AnnPolygon.h

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#ifndef ANNOTATIONS_ANNPOLYGON_H
#define ANNOTATIONS_ANNPOLYGON_H

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

namespace casa {

// <summary>
// This class represents a single polygon (in position coordinates) annotation specified
// in an ascii region file as proposed in CAS-2285
// </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 polygon annotation.
// </etymology>

// <synopsis>
// This class represents a polygon annotation.
// </synopsis>


class AnnPolygon: public AnnRegion {

public:

        AnnPolygon(
                const casacore::Vector<casacore::Quantity>& xPositions,
                const casacore::Vector<casacore::Quantity>& yPositions,
                const casacore::String& dirRefFrameString,
                const casacore::CoordinateSystem& csys,
                const casacore::IPosition& imShape,
                const casacore::Quantity& beginFreq,
                const casacore::Quantity& endFreq,
                const casacore::String& freqRefFrameString,
                const casacore::String& dopplerString,
                const casacore::Quantity& restfreq,
                const casacore::Vector<casacore::Stokes::StokesTypes> stokes,
                const casacore::Bool annotationOnly,
                const casacore::Bool requireImageRegion=true
        );

        // Simplified constructor.
        // all frequencies are used (these can be set after construction).
        // xPositions and yPositions
        // 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.
        AnnPolygon(
                const casacore::Vector<casacore::Quantity>& xPositions,
                const casacore::Vector<casacore::Quantity>& yPositions,
                const casacore::CoordinateSystem& csys,
                const casacore::IPosition& imShape,
                const casacore::Vector<casacore::Stokes::StokesTypes>& stokes,
                const casacore::Bool requireImageRegion=true
        );

        // implicit copy constructor and destructor are fine

        AnnPolygon& operator=(const AnnPolygon& other);

        // get the vertices converted to the coordinate system used at construction.
        casacore::Vector<casacore::MDirection> getCorners() const;

        // get the world coordinates of the polygon vertices
        void worldVertices(std::vector<casacore::Quantity>& x, std::vector<casacore::Quantity>& y) const;

        // get the pixel coordinates of the polygon vertices
        void pixelVertices(std::vector<casacore::Double>& x, std::vector<casacore::Double>& y) const;


        virtual std::ostream& print(std::ostream &os) const;

protected:
        // for rectangle subclasses
        AnnPolygon(
                AnnotationBase::Type shape,
                const casacore::Quantity& blcx,
                const casacore::Quantity& blcy,
                const casacore::Quantity& trcx,
                const casacore::Quantity& trcy,
                const casacore::String& dirRefFrameString,
                const casacore::CoordinateSystem& csys,
                const casacore::IPosition& imShape,
                const casacore::Quantity& beginFreq,
                const casacore::Quantity& endFreq,
                const casacore::String& freqRefFrameString,
                const casacore::String& dopplerString,
                const casacore::Quantity& restfreq,
                const casacore::Vector<casacore::Stokes::StokesTypes> stokes,
                const casacore::Bool annotationOnly,
                const casacore::Bool requireImageRegion=true
        );

        // Simplified constructor.
        // all frequencies are used (these can be set after construction).
        // blcx, blcy, trcx, and trcy
        // 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.
        AnnPolygon(
                AnnotationBase::Type shape,
                const casacore::Quantity& blcx,
                const casacore::Quantity& blcy,
                const casacore::Quantity& trcx,
                const casacore::Quantity& trcy,
                const casacore::CoordinateSystem& csys,
                const casacore::IPosition& imShape,
                const casacore::Vector<casacore::Stokes::StokesTypes>& stokes,
                const casacore::Bool requireImageRegion=true
        );

        // For centered rectangles
        AnnPolygon(
                AnnotationBase::Type shape,
                const casacore::Quantity& centerx,
                const casacore::Quantity& centery,
                const casacore::Quantity& widthx,
                const casacore::Quantity& widthy,
                const casacore::Quantity& positionAngle,
                const casacore::String& dirRefFrameString,
                const casacore::CoordinateSystem& csys,
                const casacore::IPosition& imShape,
                const casacore::Quantity& beginFreq,
                const casacore::Quantity& endFreq,
                const casacore::String& freqRefFrameString,
                const casacore::String& dopplerString,
                const casacore::Quantity& restfreq,
                const casacore::Vector<casacore::Stokes::StokesTypes> stokes,
                const casacore::Bool annotationOnly,
                const casacore::Bool requireImageRegion=true
        );

                // Simplified constructor.
                // all frequencies are used (these can be set after construction).
                // centerx and centery
                // 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.
                AnnPolygon(
                        AnnotationBase::Type shape,
                        const casacore::Quantity& centerx,
                        const casacore::Quantity& centery,
                        const casacore::Quantity& widthx,
                        const casacore::Quantity& widthy,
                        const casacore::Quantity& positionAngle,
                        const casacore::CoordinateSystem& csys,
                        const casacore::IPosition& imShape,
                        const casacore::Vector<casacore::Stokes::StokesTypes>& stokes,
                        const casacore::Bool requireImageRegion=true
                );

private:
        casacore::Vector<casacore::Quantity> _origXPos, _origYPos;

        void _init();

        void _initCorners(
                const casacore::Quantity& blcx,
                const casacore::Quantity& blcy,
                const casacore::Quantity& trcx,
                const casacore::Quantity& trcy
        );

        void _initCorners(
                const casacore::MDirection& blc,
                const casacore::MDirection& corner2,
                const casacore::MDirection& trc,
                const casacore::MDirection& corner4
        );

        void _initCenterRectCorners(
                const casacore::Quantity& centerx,
                const casacore::Quantity& centery,
                const casacore::Quantity& widthx,
                const casacore::Quantity& widthy,
                const casacore::Quantity& positionAngle
        );

        void _doCorners(const casacore::Quantity& widthx, const casacore::Quantity widthy);

};

}

#endif /* ASCIIPOLYGONREGION_H_ */