1   /* Copyright 2013-2019 CS Systèmes d'Information
2    * Licensed to CS Systèmes d'Information (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.rugged.intersection;
18  
19  import org.hipparchus.geometry.euclidean.threed.Vector3D;
20  import org.orekit.rugged.api.AlgorithmId;
21  import org.orekit.rugged.errors.DumpManager;
22  import org.orekit.rugged.utils.ExtendedEllipsoid;
23  import org.orekit.rugged.utils.NormalizedGeodeticPoint;
24  
25  /** Intersection ignoring Digital Elevation Model.
26   * <p>
27   * This dummy implementation simply uses the ellipsoid itself.
28   * </p>
29   * @author Luc Maisonobe
30   */
31  public class IgnoreDEMAlgorithm implements IntersectionAlgorithm {
32  
33      /** Simple constructor.
34       */
35      public IgnoreDEMAlgorithm() {
36      }
37  
38      /** {@inheritDoc} */
39      @Override
40      public NormalizedGeodeticPoint intersection(final ExtendedEllipsoid ellipsoid,
41                                                  final Vector3D position, final Vector3D los) {
42          DumpManager.dumpAlgorithm(AlgorithmId.IGNORE_DEM_USE_ELLIPSOID);
43          return ellipsoid.pointOnGround(position, los, 0.0);
44      }
45  
46      /** {@inheritDoc} */
47      @Override
48      public NormalizedGeodeticPoint refineIntersection(final ExtendedEllipsoid ellipsoid,
49                                                        final Vector3D position, final Vector3D los,
50                                                        final NormalizedGeodeticPoint closeGuess) {
51          DumpManager.dumpAlgorithm(AlgorithmId.IGNORE_DEM_USE_ELLIPSOID);
52          return intersection(ellipsoid, position, los);
53      }
54  
55      /** {@inheritDoc}
56       * <p>
57       * As this algorithm ignored the Digital Elevation Model,
58       * this method always returns 0.0.
59       * </p>
60       */
61      @Override
62      public double getElevation(final double latitude, final double longitude) {
63          DumpManager.dumpAlgorithm(AlgorithmId.IGNORE_DEM_USE_ELLIPSOID);
64          return 0.0;
65      }
66  
67  }