Proof of bullet drop in the game

[SK]

Re: Proof of bullet drop in the game

No, there is no more evidence needed. In Fact, everyone can check for themselves that there is bullet drop. All I did is eliminate the random deviation and stance modifiers, so I have the clean unmodified trajectory. The bullet dropped notably with this configuration, so there is bullet drop, period.
Depending on weapon and distance it might be small compared to the deviation cone, but it is there. Would be interesting to get some hard facts about how deviation works, then there could be some more answers about how important it is to consider bullet drop.

[evilzucchini]

Re: Proof of bullet drop in the game

Has someone already pointed out that distance (m) is velocity (m/s) TIMES time (s). . . not velocity/time?

[zacman13245]

Re: Proof of bullet drop in the game

I was under the impression that the horizontal and vertical components of the vectors could be treated as seperate, individual particles. ie. firing something from a height of 0.5m at a speed of 900m/s paralell to the ground will take the same amount of time to hit the ground as it would if it was fired at 1m/s.

Trying to shoot a bot 5 meters away with a bullet travelling at 1m/s will not take 5 seconds to hit him.

Say we are shooting from a height of 0.5m

s = ut + 0.5at²
*0.5 = 0t + 0.5 x 9.8t²
0.5 = 4.9t²
0.10 = t²
root0.10 = t
t = 0.31 seconds.

The bullet would hit the ground in 0.31 seconds.

Sorry, I just had to correct what I believe was a mistake in your assumptions.

I'm probably wrong, I mean I've only done senior high school physics, and you have a PhD.

id believe this

[imported_Wasp]

Re: Proof of bullet drop in the game

It took a while (I'm currently busy with school and a BF2 tournament) but here they are. 5 videos where i fire the M24 at a player to get server confirmed hits. The first two are at a range of about 300 meters in a fairly straight angle.

Directly at the player: http://media.putfile.com/BF2SL_01
Same range over the head: http://media.putfile.com/BF2SL_02

These 3 are at the maximum range of the M24 in an upward angle (about 330 meters).

Directly at the player: http://media.putfile.com/BF2H_01
Here I start at head level and move upwards: http://media.putfile.com/BF2H_02
Over the head: http://media.putfile.com/BF2H_03

My experiences with the M24 while testing like this is why I stick to firing AT the player. I currently have a 42% accuracy on the snipers (gone up from 34% in the last month).

[SK]

Re: Proof of bullet drop in the game

Interesting, that confirms what I´m saying. You´re aiming at the head in your "shooting at the player" videos, yet you don´t kill the guy instantly. This means the bullets drop and hits him below the head.
Bullet drop isn´t very noticable at distances <300m, so I think you´re aiming a bit too high at your first "aim high" video. You´re aiming about 2-3 heads high, should be more like 1 head or even less.
Once I know how to disable AI and I got free time (prolly sometime next week) I´ll do some more testing.

[imported_Wasp]

Re: Proof of bullet drop in the game

The first videos are at 300 according to the nearest base and the last one is the max of the m24 and I shot lower then what I did in the first series of shots and in an upward angle. In one video I move upwards from about the head height and if you can't fire at any length above the player then yes more distance is needed to prove bullet drop.

[hawke30]

Re: Proof of bullet drop in the game

I was banned by DrunkenPirate for spamming links to hack sites across the forum even after I was warned and asked to stop.

Please continue with the thread.

[SK]

Re: Proof of bullet drop in the game

Ok I now measured the drop at about 340 meters. Took the modified M24 (no recoil, no cone etc. ,just clean bullet drop and extreme Zoom), went to the crane at Gulf of Oman and fired from the position after climbing 2 ladders. AI is set to idle, so just stands around (Thanks to the guy who explained how to do that in the Tipps&Tricks forum). This is what I got: When I used the third horizontal line below the crosshair I´d get headshots every time (clearly visible with tracers added). This means that bullet drop @340m is about the distance between the top of a soldier´s helmet and his upper waist. I then tried using this information to score hits with the unmodified M24, it worked pretty well. I even scored some one shot kills (headshots), but getting the elevation right with normal zoom is kinda hard. Shooting without consideration of bullet drop also hits targets, but obviously mostly in the leg area. The random deviation makes it rather hard to give totally solid answers though, I might do some more testing later.

