-- removes "phantom" trees before they can explode.

--[====[

fix/exploding-trees

===================

By default, this script runs once a month by the Control Panel's Bug Fixes tab.

This script mitigates a longstanding Dwarf Fortress bug.

Once a year, trees check if they should grow. The exact day and time of this

growth is different for every tree.

Occasionally, when a tree is cut down or otherwise removed from the game, the

game engine doesn't remove the tree's data from the list of plants. The exact

details of this are not currently understood.

For some reason, these "phantom" trees will sometimes collapse during this

growth. This can stun, injure, or kill units which happen to be near this

collapse.

This script finds those trees and sets their dead flag, preventing them from

growing and collapsing.

--]====]

function suppress_phantom_exploding_trees()

for idx, tree in ipairs(df.global.world.plants.all) do

if not tree.damage_flags.dead

and tree.tree_info ~= nil

and (tree.type == df.plant_type.DRY_TREE

or tree.type == df.plant_type.WET_TREE)

then

local tt = dfhack.maps.getTileType(tree.pos)

local is_trunk = df.tiletype.attrs[tt].material == df.tiletype_material.TREE

if not is_trunk then

tree.damage_flags.dead = true

local announcement = string.format(

"DFHack %s: phantom tree %d at location (%d,%d,%d) suppressed.",

dfhack.current_script_name(), idx, tree.pos.x, tree.pos.y, tree.pos.z)

dfhack.printerr(announcement)

end

end

end

end

suppress_phantom_exploding_trees()