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34 lines
1.1 KiB
34 lines
1.1 KiB
local minetest |
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= minetest |
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-- Table of nodes that can be rotated by the mod. |
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local registered_rotatables = {} |
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local registry = {} |
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function registry.register_rotatable(name, def, facedir_lookup) |
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def = def or minetest.registered_nodes[name] |
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if not def then error("Unknown node '" .. name .. "'") end |
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if def.paramtype2 ~= "facedir" then error("Node '" .. name .. "' must be 'facedir'") end |
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registered_rotatables[name] = { lookup = facedir_lookup } |
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end |
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-- Returns whether the specified `node` is rotatable by this mod. |
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function registry.is_rotatable(node) |
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return registered_rotatables[node.name] ~= nil |
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end |
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-- Fixes facedir for the specified `node` when rotated to `facedir`. |
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-- * Returns `nil` if the node can't rotate this way. |
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-- * Returns `facedir` when the node can rotate this way. |
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-- * Returns another facedir when the node should rotate another equivalent way. |
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function registry.fix_rotatable_facedir(node, facedir) |
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local name = node and node.name or "" |
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local entry = registered_rotatables[name] |
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if not entry then return nil end |
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if not entry.lookup then return facedir end |
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return entry.lookup[facedir] |
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end |
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return registry
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