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LUCENE-7955: Add tests for nearest path distance, degenerate path.

This commit is contained in:
Karl Wright 2017-09-15 02:20:11 -04:00
parent 8cb64ed926
commit ab965d506c
1 changed files with 73 additions and 0 deletions
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73
lucene/spatial3d/src/test/org/apache/lucene/spatial3d/geom/GeoPathTest.java
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@ -304,4 +304,77 @@ public class GeoPathTest {
assertTrue(solid.isWithin(point));
}
@Test
public void testInterpolation() {
final double lat = 52.51607;
final double lon = 13.37698;
final double[] pathLats = new double[] {52.5355,52.54,52.5626,52.5665,52.6007,52.6135,52.6303,52.6651,52.7074};
final double[] pathLons = new double[] {13.3634,13.3704,13.3307,13.3076,13.2806,13.2484,13.2406,13.241,13.1926};
// Set up a point in the right way
final GeoPoint carPoint = new GeoPoint(PlanetModel.SPHERE, toRadians(lat), toRadians(lon));
// Create the path, but use a tiny width (e.g. zero)
final GeoPoint[] pathPoints = new GeoPoint[pathLats.length];
for (int i = 0; i < pathPoints.length; i++) {
pathPoints[i] = new GeoPoint(PlanetModel.SPHERE, toRadians(pathLats[i]), toRadians(pathLons[i]));
}
// Construct a path with no width
final GeoPath thisPath = GeoPathFactory.makeGeoPath(PlanetModel.SPHERE, 0.0, pathPoints);
// Construct a path with a width
final GeoPath legacyPath = GeoPathFactory.makeGeoPath(PlanetModel.SPHERE, 1e-6, pathPoints);
// Compute the inside distance to the atPoint using zero-width path
final double distance = thisPath.computeNearestDistance(DistanceStyle.ARC, carPoint);
// Compute the inside distance using legacy path
final double legacyDistance = legacyPath.computeNearestDistance(DistanceStyle.ARC, carPoint);
// Compute the inside distance using the legacy formula
final double oldFormulaDistance = thisPath.computeDistance(DistanceStyle.ARC, carPoint);
// Compute the inside distance using the legacy formula with the legacy shape
final double oldFormulaLegacyDistance = legacyPath.computeDistance(DistanceStyle.ARC, carPoint);
// These should be about the same
assertEquals(legacyDistance, distance, 1e-12);
assertEquals(oldFormulaLegacyDistance, oldFormulaDistance, 1e-12);
// This isn't true because example search center is off of the path.
//assertEquals(oldFormulaDistance, distance, 1e-12);
}
@Test
public void testInterpolation2() {
final double lat = 52.5665;
final double lon = 13.3076;
final double[] pathLats = new double[] {52.5355,52.54,52.5626,52.5665,52.6007,52.6135,52.6303,52.6651,52.7074};
final double[] pathLons = new double[] {13.3634,13.3704,13.3307,13.3076,13.2806,13.2484,13.2406,13.241,13.1926};
final GeoPoint carPoint = new GeoPoint(PlanetModel.SPHERE, toRadians(lat), toRadians(lon));
final GeoPoint[] pathPoints = new GeoPoint[pathLats.length];
for (int i = 0; i < pathPoints.length; i++) {
pathPoints[i] = new GeoPoint(PlanetModel.SPHERE, toRadians(pathLats[i]), toRadians(pathLons[i]));
}
// Construct a path with no width
final GeoPath thisPath = GeoPathFactory.makeGeoPath(PlanetModel.SPHERE, 0.0, pathPoints);
// Construct a path with a width
final GeoPath legacyPath = GeoPathFactory.makeGeoPath(PlanetModel.SPHERE, 1e-6, pathPoints);
// Compute the inside distance to the atPoint using zero-width path
final double distance = thisPath.computeNearestDistance(DistanceStyle.ARC, carPoint);
// Compute the inside distance using legacy path
final double legacyDistance = legacyPath.computeNearestDistance(DistanceStyle.ARC, carPoint);
// Compute the inside distance using the legacy formula
final double oldFormulaDistance = thisPath.computeDistance(DistanceStyle.ARC, carPoint);
// Compute the inside distance using the legacy formula with the legacy shape
final double oldFormulaLegacyDistance = legacyPath.computeDistance(DistanceStyle.ARC, carPoint);
// These should be about the same
assertEquals(legacyDistance, distance, 1e-12);
assertEquals(oldFormulaLegacyDistance, oldFormulaDistance, 1e-12);
// Since the point we picked is actually on the path, this should also be true
assertEquals(oldFormulaDistance, distance, 1e-12);
}
}