public Location Locate(Coordinate p)
{
RayCrossingCounter rcc = new RayCrossingCounter(p);
RayCrossingSegmentFilter filter = new RayCrossingSegmentFilter(rcc);
geom.Apply(filter);
return rcc.Location;
}
///<summary>
/// Determines the <see cref="GeoAPI.Geometries.Location"/> of a point in a ring.
/// This method is an exemplar of how to use this class.
///</summary>
/// <param name="p">The point to test</param>
/// <param name="ring">An array of Coordinates forming a ring</param>
/// <returns>The location of the point in the ring</returns>
public static Location LocatePointInRing(Coordinate p, Coordinate[] ring)
{
var counter = new RayCrossingCounter(p);
for (int i = 1; i < ring.Length; i++)
{
var p1 = ring[i];
var p2 = ring[i - 1];
counter.CountSegment(p1, p2);
if (counter.IsOnSegment)
return counter.Location;
}
return counter.Location;
}
/// <summary>
/// Determines the <see cref="Location"/> of a point in a ring.
/// </summary>
/// <param name="p">The point to test</param>
/// <param name="ring">A coordinate sequence forming a ring</param>
/// <returns>The location of the point in the ring</returns>
public static Location LocatePointInRing(Coordinate p, ICoordinateSequence ring)
{
var counter = new RayCrossingCounter(p);
var p1 = new Coordinate();
var p2 = new Coordinate();
for (var i = 1; i < ring.Count; i++)
{
ring.GetCoordinate(i, p1);
ring.GetCoordinate(i - 1, p2);
counter.CountSegment(p1, p2);
if (counter.IsOnSegment)
return counter.Location;
}
return counter.Location;
}
///<summary>
/// Determines the <see cref="GeoAPI.Geometries.Location"/> of a point in a ring.
/// This method is an exemplar of how to use this class.
///</summary>
/// <param name="p">The point to test</param>
/// <param name="ring">An array of Coordinates forming a ring</param>
/// <returns>The location of the point in the ring</returns>
public static Location LocatePointInRing(Coordinate p, Coordinate[] ring)
{
var counter = new RayCrossingCounter(p);
for (int i = 1; i < ring.Length; i++)
{
var p1 = ring[i];
var p2 = ring[i - 1];
counter.CountSegment(p1, p2);
if (counter.IsOnSegment)
{
return(counter.Location);
}
}
return(counter.Location);
}
/// <summary>
/// Determines the <see cref="LocationUtility" /> of a point in an areal <see cref="IGeometry" />.
/// </summary>
/// <param name="p"> the point to test</param>
/// <returns> the location of the point in the geometry</returns>
public Location Locate(ICoordinate p)
{
RayCrossingCounter rcc = new RayCrossingCounter(p);
SegmentVisitor visitor = new SegmentVisitor(rcc);
_index.Query(p.Y, p.Y, visitor);
/*
* // MD - slightly slower alternative
* List segs = index.query(p.y, p.y);
* countSegs(rcc, segs);
*/
return(rcc.Location);
}
/// <summary>
/// Determines the <see cref="Location"/> of a point in a ring.
/// </summary>
/// <param name="p">The point to test</param>
/// <param name="ring">A coordinate sequence forming a ring</param>
/// <returns>The location of the point in the ring</returns>
public static Location LocatePointInRing(Coordinate p, ICoordinateSequence ring)
{
var counter = new RayCrossingCounter(p);
var p1 = new Coordinate();
var p2 = new Coordinate();
for (var i = 1; i < ring.Count; i++)
{
ring.GetCoordinate(i, p1);
ring.GetCoordinate(i - 1, p2);
counter.CountSegment(p1, p2);
if (counter.IsOnSegment)
{
return(counter.Location);
}
}
return(counter.Location);
}
/// <summary>
/// Determines whether a point lies in the interior, on the boundary, or in the
/// exterior of a ring.The ring may be oriented in either direction.
/// <para/>
/// This method does<i> not</i> first check the point against the envelope of
/// the ring.
/// </summary>
/// <param name="p">The point to check for ring inclusion</param>
/// <param name="ring">A <c>CoordinateSequence</c> representing the ring (which must have
/// first point identical to last point)</param>
public static Location LocateInRing(Coordinate p, ICoordinateSequence ring)
{
return(RayCrossingCounter.LocatePointInRing(p, ring));
}
public SegmentVisitor(RayCrossingCounter counter)
{
_counter = counter;
}
public RayCrossingSegmentFilter(RayCrossingCounter rcc)
{
this.rcc = rcc;
}
///<summary>
/// Determines whether a point lies in the interior, on the boundary, or in the exterior of a ring.
///</summary>
/// <remarks>
/// <para>The ring may be oriented in either direction.</para>
/// <para>This method does <i>not</i> first check the point against the envelope of the ring.</para>
/// </remarks>
/// <param name="p">Point to check for ring inclusion</param>
/// <param name="ring">An array of coordinates representing the ring (which must have first point identical to last point)</param>
/// <returns>The <see cref="Location"/> of p relative to the ring</returns>
public static Location LocatePointInRing(Coordinate p, Coordinate[] ring)
{
return(RayCrossingCounter.LocatePointInRing(p, ring));
}
