Unity Translation for this piece of code

Questions & Answers
1

Hi,
Can anyone give the translation of this code to unity C#?
Especially this line:
targetBody.GetXForm().R.col2

function killOrthogonalVelocity(targetBody:b2Body){
	var localPoint = new b2Vec2(0,0);
	var velocity:b2Vec2 = targetBody.GetLinearVelocityFromLocalPoint(localPoint);
 
	var sidewaysAxis = targetBody.GetXForm().R.col2.Copy();
	sidewaysAxis.Multiply(b2Math.b2Dot(velocity,sidewaysAxis))
 
	targetBody.SetLinearVelocity(sidewaysAxis);//targetBody.GetWorldPoint(localPoint));
}
2

I just shoot in the dark with this answer:

This will remove any velocity on the local forward axis(z) and the local up axis (y). Only the velocity on the x-axis (right) will remain:

void KillOrthogonalVelocity(Rigidbody aBody)
{
    Transform t = aBody.transform;
    Vector3 velocity = aBody.velocity;
    velocity = t.right * Mathf.Dot(t.right,velocity);
    aBody.velocity = velocity;
}
// ps: code is not tested.

If that’s not what you want, edit your question and tell us what exactly you want to achieve.