Ah, a shameBloodBane611 wrote:That would be pretty neat Masaq, but I'm not suer that it is possible. It is my understanding that the kits are classified together in such a way that this would be impossible. I'm still pretty low on the experience scale with the BF editor, but I'm pretty sure thats how it works.
Recoil: G3A3 compared to L85 or AK47
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Masaq
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"That's how it starts, Mas, with that warm happy feeling inside. Pretty soon you're rocking in the corner, a full grown dog addict, wondering where your next St Bernand is coming from..." - IAJTHOMAS
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Rico11b
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I think you are on the right path as well Db. You have put a lot into this and I for one really appreciate you trying so hard to get this right. We know it's still doesn't perfectly reflect realistic rifle accuracy, but it will be a lot closer to reality than it was in .613. Quite a bit closer to reality than before actually. I like what you've done with the recoil so far as well.[R-DEV]dbzao wrote:The values we defined in 0.7 were guesses based on projectile size using the 556 rifle as the starting point. We got very close to the values Jonny calculated. I think we are going the right path here.
Everyone be sure to give Db a pat on the back for working so hard to square this away.
Thanks dude
R
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Hail_831
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Primary recoil(not the largest)Jonny wrote:I dont really get what you mean.
Each L85 must have the same paramters, scoped or not its the same gun. But if you mean randomised recoil values for each spawn then I dont think that is possible. We can have it randomised between shots, but each rifle acts the same. This is not a good thing to do either, the rifles fire the same mass at the same velocity so why would the recoil be different. Also, it is a diferent rifle but it acts the same as your other that you just dropped, the sights should be off slightly but the recoil is exactly the same to you.
EDIT:
@ VipersGhost:
different guns shoot the same bullet at different velocities because of barrel length. Any model that fails to take this into account is not good enough. Neither is guessing by the size of the cartridge. Thanks for letting us know what your experience shooting the different rounds has shown you, though.
@ Sabre_tooth_tigger:
The damage is related to a power of m^2*V^3, so mass and velocity are taken into account, velocity is more important than mass and the values are in a suitable range for the engine to deal with. There is compelling evidence for this somewhere on the internet, that product gives a number which is related to the size of game it is suited to hunting so must be related to its deadliness. The only problem is that all the results are not in appropriate ranges for the engine, hence the power to get them around the 15-50 ish area for most weapons in game.
This primary recoil is noticeable, but not the main recoil that one feels. It seems like you are only factoring for conservation of momentum on the round where in fact there are two distinct recoils from a firearm. The first, primary recoil, which is the conserved momentum of the gun-bullet system. However, a larger secondary recoil comes slightly later, when the bullet leaves the muzzle: then the hot expanding gas behind the bullet shoots out of the muzzle, and the muzzle recoils further like a rocket. This is, again, conservation of momentum, but in this case is is the gas momentum out of the barrel that makes the secondary recoil.A Winchester .308 cartridge launches a bullet of mass 150 grains (1 grain = 64.8 mg) with a speed of 2820 ft/s (1 ft = 30.5 cm). In MKS units, then, pb = 8.4 kg m/s. This rifle has a weight of about 8 lbs, or a mass of mg = 3.8 kg. That means the recoil speed of the rifle will be
vg = - pb/mg = -2.2 m/s
Gun manufacturers make baffles that reduce the flow of gas out of the muzzle to help reduce secondary recoil. Primary recoil cannot be reduced, since it is simply associated with the forward momentum of the bullet. This muzzle design and dispersion of the gas is what gives the Barret 50cal the recoil close to that of a 12ga shotgun. Even tho the mass of the round and velocity of the projectile is much greater in the 50 cal bmg.
Last edited by Hail_831 on 2007-12-18 17:15, edited 1 time in total.

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Masaq
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What I was getting at was that instead of having a single weapon, say the L85, you would have the L85-1, L85-2, L85-3, etc. Each version would have slightly different recoil values. Each would then be assigned to a different kit in the GB kit setup, so that each kit setup would have a rifle that behaved ever so slightly differently. Obviously, each one appears to be an identical weapon, but with slightly different recoil values.Jonny wrote:I dont really get what you mean.
Each L85 must have the same paramters, scoped or not its the same gun. But if you mean randomised recoil values for each spawn then I dont think that is possible. We can have it randomised between shots, but each rifle acts the same. This is not a good thing to do either, the rifles fire the same mass at the same velocity so why would the recoil be different. Also, it is a diferent rifle but it acts the same as your other that you just dropped, the sights should be off slightly but the recoil is exactly the same to you.
I'm aware that yes, each weapon is an L85 and that yes, no matter which L85 *I* pick up, *I* will experience the recoil from the L85 the same. However, in in-game terms, recoil does slightly more than this; it's designed to add an element of skill above and beyond simply lining up the weapon just once and then emptying an entire magazine.
As you say, having slightly different recoil values between the weapons would more reflect the difference in sights between individual weapons, but it would also reflect/model slightly different recoil experiences between soldiers - *my* experience of the L85 as a rifleman will always be the same, but it will be slightly different for the guy with an L85 as a medic - reflecting the differences in how we experience recoil.
Of course, if I then pick up a medic kit I then experience recoil in the same way as my buddy with the medic kit, but you'd be able to model rifleman, medic, engineer, officer, light AT, crewman, anti-air and grenadier all slightly differently.
"That's how it starts, Mas, with that warm happy feeling inside. Pretty soon you're rocking in the corner, a full grown dog addict, wondering where your next St Bernand is coming from..." - IAJTHOMAS
"Did they say what he's angry about?" asked Annette Mitchell, 77, of the district, stranded after seeing a double feature of "Piranha 3D" and "The Last Exorcism." - Washington Post
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RoGuETrOoPeR
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Another factor you forgot to take into account is how much gas is used to re-**** the weapon, this has quite a reasonable sized effect on a weapons velocity. An example of this:Jonny wrote: different guns shoot the same bullet at different velocities because of barrel length
L85A1/2 mv = 940 m/s (some gas used to re-****)
L98A1 Cadet GP Rifle mv =960 m/s (all gases used to propel round)
& the only difference being that the L85 is a gas operated reloader & the L98 a single shot self cocking Army cadet force variant.

