/// <summary>
///
/// </summary>
/// <param name="g"></param>
/// <param name="distance"></param>
/// <returns></returns>
public IGeometry Buffer(IGeometry g, double distance)
{
PrecisionModel precisionModel = workingPrecisionModel;
if (precisionModel == null)
{
precisionModel = 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="inputGeom"></param>
/// <param name="distance"></param>
/// <param name="curveBuilder"></param>
public OffsetCurveSetBuilder(IGeometry inputGeom, double distance, OffsetCurveBuilder curveBuilder)
{
this.inputGeom = inputGeom;
this.distance = distance;
this.curveBuilder = curveBuilder;
}