protected void Initialize(Coordinate p0, Coordinate p1)
{
_p0 = p0;
_p1 = p1;
_dx = p1.X - p0.X;
_dy = p1.Y - p0.Y;
_quadrant = Quadrant.QuadrantLocation(_dx, _dy);
if (_dx == 0 && _dy == 0)
{
throw new InvalidOperationException("EdgeEnd with identical endpoints found.");
}
}
} // public Edge FindEdgeInSameDirection( Coordinate p0, Coordinate p1 )
/// <summary>
/// The coordinate pairs match if they define line segments lying in the same direction.
/// </summary>
/// <remarks>
/// E.g. the segments are parallel and in the same quadrant (as opposed to parallel and opposite!).
/// </remarks>
/// <param name="p0"></param>
/// <param name="p1"></param>
/// <param name="ep0"></param>
/// <param name="ep1"></param>
/// <returns></returns>
private bool MatchInSameDirection(Coordinate p0, Coordinate p1, Coordinate ep0, Coordinate ep1)
{
if (!p0.Equals(ep0))
{
return(false);
}
if (_cga.ComputeOrientation(p0, p1, ep1) == CGAlgorithms.COLLINEAR &&
Quadrant.QuadrantLocation(p0, p1) == Quadrant.QuadrantLocation(ep0, ep1))
{
return(true);
}
return(false);
} // private bool MatchInSameDirection( Coordinate p0, Coordinate p1, Coordinate ep0, Coordinate ep1 )
