settings_game.game_creation.landscape == LT_ARCTIC) r += 0x404;
        uint size_x = GB(r, 0, 8);
        uint size_y = GB(r, 8, 8);

        TileArea ta(tile - TileDiffXY(min(TileX(tile), size_x / 2), min(TileY(tile), size_y / 2)), size_x, size_y);
        ta.ClampToMap();

        if (ta.w == 0 || ta.h == 0) return;

        /* check the amount of bad tiles */
        int count = 0;
        TILE_AREA_LOOP(cur_tile, ta) {
                assert(cur_tile < MapSize());
                count += IsSuitableForFarmField(cur_tile, false);
        }
        if (count * 2 < ta.w * ta.h) return;

        /* determine type of field */
        r = Random();
        uint counter = GB(r, 5, 3);
        uint field_type = GB(r, 8, 8) * 9 >> 8;

        /* make field */
        TILE_AREA_LOOP(cur_tile, ta) {
                assert(cur_tile < MapSize());
                if (IsSuitableForFarmField(cur_tile, true)) {
                        MakeField(cur_tile, field_type, industry);
                        SetClearCounter(cur_tile, counter);
                        MarkTileDirtyByTile(cur_tile, ZOOM_LVL_DRAW_MAP);
                }
        }

        int type = 3;
        if (_settings_game.game_creation.landscape != LT_ARCTIC && _settings_game.game_creation.landscape != LT_TROPIC) {
                type = _plantfarmfield_type[Random() & 0xF];
        }

        SetupFarmFieldFence(ta.tile, ta.h, type, DIAGDIR_NE);
        SetupFarmFieldFence(ta.tile, ta.w, type, DIAGDIR_NW);
        SetupFarmFieldFence(ta.tile + TileDiffXY(ta.w - 1, 0), ta.h, type, DIAGDIR_SW);
        SetupFarmFieldFence(ta.tile + TileDiffXY(0, ta.h - 1), ta.w, type, DIAGDIR_SE);
}

void PlantRandomFarmField(const Industry *i)
{
        int x = i->location.w / 2 + Random() % 31 - 16;
        int y = i->location.h / 2 + Random() % 31 - 16;

        TileIndex tile = TileAddWrap(i->location.tile, x, y);

        if (tile != INVALID_TILE) PlantFarmField(tile, i->index);
}

/**
 * Search callback function for ChopLumberMillTrees
 * @param tile to test
 * @param user_data that is passed by the caller.  In this case, nothing
 * @return the result of the test
 */
static bool SearchLumberMillTrees(TileIndex tile, void *user_data)
{
        if (IsTileType(tile, MP_TREES) && GetTreeGrowth(tile) > 2) { ///< 3 and up means all fully grown trees
                /* found a tree */

                Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);

                _industry_sound_ctr = 1;
                _industry_sound_tile = tile;
                if (_settings_client.sound.ambient) SndPlayTileFx(SND_38_CHAINSAW, tile);

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

                cur_company.Restore();
                return true;
        }
        return false;
}

/**
 * Perform a circular search around the Lumber Mill in order to find trees to cut
 * @param i industry
 */
static void ChopLumberMillTrees(Industry *i)
{
        /* We only want to cut trees if all tiles are completed. */
        TILE_AREA_LOOP(tile_cur, i->location) {
                if (i->TileBelongsToIndustry(tile_cur)) {
                        if (!IsIndustryCompleted(tile_cur)) return;
                }
        }

        TileIndex tile = i->location.tile;
        if (CircularTileSearch(&tile, 40, SearchLumberMillTrees, NULL)) { // 40x40 tiles  to search.
                i->produced_cargo_waiting[0] = min(0xffff, i->produced_cargo_waiting[0] + 45); // Found a tree, add according value to waiting cargo.
        }
}

static void ProduceIndustryGoods(Industry *i)
{
        const IndustrySpec *indsp = GetIndustrySpec(i->type);

        /* play a sound? */
        if ((i->counter & 0x3F) == 0) {
                uint32 r;
                uint num;
                if (Chance16R(1, 14, r) && (num = indsp->number_of_sounds) != 0 && _settings_client.sound.ambient) {
                        SndPlayTileFx(
                                (SoundFx)(indsp->random_sounds[((r >> 16) * num) >> 16]),
                                i->location.tile);
                }
        }

        i->counter--;

        /* produce some cargo */
        if ((i->counter % INDUSTRY_PRODUCE_TICKS) == 0) {
                if (HasBit(indsp->callback_mask, CBM_IND_PRODUCTION_256_TICKS)) IndustryProductionCallback(i, 1);

                IndustryBehaviour indbehav = indsp->behaviour;
                i->produced_cargo_waiting[0] = min(0xffff, i->produced_cargo_waiting[0] + i->production_rate[0]);
                i->produced_cargo_waiting[1] = min(0xffff, i->produced_cargo_waiting[1] + i->production_rate[1]);

                if ((indbehav & INDUSTRYBEH_PLANT_FIELDS) != 0) {
                        uint16 cb_res = CALLBACK_FAILED;
                        if (HasBit(indsp->callback_mask, CBM_IND_SPECIAL_EFFECT)) {
                                cb_res = GetIndustryCallback(CBID_INDUSTRY_SPECIAL_EFFECT, Random(), 0, i, i->type, i->location.tile);
                        }

                        bool plant;
                        if (cb_res != CALLBACK_FAILED) {
                                plant = ConvertBooleanCallback(indsp->grf_prop.grffile, CBID_INDUSTRY_SPECIAL_EFFECT, cb_res);
                        } else {
                                plant = Chance16(1, 8);
                        }

                        if (plant) PlantRandomFarmField(i);
                }
                if ((indbehav & INDUSTRYBEH_CUT_TREES) != 0) {
                        uint16 cb_res = CALLBACK_FAILED;
                        if (HasBit(indsp->callback_mask, CBM_IND_SPECIAL_EFFECT)) {
                                cb_res = GetIndustryCallback(CBID_INDUSTRY_SPECIAL_EFFECT, Random(), 1, i, i->type, i->location.tile);
                        }

                        bool cut;
                        if (cb_res != CALLBACK_FAILED) {
                                cut = ConvertBooleanCallback(indsp->grf_prop.grffile, CBID_INDUSTRY_SPECIAL_EFFECT, cb_res);
                        } else {
                                cut = ((i->counter % INDUSTRY_CUT_TREE_TICKS) == 0);
                        }

                        if (cut) ChopLumberMillTrees(i);
                }

                TriggerIndustry(i, INDUSTRY_TRIGGER_INDUSTRY_TICK);
                StartStopIndustryTileAnimation(i, IAT_INDUSTRY_TICK);
        }
}

void OnTick_Industry()
{
        if (_industry_sound_ctr != 0) {
                _industry_sound_ctr++;

                if (_industry_sound_ctr == 75) {
                        if (_settings_client.sound.ambient) SndPlayTileFx(SND_37_BALLOON_SQUEAK, _industry_sound_tile);
                } else if (_industry_sound_ctr == 160) {
                        _industry_sound_ctr = 0;
                        if (_settings_client.sound.ambient) SndPlayTileFx(SND_36_CARTOON_CRASH, _industry_sound_tile);
                }
        }

        if (_game_mode == GM_EDITOR) return;

        Industry *i;
        FOR_ALL_INDUSTRIES(i) {
                ProduceIndustryGoods(i);
        }
}

/**
 * Check the conditions of #CHECK_NOTHING (Always succeeds).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_NULL(TileIndex tile)
{
        return CommandCost();
}

/**
 * Check the conditions of #CHECK_FOREST (Industry should be build above snow-line in arctic climate).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_Forest(TileIndex tile)
{
        if (_settings_game.game_creation.landscape == LT_ARCTIC) {
                if (GetTileZ(tile) < HighestSnowLine() + 2) {
                        return_cmd_error(STR_ERROR_FOREST_CAN_ONLY_BE_PLANTED);
                }
        }
        return CommandCost();
}

/**
 * Check the conditions of #CHECK_REFINERY (Industry should be positioned near edge of the map).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_OilRefinery(TileIndex tile)
{
        if (_game_mode == GM_EDITOR) return CommandCost();
        if (DistanceFromEdge(TILE_ADDXY(tile, 1, 1)) < _settings_game.game_creation.oil_refinery_limit) return CommandCost();

        return_cmd_error(STR_ERROR_CAN_ONLY_BE_POSITIONED);
}

extern bool _ignore_restrictions;

/**
 * Check the conditions of #CHECK_OIL_RIG (Industries at sea should be positioned near edge of the map).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_OilRig(TileIndex tile)
{
        if (_game_mode == GM_EDITOR && _ignore_restrictions) return CommandCost();
        if (TileHeight(tile) == 0 &&
                        DistanceFromEdge(TILE_ADDXY(tile, 1, 1)) < _settings_game.game_creation.oil_refinery_limit) return CommandCost();

        return_cmd_error(STR_ERROR_CAN_ONLY_BE_POSITIONED);
}

/**
 * Check the conditions of #CHECK_FARM (Industry should be below snow-line in arctic).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_Farm(TileIndex tile)
{
        if (_settings_game.game_creation.landscape == LT_ARCTIC) {
                if (GetTileZ(tile) + 2 >= HighestSnowLine()) {
                        return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
                }
        }
        return CommandCost();
}

/**
 * Check the conditions of #CHECK_PLANTATION (Industry should NOT be in the desert).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_Plantation(TileIndex tile)
{
        if (GetTropicZone(tile) == TROPICZONE_DESERT) {
                return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
        }
        return CommandCost();
}

/**
 * Check the conditions of #CHECK_WATER (Industry should be in the desert).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_Water(TileIndex tile)
{
        if (GetTropicZone(tile) != TROPICZONE_DESERT) {
                return_cmd_error(STR_ERROR_CAN_ONLY_BE_BUILT_IN_DESERT);
        }
        return CommandCost();
}

