1   /* Copyright 2022-2026 Romain Serra
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.propagation.events.functions;
18  
19  import org.hipparchus.CalculusFieldElement;
20  import org.orekit.bodies.BodyShape;
21  import org.orekit.bodies.FieldGeodeticPoint;
22  import org.orekit.bodies.GeodeticPoint;
23  import org.orekit.propagation.FieldSpacecraftState;
24  import org.orekit.propagation.SpacecraftState;
25  
26  /** Abstract class for event function related to geodetic coordinates.
27   * @author Romain Serra
28   * @since 14.0
29   */
30  public abstract class AbstractGeodeticEventFunction implements EventFunction {
31  
32      /** Body shape. */
33      private final BodyShape bodyShape;
34  
35      /** Constructor.
36       * @param body body
37       */
38      protected AbstractGeodeticEventFunction(final BodyShape body) {
39          this.bodyShape = body;
40      }
41  
42      /**
43       * Getter for body shape.
44       * @return body
45       */
46      public BodyShape getBodyShape() {
47          return bodyShape;
48      }
49  
50      /** Compute the geodetic coordinates.
51       * @param s the current state information: date, kinematics, attitude
52       * @return geodetic point
53       */
54      protected GeodeticPoint transformToGeodeticPoint(final SpacecraftState s) {
55          return getBodyShape().transform(s.getPosition(), s.getFrame(), s.getDate());
56      }
57  
58      /** Compute the geodetic coordinates (Field version).
59       * @param s the current state information: date, kinematics, attitude
60       * @param <T> field type
61       * @return geodetic point
62       */
63      protected <T extends CalculusFieldElement<T>> FieldGeodeticPoint<T> transformToGeodeticPoint(final FieldSpacecraftState<T> s) {
64          return getBodyShape().transform(s.getPosition(), s.getFrame(), s.getDate());
65      }
66  }