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Maniphest T68190

AH-9 and KA--60 gun fire rate is directly proportional to the framerate
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Description

When the client has a high framerate, the AH-9 and KA-60 have a decent fire rate.

When the client has a low framerate, the rate of fire of the AH-9's miniguns and the KA-60's gatling guns are much lower, making it hard to destroy targets. This is in both singleplayer and multiplayer.

NOTE: this is not a matter of "lower frames => I see fewer bullets because of the framerate." This literally entails the Little Bird firing as few as 600 rounds per minute, when it should be firing close to 4000 rpm. The framerate should not affect the rate of fire.

Details

Legacy ID
4139929830
Severity
None
Resolution
Open
Reproducibility
Always
Category
Gameplay
Steps To Reproduce

Put all settings to low and fly an AH-9 out to the ocean, so your framerate is silky smooth. Fire the minigun, and note how fast the bullets are being fired.

Then put all settings to high (especially object view distance) and fly the AH-9 over Agia Marina. Fire the minigun and compare that rate of fire to the previous one.

This can be done in singleplayer and multiplayer.

Additional Information

More than likely all helicopter guns suffer from this issue.

EDIT: Testing methodology -

Game version: Beta 0.71.106777 - development branch.

TEST 1: High framerate (55-60+ FPS: object distance set to 500, helicopter at "The Spartan")
Ammo Start = 5000
Ammo End = 3850
Duration = 30 seconds
Calculated Rate of Fire = 2500 rpm

TEST 2: Low Framerate (15-20 fps: Set everything to high/ultra, max view/object distance, helicopter in the middle of Agia Marina)
Ammo Start = 5000
Ammo End = 4592
Duration = 30 seconds
Calculated Rate of Fire = 816 rpm

REPEATED TESTS:
High Framerate: 2442 rpm
Low Framerate: 756 rpm

Please note: the time is measured using the IN-GAME watch alongside an IRL stopwatch. The in-game watch kept accurate time despite the differences in framerate.

Event Timeline

BruceyPoo edited Steps To Reproduce. (Show Details)Jun 22 2013, 1:10 AM
BruceyPoo edited Additional Information. (Show Details)
BruceyPoo set Category to Gameplay.
BruceyPoo set Reproducibility to Always.
BruceyPoo set Severity to None.
BruceyPoo set Resolution to Open.
BruceyPoo set Legacy ID to 4139929830.May 7 2016, 2:43 PM
Unknown Object (User) added a subscriber: Unknown Object (User).May 7 2016, 2:43 PM
Unknown Object (User) added a comment.Jun 22 2013, 2:09 AM

use something more than just the sound, use the marking on the grounds

BruceyPoo added a comment.Jun 22 2013, 2:26 AM

By "note how fast the bullets are being fired" I didn't just mean the sound of the bullets, I also meant looking at the ammo count and noting how fast it decreases, and indeed, how many bullets hit the ground.

All of which indicate a lower firing rate with lower frame rate.

ArkanSvk added a comment.Jun 22 2013, 3:54 AM

OK Here are the results

TEST 1 - Netbook(28-30 FPS, FRAPS):
Ammo start: 5000
Ammo end: 3240
Test duration: 60 seconds
Calculated Rate of Fire: 1760 rpm

TEST 2 - Desktop(57-58 FPS, FRAPS):
Ammo start: 5000
Ammo end: 1464
Test duration: 60 seconds
Calculated Rate of Fire: 3536 rpm

Game version: Beta 0.71.106777 - development branch.

UPDATE: Added calculated rate of fire.
UPDATE2: Both tests are based on in-game stopwatch too.

BruceyPoo added a comment.Jun 22 2013, 3:08 AM

@ArkanSvk: I have no idea why I didn't think to do that test before! I've done one myself for quantitative purposes:

Game version: Beta 0.71.106777 - development branch.

TEST 1: High framerate (55-60+ FPS: object distance set to 500, helicopter at "The Spartan")
Ammo Start = 5000
Ammo End = 3850
Duration = 30 seconds
Calculated Rate of Fire = 2500 rpm

TEST 2: Low Framerate (15-20 fps: Set everything to high/ultra, max view/object distance, helicopter in the middle of Agia Marina)
Ammo Start = 5000
Ammo End = 4592
Duration = 30 seconds
Calculated Rate of Fire = 816 rpm

Please note: the time is measured using the IN-GAME watch alongside an IRL stopwatch. The in-game watch kept accurate time despite the differences in framerate.

If other people want to perform the same or similar tests with other helicopters, please post!

vryoffbtdrummr added a comment.Jun 22 2013, 5:28 AM

there is no helicopter called the Ka-60 in the dev version...just saying.

Unknown Object (User) added a comment.Jun 22 2013, 11:56 PM

vryoffbtdrummr, i think you haven't played alpha, the chopper was renamed PAC (or POC?) 30, just another placeholder.

brucey, your tests convinced me, indeed this is a problem.

Upvoted.

vryoffbtdrummr added a comment.Jun 23 2013, 12:06 AM

he said the test was in the dev version. as of now, there is no such thing as a Ka-60

BruceyPoo added a comment.Jun 23 2013, 12:26 AM

Yes you're right. It's the Orca now.

But this is not limited to the dev version/beta. It's been like this since release.

DaveZember added a comment.Jun 23 2013, 1:06 AM

This glitch is detrimental. Please fix it as soon as possible.

MadDogX added a subscriber: MadDogX.May 7 2016, 2:44 PM
MadDogX added a comment.Aug 13 2014, 2:14 PM

Mass closing ancient tickets with no activity for > 12 months; assume fixed or too trivial.

If this issue is still relevant in current dev build, please re-post.

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