Eject items when a node is placed at their current pos

mods/_misc/eject_entities.lua

@@ -0,0 +1,28 @@
+-------------------------------------
+-- Eject entities when placing node
+--
+
+unwalkable_nodes = {}
+
+minetest.after(0, function()
+	for itemname, node in pairs(minetest.registered_nodes) do
+		if node.walkable == false then
+			table.insert(unwalkable_nodes, 1, itemname)
+		end
+	end
+end)
+
+minetest.register_on_placenode(function(pos)
+	local objs = minetest.get_objects_inside_radius(pos, 1)
+	local minp, maxp = {x=pos.x-1, y=pos.y, z=pos.z-1}, {x=pos.x+1, y=pos.y+1, z=pos.z+1}
+	local nodes = minetest.find_nodes_in_area(minp, maxp, unwalkable_nodes)
+	if table.getn(nodes) == 0 then
+		return
+	end
+	for _,obj in pairs(objs) do
+		if not obj:is_player() and obj:get_entity_name() == "builtin:item" then
+			obj:setpos(nodes[math.random(1,#nodes)])
+		end
+	end
+end)
+

mods/_misc/init.lua

@@ -27,3 +27,6 @@ dofile(minetest.get_modpath("_misc").."/uncraft_woll.lua")
 
 -- List players
 dofile(minetest.get_modpath("_misc").."/list_players.lua")
+
+-- Eject entites when putting a node
+dofile(minetest.get_modpath("_misc").."/eject_entities.lua")