A320 ND route calculations
Hello! I am planning on building a DIY A320 home cockpit and currently I'm thinking of
implementing EFIS (I don't want to use any existing parts from sim hardware vendors,
I'd like to build and code everything by myself. Will develop plugins for X-Plane etc)
So here's the question. Which types of shapes is ND capable of drawing between
waypoints? I mean, if we have a simple part of the flight plan, seems like we have to
use Great Circle formula (or we can omit the fact that the Earth is not flat for the ND
range?). In which cases there can be some circles or arcs around the waypoints?
Sometimes I see quite a rough bevel between two legs of the flight plan and sometimes
it's more of a circular turn around the waypoint (sometimes not even intersecting it).
Thank you in advance!