Constraints unable to constrain when in long chains

[Judgy_Oreo (DisplayName)]

Repro steps:

• Download the repro file:
  cable-constraint-not-constraining-bugrepro.rbxl (60.5 KB)

• Press F8 or the Run button to start a Server-only playtest

Expected behavior:
The end of the cable should snap to the Red part immediately when it is moved by the CreateSegments Script in the Cable Model in the Workspace.

Actual behavior:

It slides along the ground unenthusiastically.

Occurs regardless of whether PhysicsSteppingMethod is Adaptive or Fixed

Frequency: Always
First experienced: 24/11/2024

[thirdtakeonit]

Thanks for the report! I filed a ticket in our internal database.

[SolenoidalField]

Hi Judgy_Oreo,
This is a quirk of our position correction system in Roblox. When you are setting a CFrame it is done outside the physics solver and then the solver has to position correct over several frames. You might get a result you prefer by using AlignPosition on the CableEnd. I did it myself and find the motion better to my eye. If you do try using AlignPosition, make sure you check the rigidity enabled box so that the solver applies as much force as possible each frame, this will keep the chain and end together. Hope this helps.

[Judgy_Oreo (DisplayName)]

Thanks for the clarification, I’ll keep it in mind