Function BindUserData

source/userdata.cpp:678–724

// ***********************************************************************

void BindUserData(lua_State* L) {

	// register global functions
    const luaL_Reg globalFuncs[] = {
        { "userdata", NewUserData },
        { "vec", NewVec },
        { "quat", NewQuat },
        { NULL, NULL }
    };

    lua_pushvalue(L, LUA_GLOBALSINDEX);
    luaL_register(L, NULL, globalFuncs);
    lua_pop(L, 1);

	// new metatable
	luaL_newmetatable(L, "UserData");

	// register metamethods
    const luaL_Reg bufferMethods[] = {
        { "__index", Index },
        { "__newindex", NewIndex },
		{ "__tostring", ToString },
        { "__add", Add },
        { "__sub", Sub },
        { "__mul", Mul },
        { "__div", Div },
        { "set", Set },
        { "set2D", Set2D },
        { "get", Get },
        { "get2D", Get2D },
        { "width", Width },
        { "height", Height },
        { "size", Size },
        { "magnitude", VecMagnitude },
        { "distance", VecDistance },
        { "dot", VecDot },
        { NULL, NULL }
    };

	// TODO: some future functionality that might be useful:
	// Cross product
	// more fancy operations such as using strides, offsets, scalar against buffer etc
	// helpers for treating buffers as matrices, matmul functions, transpose, inverse etc

	luaL_register(L, NULL, bufferMethods);
    lua_pop(L, 1);
}