self.blendercxn.constraints.append(Constraint.Type.COPYLOC)
        const = self.blendercxn.constraints[0]
        const[Constraint.Settings.TARGET] = self.nodea.blenderobject

        self.blendercxn.constraints.append(Constraint.Type.COPYLOC)
        const = self.blendercxn.constraints[1]
        const.influence = 0.5 #the average location makes the midpoint
        const[Constraint.Settings.TARGET] = self.nodeb.blenderobject

        self.blendercxn.constraints.append(Constraint.Type.TRACKTO)
        const = self.blendercxn.constraints[2]
        const[Constraint.Settings.TARGET] = self.nodea.blenderobject
        const[Constraint.Settings.TRACK] = Constraint.Settings.TRACKZ
        const[Constraint.Settings.UP] = Constraint.Settings.UPY