private void ComputeContainmentDistance(int polyGeomIndex, GeometryLocation[] locPtPoly)
{
var polyGeom = _geom[polyGeomIndex];
// if no polygon then nothing to do
if (polyGeom.Dimension < Dimension.Surface)
{
return;
}
int locationsIndex = 1 - polyGeomIndex;
var polys = PolygonExtracter.GetPolygons(polyGeom);
if (polys.Count > 0)
{
var insideLocs = ConnectedElementLocationFilter.GetLocations(_geom[locationsIndex]);
ComputeContainmentDistance(insideLocs, polys, locPtPoly);
if (_minDistance <= _terminateDistance)
{
// this assigment is determined by the order of the args in the computeInside call above
_minDistanceLocation[locationsIndex] = locPtPoly[0];
_minDistanceLocation[polyGeomIndex] = locPtPoly[1];
}
}
}
/// <summary>
///
/// </summary>
private void ComputeContainmentDistance()
{
IList polys0 = PolygonExtracter.GetPolygons(geom[0]);
IList polys1 = PolygonExtracter.GetPolygons(geom[1]);
GeometryLocation[] locPtPoly = new GeometryLocation[2];
// test if either point is wholely inside the other
if (polys1.Count > 0)
{
IList insideLocs0 = ConnectedElementLocationFilter.GetLocations(geom[0]);
ComputeInside(insideLocs0, polys1, locPtPoly);
if (minDistance <= terminateDistance)
{
minDistanceLocation[0] = locPtPoly[0];
minDistanceLocation[1] = locPtPoly[1];
return;
}
}
if (polys0.Count > 0)
{
IList insideLocs1 = ConnectedElementLocationFilter.GetLocations(geom[1]);
ComputeInside(insideLocs1, polys0, locPtPoly);
if (minDistance <= terminateDistance)
{
// flip locations, since we are testing geom 1 VS geom 0
minDistanceLocation[0] = locPtPoly[1];
minDistanceLocation[1] = locPtPoly[0];
return;
}
}
}
private static Geometry GetPolygonLines(Geometry g)
{
var lines = new List <Geometry>();
var lineExtracter = new LinearComponentExtracter(lines);
var polys = PolygonExtracter.GetPolygons(g);
foreach (var poly in polys)
{
poly.Apply(lineExtracter);
}
return(g.Factory.BuildGeometry(polys));
}
private static void InsertPolys(Geometry geom, Quadtree <Geometry> tree)
{
if (geom.IsEmpty)
{
return;
}
var polyList = PolygonExtracter.GetPolygons(geom);
foreach (var poly in polyList)
{
tree.Insert(poly.EnvelopeInternal, poly);
}
}
/// <summary> Computes a <see cref="IGeometry"/> containing only <see cref="IPolygonal"/> components.
/// Extracts the <see cref="IPolygon"/>s from the input
/// and returns them as an appropriate <see cref="IPolygonal"/> geometry.
/// <para/>
/// If the input is already <tt>Polygonal</tt>, it is returned unchanged.
/// <para/>
/// A particular use case is to filter out non-polygonal components
/// returned from an overlay operation.
/// </summary>
/// <param name="g">The geometry to filter</param>
/// <returns>A polygonal geometry</returns>
private static IGeometry RestrictToPolygons(IGeometry g)
{
if (g is IPolygonal)
{
return(g);
}
var polygons = PolygonExtracter.GetPolygons(g);
if (polygons.Count == 1)
{
return /*(IPolygon)*/ (polygons[0]);
}
return(g.Factory.CreateMultiPolygon(GeometryFactory.ToPolygonArray(polygons)));
}
private void Extract(IGeometry geom)
{
if (_geomFact == null)
{
_geomFact = geom.Factory;
}
/*
* PolygonExtracter.getPolygons(geom, polygons);
* LineStringExtracter.getLines(geom, lines);
* PointExtracter.getPoints(geom, points);
*/
_polygons.AddRange(PolygonExtracter.GetPolygons(geom).Cast <IPolygon>());
_lines.AddRange(LinearComponentExtracter.GetLines(geom).Cast <ILineString>());
_points.AddRange(PointExtracter.GetPoints(geom).Cast <IPoint>());
}
private static IGeometry GetPolygonLines(IGeometry g)
{
var lines = new List <IGeometry>();
var lineExtracter = new LinearComponentExtracter(lines);
var polys = PolygonExtracter.GetPolygons(g);
foreach (var poly in polys)
{
poly.Apply(lineExtracter);
}
return(g.Factory.BuildGeometry(polys));
/*
* return g.Factory.BuildGeometry(new List<IGeometry>(
* Gisoft.GeoAPI.DataStructures.Caster.Cast<IGeometry>(polys)));
*/
}
/// <summary> Computes a <see cref="Geometry"/> containing only <see cref="IPolygonal"/> components.
/// Extracts the <see cref="Polygon"/>s from the input
/// and returns them as an appropriate <see cref="IPolygonal"/> geometry.
/// <para/>
/// If the input is already <tt>Polygonal</tt>, it is returned unchanged.
