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08-19-2009, 12:26 PM #1
Bullet Drops
I started this thread over in the PR forums and it has helped me figure out how these things work. It was not quite how people have explained it to me.
This is not super helpful in lieu of some later posts explaining the PR physics.
This was referring to some preconceived notions about PR physics people had.
very helpful diagram
THIS. This made it click finally for me.
http://www.realitymod.com/forum/f10-...let-drops.html|TG-Irr| Dreadnought


If the radiance of a thousand suns were to burst at once into the sky, that would be like the splendor of the Mighty One --
I am become Death, the shatterer of Worlds.
-J. Robert Oppenheimer, lead scientist of Manhattan Project quoting Bhagavad Gita
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08-19-2009, 12:35 PM #2
Re: Bullet Drops
Actually the diagram is also wrong, the bullet actually goes in a straight path up to the 'zeroed' point then starts to drop.
Like so:Just because everyone does something does not mean that it is right to do.
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08-19-2009, 01:17 PM #3
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Re: Bullet Drops
nedlands is wrong. There is no drop until the zero range, afterwards they follow a parabolic curve as shown in Snooggum's diagram.
Grab an MG on an open map and start shooting, you can see where it starts to drop (300m)
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08-19-2009, 02:37 PM #4
Re: Bullet Drops
sigh back to square 1.
|TG-Irr| Dreadnought


If the radiance of a thousand suns were to burst at once into the sky, that would be like the splendor of the Mighty One --
I am become Death, the shatterer of Worlds.
-J. Robert Oppenheimer, lead scientist of Manhattan Project quoting Bhagavad Gita
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08-19-2009, 02:50 PM #5
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Re: Bullet Drops
Nedlands has been working on the ballistics for PR for years (literally.)
The tracers that you see in-game are considerably 'heavier' than the regular rounds that you fire (and cannot see their flight path.) They have a slower muzzle velocity, they decelerate faster and therefore drop faster. Deceleration of bullets occurs very strangely in BF2, leading to the perception that the bullets travel in a straight path, then drop to the ground.
There is *some* drop, as Nedland's diagram for the MP5 zeroed at 100m shows. The drop at 100m is <5cm, which is less than two inches for those of you who might be metric-illiterate. Two inches at 100m is unnoticeable, but as I already stated, it drops significantly after that.
I wouldn't be quick to call Nedlands incorrect if I haven't been spending hundreds of hours dicking around with vBF2 ballistics.
-REad
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08-19-2009, 02:59 PM #6
Re: Bullet Drops
Just because everyone does something does not mean that it is right to do.
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08-19-2009, 04:50 PM #7
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Re: Bullet Drops
REad, if we have ballistics in PR already, explain to me all the talk of adding them? Is the gravity reduced or something like that making it less noticable?
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08-19-2009, 05:00 PM #8
Re: Bullet Drops
From what i've read on the subject the ballistics we have in PR aren't realitistic and it will be ver hard to make them like that since tracer and ball rounds travel differently in BF2. Until it is figured out how to be done I think the compromise is a low bullet drop and make everything smaller so the racers aren't super misleading about where the rounds are.
The way the drop is now its barely noticeable to me and at over 300 meters deviation is more noticeable on anything other than a sniper rifle than the drop.|TG-69th|chrisweb89









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08-19-2009, 05:09 PM #9
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Re: Bullet Drops
We have vBF2 ballistics. Nedlands has been (and I quote myself here,) "dicking around," with realistic ballistics. As has been stated several times in this thread, and innumerable times on the PR forums, tracers behave differently than standard rounds, postponing the implementation of ballistics from PR.
So, here is where I explain the talk of adding them:
The current ballistics -- as demonstrated by both Nedlands & Snoogums drawings -- are not realistic, so there is desire for them to be more realistic.
Understand now?
-REad
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08-19-2009, 05:25 PM #10
Re: Bullet Drops
|TG-Irr| Dreadnought


If the radiance of a thousand suns were to burst at once into the sky, that would be like the splendor of the Mighty One --
I am become Death, the shatterer of Worlds.
-J. Robert Oppenheimer, lead scientist of Manhattan Project quoting Bhagavad Gita
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08-19-2009, 05:31 PM #11
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08-19-2009, 05:39 PM #12
Re: Bullet Drops
|TG-XV| Waldo_II
Violence doesn't solve anything.
Exceptions for: Slavery, dictatorship, communism, genocide, oppression, evil/racist/hateful regimes bent on world domination...
"If you take a step towards freedom, it'll take two steps towards you." - Tom Morello




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08-19-2009, 06:05 PM #13
Re: Bullet Drops
Realistic Ballistics aren't linear. I.E. go along a straight line then drop. I think.
the Arma2 website has the realistic ballistics diagram I think.
Basically, the place that you call something zeroed would be the place the sights were designed to hit on that mark. Remembering that the sights and muzzle aren't the same.
In CQC situations, 50m away for example, with a rifle like the M4 you might find that the bullet will hit a bit lower than the sight. I think.
The M4A1, I think that's the carbine version? Or is that just the complete name of the M4, idk. Correct me if necessary. I think it's meant to be effective to 400m. So that should mean that the bullet trajectory, I think that's what it's called, crosses the sight line at 400m on that arc diagram? So that means in RL ranges below that aren't pinpoint on the sight, like PR? I've just confused myself.|TG-69th|Berlancic2"Speed. Aggression. Surprise."



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08-19-2009, 07:45 PM #14
Re: Bullet Drops
Ah, I see, thanks.
I know a good bit about programming, just not about what is and isn't mod-able with BF2. It would be more complicated to produce bullets from one physics module then select other rounds to be tracers and come from a separate physics module. That is if you were starting from scratch. I figured modders had access to this and all it would mean to remove the difference would be to port everything through the same physics module. However, as was explained above, they don't.
To someone who did not know dev's don't have access, it looks like a simple case of removal of functionality and rerouting.|TG-Irr| Dreadnought


If the radiance of a thousand suns were to burst at once into the sky, that would be like the splendor of the Mighty One --
I am become Death, the shatterer of Worlds.
-J. Robert Oppenheimer, lead scientist of Manhattan Project quoting Bhagavad Gita
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08-19-2009, 08:03 PM #15
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