public IGeometry Buffer(IGeometry g, double distance)
{
IPrecisionModel precisionModel = _workingPrecisionModel;
if (precisionModel == null)
{
precisionModel = g.PrecisionModel;
}
// factory must be the same as the one used by the input
_geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, _bufParams);
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
var bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
return(CreateEmptyResultGeometry());
}
//BufferDebug.runCount++;
//String filename = "run" + BufferDebug.runCount + "_curves";
//System.out.println("saving " + filename);
//BufferDebug.saveEdges(bufferEdgeList, filename);
// DEBUGGING ONLY
//WKTWriter wktWriter = new WKTWriter();
//Debug.println("Rings: " + wktWriter.write(convertSegStrings(bufferSegStrList.iterator())));
//wktWriter.setMaxCoordinatesPerLine(10);
//System.out.println(wktWriter.writeFormatted(convertSegStrings(bufferSegStrList.iterator())));
ComputeNodedEdges(bufferSegStrList, precisionModel);
_graph = new PlanarGraph(new OverlayNodeFactory());
_graph.AddEdges(_edgeList.Edges);
IEnumerable <BufferSubgraph> subgraphList = CreateSubgraphs(_graph);
PolygonBuilder polyBuilder = new PolygonBuilder(_geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
var resultPolyList = polyBuilder.Polygons;
// just in case...
if (resultPolyList.Count <= 0)
{
return(CreateEmptyResultGeometry());
}
IGeometry resultGeom = _geomFact.BuildGeometry(resultPolyList);
return(resultGeom);
}
private static IGeometry BuildCurveSet(IGeometry g, double dist, IBufferParameters bufParams)
{
// --- now construct curve
var ocb = new OffsetCurveBuilder(g.Factory.PrecisionModel, bufParams);
var ocsb = new OffsetCurveSetBuilder(g, dist, ocb);
var curves = ocsb.GetCurves();
var lines = new List<IGeometry>();
foreach (var ss in curves)
{
var pts = ss.Coordinates;
lines.Add(g.Factory.CreateLineString(pts));
}
IGeometry curve = g.Factory.BuildGeometry(lines);
return curve;
}
public IGeometry Buffer(IGeometry g, double distance)
{
IPrecisionModel precisionModel = _workingPrecisionModel;
if (precisionModel == null)
{
precisionModel = g.PrecisionModel;
}
// factory must be the same as the one used by the input
_geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, _bufParams);
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
var bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
return(CreateEmptyResultGeometry());
}
ComputeNodedEdges(bufferSegStrList, precisionModel);
_graph = new PlanarGraph(new OverlayNodeFactory());
_graph.AddEdges(_edgeList.Edges);
IEnumerable <BufferSubgraph> subgraphList = CreateSubgraphs(_graph);
PolygonBuilder polyBuilder = new PolygonBuilder(_geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
var resultPolyList = polyBuilder.Polygons;
// just in case...
if (resultPolyList.Count <= 0)
{
return(CreateEmptyResultGeometry());
}
IGeometry resultGeom = _geomFact.BuildGeometry(resultPolyList);
return(resultGeom);
}
public void Buffer3()
{
var geometry = reader.Read(
@"LINESTRING(1250.7665 446.9385,1137.8786 170.4488,1136.3666106287267
166.74557327980631,1139.485009866369 125.36515638486206,1137.8786 121.7019)");
Assert.IsNotNull(geometry);
Assert.IsTrue(geometry.IsValid);
BufferParameters parameters = new BufferParameters() {EndCapStyle = EndCapStyle.Round};
var curveBuilder = new OffsetCurveBuilder(
geometry.PrecisionModel, parameters);
var curveSetBuilder = new OffsetCurveSetBuilder(geometry, 5, curveBuilder);
var bufferSegStrList = curveSetBuilder.GetCurves();
Assert.AreEqual(1, bufferSegStrList.Count);
var segmentString = (NodedSegmentString) bufferSegStrList[0];
Assert.AreEqual(45, segmentString.Count);
for (var i = 0; i < segmentString.Coordinates.Length; i++)
{
var coord = segmentString.Coordinates[i];
Debug.WriteLine(String.Format("{1:R} {2:R}", i, coord.X, coord.Y));
}
}
public IGeometry Buffer(IGeometry g, double distance)
{
IPrecisionModel precisionModel = _workingPrecisionModel;
if (precisionModel == null)
precisionModel = g.PrecisionModel;
// factory must be the same as the one used by the input
_geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, _bufParams);
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
var bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
return CreateEmptyResultGeometry();
}
ComputeNodedEdges(bufferSegStrList, precisionModel);
_graph = new PlanarGraph(new OverlayNodeFactory());
_graph.AddEdges(_edgeList.Edges);
IEnumerable<BufferSubgraph> subgraphList = CreateSubgraphs(_graph);
PolygonBuilder polyBuilder = new PolygonBuilder(_geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
var resultPolyList = polyBuilder.Polygons;
// just in case...
if (resultPolyList.Count <= 0)
{
return CreateEmptyResultGeometry();
}
IGeometry resultGeom = _geomFact.BuildGeometry(resultPolyList);
return resultGeom;
}
public IGeometry Buffer(IGeometry g, double distance)
{
IPrecisionModel precisionModel = _workingPrecisionModel;
if (precisionModel == null)
precisionModel = g.PrecisionModel;
// factory must be the same as the one used by the input
_geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, _bufParams);
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
var bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
return CreateEmptyResultGeometry();
}
//BufferDebug.runCount++;
//String filename = "run" + BufferDebug.runCount + "_curves";
//System.out.println("saving " + filename);
//BufferDebug.saveEdges(bufferEdgeList, filename);
// DEBUGGING ONLY
//WKTWriter wktWriter = new WKTWriter();
//Debug.println("Rings: " + wktWriter.write(convertSegStrings(bufferSegStrList.iterator())));
//wktWriter.setMaxCoordinatesPerLine(10);
//System.out.println(wktWriter.writeFormatted(convertSegStrings(bufferSegStrList.iterator())));
ComputeNodedEdges(bufferSegStrList, precisionModel);
_graph = new PlanarGraph(new OverlayNodeFactory());
_graph.AddEdges(_edgeList.Edges);
IEnumerable<BufferSubgraph> subgraphList = CreateSubgraphs(_graph);
PolygonBuilder polyBuilder = new PolygonBuilder(_geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
var resultPolyList = polyBuilder.Polygons;
// just in case...
if (resultPolyList.Count <= 0)
{
return CreateEmptyResultGeometry();
}
IGeometry resultGeom = _geomFact.BuildGeometry(resultPolyList);
return resultGeom;
}