[abenedik]

You can transform Position3D with using Transform method - for example:

Code:

var rotateTransform3D = new RotateTransform3D(new AxisAngleRotation3D(new Vector3D(0, 1, 0), 45));

var position = new Point3D(0, 0, 0);
var transformedPosition = rotateTransform3D.Transform(position);