Nerve centrelines and image placement

[dbrnz]

• Get lots of images along the vagus nerve (just like there are lots of clustered markers when display nerves are enabled).
  • why doesn’t display nerves on/off show hide images (i.e. images should be treated the same as clustered markers).
  • are there nerve centrelines that don’t have cuffs? And vice-versa?
  • Should cuffs be ignored when showing markers/images on nerves? e.g. splanchnic nerve; pelvic splanchnic nerve.
  • Can we only have a single marker location for a centreline that’s made up of multiple connected annotated segments?
  • ‘centroid’ of a line-string is the mid-point (location = 0.5) not the centroid of some enveloping polygon.
• Should highlighting a nerve centreline also highlight its cuff? And vice-versa??
• Get feature type back in properties in a callback message? i.e. nerve cuff, anatomical feature, nerve centreline, neuron path, blood vessel, …??