[GRyDLOCK]

Re: Proof of bullet drop in the game

GODDAMN! what a report

[Musou]

Re: Proof of bullet drop in the game

With an M16 you have about 140 meter view. How much does an M16 drop irl at that range? Insignificant! Why give the server the added workload?

If your M16 had a battlesight zero using the Improved BattleSight Zero method promoted by Lt Col Chuck Santose the bullet would actually be a little bit high at 140 meters and would be dropping down onto target with the sight plane at 200 meters.

Using the IBSZ method and milspec ammunition your rifle would be roughly on target at 50 YARDS and 200 METERS. Minor adjustments to obtain an actual zero at 200m would be insignificant at the closer distance.

The important thing to remember is that the bullet is always dropping relative to the sight plane, but because the bullet starts out below the sight plane it ends up crossing it twice, once on the way "up" and once on the way down.

More on the IBSZ here for people who actually care or who own an AR15/M16 type rifle: http://groups.msn.com/TheMarylandAR1...sightzero.msnw

Its a great battlesight method.

[Musou]

Re: Proof of bullet drop in the game

Interesting thread. Ive not played this game a great deal but taking shots across the face of Kubra Dam last night (approx 200 m) on prone targets I could only get hits on people by aiming a bit high before firing.

One thing that seems to be true is that the only thing modeled is bullet drop and the weapons arent modeled as zeroed in at any range. The bullet begins below the sight plane and isnt fired at an agle to cross it at two points as they are in reality.

This means that bullet drop is quite a bit more significant in game than it is in reality, because with most zero methods the bullet is only slightly above or below the sight plane at any practical distance, instead of being all low and getting greater and greater as the range increases.

[Pedro]

Re: Proof of bullet drop in the game

would this:

Ok I now measured the drop at about 340 meters.

and this:

if the target is 100m away then t=0.10sec and y= 0.05m
-if the target is 150m away then t=0.15sec and y= 0.11m
-if the target is 200m away then t=0.20sec and y= 0.20m
-if the target is 250m away then t=0.25sec and y= 0.31m
-if the target is 300m away then t=0.30sec and y= 0.44m
-if the target is 350m away then t=0.35sec and y= 0.60m
-if the target is 400m away then t=0.40sec and y= 0.78m
-if the target is 500m away then t=0.50sec and y= 1.23m
-if the target is 550m away then t=0.55sec and y= 1.48m
-if the target is 600m away then t=0.60sec and y= 1.76m

result in this:
1 horizontal line ~200m
2 horizontal line ~300m
3 horizontal line ~350m
4 horizontal line ~400m
???

According to some guy whos name escapes me the drop is 60cm at 340m, and judging by SK's pic that seems correct. So If three lines are 60cm, wouldn't one line be 20cm?

[SK]

Re: Proof of bullet drop in the game

Caution! :)

It would mean the lines of my modded M24 are equal to 20cm at ~350m.
But that´s the problem: I use a Zoom level 20 times higher (0.01) than the original zoom (0.2) for this test, so you can´t use this as a reference.
For this reason I used the height in relation to the soldier´s body as reference, cause this is a value invariant to zoom level changes.
Actually 60 cm from the table look perfectly right, which means that DICE indeed uses a gravity value of about 1g ~= 9,8 m/s^2 for their physics model (which is reasonable).

[Pedro]

Re: Proof of bullet drop in the game

Yeah I just reread the post and realised it was retarded. Forgot all about the zoom and stuff.

edit: Anway, it is proven that we do indeed have bulletdrop, but will knowing all this make you a better sniper? I'd say propably not. With draw distance at 100% you can (barely) see the silhouette of a soldier at 450m (try this yourself), and according to the awesome table above the bullet would fall, say ~1m... So to hit something 450m away you basically aim 50cm above the head, and hope that the bullet will hit the body. Hitting the head at 450m with deviation is, well, improbable.

[Sllutmonkey69]

Re: Proof of bullet drop in the game

An easy way to judge distance acuratly (I'm sure I posted this before). Is to be a squad leader and tell your squad to attack the possition. It will put up a range finder and a smoke flair now quit guessing ranges.