Examples with Well1024a org.hipparchus.random.Well1024a used on opensource projects

Example 21 with Well1024a

use of org.hipparchus.random.Well1024a in project Orekit by CS-SI.

the class TimeStampedAngularCoordinatesTest method testOnePair.

@Test
public void testOnePair() throws OrekitException, java.io.IOException {
    RandomGenerator random = new Well1024a(0xed7dd911a44c5197l);
    for (int i = 0; i < 20; ++i) {
        Rotation r = randomRotation(random);
        Vector3D o = randomVector(random, 1.0e-2);
        Vector3D a = randomVector(random, 1.0e-2);
        TimeStampedAngularCoordinates reference = new TimeStampedAngularCoordinates(AbsoluteDate.J2000_EPOCH, r, o, a);
        PVCoordinates u = randomPVCoordinates(random, 1000, 1.0, 0.001);
        PVCoordinates v = reference.applyTo(u);
        TimeStampedAngularCoordinates ac = new TimeStampedAngularCoordinates(AbsoluteDate.J2000_EPOCH, u, v);
        Assert.assertEquals(0, Vector3D.distance(v.getPosition().normalize(), ac.applyTo(u).getPosition().normalize()), 1.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v.getVelocity().normalize(), ac.applyTo(u).getVelocity().normalize()), 4.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v.getAcceleration().normalize(), ac.applyTo(u).getAcceleration().normalize()), 1.0e-14);
    }
}

Example 22 with Well1024a

use of org.hipparchus.random.Well1024a in project Orekit by CS-SI.

the class TimeStampedAngularCoordinatesTest method testTwoPairs.

@Test
public void testTwoPairs() throws OrekitException, java.io.IOException {
    RandomGenerator random = new Well1024a(0x976ad943966c9f00l);
    for (int i = 0; i < 20; ++i) {
        Rotation r = randomRotation(random);
        Vector3D o = randomVector(random, 1.0e-2);
        Vector3D a = randomVector(random, 1.0e-2);
        TimeStampedAngularCoordinates reference = new TimeStampedAngularCoordinates(AbsoluteDate.J2000_EPOCH, r, o, a);
        PVCoordinates u1 = randomPVCoordinates(random, 1000, 1.0, 0.001);
        PVCoordinates u2 = randomPVCoordinates(random, 1000, 1.0, 0.001);
        PVCoordinates v1 = reference.applyTo(u1);
        PVCoordinates v2 = reference.applyTo(u2);
        TimeStampedAngularCoordinates ac = new TimeStampedAngularCoordinates(AbsoluteDate.J2000_EPOCH, u1, u2, v1, v2, 1.0e-9);
        Assert.assertEquals(0, Vector3D.distance(v1.getPosition().normalize(), ac.applyTo(u1).getPosition().normalize()), 1.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v1.getVelocity().normalize(), ac.applyTo(u1).getVelocity().normalize()), 1.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v1.getAcceleration().normalize(), ac.applyTo(u1).getAcceleration().normalize()), 1.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v2.getPosition().normalize(), ac.applyTo(u2).getPosition().normalize()), 1.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v2.getVelocity().normalize(), ac.applyTo(u2).getVelocity().normalize()), 1.0e-14);
        Assert.assertEquals(0, Vector3D.distance(v2.getAcceleration().normalize(), ac.applyTo(u2).getAcceleration().normalize()), 1.0e-14);
    }
}

Example 23 with Well1024a

use of org.hipparchus.random.Well1024a in project Orekit by CS-SI.

the class TimeStampedAngularCoordinatesTest method testReverseOffset.

@Test
public void testReverseOffset() {
    RandomGenerator random = new Well1024a(0x4ecca9d57a8f1611l);
    for (int i = 0; i < 100; ++i) {
        Rotation r = randomRotation(random);
        Vector3D o = randomVector(random, 1.0e-3);
        Vector3D a = randomVector(random, 1.0e-3);
        TimeStampedAngularCoordinates ac = new TimeStampedAngularCoordinates(AbsoluteDate.J2000_EPOCH, r, o, a);
        TimeStampedAngularCoordinates sum = ac.addOffset(ac.revert());
        Assert.assertEquals(0.0, sum.getRotation().getAngle(), 1.0e-15);
        Assert.assertEquals(0.0, sum.getRotationRate().getNorm(), 1.0e-15);
        Assert.assertEquals(0.0, sum.getRotationAcceleration().getNorm(), 1.0e-15);
    }
}

Example 24 with Well1024a

use of org.hipparchus.random.Well1024a in project Orekit by CS-SI.

the class UTCScaleTest method testMultithreading.

@Test
public void testMultithreading() {
    // generate reference offsets using a single thread
    RandomGenerator random = new Well1024a(6392073424l);
    List<AbsoluteDate> datesList = new ArrayList<AbsoluteDate>();
    List<Double> offsetsList = new ArrayList<Double>();
    AbsoluteDate reference = utc.getFirstKnownLeapSecond().shiftedBy(-Constants.JULIAN_YEAR);
    double testRange = utc.getLastKnownLeapSecond().durationFrom(reference) + Constants.JULIAN_YEAR;
    for (int i = 0; i < 10000; ++i) {
        AbsoluteDate randomDate = reference.shiftedBy(random.nextDouble() * testRange);
        datesList.add(randomDate);
        offsetsList.add(utc.offsetFromTAI(randomDate));
    }
    // check the offsets in multi-threaded mode
    ExecutorService executorService = Executors.newFixedThreadPool(100);
    for (int i = 0; i < datesList.size(); ++i) {
        final AbsoluteDate date = datesList.get(i);
        final double offset = offsetsList.get(i);
        executorService.execute(new Runnable() {

            public void run() {
                Assert.assertEquals(offset, utc.offsetFromTAI(date), 1.0e-12);
            }
        });
    }
    try {
        executorService.shutdown();
        executorService.awaitTermination(3, TimeUnit.SECONDS);
    } catch (InterruptedException ie) {
        Assert.fail(ie.getLocalizedMessage());
    }
}

Example 25 with Well1024a

use of org.hipparchus.random.Well1024a in project Orekit by CS-SI.

the class AngularCoordinatesTest method testRodriguesSymmetry.

@Test
public void testRodriguesSymmetry() {
    // check the two-way conversion result in identity
    RandomGenerator random = new Well1024a(0xb1e615aaa8236b52l);
    for (int i = 0; i < 1000; ++i) {
        Rotation rotation = randomRotation(random);
        Vector3D rotationRate = randomVector(random, 0.01);
        Vector3D rotationAcceleration = randomVector(random, 0.01);
        AngularCoordinates ac = new AngularCoordinates(rotation, rotationRate, rotationAcceleration);
        AngularCoordinates rebuilt = AngularCoordinates.createFromModifiedRodrigues(ac.getModifiedRodrigues(1.0));
        Assert.assertEquals(0.0, Rotation.distance(rotation, rebuilt.getRotation()), 1.0e-14);
        Assert.assertEquals(0.0, Vector3D.distance(rotationRate, rebuilt.getRotationRate()), 1.0e-15);
        Assert.assertEquals(0.0, Vector3D.distance(rotationAcceleration, rebuilt.getRotationAcceleration()), 1.0e-15);
    }
}