Tear after changing length with cursor

[luvjungle]

Hi all!
Is it possible to tear after changing length?
Here is my code for tearing:

Code:

    void Solver_OnCollision(object sender, ObiSolver.ObiCollisionEventArgs e)
    {
        var world = ObiColliderWorld.GetInstance();

        // just iterate over all contacts in the current frame:
        foreach (Oni.Contact contact in e.contacts)
        {
            // if this one is an actual collision:
            if (contact.distance > 0.01) continue;

            ObiColliderBase col = world.colliderHandles[contact.bodyB].owner;
            TearRope(col, contact);
        }
    }

    private void TearRope(ObiColliderBase col, Oni.Contact contact)
    {
        if (!col || !col.CompareTag(StaticData.tear)) return;

        ObiSolver.ParticleInActor pa = solver.particleToActor[contact.bodyA];
        if (pa == null) return;

        var actor = pa.actor as ObiRope;
        if (!actor) return;
       
        if (pa.indexInActor >= actor.elements.Count) return;

        actor.Tear(actor.elements[pa.indexInActor]);
        actor.RebuildConstraintsFromElements();
    }

It works for pre-created rope, but when I change length, it cuts somewhere at the end, not at collision point.
Please help.