/**
 * Check the conditions of #CHECK_LUMBERMILL (Industry should be in the rain forest).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_Lumbermill(TileIndex tile)
{
        if (GetTropicZone(tile) != TROPICZONE_RAINFOREST) {
                return_cmd_error(STR_ERROR_CAN_ONLY_BE_BUILT_IN_RAINFOREST);
        }
        return CommandCost();
}

/**
 * Check the conditions of #CHECK_BUBBLEGEN (Industry should be in low land).
 * @param tile %Tile to perform the checking.
 * @return Succeeded or failed command.
 */
static CommandCost CheckNewIndustry_BubbleGen(TileIndex tile)
{
        if (GetTileZ(tile) > 4) {
                return_cmd_error(STR_ERROR_CAN_ONLY_BE_BUILT_IN_LOW_AREAS);
        }
        return CommandCost();
}

/**
 * Industrytype check function signature.
 * @param tile %Tile to check.
 * @return Succeeded or failed command.
 */
typedef CommandCost CheckNewIndustryProc(TileIndex tile);

/** Check functions for different types of industry. */
static CheckNewIndustryProc * const _check_new_industry_procs[CHECK_END] = {
        CheckNewIndustry_NULL,        ///< CHECK_NOTHING
        CheckNewIndustry_Forest,      ///< CHECK_FOREST
        CheckNewIndustry_OilRefinery, ///< CHECK_REFINERY
        CheckNewIndustry_Farm,        ///< CHECK_FARM
        CheckNewIndustry_Plantation,  ///< CHECK_PLANTATION
        CheckNewIndustry_Water,       ///< CHECK_WATER
        CheckNewIndustry_Lumbermill,  ///< CHECK_LUMBERMILL
        CheckNewIndustry_BubbleGen,   ///< CHECK_BUBBLEGEN
        CheckNewIndustry_OilRig,      ///< CHECK_OIL_RIG
};

/**
 * Find a town for the industry, while checking for multiple industries in the same town.
 * @param tile Position of the industry to build.
 * @param type Industry type.
 * @param [out] town Pointer to return town for the new industry, \c NULL is written if no good town can be found.
 * @return Succeeded or failed command.
 *
 * @pre \c *t != NULL
 * @post \c *t points to a town on success, and \c NULL on failure.
 */
static CommandCost FindTownForIndustry(TileIndex tile, int type, Town **t)
{
        *t = ClosestTownFromTile(tile, UINT_MAX);

        if (_settings_game.economy.multiple_industry_per_town) return CommandCost();

        const Industry *i;
        FOR_ALL_INDUSTRIES(i) {
                if (i->type == (byte)type && i->town == *t) {
                        *t = NULL;
                        return_cmd_error(STR_ERROR_ONLY_ONE_ALLOWED_PER_TOWN);
                }
        }

        return CommandCost();
}

bool IsSlopeRefused(Slope current, Slope refused)
{
        if (IsSteepSlope(current)) return true;
        if (current != SLOPE_FLAT) {
                if (IsSteepSlope(refused)) return true;

                Slope t = ComplementSlope(current);

                if ((refused & SLOPE_W) && (t & SLOPE_NW)) return true;
                if ((refused & SLOPE_S) && (t & SLOPE_NE)) return true;
                if ((refused & SLOPE_E) && (t & SLOPE_SW)) return true;
                if ((refused & SLOPE_N) && (t & SLOPE_SE)) return true;
        }

        return false;
}

/**
 * Are the tiles of the industry free?
 * @param tile                     Position to check.
 * @param it                       Industry tiles table.
 * @param itspec_index             The index of the itsepc to build/fund
 * @param type                     Type of the industry.
 * @param initial_random_bits      The random bits the industry is going to have after construction.
 * @param founder                  Industry founder
 * @param creation_type            The circumstances the industry is created under.
 * @param [out] custom_shape_check Perform custom check for the site.
 * @return Failed or succeeded command.
 */
static CommandCost CheckIfIndustryTilesAreFree(TileIndex tile, const IndustryTileTable *it, uint itspec_index, int type, uint16 initial_random_bits, Owner founder, IndustryAvailabilityCallType creation_type, bool *custom_shape_check = NULL)
{
        bool refused_slope = false;
        bool custom_shape = false;

        do {
                IndustryGfx gfx = GetTranslatedIndustryTileID(it->gfx);
                TileIndex cur_tile = TileAddWrap(tile, it->ti.x, it->ti.y);

                if (!IsValidTile(cur_tile)) {
                        return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
                }

                if (gfx == GFX_WATERTILE_SPECIALCHECK) {
                        if (!IsWaterTile(cur_tile) ||
                                        !IsTileFlat(cur_tile)) {
                                return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
                        }
                } else {
                        CommandCost ret = EnsureNoVehicleOnGround(cur_tile);
                        if (ret.Failed()) return ret;
                        if (IsBridgeAbove(cur_tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);

                        const IndustryTileSpec *its = GetIndustryTileSpec(gfx);

                        IndustryBehaviour ind_behav = GetIndustrySpec(type)->behaviour;

                        /* Perform land/water check if not disabled */
                        if (!HasBit(its->slopes_refused, 5) && ((HasTileWaterClass(cur_tile) && IsTileOnWater(cur_tile)) == !(ind_behav & INDUSTRYBEH_BUILT_ONWATER))) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);

                        if (HasBit(its->callback_mask, CBM_INDT_SHAPE_CHECK)) {
                                custom_shape = true;
                                CommandCost ret = PerformIndustryTileSlopeCheck(tile, cur_tile, its, type, gfx, itspec_index, initial_random_bits, founder, creation_type);
                                if (ret.Failed()) return ret;
                        } else {
                                Slope tileh = GetTileSlope(cur_tile);
                                refused_slope |= IsSlopeRefused(tileh, its->slopes_refused);
                        }

                        if ((ind_behav & (INDUSTRYBEH_ONLY_INTOWN | INDUSTRYBEH_TOWN1200_MORE)) || // Tile must be a house
                                        ((ind_behav & INDUSTRYBEH_ONLY_NEARTOWN) && IsTileType(cur_tile, MP_HOUSE))) { // Tile is allowed to be a house (and it is a house)
                                if (!IsTileType(cur_tile, MP_HOUSE)) {
                                        return_cmd_error(STR_ERROR_CAN_ONLY_BE_BUILT_IN_TOWNS);
                                }

                                /* Clear the tiles as OWNER_TOWN to not affect town rating, and to not clear protected buildings */
                                Backup<CompanyByte> cur_company(_current_company, OWNER_TOWN, FILE_LINE);
                                CommandCost ret = DoCommand(cur_tile, 0, 0, DC_NONE, CMD_LANDSCAPE_CLEAR);
                                cur_company.Restore();

                                if (ret.Failed()) return ret;
                        } else {
                                /* Clear the tiles, but do not affect town ratings */
                                CommandCost ret = DoCommand(cur_tile, 0, 0, DC_AUTO | DC_NO_TEST_TOWN_RATING | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);

                                if (ret.Failed()) return ret;
                        }
                }
        } while ((++it)->ti.x != -0x80);

        if (custom_shape_check != NULL) *custom_shape_check = custom_shape;

        /* It is almost impossible to have a fully flat land in TG, so what we
         *  do is that we check if we can make the land flat later on. See
         *  CheckIfCanLevelIndustryPlatform(). */
        if (!refused_slope || (_settings_game.game_creation.land_generator == LG_TERRAGENESIS && _generating_world && !custom_shape && !_ignore_restrictions)) {
                return CommandCost();
        }
        return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
}

/**
 * Is the industry allowed to be built at this place for the town?
 * @param tile Tile to construct the industry.
 * @param type Type of the industry.
 * @param t    Town authority that the industry belongs to.
 * @return Succeeded or failed command.
 */
static CommandCost CheckIfIndustryIsAllowed(TileIndex tile, int type, const Town *t)
{
        if ((GetIndustrySpec(type)->behaviour & INDUSTRYBEH_TOWN1200_MORE) && t->cache.population < 1200) {
                return_cmd_error(STR_ERROR_CAN_ONLY_BE_BUILT_IN_TOWNS_WITH_POPULATION_OF_1200);
        }

        if ((GetIndustrySpec(type)->behaviour & INDUSTRYBEH_ONLY_NEARTOWN) && DistanceMax(t->xy, tile) > 9) {
                return_cmd_error(STR_ERROR_CAN_ONLY_BE_BUILT_NEAR_TOWN_CENTER);
        }       
 
        if (type == IT_OIL_RIG &&
                        (IsTunnelInWay(tile, 0) ||
                        IsTunnelInWay(tile + TileDiffXY(0, 1), 0) ||
                        IsTunnelInWay(tile + TileDiffXY(1, 2), 0))) return_cmd_error(STR_ERROR_NO_DRILLING_ABOVE_CHUNNEL);

        return CommandCost();
}

static bool CheckCanTerraformSurroundingTiles(TileIndex tile, uint height, int internal)
{
        /* Check if we don't leave the map */
        if (TileX(tile) == 0 || TileY(tile) == 0 || GetTileType(tile) == MP_VOID) return false;

        TileArea ta(tile - TileDiffXY(1, 1), 2, 2);
        TILE_AREA_LOOP(tile_walk, ta) {
                uint curh = TileHeight(tile_walk);
                /* Is the tile clear? */
                if ((GetTileType(tile_walk) != MP_CLEAR) && (GetTileType(tile_walk) != MP_TREES)) return false;

                /* Don't allow too big of a change if this is the sub-tile check */
                if (internal != 0 && Delta(curh, height) > 1) return false;