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Masaq
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So you don't make it less - recoil has (I think) something like 3 factors - the amount it pushes the gun up, the amount it pushes the gun left, and the amount it pushes the gun right, I believe?Hail_831 wrote:then people would play one class over the other because the recoil is less on "..." even if they have the same gun. Cool idea put people will not like it.
Add all three up, and you get a figure. Now, so long as each variant had the same total figure, you can alter them in any way you want.
Alternatively, use it to the team's advantage and encourage engineer and medics by tinkering relatively little with their recoil values
"That's how it starts, Mas, with that warm happy feeling inside. Pretty soon you're rocking in the corner, a full grown dog addict, wondering where your next St Bernand is coming from..." - IAJTHOMAS
"Did they say what he's angry about?" asked Annette Mitchell, 77, of the district, stranded after seeing a double feature of "Piranha 3D" and "The Last Exorcism." - Washington Post
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VipersGhost
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If you look at the chuckhawks formula they do take in muzzle velocity for their recoil model. And I wasn't guessing via the cartridge size obviously as I said "not that its a big deal..." but just used it to reinforce my point that there is a DRASTIC difference between a 5.56 and 7.62 NATO. Then I gave you my first hand experience with it being far more than double the recoil. Then we looked at some videos with it demonstrating more than double the recoil. The barrel rise, which is really all that matters in PR, is more than twice what it is for the 7.62 in the slow-mo video than what it is for the 5.56. Sure there will always be other factors at work here, but it still stands that the 7.62 rnd is much greater.Jonny wrote: different guns shoot the same bullet at different velocities because of barrel length. Any model that fails to take this into account is not good enough. Neither is guessing by the size of the cartridge. Thanks for letting us know what your experience shooting the different rounds has shown you, though.
Your first two formulas listed aren't bad, I think take the average of them is a good measure with the 7.62 having about 3x recoil of 5.56.
That recoil table posted isn't to far off either, I don't think you can just discount it so easily. I think it's fairly close as it comes from Reloading hand books mostly and IMO I've showed evidence that supports.
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$kelet0r
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Masaq
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Like I said: YES, I KNOW recoil is user-based and not weapon-based in real life, I'm talking about in-game. In-game, more-or-less accurate recoil and deviation values have led us to 0.613, where you can hornshot a unicorn at 400m.Jonny wrote:No, you dont, its the same as it was before.
The difference is between people, not the rifle.
Unfortunately this cant be implimented as recoil values are based off the rifle, not the person.
In that passage I was talking hyperthetically still.
"That's how it starts, Mas, with that warm happy feeling inside. Pretty soon you're rocking in the corner, a full grown dog addict, wondering where your next St Bernand is coming from..." - IAJTHOMAS
"Did they say what he's angry about?" asked Annette Mitchell, 77, of the district, stranded after seeing a double feature of "Piranha 3D" and "The Last Exorcism." - Washington Post
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Gyberg
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@ViperGhost - The clips posted dont say much about the recoil. There are two differnt persons holding the weapons to start with. To get an accurate picture you would have to strap the weapons into a bench. Only then would it be possible to get accurate measurements. Jonny is just giving us the recoil values (the actual force of the recoil) for the weapons not taking into account the user. This is probably as good as it gets! Furthermore the barrel of the Ak-47 is elevated above the stock which increases the percieved recoil but not the actual force.
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BloodBane611
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Teek
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I dont suppose the recoil values take into account factors pertaining to the guns them selfs. when the gun has sight relief stock (G3 and AK), it will pivot at the point where the stock meets gun. when it has a carry handle and strait back stock, the pivot point is further behind at the shoulder. The M16 also has Buffer springs inside the stock to absorb recoil. The aforemented factors are very important when considering the perceived recoil.
An AR10 (7.62 M16) http://www.youtube.com/watch?v=dSqII72-OxA
A G3 http://www.youtube.com/watch?v=SBDVmJN35T8
An AR10 (7.62 M16) http://www.youtube.com/watch?v=dSqII72-OxA
A G3 http://www.youtube.com/watch?v=SBDVmJN35T8
Last edited by Teek on 2007-12-19 00:09, edited 1 time in total.

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Hail_831
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