Further "tubing" improvements:

- ignore none inventory nodes (lamps,...)
- connect tubes for inventory nodes

tubelib/command.lua

@@ -203,12 +203,17 @@ end
 function tubelib.register_node(name, add_names, node_definition)
 	tubelib_NodeDef[name] = node_definition
 	-- store facedir table for all known node names
-	tubelib.KnownNodes[name] = true
 	Name2Name[name] = name
 	for _,n in ipairs(add_names) do
-		tubelib.KnownNodes[n] = true
 		Name2Name[n] = name
 	end
+	if node_definition.on_pull_item or node_definition.on_push_item or 
+			node_definition.is_pusher then
+		tubelib.KnownNodes[name] = true
+		for _,n in ipairs(add_names) do
+			tubelib.KnownNodes[n] = true
+		end
+	end
 end
 
 -------------------------------------------------------------------

tubelib/pusher.lua

@@ -226,6 +226,7 @@ tubelib.register_node("tubelib:pusher", {"tubelib:pusher_active"}, {
 	on_pull_item = nil,  		-- pusher has no inventory
 	on_push_item = nil,			-- pusher has no inventory
 	on_unpull_item = nil,		-- pusher has no inventory
+	is_pusher = true,           -- is a pulling/pushing node
 	
 	on_recv_message = function(pos, topic, payload)
 		local node = minetest.get_node(pos)

tubelib/tubes1.lua

@@ -141,13 +141,15 @@ function tubelib.get_next_tube(pos, dir)
 	return pos, nil
 end
 
-local function get_next_node(pos, dir)
-	pos = get_tube_pos(pos, dir)
-	local node = minetest.get_node_or_nil(pos) or tubelib.read_node_with_vm(pos)
-	if tubelib.KnownNodes[node.name] then
-		return node
+local function is_known_node(pos, dir)
+	if dir then
+		pos = get_tube_pos(pos, dir)
+		local node = minetest.get_node_or_nil(pos) or tubelib.read_node_with_vm(pos)
+		if tubelib.KnownNodes[node.name] and not tubelib.TubeNames[node.name] then
+			return true
+		end
 	end
-	return nil
+	return false
 end
 
 
@@ -204,7 +206,7 @@ local function is_connected(pos, dir)
 		local dir1,dir2 = get_tube_dirs(pos)
 		-- return true if connected
 		dir = Turn180Deg[dir]
-		return dir == dir1 or dir == dir2
+		return dir == dir1 or dir == dir2 
 	end
 	return false
 end
@@ -222,8 +224,8 @@ end
 local function update_next_tube(dir, pos)
 	-- test if tube is connected with neighbor tubes
 	local dir1, dir2 = get_tube_dirs(pos)
-	local conn1 = is_connected(pos, dir1)
-	local conn2 = is_connected(pos, dir2)
+	local conn1 = is_connected(pos, dir1) or is_known_node(pos, dir1)
+	local conn2 = is_connected(pos, dir2) or is_known_node(pos, dir2)
 	-- already connected or no tube arround?
 	if conn1 == conn2 then
 		return
@@ -246,12 +248,17 @@ local function update_tube(pos, dir)
 	for dir = 1,6 do
 		if not dir1 and is_connected(pos, dir) then
 			dir1 = dir
-		elseif not dir1 and get_next_node(pos, dir) then 
-			dir1 = dir
 		elseif not dir2 and is_connected(pos, dir) then
 			dir2 = dir
-		elseif not dir2 and get_next_node(pos, dir) then 
-			dir2 = dir
+		end
+	end
+	if not dir1 or not dir2 then
+		for dir = 1,6 do
+			if not dir1 and is_known_node(pos, dir) then 
+				dir1 = dir
+			elseif not dir2 and is_known_node(pos, dir) then 
+				dir2 = dir
+			end
 		end
 	end
 	dir1 = dir1 or dir 

tubelib_addons1/pusher_fast.lua

@@ -226,6 +226,7 @@ tubelib.register_node("tubelib_addons1:pusher_fast", {"tubelib_addons1:pusher_fa
 	on_pull_item = nil,  		-- pusher has no inventory
 	on_push_item = nil,			-- pusher has no inventory
 	on_unpull_item = nil,		-- pusher has no inventory
+	is_pusher = true,           -- is a pulling/pushing node
 	
 	on_recv_message = function(pos, topic, payload)
 		local node = minetest.get_node(pos)