Resolved Slow rotating object stops randomly

Hi, In a scene I'm showing a bunch of cubes rotating slowly, using a random torque added on each one at the beginning.

• Gravity = false
• Drag and Angular drag = 0
• Positions constrained = XYZ
• Mass = 1

Sometimes, one will start rotating and suddenly stop. I think it happens when the rotation force added is too low. But it shouldn't stop if it started moving already under the conditions mentioned, am I wrong?

The rotation code, not really the issue I guess but just in case:

Code (CSharp):

1. float[] _alternate = { -1f, 1f };
2. obj.GetComponent<Rigidbody>().constraints = RigidbodyConstraints.FreezeRotation;
3. obj.GetComponent<Rigidbody>().constraints = RigidbodyConstraints.None;
4. obj.GetComponent<Rigidbody>().constraints = RigidbodyConstraints.FreezePosition;
5. obj.GetComponent<Rigidbody>().AddTorque(new Vector3(Random.Range(1f, 2f) * _alternate[Random.Range(0, 2)], Random.Range(1f, 2f) * _alternate[Random.Range(0, 2)], Random.Range(1f, 2f) * _alternate[Random.Range(0, 2)]) * 0.5f, ForceMode.VelocityChange);

Might look dumb but it was the only way I found to make torque "non zero" in any axes using negative values as well.


PD: Offtopic, is there a way to do

obj.GetComponent<Rigidbody>().constraints = RigidbodyConstraints.FreezeRotation -> NONE;

I'm doing some stupid workaround right now.

 

check out the sleepThreshold property of the rigidbody. Setting it to zero should keep it from falling asleep, which I assume might be what you're experiencing:

https://docs.unity3d.com/ScriptReference/Rigidbody-sleepThreshold.html

 

Thank you so much! Exactly what I needed.

I'm totally blind. I've checked Rigidbody docs many times trying to find the answer and I was about to give up and write a function to re-apply torque if any object stops, pretty dumb workaround.