GSkyProjection.hpp
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/***************************************************************************
* GSkyProjection.hpp - Abstract sky projection base class *
* ----------------------------------------------------------------------- *
* copyright (C) 2010-2013 by Juergen Knoedlseder *
* ----------------------------------------------------------------------- *
* *
* 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 3 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, see <http://www.gnu.org/licenses/>. *
* *
***************************************************************************/
/**
* @file GSkyProjection.hpp
* @brief Abstract sky projection base class definition
* @author Juergen Knoedlseder
*/
#ifndef GSKYPROJECTION_HPP
#define GSKYPROJECTION_HPP
/* __ Includes ___________________________________________________________ */
#include <string>
#include "GBase.hpp"
#include "GFitsHDU.hpp"
#include "GSkyDir.hpp"
#include "GSkyPixel.hpp"
/***********************************************************************//**
* @class GSkyProjection
*
* @brief Abstract sky projection base class
*
* This class defines an abstract projection from sky coordinates into
* pixel coordinates. Sky coordinates are implemented using the GSkyDir
* class, pixel coordinates are implemented using the GSkyPixel class.
***************************************************************************/
class GSkyProjection : public GBase {
// Operator friends
friend bool operator==(const GSkyProjection &a, const GSkyProjection &b);
friend bool operator!=(const GSkyProjection &a, const GSkyProjection &b);
public:
// Constructors and destructors
GSkyProjection(void);
GSkyProjection(const GSkyProjection& proj);
virtual ~GSkyProjection(void);
// Operators
virtual GSkyProjection& operator=(const GSkyProjection& proj);
// Pure virtual methods
virtual void clear(void) = 0;
virtual GSkyProjection* clone(void) const = 0;
virtual int size(void) const = 0;
virtual std::string code(void) const = 0;
virtual std::string name(void) const = 0;
virtual void read(const GFitsHDU& hdu) = 0;
virtual void write(GFitsHDU& hdu) const = 0;
virtual double solidangle(const GSkyPixel& pixel) const = 0;
virtual GSkyDir pix2dir(const GSkyPixel& pixel) const = 0;
virtual GSkyPixel dir2pix(const GSkyDir& dir) const = 0;
virtual std::string print(const GChatter& chatter = NORMAL) const = 0;
// Virtual methods
virtual std::string coordsys(void) const;
virtual void coordsys(const std::string& coordsys);
protected:
// Protected methods
void init_members(void);
void copy_members(const GSkyProjection& proj);
void free_members(void);
virtual bool compare(const GSkyProjection& proj) const = 0;
// Protected members
int m_coordsys; //!< 0=EQU, 1=GAL
};
#endif /* GSKYPROJECTION_HPP */