                /* Different height, so the surrounding tiles of this tile
                 *  has to be correct too (in level, or almost in level)
                 *  else you get a chain-reaction of terraforming. */
                if (internal == 0 && curh != height) {
                        if (TileX(tile_walk) == 0 || TileY(tile_walk) == 0 || !CheckCanTerraformSurroundingTiles(tile_walk + TileDiffXY(-1, -1), height, internal + 1)) {
                                return false;
                        }
                }
        }

        return true;
}

/**
 * This function tries to flatten out the land below an industry, without
 *  damaging the surroundings too much.
 */
static bool CheckIfCanLevelIndustryPlatform(TileIndex tile, DoCommandFlag flags, const IndustryTileTable *it, int type)
{
        const int MKEND = -0x80;   // used for last element in an IndustryTileTable (see build_industry.h)
        int max_x = 0;
        int max_y = 0;

        /* Finds dimensions of largest variant of this industry */
        do {
                if (it->gfx == 0xFF) continue;  //  FF been a marquer for a check on clear water, skip it
                if (it->ti.x > max_x) max_x = it->ti.x;
                if (it->ti.y > max_y) max_y = it->ti.y;
        } while ((++it)->ti.x != MKEND);

        /* Remember level height */
        uint h = TileHeight(tile);

        if (TileX(tile) <= _settings_game.construction.industry_platform + 1U || TileY(tile) <= _settings_game.construction.industry_platform + 1U) return false;
        /* Check that all tiles in area and surrounding are clear
         * this determines that there are no obstructing items */

        TileArea ta(tile + TileDiffXY(-_settings_game.construction.industry_platform, -_settings_game.construction.industry_platform),
                        max_x + 2 + 2 * _settings_game.construction.industry_platform, max_y + 2 + 2 * _settings_game.construction.industry_platform);

        if (TileX(ta.tile) + ta.w >= MapMaxX() || TileY(ta.tile) + ta.h >= MapMaxY()) return false;

        /* _current_company is OWNER_NONE for randomly generated industries and in editor, or the company who funded or prospected the industry.
         * Perform terraforming as OWNER_TOWN to disable autoslope and town ratings. */
        Backup<CompanyByte> cur_company(_current_company, OWNER_TOWN, FILE_LINE);

        TILE_AREA_LOOP(tile_walk, ta) {
                uint curh = TileHeight(tile_walk);
                if (curh != h) {
                        /* This tile needs terraforming. Check if we can do that without
                         *  damaging the surroundings too much. */
                        if (!CheckCanTerraformSurroundingTiles(tile_walk, h, 0)) {
                                cur_company.Restore();
                                return false;
                        }
                        /* This is not 100% correct check, but the best we can do without modifying the map.
                         *  What is missing, is if the difference in height is more than 1.. */
                        if (DoCommand(tile_walk, SLOPE_N, (curh > h) ? 0 : 1, flags & ~DC_EXEC, CMD_TERRAFORM_LAND).Failed()) {
                                cur_company.Restore();
                                return false;
                        }
                }
        }

        if (flags & DC_EXEC) {
                /* Terraform the land under the industry */
                TILE_AREA_LOOP(tile_walk, ta) {
                        uint curh = TileHeight(tile_walk);
                        while (curh != h) {
                                /* We give the terraforming for free here, because we can't calculate
                                 *  exact cost in the test-round, and as we all know, that will cause
                                 *  a nice assert if they don't match ;) */
                                DoCommand(tile_walk, SLOPE_N, (curh > h) ? 0 : 1, flags, CMD_TERRAFORM_LAND);
                                curh += (curh > h) ? -1 : 1;
                        }
                }
        }

        cur_company.Restore();
        return true;
}


/**
 * Check that the new industry is far enough from conflicting industries.
 * @param tile Tile to construct the industry.
 * @param type Type of the new industry.
 * @return Succeeded or failed command.
 */
static CommandCost CheckIfFarEnoughFromConflictingIndustry(TileIndex tile, int type)
{
        const IndustrySpec *indspec = GetIndustrySpec(type);
        const Industry *i = NULL;

        /* On a large map with many industries, it may be faster to check an area. */
        static const int dmax = 14;
        if (Industry::GetNumItems() > (size_t) (dmax * dmax * 2)) {
                const int tx = TileX(tile);
                const int ty = TileY(tile);
                TileArea tile_area = TileArea(TileXY(max(0, tx - dmax), max(0, ty - dmax)), TileXY(min(MapMaxX(), tx + dmax), min(MapMaxY(), ty + dmax)));
                TILE_AREA_LOOP(atile, tile_area) {
                        if (GetTileType(atile) == MP_INDUSTRY) {
                                const Industry *i2 = Industry::GetByTile(atile);
                                if (i == i2) continue;
                                i = i2;
                                if (DistanceMax(tile, i->location.tile) > (uint)dmax) continue;
                                if (i->type == indspec->conflicting[0] ||
                                                i->type == indspec->conflicting[1] ||
                                                i->type == indspec->conflicting[2]) {
                                        return_cmd_error(STR_ERROR_INDUSTRY_TOO_CLOSE);
                                }
                        }
                }
                return CommandCost();
        }

        FOR_ALL_INDUSTRIES(i) {
                /* Within 14 tiles from another industry is considered close */
                if (DistanceMax(tile, i->location.tile) > 14) continue;

                /* check if there are any conflicting industry types around */
                if (i->type == indspec->conflicting[0] ||
                                i->type == indspec->conflicting[1] ||
                                i->type == indspec->conflicting[2]) {
                        return_cmd_error(STR_ERROR_INDUSTRY_TOO_CLOSE);
                }
        }
        return CommandCost();
}

/**
 * Advertise about a new industry opening.
 * @param ind Industry being opened.
 */
static void AdvertiseIndustryOpening(const Industry *ind)
{
        const IndustrySpec *ind_spc = GetIndustrySpec(ind->type);
        SetDParam(0, ind_spc->name);
        if (ind_spc->new_industry_text > STR_LAST_STRINGID) {
                SetDParam(1, STR_TOWN_NAME);
                SetDParam(2, ind->town->index);
        } else {
                SetDParam(1, ind->town->index);
        }
        AddIndustryNewsItem(ind_spc->new_industry_text, NT_INDUSTRY_OPEN, ind->index);
        AI::BroadcastNewEvent(new ScriptEventIndustryOpen(ind->index));
        Game::NewEvent(new ScriptEventIndustryOpen(ind->index));
}

/**
 * Put an industry on the map.
 * @param i       Just allocated poolitem, mostly empty.
 * @param tile    North tile of the industry.
 * @param type    Type of the industry.
 * @param it      Industrylayout to build.
 * @param layout  Number of the layout.
 * @param t       Nearest town.
 * @param founder Founder of the industry; OWNER_NONE in case of random construction.
 * @param initial_random_bits Random bits for the industry.
 */
static void DoCreateNewIndustry(Industry *i, TileIndex tile, IndustryType type, const IndustryTileTable *it, byte layout, Town *t, Owner founder, uint16 initial_random_bits)
{
        const IndustrySpec *indspec = GetIndustrySpec(type);

        i->location = TileArea(tile, 1, 1);
        i->type = type;
        Industry::IncIndustryTypeCount(type);

        i->produced_cargo[0] = indspec->produced_cargo[0];
        i->produced_cargo[1] = indspec->produced_cargo[1];
        i->accepts_cargo[0] = indspec->accepts_cargo[0];
        i->accepts_cargo[1] = indspec->accepts_cargo[1];
        i->accepts_cargo[2] = indspec->accepts_cargo[2];
        i->production_rate[0] = indspec->production_rate[0];
        i->production_rate[1] = indspec->production_rate[1];

        /* don't use smooth economy for industries using production related callbacks */
        if (indspec->UsesSmoothEconomy()) {
                i->production_rate[0] = min((RandomRange(256) + 128) * i->production_rate[0] >> 8, 255);
                i->production_rate[1] = min((RandomRange(256) + 128) * i->production_rate[1] >> 8, 255);
        }

        i->town = t;
        i->owner = OWNER_NONE;

        uint16 r = Random();
        i->random_colour = GB(r, 0, 4);
        i->counter = GB(r, 4, 12);
        i->random = initial_random_bits;
        i->produced_cargo_waiting[0] = 0;
        i->produced_cargo_waiting[1] = 0;
        i->incoming_cargo_waiting[0] = 0;
        i->incoming_cargo_waiting[1] = 0;
        i->incoming_cargo_waiting[2] = 0;
        i->this_month_production[0] = 0;
        i->this_month_production[1] = 0;
        i->this_month_transported[0] = 0;
        i->this_month_transported[1] = 0;
        i->last_month_pct_transported[0] = 0;
        i->last_month_pct_transported[1] = 0;
        i->last_month_transported[0] = 0;
        i->last_month_transported[1] = 0;
        i->was_cargo_delivered = false;
        i->last_prod_year = _cur_year;
        i->founder = founder;

        i->construction_date = _date;
        i->construction_type = (_game_mode == GM_EDITOR) ? ICT_SCENARIO_EDITOR :
                        (_generating_world ? ICT_MAP_GENERATION : ICT_NORMAL_GAMEPLAY);

        /* Adding 1 here makes it conform to specs of var44 of varaction2 for industries
         * 0 = created prior of newindustries
         * else, chosen layout + 1 */
        i->selected_layout = layout + 1;

        i->prod_level = PRODLEVEL_DEFAULT;

