public static TBD.Perimeter ToTAS(this BHG.Polyline polyline, TBD.Perimeter tbdPerimeter)
{
if (polyline == null)
{
return(tbdPerimeter);
}
TBD.Polygon poly = tbdPerimeter.CreateFace();
poly = polyline.ToTASPolygon(poly);
return(tbdPerimeter);
}