ksutils.h

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/***************************************************************************
                          kstars.h  -  K Desktop Planetarium
                             -------------------
    begin                : Mon Jan 7 2002
    copyright            : (C) 2002 by Mark Hollomon
    email                : mhh@mindspring.com
 ***************************************************************************/
/***************************************************************************
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef KSTARS_KSUTILS_H__
#define KSTARS_KSUTILS_H__

#include <cstddef>
#include <Eigen/Core>
USING_PART_OF_NAMESPACE_EIGEN
#include <QPointF>
#include "dms.h"

class QFile;
class QString;
class SkyPoint;

namespace KSUtils {
    bool openDataFile( QFile &file, const QString &filename );

    template<typename T>
    inline T clamp(T x, T min, T max) {
        if( x < min )
            return min;
        if( x > max )
            return max;
        return x;
    }

    template<typename T>
    inline T reduceAngle(T x, T min, T max) {
        T delta = max - min;
        return x - delta*floor( (x-min)/delta );
    }

    inline Vector3d fromSperical(dms longitude, dms latitude) {
        double sinL, sinB;
        double cosL, cosB;
        longitude.SinCos( sinL, cosL );
        latitude.SinCos(  sinB, cosB );
        return Vector3d(cosB*cosL, cosB*sinL, sinB);
    }

    inline QPointF vecToPoint(const Vector2f& vec) {
        return QPointF( vec[0], vec[1] );
    }

    inline Vector2f pointToVec(const QPointF& p) {
        return Vector2f(p.x(),p.y());
    }

    QString getDSSURL( const SkyPoint * const p );

    QString getDSSURL( const dms &ra, const dms &dec, float width = 0, float height = 0, const QString & type = "gif");

    QString toDirectionString( dms angle );

}

#endif