Proof of bullet drop in the game

[Lizzle*47]

Re: Proof of bullet drop in the game

SupUnd, your forgetting about terminal velocity.

Things will accelerate at the same speed (two balls galileo dropped of leaning tower of pisa), but given enough time, the lighter object will eventually stop accelerating its falling speed, and level off, while the heaver object will keep accelerating longer untill it reaches its terminal velocity.

This wouldn't happen in a vacuum. Which he assumed the world of bf2 is. If you drop a feather and a lead ball in a vacuum together they both hit the ground at the same time. It's actually pretty cool to see.

And although this thread may be dorky, I have to put a good use to physics somewhere...Just to prove all those people who say "You'll never use it" wrong. hahahaha.

[F-1]

Re: Proof of bullet drop in the game

I was just calculating the time it would take for a bullet to fall from a height of 0.5m, with a horizontal speed of 0m/s. It takes 0.31 seconds. Because you said trying to shoot a person 5m away would take 5 seconds if the bullet had a horizontal speed of 1m/s, this was not true, so I was simply showing you how it could not be so. So whatever distance the bullet has to travel (once again assuming that in the world of bf2 Newton's laws still apply, which I don't think they explicitly do), it has to do it in less than 0.31 seconds. There is a formula for this:

d = v/t

(For all the non physics chaps: d is distance, v is velocity, and t is time)
= 1000/0.31

3.225km is the maximum distance it could travel, if shot paralell to the earth from a height of 0.5m.

You were trying to calculate the time for a bullet to hit the "ground" and I was calculating the time it takes to hot a "guy". Very different problems.
You are correct and I am correct. I said if the speed is 1m/s and the guy is 5m away then it takes 5sec to hit him IF YOU EVER HIT HIM. so obviously if the bullet hits the ground before hitting the target then it did not travel those 5m. You have to be on top of a building and basically drop the bullet on him to hit him. that is not the world of bf2!

In my calculations above I was assuming realistic numbers that were applied to the M95 rifle. so forget about that 1m/s thing because it is not realistic. I think the bullet drop in bf2 needs no proof anymore.

You are right! bf2 assumes vaccum so there is no air drag and terminal velocity is not something that exists in bf2 unless someone opens a game file and tells me otherwise. I remember in one of Scott Evan's interviews he said that they did not include air in the physics of bf2.

another thing that took my attentions is that he said that programming the heat seaking missles in bf2 was a challenge! I understand now why the AA are not that accurate in the game. in real life once you lock a target then it is dead! that is not the case in bf2 because obviously they could not program the physics well.

Are we still in a disagreement over this physics Lizzle? I do not see where we are disagreeing!

[Lizzle*47]

Re: Proof of bullet drop in the game

You were trying to calculate the time for a bullet to hit the "ground" and I was calculating the time it takes to hot a "guy". Very different problems.
You are correct and I am correct. I said if the speed is 1m/s and the guy is 5m away then it takes 5sec to hit him IF YOU EVER HIT HIM. so obviously if the bullet hits the ground before hitting the target then it did not travel those 5m. You have to be on top of a building and basically drop the bullet on him to hit him. that is not the world of bf2!

In my calculations above I was assuming realistic numbers that were applied to the M95 rifle. so forget about that 1m/s thing because it is not realistic. I think the bullet drop in bf2 needs no proof anymore.

You are right! bf2 assumes vaccum so there is no air drag and terminal velocity is not something that exists in bf2 unless someone opens a game file and tells me otherwise. I remember in one of Scott Evan's interviews he said that they did not include air in the physics of bf2.

another thing that took my attentions is that he said that programming the heat seaking missles in bf2 was a challenge! I understand now why the AA are not that accurate in the game. in real life once you lock a target then it is dead! that is not the case in bf2 because obviously they could not program the physics well.

Are we still in a disagreement over this physics Lizzle? I do not see where we are disagreeing!

No disagreement. Didn't read the "if you ever hit him" in the right context.

[solodude23]

Re: Proof of bullet drop in the game

Wow I though people were going to start flaming him from the beginning. I didn't know this many people didn't know bullet drop was in. It is even included in PRMM....

Edit: Oh I see...you mean already in Vanilla BF2.

[zezke]

Re: Proof of bullet drop in the game

Could be a combination of muzzle velocity and deviation...

[imported_Fig]

Re: Proof of bullet drop in the game

This wouldn't happen in a vacuum. Which he assumed the world of bf2 is. If you drop a feather and a lead ball in a vacuum together they both hit the ground at the same time. It's actually pretty cool to see.

And although this thread may be dorky, I have to put a good use to physics somewhere...Just to prove all those people who say "You'll never use it" wrong. hahahaha.

Crap, you're right. Testing PRMM gets you realism-minded, so... ya. whoops, sorry bout that supund.

