Initial commit

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+end_of_line  = lf
+indent_style = space
+indent_size  = 4
+
+insert_final_newline = true
+trim_trailing_whitespace = true

init.lua

@@ -0,0 +1,65 @@
+local math, ipairs, tostring
+    = math, ipairs, tostring
+
+local minetest, vector, include
+    = minetest, vector, include
+
+local function debug_tell(...)
+    local text = ""
+    for _, v in ipairs({...}) do text = text .. tostring(v) end
+    minetest.chat_send_all(text)
+end
+
+local AXIS_LOOKUP = {
+    vector.new( 0,  1,  0), -- +Y
+    vector.new( 0,  0,  1), -- +Z
+    vector.new( 0,  0, -1), -- -Z
+    vector.new( 1,  0,  0), -- +X
+    vector.new(-1,  0,  0), -- -X
+    vector.new( 0, -1,  0), -- -Y
+}
+
+local function unit_vector_to_axis_index(vec)
+    if     vec.y ==  1 then if vec.x == 0 and vec.z == 0 then return 1 end
+    elseif vec.z ==  1 then if vec.x == 0 and vec.y == 0 then return 2 end
+    elseif vec.z == -1 then if vec.x == 0 and vec.y == 0 then return 3 end
+    elseif vec.x ==  1 then if vec.y == 0 and vec.z == 0 then return 4 end
+    elseif vec.x == -1 then if vec.y == 0 and vec.z == 0 then return 5 end
+    elseif vec.y == -1 then if vec.x == 0 and vec.z == 0 then return 6 end
+    end
+    error("Not a unit vector")
+end
+
+local FACEDIR_LOOKUP = {}
+for up_index, up in ipairs(AXIS_LOOKUP) do
+    FACEDIR_LOOKUP[up_index] = {}
+    for rot = 0, 3 do
+        local facedir = (up_index - 1) * 4 + rot
+        local back = minetest.facedir_to_dir(facedir)
+        local back_index = unit_vector_to_axis_index(back)
+        FACEDIR_LOOKUP[up_index][back_index] = facedir
+    end
+end
+
+minetest.register_on_punchnode(function(pos, node, puncher, pointed_thing)
+    local def = minetest.registered_nodes[node.name]
+    if def.paramtype2 == "facedir" and pointed_thing.above and pointed_thing.under then
+        local facedir = node.param2
+        -- Vector that points away from the punched face.
+        local punched_face = vector.subtract(pointed_thing.above, pointed_thing.under)
+
+        local up   = AXIS_LOOKUP[1 + math.floor(facedir / 4)]
+        local back = minetest.facedir_to_dir(facedir)
+
+        up   = up:rotate_around_axis(punched_face, math.rad(-90)):round()
+        back = back:rotate_around_axis(punched_face, math.rad(-90)):round()
+
+        local up_index   = unit_vector_to_axis_index(up)
+        local back_index = unit_vector_to_axis_index(back)
+
+        facedir = FACEDIR_LOOKUP[up_index][back_index]
+        if facedir == nil then minetest.chat_send_all("Could not look up facedir") end
+        node.param2 = facedir
+        minetest.set_node(pos, node)
+    end
+end)

mod.conf

@@ -0,0 +1,5 @@
+name = nc_extended_rotating
+title = NodeCore Extended Rotating
+author = copygirl
+description = Improves rotating of doors and optics in NodeCore.
+depends = nc_api_all