GCTAPointing.hpp
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/***************************************************************************
* GCTAPointing.hpp - CTA pointing 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 GCTAPointing.hpp
* @brief CTA pointing class interface definition
* @author Juergen Knoedlseder
*/
#ifndef GCTAPOINTING_HPP
#define GCTAPOINTING_HPP
/* __ Includes ___________________________________________________________ */
#include <string>
#include "GSkyDir.hpp"
#include "GTime.hpp"
#include "GMatrix.hpp"
#include "GNodeArray.hpp"
#include "GHorizDir.hpp"
/***********************************************************************//**
* @class GCTAPointing
*
* @brief CTA pointing class.
*
* This class implements a CTA pointing. For the time being it is assumed
* that the pointing direction is time-independent.
*
* @todo No transformation from sky coordinates to geographic coordinates
* has so far been implemented. The azimuth and zenith angle are not
* meaningful.
***************************************************************************/
class GCTAPointing : public GBase {
public:
// Constructors and destructors
GCTAPointing(void);
explicit GCTAPointing(const GSkyDir& dir);
GCTAPointing(const GCTAPointing& pnt);
virtual ~GCTAPointing(void);
// Operators
virtual GCTAPointing& operator=(const GCTAPointing& pnt);
// Implemented pure virtual methods
virtual void clear(void);
virtual GCTAPointing* clone(void) const;
virtual const GSkyDir& dir(void) const;
virtual std::string print(const GChatter& chatter = NORMAL) const;
// Other methods
void dir(const GSkyDir& dir);
const GMatrix& rot(void) const;
const double& zenith(void) const;
const double& azimuth(void) const;
const GHorizDir dir_horiz( const GTime &time ) const;
void load_pointing_table(std::string filename);
protected:
// Protected methods
void init_members(void);
void copy_members(const GCTAPointing& pnt);
void free_members(void);
void update(void) const;
// Protected members
GSkyDir m_dir; //!< Pointing direction in sky coordinates
double m_zenith; //!< Pointing zenith angle
double m_azimuth; //!< Pointing azimuth angle
bool m_has_table; //!< table is loaded
GNodeArray m_table_nodes;
std::vector<double> m_table_az; //!< table of azimuths (rad)
std::vector<double> m_table_alt; //!< table of altitudes (rad)
GTime m_table_tmin; //!< min time bound in table
GTime m_table_tmax; //!<max time bound in table
// Cached members
mutable bool m_has_cache; //!< Has transformation cache
mutable GMatrix m_Rback; //!< Rotation matrix
};
/***********************************************************************//**
* @brief Return pointing sky direction
*
* @return Pointing sky direction.
***************************************************************************/
inline
const GSkyDir& GCTAPointing::dir(void) const
{
return m_dir;
}
/***********************************************************************//**
* @brief Return pointing zenith angle
*
* @return Pointing zenith angle.
***************************************************************************/
inline
const double& GCTAPointing::zenith(void) const
{
return m_zenith;
}
/***********************************************************************//**
* @brief Return pointing azimuth angle
*
* @return Pointing zenith angle.
***************************************************************************/
inline
const double& GCTAPointing::azimuth(void) const
{
return m_azimuth;
}
#endif /* GCTAPOINTING_HPP */