replacement disabling option

place_tool.lua

@@ -48,8 +48,9 @@ minetest.register_tool("pick_and_place:place", {
             notify_change(pos1, pos2)
         else
             -- placement
+            local disable_replacements = controls.zoom
             local schematic = meta:get_string("schematic")
-            local success, msg = pick_and_place.deserialize(pos1, schematic)
+            local success, msg = pick_and_place.deserialize(pos1, schematic, disable_replacements)
             if not success then
                 minetest.chat_send_player(playername, "Placement error: " .. msg)
             else

readme.md

@@ -50,6 +50,8 @@ If you pick-and-place a replacement node the default node-placement is replaced
 * The `param2` value is preserved and rotateable
 * A "group" can be specified to place the same randomized slot across the whole group and placement
 
+**Note**: holding the "zoom" button on place disables the replacement engine
+
 # Portability
 
 The placement tool can be shared across worlds if the nodes are available there.

serialize.lua

@@ -54,7 +54,7 @@ function pick_and_place.serialize(pos1, pos2)
 end
 
 
-function pick_and_place.deserialize(pos1, encoded_data)
+function pick_and_place.deserialize(pos1, encoded_data, disable_replacements)
     local schematic, err = pick_and_place.decode_schematic(encoded_data)
     if err then
         return false, "Decode error: " .. err
@@ -77,7 +77,7 @@ function pick_and_place.deserialize(pos1, encoded_data)
         local i = area:index(x,y,z)
         local nodeid = schematic.node_id_data[j]
 
-        if nodeid == replacement_cid then
+        if nodeid == replacement_cid and not disable_replacements then
             -- replacement placement
             local abs_pos = {x=x, y=y, z=z}
             local rel_pos = vector.subtract(abs_pos, pos1)