private FeatureCollection convexHhull(TaskMonitor monitor, FeatureCollection fc) { monitor.allowCancellationRequests(); monitor.report(I18N.get("ui.plugin.analysis.ConvexHullPlugIn.Computing-Convex-Hull") + "..."); int size = fc.size(); GeometryFactory geomFact = null; if (size == 0) { return null; } int count = 0; Geometry[] geoms = new Geometry[size]; for (Iterator i = fc.iterator(); i.hasNext(); ) { Feature f = (Feature) i.next(); Geometry geom = f.getGeometry(); if (geom == null) { continue; } if (geomFact == null) { geomFact = geom.getFactory(); } geoms[count++] = geom; } GeometryCollection gc = geomFact.createGeometryCollection(geoms); Geometry hull = gc.convexHull(); List hullList = new ArrayList(); hullList.add(hull); return FeatureDatasetFactory.createFromGeometry(hullList); }
public Geometry buffer(Geometry g, double distance) { PrecisionModel precisionModel = workingPrecisionModel; if (precisionModel == null) precisionModel = g.getPrecisionModel(); // factory must be the same as the one used by the input geomFact = g.getFactory(); OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, bufParams); OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder); List bufferSegStrList = curveSetBuilder.getCurves(); // short-circuit test if (bufferSegStrList.size() <= 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.getEdges()); List subgraphList = createSubgraphs(graph); PolygonBuilder polyBuilder = new PolygonBuilder(geomFact); buildSubgraphs(subgraphList, polyBuilder); List resultPolyList = polyBuilder.getPolygons(); // just in case... if (resultPolyList.size() <= 0) { return createEmptyResultGeometry(); } Geometry resultGeom = geomFact.buildGeometry(resultPolyList); return resultGeom; }
public final Geometry transform(Geometry inputGeom) { this.inputGeom = inputGeom; this.factory = inputGeom.getFactory(); if (inputGeom instanceof Point) return transformPoint((Point) inputGeom, null); if (inputGeom instanceof MultiPoint) return transformMultiPoint((MultiPoint) inputGeom, null); if (inputGeom instanceof LinearRing) return transformLinearRing((LinearRing) inputGeom, null); if (inputGeom instanceof LineString) return transformLineString((LineString) inputGeom, null); if (inputGeom instanceof MultiLineString) return transformMultiLineString((MultiLineString) inputGeom, null); if (inputGeom instanceof Polygon) return transformPolygon((Polygon) inputGeom, null); if (inputGeom instanceof MultiPolygon) return transformMultiPolygon((MultiPolygon) inputGeom, null); if (inputGeom instanceof GeometryCollection) return transformGeometryCollection((GeometryCollection) inputGeom, null); throw new IllegalArgumentException( "Unknown Geometry subtype: " + inputGeom.getClass().getName()); }
private Geometry editInternal(Geometry geometry, GeometryEditorOperation operation) { // if client did not supply a GeometryFactory, use the one from the input Geometry if (factory == null) factory = geometry.getFactory(); if (geometry instanceof GeometryCollection) { return editGeometryCollection((GeometryCollection) geometry, operation); } if (geometry instanceof Polygon) { return editPolygon((Polygon) geometry, operation); } if (geometry instanceof Point) { return operation.edit(geometry, factory); } if (geometry instanceof LineString) { return operation.edit(geometry, factory); } Assert.shouldNeverReachHere("Unsupported Geometry class: " + geometry.getClass().getName()); return null; }
public static Geometry replace(Geometry parent, Geometry original, Geometry replacement) { List elem = extractElements(parent, false); Collections.replaceAll(elem, original, replacement); return parent.getFactory().buildGeometry(elem); }
public static Point createPointFromInternalCoord(Coordinate coord, Geometry exemplar) { exemplar.getPrecisionModel().makePrecise(coord); return exemplar.getFactory().createPoint(coord); }