282 lines
7.8 KiB
C++
282 lines
7.8 KiB
C++
// ____ ______ __
|
|
// / __ \ / ____// /
|
|
// / /_/ // / / /
|
|
// / ____// /___ / /___ PixInsight Class Library
|
|
// /_/ \____//_____/ PCL 2.4.23
|
|
// ----------------------------------------------------------------------------
|
|
// pcl/ZenithalProjections.h - Released 2022-03-12T18:59:29Z
|
|
// ----------------------------------------------------------------------------
|
|
// This file is part of the PixInsight Class Library (PCL).
|
|
// PCL is a multiplatform C++ framework for development of PixInsight modules.
|
|
//
|
|
// Copyright (c) 2003-2022 Pleiades Astrophoto S.L. All Rights Reserved.
|
|
//
|
|
// Redistribution and use in both source and binary forms, with or without
|
|
// modification, is permitted provided that the following conditions are met:
|
|
//
|
|
// 1. All redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
//
|
|
// 2. All redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the distribution.
|
|
//
|
|
// 3. Neither the names "PixInsight" and "Pleiades Astrophoto", nor the names
|
|
// of their contributors, may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission. For written
|
|
// permission, please contact info@pixinsight.com.
|
|
//
|
|
// 4. All products derived from this software, in any form whatsoever, must
|
|
// reproduce the following acknowledgment in the end-user documentation
|
|
// and/or other materials provided with the product:
|
|
//
|
|
// "This product is based on software from the PixInsight project, developed
|
|
// by Pleiades Astrophoto and its contributors (https://pixinsight.com/)."
|
|
//
|
|
// Alternatively, if that is where third-party acknowledgments normally
|
|
// appear, this acknowledgment must be reproduced in the product itself.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY PLEIADES ASTROPHOTO AND ITS CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PLEIADES ASTROPHOTO OR ITS
|
|
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
// EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, BUSINESS
|
|
// INTERRUPTION; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; AND LOSS OF USE,
|
|
// DATA OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
// POSSIBILITY OF SUCH DAMAGE.
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#ifndef __PCL_ZenithalProjections_h
|
|
#define __PCL_ZenithalProjections_h
|
|
|
|
/// \file pcl/ZenithalProjections.h
|
|
|
|
#include <pcl/Defs.h>
|
|
|
|
#include <pcl/ProjectionBase.h>
|
|
|
|
/*
|
|
* Based on original work contributed by Andrés del Pozo.
|
|
*/
|
|
|
|
namespace pcl
|
|
{
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* \class ZenithalProjectionBase
|
|
* \brief Base class of zenithal projection systems
|
|
*
|
|
* \ingroup astrometry_support
|
|
*/
|
|
class PCL_CLASS ZenithalProjectionBase : public ProjectionBase
|
|
{
|
|
protected:
|
|
|
|
/*!
|
|
* Default constructor.
|
|
*/
|
|
ZenithalProjectionBase()
|
|
{
|
|
m_theta0 = 90;
|
|
}
|
|
|
|
/*!
|
|
* Copy constructor.
|
|
*/
|
|
ZenithalProjectionBase( const ZenithalProjectionBase& ) = default;
|
|
|
|
/*!
|
|
* Returns a dynamically allocated duplicate of this object.
|
|
*/
|
|
virtual ProjectionBase* Clone() const override = 0;
|
|
|
|
/*!
|
|
* Returns the WCS projection identifier for this projection system.
|
|
*/
|
|
virtual IsoString ProjCode() const override = 0;
|
|
|
|
/*!
|
|
* Returns the readable name of this projection system.
|
|
*/
|
|
virtual IsoString Name() const override = 0;
|
|
|
|
protected:
|
|
|
|
/*!
|
|
* Transforms from world coordinates to native spherical coordinates.
|
|
*/
|
|
bool Project( DPoint& pW, const DPoint& pN ) const noexcept override
|
|
{
|
|
double rTheta = GetRTheta( pN );
|
|
double sinTheta, cosTheta;
|
|
SinCos( Rad( pN.x ), sinTheta, cosTheta );
|
|
pW.x = rTheta * sinTheta;
|
|
pW.y = -rTheta * cosTheta;
|
|
return true;
|
|
}
|
|
|
|
/*!
|
|
* Transforms from native spherical coordinates to world coordinates.
