initial commit

init.lua

@@ -0,0 +1,43 @@
+local update_interval = 0.25
+local level_delta = 3
+
+for i=1, (14-level_delta) do
+	minetest.register_node("wielded_light:"..i, {
+		drawtype = "airlike",
+		groups = {not_in_creative_inventory = 1},
+		walkable = false,
+		paramtype = "light",
+		sunlight_propagates = true,
+		light_source = i,
+		pointable = false,
+		buildable_to = true,
+		drops = {},
+		on_timer = function(pos, elapsed)
+			minetest.swap_node(pos, {name = "air"})
+		end,
+	})
+end
+
+local timer = 0
+minetest.register_globalstep(function(dtime)
+	timer = timer + dtime;
+	if timer < update_interval then
+		return
+	end
+	timer = 0
+
+	for _, player in pairs(minetest.get_connected_players()) do
+		local wstack = player:get_wielded_item()
+		local light_level = wstack:get_definition().light_source
+		if light_level and light_level > level_delta then
+			local pos = vector.add({x = 0, y = 1, z = 0}, vector.round(player:getpos()))
+			local level = light_level-level_delta
+			local name = minetest.get_node(pos).name
+			if name == "air" and (minetest.get_node_light(pos) or 0) < level or -- New node
+					name:sub(1,13) == "wielded_light" then -- Update existing light node and timer
+				minetest.swap_node(pos, {name = "wielded_light:"..level})
+				minetest.get_node_timer(pos):start(update_interval*2)
+			end
+		end
+	end
+end)

mod.conf

@@ -0,0 +1 @@
+name = wielded_light