AttitudeProvider.java

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 * CS licenses this file to You under the Apache License, Version 2.0
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package org.orekit.attitudes;

import org.hipparchus.CalculusFieldElement;
import org.hipparchus.geometry.euclidean.threed.FieldRotation;
import org.hipparchus.geometry.euclidean.threed.Rotation;
import org.orekit.frames.Frame;
import org.orekit.time.AbsoluteDate;
import org.orekit.time.FieldAbsoluteDate;
import org.orekit.utils.FieldPVCoordinatesProvider;
import org.orekit.utils.PVCoordinatesProvider;


/** This interface represents an attitude provider model set.
 * <p>An attitude provider provides a way to compute an {@link Attitude Attitude}
 * from an date and position-velocity local provider.</p>
 * @author V&eacute;ronique Pommier-Maurussane
 */
public interface AttitudeProvider {

    /** Compute the attitude corresponding to an orbital state.
     * @param pvProv local position-velocity provider around current date
     * @param date current date
     * @param frame reference frame from which attitude is computed
     * @return attitude on the specified date and position-velocity state
     */
    Attitude getAttitude(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame);

    /** Compute the attitude corresponding to an orbital state.
     * @param pvProv local position-velocity provider around current date
     * @param date current date
     * @param frame reference frame from which attitude is computed
     * @param <T> type of the field elements
     * @return attitude on the specified date and position-velocity state
     * @since 9.0
     */
    <T extends CalculusFieldElement<T>> FieldAttitude<T> getAttitude(FieldPVCoordinatesProvider<T> pvProv,
                                                                     FieldAbsoluteDate<T> date,
                                                                     Frame frame);

    /** Compute the attitude-related rotation corresponding to an orbital state.
     * @param pvProv local position-velocity provider around current date
     * @param date current date
     * @param frame reference frame from which attitude is computed
     * @return attitude-related rotation on the specified date and position-velocity state
     * @since 12.0
     */
    default Rotation getAttitudeRotation(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) {
        return getAttitude(pvProv, date, frame).getRotation();
    }

    /** Compute the attitude-related rotation corresponding to an orbital state.
     * @param pvProv local position-velocity provider around current date
     * @param date current date
     * @param frame reference frame from which attitude is computed
     * @param <T> type of the field elements
     * @return rotation on the specified date and position-velocity state
     * @since 12.0
     */
    default <T extends CalculusFieldElement<T>> FieldRotation<T> getAttitudeRotation(FieldPVCoordinatesProvider<T> pvProv,
                                                                                     FieldAbsoluteDate<T> date,
                                                                                     Frame frame) {
        return getAttitude(pvProv, date, frame).getRotation();
    }

}