ITRFDirection.h

// ITRFDirection.h: Functor that maps time to an ITRF direction.
//
// Copyright (C) 2013
// ASTRON (Netherlands Institute for Radio Astronomy)
// P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
//
// This file is part of the LOFAR software suite.
// The LOFAR software suite is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The LOFAR software suite is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with the LOFAR software suite. If not, see <http://www.gnu.org/licenses/>.
//
// $Id$

#ifndef EVERYBEAM_ITRFDIRECTION_H
#define EVERYBEAM_ITRFDIRECTION_H

// \file
// Functor that maps time to an ITRF direction.

#include "Types.h"

#include <casacore/measures/Measures/MeasFrame.h>
#include <casacore/measures/Measures/MeasConvert.h>
#include <casacore/measures/Measures/MCDirection.h>

#include <memory>
#include <mutex>

namespace everybeam {

class ITRFDirection
{
public:
    typedef std::shared_ptr<ITRFDirection>       Ptr;
    typedef std::shared_ptr<const ITRFDirection> ConstPtr;

    ITRFDirection(const vector3r_t &position, const vector2r_t &direction);
    ITRFDirection(const vector3r_t &position, const vector3r_t &direction);
    ITRFDirection(const vector2r_t &direction);
    ITRFDirection(const vector3r_t &direction);

    vector3r_t at(real_t time) const;

    const static vector3r_t& LOFARPosition() { return itsLOFARPosition; }

private:
    //ITRF position of CS002LBA, just to use a fixed reference
    const static vector3r_t itsLOFARPosition;

    mutable casacore::MeasFrame             itsFrame;
    mutable casacore::MDirection::Convert   itsConverter;
    mutable std::mutex                      itsMutex;
};

} // namespace everybeam

#endif