/// <summary>
/// If the hLine lies below any line in this bottom edge,
/// then this bottom edge is adjusted accordingly.
/// </summary>
public override void Add(HLine hLine)
{
if (Lines.Count == 0)
{
Lines.Add(hLine);
}
else
{
TopEdge flippedEdge = FlipVertically();
HLine flippedLine = new HLine(hLine.Left, hLine.Right, -hLine.Y);
flippedEdge.AddLineToUpperEdge(flippedLine);
Lines = flippedEdge.FlippedLines;
}
}
