1   /* Copyright 2002-2024 Luc Maisonobe
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  
18  package org.orekit.utils;
19  
20  import org.hipparchus.CalculusFieldElement;
21  import org.orekit.frames.Frame;
22  import org.orekit.time.AbsoluteDate;
23  import org.orekit.time.FieldAbsoluteDate;
24  
25  /** Adapter from {@link Frame} to {@link ExtendedPVCoordinatesProvider}.
26   * <p>
27   * The moving point is the origin of the adapted frame.
28   * </p>
29   * <p>
30   * This class is roughly the inverse of {@link ExtendedPVCoordinatesProviderAdapter}
31   * </p>
32   * @see ExtendedPVCoordinatesProviderAdapter
33   * @since 12.0
34   * @author Luc Maisonobe
35   */
36  public class FrameAdapter implements ExtendedPVCoordinatesProvider {
37  
38      /** Frame whose origin coordinates are desired. */
39      private final Frame originFrame;
40  
41      /** Simple constructor.
42       * @param originFrame frame whose origin coordinates are desired
43       */
44      public FrameAdapter(final Frame originFrame) {
45          this.originFrame = originFrame;
46      }
47  
48      /** {@inheritDoc} */
49      @Override
50      public TimeStampedPVCoordinates getPVCoordinates(final AbsoluteDate date, final Frame frame) {
51          return new TimeStampedPVCoordinates(date,
52                                              originFrame.
53                                              getTransformTo(frame, date).
54                                              transformPVCoordinates(PVCoordinates.ZERO));
55      }
56  
57      /** {@inheritDoc} */
58      @Override
59      public <T extends CalculusFieldElement<T>> TimeStampedFieldPVCoordinates<T> getPVCoordinates(final FieldAbsoluteDate<T> date,
60                                                                                                   final Frame frame) {
61          return new TimeStampedFieldPVCoordinates<>(date,
62                                                     originFrame.
63                                                     getTransformTo(frame, date).
64                                                     transformPVCoordinates(PVCoordinates.ZERO));
65      }
66  
67  }