        /* Call callbacks after the regular fields got initialised. */

        if (HasBit(indspec->callback_mask, CBM_IND_PROD_CHANGE_BUILD)) {
                uint16 res = GetIndustryCallback(CBID_INDUSTRY_PROD_CHANGE_BUILD, 0, Random(), i, type, INVALID_TILE);
                if (res != CALLBACK_FAILED) {
                        if (res < PRODLEVEL_MINIMUM || res > PRODLEVEL_MAXIMUM) {
                                ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_PROD_CHANGE_BUILD, res);
                        } else {
                                i->prod_level = res;
                                i->RecomputeProductionMultipliers();
                        }
                }
        }

        if (_generating_world) {
                i->last_month_production[0] = i->production_rate[0] * 8;
                i->last_month_production[1] = i->production_rate[1] * 8;
        } else {
                i->last_month_production[0] = i->last_month_production[1] = 0;
        }

        if (HasBit(indspec->callback_mask, CBM_IND_DECIDE_COLOUR)) {
                uint16 res = GetIndustryCallback(CBID_INDUSTRY_DECIDE_COLOUR, 0, 0, i, type, INVALID_TILE);
                if (res != CALLBACK_FAILED) {
                        if (GB(res, 4, 11) != 0) ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_DECIDE_COLOUR, res);
                        i->random_colour = GB(res, 0, 4);
                }
        }

        if (HasBit(indspec->callback_mask, CBM_IND_INPUT_CARGO_TYPES)) {
                for (uint j = 0; j < lengthof(i->accepts_cargo); j++) i->accepts_cargo[j] = CT_INVALID;
                for (uint j = 0; j < lengthof(i->accepts_cargo); j++) {
                        uint16 res = GetIndustryCallback(CBID_INDUSTRY_INPUT_CARGO_TYPES, j, 0, i, type, INVALID_TILE);
                        if (res == CALLBACK_FAILED || GB(res, 0, 8) == CT_INVALID) break;
                        if (indspec->grf_prop.grffile->grf_version >= 8 && res >= 0x100) {
                                ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_INPUT_CARGO_TYPES, res);
                                break;
                        }
                        i->accepts_cargo[j] = GetCargoTranslation(GB(res, 0, 8), indspec->grf_prop.grffile);
                }
        }

        if (HasBit(indspec->callback_mask, CBM_IND_OUTPUT_CARGO_TYPES)) {
                for (uint j = 0; j < lengthof(i->produced_cargo); j++) i->produced_cargo[j] = CT_INVALID;
                for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
                        uint16 res = GetIndustryCallback(CBID_INDUSTRY_OUTPUT_CARGO_TYPES, j, 0, i, type, INVALID_TILE);
                        if (res == CALLBACK_FAILED || GB(res, 0, 8) == CT_INVALID) break;
                        if (indspec->grf_prop.grffile->grf_version >= 8 && res >= 0x100) {
                                ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_OUTPUT_CARGO_TYPES, res);
                                break;
                        }
                        i->produced_cargo[j] = GetCargoTranslation(GB(res, 0, 8), indspec->grf_prop.grffile);
                }
        }

        /* Plant the tiles */

        do {
                TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);

                if (it->gfx != GFX_WATERTILE_SPECIALCHECK) {
                        i->location.Add(cur_tile);

                        WaterClass wc = (IsWaterTile(cur_tile) ? GetWaterClass(cur_tile) : WATER_CLASS_INVALID);

                        DoCommand(cur_tile, 0, 0, DC_EXEC | DC_NO_TEST_TOWN_RATING | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);

                        MakeIndustry(cur_tile, i->index, it->gfx, Random(), wc);

                        if (_generating_world) {
                                SetIndustryConstructionCounter(cur_tile, 3);
                                SetIndustryConstructionStage(cur_tile, 2);
                        }

                        /* it->gfx is stored in the map. But the translated ID cur_gfx is the interesting one */
                        IndustryGfx cur_gfx = GetTranslatedIndustryTileID(it->gfx);
                        const IndustryTileSpec *its = GetIndustryTileSpec(cur_gfx);
                        if (its->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(cur_tile);
                }
        } while ((++it)->ti.x != -0x80);

        if (GetIndustrySpec(i->type)->behaviour & INDUSTRYBEH_PLANT_ON_BUILT) {
                for (uint j = 0; j != 50; j++) PlantRandomFarmField(i);
        }
        InvalidateWindowData(WC_INDUSTRY_DIRECTORY, 0, 0);

        Station::RecomputeIndustriesNearForAll();
}

/**
 * Helper function for Build/Fund an industry
 * @param tile tile where industry is built
 * @param type of industry to build
 * @param flags of operations to conduct
 * @param indspec pointer to industry specifications
 * @param itspec_index the index of the itsepc to build/fund
 * @param seed random seed (possibly) used by industries
 * @param initial_random_bits The random bits the industry is going to have after construction.
 * @param founder Founder of the industry
 * @param creation_type The circumstances the industry is created under.
 * @param [out] ip Pointer to store newly created industry.
 * @return Succeeded or failed command.
 *
 * @post \c *ip contains the newly created industry if all checks are successful and the \a flags request actual creation, else it contains \c NULL afterwards.
 */
static CommandCost CreateNewIndustryHelper(TileIndex tile, IndustryType type, DoCommandFlag flags, const IndustrySpec *indspec, uint itspec_index, uint32 random_var8f, uint16 random_initial_bits, Owner founder, IndustryAvailabilityCallType creation_type, Industry **ip)
{
        assert(itspec_index < indspec->num_table);
        const IndustryTileTable *it = indspec->table[itspec_index];
        bool custom_shape_check = false;

        *ip = NULL;

        SmallVector<ClearedObjectArea, 1> object_areas(_cleared_object_areas);
        CommandCost ret = CheckIfIndustryTilesAreFree(tile, it, itspec_index, type, random_initial_bits, founder, creation_type, &custom_shape_check);
        _cleared_object_areas = object_areas;
        if (ret.Failed()) return ret;

        if (HasBit(GetIndustrySpec(type)->callback_mask, CBM_IND_LOCATION)) {
                ret = CheckIfCallBackAllowsCreation(tile, type, itspec_index, random_var8f, random_initial_bits, founder, creation_type);
        } else {
                ret = _check_new_industry_procs[indspec->check_proc](tile);
        }
        if (ret.Failed()) return ret;

        if (!custom_shape_check && _settings_game.game_creation.land_generator == LG_TERRAGENESIS && _generating_world &&
                        !_ignore_restrictions && !CheckIfCanLevelIndustryPlatform(tile, DC_NO_WATER, it, type)) {
                return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
        }

        ret = CheckIfFarEnoughFromConflictingIndustry(tile, type);
        if (ret.Failed()) return ret;

        Town *t = NULL;
        ret = FindTownForIndustry(tile, type, &t);
        if (ret.Failed()) return ret;
        assert(t != NULL);

        ret = CheckIfIndustryIsAllowed(tile, type, t);
        if (ret.Failed()) return ret;

        if (!Industry::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_INDUSTRIES);

        if (flags & DC_EXEC) {
                *ip = new Industry(tile);
                if (!custom_shape_check) CheckIfCanLevelIndustryPlatform(tile, DC_NO_WATER | DC_EXEC, it, type);
                DoCreateNewIndustry(*ip, tile, type, it, itspec_index, t, founder, random_initial_bits);
        }

        return CommandCost();
}

/**
 * Build/Fund an industry
 * @param tile tile where industry is built
 * @param flags of operations to conduct
 * @param p1 various bitstuffed elements
 * - p1 = (bit  0 -  7) - industry type see build_industry.h and see industry.h
 * - p1 = (bit  8 - 15) - first layout to try
 * - p1 = (bit 16     ) - 0 = prospect, 1 = fund (only valid if current company is DEITY)
 * @param p2 seed to use for desyncfree randomisations
 * @param text unused
 * @return the cost of this operation or an error
 */
CommandCost CmdBuildIndustry(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
        IndustryType it = GB(p1, 0, 8);
        if (it >= NUM_INDUSTRYTYPES) return CMD_ERROR;

        const IndustrySpec *indspec = GetIndustrySpec(it);

        /* Check if the to-be built/founded industry is available for this climate. */
        if (!indspec->enabled || indspec->num_table == 0) return CMD_ERROR;

        /* If the setting for raw-material industries is not on, you cannot build raw-material industries.
         * Raw material industries are industries that do not accept cargo (at least for now) */
        if (_game_mode != GM_EDITOR && _current_company != OWNER_DEITY && _settings_game.construction.raw_industry_construction == 0 && indspec->IsRawIndustry()) {
                return CMD_ERROR;
        }

        if (_game_mode != GM_EDITOR && GetIndustryProbabilityCallback(it, _current_company == OWNER_DEITY ? IACT_RANDOMCREATION : IACT_USERCREATION, 1) == 0) {
                return CMD_ERROR;
        }

        Randomizer randomizer;
        randomizer.SetSeed(p2);
        uint16 random_initial_bits = GB(p2, 0, 16);
        uint32 random_var8f = randomizer.Next();
        int num_layouts = indspec->num_table;
        CommandCost ret = CommandCost(STR_ERROR_SITE_UNSUITABLE);
        const bool deity_prospect = _current_company == OWNER_DEITY && !HasBit(p1, 16);

        Industry *ind = NULL;
        if (deity_prospect || (_game_mode != GM_EDITOR && _current_company != OWNER_DEITY && _settings_game.construction.raw_industry_construction == 2 && indspec->IsRawIndustry())) {
                if (flags & DC_EXEC) {
                        /* Prospected industries are build as OWNER_TOWN to not e.g. be build on owned land of the founder */
                        Backup<CompanyByte> cur_company(_current_company, OWNER_TOWN, FILE_LINE);
                        /* Prospecting has a chance to fail, however we cannot guarantee that something can
                         * be built on the map, so the chance gets lower when the map is fuller, but there
                         * is nothing we can really do about that. */
                        if (deity_prospect || Random() <= indspec->prospecting_chance) {
                                for (int i = 0; i < 5000; i++) {
                                        /* We should not have more than one Random() in a function call
                                         * because parameter evaluation order is not guaranteed in the c++ standard
                                         */
                                        tile = RandomTile();
                                        /* Start with a random layout */
                                        int layout = RandomRange(num_layouts);
                                        /* Check now each layout, starting with the random one */
                                        for (int j = 0; j < num_layouts; j++) {
                                                layout = (layout + 1) % num_layouts;
                                                ret = CreateNewIndustryHelper(tile, it, flags, indspec, layout, random_var8f, random_initial_bits, cur_company.GetOriginalValue(), _current_company == OWNER_DEITY ? IACT_RANDOMCREATION : IACT_PROSPECTCREATION, &ind);
                                                if (ret.Succeeded()) break;
                                        }
                                        if (ret.Succeeded()) break;
                                }
                        }
                        cur_company.Restore();
                }
        } else {
                int layout = GB(p1, 8, 8);
                if (layout >= num_layouts) return CMD_ERROR;

