Quote: "So, If you don't use a grid, I take it that you have your own collision system ( or something like NGDLL ) and you use that to see if units can go certain places, and to see where "buildings" can be placed etc...?"
Nope. No collision.
Units appear to "fly over" buildings when they are really hitting them, purely because their zdepth is turned off.
Sometimes I just use simple distance checking to determine whether a laser bullet has hit an enemy.
No pathfinding's needed because ships simply move in straight lines. Because the game is set in space the illusion of something flying over something else works.
Quote: "PS that's my last Q, cos otherwise I'll take over your thread."
No prob, ask away
Two strings walk into a bar. I'll have a pint says the first$%ASLDJ09920D"$"$D. Excuse my friend says the second, he isn't null terminated.