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Commit 875fb674 authored by Luc Maisonobe's avatar Luc Maisonobe
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Added tests for BasicScanAlgorithm.

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rugged-core/src/main/java/org/orekit/rugged/core/BasicScanAlgorithm.java
+ 6
− 6
View file @ 875fb674
......@@ -58,8 +58,8 @@ public class BasicScanAlgorithm implements IntersectionAlgorithm {
@Override
public void setUpTilesManagement(final TileUpdater updater, final int maxCachedTiles) {
cache = new TilesCache<SimpleTile>(new SimpleTileFactory(), updater, maxCachedTiles);
hMin = 0;
hMax = 0;
hMin = Double.POSITIVE_INFINITY;
hMax = Double.NEGATIVE_INFINITY;
}
/** {@inheritDoc} */
......@@ -81,12 +81,12 @@ public class BasicScanAlgorithm implements IntersectionAlgorithm {
scannedTiles.clear();
// compute entry and exit points
entryPoint = ellipsoid.transform(ellipsoid.pointAtAltitude(position, los, hMin),
entryPoint = ellipsoid.transform(ellipsoid.pointAtAltitude(position, los, Double.isInfinite(hMin) ? 0.0 : hMin),
ellipsoid.getBodyFrame(), null);
final SimpleTile entryTile = cache.getTile(entryPoint.getLatitude(), entryPoint.getLongitude());
addIfNotPresent(scannedTiles, entryTile);
exitPoint = ellipsoid.transform(ellipsoid.pointAtAltitude(position, los, hMax),
exitPoint = ellipsoid.transform(ellipsoid.pointAtAltitude(position, los, Double.isInfinite(hMax) ? 0.0 : hMax),
ellipsoid.getBodyFrame(), null);
final SimpleTile exitTile = cache.getTile(exitPoint.getLatitude(), exitPoint.getLongitude());
addIfNotPresent(scannedTiles, entryTile);
......@@ -120,7 +120,7 @@ public class BasicScanAlgorithm implements IntersectionAlgorithm {
for (int j = longitudeIndex(tile, minLongitude); j < longitudeIndex(tile, maxLongitude); ++j) {
GeodeticPoint gp = tile.pixelIntersection(entryPoint, exitPoint, i, j);
if (gp != null) {
final Vector3D point = ellipsoid.transform(intersectionGP);
final Vector3D point = ellipsoid.transform(gp);
final double dot = Vector3D.dotProduct(point.subtract(position), los);
if (dot < intersectionDot) {
intersectionGP = gp;
......@@ -156,7 +156,7 @@ public class BasicScanAlgorithm implements IntersectionAlgorithm {
}
// check maximum altitude
if (tile.getMaxElevation() < hMax) {
if (tile.getMaxElevation() > hMax) {
hMax = tile.getMaxElevation();
changedMinMax = true;
}
......
rugged-core/src/test/java/org/orekit/rugged/core/BasicScanAlgorithmTest.java 0 → 100644
+ 221
− 0
View file @ 875fb674
/* Copyright 2002-2014 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.rugged.core;
import java.io.File;
import java.net.URISyntaxException;
import org.apache.commons.math3.geometry.euclidean.threed.Rotation;
import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
import org.apache.commons.math3.util.FastMath;
import org.junit.Assert;
import org.junit.Test;
import org.orekit.attitudes.Attitude;
import org.orekit.bodies.GeodeticPoint;
import org.orekit.data.DataProvidersManager;
import org.orekit.data.DirectoryCrawler;
import org.orekit.errors.OrekitException;
import org.orekit.frames.FramesFactory;
import org.orekit.frames.Transform;
import org.orekit.orbits.CartesianOrbit;
import org.orekit.propagation.SpacecraftState;
import org.orekit.rugged.api.RuggedException;
import org.orekit.rugged.api.TileUpdater;
import org.orekit.rugged.core.ExtendedEllipsoid;
import org.orekit.rugged.core.raster.CliffsElevationUpdater;
import org.orekit.rugged.core.raster.SimpleTile;
import org.orekit.rugged.core.raster.SimpleTileFactory;
import org.orekit.rugged.core.raster.VolcanicConeElevationUpdater;
