1   /* Copyright 2002-2024 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  
18  package org.orekit.utils;
19  
20  import org.hipparchus.CalculusFieldElement;
21  import org.hipparchus.geometry.euclidean.threed.FieldVector3D;
22  import org.orekit.frames.Frame;
23  import org.orekit.time.FieldAbsoluteDate;
24  
25  /**
26  ** Interface for PV coordinates providers that also support fields.
27   * @since 9.2
28   * @author Luc Maisonobe
29   */
30  public interface ExtendedPVCoordinatesProvider extends ExtendedPositionProvider {
31  
32      /** Get the position of the body in the selected frame.
33       * @param date current date
34       * @param frame the frame where to define the position
35       * @param <T> type for the field elements
36       * @return position of the body (m and)
37       * @since 12.0
38       */
39      default <T extends CalculusFieldElement<T>> FieldVector3D<T> getPosition(final FieldAbsoluteDate<T> date, final Frame frame) {
40          return getPVCoordinates(date, frame).getPosition();
41      }
42  
43      /** Get the {@link FieldPVCoordinates} of the body in the selected frame.
44       * @param date current date
45       * @param frame the frame where to define the position
46       * @param <T> type for the field elements
47       * @return time-stamped position/velocity of the body (m and m/s)
48       */
49      @Override
50      <T extends CalculusFieldElement<T>>TimeStampedFieldPVCoordinates<T> getPVCoordinates(FieldAbsoluteDate<T> date,
51                                                                                           Frame frame);
52  
53  }