[Bug]: Zero G favors axis aligned movement

[Kevadroz]

Bug Description

When on space stations, any attempt to move while running in a non-cardinal direction will result in perceptibly the same speed as moving while not running, while running while facing a cardinal axis will result in a considerable speed gain.

How to Reproduce?

1. Get into a zero g environment (space station).
2. Relocate yourself to a space without any blocks to walk on.
3. Attempt to run diagonally.

Expected Behavior

Running while facing a non-cardinal direction results in moving at the same speed as running in a cardinal direction.

Version

1.15.18

Mod Loader Version

1.20.1 - 47.3.10

Mod Loader

Forge

Logs or additional context

No relevant logs. However from my own debugging I have deduced that this could be a symptom of MC-184530.

Code of Conduct

• I have searched the issue tracker and confirmed that the issue has not been reported
• I have checked the FAQ (if one is present) and my issue is not listed
• I have verified that I am using the latest version of the mod
• I have verified that I have installed all the required dependencies for the mod
• I have verified that I do not have Optifine installed. We will close issues if we detect Optifine is in your pack. We cannot fix Optifine issues. Please do not report issues with Optifine present.

[Kevadroz]

After a bit more debugging I have found the cause of this bug: a bit of code in LivingEntity#aiStep just before the Entity#setDeltaMovement zeroes the motion if it's below a certain value. But this is done individually with x, y and z. causing this problem.

[Kevadroz]

After creating a mixin to lower the minimum speed an entity can have I have also discovered that this bug makes walking have a significant lower speed than intended, moving at a constant 0.001~ blocks per (tick? second?) instead of the slow acceleration that exists with this mixin applied.