Originally Posted by gigafunk
As the bullet goes farther, it slows. It still falls at the same rate, but since the bullet is going slower(velocity reduced), it drops more with less foward distance covered. So really, the drop doesnt get more drastic, the distance the bullet travels gets less drastic compared to the drop as it slows.
I dont know if I said it right, its hard to describe.
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You got it right.
Another thing alot of people don't think about is the fact that bullet rise and drop is in relation to a horizontal plane while adjusting for distance. No bullet actually rises above the level (axis) of the barrel, it only drops from there. The bullet drop in relation to the barrel is almost instant, but (as you said) seems more drastic over long distance. Not because the bullet drops faster, but because the bullet is de-excellerating due to environmental factors, making the drop seem more vertical.
That is, for real guns (I don't consider myself a gun nut either, but I've done my fair share of shooting). I'm sure there are a lot of other things to take into consideration when making a viable and intuitive shooting system in a game.