AnnAnnulus.h

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#ifndef REGIONS_ANNANNULUS_H
#define REGIONS_ANNANNULUS_H

#include <casa/aips.h>
#include <imageanalysis/Annotations/AnnRegion.h>

namespace casa {

// <summary>
// This class represents an annotation for an annular (in position coordinates) region specified
// in an ascii region file as proposed in CAS-2285. It is specified by its center position
// and inner and outer radii.
// </summary>
// <author>Dave Mehringer</author>
// <use visibility=export>
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
// <prerequisite>

// </prerequisite>

// <etymology>
// Holds the specification of a annotation for an annular region as specified in ASCII format.
// Specified by center position and inner and outer radii.
// </etymology>

// <synopsis>
// This class represents a annotation for an annular region in specified by
// center and inner and outer radii.
// </synopsis>


class AnnAnnulus: public AnnRegion {

public:

        AnnAnnulus(
                const Quantity& xcenter,
                const Quantity& ycenter,
                const Quantity& innerRadius,
                const Quantity& outerRadius,
                const String& dirRefFrameString,
                const CoordinateSystem& csys,
                const IPosition& imShape,
                const Quantity& beginFreq,
                const Quantity& endFreq,
                const String& freqRefFrameString,
                const String& dopplerString,
                const Quantity& restfreq,
                const Vector<Stokes::StokesTypes> stokes,
                const Bool annotationOnly
        );

        // Simplified constructor.
        // all frequencies and all polarizations are used (these can be set after construction).
        // xcenter and ycenter
        // must be in the same frame as the csys direction coordinate.
        // is a region (not just an annotation), although this value can be changed after
        // construction.
        AnnAnnulus(
                const Quantity& xcenter,
                const Quantity& ycenter,
                const Quantity& innerRadius,
                const Quantity& outerRadius,
                const CoordinateSystem& csys,
                const IPosition& imShape,
                const Vector<Stokes::StokesTypes>& stokes
        );

        // the default copy constructor and destructor are fine

        AnnAnnulus& operator=(const AnnAnnulus& other);

        // get the center position, converted to the frame
        // of the input coordinate system if necessary
        MDirection getCenter() const;

        // get the radii in angular units. The first
        // value will be the inner radius, the second
        // the outer
        Vector<Quantity> getRadii() const;

        virtual ostream& print(ostream &os) const;

private:
        Vector<Quantity> _convertedRadii;
        Quantity _xcenter, _ycenter, _innerRadius, _outerRadius;

        void _init();
};

}

#endif /* ANNANNULUS_H */