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[Urist Sonuvagimli]

The new multi-tile trees make my gaming machine weep!

I chose to embark in a desert. Thes site looked like a complete wasteland - there were 2 trees on the map, these were immideately cut down for timber.

2 years have since passed. On spring the 1st Granite 252 there was a signiicant slowdown. Looking at a map again:

Spoiler (click to show/hide)

The entire desert has turned into a Saguaro jungle overnight. Image above is but a portion of the map - there are countless trees on the other side as well. Naturally, framerate went down.

Now the harsh barren wasteland to be conquered has turned into sluggish elven retreat. I've tried cutting some trees down, though, with 30 FPS and 100 dwarves it is going to take forever.  Can DFhack help?

[Boltgun]

Dfhack can only help crashing the game as manipulating trees is unstable.

You have 100 dwarves however, you can make a bunch of battle axes and send them all to cut down the tree menace. Limit the number of haulers afterwards because you're going to have a lot of lumber.

Bonus effect: Elves will be pissed.

[Urist Sonuvagimli]

Yes, looks like cutting down trees is the only choice. However, this is not the first treesplosion I experience. Pretty much anywhere I choose to embark trees grow and multiply with tremendous speed. Only the glaciers are safe from these lumbering FPS killers.

Is there any way to prevent trees from growing at all on the map? Besides flooding the world with magma?

[Blastbeard]

Magma doesn't appear to affect saguaro trees unless you pour it directly on top of it, and even then the base of the tree might not be affected. Even if you could coax a dragon to breathe fire on command, it wouldn't do anything because you need sustained heat to burn a tree, something that normally only happens because of the abundance of grass and other flammable objects.
Just cutting them down is probably the most viable solution. If you can spare the gear, equip your woodcutters with metal headgear, as falling logs can be really nasty.

If they aren't causing birds to explode midlfight they're lagging forts to death and braining anyone who dares chop them down. Trees have become a real menace. It was inevitable.

[PatrikLundell]

It's taken me quite a few years for trees to grow back in sparsely wooded areas, but I've had them eventually block my trade entrance despite it being protected by a paved road around it (Ended up with a paved road all the way to the edge).

In your case, I'd pave most or all of the map, or, alternatively, set the dwarven engineering corps to remove all soil from the map (a.k.a. strip mining).
The next time, you might want to embark in badlands or in mountains. My understanding is that there is no regrowth of anything in mountains (ruling out outdoor farming), while badlands support growth (including trees) only where the top level of soil is removed (and the layer below is soil as well).

[Loci]

Is there any way to prevent trees from growing at all on the map? Besides flooding the world with magma?

Here's an improved region-pops script for dfhack:

Spoiler (click to show/hide)

Code: [Select]

-- Shows populations of animals in the region, and allows tweaking them.

local utils = require 'utils'

local FORCE = false

local function sort_keys(tab)
    local kt = {}
    for k,v in pairs(tab) do table.insert(kt,k) end
    table.sort(kt)
    return ipairs(kt)
end

local is_plant_map = {
    Animal = false, Vermin = false, VerminInnumerable = false,
    ColonyInsect = false, Tree = true, Grass = true, Bush = true
}

function enum_populations()
    local stat_table = {
        plants = {},
        creatures = {},
        any = {}
    }

    for i,v in ipairs(df.global.world.populations) do
        local typeid = df.world_population_type[v.type]
        local is_plant = is_plant_map[typeid]
        local id, obj, otable, idtoken

        if is_plant then
            id = v.plant
            obj = df.plant_raw.find(id)
            otable = stat_table.plants
            idtoken = obj.id
        else
            id = v.race
            obj = df.creature_raw.find(id)
            otable = stat_table.creatures
            idtoken = obj.creature_id
        end

        local entry = otable[idtoken]
        if not entry then
            entry = {
                obj = obj, token = idtoken, id = id, records = {},
                count = 0, known_count = 0,
                known = false, infinite = false
            }
            otable[idtoken] = entry
            stat_table.any[idtoken] = entry
        end

        table.insert(entry.records, v)
        entry.known = entry.known or v.flags.discovered

entry.count = entry.count + v.quantity
        if v.flags.discovered then
            entry.known_count = entry.known_count + v.quantity
        end

        if v.quantity > 10000000 then
            entry.infinite = true
        end
    end

    return stat_table
end

function list_poptable(entries, all, pattern)
    for _,k in sort_keys(entries) do
        local entry = entries[k]
        if (all or entry.known) and (not pattern or string.match(k,pattern)) then
            local count = entry.known_count
            if all then
                count = entry.count
            end
            if entry.infinite then
                count = 'innumerable'
            end
            print(string.format('%-40s %s', entry.token, count))
        end
    end
end

function list_populations(stat_table, all, pattern)
    print('Plants:')
    list_poptable(stat_table.plants, true, pattern)
    print('\nCreatures and vermin:')
    list_poptable(stat_table.creatures, all, pattern)
end


function boost_population(entry, factor, boost_count)
    for _,v in ipairs(entry.records) do
        if v.quantity < 10000001 or FORCE then
            boost_count = boost_count + 1
            v.quantity = math.floor(v.quantity * factor)
        end
    end
    return boost_count
end

