function israil(node)
	local testing = minetest.get_node_group(node, "rail")
	return testing
end
forward = {x=1,y=0,z=0}
backward = {x=-1,y=0,z=0}
left = {x=0,y=0,z=1}
right = {x=0,y=0,z=-1}
stop = {x=0,y=0,z=0}
function spawn_train(pos)
	local f = minetest.env:get_node({x=pos.x+1,y=pos.y,z=pos.z}).name
	local b = minetest.env:get_node({x=pos.x-1,y=pos.y,z=pos.z}).name
	local l = minetest.env:get_node({x=pos.x,y=pos.y,z=pos.z+1}).name
	local r = minetest.env:get_node({x=pos.x,y=pos.y,z=pos.z-1}).name
	print(dump(israil(f)))
	if israil(f) > 0 and israil(b) > 0 then
		--spawn train here
		forward_bogie = minetest.env:add_entity({x=pos.x+1,y=pos.y,z=pos.z}, "train:train")
		rear_bogie = minetest.env:add_entity({x=pos.x-1,y=pos.y,z=pos.z}, "train:train")
		forward_bogie:get_luaentity().lead = true
		forward_bogie:get_luaentity().other = rear_bogie
		rear_bogie:get_luaentity().other = forward_bogie
		return
	end
	if israil(l) > 0 and israil(r) > 0 then
		--spawn train here
		forward_bogie = minetest.env:add_entity({x=pos.x,y=pos.y,z=pos.z+1}, "train:train")
		rear_bogie = minetest.env:add_entity({x=pos.x,y=pos.y,z=pos.z-1}, "train:train")
		forward_bogie:get_luaentity().lead = true
		forward_bogie:get_luaentity().other = rear_bogie
		rear_bogie:get_luaentity().other = forward_bogie
		return
	end
end

function calculate_train_dir(self, pos)
	local in_front = minetest.env:get_node({x=pos.x+1,y=pos.y,z=pos.z}).name
	--forward
	if self.direction ~= backward and in_front == "default:rail" then
		self.direction = forward
		return
	end
	--backward
	local in_back = minetest.env:get_node({x=pos.x-1,y=pos.y,z=pos.z}).name
	if self.direction ~= forward and in_back == "default:rail" then
		self.direction = backward
		return
	end
	--left
	local on_left = minetest.env:get_node({x=pos.x,y=pos.y,z=pos.z+1}).name
	if self.direction ~= right and on_left == "default:rail" then
		self.direction = left
		return
	end
	--right
	local on_right = minetest.env:get_node({x=pos.x,y=pos.y,z=pos.z-1}).name
	if self.direction ~= left and on_right == "default:rail" then
		self.direction = right
		return
	end
end

minetest.register_node("train:train_spawner",{
	drawtype = "glasslike",
	description = "train spawner",
	groups = {snappy=1,choppy=2,oddly_breakable_by_hand=2,wood=1},
	tiles = {"spawnegg.png","spawnegg.png","spawnegg.png","spawnegg.png","spawnegg.png","spawnegg.png"},
	image = "default_stone",
	inventory_image = "default_stone",
	wield_image = "default_stone",
	selection_box = {
		type = "fixed",
		fixed = {0,0,0,0,0,0}
	},
	node_box = {
		type = "fixed",
		fixed = {  {0,0,0,0,0,0}, }
	},
	on_place = function(itemstack, placer, pointed)
		if pointed.type ~= "node" then
			return
		end
		if pointed.type == "node" then
			if minetest.env:get_node(pointed.under).name ~= "train:rail" then
				return
			end
		end
		spawn_train(pointed.under)
	end
})