Use to create a link that behaves as if the source object has grabbed the destination object
Creates a link that preserves the orientation and position of the destination object relative to the source object.
hand = viz.add('marker.wrl')
hand.setPosition([0,1.8,3])
grabable = viz.add('ball.wrl')
grabable.setPosition([0.5,1.8,3])
viz.grab(hand,grabable)