function incr_population(entry, amount, incr_count)
    for _,v in ipairs(entry.records) do
        if v.quantity < 10000001 or FORCE then
            incr_count = incr_count + 1
            v.quantity = math.max(0, v.quantity + amount)
        end
    end
    return incr_count
end

function set_population(entry, amount, set_count)
    for _,v in ipairs(entry.records) do
        if v.quantity < 10000001 or FORCE then
            set_count = set_count + 1
            v.quantity = amount
        end
    end
    return set_count
end

local args = {...}
local pops = enum_populations()

if args[4] == 'FORCE' then
FORCE = true
end

if args[1] == 'list' or args[1] == 'list-all' then
    list_populations(pops, args[1] == 'list-all', args[2])
elseif args[1] == 'boost' or args[1] == 'boost-all' then
    local factor = tonumber(args[3])
    if not factor or factor < 0 then
        qerror('Invalid boost factor.')
    end

    local count = 0

    if args[1] == 'boost' then
        local entry = pops.any[args[2]] or qerror('Unknown population token.')
        count = boost_population(entry, factor, count)
    else
        for k,entry in pairs(pops.any) do
            if string.match(k, args[2]) then
                count = boost_population(entry, factor, count)
            end
        end
    end

    print('Boosted '..count..' populations.')
elseif args[1] == 'incr' or args[1] == 'incr-all' then
    local amount = tonumber(args[3])
    if not amount then
        qerror('Invalid increase amount.')
    end

    local count = 0

    if args[1] == 'incr' then
        local entry = pops.any[args[2]] or qerror('Unknown population token.')
        count = incr_population(entry, amount, count)
    else
        for k,entry in pairs(pops.any) do
            if string.match(k, args[2]) then
                count = incr_population(entry, amount, count)
            end
        end
    end

    print('Increased '..count..' populations.')
elseif args[1] == 'set' or args[1] == 'set-all' then
    local amount = tonumber(args[3])
    if not amount then
        qerror('Invalid set amount.')
    end

    local count = 0

    if args[1] == 'set' then
        local entry = pops.any[args[2]] or qerror('Unknown population token.')
        count = set_population(entry, amount, count)
    else
        for k,entry in pairs(pops.any) do
            if string.match(k, args[2]) then
                count = set_population(entry, amount, count)
            end
        end
    end

    print('Set '..count..' populations.')

else
    print([[
Usage:
  region-pops list [pattern]
    Lists encountered populations of the region, optionally restricted by pattern.
  region-pops list-all [pattern]
    Lists all populations of the region, optionally restricted by pattern.
  region-pops boost <TOKEN> <factor>
    Multiply all populations of TOKEN by factor.
    If the factor is greater than one, increases the
    population, otherwise decreases it.
  region-pops boost-all <pattern> <factor>
    Same as above, but boost all populations matching pattern.
  region-pops incr <TOKEN> <amount>
    Increase (or diminish) all populations of TOKEN by amount (additive).
  region-pops incr-all <pattern> <amount>
    Same as above, but increase all populations matching pattern.
  region-pops set <TOKEN> <amount>
    Set all populations of TOKEN to amount.
  region-pops set-all <pattern> <amount>
    Same as above, but set all populations matching pattern.

  Adding 'FORCE' at the end of the command will allow changing
    "innumerable" populations as well (experimental) 
]])
end


To use it, install dfhack (if you don't have it already), copy the code, paste it over the code in "hack/scripts/region-pops.lua" in your Dwarf Fortress directory, then run "region-pops set SAGUARO 0 FORCE" in the dfhack console. Make sure you keep a backup copy of your save because there is some possibility for flakiness. I tested it for several seasons and the game didn't crash, but I'm not sure that setting the region population to zero actually prevents new trees from growing (it doesn't affect already growing trees). But, at least in theory, this should eliminate the elfish encroachment.

[Urist Sonuvagimli]

Thankyou for your suggestions. 5 Woodcutters culled 84 trees on the map, and fps went up by 10-20. DFhack's AUTOCHOP option helps great when dealing with green threat. Though I could swear it looks like for 1 tree cut another grows up immideately at random spot.

944 logs aquired through logging efforts should be enough to pave the entire map. Time for the megaproject has come!

[Blastbeard]

944 logs aquired through logging efforts should be enough to pave the entire map. Time for the megaproject has come!

Build a giant tree made of dead trees, with a hollow in the middle leading down into the magma sea. The elves will never know the difference. If the elves know the difference, throw them down the hollow into the magma until they don't know the difference.

[utunnels]

I think it should be report as a bug.
Even if it is a land with sparse trees, it will grew into a forest sooner or later.

[Brent Not Broken]

these lumbering FPS killers.

Nice!

[Sanctume]

I know I had to create a 3-tile road buffer to prevent tress from destroying my surface walls. 
I'd build roads, and level maybe an 11x11 area for trees to regrow or even set for gathering plants/fruits. 
If it's really a pain, then I'd use dfhack fastdwarf 1 1 and cut every tree, and build roads or floors out of logs.