How to use

buffer

method

in

com.vividsolutions.jts.geom.Geometry

  private static void WriteNodesInSubGraph(Subgraph subgraph, PrintWriter islandLog, boolean hadRemoved){
    Geometry convexHullGeom = subgraph.getConvexHull();
    if (convexHullGeom != null && !(convexHullGeom instanceof Polygon)) {
      convexHullGeom = convexHullGeom.buffer(0.0001,5);
    }
    islandLog.printf("%d\t%d\t%d\t%s\t%b\n", islandCounter, subgraph.stopSize(), 
        subgraph.streetSize(), convexHullGeom, hadRemoved);
    islandCounter++;
  }
}

Geometry point = geomf.createPoint(vertexSeconds.getKey().getCoordinate());
point = JTS.transform(point, toMeters);
Geometry buffer = point.buffer(remainingMeters);
bufferLists.put(thresholdSeconds, buffer);

  geom = geom.buffer(0.01); // ~10 meters
} else if (geom instanceof Point) {
  geom = geom.buffer(0.05); // ~50 meters, so that it shows up

/**
 * The function is run periodically by the update manager.
 * The extending class should provide the getNote method. It is not implemented here
 * as the requirements for different updaters can be vastly different dependent on the data source.
 */
@Override
protected void runPolling() throws IOException{
  LOG.info("Run WFS polling updater with hashcode: {}", this.hashCode());
  notesForEdge = HashMultimap.create();
  uniqueMatchers = new HashMap<>();
  FeatureIterator<SimpleFeature> features = featureSource.getFeatures(query).features();
  while ( features.hasNext()){
    SimpleFeature feature = features.next();
    if (feature.getDefaultGeometry() == null) continue;
    Alert alert = getNote(feature);
    if (alert == null) continue;
    Geometry geom = (Geometry) feature.getDefaultGeometry();
    Geometry searchArea = geom.buffer(SEARCH_RADIUS_DEG);
    Collection<Edge> edges = graph.streetIndex.getEdgesForEnvelope(searchArea.getEnvelopeInternal());
    for(Edge edge: edges){
      if (edge instanceof StreetEdge && !searchArea.disjoint(edge.getGeometry())) {
        addNote(edge, alert, NOTE_MATCHER);
      }
    }
  }
  updaterManager.execute(new WFSGraphWriter());
}

  /**
   * Creates a valid area geometry from one that possibly has bad topology
   * (i.e. self-intersections). Since buffer can handle invalid topology, but
   * always returns valid geometry, constructing a 0-width buffer "corrects"
   * the topology. Note this only works for area geometries, since buffer
   * always returns areas. This also may return empty geometries, if the input
   * has no actual area.
   * 
   * @param roughAreaGeom
   *          an area geometry possibly containing self-intersections
   * @return a valid area geometry
   */
  private Geometry createValidArea(Geometry roughAreaGeom) {
    return roughAreaGeom.buffer(0.0);
  }
}

 /**
  * Creates a valid area geometry from one that possibly has
  * bad topology (i.e. self-intersections).
  * Since buffer can handle invalid topology, but always returns
  * valid geometry, constructing a 0-width buffer "corrects" the
  * topology.
  * Note this only works for area geometries, since buffer always returns
  * areas.  This also may return empty geometries, if the input
  * has no actual area.
  *
  * @param rawAreaGeom an area geometry possibly containing self-intersections
  * @return a valid area geometry
  */
 private Geometry createValidArea(Geometry rawAreaGeom)
 {
   if ( isEnsureValidTopology)
     return rawAreaGeom.buffer(0.0);
   return rawAreaGeom;
 }
}

static Geometry createCircle(Coordinate centre, double radius)
{
  Geometry centrePt = geomFact.createPoint(centre);
  return centrePt.buffer(radius, POLYGON_SIZE);
}

static Geometry createCircle()
{
  Geometry centrePt = geomFact.createPoint(new Coordinate(0.5, 0.5));
  return centrePt.buffer(0.5, 20);
}
 

