/// <summary>
///
/// </summary>
/// <param name="g"></param>
/// <param name="distance"></param>
/// <returns></returns>
public IGeometry Buffer(IGeometry g, double distance)
{
PrecisionModel precisionModel = _workingPrecisionModel ?? new PrecisionModel(g.PrecisionModel);
// factory must be the same as the one used by the input
_geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, _quadrantSegments);
curveBuilder.EndCapStyle = _endCapStyle;
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
IList bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
IGeometry emptyGeom = _geomFact.CreateGeometryCollection(new Geometry[0]);
return(emptyGeom);
}
ComputeNodedEdges(bufferSegStrList, precisionModel);
_graph = new PlanarGraph(new OverlayNodeFactory());
_graph.AddEdges(_edgeList.Edges);
IList subgraphList = CreateSubgraphs(_graph);
PolygonBuilder polyBuilder = new PolygonBuilder(_geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
IList resultPolyList = polyBuilder.Polygons;
IGeometry resultGeom = _geomFact.BuildGeometry(resultPolyList);
return(resultGeom);
}
/// <summary>
///
/// </summary>
/// <param name="g"></param>
/// <param name="distance"></param>
/// <returns></returns>
public IGeometry Buffer(IGeometry g, double distance)
{
PrecisionModel precisionModel = _workingPrecisionModel ?? new PrecisionModel(g.PrecisionModel);
// factory must be the same as the one used by the input
_geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, _quadrantSegments);
curveBuilder.EndCapStyle = _endCapStyle;
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
IList bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
IGeometry emptyGeom = _geomFact.CreateGeometryCollection(new Geometry[0]);
return emptyGeom;
}
ComputeNodedEdges(bufferSegStrList, precisionModel);
_graph = new PlanarGraph(new OverlayNodeFactory());
_graph.AddEdges(_edgeList.Edges);
IList subgraphList = CreateSubgraphs(_graph);
PolygonBuilder polyBuilder = new PolygonBuilder(_geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
IList resultPolyList = polyBuilder.Polygons;
IGeometry resultGeom = _geomFact.BuildGeometry(resultPolyList);
return resultGeom;
}