import org.orekit.time.AbsoluteDate;
import org.orekit.time.TimeScalesFactory;
import org.orekit.utils.Constants;
import org.orekit.utils.IERSConventions;
import org.orekit.utils.PVCoordinates;
public class BasicScanAlgorithmTest {
@Test
public void testMayonVolcano()
throws RuggedException, OrekitException, URISyntaxException {
String path = getClass().getClassLoader().getResource("orekit-data").toURI().getPath();
DataProvidersManager.getInstance().addProvider(new DirectoryCrawler(new File(path)));
ExtendedEllipsoid earth = new ExtendedEllipsoid(Constants.WGS84_EARTH_EQUATORIAL_RADIUS,
Constants.WGS84_EARTH_FLATTENING,
FramesFactory.getITRF(IERSConventions.IERS_2010, true));
// Mayon Volcano location according to Wikipedia: 13°15′24″N 123°41′6″E
GeodeticPoint summit =
new GeodeticPoint(FastMath.toRadians(13.25667), FastMath.toRadians(123.685), 2463.0);
TileUpdater updater = new VolcanicConeElevationUpdater(summit,
FastMath.toRadians(30.0), 16.0,
FastMath.toRadians(1.0), 1201);
// test point approximately 1.6km North-North-West and 800 meters below volcano summit
double latitude = FastMath.toRadians(13.27);
double longitude = FastMath.toRadians(123.68);
SimpleTile tile = new SimpleTileFactory().createTile();
updater.updateTile(latitude, longitude, tile);
double altitude = tile.interpolateElevation(latitude, longitude);
GeodeticPoint groundGP = new GeodeticPoint(latitude, longitude, altitude);
Vector3D groundP = earth.transform(groundGP);
BasicScanAlgorithm basicScan = new BasicScanAlgorithm();
basicScan.setUpTilesManagement(updater, 8);
// some orbital parameters have been computed using Orekit
// tutorial about phasing, using the following configuration:
//
// orbit.date = 2012-01-01T00:00:00.000
// phasing.orbits.number = 143
// phasing.days.number = 10
// sun.synchronous.reference.latitude = 0
// sun.synchronous.reference.ascending = false
// sun.synchronous.mean.solar.time = 10:30:00
// gravity.field.degree = 12
// gravity.field.order = 12
//
// the resulting phased orbit has then been propagated to a date corresponding
// to test point lying in the spacecraft (YZ) plane (with nadir pointing and yaw compensation)
AbsoluteDate crossing = new AbsoluteDate("2012-01-06T02:27:15.942757185", TimeScalesFactory.getUTC());
SpacecraftState state =
new SpacecraftState(new CartesianOrbit(new PVCoordinates(new Vector3D( -649500.423763743,
-6943715.537565755,
1657929.137063380),
new Vector3D(-1305.453711368668,
-1600.627551928136,
-7167.286855869801)),
FramesFactory.getEME2000(),
crossing,
Constants.EIGEN5C_EARTH_MU),
new Attitude(crossing,
FramesFactory.getEME2000(),
new Rotation(-0.40904880353552850,
0.46125295378582530,
-0.63525007056319790,
-0.46516893361386025,
true),
new Vector3D(-7.048568391860185e-05,
-1.043582650222194e-03,
1.700400341147713e-05)));
// preliminary check: the point has been chosen in the spacecraft (YZ) plane
Transform earthToSpacecraft = new Transform(state.getDate(),
earth.getBodyFrame().getTransformTo(state.getFrame(), state.getDate()),
state.toTransform());
Vector3D pointInSpacecraftFrame = earthToSpacecraft.transformPosition(groundP);
Assert.assertEquals( 0.000, pointInSpacecraftFrame.getX(), 1.0e-3);
Assert.assertEquals(-87754.914, pointInSpacecraftFrame.getY(), 1.0e-3);
Assert.assertEquals(790330.254, pointInSpacecraftFrame.getZ(), 1.0e-3);
Vector3D position = state.getPVCoordinates(earth.getBodyFrame()).getPosition();
Vector3D los = groundP.subtract(position);
GeodeticPoint result = basicScan.intersection(earth, position, los);
Assert.assertEquals(0.0, groundP.distance(earth.transform(result)), 0.03);
}
@Test
public void testCliffsOfMoher()
