discretesource.h

/*

  This file is a part of GRALE, a library to facilitate the simulation
  and inversion of gravitational lenses.

  Copyright (C) 2008-2012 Jori Liesenborgs

  Contact: jori.liesenborgs@gmail.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.
  
  This program 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 this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  
*/

#ifndef GRALE_DISCRETESOURCE_H

#define GRALE_DISCRETESOURCE_H

#include "graleconfig.h"
#include "sourceimage.h"
#include <string>

namespace grale
{

class GridFunction;

class GRALE_IMPORTEXPORT DiscreteSource : public SourceImage
{
public:
        DiscreteSource(Vector2D<double> angularpos, double angle, double brightnessScale);
        ~DiscreteSource();

        bool loadFITS(const std::string &fname, double angularWidth, double angularHeight);
        bool setGridFunction(const GridFunction *pGridFunction);
        
        SourceImage *createCopy() const;
protected:
        DiscreteSource();
        double getIntensityInternal(Vector2D<double> diff) const;
        double getMaxRadius() const                                                                     { return m_maxRadius; }
private:
        void calcMaxRadius();

        GridFunction *m_pGridFunction;
        
        friend class SourceImage;
        double m_maxRadius;
};

} // end namespace

#endif // GRALE_DISCRETESOURCE_H