Other screwdriver mods, or mods that cause rotation, might operate without the screwdriver mod loaded and have `screwdriver.disallow` unavailable.
This allows nodes to default to full-disallow rather than full-rotation in such a situation.
* `new_param2` the new value of param2 that would have been set if on_rotate wasn't there
* return value: false to disallow rotation, nil to keep default behaviour, true to allow
it but to indicate that changed have already been made (so the screwdriver will wear out)
- * use `on_rotate = screwdriver.disallow` to always disallow rotation
+ * use `on_rotate = false` to always disallow rotation
* use `on_rotate = screwdriver.rotate_simple` to allow only face rotation
end
else
if not ndef or not ndef.paramtype2 == "facedir" or
+ ndef.on_rotate == false or
(ndef.drawtype == "nodebox" and
not ndef.node_box.type == "fixed") or
node.param2 == nil then