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/*!\internal
 * \file
 * \brief
 * Implements setstarttime class.
 *
 * \author Paul Bauer <paul.bauer.q@gmail.com>
 * \ingroup module_coordinateio
 */

#include "gmxpre.h"

#include "setstarttime.h"

#include <algorithm>

#include "gromacs/trajectory/trajectoryframe.h"
#include "gromacs/utility/exceptions.h"

namespace gmx
{

void SetStartTime::processFrame(const int /* framenumber */, t_trxframe* input)
{
    if (!haveProcessedFirstFrame_)
    {
        setInitialTime(input->time);
    }

    input->time  = input->time + differenceToInitialTime_;
    input->bTime = true;
}

void SetStartTime::setInitialTime(real initialTimeFromFrame)
{
    differenceToInitialTime_ = startTime_ - initialTimeFromFrame;
    haveProcessedFirstFrame_ = true;
}

} // namespace gmx
