double normParam = 0.5 * ( nodes[i].normParam + nodes[i-1].normParam );
edgeID = linSide->EdgeID( linSide->EdgeIndex( normParam ));
double normParam = 0.5 * ( nodes[i].normParam + nodes[i-1].normParam );
edgeID = linSide->EdgeID( linSide->EdgeIndex( normParam ));