public static Line GetUnionLine([NotNull] this List <Line> lines)
{
using var wasteLines = new DisposableSet <Line>();
Line prew = null !;
Line?unionLine = null;
foreach (var l in lines)
{
if (prew == null)
{
prew = l;
continue;
}
var line = prew.GetUnionLine(l);
wasteLines.Add(line);
unionLine = prew;
prew = line;
}
if (unionLine == null)
{
return((Line)prew.Clone());
}
wasteLines.Remove(prew);
return(prew);
}
private static Region GetRegion([NotNull] IEnumerable <Curve> pls)
{
using (var regions = new DisposableSet <Region>(pls.CreateRegion()))
{
var reg = regions.Skip(1).Any() ? regions.ToList().UnionRegions() : regions.First();
regions.Remove(reg);
return(reg);
}
}