|
|
*/
|
|
bool Unproject( DPoint& pN, const DPoint& pW ) const noexcept override
|
|
{
|
|
pN.x = Deg( ArcTan( pW.x, -pW.y ) );
|
|
pN.y = GetTheta( Sqrt( pW.x*pW.x + pW.y*pW.y ) );
|
|
return true;
|
|
}
|
|
|
|
virtual double GetRTheta( const DPoint& np ) const = 0;
|
|
virtual double GetTheta( double rTheta ) const = 0;
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* \class ZenithalEqualAreaProjection
|
|
* \brief Zenithal equal-area projection system
|
|
*
|
|
* \ingroup astrometry_support
|
|
*/
|
|
class PCL_CLASS ZenithalEqualAreaProjection: public ZenithalProjectionBase
|
|
{
|
|
public:
|
|
|
|
/*!
|
|
* Default constructor.
|
|
*/
|
|
ZenithalEqualAreaProjection() = default;
|
|
|
|
/*!
|
|
* Copy constructor.
|
|
*/
|
|
ZenithalEqualAreaProjection( const ZenithalEqualAreaProjection& ) = default;
|
|
|
|
/*!
|
|
* Returns a dynamically allocated duplicate of this object.
|
|
*/
|
|
ProjectionBase* Clone() const override
|
|
{
|
|
return new ZenithalEqualAreaProjection( *this );
|
|
}
|
|
|
|
/*!
|
|
* Returns the WCS projection identifier for this projection system.
|
|
*/
|
|
IsoString ProjCode() const override
|
|
{
|
|
return "ZEA";
|
|
}
|
|
|
|
/*!
|
|
* Returns the readable name of this projection system.
|
|
*/
|
|
IsoString Name() const override
|
|
{
|
|
return "Zenithal Equal Area";
|
|
}
|
|
|
|
/*!
|
|
*
|
|
*/
|
|
bool CheckBrokenLine( const DPoint& cp1, const DPoint& cp2 ) const noexcept override
|
|
{
|
|
DPoint np1 = m_sph.CelestialToNative( cp1 );
|
|
DPoint np2 = m_sph.CelestialToNative( cp2 );
|
|
return Min( Mod( Abs( np1.x - np2.x - 360 ), 360.0 ),
|
|
Mod( Abs( np1.x - np2.x + 360 ), 360.0 ) ) < 180*Sin( Rad( 45 + (np1.y + np2.y)/2/2 ) );
|
|
}
|
|
|
|
private:
|
|
|
|
double GetRTheta( const DPoint& np ) const override
|
|
{
|
|
return 2 * Deg( Sin( Rad( (90 - np.y)/2 ) ) );
|
|
}
|
|
|
|
double GetTheta( double rTheta ) const override
|
|
{
|
|
return 90 - 2*Deg( ArcSin( Rad( rTheta )/2 ) );
|
|
}
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* \class StereographicProjection
|
|
* \brief Stereographic projection system
|
|
*
|
|
* \ingroup astrometry_support
|
|
*/
|
|
class PCL_CLASS StereographicProjection: public ZenithalProjectionBase
|
|
{
|
|
public:
|
|
|
|
/*!
|
|
* Default constructor.
|
|
*/
|
|
StereographicProjection() = default;
|
|
|
|
/*!
|
|
* Copy constructor.
|
|
*/
|
|
StereographicProjection( const StereographicProjection& ) = default;
|
|
|
|
/*!
|
|
* Returns a dynamically allocated duplicate of this object.
|
|
*/
|
|
ProjectionBase* Clone() const override
|
|
{
|
|
return new StereographicProjection( *this );
|
|
}
|
|
|
|
/*!
|
|
* Returns the WCS projection identifier for this projection system.
|
|
*/
|
|
IsoString ProjCode() const override
|
|
{
|
|
return "STG";
|
|
}
|
|
|
|
/*!
|
|
* Returns the readable name of this projection system.
|
|
*/
|
|
IsoString Name() const override
|
|
{
|
|
return "Stereographic";
|
|
}
|
|
|
|
/*!
|
|
*
|
|
*/
|
|
bool CheckBrokenLine(const DPoint& cp1, const DPoint& cp2) const noexcept override
|
|
{
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
|
|
double GetRTheta( const DPoint& np ) const override
|
|
{
|
|
return 2 * Deg( Tan( Rad( (90 - np.y)/2 ) ) );
|
|
}
|
|
|
|
double GetTheta( double rTheta ) const override
|
|
{
|
|
return 90 - 2*Deg( ArcTan( Rad( rTheta )/2 ) );
|
|
}
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
} // pcl
|
|
|
|
#endif // __PCL_ZenithalProjections_h
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// EOF pcl/ZenithalProjections.h - Released 2022-03-12T18:59:29Z
|