User:Fleeting Frames/cposchange

Save as cposchange.lua into /hack/scripts folder:

--[==[Waits for a cart to move (or return with flip) and pauses --]==]
local args = {...}
local cart = dfhack.gui.getSelectedItem()
local flip = false
if #args>0 and args[1]=="flip" then 
flip = true
else
flip = false
end
function rwait(nr,minecart, cx, cy, cz)
	dfhack.timeout(1, "ticks", 
	function()  
		if((minecart.pos.x == cx) and (minecart.pos.y == cy) and (minecart.pos.z == cz)) then 
			df.global.pause_state = true print("Minecart " .. minecart.vehicle_id .. " moved back into " .. cx .. " " .. cy .. " " .. cz .. " in " .. (df.global.cur_year_tick-nr) .. " steps.") 
		else rwait(nr, minecart, cx, cy, cz) end 
	end )
end 

function fwait(nr,minecart, cx, cy, cz)
	dfhack.timeout(1, "ticks", 
	function()  
		if((minecart.pos.x ~= cx) or (minecart.pos.y ~= cy) or (minecart.pos.z ~= cz)) then 
			rwait(nr, minecart, cx, cy, cz)
		else fwait(nr, minecart, cx, cy, cz) end 
	end )
end

function mwait(nr,minecart, cx, cy, cz)
	dfhack.timeout(1, "ticks", 
	function()  
		if((minecart.pos.x ~= cx) or (minecart.pos.y ~= cy) or (minecart.pos.z ~= cz)) then 
			df.global.pause_state = true print("Minecart " .. minecart.vehicle_id .. " moved in " .. (df.global.cur_year_tick-nr) .. " steps.") 
		else mwait(nr, minecart, cx, cy, cz) end 
	end )
end 

if flip then
fwait(df.global.cur_year_tick,cart, (cart.pos.x +1 -1), (cart.pos.y +1 -1), (cart.pos.z +1 -1))
else 
mwait(df.global.cur_year_tick,cart, (cart.pos.x +1 -1), (cart.pos.y +1 -1), (cart.pos.z +1 -1))
end