/// <summary>
/// Creates a builder for linear elements which may be present
/// in the overlay result.
/// </summary>
/// <param name="inputGeom">The input geometries</param>
/// <param name="graph">The topology graph</param>
/// <param name="hasResultArea"><c>true</c> if an area has been generated for the result</param>
/// <param name="opCode">The overlay operation code</param>
/// <param name="geomFact">The output geometry factory</param>
public LineBuilder(InputGeometry inputGeom, OverlayGraph graph, bool hasResultArea, SpatialFunction opCode, GeometryFactory geomFact)
{
_graph = graph;
_opCode = opCode;
_geometryFactory = geomFact;
_hasResultArea = hasResultArea;
_inputAreaIndex = inputGeom.GetAreaIndex();
}
internal static Geometry ToLines(OverlayGraph graph, bool isOutputEdges, GeometryFactory geomFact)
{
var lines = new List <LineString>();
foreach (var edge in graph.Edges)
{
bool includeEdge = isOutputEdges || edge.IsInResultArea;
if (!includeEdge)
{
continue;
}
//Coordinate[] pts = getCoords(nss);
var pts = edge.CoordinatesOriented;
var line = geomFact.CreateLineString(pts);
line.UserData = LabelForResult(edge);
lines.Add(line);
}
return(geomFact.BuildGeometry(lines));
}
public IntersectionPointBuilder(OverlayGraph graph,
GeometryFactory geomFact)
{
_graph = graph;
_geometryFactory = geomFact;
}
public OverlayLabeller(OverlayGraph graph, InputGeometry inputGeometry)
{
_graph = graph;
_inputGeometry = inputGeometry;
_edges = graph.Edges;
}