/// <para/>
/// A particular use case is to filter out non-polygonal components
/// returned from an overlay operation.
/// </summary>
/// <param name="g">The geometry to filter</param>
/// <returns>A polygonal geometry</returns>
private static Geometry RestrictToPolygons(Geometry g)
{
if (g is IPolygonal)
{
return(g);
}
var polygons = PolygonExtracter.GetPolygons(g);
if (polygons.Count == 1)
{
return(polygons[0]);
}
var array = GeometryFactory.ToPolygonArray(polygons);
return(g.Factory.CreateMultiPolygon(array));
}
private void LoadClick(object sender, RoutedEventArgs e)
{
var dialog = new OpenFileDialog();
dialog.Filter = "NTS Geometry File|*.nts";
if (dialog.ShowDialog() == true)
{
using (var stream = dialog.OpenFile())
{
var reader = new WKTReader();
try
{
var geom = reader.Read(stream);
if (geom != null && !geom.IsEmpty)
{
var polygons = PolygonExtracter.GetPolygons(geom).OfType <Polygon>().Select(p => new DrawingPolygon(p));
foreach (var polygon in polygons)
{
polygon.Render(DrawingCanvas.DefaultPen);
canvas.AddVisual(polygon);
}
var lineStrings = LineStringExtracter.GetLines(geom).OfType <LineString>().Select(p => new DrawingLineString(p));
foreach (var lineString in lineStrings)
{
lineString.Render(DrawingCanvas.DefaultPen);
canvas.AddVisual(lineString);
}
var points = PointExtracter.GetPoints(geom).OfType <NetTopologySuite.Geometries.Point>()
.Select(p => new DrawingPoint(new System.Windows.Point(p.X, p.Y)));
foreach (var point in points)
{
point.Render(DrawingCanvas.DefaultPen);
canvas.AddVisual(point);
}
}
}
catch
{
MessageBox.Show("Read failed! The file may have been corrupted!");
}
}
}
}
private static List <Polygon> ExtractPolygonsNonEmpty(IEnumerable <Geometry> geoms)
{
var exPolys = new List <Polygon>();
foreach (var geom in geoms)
{
if (!geom.IsEmpty)
{
if (geom is Polygon)
{
exPolys.Add((Polygon)geom);
}
else if (geom is MultiPolygon)
{
exPolys.AddRange(PolygonExtracter.GetPolygons(geom).Cast <Polygon>());
}
}
}
return(exPolys);
}
private static Geometry Overlay(Geometry coll, bool useNG, PrecisionModel pm)
{
var result = new List <Geometry>();
for (int i = 0; i < coll.NumGeometries; i++)
{
var inGeom = coll.GetGeometryN(i);
int size = result.Count;
for (int j = 0; j < size; j++)
{
var resGeom = result[j];
if (resGeom.IsEmpty)
{
continue;
}
var intGeom = ExtractPolygons(OverlayIntersection(resGeom, inGeom, useNG, pm));
if (!intGeom.IsEmpty)
{
result.Add(intGeom);
var resDiff = ExtractPolygons(OverlayDifference(resGeom, intGeom, useNG, pm));
result[j] = resDiff;
inGeom = ExtractPolygons(OverlayDifference(inGeom, intGeom, useNG, pm));
}
}
// keep remainder of input (non-overlapped part)
if (!inGeom.IsEmpty)
{
result.AddRange(PolygonExtracter.GetPolygons(inGeom));
//result.add( inGeom );
}
}
// TODO: return only non-empty polygons
var resultPolys = ExtractPolygonsNonEmpty(result);
return(coll.Factory.BuildGeometry(resultPolys));
}
private static Geometry OverlayIndexed(Geometry coll, bool useNG, PrecisionModel pm)
{
var tree = new Quadtree <Geometry>();
for (int i = 0; i < coll.NumGeometries; i++)
{
var inGeom = coll.GetGeometryN(i);
var results = tree.Query(inGeom.EnvelopeInternal);
foreach (var resPoly in results)
{
var intGeom = ExtractPolygons(OverlayIntersection(resPoly, inGeom, useNG, pm));
var intList = PolygonExtracter.GetPolygons(intGeom);
// resultant is overlapped by next input
if (!intGeom.IsEmpty && intList.Count > 0)
{
tree.Remove(resPoly.EnvelopeInternal, resPoly);
foreach (var intPoly in intList)
{
tree.Insert(intPoly.EnvelopeInternal, intPoly);
var resDiff = OverlayDifference(resPoly, intGeom, useNG, pm);
InsertPolys(resDiff, tree);
inGeom = ExtractPolygons(OverlayDifference(inGeom, intPoly, useNG, pm));
}
}
}
// keep remainder of input
InsertPolys(inGeom, tree);
}
var result = tree.QueryAll();
return(coll.Factory.BuildGeometry(result));
}
private static Geometry ExtractPolygons(Geometry geom)
{
var polys = PolygonExtracter.GetPolygons(geom);
return(geom.Factory.BuildGeometry(polys));
}