The long thin line was a prototype navigation vector to a star to see how it would look. I think bugs on the pitch/roll ladders would look better, so it might disappear.
On the HUD, the best plan so far is to set the North East Down (NED) coordinate system when you select a destination planet.
- North Axis is aligned with the planet, East axis is aligned with planet equator (I'll cheat and not move the planets except in self rotation)
- Now with zero pitch and roll, and North compass heading, you approach the planet, with the north pole uppermost.
Now as we close in, we need to blend over to local level. If we keep heading striaght for the planet, this could look a bit weird, as pitch would gradually rotate by 90. However if we fly to maintain zero pitch, the flight trajectory would blend into an orbital trajectory. A possible answer is to have separate graphics for space and terrestrial navigation and display both for a transition period. Still thinking.
Some pictures of space mode and terrestrial mode - but how to transition?