Well see the thing is I just am assuming a relative straight line rather than orbital transfer.
I was also thinking in terms of everything moving all the time rather than calculating one section at a time to predict out... in which case the ship would just correct itself as it got closer if i set the planet as the target,
These ships would be fast enough to at least do that but not fast enough to make it so the planet moving would make no difference.
There's no place that really covers what I need. It tells you how NASA does it with our current technology but that's fairly useless if you aren't traveling in a circle or the orbit shape is almost a straight line.
Well, if you want to brute force it this should get you pretty darn close. Figure out how long it will take to get to the destination planet, based on the current desitination and origin. Then figure out how long it would take, and then calculate where the destination will be. Make this your course. Then, after some time, could be a percentage of course traveled, a tick, a certain amount of time, recalculate it. Figure out how long it will take to get to the planet from the current location of ship and planet and figure out where the planet will be at that time and make that the course. It won't be a straight line but it will get to you to your destination.