xlua - c#访问lua函数

lua代码

Assets/Lua/Test1.lua.txt

function IntParam(p)
    print("~~~~~ IntParam")
    print(type(p), p)
    print("~~~~~")
    return p
end

function Vec3Param(p)
    print("~~~~~ Vec3Param")
    print(type(p), p.x, p.y, p.z)
    print("~~~~~")
    return p
end

function EnumParam(p)
    print("~~~~~ EnumParam")
    print(type(p), p)
    print("~~~~~")
    return p
end

function ArrayParam(p)
    print("~~~~~ ArrayParam")
    print(type(p), p.Length)
    for i=0,p.Length-1 do
        print(i, p[i])
    end
    print("~~~~~")
    return p
end

function RefOutParam(p1, p2)
    print("~~~~~ RefOutParam")
    print(type(p1), p1, type(p2), p2)
    return 1, 2, 3
end

function MyStructParam(p)
    print("~~~~~ ArrayParam")
    print(type(p), p.str, p.value.i, p.value.f)
    print("~~~~~")
    return p
end

function ReturnTable()
    return { a = 1, b =2 }
end

1, 将lua函数映射为c#委托的方式

委托部分

[CSharpCallLua]
public delegate int IntParamDelegate(int p);

[CSharpCallLua]
public delegate int Vec3ParamDelegate(Vector3 p);

[CSharpCallLua]
public delegate int EnumParamDelegate(StringSplitOptions opts);

[CSharpCallLua]
public delegate Array ArrayParamDelegate(Array arr);

[CSharpCallLua]
public delegate int RefOutParamDelegate(ref int p1, out int p2);

[GCOptimize]
[LuaCallCSharp]
public struct MyStruct1
{
    public int i;
    public float f;
}

[GCOptimize]
[LuaCallCSharp]
public struct MyStruct2
{
    public MyStruct1 value;
    public string str;
}

[CSharpCallLua]
public delegate MyStruct2 MyStructParamDelegate(MyStruct2 p);

映射并调用代码

public class Test1 : MonoBehaviour
{
    private LuaEnv m_LuaEnv;

    private IntParamDelegate m_IntParamDelegate;
    private Vec3ParamDelegate m_Vec3ParamDelegate;
    private EnumParamDelegate m_EnumParamDelegate;
    private ArrayParamDelegate m_ArrayParamDelegate;
    private RefOutParamDelegate m_RefOutParamDelegate;
    private MyStructParamDelegate m_MyStructParamDelegate;

    public Func<int, int> m_IntParamFunc;

    void Start()
    {
        m_LuaEnv = new LuaEnv();
        m_LuaEnv.AddLoader((ref string filePath) =>
        {
            filePath = filePath.Replace('.', '/');
            filePath = $"Assets/{filePath}.lua.txt";
            var txtAsset = AssetDatabase.LoadAssetAtPath<TextAsset>(filePath);
            return Encoding.UTF8.GetBytes(txtAsset.text);
        });

        m_LuaEnv.DoString("require('Lua.Test1')");

        m_LuaEnv.Global.Get("IntParam", out m_IntParamDelegate);
        m_LuaEnv.Global.Get("IntParam", out m_IntParamFunc);
        m_LuaEnv.Global.Get("Vec3Param", out m_Vec3ParamDelegate);
        m_LuaEnv.Global.Get("EnumParam", out m_EnumParamDelegate);
        m_LuaEnv.Global.Get("ArrayParam", out m_ArrayParamDelegate);
        m_LuaEnv.Global.Get("RefOutParam", out m_RefOutParamDelegate);
        m_LuaEnv.Global.Get("MyStructParam", out m_MyStructParamDelegate);
    }

    void OnDestroy()
    {
        if (null != m_LuaEnv)
        {
            //必须先置为null, 否则Dispose报错
            m_IntParamDelegate = null;
            m_IntParamFunc = null;
            m_Vec3ParamDelegate = null;
            m_EnumParamDelegate = null;
            m_ArrayParamDelegate = null;
            m_RefOutParamDelegate = null;
            m_MyStructParamDelegate = null;
            m_LuaEnv.Dispose();
        }
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Alpha1))
        {
            m_IntParamDelegate(1);
            m_IntParamFunc(2);
            m_Vec3ParamDelegate(new Vector3(1, 2, 3));
            m_EnumParamDelegate(StringSplitOptions.RemoveEmptyEntries);
            m_ArrayParamDelegate(new int[] { 1, 2, 3 });
            int i1 = 0;
            m_RefOutParamDelegate(ref i1, out var i2); //lua中的第1个是本身返回值, 第2个为ref参数, 第3个为out参数
            Debug.Log($"i1:{i1}, i2:{i2}");

            var myStruct = new MyStruct2();
            myStruct.str = "hello";
            myStruct.value.i = 10;
            myStruct.value.f = 2.3f;
            m_MyStructParamDelegate(myStruct);
        }
    }

}

2, LuaFunction类方式

public class Test1 : MonoBehaviour
{
    private LuaEnv m_LuaEnv;

    public LuaFunction m_LuaFuncIntParam;
    public LuaFunction m_LuaFuncVec3Param;
    public LuaFunction m_LuaFuncArrayParam;
    public LuaFunction m_LuaFuncRefOutParam;
    public LuaFunction m_LuaFuncMyStructParam;

    void Start()
    {
        m_LuaEnv = new LuaEnv();
        m_LuaEnv.AddLoader((ref string filePath) =>
        {
            filePath = filePath.Replace('.', '/');
            filePath = $"Assets/{filePath}.lua.txt";
            var txtAsset = AssetDatabase.LoadAssetAtPath<TextAsset>(filePath);
            return Encoding.UTF8.GetBytes(txtAsset.text);
        });

        m_LuaEnv.DoString("require('Lua.Test1')");

        m_LuaEnv.Global.Get("IntParam", out m_LuaFuncIntParam);
        m_LuaEnv.Global.Get("Vec3Param", out m_LuaFuncVec3Param);
        m_LuaEnv.Global.Get("ArrayParam", out m_LuaFuncArrayParam);
        m_LuaEnv.Global.Get("RefOutParam", out m_LuaFuncRefOutParam);
        m_LuaEnv.Global.Get("MyStructParam", out m_LuaFuncMyStructParam);
    }

    void OnDestroy()
    {
        if (null != m_LuaEnv)
        {
            m_LuaEnv.Dispose();
        }
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Alpha1))
        {
            m_LuaFuncIntParam.Func<int, int>(3);
            m_LuaFuncVec3Param.Func<Vector3, Vector3>(new Vector3(5, 6, 7));
            m_LuaFuncArrayParam.Func<Array, Array>(new string[] { "a", "b", "c" });
            var results = m_LuaFuncRefOutParam.Call(0);
            foreach (var item in results)
            {
                Debug.Log($"{item.GetType().Name}:{item}");
            }

            var myStruct = new MyStruct2();
            myStruct.str = "hello";
            myStruct.value.i = 10;
            myStruct.value.f = 2.3f;
            m_LuaFuncMyStructParam.Func<MyStruct2, MyStruct2>(myStruct);

            var luaFunc = m_LuaEnv.Global.Get<LuaFunction>("ReturnTable");
            results = luaFunc.Call();
            foreach (var item in results)
            {
                Debug.Log($"{item.GetType().Name}:{item}");
            }
        }
    }

}

参考

xLua-C#访问lua中的全局function_fdelegate xlua-CSDN博客