Navigation seems to be a strong point for people making AR apps. So here's a class to easily create a path in AR along a set of centre points.
Please feel free to use and contribute this library however you like. I only ask that you let me know when you're doing so, so I can see some cool uses of it!
It's as easy as this to make a path:
let pathNode = SCNPathNode(path: [
SCNVector3(0,-1,0),
SCNVector3(0,-1,-1),
SCNVector3(1,-1,-1)
])