protected RightObstacleSide FindFirstObstacleSideToTheLeftOfPoint(Point point)
{
var node =
RightObstacleSideTree.FindLast(
s => Point.PointToTheRightOfLineOrOnLine(point, s.Start, s.End));
return(node == null ? null : (RightObstacleSide)(node.Item));
}
RBNode <SegmentBase> GetActiveSideFromLeft(Point point)
{
return(RightObstacleSideTree.FindLast(side =>
PointToTheRightOfLineOrOnLineLocal(point, side.Start, side.End)));
}