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Inertial Dampeners aren't working properly

Raptor2213 shared this bug ago

Reported

Fired up the game, and fired up one of the test ships. Turned off inertial dampers so I didn't have to keep holding down the thrust button. Went out a ways and then turned around and came back. Lined it up and hit thrust again. Found my trajectory to be drifting off to the side, so held down forward thrust and turned dampers on - still drifting without correction. In SE1, turning Dampers on while holding down a thrust direction would normalize the remaining thrust.

You can see the ship 'drifting' to the side, even with Dampeners on.

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Rasmus Kullas

Potential issue with ship momentum calculations

When moving at high speeds towards a direction, if I let the ship slow down using its inertia dampeners while rotating the ship (no input from keyboard), the ship seems to gain speed sideways.

One way to easily replicate this is to fly away straight from starter asteroid in ship with powerful thrusters in one direction but weak in other directions. Then when max spead reached release throttle and turn the ship towards the asteroid. This at least for me gives the ship sideways momentum.

ATalkingRock

SE2: Thrust Dampeners not functioning properly based on cockpit orientation

Seemingly I've unfortunately discovered that my thrust dampeners do not function properly on my small ship. Whenever I turn my ship while holding W or S to go forward or backward, the left and right (port/starboard) facing thrusters do not dampen the sideways motion UNTIL i take my finger off the W key. I then found if I place a new cockpit but make it facing a new direction degrees, the dampeners then function properly.

See attached video where I enter my fighter and only press W while turning the ship. You'll notice the left and right thrusters are not firing to stop the sideways momentum until i take my hand off the W key. I then place a new cockpit but facing the left and the thruster dampeners function properly as they should.

I have tried this on multiple worlds. Have been able to replicate it on other ships by placing a cockpit block facing sideways and testing the dampening..

Is there anyway to fix this other than having to rebuild my ship in a new orientation?

stonelords

Thruster Dampening Bug

This bug appears to happen at times randomly to a grid in space or on planet where after thrusting in a particular direction and then turning and thrusting that direction the the side thrusters that should be slowing you down in the direction you just turned from will stop thrusting while your applying forward thrust, I have attached 3 videos showing this as well as a world with a grid.

steps to reproduce:

load the world attached
press W
Watch the front left side thruster stop firing as you press W

I have the same bug

Replies (8)

SE2 Community Support ●

Hello Raptor2213,

I suspect that what you experienced might be due to the ship itself rather than Inertial Dampeners. Blue Ship AE-1 which you have used in the video is a big ship and its side thrusters are not strong enough to compensate changing direction in short time on full speed.

Please try the same scenario as in video with Blue Scout N-S1 which is available to subscribe in KeenSWH Steam workshop.

b6a66074ac42c1a624ca081c66e3ccb9

Kind Regards,

Bartosz

Keen Software House

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Raptor2213 ●

No, you can clearly see that they just aren’t firing. Also, if this was an issue with them taking time to compensate, you’d see the drift slowly getting better. The drift was consistent throughout.

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SE2 Community Support ●

Hello Raptor2213,

Please use the contraption in the save file I've provided. I used it to check for drift on my end. Please record new video from this try.

Unpack the file in to this folder:

C:\Users\(Your Username)\AppData\Roaming\SpaceEngineers2\AppData\SaveGames

Kind Regards,

Bartosz

Keen Software House

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Raptor2213 ●

Seems to not be an issue with small grids. I did another test with a different large ship and this time when I turned dampeners on, it also killed my forward momentum for some reason - this isn't a thing that any small grid does. This issue ONLY appears to be impacting large grids.

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Bart Houseman ●

Hello Raptor and keen.

i have this problem too. before i make a ship i have to check in what direction i have to build . i use my thruster test world. i have put it in the workshop. ( no mods world)

its as if the cockpit is not the block that determine the direction of the grid.

https://steamcommunity.com/sharedfiles/filedetails/?id=3517747321

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SE2 Community Support ●

Hello All,

Thank you Bart Houseman for sharing a World. :) I have reproduced the issue and reported it internally. I have also added this thread to our internal ticket (SE2-25325).

Kind Regards,

Bartosz

Keen Software House

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Bart Houseman ●

Your welcome.

see u all in space ;)

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Nils Willing ●

Hey, I had the same issue on my first playthrough of the new Survival. The ship goes upwards even though I am in gravity and not pressing the space bar. Same for downwards, the this is always at a constant up/down speed. Right/left and backward/forward bugs likewise. After reloading the world, the bug sometime disappeares, I attached the save and a Video of it anyways.

Furthermore, as you can hear in the video, the thrusters are playing their fireing sound and they dont have any flame visuals. Not sure if there are already bug reports on this.

But besides this, awesome work with VS2 Keen!

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SE2 Community Support ●

Hello ATalkingRock,

Could you please provide a blueprint of your affected Grid or the Save File where the issue occurs? Is there anything specific you did while building this ship?

Kind Regards,

Bartosz

Keen Software House

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ATalkingRock ●

Hi! Sure i can attach a link to a blueprint. But I can say, even on the small ships on one of the default worlds, that if you place a new cockpit block essentially pointing to the left or right that ships' left and right dampeners dont function similar to what seen in the vide. Its almost like the grids have a pre-set forward direction which unfortunately doesnt coincide with my ship.

https://steamcommunity.com/sharedfiles/filedetails/?id=3666466093 heres a link to a early version of my ship

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ATalkingRock ●

Hey! Just following up, any confirmation that ya'll were able to replicate this?