private Geometry bufferUnion(List geoms)
{
  GeometryFactory factory = ((Geometry) geoms.get(0)).getFactory();
  Geometry gColl = factory.buildGeometry(geoms);
  Geometry unionAll = gColl.buffer(0.0);
 return unionAll;
}
 

public static void unionUsingBuffer(Geometry[] geom)
{
 GeometryFactory fact = geom[0].getFactory();
 Geometry geomColl = fact.createGeometryCollection(geom);
 Geometry union = geomColl.buffer(0.0);
 System.out.println(union);
}

private Geometry bufferUnion(Geometry g0, Geometry g1)
{
  GeometryFactory factory = g0.getFactory();
  Geometry gColl = factory.createGeometryCollection(new Geometry[] { g0, g1 } );
  Geometry unionAll = gColl.buffer(0.0);
 return unionAll;
}

/**
 * Computes the buffer a geometry,
 * using enhanced precision.
 * @param geom0 the Geometry to buffer
 * @param distance the buffer distance
 * @return the Geometry representing the buffer of the input Geometry.
 */
public Geometry buffer(Geometry geom0, double distance)
{
 Geometry geom = removeCommonBits(geom0);
 return computeResultPrecision(geom.buffer(distance));
}

private Geometry bufferUnion(Geometry g0, Geometry g1)
{
  GeometryFactory factory = g0.getFactory();
  Geometry gColl = factory.createGeometryCollection(new Geometry[] { g0, g1 } );
  Geometry unionAll = gColl.buffer(0.0);
 return unionAll;
}
 

private Geometry fixPolygonalTopology(Geometry geom)
{
  /**
   * If precision model was *not* changed, need to flip
   * geometry to targetPM, buffer in that model, then flip back
   */
  Geometry geomToBuffer = geom;
  if (! changePrecisionModel) {
    geomToBuffer = changePM(geom, targetPM);
  }
  
  Geometry bufGeom = geomToBuffer.buffer(0);
  
  Geometry finalGeom = bufGeom;
  if (! changePrecisionModel) {
   // a slick way to copy the geometry with the original precision factory
    finalGeom = geom.getFactory().createGeometry(bufGeom);
  }
  return finalGeom;
}
 

/**
 * Snaps the vertices in the component {@link LineString}s
 * of the source geometry
 * to the vertices of the given snap geometry.
 *
 *@param snapTolerance the snapping tolerance
 *@param cleanResult whether the result should be made valid
 * @return a new snapped Geometry
 */
public Geometry snapToSelf(double snapTolerance, boolean cleanResult)
{
 Coordinate[] snapPts = extractTargetCoordinates(srcGeom);
 SnapTransformer snapTrans = new SnapTransformer(snapTolerance, snapPts, true);
 Geometry snappedGeom = snapTrans.transform(srcGeom);
 Geometry result = snappedGeom;
 if (cleanResult && result instanceof Polygonal) {
  // TODO: use better cleaning approach
  result = snappedGeom.buffer(0);
 }
 return result;
}

Geometry result = geom.buffer(distance);
return result;

static public Geometry buffer(Geometry arg0,double arg1)
{
   Geometry _this = arg0;
   return _this.buffer(arg1);
}

static public Geometry bufferWithSegments(Geometry arg0, Double arg1, Integer arg2)
{
   if (arg0 == null || arg1 == null || arg2 == null) return null;
   Geometry _this = arg0;
   return _this.buffer(arg1,arg2);
}

static Geometry createCircle(Coordinate centre, double radius)
{
  Geometry centrePt = geomFact.createPoint(centre);
  return centrePt.buffer(radius, POLYGON_SIZE);
}

static Geometry createCircle()
{
  Geometry centrePt = geomFact.createPoint(new Coordinate(0.5, 0.5));
  return centrePt.buffer(0.5, 20);
}