Does RunString work without a LuaCode asset?

[bingqiao]

I'm trying to run a simple script using LuaMachine but it keeps crashing.

FLuaValue Result = LuaState->RunString(TEXT("print('LuaMachine initialized in SampleGameActor!')"), TEXT("SampleGameTest"));

RunString has two arguments. Does the second one have to be the name of a LuaCode asset?

Or am I doing something that's just not meant to work?

Thanks!

[rdeioris]

Hi, how you are creating the LuaState?

[bingqiao]

Thanks Roberto, I did suspect the initialization was not right.

void ASampleGameActor::BeginPlay()
{
	Super::BeginPlay();

	LuaState = NewObject<ULuaState>(this, ULuaState::StaticClass(), FName("SampleLuaState"));
    if (LuaState)
    {
        // Test Lua execution
        FString TestScript = TEXT("print('LuaMachine initialized in SampleGameActor!')");
        RunLuaScript(TestScript);
    }	
}

[rdeioris]

Yes, you cannot initialize states in that way. The first step is inheriting from ULuaState (it is an abstract class). If you want to create multiple states dinamically use the luau branch and follow the various provided unit tests: https://github.com/rdeioris/LuaMachine/tree/luau/Source/LuaMachineEditor/Private/Tests

Otherwise follow the classic path and just use the functiona library: https://github.com/rdeioris/LuaMachine/blob/master/Source/LuaMachine/Public/LuaBlueprintFunctionLibrary.h