private SceneObject AddPrimitive(int meshType, string name)
        {
            SceneObject primitive = SceneObject.CreatePrimitive(meshType, name);

            primitive.Parent = onyx3DControl.Scene.Root;
            return(primitive);
        }
        // --------------------------------------------------------------------

        public static void AddPrimitive(int meshType, string name, bool select = true)
        {
            SceneObject primitive = SceneObject.CreatePrimitive(meshType, name);

            primitive.Parent = SceneManagement.ActiveScene.Root;
            if (select)
            {
                Selection.ActiveObject = primitive;
            }
        }