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init.lua

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+-- a tool to convert a mushroom biome into green forest with thick trees and flowers
+
+local S = rawget(_G, "intllib") and intllib.Getter() or function(s) return s end
+
+minetest.register_craftitem("antishroom:antishroom",{
+	description = "Mushroom biome converter",
+	inventory_image = "antishroom.png",
+	wield_image = "antishroom_wield.png",
+	on_use = function(itemstack, user, pointed_thing)
+	
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+		
+		local pos = pointed_thing.under
+		local target = minetest.get_node_or_nil(pos)
+		
+		if target and target.name == "ethereal:mushroom_dirt" then
+		
+			local start_pos = {
+				x = pos.x - 16,
+				z = pos.z - 16,
+				y = pos.y - 5 
+			} 
+			
+			local end_pos = {
+				x = pos.x + 16,
+				z = pos.z + 16,
+				y = pos.y + 15
+			} 
+
+			local rlist = {
+						["ethereal:mushroom_dirt"]  = "default:dirt_with_grass",
+						["ethereal:mushroom_trunk"] = "default:tree",
+						["ethereal:mushroom"]       = "default:leaves",
+						["ethereal:mushroom_pore"]  = "default:apple"
+					}
+					
+			local mlist = {}
+			for t,r in pairs(rlist) do
+				table.insert(mlist, t)
+			end
+			
+			local found_mushroom_parts = minetest.find_nodes_in_area(start_pos, end_pos, mlist)
+			for _, f in ipairs(found_mushroom_parts) do
+				local node = minetest.get_node(f)
+				
+				if not minetest.is_protected(f, user:get_player_name()) then
+					
+					minetest.swap_node(f, { name = rlist[node.name] } )
+					
+					if minetest.get_modpath("bonemeal") and node.name == "ethereal:mushroom_dirt" then
+						if math.random(1,5) > 4 then
+							bonemeal:on_use(f, 1, nil)
+						end
+					end
+				
+				end
+
+			end
+			
+			itemstack:take_item()
+			return itemstack
+		else
+			return itemstack
+		end
+		
+		
+	end,
+})

mod.conf

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+name = antishroom
+description = Convert Mushroom Biome to other
+depends = ethereal