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.geometry.fov;
18  
19  /** Abstract class representing a spacecraft sensor Field Of View.
20   * @author Luc Maisonobe
21   * @since 10.1
22   */
23  public abstract class AbstractFieldOfView implements FieldOfView {
24  
25      /** Margin to apply to the zone. */
26      private final double margin;
27  
28      /** Build a new instance.
29       * @param margin angular margin to apply to the zone (if positive,
30       * points outside of the raw FoV but close enough to the boundary are
31       * considered visible; if negative, points inside of the raw FoV
32       * but close enough to the boundary are considered not visible)
33       */
34      protected AbstractFieldOfView(final double margin) {
35          this.margin = margin;
36      }
37  
38      /** {@inheritDoc} */
39      @Override
40      public double getMargin() {
41          return margin;
42      }
43  
44  }