protected void Create()
        {
            modelMeshes = EngineContent.GetModelByName(file);
            float mayor = -1;
            int   index = 0;

            //calculates the mesh index with the bigger bounding sphere radius
            foreach (var item in modelMeshes.Meshes)
            {
                if (item.BoundingSphere.Radius > mayor)
                {
                    meshIndexforSelection = index;
                    mayor = item.BoundingSphere.Radius;
                }
                index++;
            }
        }