Rigidbody2D - Max Rotation Speed / Max Angular Velocity?

Unity Engine
1

When adding torque you can’t limit the spin speed. Rigidbody2D doesn’t have a version of maxAngularVelocity like Rigidbody3D has.

What’s the best way to do this?

2

You could always cap the angular velocity on the Rigidbody2D yourself. Something simple like this should do it:

void FixedUpdate() 
{
  if(rb.angularVelocity > maxAngularVelocity ) {
     rb.angularVelocity = maxAngularVelocity;
  }
}
3

Thanks. That didn’t work properly at first, but I just I looked at it with Debug.Log and saw that it went into the negative when going right, so I just had to add another condition to your example.

void ClampAngularVelocity()
{
    if (rb.angularVelocity < -maxAngularVelocity) { rb.angularVelocity = -maxAngularVelocity; }
    if (rb.angularVelocity > maxAngularVelocity) { rb.angularVelocity = maxAngularVelocity; }
}
4

I used this because angularVelocity is a Vector3:

float fVertSpeed = vertical * Speed * fixedDeltaTime;
float fHorSpeed = horizontal * Speed * fixedDeltaTime;
rb.AddRelativeTorque(new Vector3(fVertSpeed, 0, fHorSpeed), ForceMode.VelocityChange);
Vector3 angularVel = rb.angularVelocity;
if (angularVel.x < -maxAngularVelocity;) { angularVel.x = -maxAngularVelocity; }
if (angularVel.x > maxAngularVelocity;) { angularVel.x = maxAngularVelocity; }
if (angularVel.y < -maxAngularVelocity;) { angularVel.y = -maxAngularVelocity; }
if (angularVel.y > maxAngularVelocity;) { angularVel.y = maxAngularVelocity; }
if (angularVel.z < -maxAngularVelocity;) { angularVel.z = -maxAngularVelocity; }
if (angularVel.z > maxAngularVelocity;) { angularVel.z = maxAngularVelocity; }
rb.angularVelocity = angularVel;
5

Please don’t necro posts like this, from 2016!

The above post is talking about 2D, angularVelocity is a scalar. You’re referring to 3D physics.