private void ClearAllHighLight()
{
if (m_activeElem == null) return;
ElementGeometry elemGeom = m_creationData.Creator.ElemGeomDic[m_activeElem];
foreach (Edge edge in m_creationData.Creator.SupportEdges[m_activeElem])
{
elemGeom.EdgeBindingDic[edge].IsHighLighted = false;
}
}