///<summary>
/// Extracts the points of the paths in a flat {@link PathIterator} into
/// a list of Coordinate arrays.
///</summary>
/// <param name="pathGeometry">A path figure collection</param>
/// <returns>A list of coordinate arrays</returns>
/// <exception cref="ArgumentException">If a non-linear segment type is encountered</exception>
private static IList<Coordinate[]> ToCoordinates(PathGeometry pathGeometry)
{
if (pathGeometry.MayHaveCurves())
throw new ArgumentException("WPF geometry must not have non-linear segments");
var coordArrays = new List<Coordinate[]>();
var pathFigures = pathGeometry.Figures;
foreach (PathFigure pathFigure in pathFigures)
{
var pts = NextCoordinateArray(pathFigure);
coordArrays.Add(pts);
}
return coordArrays;
}