DormandPrince54IntegratorBuilder.java

  1. /* Copyright 2002-2020 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.propagation.conversion;

  18. import org.hipparchus.ode.AbstractIntegrator;
  19. import org.hipparchus.ode.nonstiff.DormandPrince54Integrator;
  20. import org.orekit.orbits.Orbit;
  21. import org.orekit.orbits.OrbitType;
  22. import org.orekit.propagation.numerical.NumericalPropagator;

  23. /** Builder for DormandPrince54Integrator.
  24.  * @author Pascal Parraud
  25.  * @since 6.0
  26.  */
  27. public class DormandPrince54IntegratorBuilder implements ODEIntegratorBuilder {

  28.     /** Minimum step size (s). */
  29.     private final double minStep;

  30.     /** Maximum step size (s). */
  31.     private final double maxStep;

  32.     /** Minimum step size (s). */
  33.     private final double dP;

  34.     /** Build a new instance.
  35.      * @param minStep minimum step size (s)
  36.      * @param maxStep maximum step size (s)
  37.      * @param dP position error (m)
  38.      * @see DormandPrince54Integrator
  39.      * @see NumericalPropagator#tolerances(double, Orbit, OrbitType)
  40.      */
  41.     public DormandPrince54IntegratorBuilder(final double minStep, final double maxStep, final double dP) {
  42.         this.minStep = minStep;
  43.         this.maxStep = maxStep;
  44.         this.dP      = dP;
  45.     }

  46.     /** {@inheritDoc} */
  47.     public AbstractIntegrator buildIntegrator(final Orbit orbit, final OrbitType orbitType) {
  48.         final double[][] tol = NumericalPropagator.tolerances(dP, orbit, orbitType);
  49.         return new DormandPrince54Integrator(minStep, maxStep, tol[0], tol[1]);
  50.     }

  51. }