SKNode convertPoint toNode & fromNode confusion?

Question

I am a little confused by how the SKNode methods convertPoint:fromNode: and convertPoint:ToNode: are working, I have looked at the doc

Answer 1

For simplicity: When comparing location of node B to node A (trying to find how far they are from each other)

var BInSameCoordinateSys = NodeA.parent!.convertPoint(NodeB.position, fromNode: NodeB.parent!)

Troubleshoot by adding a sprite at location if not working to help visualize the location:

let childToSeeLocation = SKShapeNode(CircleWithRadius:50)
childToSeeLocation.fillColor = UIColor.redColor
ParentofA.addChild(childToSeeLocation)