                /* Check subsequently each layout, starting with the given layout in p1 */
                for (int i = 0; i < num_layouts; i++) {
                        layout = (layout + 1) % num_layouts;
                        ret = CreateNewIndustryHelper(tile, it, flags, indspec, layout, random_var8f, random_initial_bits, _current_company, _current_company == OWNER_DEITY ? IACT_RANDOMCREATION : IACT_USERCREATION, &ind);
                        if (ret.Succeeded()) break;
                }

                /* If it still failed, there's no suitable layout to build here, return the error */
                if (ret.Failed()) return ret;
        }

        if ((flags & DC_EXEC) && ind != NULL && _game_mode != GM_EDITOR) {
                AdvertiseIndustryOpening(ind);
        }

        return CommandCost(EXPENSES_OTHER, indspec->GetConstructionCost());
}


/**
 * Create a new industry of random layout.
 * @param tile The location to build the industry.
 * @param type The industry type to build.
 * @param creation_type The circumstances the industry is created under.
 * @return the created industry or NULL if it failed.
 */
static Industry *CreateNewIndustry(TileIndex tile, IndustryType type, IndustryAvailabilityCallType creation_type)
{
        const IndustrySpec *indspec = GetIndustrySpec(type);

        uint32 seed = Random();
        uint32 seed2 = Random();
        Industry *ind = NULL;
        CommandCost ret;

        int layout = RandomRange(indspec->num_table);

        /* Check subsequently each layout, starting with the given layout in p1 */
        for (int i = 0; i < indspec->num_table; i++) {
                layout = (layout + 1) % indspec->num_table;
                ret = CreateNewIndustryHelper(tile, type, DC_EXEC, indspec, layout, seed, GB(seed2, 0, 16), OWNER_NONE, creation_type, &ind);
                if (ret.Succeeded()) break;
        }

        assert(ind != NULL || ret.Failed());
        return ind;
}

/**
 * Compute the appearance probability for an industry during map creation.
 * @param it Industry type to compute.
 * @param [out] force_at_least_one Returns whether at least one instance should be forced on map creation.
 * @return Relative probability for the industry to appear.
 */
static uint32 GetScaledIndustryGenerationProbability(IndustryType it, bool *force_at_least_one)
{
        const IndustrySpec *ind_spc = GetIndustrySpec(it);
        uint32 chance = ind_spc->appear_creation[_settings_game.game_creation.landscape] * 16; // * 16 to increase precision
        if (!ind_spc->enabled || ind_spc->num_table == 0 ||
                        (_game_mode != GM_EDITOR && _settings_game.difficulty.industry_density == ID_FUND_ONLY) ||
                        (chance = GetIndustryProbabilityCallback(it, IACT_MAPGENERATION, chance)) == 0) {
                *force_at_least_one = false;
                return 0;
        } else {
                /* We want industries appearing at coast to appear less often on bigger maps, as length of coast increases slower than map area.
                 * For simplicity we scale in both cases, though scaling the probabilities of all industries has no effect. */
                chance = (ind_spc->check_proc == CHECK_REFINERY || ind_spc->check_proc == CHECK_OIL_RIG) ? ScaleByMapSize1D(chance) : ScaleByMapSize(chance);

                *force_at_least_one = (chance > 0) && !(ind_spc->behaviour & INDUSTRYBEH_NOBUILT_MAPCREATION) && (_game_mode != GM_EDITOR);
                return chance;
        }
}

/**
 * Compute the probability for constructing a new industry during game play.
 * @param it Industry type to compute.
 * @param [out] min_number Minimal number of industries that should exist at the map.
 * @return Relative probability for the industry to appear.
 */
static uint16 GetIndustryGamePlayProbability(IndustryType it, byte *min_number)
{
        if (_settings_game.difficulty.industry_density == ID_FUND_ONLY) {
                *min_number = 0;
                return 0;
        }

        const IndustrySpec *ind_spc = GetIndustrySpec(it);
        byte chance = ind_spc->appear_ingame[_settings_game.game_creation.landscape];
        if (!ind_spc->enabled || ind_spc->num_table == 0 ||
                        ((ind_spc->behaviour & INDUSTRYBEH_BEFORE_1950) && _cur_year > 1950) ||
                        ((ind_spc->behaviour & INDUSTRYBEH_AFTER_1960) && _cur_year < 1960) ||
                        (chance = GetIndustryProbabilityCallback(it, IACT_RANDOMCREATION, chance)) == 0) {
                *min_number = 0;
                return 0;
        }
        *min_number = (ind_spc->behaviour & INDUSTRYBEH_CANCLOSE_LASTINSTANCE) ? 1 : 0;
        return chance;
}

/**
 * Get wanted number of industries on the map.
 * @return Wanted number of industries at the map.
 */
static uint GetNumberOfIndustries()
{
        /* Number of industries on a 256x256 map. */
        static const uint16 numof_industry_table[] = {
                0,    // none
                0,    // minimal
                10,   // very low
                25,   // low
                55,   // normal
                80,   // high
        };

        assert(lengthof(numof_industry_table) == ID_END);
        uint difficulty = (_game_mode != GM_EDITOR) ? _settings_game.difficulty.industry_density : (uint)ID_VERY_LOW;
        return min(IndustryPool::MAX_SIZE, ScaleByMapSize(numof_industry_table[difficulty]));
}

/**
 * Try to place the industry in the game.
 * Since there is no feedback why placement fails, there is no other option
 * than to try a few times before concluding it does not work.
 * @param type     Industry type of the desired industry.
 * @param try_hard Try very hard to find a place. (Used to place at least one industry per type.)
 * @return Pointer to created industry, or \c NULL if creation failed.
 */
static Industry *PlaceIndustry(IndustryType type, IndustryAvailabilityCallType creation_type, bool try_hard)
{
        uint tries = try_hard ? 10000u : 2000u;
        for (; tries > 0; tries--) {
                Industry *ind = CreateNewIndustry(RandomTile(), type, creation_type);
                if (ind != NULL) return ind;
        }
        return NULL;
}

/**
 * Try to build a industry on the map.
 * @param type IndustryType of the desired industry
 * @param try_hard Try very hard to find a place. (Used to place at least one industry per type)
 */
static void PlaceInitialIndustry(IndustryType type, bool try_hard)
{
        Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);

        IncreaseGeneratingWorldProgress(GWP_INDUSTRY);
        PlaceIndustry(type, IACT_MAPGENERATION, try_hard);

        cur_company.Restore();
}

/**
 * Get total number of industries existing in the game.
 * @return Number of industries currently in the game.
 */
static uint GetCurrentTotalNumberOfIndustries()
{
        int total = 0;
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) total += Industry::GetIndustryTypeCount(it);
        return total;
}


/** Reset the entry. */
void IndustryTypeBuildData::Reset()
{
        this->probability  = 0;
        this->min_number   = 0;
        this->target_count = 0;
        this->max_wait     = 1;
        this->wait_count   = 0;
}

/** Completely reset the industry build data. */
void IndustryBuildData::Reset()
{
        this->wanted_inds = GetCurrentTotalNumberOfIndustries() << 16;

        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                this->builddata[it].Reset();
        }
}

/** Monthly update of industry build data. */
void IndustryBuildData::MonthlyLoop()
{
        static const int NEWINDS_PER_MONTH = 0x38000 / (10 * 12); // lower 16 bits is a float fraction, 3.5 industries per decade, divided by 10 * 12 months.
        if (_settings_game.difficulty.industry_density == ID_FUND_ONLY) return; // 'no industries' setting.

        /* To prevent running out of unused industries for the player to connect,
         * add a fraction of new industries each month, but only if the manager can keep up. */
        uint max_behind = 1 + min(99u, ScaleByMapSize(3)); // At most 2 industries for small maps, and 100 at the biggest map (about 6 months industry build attempts).
        if (GetCurrentTotalNumberOfIndustries() + max_behind >= (this->wanted_inds >> 16)) {
                this->wanted_inds += ScaleByMapSize(NEWINDS_PER_MONTH);
        }
}

/**
 * This function will create random industries during game creation.
 * It will scale the amount of industries by mapsize and difficulty level.
 */
void GenerateIndustries()
{
        if (_game_mode != GM_EDITOR && _settings_game.difficulty.industry_density == ID_FUND_ONLY) return; // No industries in the game.

        uint32 industry_probs[NUM_INDUSTRYTYPES];
        bool force_at_least_one[NUM_INDUSTRYTYPES];
        uint32 total_prob = 0;
        uint num_forced = 0;

        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                industry_probs[it] = GetScaledIndustryGenerationProbability(it, force_at_least_one + it);
                total_prob += industry_probs[it];
                if (force_at_least_one[it]) num_forced++;
        }

        uint total_amount = GetNumberOfIndustries();
        if (total_prob == 0 || total_amount < num_forced) {
                /* Only place the forced ones */
                total_amount = num_forced;
        }

        SetGeneratingWorldProgress(GWP_INDUSTRY, total_amount);

        /* Try to build one industry per type independent of any probabilities */
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                if (force_at_least_one[it]) {
                        assert(total_amount > 0);
                        total_amount--;
                        PlaceInitialIndustry(it, true);
                }
        }

        /* Add the remaining industries according to their probabilities */
        for (uint i = 0; i < total_amount; i++) {
                uint32 r = RandomRange(total_prob);
                IndustryType it = 0;
                while (r >= industry_probs[it]) {
                        r -= industry_probs[it];
                        it++;
                        assert(it < NUM_INDUSTRYTYPES);
                }
                assert(industry_probs[it] > 0);
                PlaceInitialIndustry(it, false);
        }
        _industry_builder.Reset();
}

