232 lines
7.2 KiB
C++
232 lines
7.2 KiB
C++
// ____ ______ __
|
|
// / __ \ / ____// /
|
|
// / /_/ // / / /
|
|
// / ____// /___ / /___ PixInsight Class Library
|
|
// /_/ \____//_____/ PCL 2.4.23
|
|
// ----------------------------------------------------------------------------
|
|
// pcl/ProjectionBase.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_ProjectionBase_h
|
|
#define __PCL_ProjectionBase_h
|
|
|
|
/// \file pcl/ProjectionBase.h
|
|
|
|
#include <pcl/Defs.h>
|
|
|
|
#include <pcl/Optional.h>
|
|
#include <pcl/Point.h>
|
|
#include <pcl/SphericalRotation.h>
|
|
#include <pcl/WCSKeywords.h>
|
|
|
|
/*
|
|
* Based on original work contributed by Andrés del Pozo.
|
|
*/
|
|
|
|
namespace pcl
|
|
{
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* \class ProjectionBase
|
|
* \brief Base class of all projection systems
|
|
*
|
|
* \ingroup astrometry_support
|
|
*/
|
|
class PCL_CLASS ProjectionBase
|
|
{
|
|
public:
|
|
|
|
/*!
|
|
* Virtual destructor.
|
|
*/
|
|
virtual ~ProjectionBase()
|
|
{
|
|
}
|
|
|
|
/*!
|
|
* Returns a dynamically allocated duplicate of this object.
|
|
*/
|
|
virtual ProjectionBase* Clone() const = 0;
|
|
|
|
/*!
|
|
* Returns the WCS projection identifier for this projection system.
|
|
*/
|
|
virtual IsoString ProjCode() const = 0;
|
|
|
|
/*!
|
|
* Returns the readable name of this projection system.
|
|
*/
|
|
virtual IsoString Name() const = 0;
|
|
|
|
/*!
|
|
* Updates the specified WCS metadata with field values corresponding to
|
|
* this projection.
|
|
*/
|
|
virtual void GetWCS( WCSKeywords& wcs ) const;
|
|
|
|
/*!
|
|
*
|
|
*/
|
|
void InitFromRefPoint( double lng0, double lat0, const Optional<double>& phip = Optional<double>() );
|
|
|
|
/*!
|
|
* Transforms from celestial coordinates to world coordinates.
|
|
*/
|
|
virtual bool Direct( DPoint& pW, const DPoint& pRD ) const noexcept
|
|
{
|
|
DPoint pN = m_sph.CelestialToNative( pRD );
|
|
return IsFinite( pN.x ) && IsFinite( pN.y ) && Project( pW, pN );
|
|
}
|
|
|
|
/*!
|
|
* Transforms from world coordinates to celestial coordinates.
|
|
*/
|
|
virtual bool Inverse( DPoint& pRD, const DPoint& pW ) const noexcept
|
|
{
|
|
DPoint pN;
|
|
if ( Unproject( pN, pW ) )
|
|
if ( IsFinite( pN.x ) )
|
|
if ( IsFinite( pN.y ) )
|
|
{
|
|
pRD = m_sph.NativeToCelestial( pN );
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*!
|
|
*
|
|
*/
|
|
virtual bool CheckBrokenLine( const DPoint& cp1, const DPoint& cp2 ) const noexcept
|
|
{
|
|
return DistanceFast( m_sph.CelestialToNative( cp1 ), m_sph.CelestialToNative( cp2 ) ) < 150;
|
|
}
|
|
|
|
/*!
|
|
* Returns the equatorial coordinates of the projection origin.
|
|
*/
|
|
virtual DPoint ProjectionOrigin() const
|
|
{
|
|
return DPoint( Deg( m_ra0 ), Deg( m_dec0 ) );
|
|
}
|
|
|
|
/*!
|
|
* Returns the distance in degrees between two locations in equatorial
|
|
* coordinates.
|
|
*/
|
|
static double Distance( const DPoint& p1, const DPoint& p2 )
|
|
{
|
|
double sinX, cosX;
|
|
SinCos( Rad( Abs( p1.x - p2.x ) ), sinX, cosX );
|
|
double sinY1, cosY1;
|
|
SinCos( Rad( p1.y ), sinY1, cosY1 );
|
|
double sinY2, cosY2;
|
|
SinCos( Rad( p2.y ), sinY2, cosY2 );
|
|
double K = cosY1*sinY2 - sinY1*cosY2*cosX;
|
|
return Deg( ArcTan( Sqrt( cosY2*sinX*cosY2*sinX + K*K ), sinY1*sinY2 + cosY1*cosY2*cosX ) );
|
|
};
|
|
|
|
/*!
|
|
* Returns the distance in degrees between two locations in equatorial
|
|
* coordinates. Uses an approximate, faster algorithm.
|
|
*/
|
|
static double DistanceFast( const DPoint& p1, const DPoint& p2 )
|
|
{
|
|
double sinY1, cosY1;
|
|
SinCos( Rad( p1.y ), sinY1, cosY1 );
|
|
double sinY2, cosY2;
|
|
SinCos( Rad( p2.y ), sinY2, cosY2 );
|
|
return Deg( ArcCos( sinY1*sinY2 + cosY1*cosY2*Cos( Rad( p1.x - p2.x ) ) ) );
|
|
}
|
|
|
|
protected:
|
|
|
|
double m_ra0 = 0; // radians
|
|
double m_dec0 = 0; // radians
|
|
double m_theta0 = 0; // degrees
|
|
double m_phi0 = 0; // degrees
|
|
Optional<double> m_lonpole; // degrees
|
|
Optional<double> m_latpole; // degrees
|
|
SphericalRotation m_sph;
|
|
|
|
/*!
|
|
* Default constructor.
|
|
*/
|
|
ProjectionBase() = default;
|
|
|
|
/*!
|
|
* Copy constructor.
|
|
*/
|
|
ProjectionBase( const ProjectionBase& ) = default;
|
|
|
|
/*!
|
|
* Initialization from WCS metadata.
|
|
*/
|
|
void InitFromWCS( const WCSKeywords& );
|
|
|
|
/*!
|
|
* Transforms from world coordinates to native spherical coordinates.
|
|
*/
|
|
virtual bool Project( DPoint& pW, const DPoint& pN ) const noexcept = 0;
|
|
|
|
/*!
|
|
* Transforms from native spherical coordinates to world coordinates.
|
|
*/
|
|
virtual bool Unproject( DPoint& pN, const DPoint& pW ) const noexcept = 0;
|
|
|
|
friend class ProjectionFactory;
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
} // pcl
|
|
|
|
#endif // __PCL_ProjectionBase_h
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// EOF pcl/ProjectionBase.h - Released 2022-03-12T18:59:29Z
|