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74 lines
2.9 KiB
74 lines
2.9 KiB
1 year ago
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local minetest, nodecore
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= minetest, nodecore
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local registry = {}
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local registered_rotatables = {}
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-- Registered rotatable nodes will call this function when their `on_rightclick`
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-- is triggered instead of their default implementation. Can be overwritten.
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registry.custom_on_rightclick = function(pos, node, clicker, item_stack, pointed_thing) end
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local function register_rotatable(name, facedir_lookup)
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local def = 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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def.on_rightclick = function(...) registry.custom_on_rightclick(...) end
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registered_rotatables[name] = { lookup = facedir_lookup }
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end
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registry.register_rotatable = register_rotatable
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-- Returns whether the specified `node` is rotatable by this mod.
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local function is_rotatable(node)
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local name = node and node.name or ""
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return not not registered_rotatables[name]
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end
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registry.is_rotatable = is_rotatable
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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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local function 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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registry.fix_rotatable_facedir = fix_rotatable_facedir
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--------------------------------------------
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-- Register rotatable nodes from NodeCore --
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--------------------------------------------
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local function nodecore_filtered_lookup(eq_func)
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local lookup = {}
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for i = 0, 23 do
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local facedir = nodecore.facedirs[i]
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for j = 0, #lookup - 1 do
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local other = nodecore.facedirs[lookup[j]]
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if eq_func(facedir, other) then lookup[i] = j; break end
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end
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lookup[i] = lookup[i] or i
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end
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return lookup
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end
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local LENS_FILTERED_LOOKUP = nodecore_filtered_lookup(
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function(a, b) return vector.equals(a.f, b.f) end)
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local PRISM_FILTERED_LOOKUP = nodecore_filtered_lookup(
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function(a, b) return vector.equals(a.f, b.r) and vector.equals(a.r, b.f) end)
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local PANEL_FILTERED_LOOKUP = nodecore_filtered_lookup(
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function(a, b) return vector.equals(a.f, b.r) and vector.equals(a.r, b.f) end)
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for _, lens_state in ipairs({ "", "_on", "_glow", "_glow_start" }) do
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register_rotatable("nc_optics:lens" .. lens_state, LENS_FILTERED_LOOKUP) end
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for _, prism_state in ipairs({ "", "_on", "_gated" }) do
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register_rotatable("nc_optics:prism" .. prism_state, PRISM_FILTERED_LOOKUP) end
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register_rotatable("nc_doors:panel_plank" , PANEL_FILTERED_LOOKUP)
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register_rotatable("nc_doors:panel_cobble", PANEL_FILTERED_LOOKUP)
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return registry
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