public LineSegment Reduce(EndpointKind kind)
{
if (!IsReducable())
{
throw new ArgumentException("cannot reduce line of length 1");
}
switch (kind)
{
case EndpointKind.From:
switch (Direction)
{
case LineDirection.North:
return(new LineSegment(Id, Origin, From.Move(Vector.DeltaNorth), To, Type, Direction));
case LineDirection.South:
return(new LineSegment(Id, Origin, From.Move(Vector.DeltaSouth), To, Type, Direction));
case LineDirection.East:
return(new LineSegment(Id, Origin, From.Move(Vector.DeltaEast), To, Type, Direction));
case LineDirection.West:
return(new LineSegment(Id, Origin, From.Move(Vector.DeltaWest), To, Type, Direction));
default:
throw new ArgumentOutOfRangeException();
}
case EndpointKind.To:
switch (Direction)
{
case LineDirection.North:
return(new LineSegment(Id, Origin, From, To.Move(Vector.DeltaSouth), Type, Direction));
case LineDirection.South:
return(new LineSegment(Id, Origin, From, To.Move(Vector.DeltaNorth), Type, Direction));
case LineDirection.East:
return(new LineSegment(Id, Origin, From, To.Move(Vector.DeltaWest), Type, Direction));
case LineDirection.West:
return(new LineSegment(Id, Origin, From, To.Move(Vector.DeltaEast), Type, Direction));
default:
throw new ArgumentOutOfRangeException();
}
default:
throw new ArgumentOutOfRangeException(nameof(kind), kind, null);
}
}
public Cursor Move(Coord delta)
{
return(new Cursor(Pos.Move(delta)));
}