Lua: Add example script

lua-api/examples/hello_world.lua

@@ -0,0 +1,95 @@
+print("Initializing hello_world.lua")
+
+local api = uevr.api;
+local uobjects = uevr.types.FUObjectArray.get()
+
+print("Printing first 5 UObjects")
+for i=0, 5 do
+    local uobject = uobjects:get_object(i)
+
+    if uobject ~= nil then
+        print(uobject:get_full_name())
+    end
+end
+
+local once = true
+local last_world = nil
+local last_level = nil
+
+uevr.sdk.callbacks.on_pre_engine_tick(function(engine, delta)
+    local game_engine_class = api:find_uobject("Class /Script/Engine.GameEngine")
+    local game_engine = UEVR_UObjectHook.get_first_object_by_class(game_engine_class)
+
+    local viewport = game_engine:get_property("GameViewport")
+    if viewport == nil then
+        print("Viewport is nil")
+        return
+    end
+    local world = viewport:get_property("World")
+
+    if world == nil then
+        print("World is nil")
+        return
+    end
+
+    if world ~= last_world then
+        print("World changed")
+    end
+
+    last_world = world
+
+    local level = world:get_property("PersistentLevel")
+
+    if level == nil then
+        print("Level is nil")
+        return
+    end
+
+    if level ~= last_level then
+        print("Level changed")
+        print("Level name: " .. level:get_full_name())
+    end
+
+    last_level = level
+
+    local game_instance = game_engine:get_property("GameInstance")
+
+    if game_instance == nil then
+        print("GameInstance is nil")
+        return
+    end
+
+    local local_players = game_instance:get_property("LocalPlayers")
+
+    for i in ipairs(local_players) do
+        local player = local_players[i]
+        local player_controller = player:get_property("PlayerController")
+        local pawn = player_controller:get_property("Pawn")
+
+        if pawn ~= nil then
+            print("Pawn: " .. pawn:get_full_name())
+        end
+
+        if player_controller ~= nil then
+            print("PlayerController: " .. player_controller:get_full_name())
+        end
+    end
+
+    print("Local players: " .. tostring(local_players))
+
+    if once then
+        print("executing stat fps")
+        uevr.api:execute_command("stat fps")
+        once = false
+
+        print("executing stat unit")
+        uevr.api:execute_command("stat unit")
+
+        print("GameEngine class: " .. game_engine_class:get_full_name())
+        print("GameEngine object: " .. game_engine:get_full_name())
+    end
+end)
+
+uevr.sdk.callbacks.on_script_reset(function()
+    print("Resetting hello_world.lua")
+end)