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.orekit.frames.TopocentricFrame;
20  
21  
22  /**
23   * Abstract class for topocentric event function.
24   * @author Romain Serra
25   * @since 14.0
26   */
27  public abstract class AbstractTopocentricEventFunction implements EventFunction {
28  
29      /** Topocentric frame. */
30      private final TopocentricFrame topocentricFrame;
31  
32      /** Constructor.
33       * @param topo reference to a topocentric model
34       */
35      protected AbstractTopocentricEventFunction(final TopocentricFrame topo) {
36          this.topocentricFrame = topo;
37      }
38  
39      /**
40       * Getter for the topocentric frame.
41       * @return frame
42       */
43      public TopocentricFrame getTopocentricFrame() {
44          return topocentricFrame;
45      }
46  
47  }