/**
 * Monthly update of industry statistics.
 * @param i Industry to update.
 */
static void UpdateIndustryStatistics(Industry *i)
{
        for (byte j = 0; j < lengthof(i->produced_cargo); j++) {
                if (i->produced_cargo[j] != CT_INVALID) {
                        byte pct = 0;
                        if (i->this_month_production[j] != 0) {
                                i->last_prod_year = _cur_year;
                                pct = min(i->this_month_transported[j] * 256 / i->this_month_production[j], 255);
                        }
                        i->last_month_pct_transported[j] = pct;

                        i->last_month_production[j] = i->this_month_production[j];
                        i->this_month_production[j] = 0;

                        i->last_month_transported[j] = i->this_month_transported[j];
                        i->this_month_transported[j] = 0;
                }
        }
}

/**
 * Recompute #production_rate for current #prod_level.
 * This function is only valid when not using smooth economy.
 */
void Industry::RecomputeProductionMultipliers()
{
        const IndustrySpec *indspec = GetIndustrySpec(this->type);
        assert(!indspec->UsesSmoothEconomy());

        /* Rates are rounded up, so e.g. oilrig always produces some passengers */
        this->production_rate[0] = min(CeilDiv(indspec->production_rate[0] * this->prod_level, PRODLEVEL_DEFAULT), 0xFF);
        this->production_rate[1] = min(CeilDiv(indspec->production_rate[1] * this->prod_level, PRODLEVEL_DEFAULT), 0xFF);
}


/**
 * Set the #probability and #min_number fields for the industry type \a it for a running game.
 * @param it Industry type.
 * @return At least one of the fields has changed value.
 */
bool IndustryTypeBuildData::GetIndustryTypeData(IndustryType it)
{
        byte min_number;
        uint32 probability = GetIndustryGamePlayProbability(it, &min_number);
        bool changed = min_number != this->min_number || probability != this->probability;
        this->min_number = min_number;
        this->probability = probability;
        return changed;
}

/** Decide how many industries of each type are needed. */
void IndustryBuildData::SetupTargetCount()
{
        bool changed = false;
        uint num_planned = 0; // Number of industries planned in the industry build data.
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                changed |= this->builddata[it].GetIndustryTypeData(it);
                num_planned += this->builddata[it].target_count;
        }
        uint total_amount = this->wanted_inds >> 16; // Desired total number of industries.
        changed |= num_planned != total_amount;
        if (!changed) return; // All industries are still the same, no need to re-randomize.

        /* Initialize the target counts. */
        uint force_build = 0;  // Number of industries that should always be available.
        uint32 total_prob = 0; // Sum of probabilities.
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                IndustryTypeBuildData *ibd = this->builddata + it;
                force_build += ibd->min_number;
                ibd->target_count = ibd->min_number;
                total_prob += ibd->probability;
        }

        if (total_prob == 0) return; // No buildable industries.

        /* Subtract forced industries from the number of industries available for construction. */
        total_amount = (total_amount <= force_build) ? 0 : total_amount - force_build;

        /* Assign number of industries that should be aimed for, by using the probability as a weight. */
        while (total_amount > 0) {
                uint32 r = RandomRange(total_prob);
                IndustryType it = 0;
                while (r >= this->builddata[it].probability) {
                        r -= this->builddata[it].probability;
                        it++;
                        assert(it < NUM_INDUSTRYTYPES);
                }
                assert(this->builddata[it].probability > 0);
                this->builddata[it].target_count++;
                total_amount--;
        }
}

/**
 * Try to create a random industry, during gameplay
 */
void IndustryBuildData::TryBuildNewIndustry()
{
        this->SetupTargetCount();

        int missing = 0;       // Number of industries that need to be build.
        uint count = 0;        // Number of industry types eligible for build.
        uint32 total_prob = 0; // Sum of probabilities.
        IndustryType forced_build = NUM_INDUSTRYTYPES; // Industry type that should be forcibly build.
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                int difference = this->builddata[it].target_count - Industry::GetIndustryTypeCount(it);
                missing += difference;
                if (this->builddata[it].wait_count > 0) continue; // This type may not be built now.
                if (difference > 0) {
                        if (Industry::GetIndustryTypeCount(it) == 0 && this->builddata[it].min_number > 0) {
                                /* An industry that should exist at least once, is not available. Force it, trying the most needed one first. */
                                if (forced_build == NUM_INDUSTRYTYPES ||
                                                difference > this->builddata[forced_build].target_count - Industry::GetIndustryTypeCount(forced_build)) {
                                        forced_build = it;
                                }
                        }
                        total_prob += difference;
                        count++;
                }
        }

        if (EconomyIsInRecession() || (forced_build == NUM_INDUSTRYTYPES && (missing <= 0 || total_prob == 0))) count = 0; // Skip creation of an industry.

        if (count >= 1) {
                /* If not forced, pick a weighted random industry to build.
                 * For the case that count == 1, there is no need to draw a random number. */
                IndustryType it;
                if (forced_build != NUM_INDUSTRYTYPES) {
                        it = forced_build;
                } else {
                        /* Non-forced, select an industry type to build (weighted random). */
                        uint32 r = 0; // Initialized to silence the compiler.
                        if (count > 1) r = RandomRange(total_prob);
                        for (it = 0; it < NUM_INDUSTRYTYPES; it++) {
                                if (this->builddata[it].wait_count > 0) continue; // Type may not be built now.
                                int difference = this->builddata[it].target_count - Industry::GetIndustryTypeCount(it);
                                if (difference <= 0) continue; // Too many of this kind.
                                if (count == 1) break;
                                if (r < (uint)difference) break;
                                r -= difference;
                        }
                        assert(it < NUM_INDUSTRYTYPES && this->builddata[it].target_count > Industry::GetIndustryTypeCount(it));
                }

                /* Try to create the industry. */
                const Industry *ind = PlaceIndustry(it, IACT_RANDOMCREATION, forced_build != NUM_INDUSTRYTYPES);
                if (ind == NULL) {
                        this->builddata[it].wait_count = this->builddata[it].max_wait + 1; // Compensate for decrementing below.
                        this->builddata[it].max_wait = min(1000, this->builddata[it].max_wait + 2);
                } else {
                        AdvertiseIndustryOpening(ind);
                        this->builddata[it].max_wait = max(this->builddata[it].max_wait / 2, 1); // Reduce waiting time of the industry type.
                }
        }

        /* Decrement wait counters. */
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                if (this->builddata[it].wait_count > 0) this->builddata[it].wait_count--;
        }
}

/**
 * Protects an industry from closure if the appropriate flags and conditions are met
 * INDUSTRYBEH_CANCLOSE_LASTINSTANCE must be set (which, by default, it is not) and the
 * count of industries of this type must one (or lower) in order to be protected
 * against closure.
 * @param type IndustryType been queried
 * @result true if protection is on, false otherwise (except for oil wells)
 */
static bool CheckIndustryCloseDownProtection(IndustryType type)
{
        const IndustrySpec *indspec = GetIndustrySpec(type);

        /* oil wells (or the industries with that flag set) are always allowed to closedown */
        if ((indspec->behaviour & INDUSTRYBEH_DONT_INCR_PROD) && _settings_game.game_creation.landscape == LT_TEMPERATE) return false;
        return (indspec->behaviour & INDUSTRYBEH_CANCLOSE_LASTINSTANCE) == 0 && Industry::GetIndustryTypeCount(type) <= 1;
}

/**
 * Can given cargo type be accepted or produced by the industry?
 * @param cargo: Cargo type
 * @param ind: Industry
 * @param *c_accepts: Pointer to boolean for acceptance of cargo
 * @param *c_produces: Pointer to boolean for production of cargo
 * @return: \c *c_accepts is set when industry accepts the cargo type,
 *          \c *c_produces is set when the industry produces the cargo type
 */
static void CanCargoServiceIndustry(CargoID cargo, Industry *ind, bool *c_accepts, bool *c_produces)
{
        if (cargo == CT_INVALID) return;

        /* Check for acceptance of cargo */
        for (byte j = 0; j < lengthof(ind->accepts_cargo); j++) {
                if (cargo == ind->accepts_cargo[j] && !IndustryTemporarilyRefusesCargo(ind, cargo)) {
                        *c_accepts = true;
                        break;
                }
        }

        /* Check for produced cargo */
        for (byte j = 0; j < lengthof(ind->produced_cargo); j++) {
                if (cargo == ind->produced_cargo[j]) {
                        *c_produces = true;
                        break;
                }
        }
}

/**
 * Compute who can service the industry.
 *
 * Here, 'can service' means that he/she has trains and stations close enough
 * to the industry with the right cargo type and the right orders (ie has the
 * technical means).
 *
 * @param ind: Industry being investigated.
 *
 * @return: 0 if nobody can service the industry, 2 if the local company can
 * service the industry, and 1 otherwise (only competitors can service the
 * industry)
 */
static int WhoCanServiceIndustry(Industry *ind)
{
        /* Find all stations within reach of the industry */
        StationList stations;
        FindStationsAroundTiles(ind->location, &stations);

        if (stations.Length() == 0) return 0; // No stations found at all => nobody services

        const Vehicle *v;
        int result = 0;
        FOR_ALL_VEHICLES(v) {
                /* Is it worthwhile to try this vehicle? */
                if (v->owner != _local_company && result != 0) continue;

                /* Check whether it accepts the right kind of cargo */
                bool c_accepts = false;
                bool c_produces = false;
                if (v->type == VEH_TRAIN && v->IsFrontEngine()) {
                        for (const Vehicle *u = v; u != NULL; u = u->Next()) {
                                CanCargoServiceIndustry(u->cargo_type, ind, &c_accepts, &c_produces);
                        }
                } else if (v->type == VEH_ROAD || v->type == VEH_SHIP || v->type == VEH_AIRCRAFT) {
                        CanCargoServiceIndustry(v->cargo_type, ind, &c_accepts, &c_produces);
                } else {
                        continue;
                }
                if (!c_accepts && !c_produces) continue; // Wrong cargo

