public bool Intersects(Coordinate pt, LineString ring)
{
var seq = ring.CoordinateSequence;
var seqProj = Project(seq, _facingPlane);
var ptProj = Project(pt, _facingPlane);
return(Location.Exterior != RayCrossingCounter.LocatePointInRing(ptProj, seqProj));
}
public Location Locate(Coordinate p)
{
var rcc = new RayCrossingCounter(p);
var filter = new RayCrossingSegmentFilter(rcc);
geom.Apply(filter);
return(rcc.Location);
}
private Location Locate(Coordinate pt, LineString ring)
{
var seq = ring.CoordinateSequence;
var seqProj = Project(seq, _facingPlane);
var ptProj = Project(pt, _facingPlane);
return(RayCrossingCounter.LocatePointInRing(ptProj, seqProj));
}
public void TestRunPtInRing4d()
{
var cs = new PackedCoordinateSequenceFactory(PackedCoordinateSequenceFactory.PackedType.Double)
.Create(new double[] {
0.0, 0.0, 0.0, 0.0,
10.0, 0.0, 0.0, 0.0,
5.0, 10.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0
}, 4, 1);
Assert.AreEqual(Location.Interior, RayCrossingCounter.LocatePointInRing(new Coordinate(5.0, 2.0), cs));
}
protected override void RunPtInRing(Location expectedLoc, Coordinate pt, string wkt)
{
var geom = reader.Read(wkt);
Assert.AreEqual(expectedLoc, RayCrossingCounter.LocatePointInRing(pt, geom.Coordinates));
var poly = geom as Polygon;
if (poly == null)
{
return;
}
Assert.AreEqual(expectedLoc, RayCrossingCounter.LocatePointInRing(pt, poly.ExteriorRing.CoordinateSequence));
}
///<summary>
/// Determines the <see cref="Location"/> 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(Coordinate p)
{
var rcc = new RayCrossingCounter(p);
var 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 an areal <see cref="Geometry"/>.
/// </summary>
/// <param name="p">The point to test</param>
/// <returns>The location of the point in the geometry
/// </returns>
public Location Locate(Coordinate p)
{
// avoid calling synchronized method improves performance
if (_index == null)
{
CreateIndex();
}
var rcc = new RayCrossingCounter(p);
var 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 an areal <see cref="Geometry"/>.
/// </summary>
/// <param name="p">The point to test</param>
/// <returns>The location of the point in the geometry
/// </returns>
public Location Locate(Coordinate p)
{
if (_index == null)
{
_index = new IntervalIndexedGeometry(_geom);
// no need to hold onto geom
_geom = null;
}
var rcc = new RayCrossingCounter(p);
var 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);
}
/**
* Node a LinearRing and return a MultiPolygon containing
* <ul>
* <li>a single Polygon if the LinearRing is simple</li>
* <li>several Polygons if the LinearRing auto-intersects</li>
* </ul>
* This is used to repair auto-intersecting Polygons
*/
private NetTopologySuite.Geometries.Geometry getArealGeometryFromLinearRing(LinearRing ring)
{
if (ring.IsSimple)
{
return(ring.Factory.CreateMultiPolygon(new Polygon[] {
ring.Factory.CreatePolygon(ring, EMPTY_RING_ARRAY)
}));
}
else
{
// Node input LinearRing and extract unique segments
ISet <LineString> lines = nodeLineString(ring.Coordinates, ring.Factory);
lines = getSegments(lines);
// Polygonize the line network
Polygonizer polygonizer = new Polygonizer();
polygonizer.Add((ICollection <NetTopologySuite.Geometries.Geometry>)lines);
// Computes intersections to determine the status of each polygon
ICollection <NetTopologySuite.Geometries.Geometry> geoms = new List <NetTopologySuite.Geometries.Geometry>();
foreach (NetTopologySuite.Geometries.Geometry g in polygonizer.GetPolygons())
{
Polygon polygon = (Polygon)g;
Coordinate p = polygon.InteriorPoint.Coordinate;
var location = RayCrossingCounter.LocatePointInRing(p, ring.CoordinateSequence);
if (location == NetTopologySuite.Geometries.Location.Interior)
{
geoms.Add(polygon);
}
}
NetTopologySuite.Geometries.Geometry unionPoly = UnaryUnionOp.Union(geoms);
NetTopologySuite.Geometries.Geometry unionLines = UnaryUnionOp.Union(lines).Difference(unionPoly.Boundary);
geoms.Clear();
decompose(unionPoly, geoms);
decompose(unionLines, geoms);
return(ring.Factory.BuildGeometry(geoms));
}
}
public SegmentVisitor(RayCrossingCounter counter)
{
_counter = counter;
}
public RayCrossingSegmentFilter(RayCrossingCounter rcc)
{
this.rcc = rcc;
}
protected override void RunPtInRing(Location expectedLoc, Coordinate pt, String wkt)
{
IGeometry geom = reader.Read(wkt);
Assert.AreEqual(expectedLoc, RayCrossingCounter.LocatePointInRing(pt, geom.Coordinates));
}
