Accessing Locator Nodes
Getting a list of all locator nodes is performed by simply
using ls as per usual. Normally there is only one thing you
really need to know about a locator node, and that is what it's
position in space is.
Bizarrely, you can think of a locator node as being a geometry
object with a single point. The value of this point is given
by the localPosition attribute of locator.
This is then transformed into the correct location using the
parent transform. This is not fun :( We have to transform the
position by the matrix of the locator nodes transform.