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    * contributor license agreements.  See the NOTICE file distributed with
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    * 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
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    *
    *   http://www.apache.org/licenses/LICENSE-2.0
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   * Unless required by applicable law or agreed to in writing, software
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  package org.orekit.geometry.fov;
  
  import org.hipparchus.geometry.euclidean.threed.RotationOrder;
  import org.hipparchus.geometry.euclidean.threed.Vector3D;
  import org.hipparchus.random.Well19937a;
  import org.hipparchus.util.FastMath;
  import org.junit.jupiter.api.Test;
  import org.orekit.attitudes.LofOffset;
  import org.orekit.attitudes.NadirPointing;
  import org.orekit.frames.LOFType;
  import org.orekit.frames.Transform;
  import org.orekit.time.AbsoluteDate;
  
  public class CircularFieldOfViewTest extends AbstractSmoothFieldOfViewTest {
  
      @Test
      public void testNadirNoMargin() {
          doTestFootprint(new CircularFieldOfView(Vector3D.PLUS_K, FastMath.toRadians(3.0), 0.0),
                          new NadirPointing(orbit.getFrame(), earth),
                          3.0, 3.0, 85.3650, 85.3745, 181027.5, 181028.5);
      }
  
      @Test
      public void testNadirMargin() {
          doTestFootprint(new CircularFieldOfView(Vector3D.PLUS_K, FastMath.toRadians(3.0), 0.01),
                          new NadirPointing(orbit.getFrame(), earth),
                          3.0, 3.0, 85.3650, 85.3745, 181027.5, 181028.5);
      }
  
      @Test
      public void testRollPitchYaw() {
          doTestFootprint(new CircularFieldOfView(Vector3D.PLUS_K, FastMath.toRadians(3.0), 0.0),
                          new LofOffset(orbit.getFrame(), LOFType.LVLH_CCSDS, RotationOrder.XYZ,
                                        FastMath.toRadians(10),
                                        FastMath.toRadians(20),
                                        FastMath.toRadians(5)),
                          3.0, 3.0, 48.8582, 59.4238, 1256410.4, 1761338.4);
      }
  
      @Test
      public void testFOVPartiallyTruncatedAtLimb() {
          doTestFootprint(new CircularFieldOfView(Vector3D.PLUS_K, FastMath.toRadians(3.0), 0.0),
                          new LofOffset(orbit.getFrame(), LOFType.LVLH_CCSDS, RotationOrder.XYZ,
                                        FastMath.toRadians(-10),
                                        FastMath.toRadians(-39),
                                        FastMath.toRadians(-5)),
                          0.3899, 3.0, 0.0, 21.7315, 3431325.4, 5346737.5);
      }
  
      @Test
      public void testFOVLargerThanEarth() {
          doTestFootprint(new CircularFieldOfView(Vector3D.PLUS_K, FastMath.toRadians(45.0), 0.0),
                          new NadirPointing(orbit.getFrame(), earth),
                          40.3505, 40.4655, 0.0, 0.0, 5323032.8, 5347029.8);
      }
  
      @Test
      public void testFOVAwayFromEarth() {
          doTestFOVAwayFromEarth(new CircularFieldOfView(Vector3D.MINUS_K, FastMath.toRadians(3.0), 0.0),
                                 new LofOffset(orbit.getFrame(), LOFType.LVLH_CCSDS, RotationOrder.XYZ,
                                               FastMath.toRadians(-10),
                                               FastMath.toRadians(-39),
                                               FastMath.toRadians(-5)),
                                 Vector3D.MINUS_K);
      }
  
      @Test
      public void testBoundary() {
          doTestBoundary(new CircularFieldOfView(Vector3D.MINUS_K, FastMath.toRadians(3.0), 0.01),
                         new Well19937a(0x2fdf54d1c6f679afl),
                         2.0e-15);
      }
  
      @Test
      public void testNoFootprintInside() {
          doTestNoFootprintInside(new CircularFieldOfView(Vector3D.PLUS_K, FastMath.toRadians(3.0), 0.0),
                                  new Transform(AbsoluteDate.J2000_EPOCH, new Vector3D(5e6, 3e6, 2e6)));
      }
  
  }