Example usage for org.apache.commons.math.geometry Rotation revert

Introduction

In this page you can find the example usage for org.apache.commons.math.geometry Rotation revert.

Prototype

public Rotation revert() 

Source Link

Document

Revert a rotation.

Usage

From source file:org.orekit.frames.ITRF2005Frame.java

/** Update the frame to the given date.
 * <p>The update considers the pole motion from IERS data.</p>
 * @param date new value of the date//ww  w  .j  a  va2s.  com
 * @exception OrekitException if the nutation model data embedded in the
 * library cannot be read
 */
protected void updateFrame(final AbsoluteDate date) throws OrekitException {

    if ((cachedDate == null) || !cachedDate.equals(date)) {

        // offset from J2000 epoch in julian centuries
        final double tts = date.durationFrom(AbsoluteDate.J2000_EPOCH);
        final double ttc = tts / Constants.JULIAN_CENTURY;

        // pole correction parameters
        final PoleCorrection pCorr = ((TIRF2000Frame) getParent()).getPoleCorrection(date);
        final PoleCorrection nCorr = nutationCorrection(date);

        // elementary rotations due to pole motion in terrestrial frame
        final Rotation r1 = new Rotation(Vector3D.PLUS_I, -(pCorr.getYp() + nCorr.getYp()));
        final Rotation r2 = new Rotation(Vector3D.PLUS_J, -(pCorr.getXp() + nCorr.getXp()));
        final Rotation r3 = new Rotation(Vector3D.PLUS_K, S_PRIME_RATE * ttc);

        // complete pole motion in terrestrial frame
        final Rotation wRot = r3.applyTo(r2.applyTo(r1));

        // combined effects
        final Rotation combined = wRot.revert();

        // set up the transform from parent TIRF
        setTransform(new Transform(combined, Vector3D.ZERO));
        cachedDate = date;

    }
}

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