ShiftingPVCoordinatesProvider.java
/* Copyright 2002-2024 Luc Maisonobe
* Licensed to CS GROUP (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.utils;
import org.orekit.frames.Frame;
import org.orekit.time.AbsoluteDate;
/** Provider using simple {@link PVCoordinates#shiftedBy(double)} shiftedBy} and frame transforms for evolution.
* @author Luc Maisonobe
* @since 12.1
*/
public class ShiftingPVCoordinatesProvider implements PVCoordinatesProvider {
/** Reference coordinates. */
private final TimeStampedPVCoordinates referencePV;
/** Frame in which {@link #referencePV} is defined. */
private final Frame referenceFrame;
/** Simple constructor.
* @param referencePV reference coordinates
* @param referenceFrame frame in which {@code reference} is defined
*/
public ShiftingPVCoordinatesProvider(final TimeStampedPVCoordinates referencePV,
final Frame referenceFrame) {
this.referencePV = referencePV;
this.referenceFrame = referenceFrame;
}
/** {@inheritDoc} */
@Override
public TimeStampedPVCoordinates getPVCoordinates(final AbsoluteDate date,
final Frame frame) {
final TimeStampedPVCoordinates shifted = referencePV.shiftedBy(date.durationFrom(referencePV));
return referenceFrame.getTransformTo(frame, date).transformPVCoordinates(shifted);
}
}