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Joshua BP ●

I have the exact same issue. I can replicate it with any ship. It happens once you deactivate dampeners and after that the dampener don't work like tzey are supposed to. Up and down dampening works, just not sideways. It is quite annoying. If there is anything I can do to help let me know.

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ATalkingRock ●

I ended up fixing it by completely rebuilding the ship from scratch but tested the grid first that the thrusters would work.

I imagine the cause is when we place a cockpit that doesn't align or point in the direction of the grids "invisible front facing direction"

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Joshua BP ●

That may be so but that can't be the solution. This bug happens with any grid. The grid in my example video is from the workshop by diggrock. I hope the devs find a solution. Thx for you reply tho

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ATalkingRock ●

I mean I definitely agree. It's not an efficient solution by any means

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SuperDK7 ●

Just a heads up that many people are also reporting this issue under different wording/descriptions of the issue.

Character inertia dampeners fail | Space Engineers 2 Support

jetpack drift on Kemit planet. | Space Engineers 2 Support

Inertial Dampeners aren't working properly | Space Engineers 2 Support

random movement when jetpack on near parked ship | Space Engineers 2 Support

etc.

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jake R ●

https://youtu.be/87y9xxchguo upvoted and confirmed bug --- my best guess as a armchair dev lol--So that’s a close guess The problem is that when they implemented the gravity dampening system when planets arrived they changed something within the code that has to do with the compensation in the rest of the directions so if you’ll notice on planets, the system works continuously in one specific direction all the time without any failures that’s downward in the direction of gravity so whatever they did with that system when they implemented, it broke the rest of the system

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ZedX ●

i have the same problem, when flying in atmosphere, it feels like your ship has power issues even when it does not.

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Wilhelm ●

Hi, I have observed this also in the current release, and it appears to be a physics problem vs. a ship design problem though the ship in question does have underpowered side thrusters.

The physics problem seems to be with momentum calculations of the rotating ship.

Setup:

In this configuration as the test ship, I'm using the excellent Mission Runner by Diggrok (on the workshop). This ship has stronger upward, forward and back thrust, weaker side to side and down thrust. Accelerate to max speed and engage inertial dampeners. Observe the speed lines. Now comes the strange part.

Observation:

With the dampeners still active (test was done in 3rd person), turn the ship 90 degrees so that the left side of the ship is now facing the direction of movement. Speed lines now are going cross the screen left to right. Momentum is preserved.
Engage inertial dampeners. Left ship thrusters start to slow the ship down, slowly (because they're underpowered)
Rotate the ship 90 degrees (E key) so that the powerful downward-facing thrust is turned into the direction of movement to counter the momentum..
Notice that the speed lines are still going left to right across the screen and the side thrusters are still the only ones firing and the rate of slowing down is the same as prior to the roll. The ship's momentum vector has shifted 90 degrees with the roll. You can continue to redirect the momentum as you roll, even to the point of going the opposite direction with a 180 degree roll.

This seems to happen almost constantly, I say almost because some very high speed tests were less reliable, sub 400km/h seem to be more consistent. If you don't see it right away, then rotate the ship a small % one way and then the other until you start to see the speed lines stick with your rotation, then you're hooped and rotating any direction the momentum remains fixed to that side until speed reaches zero.

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Wilhelm ●

Ah, correction/clarification in my steps under Observation after doing a re-read. Flip all the 'engage inertial dampeners' with disengage inertial dampeners in the setup and first two steps. Apologies. Should read:

Setup:

In this configuration as the test ship, I'm using the excellent Mission Runner by Diggrok (on the workshop). This ship has stronger upward, forward and back thrust, weaker side to side and down thrust. Accelerate to max speed and disengage inertial dampeners. Observe the speed lines. Now comes the strange part.

Observation:

With the dampeners still inactive (test was done in 3rd person), turn the ship 90 degrees so that the left side of the ship is now facing the direction of movement. Speed lines now are going cross the screen left to right. Momentum is preserved.
Engage inertial dampeners. Left ship thrusters start to slow the ship down, slowly (because they're underpowered)
Rotate the ship 90 degrees (E key) so that the powerful downward-facing thrust is turned into the direction of movement to counter the momentum. (this should start to more rapidly slow the ship down, it doesn't)
Notice that the speed lines are still going left to right across the screen and the side thrusters are still the only ones firing and the rate of slowing down is the same as prior to the roll. The ship's momentum vector has shifted 90 degrees with the roll. You can continue to redirect the momentum as you roll, even to the point of going the opposite direction with a 180 degree roll.

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jake R ●

updated video https://studio.youtube.com/video/IMvO9yrr8J4/edit

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SE2 Community Support ●

Hello Engineers,

Placing a cockpit or control seat in 90 degree angle to first block of a Grid causes the Inertial Dampeners to not work correctly. For a workaround, please make sure to place the control block first or mark the axis of the first block.

Please note that this is a known issue which is already reported internally.

Kind Regards,

Bartosz

Keen Software House

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Wilhelm ●

Hey Bartosz, thanks for the info. I'm not sure my above repro steps are suffering from what you're describing as the root cause, it might be the solution to the original question. In this case, should I open a new bug?

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jake R ●

i dont think this is the main issue as every ship i have does this intermittently not indefinitely, that being said it may be A issue related - id also look deeper into the issue regarding this

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SuperDK7 ●

ignore this comment - mistake

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