private void ReadNodeTransform(Node node, XElement nodeElement)
        {
            Vector3 translate = nodeElement.Element(Ns + "translate").Value.ToVec3();
            node.Translation = Matrix.CreateTranslation(translate);

            Matrix rotation = Matrix.Identity;
            IEnumerable<XElement> rotations = nodeElement.Elements(Ns + "rotate");
            foreach (var rotationElement in rotations)
            {
                Vector3 rot = rotationElement.Value.ToVec3();
                float angle = rotationElement.Value.ToFloat(3);

                rotation = Transform.Rotate(angle, rot)*rotation;
            }
            node.Rotation = rotation;

            Vector3 scale = nodeElement.Element(Ns + "scale").Value.ToVec3();
            node.Scale = Matrix.CreateScale(scale);
        }
 private void ReadNodeInfo(Node node, XElement nodeElement)
 {
     node.Id = nodeElement.Attribute("id").Value;
     node.Name = nodeElement.Attribute("name").Value;
 }