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/*!
* \file MathPlugin.h
*
* \author Roger James
* \date 13th November 2013
*
*/
#pragma once
#include "InMemoryDatabase.h"
namespace INDI
{
namespace AlignmentSubsystem
{
/*!
* \class MathPlugin
* \brief Provides alignment subsystem functions to INDI alignment math plugins
*
* \note This class is intended to be implemented within a dynamic shared object. If the
* implementation of this class uses a standard 3 by 3 transformation matrix to convert between coordinate systems
* then it will not normally need to know the handedness of either the celestial or telescope coordinate systems, as the
* necessary rotations and scaling will be handled in the derivation of the matrix coefficients. This will normally
* be done using the three reference (sync) points method. Knowledge of the handedness of the coordinate systems is needed
* when only two reference points are available and a third reference point has to artificially generated in order to
* derive the matrix coefficients.
*/
class MathPlugin
{
public:
/// \brief Default constructor
MathPlugin(MountAlignment_t ApproximateAlignment = ZENITH)
: ApproximateMountAlignment(ApproximateAlignment), pInMemoryDatabase(NULL)
{
}
/// \brief Virtual destructor
virtual ~MathPlugin() {}
// Public methods
/// \brief Get the approximate alognment of the mount
/// \return the approximate alignment
virtual MountAlignment_t GetApproximateMountAlignment()
{
return ApproximateMountAlignment;
}
/// \brief Initialise or re-initialise the math plugin. Re-reading the in memory database as necessary.
/// \return True if successful
virtual bool Initialise(InMemoryDatabase *pInMemoryDatabase);
/// \brief Set the approximate alognment of the mount
/// \param[in] ApproximateAlignment - the approximate alignment of the mount
virtual void SetApproximateMountAlignment(MountAlignment_t ApproximateAlignment)
{
ApproximateMountAlignment = ApproximateAlignment;
}
/// \brief Get the alignment corrected telescope pointing direction for the supplied celestial coordinates
/// \param[in] RightAscension Right Ascension (Decimal Hours).
/// \param[in] Declination Declination (Decimal Degrees).
/// \param[in] JulianOffset to be applied to the current julian date.
/// \param[out] ApparentTelescopeDirectionVector Parameter to receive the corrected telescope direction
/// \return True if successful
virtual bool TransformCelestialToTelescope(const double RightAscension, const double Declination,
double JulianOffset,
TelescopeDirectionVector &ApparentTelescopeDirectionVector) = 0;
/// \brief Get the true celestial coordinates for the supplied telescope pointing direction
/// \param[in] ApparentTelescopeDirectionVector the telescope direction
/// \param[out] RightAscension Parameter to receive the Right Ascension (Decimal Hours).
/// \param[out] Declination Parameter to receive the Declination (Decimal Degrees).
/// \return True if successful
virtual bool TransformTelescopeToCelestial(const TelescopeDirectionVector &ApparentTelescopeDirectionVector,
double &RightAscension, double &Declination) = 0;
protected:
// Protected properties
/// \brief Describe the approximate alignment of the mount. This information is normally used in a one star alignment
/// calculation.
MountAlignment_t ApproximateMountAlignment;
InMemoryDatabase *pInMemoryDatabase;
};
} // namespace AlignmentSubsystem
} // namespace INDI
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