I''d be very careful with inertia, though. Seems to work fine for top down Asteroid-like games, and, to some extent, I-War, but if you want to see the worst way to do it go find a copy of Elite II or III. Ugh!!! It''s like fighting with lances on ice-skates (hey, an new game idea???
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You go flailing past your enemy often, and, of course, since they''re CPU''s they calculate approach vectors and velocity perfectly. The result? You die alot, and combat is NO FUN.
If you want to make such a demand on the player, it''s only fair that they get comp systems like NASA. But then the game devolves into sim of checking and reading systems.
For further corroboration, find a copy of Microsoft Space Simulator... It''s hell to get ANYWHERE when under realistic navigational constraints.
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Just waiting for the mothership...