                /* Check orders of the vehicle.
                 * We cannot check the first of shared orders only, since the first vehicle in such a chain
                 * may have a different cargo type.
                 */
                const Order *o;
                FOR_VEHICLE_ORDERS(v, o) {
                        if (o->IsType(OT_GOTO_STATION) && !(o->GetUnloadType() & OUFB_TRANSFER)) {
                                /* Vehicle visits a station to load or unload */
                                Station *st = Station::Get(o->GetDestination());
                                assert(st != NULL);

                                /* Same cargo produced by industry is dropped here => not serviced by vehicle v */
                                if ((o->GetUnloadType() & OUFB_UNLOAD) && !c_accepts) break;

                                if (stations.Contains(st)) {
                                        if (v->owner == _local_company) return 2; // Company services industry
                                        result = 1; // Competitor services industry
                                }
                        }
                }
        }
        return result;
}

/**
 * Report news that industry production has changed significantly
 *
 * @param ind: Industry with changed production
 * @param type: Cargo type that has changed
 * @param percent: Percentage of change (>0 means increase, <0 means decrease)
 */
static void ReportNewsProductionChangeIndustry(Industry *ind, CargoID type, int percent)
{
        NewsType nt;

        switch (WhoCanServiceIndustry(ind)) {
                case 0: nt = NT_INDUSTRY_NOBODY;  break;
                case 1: nt = NT_INDUSTRY_OTHER;   break;
                case 2: nt = NT_INDUSTRY_COMPANY; break;
                default: NOT_REACHED();
        }
        SetDParam(2, abs(percent));
        SetDParam(0, CargoSpec::Get(type)->name);
        SetDParam(1, ind->index);
        AddIndustryNewsItem(
                percent >= 0 ? STR_NEWS_INDUSTRY_PRODUCTION_INCREASE_SMOOTH : STR_NEWS_INDUSTRY_PRODUCTION_DECREASE_SMOOTH,
                nt,
                ind->index
        );
}

static const uint PERCENT_TRANSPORTED_60 = 153;
static const uint PERCENT_TRANSPORTED_80 = 204;

/**
 * Change industry production or do closure
 * @param i Industry for which changes are performed
 * @param monthly true if it's the monthly call, false if it's the random call
 */
static void ChangeIndustryProduction(Industry *i, bool monthly)
{
        StringID str = STR_NULL;
        bool closeit = false;
        const IndustrySpec *indspec = GetIndustrySpec(i->type);
        bool standard = false;
        bool suppress_message = false;
        bool recalculate_multipliers = false; ///< reinitialize production_rate to match prod_level
        /* don't use smooth economy for industries using production related callbacks */
        bool smooth_economy = indspec->UsesSmoothEconomy();
        byte div = 0;
        byte mul = 0;
        int8 increment = 0;

        bool callback_enabled = HasBit(indspec->callback_mask, monthly ? CBM_IND_MONTHLYPROD_CHANGE : CBM_IND_PRODUCTION_CHANGE);
        if (callback_enabled) {
                uint16 res = GetIndustryCallback(monthly ? CBID_INDUSTRY_MONTHLYPROD_CHANGE : CBID_INDUSTRY_PRODUCTION_CHANGE, 0, Random(), i, i->type, i->location.tile);
                if (res != CALLBACK_FAILED) { // failed callback means "do nothing"
                        suppress_message = HasBit(res, 7);
                        /* Get the custom message if any */
                        if (HasBit(res, 8)) str = MapGRFStringID(indspec->grf_prop.grffile->grfid, GB(GetRegister(0x100), 0, 16));
                        res = GB(res, 0, 4);
                        switch (res) {
                                default: NOT_REACHED();
                                case 0x0: break;                  // Do nothing, but show the custom message if any
                                case 0x1: div = 1; break;         // Halve industry production. If production reaches the quarter of the default, the industry is closed instead.
                                case 0x2: mul = 1; break;         // Double industry production if it hasn't reached eight times of the original yet.
                                case 0x3: closeit = true; break;  // The industry announces imminent closure, and is physically removed from the map next month.
                                case 0x4: standard = true; break; // Do the standard random production change as if this industry was a primary one.
                                case 0x5: case 0x6: case 0x7:     // Divide production by 4, 8, 16
                                case 0x8: div = res - 0x3; break; // Divide production by 32
                                case 0x9: case 0xA: case 0xB:     // Multiply production by 4, 8, 16
                                case 0xC: mul = res - 0x7; break; // Multiply production by 32
                                case 0xD:                         // decrement production
                                case 0xE:                         // increment production
                                        increment = res == 0x0D ? -1 : 1;
                                        break;
                                case 0xF:                         // Set production to third byte of register 0x100
                                        i->prod_level = Clamp(GB(GetRegister(0x100), 16, 8), PRODLEVEL_MINIMUM, PRODLEVEL_MAXIMUM);
                                        recalculate_multipliers = true;
                                        break;
                        }
                }
        } else {
                if (monthly != smooth_economy) return;
                if (indspec->life_type == INDUSTRYLIFE_BLACK_HOLE) return;
        }

        if (standard || (!callback_enabled && (indspec->life_type & (INDUSTRYLIFE_ORGANIC | INDUSTRYLIFE_EXTRACTIVE)) != 0)) {
                /* decrease or increase */
                bool only_decrease = (indspec->behaviour & INDUSTRYBEH_DONT_INCR_PROD) && _settings_game.game_creation.landscape == LT_TEMPERATE;

                if (smooth_economy) {
                        closeit = true;
                        for (byte j = 0; j < lengthof(i->produced_cargo); j++) {
                                if (i->produced_cargo[j] == CT_INVALID) continue;
                                uint32 r = Random();
                                int old_prod, new_prod, percent;
                                /* If over 60% is transported, mult is 1, else mult is -1. */
                                int mult = (i->last_month_pct_transported[j] > PERCENT_TRANSPORTED_60) ? 1 : -1;

                                new_prod = old_prod = i->production_rate[j];

                                /* For industries with only_decrease flags (temperate terrain Oil Wells),
                                 * the multiplier will always be -1 so they will only decrease. */
                                if (only_decrease) {
                                        mult = -1;
                                /* For normal industries, if over 60% is transported, 33% chance for decrease.
                                 * Bonus for very high station ratings (over 80%): 16% chance for decrease. */
                                } else if (Chance16I(1, ((i->last_month_pct_transported[j] > PERCENT_TRANSPORTED_80) ? 6 : 3), r)) {
                                        mult *= -1;
                                }

                                /* 4.5% chance for 3-23% (or 1 unit for very low productions) production change,
                                 * determined by mult value. If mult = 1 prod. increases, else (-1) it decreases. */
                                if (Chance16I(1, 22, r >> 16)) {
                                        new_prod += mult * (max(((RandomRange(50) + 10) * old_prod) >> 8, 1U));
                                }

                                /* Prevent production to overflow or Oil Rig passengers to be over-"produced" */
                                new_prod = Clamp(new_prod, 1, 255);

                                if (((indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) != 0) && j == 1) {
                                        new_prod = Clamp(new_prod, 0, 16);
                                }

                                /* Do not stop closing the industry when it has the lowest possible production rate */
                                if (new_prod == old_prod && old_prod > 1) {
                                        closeit = false;
                                        continue;
                                }

                                percent = (old_prod == 0) ? 100 : (new_prod * 100 / old_prod - 100);
                                i->production_rate[j] = new_prod;

                                /* Close the industry when it has the lowest possible production rate */
                                if (new_prod > 1) closeit = false;

                                if (abs(percent) >= 10) {
                                        ReportNewsProductionChangeIndustry(i, i->produced_cargo[j], percent);
                                }
                        }
                } else {
                        if (only_decrease || Chance16(1, 3)) {
                                /* If more than 60% transported, 66% chance of increase, else 33% chance of increase */
                                if (!only_decrease && (i->last_month_pct_transported[0] > PERCENT_TRANSPORTED_60) != Chance16(1, 3)) {
                                        mul = 1; // Increase production
                                } else {
                                        div = 1; // Decrease production
                                }
                        }
                }
        }

        if (!callback_enabled && (indspec->life_type & INDUSTRYLIFE_PROCESSING)) {
                if ( (byte)(_cur_year - i->last_prod_year) >= 5 && Chance16(1, smooth_economy ? 180 : 2)) {
                        closeit = true;
                }
        }

        /* Increase if needed */
        while (mul-- != 0 && i->prod_level < PRODLEVEL_MAXIMUM) {
                i->prod_level = min(i->prod_level * 2, PRODLEVEL_MAXIMUM);
                recalculate_multipliers = true;
                if (str == STR_NULL) str = indspec->production_up_text;
        }

        /* Decrease if needed */
        while (div-- != 0 && !closeit) {
                if (i->prod_level == PRODLEVEL_MINIMUM) {
                        closeit = true;
                } else {
                        i->prod_level = max(i->prod_level / 2, (int)PRODLEVEL_MINIMUM); // typecast to int required to please MSVC
                        recalculate_multipliers = true;
                        if (str == STR_NULL) str = indspec->production_down_text;
                }
        }

        /* Increase or Decreasing the production level if needed */
        if (increment != 0) {
                if (increment < 0 && i->prod_level == PRODLEVEL_MINIMUM) {
                        closeit = true;
                } else {
                        i->prod_level = ClampU(i->prod_level + increment, PRODLEVEL_MINIMUM, PRODLEVEL_MAXIMUM);
                        recalculate_multipliers = true;
                }
        }

        /* Recalculate production_rate
         * For non-smooth economy these should always be synchronized with prod_level */
        if (recalculate_multipliers) i->RecomputeProductionMultipliers();

