e popup (tooltip) is shown.</td>
            </tr>
            <tr><td id="event_hidePopup">hidePopup</td>
                <td>none</td>
                <td>Fired when the popup (tooltip) is hidden.</td>
            </tr>
            <tr class="subHeader ">
                <td colspan="3">Events triggered the physics simulation. Can be used to trigger GUI updates.</td>
            </tr>
            <tr><td id="event_startStabilizing">startStabilizing</td>
                <td>none</td>
                <td>Fi