1   /* Copyright 2002-2024 CS GROUP
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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
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8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
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11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
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14   * See the License for the specific language governing permissions and
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17  package org.orekit.propagation.conversion;
18  
19  import org.hipparchus.ode.AbstractIntegrator;
20  import org.hipparchus.ode.nonstiff.DormandPrince853Integrator;
21  import org.orekit.orbits.Orbit;
22  import org.orekit.orbits.OrbitType;
23  import org.orekit.propagation.numerical.NumericalPropagator;
24  
25  /** Builder for DormandPrince853Integrator.
26   * @author Pascal Parraud
27   * @since 6.0
28   */
29  public class DormandPrince853IntegratorBuilder implements ODEIntegratorBuilder {
30  
31      /** Minimum step size (s). */
32      private final double minStep;
33  
34      /** Maximum step size (s). */
35      private final double maxStep;
36  
37      /** Position error (m). */
38      private final double dP;
39  
40      /** Build a new instance.
41       * @param minStep minimum step size (s)
42       * @param maxStep maximum step size (s)
43       * @param dP position error (m)
44       * @see DormandPrince853Integrator
45       * @see NumericalPropagator#tolerances(double, Orbit, OrbitType)
46       */
47      public DormandPrince853IntegratorBuilder(final double minStep, final double maxStep, final double dP) {
48          this.minStep = minStep;
49          this.maxStep = maxStep;
50          this.dP      = dP;
51      }
52  
53      /** {@inheritDoc} */
54      public AbstractIntegrator buildIntegrator(final Orbit orbit, final OrbitType orbitType) {
55          final double[][] tol = NumericalPropagator.tolerances(dP, orbit, orbitType);
56          return new DormandPrince853Integrator(minStep, maxStep, tol[0], tol[1]);
57      }
58  
59  }