Add Torque from another objects current rotation?

Hi,

I haven't been able to find a solution to this. I'm trying to add torque to a rigidbody in the same direction as leader object's current rotation.

I think I'm calculating the direction of the leader object's rotation with a CurrentOrientation * Quaternion.Inverse(OldOrientation)

I then AddTorque to the follower converting the result to a eulerAngle but the resulting rotation is not in the same direction.

Any help would be much appreciated.

 

Euler Angela are an agreed upon sequence of rotations, one after another. What you’re looking for is probably the Vector3 around which you can rotate the one object to match the other one.. I just went quickly over the quaternion docs and found this:
https://docs.unity3d.com/ScriptReference/Quaternion.ToAngleAxis.html

use that on the quaternion that represents the “difference” of rotation between your objects like you already have. Maybe you need to swap around the parts before and after the multiplication, but I guess you’re on a good path!

let me know if it helps

 

Thank you for the reply, I'm not quite sure how ToAnglesAxis relates to this problem. Here's how I'm trying to use it but I'm guessing that's incorrect:

Code (CSharp):

1.  void FixedUpdate()
2.     {
3.         LeaderObj.transform.LookAt(rt);
4.  
5.         CurrentRotation = LeaderObj.transform.rotation;
6.         DirofRotation = LastRotation * Quaternion.Inverse(CurrentRotation);
7.       //  var boop = Quaternion.Inverse(DirofRotation);
8.        var RotAngleX = Quaternion.AngleAxis(torque, DirofRotation.eulerAngles);
9.         rb.AddTorque(RotAngleX.eulerAngles * torque , myForce);
10.         Debug.Log(DirofRotation);
11.         LastRotation = LeaderObj.transform.rotation;
12.     }

 

WOot!
I found a solution here.

The solution:

Code (CSharp):

1.  void FixedUpdate()
2.     {
3.         LeaderObj.transform.LookAt(rt);
4.  
5.         CurrentRotation = LeaderObj.transform.rotation;
6.         DirofRotation = CurrentRotation * Quaternion.Inverse(LastRotation);
7.         rb.AddTorque(DirofRotation.x * torque, DirofRotation.y * torque, DirofRotation.z * torque, myForce);
8.         Debug.Log(DirofRotation);
9.         LastRotation = LeaderObj.transform.rotation;
10.     }