public static Collection <AreaBaseShape> GetSplitResult(this AreaBaseShape polygon, Collection <LineShape> lines)
{
SqlGeometry polygonGeom = SqlGeometry.STGeomFromWKB(new SqlBytes(polygon.GetWellKnownBinary()), 0);
if (!polygonGeom.STIsValid())
{
polygonGeom = polygonGeom.MakeValid();
}
//GeometryLibrary library = BaseShape.GeometryLibrary;
//BaseShape.GeometryLibrary = GeometryLibrary.Unmanaged;
foreach (var item in lines)
{
//MultipolygonShape multipolygon = item.Buffer(0.2, 8, BufferCapType.Square, GeographyUnit.DecimalDegree, DistanceUnit.Meter);
MultipolygonShape multipolygon = SqlTypesGeometryHelper.Buffer(item, 0.2, 8, BufferCapType.Square, GeographyUnit.DecimalDegree, DistanceUnit.Meter);
SqlGeometry multipolygonGeom = SqlGeometry.STGeomFromWKB(new SqlBytes(multipolygon.GetWellKnownBinary()), 0);
if (!multipolygonGeom.STIsValid())
{
multipolygonGeom = multipolygonGeom.MakeValid();
}
polygonGeom = polygonGeom.STDifference(multipolygonGeom);
}
//BaseShape.GeometryLibrary = library;
byte[] bytes = polygonGeom.STAsBinary().Value;
BaseShape shape = BaseShape.CreateShapeFromWellKnownData(bytes) as AreaBaseShape;
MultipolygonShape splittedMultipolygonShape = shape as MultipolygonShape;
PolygonShape splittedPolygonShape = shape as PolygonShape;
if (splittedMultipolygonShape == null && splittedPolygonShape != null)
{
splittedMultipolygonShape = new MultipolygonShape();
splittedMultipolygonShape.Polygons.Add(splittedPolygonShape);
shape = splittedMultipolygonShape;
}
Collection <AreaBaseShape> shapes = new Collection <AreaBaseShape>();
if (splittedMultipolygonShape != null)
{
CloseSplittedPolygons(polygon, splittedMultipolygonShape, lines[0], GeographyUnit.DecimalDegree, DistanceUnit.Meter, .3);
FillShapes(shapes, shape);
}
return(shapes);
}
private void btnDifference_Click(object sender, RoutedEventArgs e)
{
InMemoryFeatureLayer inMemoryLayer = (InMemoryFeatureLayer)mapView.FindFeatureLayer("InMemoryFeatureLayer");
if (inMemoryLayer.InternalFeatures.Count > 1)
{
AreaBaseShape sourceShape = (AreaBaseShape)inMemoryLayer.InternalFeatures["AreaShape2"].GetShape();
AreaBaseShape targetShape = (AreaBaseShape)inMemoryLayer.InternalFeatures["AreaShape1"].GetShape();
AreaBaseShape resultShape = sourceShape.GetDifference(targetShape);
inMemoryLayer.InternalFeatures.Clear();
inMemoryLayer.InternalFeatures.Add("ResultFeature", new Feature(resultShape.GetWellKnownBinary(), "ResultFeature"));
inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillBrush = new GeoSolidBrush(GeoColor.FromArgb(100, GeoColors.Blue));
mapView.Overlays["InmemoryOverlay"].Refresh();
}
}
private void DifferenceButtonClick(object sender, EventArgs e)
{
LayerOverlay inMemoryOverlay = (LayerOverlay)androidMap.Overlays["InMemoryOverlay"];
InMemoryFeatureLayer inMemoryLayer = (InMemoryFeatureLayer)inMemoryOverlay.Layers["InMemoryFeatureLayer"];
if (inMemoryLayer.InternalFeatures.Count > 1)
{
AreaBaseShape sourceShape = (AreaBaseShape)inMemoryLayer.InternalFeatures["AreaShape2"].GetShape();
AreaBaseShape targetShape = (AreaBaseShape)inMemoryLayer.InternalFeatures["AreaShape1"].GetShape();
AreaBaseShape resultShape = sourceShape.GetDifference(targetShape);
inMemoryLayer.InternalFeatures.Clear();
inMemoryLayer.InternalFeatures.Add("ResultFeature", new Feature(resultShape.GetWellKnownBinary(), "ResultFeature"));
inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillSolidBrush.Color = GeoColor.FromArgb(100, GeoColor.StandardColors.Blue);
androidMap.Overlays["InMemoryOverlay"].Refresh();
}
}
public static MultilineShape GetDifference(this LineShape masterLine, AreaBaseShape clippingArea)
{
MultilineShape resultMultiLineShape = new MultilineShape();
var masterGeoLine = SqlGeometry.STGeomFromWKB(new SqlBytes(masterLine.GetWellKnownBinary()), 0);
var clippingGeoArea = SqlGeometry.STGeomFromWKB(new SqlBytes(clippingArea.GetWellKnownBinary()), 0);
var resultWkb = masterGeoLine.STSymDifference(clippingGeoArea).MakeValid().STAsBinary().Value;
var resultFeature = new Feature(resultWkb);
var resultShape = resultFeature.GetShape();
if (resultShape is GeometryCollectionShape)
{
foreach (var line in ((GeometryCollectionShape)resultFeature.GetShape()).Shapes.OfType <LineShape>())
{
resultMultiLineShape.Lines.Add(line);
}
}
else if (resultShape is MultilineShape)
{
foreach (var item in ((MultilineShape)resultShape).Lines)
{
resultMultiLineShape.Lines.Add(item);
}
}
else if (resultShape is LineShape)
{
resultMultiLineShape.Lines.Add((LineShape)resultShape);
}
return(resultMultiLineShape);
}
