Show inventory icon on player joining

init.lua

@@ -0,0 +1,45 @@
+inventory_icon = {}
+inventory_icon.hudids = {}
+
+function inventory_icon.get_inventory_state(player) 
+	local inv = player:get_inventory()
+	local size = inv:get_size("main")
+	local occupied = 0
+	for i=1,size do
+		local stack = inv:get_stack("main", i)
+		if not stack:is_empty() then
+			occupied = occupied + 1
+		end
+	end
+	return occupied, size
+end
+
+minetest.register_on_joinplayer(function(player)
+	local name = player:get_player_name()
+	inventory_icon.hudids[name] = {}
+	local occupied, size = inventory_icon.get_inventory_state(player)
+	local icon, color
+	if occupied >= size then
+		icon = "inventory_icon_backpack_full.png"
+		color = "0xFF0000"
+	else
+		icon = "inventory_icon_backpack_free.png"
+		color = "0xFFFFFF"
+	end
+	inventory_icon.hudids[name].icon = player:hud_add({
+		hud_elem_type = "image",
+		position = {x=1,y=1},
+		scale = {x=1,y=1},
+		offset = {x=-32,y=-32},
+		text = icon,
+	})
+	inventory_icon.hudids[name].icon = player:hud_add({
+		hud_elem_type = "text",
+		position = {x=1,y=1},
+		scale = {x=1,y=1},
+		offset = {x=-36,y=-20},
+		alignment = {x=0,y=0},
+		number = color,
+		text = string.format("%d/%d", occupied, size)
+	})
+end)