better hud

hud.lua

@@ -1,38 +1,80 @@
 
-function ham_radio.init_hud(player)
+function ham_radio.toggle_hud(player)
   local name = player:get_player_name()
-  ham_radio.playerhuds[name] = player:hud_add({
+  local item = player:get_wielded_item()
+  
+  -- remove hud if user does not wield a receiver
+  if item:get_name() ~= "ham_radio:receiver" then
+    if ham_radio.is_receiver_wielded[name] then
+	  player:hud_remove(ham_radio.playerhuds[name].background)
+      player:hud_remove(ham_radio.playerhuds[name].frequency)
+	  player:hud_remove(ham_radio.playerhuds[name].signal_meter)
+	  player:hud_remove(ham_radio.playerhuds[name].signal_level)
+      ham_radio.is_receiver_wielded[name] = false
+    end
+    return false
+  end
+
+  -- if hud is already enabled, pass
+  if ham_radio.is_receiver_wielded[name] then
+	return true
+  end
+
+  -- create hud
+  ham_radio.is_receiver_wielded[name] = true
+
+  local hud_pos = ham_radio.settings.hud_pos
+  
+  ham_radio.playerhuds[name] = {
+    background = player:hud_add({
+      hud_elem_type = "image",
+      position  = hud_pos,
+      offset    = { x = -250, y = 20 },
+      text      = "ham_radio_hud_bg.png",
+      scale     = { x = 2, y = 3 },
+      alignment = { x = 1, y = 0 },
+    }),
+    frequency = player:hud_add({
       hud_elem_type = "text",
       text = "",
-    position = ham_radio.settings.hud_pos,
+      position  = hud_pos,
-    offset = { x = ham_radio.settings.hud_offset.x, y = ham_radio.settings.hud_offset.y },
+      offset    = { x = 0, y = 0 },
-    alignment = ham_radio.settings.hud_alignment,
+      alignment = 0,
       number = 0xFFFFFF,
       scale= { x = 100, y = 20 },
+    }),
+	signal_meter = player:hud_add({
+      hud_elem_type = "image",
+      position  = hud_pos,
+      offset    = { x = -220, y = 30 },
+      text      = "ham_radio_hud_indicator_empty.png",
+      scale     = { x = 2, y = 2 },
+      alignment = { x = 1, y = 0 },
+    }),
+	signal_level = player:hud_add({
+	  hud_elem_type = "image",
+      position  = hud_pos,
+      offset    = { x = -220, y = 30 },
+      text      = "ham_radio_hud_indicator_full.png",
+      scale     = { x = 0, y = 2 },
+      alignment = { x = 1, y = 0 },
     })
+  }
+  return true
 end
 
 
 function ham_radio:update_hud_display(player)
-  local transmitter_signal = 0
 
-  local name = player:get_player_name()
+  if not ham_radio.toggle_hud(player) then
-  local item = player:get_wielded_item()
-
-  if item:get_name() ~= "ham_radio:receiver" then
-    if self.playerlocators[name] then
-      player:hud_change(self.playerhuds[name], "text", "")
-      self.playerlocators[name] = false
-    end
     return
   end
-  self.playerlocators[name] = true
 
-  local meta = item:get_meta()
+  local transmitter_signal = 0
+  local name = player:get_player_name()
+  local meta = player:get_wielded_item():get_meta()
   local frequency = meta:get_string("frequency")
   
-  minetest.chat_send_player(player:get_player_name(), "Configured freq:"..frequency)
-  
   if frequency ~= nil and frequency ~= "" then
     local transmitter = self.read_transmitter(frequency)
     -- minetest.chat_send_player(player:get_player_name(), "Found transmitter:"..minetest.serialize(transmitter))
@@ -45,15 +87,17 @@ function ham_radio:update_hud_display(player)
     --local indicator = string.rep('|', transmitter.distance)..string.rep('|', transmitter.signal)..string.rep(':', 25-(transmitter.distance + transmitter.signal))
   local indicator = string.rep('|', transmitter_signal)..string.rep(':', 20 - transmitter_signal)
 
-  local text = "[ Frequency: "..tostring(meta:get_string("frequency")).." ]"..indicator
+  --local text = "[ Frequency: "..tostring(meta:get_string("frequency")).." ]"..indicator
-
+  local text = "[ Frequency: "..tostring(meta:get_string("frequency")).." ]"
-  player:hud_change(self.playerhuds[name], "text", text)
+  player:hud_change(self.playerhuds[name].frequency, "text", text)
+  player:hud_change(self.playerhuds[name].signal_level, "scale", { x = (transmitter_signal * 20) / 200 or 0.1, y = 2 })
 end
 
-minetest.register_on_newplayer(ham_radio.init_hud)
+minetest.register_on_newplayer(ham_radio.toggle_hud)
-minetest.register_on_joinplayer(ham_radio.init_hud)
+minetest.register_on_joinplayer(ham_radio.toggle_hud)
 
 minetest.register_on_leaveplayer(function(player)
+  ham_radio.is_receiver_wielded[name] = false
   ham_radio.playerhuds[player:get_player_name()] = nil
 end)
 

init.lua

@@ -5,11 +5,9 @@ ham_radio = rawget(_G, "ham_radio") or {}
 
 ham_radio = {
   playerhuds = {},
-  playerlocators = {},
+  is_receiver_wielded = {},
   settings = {
-    hud_pos = { x = 0.45, y = 0.7 },
+    hud_pos = { x = 0.5, y = 0.8 },
-    hud_offset = { x = 15, y = 15 },
-    hud_alignment = { x = 1, y = 0 }
   }
 }