[1.199] Subgrid dampening does not work if the subgrid has active thrusters

Merii shared this bug 2 years ago
Reported

Ship dampeners still do not properly take subgrid mass into account in gravity if the attached subgrid (another ship, usually) has active thrusters.


Reproduction:

  1. In a gravity well, take two ships, one of which that could support the mass of the other.
  2. Dock the smaller ship on top of the larger ship using a Connector.
  3. Disable the dampeners of the smaller ship.

Actual behavior:

If the smaller ship's thrusters remain enabled, both ships will begin to drift downward. Disabling the thrusters on the smaller ship makes the thrusters of the larger ship compensate correctly.

This appears to be the case as well if the smaller ship's dampeners are re-enabled - as long as the smaller ship has active thrusters, gravity compensation will fail on the larger ship and it will slowly drift downward.

Expected behavior:

The subgrid mass is correctly taken into account and thrusters can be left enabled with dampeners off on the subgrid.

Replies (3)

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Hello, Merii,

thanks for letting us know about this issue.

It was successfully reproduced and put into our internal system.

Kind Regards

Keen Software House: QA Department

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Having the same issue, except I have a non-ship subgrid. I have an atmo ship with drills on a hinge. I know the ship has plenty of lift and I have used it for a while, but I added 2 hinges each with a drill on the end of it, and now the ship drifts downward. This is happening on Europa (0.25g). Thanks!

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I have a similar issue with subgrids. I have a crane and ship design that uses an advanced rotor's ability to attach and detach rotor heads to allow for "tool switching" by detaching a subgrid and then attaching a different subgrid on it. For example one subgrid has a pair of grinders on it while another subgrid has a pair of welders.


I noticed the issue when flying in Keen NA #4 a few weeks ago when flight-testing my XQ-5 drone. https://steamcommunity.com/sharedfiles/filedetails/?id=2993558301


There, I had made a welder subgrid in addition to the drill subgrid shown on blueprint's portrait. Whenever I hooked up to the subgrid and unlocked it from its magnet on the static grid, the craft would slowly sink down. I found a workaround to this by detaching the subgrid a second time without being maglocked to a static grid (either from a magnet on the subgrid itself or a magnet on the static grid) and then re-attaching it.

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