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May 23, 2013, 2:03am

Hey, A Message Board :: Battlefield :: Hey, Den :: Recoil Recovery and Foregrips on the Semi-autos

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Topic: Recoil Recovery and Foregrips on the Semi-autos (Read 608 times)

turdferguson
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Recoil Recovery and Foregrips on the Semi-autos
« Thread Started on Jun 21, 2012, 11:14pm »

Hi everyone,

I was wondering if anyone had an understanding on the recovery from vertical recoil. Does decreasing vertical recoil also decrease the amount of time it takes to recover from vertical recoil? I can imagine two models that the game might use.

Model number one is that vertical recoil is recovered by a fixed amount per gun. So if you put a flash suppressor on, the kick from a single shot is recovered faster than if a heavy barrel were used, for example.

Model number two is that vertical recoil is recovered proportional to the vertical recoil. So, essentially, the higher the vertical recoil, the faster the recovery. Depending on how it is applied, all guns and/or all classes of guns and/or all attachments within a gun have the same recovery from recoil.

Specifically, I am looking at the best attachment combination(s) for the M39 EBR, which happens to be my favorite video game gun (starting with COD4). My idea is that putting on a foregrip reduces vertical recoil by 2/3, and that will reset the recoil faster in between shots. This takes some advantage of the faster RPM, although I realize the spread will not recover any faster. The major disadvantage with the foregrip is that you may as well hipfire instead of shoot while moving ADS.

Here are the stats: http://symthic.com/comparison.php?wep1=M....+EBR&attc2=None

While we are on that topic, the suppressor range exploit on semi-autos has now been abrogated. Flashlight and laser have limited use. I hate bipods, and they have little use on a semi-auto with iron sights anyway.

If recoil works as I hope, then I will use the foregrip on short range maps (maybe laser sight too). If not, then I will use the gun naked. Thanks for your help.

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mrite
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Re: Recoil Recovery and Foregrips on the Semi-auto
« Reply #1 on Jun 22, 2012, 5:07am »

The problem is that recoil recovery and spread recovery only happen after you have stopped firing, or in the case of the M39, after the next shot is ready to fire. In the case of the M39, it recovers recoil at a rate of 6 degrees per second, with upwards kick being 1.2 degrees. In this way, the grip, which offers a reduction to both horizontal and vertical recoil is the best attachment, and, as it only multiplies the miniscule spread, has a very small effect on the gun, unless you are strafing.

As an answer to your question about the recoil, yes, decreasing the values for recoil reduces the amount of time it takes to recover, as it recovers a fixed amount per second.

The best combination is probably your favorite sight, the foregrip to help controllability, and the laser, as it both reduces the amount of time to reach ADS accuracy, and it helps with hipfire.

« Last Edit: Jun 22, 2012, 5:08am by mrite »

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turdferguson
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Re: Recoil Recovery and Foregrips on the Semi-auto
« Reply #2 on Jun 22, 2012, 4:20pm »

Thanks for the help. I guess I still have some other questions.

So after firing my first shot, my recoil angle on the M39 is 0.8°, my spread added for that shot is 0.8°, and I have to wait 200 ms to fire my next shot. I recover 6° of recoil and 15° spread per second. After those 200 ms, it takes 133 ms for the recoil to reset and 53 ms for the spread to reset (simultaneously). Is that correct?

Also, how does a laser sight decrease time to ADS accuracy?

Anyone else use this gun and have advice for attachments?

Thanks.

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mrite
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Re: Recoil Recovery and Foregrips on the Semi-auto
« Reply #3 on Jun 22, 2012, 5:41pm »

Jun 22, 2012, 4:20pm, turdferguson wrote:

rather sadly, the recoil and spread only start to reset after the wait of 200 Ms is up, so in the time between shots, if you are firing at max speed, you recover no spread, nor recoil. The laser reduces time to full ADS accuracy, as in order to go ADS, your spread recover acts upon the difference between hipfire and ADS spread, and the hipfire spread is halved with the laser.

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didjeridu
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Re: Recoil Recovery and Foregrips on the Semi-auto
« Reply #4 on Jun 22, 2012, 8:08pm »

Nothing else to use besides the laser anyway. If I wanted a silencer on a semi-auto, it'd be the SKS or M417 at close range. Flashlight...are you serious? Besides, even if there wasn't the ADS thing, you can still slightly boost a lucky hipshot on bolt-actions, and turn the semi-autos into passable shotguns for those "oh doo-doo" moments.

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frankelstner
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Re: Recoil Recovery and Foregrips on the Semi-auto
« Reply #5 on Jul 5, 2012, 11:12am »

I had done some tests a long time ago about vertical recoil. I had the maximum vertical recoil on a really high value so I would do several 360° turns, and also used a very low recoil recovery. Then finally I put the recoil per shot to the maximum value and fired once to start things. After that I basically used a stopwatch to get the time whenever I turned 45°. In the end I had a nice test series. Trying to find the proper fit I ended up with this: http://i.imgur.com/Hd6qq.png

For some reason it appeared that the formula somehow only worked for very long times. I remember having had adjusted all values exactly so they would be in perfect equilibrium with the recoil increase and rate of fire, yet the gun would not behave as expected. Maybe there'd been an error in my equilibrium calculations. Anyway, I think that's when I stopped working with the game entirely. I do have some notes however which might be helpful:

RecoilAmplitudeMax: Maximum vertical recoil in degrees.

RecoilAmplitudeIncPerShot: Increase in vertical recoil per shot in degrees; multiplied by FirstShotRecoilMultiplier on the first shot of a burst of any length; the actual increase varies slightly between about 95% and 100% of the value.

RecoilAmplitudeDecreaseFactor: How fast horizontal recoil and vertical recoil are decreased. For large times this decrease scales with time^3 with time being the time in seconds that has passed since the last shot was fired. This time is remembered when switching stances. The following formula does not seem to work for short time periods. The factor 6 was obtained empirically.
Recoil decrease in degrees = 6 * RecoilAmplitudeDecreaseFactor * (time in seconds)^3 (* ShootingRecoilDecreaseScale)

ShootingRecoilDecreaseScale: An additional recoil decrease factor during ROF^-1. For example, if set to 0 the gun will recover from recoil only after ROF^-1.

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