public static IEnumerable <ILucidVertex> RemoveSelfIntersections(ILucidLine lineIn)
{
var segments = (from s in lineIn.Vertices.SlidingWindow(2)
select s).Where(w => w.Count() == 2).ToArray();
var state = true;
foreach (var segment in segments)
{
if (state == true)
{
yield return(segment.First());
}
foreach (var otherSegment in from s in segments
where s != segment
select s)
{
var intersect = GeometryHelper.LineIntersections(LucidLine.Create(segment), LucidLine.Create(otherSegment)).Any();
if (intersect)
{
state = !state;
break;
}
}
}
yield return(lineIn.Vertices.Last());
}
public static LucidPolygon operator-(LucidPolygon first, LucidPolygon second)
{
throw new NotImplementedException();
LucidPolygon intersection = null;
if (!first.ExtentOverlaps(second))
{
return(null);
}
foreach (var segment in first.Vertices.SlidingWindow(2))
{
foreach (var secondSegment in second.Vertices.SlidingWindow(2))
{
var point = GeometryHelper.LineIntersections(LucidLine.Create(segment), LucidLine.Create(secondSegment)).FirstOrDefault();
if (point != null)
{
if (intersection == null)
{
intersection = new LucidPolygon();
}
intersection += point;
}
}
}
return(intersection);
}