public static Geometry minimumCircle(Geometry g) { if (g == null) return null; MinimumBoundingCircle circle = new MinimumBoundingCircle(g); return circle.getCircle(); }
/** * Computes the bounding circle * * @param geometry * @return */ public static Geometry computeBoundingCircle(Geometry geometry) { if (geometry == null) { return null; } return new MinimumBoundingCircle(geometry).getCircle(); } }
public static Geometry farthestPoints(Geometry g) { return ((new MinimumBoundingCircle(g)).getFarthestPoints()); } public static double maximumDiameterLength(Geometry g) { return 2 * (new MinimumBoundingCircle(g)).getRadius(); }
public static Geometry minimumBoundingCircle(Geometry g) { return (new MinimumBoundingCircle(g)).getCircle(); } public static Geometry maximumDiameter(Geometry g) { return
public static double maximumDiameterLength(Geometry g) { return 2 * (new MinimumBoundingCircle(g)).getRadius(); }
public static Geometry maximumDiameter(Geometry g) { return g.getFactory().createLineString((new MinimumBoundingCircle(g)).getExtremalPoints()); } public static Geometry farthestPoints(Geometry g) {
/** Test of evaluate method, of class FilterFunction_minimumCircle. */ @Test public void testEvaluate() throws Exception { SimpleFeatureCollection featureCollection = FunctionTestFixture.polygons(); // Test the Function FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2(GeoTools.getDefaultHints()); Function exp = ff.function("mincircle", ff.property("geom")); SimpleFeatureIterator iter = featureCollection.features(); while (iter.hasNext()) { SimpleFeature feature = iter.next(); Geometry geom = (Geometry) feature.getDefaultGeometry(); Geometry circle = new MinimumBoundingCircle(geom).getCircle(); Object value = exp.evaluate(feature); assertTrue(value instanceof Polygon); assertTrue(circle.equals((Geometry) value)); } iter.close(); // Check for null safeness assertNull(exp.evaluate(null)); } }
/** * Compute the minimum bounding circle center of a geometry * @param geometry Any geometry * @return Minimum bounding circle center point */ public static Point getCircumCenter(Geometry geometry) { if(geometry == null || geometry.getNumPoints() == 0) { return null; } return geometry.getFactory().createPoint(new MinimumBoundingCircle(geometry).getCentre()); } }
void run(int nPts) { Coordinate[] randPts = createRandomPoints(nPts); Geometry mp = geomFact.createMultiPoint(randPts); MinimumBoundingCircle mbc = new MinimumBoundingCircle(mp); Coordinate centre = mbc.getCentre(); double radius = mbc.getRadius(); System.out.println("Testing " + nPts + " random points. Radius = " + radius); checkWithinCircle(randPts, centre, radius, 0.0001); }
private void doMinimumBoundingCircleTest(String wkt, String expectedWKT, Coordinate expectedCentre, double expectedRadius) throws ParseException { MinimumBoundingCircle mbc = new MinimumBoundingCircle(reader.read(wkt)); Coordinate[] exPts = mbc.getExtremalPoints(); Geometry actual = geometryFactory.createMultiPoint(exPts); double actualRadius = mbc.getRadius(); Coordinate actualCentre = mbc.getCentre(); //System.out.println( // " Centre = " + actualCentre // + " Radius = " + actualRadius); Geometry expected = reader.read(expectedWKT); boolean isEqual = actual.equals(expected); // need this hack because apparently equals does not work for MULTIPOINT EMPTY if (actual.isEmpty() && expected.isEmpty()) isEqual = true; if (!isEqual) { System.out.println("Actual = " + actual + ", Expected = " + expected); } assertTrue(isEqual); if (expectedCentre != null) { assertTrue(expectedCentre.distance(actualCentre) < TOLERANCE); } if (expectedRadius >= 0) { assertTrue(Math.abs(expectedRadius - actualRadius) < TOLERANCE); } }