/// <summary>
/// Checks validity of a LinearRing.
/// </summary>
/// <param name="g"></param>
private void CheckValidRing(ILinearRing g)
{
CheckClosedRing(g);
if (_validErr != null) return;
GeometryGraph graph = new GeometryGraph(0, g);
LineIntersector li = new RobustLineIntersector();
graph.ComputeSelfNodes(li, true);
CheckNoSelfIntersectingRings(graph);
}
/// <summary>
///
/// </summary>
/// <param name="geom"></param>
/// <returns></returns>
private bool IsSimpleLinearGeometry(Geometry geom)
{
if (geom.IsEmpty)
return true;
GeometryGraph graph = new GeometryGraph(0, geom);
LineIntersector li = new RobustLineIntersector();
SegmentIntersector si = graph.ComputeSelfNodes(li, true);
// if no self-intersection, must be simple
if (!si.HasIntersection) return true;
if (si.HasProperIntersection) return false;
if (HasNonEndpointIntersection(graph)) return false;
if (HasClosedEndpointIntersection(graph)) return false;
return true;
}