        /* Close if needed and allowed */
        if (closeit && !CheckIndustryCloseDownProtection(i->type)) {
                i->prod_level = PRODLEVEL_CLOSURE;
                SetWindowDirty(WC_INDUSTRY_VIEW, i->index);
                str = indspec->closure_text;
        }

        if (!suppress_message && str != STR_NULL) {
                NewsType nt;
                /* Compute news category */
                if (closeit) {
                        nt = NT_INDUSTRY_CLOSE;
                        AI::BroadcastNewEvent(new ScriptEventIndustryClose(i->index));
                        Game::NewEvent(new ScriptEventIndustryClose(i->index));
                } else {
                        switch (WhoCanServiceIndustry(i)) {
                                case 0: nt = NT_INDUSTRY_NOBODY;  break;
                                case 1: nt = NT_INDUSTRY_OTHER;   break;
                                case 2: nt = NT_INDUSTRY_COMPANY; break;
                                default: NOT_REACHED();
                        }
                }
                /* Set parameters of news string */
                if (str > STR_LAST_STRINGID) {
                        SetDParam(0, STR_TOWN_NAME);
                        SetDParam(1, i->town->index);
                        SetDParam(2, indspec->name);
                } else if (closeit) {
                        SetDParam(0, STR_FORMAT_INDUSTRY_NAME);
                        SetDParam(1, i->town->index);
                        SetDParam(2, indspec->name);
                } else {
                        SetDParam(0, i->index);
                }
                /* and report the news to the user */
                if (closeit) {
                        AddTileNewsItem(str, nt, i->location.tile + TileDiffXY(1, 1));
                } else {
                        AddIndustryNewsItem(str, nt, i->index);
                }
        }
}

/**
 * Daily handler for the industry changes
 * Taking the original map size of 256*256, the number of random changes was always of just one unit.
 * But it cannot be the same on smaller or bigger maps. That number has to be scaled up or down.
 * For small maps, it implies that less than one change per month is required, while on bigger maps,
 * it would be way more. The daily loop handles those changes.
 */
void IndustryDailyLoop()
{
        _economy.industry_daily_change_counter += _economy.industry_daily_increment;

        /* Bits 16-31 of industry_construction_counter contain the number of industries to change/create today,
         * the lower 16 bit are a fractional part that might accumulate over several days until it
         * is sufficient for an industry. */
        uint16 change_loop = _economy.industry_daily_change_counter >> 16;

        /* Reset the active part of the counter, just keeping the "fractional part" */
        _economy.industry_daily_change_counter &= 0xFFFF;

        if (change_loop == 0) {
                return;  // Nothing to do? get out
        }

        Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);

        /* perform the required industry changes for the day */

        uint perc = 3; // Between 3% and 9% chance of creating a new industry.
        if ((_industry_builder.wanted_inds >> 16) > GetCurrentTotalNumberOfIndustries()) {
                perc = min(9u, perc + (_industry_builder.wanted_inds >> 16) - GetCurrentTotalNumberOfIndustries());
        }
        for (uint16 j = 0; j < change_loop; j++) {
                /* industry for taxes */
                if (_economy.industry_helper > _price[PR_BUILD_INDUSTRY] << 3) {
                        _economy.industry_helper -= _price[PR_BUILD_INDUSTRY] << 3;
                        _industry_builder.TryBuildNewIndustry();
                } else if (Chance16(3, 100)) {
                        _industry_builder.TryBuildNewIndustry();
                } else {
                        Industry *i = Industry::GetRandom();
                        if (i != NULL) {
                                ChangeIndustryProduction(i, false);
                                SetWindowDirty(WC_INDUSTRY_VIEW, i->index);
                        }
                }
        }

        cur_company.Restore();

        /* production-change */
        InvalidateWindowData(WC_INDUSTRY_DIRECTORY, 0, 1);
}

void IndustryMonthlyLoop()
{
        Backup<CompanyByte> cur_company(_current_company, OWNER_NONE, FILE_LINE);

        _industry_builder.MonthlyLoop();

        Industry *i;
        FOR_ALL_INDUSTRIES(i) {
                UpdateIndustryStatistics(i);
                if (i->prod_level == PRODLEVEL_CLOSURE) {
                        delete i;
                } else {
                        ChangeIndustryProduction(i, true);
                        SetWindowDirty(WC_INDUSTRY_VIEW, i->index);
                }
        }

        cur_company.Restore();

        /* production-change */
        InvalidateWindowData(WC_INDUSTRY_DIRECTORY, 0, 1);
}


void InitializeIndustries()
{
        Industry::ResetIndustryCounts();
        _industry_sound_tile = 0;

        _industry_builder.Reset();
}

/** Verify whether the generated industries are complete, and warn the user if not. */
void CheckIndustries()
{
        int count = 0;
        for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
                if (Industry::GetIndustryTypeCount(it) > 0) continue; // Types of existing industries can be skipped.

                bool force_at_least_one;
                uint32 chance = GetScaledIndustryGenerationProbability(it, &force_at_least_one);
                if (chance == 0 || !force_at_least_one) continue; // Types that are not available can be skipped.

                const IndustrySpec *is = GetIndustrySpec(it);
                SetDParam(0, is->name);
                ShowErrorMessage(STR_ERROR_NO_SUITABLE_PLACES_FOR_INDUSTRIES, STR_ERROR_NO_SUITABLE_PLACES_FOR_INDUSTRIES_EXPLANATION, WL_WARNING);

                count++;
                if (count >= 3) break; // Don't swamp the user with errors.
        }
}

/**
 * Is an industry with the spec a raw industry?
 * @return true if it should be handled as a raw industry
 */
bool IndustrySpec::IsRawIndustry() const
{
        return (this->life_type & (INDUSTRYLIFE_EXTRACTIVE | INDUSTRYLIFE_ORGANIC)) != 0;
}

/**
 * Is an industry with the spec a processing industry?
 * @return true if it should be handled as a processing industry
 */
bool IndustrySpec::IsProcessingIndustry() const
{
        /* Lumber mills are neither raw nor processing */
        return (this->life_type & INDUSTRYLIFE_PROCESSING) != 0 &&
                        (this->behaviour & INDUSTRYBEH_CUT_TREES) == 0;
}

/**
 * Get the cost for constructing this industry
 * @return the cost (inflation corrected etc)
 */
Money IndustrySpec::GetConstructionCost() const
{
        /* Building raw industries like secondary uses different price base */
        return (_price[(_settings_game.construction.raw_industry_construction == 1 && this->IsRawIndustry()) ?
                        PR_BUILD_INDUSTRY_RAW : PR_BUILD_INDUSTRY] * this->cost_multiplier) >> 8;
}

/**
 * Get the cost for removing this industry
 * Take note that the cost will always be zero for non-grf industries.
 * Only if the grf author did specified a cost will it be applicable.
 * @return the cost (inflation corrected etc)
 */
Money IndustrySpec::GetRemovalCost() const
{
        return (_price[PR_CLEAR_INDUSTRY] * this->removal_cost_multiplier) >> 8;
}

/**
 * Determines whether this industrytype uses smooth economy or whether it uses standard/newgrf production changes.
 * @return true if smooth economy is used.
 */
bool IndustrySpec::UsesSmoothEconomy() const
{
        return _settings_game.economy.smooth_economy &&
                !(HasBit(this->callback_mask, CBM_IND_PRODUCTION_256_TICKS) || HasBit(this->callback_mask, CBM_IND_PRODUCTION_CARGO_ARRIVAL)) && // production callbacks
                !(HasBit(this->callback_mask, CBM_IND_MONTHLYPROD_CHANGE) || HasBit(this->callback_mask, CBM_IND_PRODUCTION_CHANGE) || HasBit(this->callback_mask, CBM_IND_PROD_CHANGE_BUILD)); // production change callbacks
}

static CommandCost TerraformTile_Industry(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
{
        if (AutoslopeEnabled()) {
                /* We imitate here TTDP's behaviour:
                 *  - Both new and old slope must not be steep.
                 *  - TileMaxZ must not be changed.
                 *  - Allow autoslope by default.
                 *  - Disallow autoslope if callback succeeds and returns non-zero.
                 */
                Slope tileh_old = GetTileSlope(tile);
                /* TileMaxZ must not be changed. Slopes must not be steep. */
                if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
                        const IndustryGfx gfx = GetIndustryGfx(tile);
                        const IndustryTileSpec *itspec = GetIndustryTileSpec(gfx);

                        /* Call callback 3C 'disable autosloping for industry tiles'. */
                        if (HasBit(itspec->callback_mask, CBM_INDT_AUTOSLOPE)) {
                                /* If the callback fails, allow autoslope. */
                                uint16 res = GetIndustryTileCallback(CBID_INDTILE_AUTOSLOPE, 0, 0, gfx, Industry::GetByTile(tile), tile);
                                if (res == CALLBACK_FAILED || !ConvertBooleanCallback(itspec->grf_prop.grffile, CBID_INDTILE_AUTOSLOPE, res)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
                        } else {
                                /* allow autoslope */
                                return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
                        }
                }
        }
        return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}

extern const TileTypeProcs _tile_type_industry_procs = {
        DrawTile_Industry,           // draw_tile_proc
        GetSlopePixelZ_Industry,     // get_slope_z_proc
        ClearTile_Industry,          // clear_tile_proc
        AddAcceptedCargo_Industry,   // add_accepted_cargo_proc
        GetTileDesc_Industry,        // get_tile_desc_proc
        GetTileTrackStatus_Industry, // get_tile_track_status_proc
        ClickTile_Industry,          // click_tile_proc
        AnimateTile_Industry,        // animate_tile_proc
        TileLoop_Industry,           // tile_loop_proc
        ChangeTileOwner_Industry,    // change_tile_owner_proc
        NULL,                        // add_produced_cargo_proc
        NULL,                        // vehicle_enter_tile_proc
        GetFoundation_Industry,      // get_foundation_proc
        TerraformTile_Industry,      // terraform_tile_proc
};