public static LucidPolygon Create(IEnumerable <IPoint> initialRing, LucidSpatialReference spatialReference = null)
{
if (initialRing.Count() < 2)
{
throw new Exception($"Invalid polygon ring. {initialRing} Too few vertices.");
}
var ring = GeometryHelper.Intersects(initialRing.First(), initialRing.Last())
? initialRing : initialRing.Concat(initialRing.Take(1));
return(new LucidPolygon()
{
Rings = new List <List <ILucidVertex> >()
{
new List <ILucidVertex>(ring.Select(p => p.AsVertex()))
},
SpatialReference = spatialReference
});
}
public static IEnumerable <IPoint> LineIntersections(ILucidLine first, ILucidLine second, bool infinitLines = false)
{
var firstExtent = CalculateExtent(first);
var secondExtent = CalculateExtent(second);
if (infinitLines || GeometryHelper.Intersects(first, second))
{
foreach (var firstLine in from p in first.Vertices.TumblingWindow(2)
select new AlgebraicLine(p.First(), p.Last()))
{
foreach (var secondLine in from p in second.Vertices.TumblingWindow(2)
select new AlgebraicLine(p.First(), p.Last()))
{
var intersection = Intersection(firstLine, secondLine);
if (intersection != null && (infinitLines || (GeometryHelper.Intersects(intersection, firstExtent) && GeometryHelper.Intersects(intersection, secondExtent))))
{
yield return(intersection);
}
}
}
}
}
public bool ExtentOverlaps(LucidPolygon other)
{
return(GeometryHelper.Intersects(this.AsExtent(), other.AsExtent()));
}