public static F3DEXTriangleWrapper GetTriangleWrapper(F3DEX_G_Tri1 triangle)
        {
            if (_triangleWrappers.ContainsKey(triangle))
                return _triangleWrappers[triangle];

            F3DEXTriangleWrapper wrapper = new F3DEXTriangleWrapper(triangle);
            _triangleWrappers.Add(triangle, wrapper);

            return wrapper;
        }
        public static F3DEXTriangleWrapper GetTriangleWrapper(F3DEX_G_Tri2 triangle, int index)
        {
            Dictionary<F3DEX_G_Tri2, F3DEXTriangleWrapper> wrappers;
            if (index % 2 == 1)
                wrappers = _triangle2FirstWrappers;
            else
                wrappers = _triangle2SecondWrappers;

            if (wrappers.ContainsKey(triangle))
                return wrappers[triangle];

            F3DEXTriangleWrapper wrapper = new F3DEXTriangleWrapper(triangle, index);
            wrappers.Add(triangle, wrapper);

            return wrapper;
        }