Implemented Cams, fixed invalid entity log spam

control.lua

@@ -20,6 +20,7 @@ require "tasklist"
 require "autodeconstruct"
 require "corpse_util"
 require "reactor_meltdown"
+require "screenshot"
 local Event = require "utils.event"
 
 local function player_joined(event)

reactor_meltdown.lua

@@ -111,6 +111,9 @@ local function on_tick()
 end
 
 local function entity_build(event)
+  if not event.created_entity.valid then
+    return
+  end
   if event.created_entity.name == "nuclear-reactor" then
     table.insert(global.reactors, event.created_entity)
   end

utils/utils.lua

@@ -496,39 +496,3 @@ function print_admins(msg)
 		end
 	end
 end
---[[ 
-function check_name(function_name)
-	for i,v in pairs(global.scenario.custom_functions) do
-		if v.name == function_name:lower() then
-			return i
-		end
-	end
-	return false
-end
-
-function add_global_event(event, func, name)
-	local p = game.player and game.player.print or print
-	if not event then p("Missing event parameter") return end
-	if not func then p("Missing function parameter") return end
-	if not name then p("Missing name parameter") return end
-	if check_name(name) then p("Function name \""..name.."\" already in use.") return end
-	table.insert(global.scenario.custom_functions, {event = event, name = name, func = func})
-	Event.add(event, func)
-end
-
-function remove_global_event(name)
-	local reg = check_name(name)
-	if reg then
-		Event.remove(global.scenario.custom_functions[reg].event, global.scenario.custom_functions[reg].func)
-		table.remove(global.scenario.custom_functions, reg)
-	else
-		game.print("Function with name \""..name.."\" not found")
-	end
-end
-
-Event.add(-2, function()
-	for i,v in pairs(global.scenario.custom_functions) do
-		Event.add(v.event, v.func)
-	end
-end)
- ]]