added necessary files

README.md

@@ -1,2 +1,33 @@
 # panes_embedded
 Mod for MineTest. Want to place xpanes, but there's already an arc? Now you can.
+
+No textures included!
+
+xpanes as such are nice and can be used for many purposes.
+
+But have you ever used arcs, stairs, slabs or similar things and wondered how
+to get your glass pane into the place under the arc? You usually can't.
+With this mod you can. Its embedded glass pane sits *visually* inside another
+block (i.e. your arc), even *physically* seems to be at that place (you can
+run against it) - but is *stored* in the node in front of the glass pane
+(where you can't place anything else now - but what would you want to place
+in front of the window anyway?)
+
+There are some situations where xpanes may have the right texture for your
+purpose - but you don't want the glass pane to sit in the center of the
+block, but rather at its front/back - like a thin glass slab from the circular
+saw in moreblocks. For that purpose, the *unconnected* panes have been added.
+They behave just like thin glass slabs from the saw.
+
+Crafting:
+   xpanes glass pane -> unconnected pane -> embedded pane -> xpanes glass pane
+
+The two new pane types (embedded and unconnected) are added for each pane that
+has been added by/through xpanes (more precisely: for each node with the group
+"pane").
+
+If some xpanes panes don't show up, make sure that this mod here optionally
+depends on the mod that defines the desired panes.
+
+Note: The panes defined here do not automaticly connect to other blocks.
+They're just normal blocks in that regard.

depends.txt

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+xpanes?
+yl_xpanes?
+jonez?

init.lua

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+panes_embedded = {}
+
+panes_embedded.add_pane = function(name, def, orig_name)
+	-- xpanes defines *two* nodes per pane; we only need one here
+	if(minetest.registered_nodes[ "panes_embedded:" .. name .. "_embedded" ]) then
+		return false
+	end
+	-- this cannot register as a pane because auto-connecting would screw things up
+	local groups_without_pane = table.copy(def.groups)
+	groups_without_pane.pane = nil
+	-- when two textures take up the same place, it might get a bit messy;
+	-- thus: make the pane a tiny bit smaller
+	local no_flicker = 1/4096
+	minetest.register_node(":panes_embedded:" .. name .. "_embedded", {
+		description = "Embedded "..tostring(def.description),
+		drawtype = "nodebox",
+		paramtype = "light",
+		is_ground_content = false,
+		sunlight_propagates = true,
+		inventory_image = def.inventory_image,
+		wield_image = def.wield_image,
+		paramtype2 = "facedir",
+		tiles = def.tiles,
+--		change compared to xpanes: it is *not* a pane in the technical sense (relevant for abms)
+		groups = groups_without_pane,
+--		change compared to xpanes: drops itself
+--		drop = "xpanes:" .. name .. "_flat", -- no: drops itself
+		sounds = def.sounds,
+		use_texture_alpha = def.use_texture_alpha and "blend" or "clip",
+		-- this pane does not (visually) sit in the middle of the node it is placed (and stoerd) in
+		-- but in the node *behind* that one
+		node_box = {
+			type = "fixed",
+			fixed = {{-1/2+no_flicker, -1/2+no_flicker, -1/32+1, 1/2-no_flicker, 1/2-no_flicker, 1/32+1}},
+		},
+		selection_box = {
+			type = "fixed",
+			fixed = {{-1/2, -1/2, -8/32+0.5, 1/2, 1/2, 1.0}},
+		},
+--		change compared to xpanes: no connected sides - the pane visually sits elsewhere;
+--		                           behaving as a normal pane would be very problematic
+--		connect_sides = { "left", "right" },
+	})
+
+	-- lone-standing pane; more or less the same as above, but not moved to the node behind - only
+	-- to the edge of its own node (sometimes helpful for building something; those xpanes can be
+	-- terribly annoying when they decide to connect to chairs and the like)
+	no_flicker = 0
+	minetest.register_node(":panes_embedded:" .. name.."_unconnected", {
+		description = "Unconnected "..tostring(def.description),
+		drawtype = "nodebox",
+		paramtype = "light",
+		is_ground_content = false,
+		sunlight_propagates = true,
+		inventory_image = def.inventory_image,
+		wield_image = def.wield_image,
+		paramtype2 = "facedir",
+		tiles = def.tiles,
+--		change compared to xpanes: it is *not* a pane in the technical sense (relevant for abms)
+		groups = groups_without_pane,
+--		change compared to xpanes: drops itself
+--		drop = "xpanes:" .. name .. "_flat", -- no: drops itself
+		sounds = def.sounds,
+		use_texture_alpha = def.use_texture_alpha and "blend" or "clip",
+		node_box = {
+			type = "fixed",
+			fixed = {{-1/2, -1/2, 0.5, 1/2, 1/2, 0.5-2/32}},
+		},
+		selection_box = {
+			type = "fixed",
+			fixed = {{-1/2, -1/2, 0.5, 1/2, 1/2, 1/2-4/32}},
+		},
+--		change compared to xpanes: no connected sides - the pane visually sits elsewhere;
+--		                           behaving as a normal pane would be very problematic
+--		connect_sides = { "left", "right" },
+	})
+
+	-- craft chain: from xpane to the unconnected to the embedded one
+	minetest.register_craft({
+		output = "panes_embedded:" .. name.."_unconnected",
+		recipe = {
+			{orig_name},
+		}
+	})
+
+	minetest.register_craft({
+		output = "panes_embedded:" .. name .. "_embedded",
+		recipe = {
+			{"panes_embedded:" .. name.."_unconnected"},
+		}
+	})
+
+	minetest.register_craft({
+		output = orig_name,
+		recipe = {
+			{"panes_embedded:" .. name.."_embedded"},
+		}
+	})
+	-- embedded pane successfully created
+	return ture
+end
+
+for k, v in pairs(minetest.registered_nodes) do
+	if(minetest.get_item_group(k, "pane") > 0) then
+		local parts = string.split(k, ":")
+		panes_embedded.add_pane(parts[1].."_"..parts[2], v, k)
+	end
+end

mod.conf

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+name = panes_embedded
+description = Place glass panes into arcs, slabs and other nodes.
+optional_depends = xpanes, yl_xpanes, jonez
+author = Sokomine
+title = Panes embedded in other nodes