1   /* Copyright 2002-2025 CS GROUP
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.orekit.frames;
18  
19  import org.orekit.bodies.CelestialBody;
20  import org.orekit.utils.AngularDerivativesFilter;
21  import org.orekit.utils.CartesianDerivativesFilter;
22  import org.orekit.utils.Constants;
23  import org.orekit.utils.OrekitConfiguration;
24  
25  /**
26   * Class creating the inertial barycenter frame from two bodies.
27   * @author Vincent Mouraux
28   * @since 10.2
29   */
30  public class TwoBodiesBaryFrame extends Frame {
31  
32      /**
33       * Simple constructor.
34       * @param primaryBody Primary body.
35       * @param secondaryBody Secondary body.
36       */
37      public TwoBodiesBaryFrame(final CelestialBody primaryBody,
38                                final CelestialBody secondaryBody) {
39          super(primaryBody.getInertiallyOrientedFrame(),
40                new ShiftingTransformProvider(new TwoBodiesBaryTransformProvider(primaryBody, secondaryBody),
41                                              CartesianDerivativesFilter.USE_P,
42                                              AngularDerivativesFilter.USE_R, 5,
43                                              Constants.JULIAN_DAY / 24,
44                                              OrekitConfiguration.getCacheSlotsNumber(),
45                                              Constants.JULIAN_YEAR,
46                                              30 * Constants.JULIAN_DAY),
47                primaryBody .getName() + "-" + secondaryBody.getName() + "-Barycenter", true);
48      }
49  
50  }