New way to attach node: attached_node_facedir

GROUPS.md

@@ -48,6 +48,7 @@ Please read <http://minecraft.gamepedia.com/Breaking> to learn how digging times
 * `destroys_items=1`: If an item happens to be *inside* this node, the item will be destroyed
 * `no_eat_delay=1`: Only for foodstuffs. When eating this, all eating delays are ignored.
 * `can_eat_when_full=1`: Only for foodstuffs. This item can be eaten when the user has a full hunger bar
+* `attached_node_facedir=1`: Like `attached_node`, but for facedir nodes
 
 #### Footnotes
 

mods/CORE/mcl_attached/description.txt

@@ -0,0 +1 @@
+Adds additional ways for nodes to be attached.

mods/CORE/mcl_attached/init.lua

@@ -0,0 +1,24 @@
+local original_function = minetest.check_single_for_falling
+
+minetest.check_single_for_falling = function(pos)
+	local ret_o = original_function(pos)
+
+	local ret = false
+	local node = minetest.get_node(pos)
+	if minetest.get_item_group(node.name, "attached_node_facedir") ~= 0 then
+		local dir = minetest.facedir_to_dir(node.param2)
+		local cpos = vector.add(pos, dir)
+		local cnode = minetest.get_node(cpos)
+		if minetest.get_item_group(cnode.name, "solid") == 0 then
+			minetest.remove_node(pos)
+			local drops = minetest.get_node_drops(node.name, "")
+			for dr=1, #drops do
+				minetest.add_item(pos, drops[dr])
+			end
+			ret = true
+		end
+	end
+
+	return ret_o or ret
+end
+