/// <summary>
/// Remove the segs in the section of the line.
/// </summary>
/// <param name="line"></param>
/// <param name="start"></param>
/// <param name="end"></param>
private void Remove(TaggedLineString line, int start, int end)
{
for (int i = start; i < end; i++)
{
TaggedLineSegment seg = line.GetSegment(i);
inputIndex.Remove(seg);
}
}
/// <summary>
///
/// </summary>
/// <param name="line"></param>
public virtual void Add(TaggedLineString line)
{
TaggedLineSegment[] segs = line.Segments;
for (int i = 0; i < segs.Length - 1; i++)
{
TaggedLineSegment seg = segs[i];
Add(seg);
}
}
/// <summary>
///
/// </summary>
/// <param name="coords"></param>
/// <param name="parent"></param>
/// <returns></returns>
protected override ICoordinateSequence TransformCoordinates(ICoordinateSequence coords, IGeometry parent)
{
if (parent is LineString)
{
TaggedLineString taggedLine = (TaggedLineString)container.lineStringMap[parent];
return(CreateCoordinateSequence(taggedLine.ResultCoordinates));
}
// for anything else (e.g. points) just copy the coordinates
return(base.TransformCoordinates(coords, parent));
}
/// <summary>
///
/// </summary>
/// <param name="parentLine"></param>
/// <param name="sectionIndex"></param>
/// <param name="candidateSeg"></param>
/// <returns></returns>
private bool HasBadIntersection(TaggedLineString parentLine, int[] sectionIndex, LineSegment candidateSeg)
{
if (HasBadOutputIntersection(candidateSeg))
{
return(true);
}
if (HasBadInputIntersection(parentLine, sectionIndex, candidateSeg))
{
return(true);
}
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="geom"></param>
public virtual void Filter(IGeometry geom)
{
if (geom is LinearRing)
{
TaggedLineString taggedLine = new TaggedLineString((LineString)geom, 4);
container.lineStringMap.Add(geom, taggedLine);
}
else if (geom is LineString)
{
TaggedLineString taggedLine = new TaggedLineString((LineString)geom, 2);
container.lineStringMap.Add(geom, taggedLine);
}
}
/// <summary>
/// Tests whether a segment is in a section of a TaggedLineString-
/// </summary>
/// <param name="line"></param>
/// <param name="sectionIndex"></param>
/// <param name="seg"></param>
/// <returns></returns>
private static bool IsInLineSection(TaggedLineString line, int[] sectionIndex, TaggedLineSegment seg)
{
// not in this line
if (seg.Parent != line.Parent)
{
return(false);
}
int segIndex = seg.Index;
if (segIndex >= sectionIndex[0] && segIndex < sectionIndex[1])
{
return(true);
}
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="parentLine"></param>
/// <param name="sectionIndex"></param>
/// <param name="candidateSeg"></param>
/// <returns></returns>
private bool HasBadInputIntersection(TaggedLineString parentLine, int[] sectionIndex, LineSegment candidateSeg)
{
IList querySegs = inputIndex.Query(candidateSeg);
for (IEnumerator i = querySegs.GetEnumerator(); i.MoveNext();)
{
TaggedLineSegment querySeg = (TaggedLineSegment)i.Current;
if (HasInteriorIntersection(querySeg, candidateSeg))
{
if (IsInLineSection(parentLine, sectionIndex, querySeg))
{
continue;
}
return(true);
}
}
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="line"></param>
public virtual void Simplify(TaggedLineString line)
{
this.line = line;
linePts = line.ParentCoordinates;
SimplifySection(0, linePts.Length - 1, 0);
}