public override void ExclusiveUpdate()
{
//"Warm start" the constraint by applying a first guess of the solution should be.
entity.ApplyLinearImpulse(ref accumulatedImpulse);
Vector3 taImpulse;
Vector3.Cross(ref r, ref accumulatedImpulse, out taImpulse);
entity.ApplyAngularImpulse(ref taImpulse);
}