throws RuggedException, OrekitException, URISyntaxException {
String path = getClass().getClassLoader().getResource("orekit-data").toURI().getPath();
DataProvidersManager.getInstance().addProvider(new DirectoryCrawler(new File(path)));
ExtendedEllipsoid earth = new ExtendedEllipsoid(Constants.WGS84_EARTH_EQUATORIAL_RADIUS,
Constants.WGS84_EARTH_FLATTENING,
FramesFactory.getITRF(IERSConventions.IERS_2010, true));
// cliffs of Moher location according to Wikipedia: 52°56′10″N 9°28′15″ W
GeodeticPoint north = new GeodeticPoint(FastMath.toRadians(52.9984),
FastMath.toRadians(-9.4072),
120.0);
GeodeticPoint south = new GeodeticPoint(FastMath.toRadians(52.9625),
FastMath.toRadians(-9.4369),
120.0);
// pixels are about 10m x 10m here and a tile covers 1km x 1km
TileUpdater updater = new CliffsElevationUpdater(north, south,
120.0, 0.0,
FastMath.toRadians(0.015), 101);
// test point on top the cliffs, roughly 15m East of edge (inland)
double latitude = 0.5 * (north.getLatitude() + south.getLatitude());
double longitude = 0.5 * (north.getLongitude() + south.getLongitude()) +
15.0 / (Constants.WGS84_EARTH_EQUATORIAL_RADIUS * FastMath.cos(latitude));
SimpleTile tile = new SimpleTileFactory().createTile();
updater.updateTile(latitude, longitude, tile);
double altitude = tile.interpolateElevation(latitude, longitude);
GeodeticPoint groundGP = new GeodeticPoint(latitude, longitude, altitude);
Vector3D groundP = earth.transform(groundGP);
BasicScanAlgorithm basicScan = new BasicScanAlgorithm();
basicScan.setUpTilesManagement(updater, 8);
// some orbital parameters have been computed using Orekit
// tutorial about phasing, using the following configuration:
//
// orbit.date = 2012-01-01T00:00:00.000
// phasing.orbits.number = 143
// phasing.days.number = 10
// sun.synchronous.reference.latitude = 0
// sun.synchronous.reference.ascending = false
// sun.synchronous.mean.solar.time = 10:30:00
// gravity.field.degree = 12
// gravity.field.order = 12
//
// the resulting phased orbit has then been propagated to a date corresponding
// to test point lying in the spacecraft (YZ) plane (with nadir pointing and yaw compensation)
AbsoluteDate crossing = new AbsoluteDate("2012-01-07T11:50:04.935272115", TimeScalesFactory.getUTC());
SpacecraftState state =
new SpacecraftState(new CartesianOrbit(new PVCoordinates(new Vector3D( 412324.544397459,
-4325872.329311633,
5692124.593989491),
new Vector3D(-1293.174701214779,
-5900.764863603793,
-4378.671036383179)),
FramesFactory.getEME2000(),
crossing,
Constants.EIGEN5C_EARTH_MU),
new Attitude(crossing,
FramesFactory.getEME2000(),
new Rotation(-0.17806699079182878,
0.60143347387211290,
-0.73251248177468900,
-0.26456641385623986,
true),
new Vector3D(-4.289600857433520e-05,
-1.039151496480297e-03,
5.811423736843181e-05)));
// preliminary check: the point has been chosen in the spacecraft (YZ) plane
Transform earthToSpacecraft = new Transform(state.getDate(),
earth.getBodyFrame().getTransformTo(state.getFrame(), state.getDate()),
state.toTransform());
Vector3D pointInSpacecraftFrame = earthToSpacecraft.transformPosition(groundP);
Assert.assertEquals( 0.000, pointInSpacecraftFrame.getX(), 1.0e-3);
Assert.assertEquals( 66702.419, pointInSpacecraftFrame.getY(), 1.0e-3);
Assert.assertEquals(796873.178, pointInSpacecraftFrame.getZ(), 1.0e-3);
Vector3D position = state.getPVCoordinates(earth.getBodyFrame()).getPosition();
Vector3D los = groundP.subtract(position);
GeodeticPoint result = basicScan.intersection(earth, position, los);
Assert.assertEquals(0.0, groundP.distance(earth.transform(result)), 0.03);
}
}
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