private IEnumerable<IFillerVertex> GetNextEmptyCandidates(MarkupFiller filler)
{
foreach (var vertex in filler.GetLinePoints(this, First))
yield return vertex;
foreach (var vertex in filler.GetLinePoints(this, Second))
yield return vertex;
}
public IEnumerable<IFillerVertex> GetNextCandidates(MarkupFiller filler, IFillerVertex prev)
{
switch (prev)
{
case EnterFillerVertex prevE:
return filler.GetLinePoints(this, First.ContainsPoint(prevE.Point) ? Second : First);
case IntersectFillerVertex prevI:
return filler.GetLinePoints(this, prevI.LinePair.ContainLine(First) ? Second : First);
default:
return GetNextEmptyCandidates(filler);
}
}
private IEnumerable <IFillerVertex> GetPointLinesPoints(MarkupFiller filler)
{
foreach (var line in Point.Lines)
{
foreach (var vertex in filler.GetLinePoints(this, line))
{
yield return(vertex);
}
}
}