mods that hopefully work for a TechAge-based pack

mods/techage_modpack/techage/lamps/lightblock.lua

@@ -0,0 +1,65 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2020 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+	TA4 Invisible Light Block
+
+]]--
+
+local S = techage.S
+
+-- 9 light positions in a 3x3 field
+local Positions = {
+	{x =-1, y = 0, z = 0},
+	{x = 0, y = 0, z =-1},
+	{x = 1, y = 0, z = 0},
+	{x = 0, y = 0, z = 1},
+	{x =-1, y = 0, z =-1},
+	{x = 1, y = 0, z = 1},
+	{x =-1, y = 0, z = 1},
+	{x = 1, y = 0, z =-1},
+}
+
+minetest.register_node("techage:lightblock", {
+	description = "Techage Light Block",
+	drawtype = "airlike",
+	paramtype = "light",
+	light_source = minetest.LIGHT_MAX,
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	floodable = true,
+	is_ground_content = false,
+	groups = {not_in_creative_inventory=1},
+	drop = "",
+})
+
+function techage.light_ring(center_pos, on, large)
+	if on then
+		for _,dir in ipairs(Positions) do
+			if large then
+				dir = vector.multiply(dir, 2)
+			end
+			local pos1 = vector.add(center_pos, dir)
+			local node = techage.get_node_lvm(pos1)
+			if node.name == "air" then
+				minetest.set_node(pos1, {name = "techage:lightblock"})
+			end
+		end
+	else
+		local pos1 = {x=center_pos.x-2, y=center_pos.y-2, z=center_pos.z-2}
+		local pos2 = {x=center_pos.x+2, y=center_pos.y+2, z=center_pos.z+2}
+		for _,pos in ipairs(minetest.find_nodes_in_area(pos1, pos2, "techage:lightblock")) do
+			minetest.remove_node(pos)
+		end
+		minetest.fix_light(pos1, pos2)
+	end
+end