Connecting the C++ class with the LUA table -

i trying connect 3d engine lua (5.1) parser. example, have lua class of vec3 , have c++ class of vec3. want them work eachother.

this (part) of c++ class:

class vec3 { public:     vec3() {}     vec3(float _x, float _y, float _z) : x(_x), y(_y), z(_z) {}      vec3 operator+(const vec3 &b)     {         return vec3(x + b.x, y + b.y, z + b.z);     }     float dot(const vec3 &b)     {         return x * b.x + y * b.y + z * b.z;     }      float x, y, z; } 

this (limited) lua version:

vec3 = {}; vec3.__index = vec3; local mt = {} mt.__call = function(class_tbl, ...)     local obj = {}     setmetatable(obj, vec3);     vec3.init(obj, ...);     return obj; end vec3.init = function(obj, x, y, z)     obj.x, obj.y, obj.z = x, y, z; end setmetatable(vec3, mt);  function vec3:__tostring()     return "(" .. self.x .. ", " .. self.y .. ", " .. self.z .. ")"; end  function vec3:__add(b)     return vec3(self.x + b.x, self.y + b.y, self.z + b.z); end  function vec3:dot(b)     return self.x * b.x + self.y * b.y + self.z * b.z; end 

i think question quite obvious: want able use vec3's in c++ code, example position nodes or other stuff , want able make these available in lua lua-programmer can math vec3's , send them c++. want able construct vec3 in lua , send c++ understood vec3 class.

to achieve this, think need construct above lua table in c instead of in lua , need create function "push" , "pop" send them lua , retrieve them lua.

but trials fail.

can me work?

dirk.

why not try use c++ packages luabind or luabridge? in you can access lua data c++ , vice versa.