[Thunderbolt]

Re: Proof of bullet drop in the game

At maximum height the vertical velocity = 0m/s.

v² = u² + 2as

where v is the final vertical velocity
u is the initial vertical velocity
a is the acceleration (-9.8m/s²)
s is the vertical displacement, which is what we are trying to find.

s = v² - u²/2a
= 0² - 1²/2 x -9.8
= 0.05m

OK, I'm starting to get it now, but where do you get 1^2 as the Initial Vert. Velocity? Is that in the .con files?

[Thunderbolt]

Re: Proof of bullet drop in the game

At maximum height the vertical velocity = 0m/s.

v² = u² + 2as

where v is the final vertical velocity
u is the initial vertical velocity
a is the acceleration (-9.8m/s²)
s is the vertical displacement, which is what we are trying to find.

s = v² - u²/2a
= 0² - 1²/2 x -9.8
= 0.05m

OK, I'm starting to get it now, but where do you get 1^2 as the Initial Vert. Velocity? Is that in the .con files?

[Slapidus]

Re: Proof of bullet drop in the game

So i guees just aim above the person head to hit them is that what your saying :laugh:

[Slapidus]

Re: Proof of bullet drop in the game

So i guees just aim above the person head to hit them is that what your saying :laugh:

[imported_Iridium]

Re: Proof of bullet drop in the game

So i guees just aim above the person head to hit them is that what your saying :laugh:

Not always. Something i noticed right from the start of the game (coming from the instant-hit no drop projectiles of CoD) was that at middle to shorter ranges, i would have to aim BELOW what i wanted to hit with the assault rifles. At first i thought the iron sights were somehow skewed, which, of course, they are, being zeroed for an apparently pretty good range.

this has been hinted at whenever bullet drop comes up as the mysterious phenomenon of "bullet rise." This name is entirely misleading, because the bullet never rises, it just hits higher than what they sights say at ranges shorter than the sights are set for. It might be worthwile finding exactly what range(s) the sights on the weapons are zeroed for, now that we have (in my mind) pretty conclusive proof that bullet drop exists.

Bottom line: with most guns you don't actually have to aim above what you're shooting at. Quite often, you'll need to aim lower.

As an aside, since i have never seen it discussed, i'd also like to bring up bullet ricochets. I have no screenshots or videos, but i have tested this a few times and i've found that with the right angles it isn't hard to get ricochet projectiles to kill something, though they do significantly less damage than direct fire. Just wondering how many players are aware of this feature, since we are discussing bullet dynamics.

[imported_Iridium]

Re: Proof of bullet drop in the game

So i guees just aim above the person head to hit them is that what your saying :laugh:

Not always. Something i noticed right from the start of the game (coming from the instant-hit no drop projectiles of CoD) was that at middle to shorter ranges, i would have to aim BELOW what i wanted to hit with the assault rifles. At first i thought the iron sights were somehow skewed, which, of course, they are, being zeroed for an apparently pretty good range.

this has been hinted at whenever bullet drop comes up as the mysterious phenomenon of "bullet rise." This name is entirely misleading, because the bullet never rises, it just hits higher than what they sights say at ranges shorter than the sights are set for. It might be worthwile finding exactly what range(s) the sights on the weapons are zeroed for, now that we have (in my mind) pretty conclusive proof that bullet drop exists.

Bottom line: with most guns you don't actually have to aim above what you're shooting at. Quite often, you'll need to aim lower.

As an aside, since i have never seen it discussed, i'd also like to bring up bullet ricochets. I have no screenshots or videos, but i have tested this a few times and i've found that with the right angles it isn't hard to get ricochet projectiles to kill something, though they do significantly less damage than direct fire. Just wondering how many players are aware of this feature, since we are discussing bullet dynamics.

[A9_Doom]

Re: Proof of bullet drop in the game

it seems that someone has proven there is bullet drop in the very first post of the last 6 pages of doubt.

for those who dont understand the physics in real life theres no need to be wowed by equations just go throw something at a target as hard as you can and keep throwing it until it hurts, the weaker you become the slower you will be throwing it and you will naturally throw it higher and higher to hit the same target. forget about the numbers.

this same test applies in game, just try it and see.

surely that is part of the fun of a game.

understand the game through experience, at the end of the day bullet drop or not you will need to practice shooting people and if you do this enough you will hit them time and time again whether you knew about bullet drop or not.

if however you play the game for 2 years and still cant hit anything at range then it is probly best you read SK's post that started it all.

[|D|-Char-ley_Killa]

Re: Proof of bullet drop in the game

k thx

[Sllutmonkey69]

Re: Proof of bullet drop in the game

This thread sucks. Everyone saying bullet drop exists and the bullet will drop xxx amount. Either there is no bullet drop or they definatly don't drop to the degree people are saying. None of the evidence here is good enough. Needs to be a movie with 10+ shots not one shot repeated. More evidence is needed.