LuaScript

Simple Is Power, Call UE4 Function Via Runtime Refelection. note: add -FastLua to Visual Studio Command-Line, then F5, the static bind code will generated

about

some global function in FastLuaHelper.h; example:

GameInstance = Unreal.LuaGetGameInstance()
MyUIBPClass = Unreal.LuaLoadClass(GameInstance, "/Game/UI/DebugUI.DebugUI_C")
then call create widget instance and add to viewport

Unreal.LuaGetUnrealCDO() is used for getting Class Default Object instance, example:

KismetSystemLibrary = KismetSystemLibrary or Unreal.LuaGetUnrealCDO("KismetSystemLibrary")

KismetSystemLibrary:GetDisplayName(GameInstance)

for delegate:

 GameUIHandler = {} 
 
 function GameUIHandler:OnStartGame()
     print('StartGame')
 end
 
local MyBtn = MyUMGHelper:FindWidgetInUMG(DebugUIInstance, "TestBtn")
--param is: lua function, lua table[option]
MyBtn.OnClicked:Bind(GameUIHandler.OnStartGame, GameUIHandler)

for struct

KismetMathLibrary = KismetMathLibrary or Unreal.LuaGetUnrealCDO("KismetMathLibrary")
local TestVector = KismetMathLibrary:MakeVector(123, 444, 23)
  print(TestVector.Y)
  TestVector.Y = 41241
  print(TestVector.Y)
  
or:(not Hight Performance!, but useful when no c++ function:Make_SomeStruct())
local TestVec = Unreal.LuaNewStruct("Vector")

all Unreal.LuaXXX functions, see FastLuaHelper.h

Unreal.LuaGetGameInstance();
Unreal.LuaLoadObject();
Unreal.LuaLoadClass();
Unreal.LuaGetUnrealCDO();//get unreal class default object
Unreal.LuaNewObject();
Unreal.LuaNewStruct();
Unreal.LuaNewDelegate();
Unreal.RegisterTickFunction();

more document will be added... if I have time.