It would be difficult/impossible from a gameplay point of view.
So we have your point A and B separated by a distance of 1AU(I believe this is what you’re trying to say). For the sake of simplicity Lets say our observer is the defense force that it “stationary” at B
a ship at A leaves instantaneously at .99999c heading towards B.
To go one AU it takes like 8 minutes at c, so according to the ship traveling it takes 8 minutes to reach point B. I’m actually ignoring length contraction here so now I’m secondguessing myself that this is the case. The space around the ship would appear to be moving .99999c so I suppose there would be length contraction.
.99999c gives us a gamma of 316. Gamma is the factor by which things are transformed in relativity.
For example, x’ = x/gamma where x’ is the new contracted distance and x is our old one.
So our 1AU becomes 150Gm/316 which is 50,000km. Moving at basically the speed of light gives us a travel time of about 1.6 seconds.
The interesting part is what happens when you calculate how long the defense force is waiting.
Here, t’ = tgamma where t’ is the time from the observer(our defense force). So our defensive force would wait 1.6316 which is conveniently 500 seconds or about 8.5 minutes.(This is about the time it takes for light to reach Earth from the Sun…which is really interesting coincidence
After checking my sanity and belief in the powers of physics this shouldn’t be that surprising.sidenote below)
Unfortunately, you can’t simulate this in a video game
How are you going to turn 1.5 seconds for the attackers into 9 minutes for the defenders? The devs, unfortunately, cannot control time. If they could, TQFE would be finished already because they could spend years working on it in what would seem like moments for us ;).
I’m pretty sure my maths/concepts were right but I wouldn’t mind a check @Kichae.
Sidenote: I’m not sure what I was expecting the time to be for the defenders and the fact that I got 8ish minutes really surprised me. I guess thinking about it it’s really not that surprising and I should have even expected it. It makes sense too sense gamma is transforming both the time of the traveler and how much dilation it experiences. We should always get 8ish minutes. What I found more unsettling was my initial thoughts that it should break as you get to higher fractions of c, but that’s when gamma comes in to correct both sides. This means that a photon traveling across the universe does it virtually instantaneously. They barely even exist in their reference frame and that’s pretty crazy. I did not expect to get that sort of revelation from this, thank you kamui. It’s something you sort of know, but don’t really think about it.