Update init.lua

init.lua

@@ -1,34 +1,37 @@
-randomizer = {}
+randomizer = {
+    -- distinguish between nodes that can be replaced and nodes that CAN replace something
+    -- some node drawtypes cause low fps (e.g. plantlikes)
+    can_be_replaced = {},
+    can_replace = {},
+}
 
 local id = minetest.get_content_id
 
-local function allowed_node(node, def)
-    local allowed =  node ~= "" and node ~= "air" and node ~= "ignore" and node ~= "unknown" 
-    and def and def.description and def.description ~= ""
-    and not string.match(node, "stair") and not string.match(node, "slab")
-    and not string.match(node, "fence") and not string.match(node, "bed")
-    and not string.match(node, "door") and def.light_source == 0
-    and def.groups.not_in_creative_inventory ~= 1
-    and node ~= "mcl_core:bedrock" and node ~= "default:water_source"
-    and node ~= "default:water_flowing" and node ~= "default:river_water_source"
-    and node ~= "default:river_water_flowing" and node ~= "default:lava_source"
-    and node ~= "default:lava_flowing" and node ~= "mcl_core:water_source"
-    and node ~= "mcl_core:water_flowing" and node ~= "mcl_core:lava_source"
-    and node ~= "mcl_core:lava_flowing" and node ~= "mcl_mobspawners:spawner"
+local function can_be_replaced(node, def)
+    local allowed = node ~= "mcl_core:bedrock" and node ~= "air" and node ~= "mcl_mobspawners:spawner"
+    and def.drawtype ~= "liquid" and def.drawtype ~= "flowingliquid"
+    return allowed
+end
+
+local function can_replace(node, def)
+    local allowed = def.drawtype == "normal" and def.groups.not_in_creative_inventory ~= 1
     return allowed
 end
 
 minetest.register_on_mods_loaded(function()
     for node, def in pairs(minetest.registered_nodes) do
-        if allowed_node(node, def) then
-            table.insert(randomizer, node)
+        if can_be_replaced(node, def) then
+            table.insert(randomizer.can_be_replaced, node)
+        end
+        if can_replace(node, def) then
+            table.insert(randomizer.can_replace, node)
         end
     end
-    for _, node in pairs(randomizer) do
+    for _, node in pairs(randomizer.can_be_replaced) do
         -- this is faster then check for all nodes in the randomizer list
         -- in a loop in the minetest.register_on_generated function
         minetest.override_item(node, {
-            randomizer = randomizer[math.random(#randomizer)]
+            randomizer = randomizer.can_replace[math.random(#randomizer.can_replace)]
         })
     end
 end)
@@ -37,8 +40,8 @@ local data = {}
 
 minetest.register_on_generated(function(minp, maxp, blockseed)
     local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
-    local area = VoxelArea:new{ MinEdge = emin, MaxEdge = emax }
-    vm:get_data(data)
+	local area = VoxelArea:new{ MinEdge = emin, MaxEdge = emax }
+	vm:get_data(data)
     local data = vm:get_data()
     for z = minp.z, maxp.z do
         for y = minp.y, maxp.y do